1 | /* |
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2 | * tclBasic.c -- |
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3 | * |
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4 | * Contains the basic facilities for TCL command interpretation, |
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5 | * including interpreter creation and deletion, command creation |
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6 | * and deletion, and command parsing and execution. |
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7 | * |
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8 | * Copyright (c) 1987-1994 The Regents of the University of California. |
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9 | * Copyright (c) 1994-1997 Sun Microsystems, Inc. |
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10 | * Copyright (c) 1998-1999 by Scriptics Corporation. |
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11 | * |
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12 | * See the file "license.terms" for information on usage and redistribution |
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13 | * of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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14 | * |
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15 | * RCS: @(#) $Id: tclBasic.c,v 1.1 2008-06-04 13:58:03 demin Exp $ |
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16 | */ |
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17 | |
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18 | #include "tclInt.h" |
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19 | #include "tclCompile.h" |
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20 | #ifndef TCL_GENERIC_ONLY |
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21 | # include "tclPort.h" |
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22 | #endif |
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23 | |
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24 | /* |
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25 | * Static procedures in this file: |
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26 | */ |
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27 | |
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28 | static void DeleteInterpProc _ANSI_ARGS_((Tcl_Interp *interp)); |
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29 | static void HiddenCmdsDeleteProc _ANSI_ARGS_(( |
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30 | ClientData clientData, Tcl_Interp *interp)); |
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31 | |
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32 | /* |
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33 | * The following structure defines the commands in the Tcl core. |
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34 | */ |
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35 | |
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36 | typedef struct { |
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37 | char *name; /* Name of object-based command. */ |
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38 | Tcl_CmdProc *proc; /* String-based procedure for command. */ |
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39 | Tcl_ObjCmdProc *objProc; /* Object-based procedure for command. */ |
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40 | CompileProc *compileProc; /* Procedure called to compile command. */ |
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41 | int isSafe; /* If non-zero, command will be present |
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42 | * in safe interpreter. Otherwise it will |
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43 | * be hidden. */ |
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44 | } CmdInfo; |
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45 | |
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46 | /* |
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47 | * The built-in commands, and the procedures that implement them: |
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48 | */ |
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49 | |
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50 | static CmdInfo builtInCmds[] = { |
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51 | /* |
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52 | * Commands in the generic core. Note that at least one of the proc or |
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53 | * objProc members should be non-NULL. This avoids infinitely recursive |
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54 | * calls between TclInvokeObjectCommand and TclInvokeStringCommand if a |
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55 | * command name is computed at runtime and results in the name of a |
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56 | * compiled command. |
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57 | */ |
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58 | |
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59 | {"append", (Tcl_CmdProc *) NULL, Tcl_AppendObjCmd, |
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60 | (CompileProc *) NULL, 1}, |
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61 | {"array", (Tcl_CmdProc *) NULL, Tcl_ArrayObjCmd, |
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62 | (CompileProc *) NULL, 1}, |
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63 | {"break", Tcl_BreakCmd, (Tcl_ObjCmdProc *) NULL, |
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64 | TclCompileBreakCmd, 1}, |
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65 | {"case", (Tcl_CmdProc *) NULL, Tcl_CaseObjCmd, |
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66 | (CompileProc *) NULL, 1}, |
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67 | {"catch", (Tcl_CmdProc *) NULL, Tcl_CatchObjCmd, |
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68 | TclCompileCatchCmd, 1}, |
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69 | {"concat", (Tcl_CmdProc *) NULL, Tcl_ConcatObjCmd, |
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70 | (CompileProc *) NULL, 1}, |
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71 | {"continue", Tcl_ContinueCmd, (Tcl_ObjCmdProc *) NULL, |
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72 | TclCompileContinueCmd, 1}, |
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73 | {"error", (Tcl_CmdProc *) NULL, Tcl_ErrorObjCmd, |
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74 | (CompileProc *) NULL, 1}, |
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75 | {"eval", (Tcl_CmdProc *) NULL, Tcl_EvalObjCmd, |
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76 | (CompileProc *) NULL, 1}, |
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77 | {"expr", (Tcl_CmdProc *) NULL, Tcl_ExprObjCmd, |
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78 | TclCompileExprCmd, 1}, |
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79 | {"for", Tcl_ForCmd, (Tcl_ObjCmdProc *) NULL, |
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80 | TclCompileForCmd, 1}, |
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81 | {"foreach", (Tcl_CmdProc *) NULL, Tcl_ForeachObjCmd, |
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82 | TclCompileForeachCmd, 1}, |
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83 | {"format", (Tcl_CmdProc *) NULL, Tcl_FormatObjCmd, |
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84 | (CompileProc *) NULL, 1}, |
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85 | {"global", (Tcl_CmdProc *) NULL, Tcl_GlobalObjCmd, |
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86 | (CompileProc *) NULL, 1}, |
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87 | {"if", Tcl_IfCmd, (Tcl_ObjCmdProc *) NULL, |
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88 | TclCompileIfCmd, 1}, |
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89 | {"incr", Tcl_IncrCmd, (Tcl_ObjCmdProc *) NULL, |
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90 | TclCompileIncrCmd, 1}, |
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91 | {"info", (Tcl_CmdProc *) NULL, Tcl_InfoObjCmd, |
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92 | (CompileProc *) NULL, 1}, |
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93 | {"join", (Tcl_CmdProc *) NULL, Tcl_JoinObjCmd, |
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94 | (CompileProc *) NULL, 1}, |
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95 | {"lappend", (Tcl_CmdProc *) NULL, Tcl_LappendObjCmd, |
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96 | (CompileProc *) NULL, 1}, |
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97 | {"add", (Tcl_CmdProc *) NULL, Tcl_LappendObjCmd, |
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98 | (CompileProc *) NULL, 1}, |
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99 | {"lindex", (Tcl_CmdProc *) NULL, Tcl_LindexObjCmd, |
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100 | (CompileProc *) NULL, 1}, |
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101 | {"linsert", (Tcl_CmdProc *) NULL, Tcl_LinsertObjCmd, |
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102 | (CompileProc *) NULL, 1}, |
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103 | {"list", (Tcl_CmdProc *) NULL, Tcl_ListObjCmd, |
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104 | (CompileProc *) NULL, 1}, |
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105 | {"llength", (Tcl_CmdProc *) NULL, Tcl_LlengthObjCmd, |
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106 | (CompileProc *) NULL, 1}, |
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107 | {"lrange", (Tcl_CmdProc *) NULL, Tcl_LrangeObjCmd, |
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108 | (CompileProc *) NULL, 1}, |
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109 | {"lreplace", (Tcl_CmdProc *) NULL, Tcl_LreplaceObjCmd, |
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110 | (CompileProc *) NULL, 1}, |
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111 | {"lsort", (Tcl_CmdProc *) NULL, Tcl_LsortObjCmd, |
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112 | (CompileProc *) NULL, 1}, |
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113 | {"namespace", (Tcl_CmdProc *) NULL, Tcl_NamespaceObjCmd, |
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114 | (CompileProc *) NULL, 1}, |
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115 | {"proc", (Tcl_CmdProc *) NULL, Tcl_ProcObjCmd, |
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116 | (CompileProc *) NULL, 1}, |
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117 | {"return", (Tcl_CmdProc *) NULL, Tcl_ReturnObjCmd, |
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118 | (CompileProc *) NULL, 1}, |
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119 | {"scan", Tcl_ScanCmd, (Tcl_ObjCmdProc *) NULL, |
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120 | (CompileProc *) NULL, 1}, |
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121 | {"set", Tcl_SetCmd, (Tcl_ObjCmdProc *) NULL, |
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122 | TclCompileSetCmd, 1}, |
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123 | {"split", (Tcl_CmdProc *) NULL, Tcl_SplitObjCmd, |
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124 | (CompileProc *) NULL, 1}, |
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125 | {"string", (Tcl_CmdProc *) NULL, Tcl_StringObjCmd, |
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126 | (CompileProc *) NULL, 1}, |
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127 | {"subst", Tcl_SubstCmd, (Tcl_ObjCmdProc *) NULL, |
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128 | (CompileProc *) NULL, 1}, |
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129 | {"trace", Tcl_TraceCmd, (Tcl_ObjCmdProc *) NULL, |
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130 | (CompileProc *) NULL, 1}, |
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131 | {"unset", (Tcl_CmdProc *) NULL, Tcl_UnsetObjCmd, |
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132 | (CompileProc *) NULL, 1}, |
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133 | {"uplevel", (Tcl_CmdProc *) NULL, Tcl_UplevelObjCmd, |
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134 | (CompileProc *) NULL, 1}, |
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135 | {"upvar", (Tcl_CmdProc *) NULL, Tcl_UpvarObjCmd, |
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136 | (CompileProc *) NULL, 1}, |
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137 | {"variable", (Tcl_CmdProc *) NULL, Tcl_VariableObjCmd, |
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138 | (CompileProc *) NULL, 1}, |
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139 | {"while", Tcl_WhileCmd, (Tcl_ObjCmdProc *) NULL, |
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140 | TclCompileWhileCmd, 1}, |
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141 | |
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142 | {NULL, (Tcl_CmdProc *) NULL, (Tcl_ObjCmdProc *) NULL, |
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143 | (CompileProc *) NULL, 0} |
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144 | }; |
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145 | |
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146 | /* |
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147 | *---------------------------------------------------------------------- |
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148 | * |
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149 | * Tcl_CreateInterp -- |
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150 | * |
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151 | * Create a new TCL command interpreter. |
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152 | * |
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153 | * Results: |
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154 | * The return value is a token for the interpreter, which may be |
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155 | * used in calls to procedures like Tcl_CreateCmd, Tcl_Eval, or |
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156 | * Tcl_DeleteInterp. |
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157 | * |
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158 | * Side effects: |
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159 | * The command interpreter is initialized with an empty variable |
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160 | * table and the built-in commands. |
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161 | * |
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162 | *---------------------------------------------------------------------- |
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163 | */ |
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164 | |
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165 | Tcl_Interp * |
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166 | Tcl_CreateInterp() |
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167 | { |
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168 | register Interp *iPtr; |
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169 | register Command *cmdPtr; |
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170 | register CmdInfo *cmdInfoPtr; |
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171 | union { |
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172 | char c[sizeof(short)]; |
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173 | short s; |
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174 | } order; |
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175 | |
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176 | /* |
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177 | * Panic if someone updated the CallFrame structure without |
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178 | * also updating the Tcl_CallFrame structure (or vice versa). |
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179 | */ |
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180 | |
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181 | if (sizeof(Tcl_CallFrame) != sizeof(CallFrame)) { |
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182 | /*NOTREACHED*/ |
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183 | panic("Tcl_CallFrame and CallFrame are not the same size"); |
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184 | } |
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185 | |
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186 | /* |
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187 | * Initialize support for namespaces and create the global namespace |
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188 | * (whose name is ""; an alias is "::"). This also initializes the |
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189 | * Tcl object type table and other object management code. |
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190 | */ |
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191 | |
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192 | TclInitNamespaces(); |
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193 | |
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194 | iPtr = (Interp *) ckalloc(sizeof(Interp)); |
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195 | iPtr->result = iPtr->resultSpace; |
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196 | iPtr->freeProc = 0; |
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197 | iPtr->objResultPtr = Tcl_NewObj(); /* an empty object */ |
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198 | Tcl_IncrRefCount(iPtr->objResultPtr); |
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199 | iPtr->errorLine = 0; |
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200 | Tcl_InitHashTable(&iPtr->mathFuncTable, TCL_STRING_KEYS); |
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201 | iPtr->numLevels = 0; |
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202 | iPtr->maxNestingDepth = 1000; |
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203 | iPtr->framePtr = NULL; |
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204 | iPtr->varFramePtr = NULL; |
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205 | iPtr->activeTracePtr = NULL; |
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206 | iPtr->returnCode = TCL_OK; |
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207 | iPtr->errorInfo = NULL; |
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208 | iPtr->errorCode = NULL; |
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209 | iPtr->appendResult = NULL; |
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210 | iPtr->appendAvl = 0; |
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211 | iPtr->appendUsed = 0; |
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212 | iPtr->cmdCount = 0; |
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213 | iPtr->termOffset = 0; |
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214 | iPtr->compileEpoch = 0; |
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215 | iPtr->compiledProcPtr = NULL; |
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216 | iPtr->resolverPtr = NULL; |
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217 | iPtr->evalFlags = 0; |
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218 | iPtr->scriptFile = NULL; |
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219 | iPtr->flags = 0; |
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220 | iPtr->tracePtr = NULL; |
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221 | iPtr->assocData = (Tcl_HashTable *) NULL; |
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222 | iPtr->execEnvPtr = NULL; /* set after namespaces initialized */ |
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223 | iPtr->emptyObjPtr = Tcl_NewObj(); /* another empty object */ |
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224 | Tcl_IncrRefCount(iPtr->emptyObjPtr); |
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225 | iPtr->resultSpace[0] = 0; |
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226 | |
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227 | iPtr->globalNsPtr = NULL; /* force creation of global ns below */ |
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228 | iPtr->globalNsPtr = (Namespace *) Tcl_CreateNamespace( |
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229 | (Tcl_Interp *) iPtr, "", (ClientData) NULL, |
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230 | (Tcl_NamespaceDeleteProc *) NULL); |
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231 | if (iPtr->globalNsPtr == NULL) { |
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232 | panic("Tcl_CreateInterp: can't create global namespace"); |
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233 | } |
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234 | |
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235 | /* |
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236 | * Initialize support for code compilation. Do this after initializing |
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237 | * namespaces since TclCreateExecEnv will try to reference a Tcl |
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238 | * variable (it links to the Tcl "tcl_traceExec" variable). |
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239 | */ |
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240 | |
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241 | iPtr->execEnvPtr = TclCreateExecEnv((Tcl_Interp *) iPtr); |
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242 | |
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243 | /* |
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244 | * Create the core commands. Do it here, rather than calling |
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245 | * Tcl_CreateCommand, because it's faster (there's no need to check for |
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246 | * a pre-existing command by the same name). If a command has a |
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247 | * Tcl_CmdProc but no Tcl_ObjCmdProc, set the Tcl_ObjCmdProc to |
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248 | * TclInvokeStringCommand. This is an object-based wrapper procedure |
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249 | * that extracts strings, calls the string procedure, and creates an |
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250 | * object for the result. Similarly, if a command has a Tcl_ObjCmdProc |
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251 | * but no Tcl_CmdProc, set the Tcl_CmdProc to TclInvokeObjectCommand. |
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252 | */ |
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253 | |
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254 | for (cmdInfoPtr = builtInCmds; cmdInfoPtr->name != NULL; |
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255 | cmdInfoPtr++) { |
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256 | int new; |
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257 | Tcl_HashEntry *hPtr; |
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258 | |
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259 | if ((cmdInfoPtr->proc == (Tcl_CmdProc *) NULL) |
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260 | && (cmdInfoPtr->objProc == (Tcl_ObjCmdProc *) NULL) |
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261 | && (cmdInfoPtr->compileProc == (CompileProc *) NULL)) { |
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262 | panic("Tcl_CreateInterp: builtin command with NULL string and object command procs and a NULL compile proc\n"); |
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263 | } |
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264 | |
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265 | hPtr = Tcl_CreateHashEntry(&iPtr->globalNsPtr->cmdTable, |
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266 | cmdInfoPtr->name, &new); |
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267 | if (new) { |
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268 | cmdPtr = (Command *) ckalloc(sizeof(Command)); |
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269 | cmdPtr->hPtr = hPtr; |
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270 | cmdPtr->nsPtr = iPtr->globalNsPtr; |
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271 | cmdPtr->refCount = 1; |
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272 | cmdPtr->cmdEpoch = 0; |
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273 | cmdPtr->compileProc = cmdInfoPtr->compileProc; |
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274 | if (cmdInfoPtr->proc == (Tcl_CmdProc *) NULL) { |
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275 | cmdPtr->proc = TclInvokeObjectCommand; |
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276 | cmdPtr->clientData = (ClientData) cmdPtr; |
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277 | } else { |
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278 | cmdPtr->proc = cmdInfoPtr->proc; |
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279 | cmdPtr->clientData = (ClientData) NULL; |
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280 | } |
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281 | if (cmdInfoPtr->objProc == (Tcl_ObjCmdProc *) NULL) { |
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282 | cmdPtr->objProc = TclInvokeStringCommand; |
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283 | cmdPtr->objClientData = (ClientData) cmdPtr; |
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284 | } else { |
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285 | cmdPtr->objProc = cmdInfoPtr->objProc; |
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286 | cmdPtr->objClientData = (ClientData) NULL; |
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287 | } |
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288 | cmdPtr->deleteProc = NULL; |
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289 | cmdPtr->deleteData = (ClientData) NULL; |
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290 | cmdPtr->deleted = 0; |
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291 | cmdPtr->importRefPtr = NULL; |
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292 | Tcl_SetHashValue(hPtr, cmdPtr); |
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293 | } |
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294 | } |
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295 | |
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296 | /* |
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297 | * Initialize/Create "errorInfo" and "errorCode" global vars |
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298 | * (because some part of the C code assume they exists |
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299 | * and we can get a seg fault otherwise (in multiple |
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300 | * interps loading of extensions for instance) --dl) |
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301 | */ |
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302 | /* |
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303 | * We can't assume that because we initialize |
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304 | * the variables here, they won't be unset later. |
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305 | * so we had 2 choices: |
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306 | * + Check every place where a GetVar of those is used |
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307 | * and the NULL result is not checked (like in tclLoad.c) |
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308 | * + Make SetVar,... NULL friendly |
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309 | * We choosed the second option because : |
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310 | * + It is easy and low cost to check for NULL pointer before |
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311 | * calling strlen() |
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312 | * + It can be helpfull to other people using those API |
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313 | * + Passing a NULL value to those closest 'meaning' is empty string |
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314 | * (specially with the new objects where 0 bytes strings are ok) |
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315 | * So the following init is commented out: -- dl |
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316 | */ |
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317 | /* |
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318 | (void)Tcl_SetVar2((Tcl_Interp *)iPtr, "errorInfo", (char *) NULL, "", |
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319 | TCL_GLOBAL_ONLY); |
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320 | (void)Tcl_SetVar2((Tcl_Interp *)iPtr, "errorCode", (char *) NULL, "NONE", |
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321 | TCL_GLOBAL_ONLY); |
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322 | */ |
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323 | |
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324 | /* |
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325 | * Set up variables such as tcl_version. |
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326 | */ |
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327 | |
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328 | Tcl_SetVar((Tcl_Interp *) iPtr, "tcl_patchLevel", TCL_PATCH_LEVEL, |
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329 | TCL_GLOBAL_ONLY); |
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330 | Tcl_SetVar((Tcl_Interp *) iPtr, "tcl_version", TCL_VERSION, |
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331 | TCL_GLOBAL_ONLY); |
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332 | Tcl_TraceVar2((Tcl_Interp *) iPtr, "tcl_precision", (char *) NULL, |
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333 | TCL_GLOBAL_ONLY|TCL_TRACE_READS|TCL_TRACE_WRITES|TCL_TRACE_UNSETS, |
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334 | TclPrecTraceProc, (ClientData) NULL); |
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335 | |
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336 | /* |
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337 | * Compute the byte order of this machine. |
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338 | */ |
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339 | |
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340 | order.s = 1; |
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341 | Tcl_SetVar2((Tcl_Interp *) iPtr, "tcl_platform", "byteOrder", |
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342 | (order.c[0] == 1) ? "littleEndian" : "bigEndian", |
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343 | TCL_GLOBAL_ONLY); |
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344 | |
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345 | return (Tcl_Interp *) iPtr; |
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346 | } |
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347 | |
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348 | /* |
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349 | *-------------------------------------------------------------- |
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350 | * |
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351 | * Tcl_CallWhenDeleted -- |
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352 | * |
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353 | * Arrange for a procedure to be called before a given |
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354 | * interpreter is deleted. The procedure is called as soon |
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355 | * as Tcl_DeleteInterp is called; if Tcl_CallWhenDeleted is |
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356 | * called on an interpreter that has already been deleted, |
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357 | * the procedure will be called when the last Tcl_Release is |
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358 | * done on the interpreter. |
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359 | * |
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360 | * Results: |
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361 | * None. |
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362 | * |
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363 | * Side effects: |
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364 | * When Tcl_DeleteInterp is invoked to delete interp, |
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365 | * proc will be invoked. See the manual entry for |
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366 | * details. |
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367 | * |
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368 | *-------------------------------------------------------------- |
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369 | */ |
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370 | |
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371 | void |
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372 | Tcl_CallWhenDeleted(interp, proc, clientData) |
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373 | Tcl_Interp *interp; /* Interpreter to watch. */ |
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374 | Tcl_InterpDeleteProc *proc; /* Procedure to call when interpreter |
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375 | * is about to be deleted. */ |
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376 | ClientData clientData; /* One-word value to pass to proc. */ |
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377 | { |
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378 | Interp *iPtr = (Interp *) interp; |
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379 | static int assocDataCounter = 0; |
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380 | int new; |
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381 | char buffer[128]; |
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382 | AssocData *dPtr = (AssocData *) ckalloc(sizeof(AssocData)); |
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383 | Tcl_HashEntry *hPtr; |
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384 | |
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385 | sprintf(buffer, "Assoc Data Key #%d", assocDataCounter); |
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386 | assocDataCounter++; |
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387 | |
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388 | if (iPtr->assocData == (Tcl_HashTable *) NULL) { |
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389 | iPtr->assocData = (Tcl_HashTable *) ckalloc(sizeof(Tcl_HashTable)); |
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390 | Tcl_InitHashTable(iPtr->assocData, TCL_STRING_KEYS); |
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391 | } |
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392 | hPtr = Tcl_CreateHashEntry(iPtr->assocData, buffer, &new); |
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393 | dPtr->proc = proc; |
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394 | dPtr->clientData = clientData; |
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395 | Tcl_SetHashValue(hPtr, dPtr); |
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396 | } |
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397 | |
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398 | /* |
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399 | *-------------------------------------------------------------- |
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400 | * |
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401 | * Tcl_DontCallWhenDeleted -- |
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402 | * |
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403 | * Cancel the arrangement for a procedure to be called when |
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404 | * a given interpreter is deleted. |
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405 | * |
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406 | * Results: |
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407 | * None. |
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408 | * |
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409 | * Side effects: |
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410 | * If proc and clientData were previously registered as a |
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411 | * callback via Tcl_CallWhenDeleted, they are unregistered. |
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412 | * If they weren't previously registered then nothing |
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413 | * happens. |
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414 | * |
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415 | *-------------------------------------------------------------- |
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416 | */ |
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417 | |
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418 | void |
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419 | Tcl_DontCallWhenDeleted(interp, proc, clientData) |
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420 | Tcl_Interp *interp; /* Interpreter to watch. */ |
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421 | Tcl_InterpDeleteProc *proc; /* Procedure to call when interpreter |
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422 | * is about to be deleted. */ |
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423 | ClientData clientData; /* One-word value to pass to proc. */ |
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424 | { |
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425 | Interp *iPtr = (Interp *) interp; |
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426 | Tcl_HashTable *hTablePtr; |
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427 | Tcl_HashSearch hSearch; |
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428 | Tcl_HashEntry *hPtr; |
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429 | AssocData *dPtr; |
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430 | |
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431 | hTablePtr = iPtr->assocData; |
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432 | if (hTablePtr == (Tcl_HashTable *) NULL) { |
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433 | return; |
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434 | } |
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435 | for (hPtr = Tcl_FirstHashEntry(hTablePtr, &hSearch); hPtr != NULL; |
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436 | hPtr = Tcl_NextHashEntry(&hSearch)) { |
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437 | dPtr = (AssocData *) Tcl_GetHashValue(hPtr); |
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438 | if ((dPtr->proc == proc) && (dPtr->clientData == clientData)) { |
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439 | ckfree((char *) dPtr); |
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440 | Tcl_DeleteHashEntry(hPtr); |
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441 | return; |
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442 | } |
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443 | } |
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444 | } |
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445 | |
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446 | /* |
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447 | *---------------------------------------------------------------------- |
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448 | * |
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449 | * Tcl_SetAssocData -- |
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450 | * |
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451 | * Creates a named association between user-specified data, a delete |
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452 | * function and this interpreter. If the association already exists |
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453 | * the data is overwritten with the new data. The delete function will |
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454 | * be invoked when the interpreter is deleted. |
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455 | * |
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456 | * Results: |
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457 | * None. |
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458 | * |
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459 | * Side effects: |
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460 | * Sets the associated data, creates the association if needed. |
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461 | * |
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462 | *---------------------------------------------------------------------- |
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463 | */ |
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464 | |
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465 | void |
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466 | Tcl_SetAssocData(interp, name, proc, clientData) |
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467 | Tcl_Interp *interp; /* Interpreter to associate with. */ |
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468 | char *name; /* Name for association. */ |
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469 | Tcl_InterpDeleteProc *proc; /* Proc to call when interpreter is |
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470 | * about to be deleted. */ |
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471 | ClientData clientData; /* One-word value to pass to proc. */ |
---|
472 | { |
---|
473 | Interp *iPtr = (Interp *) interp; |
---|
474 | AssocData *dPtr; |
---|
475 | Tcl_HashEntry *hPtr; |
---|
476 | int new; |
---|
477 | |
---|
478 | if (iPtr->assocData == (Tcl_HashTable *) NULL) { |
---|
479 | iPtr->assocData = (Tcl_HashTable *) ckalloc(sizeof(Tcl_HashTable)); |
---|
480 | Tcl_InitHashTable(iPtr->assocData, TCL_STRING_KEYS); |
---|
481 | } |
---|
482 | hPtr = Tcl_CreateHashEntry(iPtr->assocData, name, &new); |
---|
483 | if (new == 0) { |
---|
484 | dPtr = (AssocData *) Tcl_GetHashValue(hPtr); |
---|
485 | } else { |
---|
486 | dPtr = (AssocData *) ckalloc(sizeof(AssocData)); |
---|
487 | } |
---|
488 | dPtr->proc = proc; |
---|
489 | dPtr->clientData = clientData; |
---|
490 | |
---|
491 | Tcl_SetHashValue(hPtr, dPtr); |
---|
492 | } |
---|
493 | |
---|
494 | /* |
---|
495 | *---------------------------------------------------------------------- |
---|
496 | * |
---|
497 | * Tcl_DeleteAssocData -- |
---|
498 | * |
---|
499 | * Deletes a named association of user-specified data with |
---|
500 | * the specified interpreter. |
---|
501 | * |
---|
502 | * Results: |
---|
503 | * None. |
---|
504 | * |
---|
505 | * Side effects: |
---|
506 | * Deletes the association. |
---|
507 | * |
---|
508 | *---------------------------------------------------------------------- |
---|
509 | */ |
---|
510 | |
---|
511 | void |
---|
512 | Tcl_DeleteAssocData(interp, name) |
---|
513 | Tcl_Interp *interp; /* Interpreter to associate with. */ |
---|
514 | char *name; /* Name of association. */ |
---|
515 | { |
---|
516 | Interp *iPtr = (Interp *) interp; |
---|
517 | AssocData *dPtr; |
---|
518 | Tcl_HashEntry *hPtr; |
---|
519 | |
---|
520 | if (iPtr->assocData == (Tcl_HashTable *) NULL) { |
---|
521 | return; |
---|
522 | } |
---|
523 | hPtr = Tcl_FindHashEntry(iPtr->assocData, name); |
---|
524 | if (hPtr == (Tcl_HashEntry *) NULL) { |
---|
525 | return; |
---|
526 | } |
---|
527 | dPtr = (AssocData *) Tcl_GetHashValue(hPtr); |
---|
528 | if (dPtr->proc != NULL) { |
---|
529 | (dPtr->proc) (dPtr->clientData, interp); |
---|
530 | } |
---|
531 | ckfree((char *) dPtr); |
---|
532 | Tcl_DeleteHashEntry(hPtr); |
---|
533 | } |
---|
534 | |
---|
535 | /* |
---|
536 | *---------------------------------------------------------------------- |
---|
537 | * |
---|
538 | * Tcl_GetAssocData -- |
---|
539 | * |
---|
540 | * Returns the client data associated with this name in the |
---|
541 | * specified interpreter. |
---|
542 | * |
---|
543 | * Results: |
---|
544 | * The client data in the AssocData record denoted by the named |
---|
545 | * association, or NULL. |
---|
546 | * |
---|
547 | * Side effects: |
---|
548 | * None. |
---|
549 | * |
---|
550 | *---------------------------------------------------------------------- |
---|
551 | */ |
---|
552 | |
---|
553 | ClientData |
---|
554 | Tcl_GetAssocData(interp, name, procPtr) |
---|
555 | Tcl_Interp *interp; /* Interpreter associated with. */ |
---|
556 | char *name; /* Name of association. */ |
---|
557 | Tcl_InterpDeleteProc **procPtr; /* Pointer to place to store address |
---|
558 | * of current deletion callback. */ |
---|
559 | { |
---|
560 | Interp *iPtr = (Interp *) interp; |
---|
561 | AssocData *dPtr; |
---|
562 | Tcl_HashEntry *hPtr; |
---|
563 | |
---|
564 | if (iPtr->assocData == (Tcl_HashTable *) NULL) { |
---|
565 | return (ClientData) NULL; |
---|
566 | } |
---|
567 | hPtr = Tcl_FindHashEntry(iPtr->assocData, name); |
---|
568 | if (hPtr == (Tcl_HashEntry *) NULL) { |
---|
569 | return (ClientData) NULL; |
---|
570 | } |
---|
571 | dPtr = (AssocData *) Tcl_GetHashValue(hPtr); |
---|
572 | if (procPtr != (Tcl_InterpDeleteProc **) NULL) { |
---|
573 | *procPtr = dPtr->proc; |
---|
574 | } |
---|
575 | return dPtr->clientData; |
---|
576 | } |
---|
577 | |
---|
578 | /* |
---|
579 | *---------------------------------------------------------------------- |
---|
580 | * |
---|
581 | * DeleteInterpProc -- |
---|
582 | * |
---|
583 | * Helper procedure to delete an interpreter. This procedure is |
---|
584 | * called when the last call to Tcl_Preserve on this interpreter |
---|
585 | * is matched by a call to Tcl_Release. The procedure cleans up |
---|
586 | * all resources used in the interpreter and calls all currently |
---|
587 | * registered interpreter deletion callbacks. |
---|
588 | * |
---|
589 | * Results: |
---|
590 | * None. |
---|
591 | * |
---|
592 | * Side effects: |
---|
593 | * Whatever the interpreter deletion callbacks do. Frees resources |
---|
594 | * used by the interpreter. |
---|
595 | * |
---|
596 | *---------------------------------------------------------------------- |
---|
597 | */ |
---|
598 | |
---|
599 | static void |
---|
600 | DeleteInterpProc(interp) |
---|
601 | Tcl_Interp *interp; /* Interpreter to delete. */ |
---|
602 | { |
---|
603 | Interp *iPtr = (Interp *) interp; |
---|
604 | Tcl_HashEntry *hPtr; |
---|
605 | Tcl_HashSearch search; |
---|
606 | Tcl_HashTable *hTablePtr; |
---|
607 | AssocData *dPtr; |
---|
608 | ResolverScheme *resPtr, *nextResPtr; |
---|
609 | |
---|
610 | /* |
---|
611 | * Punt if there is an error in the Tcl_Release/Tcl_Preserve matchup. |
---|
612 | */ |
---|
613 | |
---|
614 | if (iPtr->numLevels > 0) { |
---|
615 | panic("DeleteInterpProc called with active evals"); |
---|
616 | } |
---|
617 | |
---|
618 | /* |
---|
619 | * The interpreter should already be marked deleted; otherwise how |
---|
620 | * did we get here? |
---|
621 | */ |
---|
622 | |
---|
623 | if (!(iPtr->flags & DELETED)) { |
---|
624 | panic("DeleteInterpProc called on interpreter not marked deleted"); |
---|
625 | } |
---|
626 | |
---|
627 | /* |
---|
628 | * Dismantle everything in the global namespace except for the |
---|
629 | * "errorInfo" and "errorCode" variables. These remain until the |
---|
630 | * namespace is actually destroyed, in case any errors occur. |
---|
631 | * |
---|
632 | * Dismantle the namespace here, before we clear the assocData. If any |
---|
633 | * background errors occur here, they will be deleted below. |
---|
634 | */ |
---|
635 | |
---|
636 | TclTeardownNamespace(iPtr->globalNsPtr); |
---|
637 | |
---|
638 | /* |
---|
639 | * Tear down the math function table. |
---|
640 | */ |
---|
641 | |
---|
642 | for (hPtr = Tcl_FirstHashEntry(&iPtr->mathFuncTable, &search); |
---|
643 | hPtr != NULL; |
---|
644 | hPtr = Tcl_NextHashEntry(&search)) { |
---|
645 | ckfree((char *) Tcl_GetHashValue(hPtr)); |
---|
646 | } |
---|
647 | Tcl_DeleteHashTable(&iPtr->mathFuncTable); |
---|
648 | |
---|
649 | /* |
---|
650 | * Invoke deletion callbacks; note that a callback can create new |
---|
651 | * callbacks, so we iterate. |
---|
652 | */ |
---|
653 | |
---|
654 | while (iPtr->assocData != (Tcl_HashTable *) NULL) { |
---|
655 | hTablePtr = iPtr->assocData; |
---|
656 | iPtr->assocData = (Tcl_HashTable *) NULL; |
---|
657 | for (hPtr = Tcl_FirstHashEntry(hTablePtr, &search); |
---|
658 | hPtr != NULL; |
---|
659 | hPtr = Tcl_FirstHashEntry(hTablePtr, &search)) { |
---|
660 | dPtr = (AssocData *) Tcl_GetHashValue(hPtr); |
---|
661 | Tcl_DeleteHashEntry(hPtr); |
---|
662 | if (dPtr->proc != NULL) { |
---|
663 | (*dPtr->proc)(dPtr->clientData, interp); |
---|
664 | } |
---|
665 | ckfree((char *) dPtr); |
---|
666 | } |
---|
667 | Tcl_DeleteHashTable(hTablePtr); |
---|
668 | ckfree((char *) hTablePtr); |
---|
669 | } |
---|
670 | |
---|
671 | /* |
---|
672 | * Finish deleting the global namespace. |
---|
673 | */ |
---|
674 | |
---|
675 | Tcl_DeleteNamespace((Tcl_Namespace *) iPtr->globalNsPtr); |
---|
676 | |
---|
677 | /* |
---|
678 | * Free up the result *after* deleting variables, since variable |
---|
679 | * deletion could have transferred ownership of the result string |
---|
680 | * to Tcl. |
---|
681 | */ |
---|
682 | |
---|
683 | Tcl_FreeResult(interp); |
---|
684 | interp->result = NULL; |
---|
685 | Tcl_DecrRefCount(iPtr->objResultPtr); |
---|
686 | iPtr->objResultPtr = NULL; |
---|
687 | if (iPtr->errorInfo != NULL) { |
---|
688 | ckfree(iPtr->errorInfo); |
---|
689 | iPtr->errorInfo = NULL; |
---|
690 | } |
---|
691 | if (iPtr->errorCode != NULL) { |
---|
692 | ckfree(iPtr->errorCode); |
---|
693 | iPtr->errorCode = NULL; |
---|
694 | } |
---|
695 | if (iPtr->appendResult != NULL) { |
---|
696 | ckfree(iPtr->appendResult); |
---|
697 | iPtr->appendResult = NULL; |
---|
698 | } |
---|
699 | while (iPtr->tracePtr != NULL) { |
---|
700 | Trace *nextPtr = iPtr->tracePtr->nextPtr; |
---|
701 | |
---|
702 | ckfree((char *) iPtr->tracePtr); |
---|
703 | iPtr->tracePtr = nextPtr; |
---|
704 | } |
---|
705 | if (iPtr->execEnvPtr != NULL) { |
---|
706 | TclDeleteExecEnv(iPtr->execEnvPtr); |
---|
707 | } |
---|
708 | Tcl_DecrRefCount(iPtr->emptyObjPtr); |
---|
709 | iPtr->emptyObjPtr = NULL; |
---|
710 | |
---|
711 | resPtr = iPtr->resolverPtr; |
---|
712 | while (resPtr) { |
---|
713 | nextResPtr = resPtr->nextPtr; |
---|
714 | ckfree(resPtr->name); |
---|
715 | ckfree((char *) resPtr); |
---|
716 | resPtr = nextResPtr; |
---|
717 | } |
---|
718 | |
---|
719 | ckfree((char *) iPtr); |
---|
720 | } |
---|
721 | |
---|
722 | /* |
---|
723 | *---------------------------------------------------------------------- |
---|
724 | * |
---|
725 | * Tcl_InterpDeleted -- |
---|
726 | * |
---|
727 | * Returns nonzero if the interpreter has been deleted with a call |
---|
728 | * to Tcl_DeleteInterp. |
---|
729 | * |
---|
730 | * Results: |
---|
731 | * Nonzero if the interpreter is deleted, zero otherwise. |
---|
732 | * |
---|
733 | * Side effects: |
---|
734 | * None. |
---|
735 | * |
---|
736 | *---------------------------------------------------------------------- |
---|
737 | */ |
---|
738 | |
---|
739 | int |
---|
740 | Tcl_InterpDeleted(interp) |
---|
741 | Tcl_Interp *interp; |
---|
742 | { |
---|
743 | return (((Interp *) interp)->flags & DELETED) ? 1 : 0; |
---|
744 | } |
---|
745 | |
---|
746 | /* |
---|
747 | *---------------------------------------------------------------------- |
---|
748 | * |
---|
749 | * Tcl_DeleteInterp -- |
---|
750 | * |
---|
751 | * Ensures that the interpreter will be deleted eventually. If there |
---|
752 | * are no Tcl_Preserve calls in effect for this interpreter, it is |
---|
753 | * deleted immediately, otherwise the interpreter is deleted when |
---|
754 | * the last Tcl_Preserve is matched by a call to Tcl_Release. In either |
---|
755 | * case, the procedure runs the currently registered deletion callbacks. |
---|
756 | * |
---|
757 | * Results: |
---|
758 | * None. |
---|
759 | * |
---|
760 | * Side effects: |
---|
761 | * The interpreter is marked as deleted. The caller may still use it |
---|
762 | * safely if there are calls to Tcl_Preserve in effect for the |
---|
763 | * interpreter, but further calls to Tcl_Eval etc in this interpreter |
---|
764 | * will fail. |
---|
765 | * |
---|
766 | *---------------------------------------------------------------------- |
---|
767 | */ |
---|
768 | |
---|
769 | void |
---|
770 | Tcl_DeleteInterp(interp) |
---|
771 | Tcl_Interp *interp; /* Token for command interpreter (returned |
---|
772 | * by a previous call to Tcl_CreateInterp). */ |
---|
773 | { |
---|
774 | Interp *iPtr = (Interp *) interp; |
---|
775 | |
---|
776 | /* |
---|
777 | * If the interpreter has already been marked deleted, just punt. |
---|
778 | */ |
---|
779 | |
---|
780 | if (iPtr->flags & DELETED) { |
---|
781 | return; |
---|
782 | } |
---|
783 | |
---|
784 | /* |
---|
785 | * Mark the interpreter as deleted. No further evals will be allowed. |
---|
786 | */ |
---|
787 | |
---|
788 | iPtr->flags |= DELETED; |
---|
789 | |
---|
790 | /* |
---|
791 | * Ensure that the interpreter is eventually deleted. |
---|
792 | */ |
---|
793 | |
---|
794 | Tcl_EventuallyFree((ClientData) interp, |
---|
795 | (Tcl_FreeProc *) DeleteInterpProc); |
---|
796 | } |
---|
797 | |
---|
798 | /* |
---|
799 | *---------------------------------------------------------------------- |
---|
800 | * |
---|
801 | * HiddenCmdsDeleteProc -- |
---|
802 | * |
---|
803 | * Called on interpreter deletion to delete all the hidden |
---|
804 | * commands in an interpreter. |
---|
805 | * |
---|
806 | * Results: |
---|
807 | * None. |
---|
808 | * |
---|
809 | * Side effects: |
---|
810 | * Frees up memory. |
---|
811 | * |
---|
812 | *---------------------------------------------------------------------- |
---|
813 | */ |
---|
814 | |
---|
815 | static void |
---|
816 | HiddenCmdsDeleteProc(clientData, interp) |
---|
817 | ClientData clientData; /* The hidden commands hash table. */ |
---|
818 | Tcl_Interp *interp; /* The interpreter being deleted. */ |
---|
819 | { |
---|
820 | Tcl_HashTable *hiddenCmdTblPtr; |
---|
821 | Tcl_HashEntry *hPtr; |
---|
822 | Tcl_HashSearch hSearch; |
---|
823 | Command *cmdPtr; |
---|
824 | |
---|
825 | hiddenCmdTblPtr = (Tcl_HashTable *) clientData; |
---|
826 | for (hPtr = Tcl_FirstHashEntry(hiddenCmdTblPtr, &hSearch); |
---|
827 | hPtr != NULL; |
---|
828 | hPtr = Tcl_FirstHashEntry(hiddenCmdTblPtr, &hSearch)) { |
---|
829 | |
---|
830 | /* |
---|
831 | * Cannot use Tcl_DeleteCommand because (a) the command is not |
---|
832 | * in the command hash table, and (b) that table has already been |
---|
833 | * deleted above. Hence we emulate what it does, below. |
---|
834 | */ |
---|
835 | |
---|
836 | cmdPtr = (Command *) Tcl_GetHashValue(hPtr); |
---|
837 | |
---|
838 | /* |
---|
839 | * The code here is tricky. We can't delete the hash table entry |
---|
840 | * before invoking the deletion callback because there are cases |
---|
841 | * where the deletion callback needs to invoke the command (e.g. |
---|
842 | * object systems such as OTcl). However, this means that the |
---|
843 | * callback could try to delete or rename the command. The deleted |
---|
844 | * flag allows us to detect these cases and skip nested deletes. |
---|
845 | */ |
---|
846 | |
---|
847 | if (cmdPtr->deleted) { |
---|
848 | |
---|
849 | /* |
---|
850 | * Another deletion is already in progress. Remove the hash |
---|
851 | * table entry now, but don't invoke a callback or free the |
---|
852 | * command structure. |
---|
853 | */ |
---|
854 | |
---|
855 | Tcl_DeleteHashEntry(cmdPtr->hPtr); |
---|
856 | cmdPtr->hPtr = NULL; |
---|
857 | continue; |
---|
858 | } |
---|
859 | cmdPtr->deleted = 1; |
---|
860 | if (cmdPtr->deleteProc != NULL) { |
---|
861 | (*cmdPtr->deleteProc)(cmdPtr->deleteData); |
---|
862 | } |
---|
863 | |
---|
864 | /* |
---|
865 | * Bump the command epoch counter. This will invalidate all cached |
---|
866 | * references that refer to this command. |
---|
867 | */ |
---|
868 | |
---|
869 | cmdPtr->cmdEpoch++; |
---|
870 | |
---|
871 | /* |
---|
872 | * Don't use hPtr to delete the hash entry here, because it's |
---|
873 | * possible that the deletion callback renamed the command. |
---|
874 | * Instead, use cmdPtr->hptr, and make sure that no-one else |
---|
875 | * has already deleted the hash entry. |
---|
876 | */ |
---|
877 | |
---|
878 | if (cmdPtr->hPtr != NULL) { |
---|
879 | Tcl_DeleteHashEntry(cmdPtr->hPtr); |
---|
880 | } |
---|
881 | |
---|
882 | /* |
---|
883 | * Now free the Command structure, unless there is another reference |
---|
884 | * to it from a CmdName Tcl object in some ByteCode code |
---|
885 | * sequence. In that case, delay the cleanup until all references |
---|
886 | * are either discarded (when a ByteCode is freed) or replaced by a |
---|
887 | * new reference (when a cached CmdName Command reference is found |
---|
888 | * to be invalid and TclExecuteByteCode looks up the command in the |
---|
889 | * command hashtable). |
---|
890 | */ |
---|
891 | |
---|
892 | TclCleanupCommand(cmdPtr); |
---|
893 | } |
---|
894 | Tcl_DeleteHashTable(hiddenCmdTblPtr); |
---|
895 | ckfree((char *) hiddenCmdTblPtr); |
---|
896 | } |
---|
897 | |
---|
898 | /* |
---|
899 | *---------------------------------------------------------------------- |
---|
900 | * |
---|
901 | * Tcl_HideCommand -- |
---|
902 | * |
---|
903 | * Makes a command hidden so that it cannot be invoked from within |
---|
904 | * an interpreter, only from within an ancestor. |
---|
905 | * |
---|
906 | * Results: |
---|
907 | * A standard Tcl result; also leaves a message in interp->result |
---|
908 | * if an error occurs. |
---|
909 | * |
---|
910 | * Side effects: |
---|
911 | * Removes a command from the command table and create an entry |
---|
912 | * into the hidden command table under the specified token name. |
---|
913 | * |
---|
914 | *---------------------------------------------------------------------- |
---|
915 | */ |
---|
916 | |
---|
917 | int |
---|
918 | Tcl_HideCommand(interp, cmdName, hiddenCmdToken) |
---|
919 | Tcl_Interp *interp; /* Interpreter in which to hide command. */ |
---|
920 | char *cmdName; /* Name of command to hide. */ |
---|
921 | char *hiddenCmdToken; /* Token name of the to-be-hidden command. */ |
---|
922 | { |
---|
923 | Interp *iPtr = (Interp *) interp; |
---|
924 | Tcl_Command cmd; |
---|
925 | Command *cmdPtr; |
---|
926 | Tcl_HashTable *hTblPtr; |
---|
927 | Tcl_HashEntry *hPtr; |
---|
928 | int new; |
---|
929 | |
---|
930 | if (iPtr->flags & DELETED) { |
---|
931 | |
---|
932 | /* |
---|
933 | * The interpreter is being deleted. Do not create any new |
---|
934 | * structures, because it is not safe to modify the interpreter. |
---|
935 | */ |
---|
936 | |
---|
937 | return TCL_ERROR; |
---|
938 | } |
---|
939 | |
---|
940 | /* |
---|
941 | * Disallow hiding of commands that are currently in a namespace or |
---|
942 | * renaming (as part of hiding) into a namespace. |
---|
943 | * |
---|
944 | * (because the current implementation with a single global table |
---|
945 | * and the needed uniqueness of names cause problems with namespaces) |
---|
946 | * |
---|
947 | * we don't need to check for "::" in cmdName because the real check is |
---|
948 | * on the nsPtr below. |
---|
949 | * |
---|
950 | * hiddenCmdToken is just a string which is not interpreted in any way. |
---|
951 | * It may contain :: but the string is not interpreted as a namespace |
---|
952 | * qualifier command name. Thus, hiding foo::bar to foo::bar and then |
---|
953 | * trying to expose or invoke ::foo::bar will NOT work; but if the |
---|
954 | * application always uses the same strings it will get consistent |
---|
955 | * behaviour. |
---|
956 | * |
---|
957 | * But as we currently limit ourselves to the global namespace only |
---|
958 | * for the source, in order to avoid potential confusion, |
---|
959 | * lets prevent "::" in the token too. --dl |
---|
960 | */ |
---|
961 | |
---|
962 | if (strstr(hiddenCmdToken, "::") != NULL) { |
---|
963 | Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
---|
964 | "cannot use namespace qualifiers as hidden command", |
---|
965 | "token (rename)", (char *) NULL); |
---|
966 | return TCL_ERROR; |
---|
967 | } |
---|
968 | |
---|
969 | /* |
---|
970 | * Find the command to hide. An error is returned if cmdName can't |
---|
971 | * be found. Look up the command only from the global namespace. |
---|
972 | * Full path of the command must be given if using namespaces. |
---|
973 | */ |
---|
974 | |
---|
975 | cmd = Tcl_FindCommand(interp, cmdName, (Tcl_Namespace *) NULL, |
---|
976 | /*flags*/ TCL_LEAVE_ERR_MSG | TCL_GLOBAL_ONLY); |
---|
977 | if (cmd == (Tcl_Command) NULL) { |
---|
978 | return TCL_ERROR; |
---|
979 | } |
---|
980 | cmdPtr = (Command *) cmd; |
---|
981 | |
---|
982 | /* |
---|
983 | * Check that the command is really in global namespace |
---|
984 | */ |
---|
985 | |
---|
986 | if ( cmdPtr->nsPtr != iPtr->globalNsPtr ) { |
---|
987 | Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
---|
988 | "can only hide global namespace commands", |
---|
989 | " (use rename then hide)", (char *) NULL); |
---|
990 | return TCL_ERROR; |
---|
991 | } |
---|
992 | |
---|
993 | /* |
---|
994 | * Initialize the hidden command table if necessary. |
---|
995 | */ |
---|
996 | |
---|
997 | hTblPtr = (Tcl_HashTable *) Tcl_GetAssocData(interp, "tclHiddenCmds", |
---|
998 | NULL); |
---|
999 | if (hTblPtr == (Tcl_HashTable *) NULL) { |
---|
1000 | hTblPtr = (Tcl_HashTable *) |
---|
1001 | ckalloc((unsigned) sizeof(Tcl_HashTable)); |
---|
1002 | Tcl_InitHashTable(hTblPtr, TCL_STRING_KEYS); |
---|
1003 | Tcl_SetAssocData(interp, "tclHiddenCmds", HiddenCmdsDeleteProc, |
---|
1004 | (ClientData) hTblPtr); |
---|
1005 | } |
---|
1006 | |
---|
1007 | /* |
---|
1008 | * It is an error to move an exposed command to a hidden command with |
---|
1009 | * hiddenCmdToken if a hidden command with the name hiddenCmdToken already |
---|
1010 | * exists. |
---|
1011 | */ |
---|
1012 | |
---|
1013 | hPtr = Tcl_CreateHashEntry(hTblPtr, hiddenCmdToken, &new); |
---|
1014 | if (!new) { |
---|
1015 | Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
---|
1016 | "hidden command named \"", hiddenCmdToken, "\" already exists", |
---|
1017 | (char *) NULL); |
---|
1018 | return TCL_ERROR; |
---|
1019 | } |
---|
1020 | |
---|
1021 | /* |
---|
1022 | * Nb : This code is currently 'like' a rename to a specialy set apart |
---|
1023 | * name table. Changes here and in TclRenameCommand must |
---|
1024 | * be kept in synch untill the common parts are actually |
---|
1025 | * factorized out. |
---|
1026 | */ |
---|
1027 | |
---|
1028 | /* |
---|
1029 | * Remove the hash entry for the command from the interpreter command |
---|
1030 | * table. This is like deleting the command, so bump its command epoch; |
---|
1031 | * this invalidates any cached references that point to the command. |
---|
1032 | */ |
---|
1033 | |
---|
1034 | if (cmdPtr->hPtr != NULL) { |
---|
1035 | Tcl_DeleteHashEntry(cmdPtr->hPtr); |
---|
1036 | cmdPtr->hPtr = (Tcl_HashEntry *) NULL; |
---|
1037 | cmdPtr->cmdEpoch++; |
---|
1038 | } |
---|
1039 | |
---|
1040 | /* |
---|
1041 | * Now link the hash table entry with the command structure. |
---|
1042 | * We ensured above that the nsPtr was right. |
---|
1043 | */ |
---|
1044 | |
---|
1045 | cmdPtr->hPtr = hPtr; |
---|
1046 | Tcl_SetHashValue(hPtr, (ClientData) cmdPtr); |
---|
1047 | |
---|
1048 | /* |
---|
1049 | * If the command being hidden has a compile procedure, increment the |
---|
1050 | * interpreter's compileEpoch to invalidate its compiled code. This |
---|
1051 | * makes sure that we don't later try to execute old code compiled with |
---|
1052 | * command-specific (i.e., inline) bytecodes for the now-hidden |
---|
1053 | * command. This field is checked in Tcl_EvalObj and ObjInterpProc, |
---|
1054 | * and code whose compilation epoch doesn't match is recompiled. |
---|
1055 | */ |
---|
1056 | |
---|
1057 | if (cmdPtr->compileProc != NULL) { |
---|
1058 | iPtr->compileEpoch++; |
---|
1059 | } |
---|
1060 | return TCL_OK; |
---|
1061 | } |
---|
1062 | |
---|
1063 | /* |
---|
1064 | *---------------------------------------------------------------------- |
---|
1065 | * |
---|
1066 | * Tcl_ExposeCommand -- |
---|
1067 | * |
---|
1068 | * Makes a previously hidden command callable from inside the |
---|
1069 | * interpreter instead of only by its ancestors. |
---|
1070 | * |
---|
1071 | * Results: |
---|
1072 | * A standard Tcl result. If an error occurs, a message is left |
---|
1073 | * in interp->result. |
---|
1074 | * |
---|
1075 | * Side effects: |
---|
1076 | * Moves commands from one hash table to another. |
---|
1077 | * |
---|
1078 | *---------------------------------------------------------------------- |
---|
1079 | */ |
---|
1080 | |
---|
1081 | int |
---|
1082 | Tcl_ExposeCommand(interp, hiddenCmdToken, cmdName) |
---|
1083 | Tcl_Interp *interp; /* Interpreter in which to make command |
---|
1084 | * callable. */ |
---|
1085 | char *hiddenCmdToken; /* Name of hidden command. */ |
---|
1086 | char *cmdName; /* Name of to-be-exposed command. */ |
---|
1087 | { |
---|
1088 | Interp *iPtr = (Interp *) interp; |
---|
1089 | Command *cmdPtr; |
---|
1090 | Namespace *nsPtr; |
---|
1091 | Tcl_HashEntry *hPtr; |
---|
1092 | Tcl_HashTable *hTblPtr; |
---|
1093 | int new; |
---|
1094 | |
---|
1095 | if (iPtr->flags & DELETED) { |
---|
1096 | /* |
---|
1097 | * The interpreter is being deleted. Do not create any new |
---|
1098 | * structures, because it is not safe to modify the interpreter. |
---|
1099 | */ |
---|
1100 | |
---|
1101 | return TCL_ERROR; |
---|
1102 | } |
---|
1103 | |
---|
1104 | /* |
---|
1105 | * Check that we have a regular name for the command |
---|
1106 | * (that the user is not trying to do an expose and a rename |
---|
1107 | * (to another namespace) at the same time) |
---|
1108 | */ |
---|
1109 | |
---|
1110 | if (strstr(cmdName, "::") != NULL) { |
---|
1111 | Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
---|
1112 | "can not expose to a namespace ", |
---|
1113 | "(use expose to toplevel, then rename)", |
---|
1114 | (char *) NULL); |
---|
1115 | return TCL_ERROR; |
---|
1116 | } |
---|
1117 | |
---|
1118 | /* |
---|
1119 | * Find the hash table for the hidden commands; error out if there |
---|
1120 | * is none. |
---|
1121 | */ |
---|
1122 | |
---|
1123 | hTblPtr = (Tcl_HashTable *) Tcl_GetAssocData(interp, "tclHiddenCmds", |
---|
1124 | NULL); |
---|
1125 | if (hTblPtr == NULL) { |
---|
1126 | Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
---|
1127 | "unknown hidden command \"", hiddenCmdToken, |
---|
1128 | "\"", (char *) NULL); |
---|
1129 | return TCL_ERROR; |
---|
1130 | } |
---|
1131 | |
---|
1132 | /* |
---|
1133 | * Get the command from the hidden command table: |
---|
1134 | */ |
---|
1135 | |
---|
1136 | hPtr = Tcl_FindHashEntry(hTblPtr, hiddenCmdToken); |
---|
1137 | if (hPtr == (Tcl_HashEntry *) NULL) { |
---|
1138 | Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
---|
1139 | "unknown hidden command \"", hiddenCmdToken, |
---|
1140 | "\"", (char *) NULL); |
---|
1141 | return TCL_ERROR; |
---|
1142 | } |
---|
1143 | cmdPtr = (Command *) Tcl_GetHashValue(hPtr); |
---|
1144 | |
---|
1145 | |
---|
1146 | /* |
---|
1147 | * Check that we have a true global namespace |
---|
1148 | * command (enforced by Tcl_HideCommand() but let's double |
---|
1149 | * check. (If it was not, we would not really know how to |
---|
1150 | * handle it). |
---|
1151 | */ |
---|
1152 | if ( cmdPtr->nsPtr != iPtr->globalNsPtr ) { |
---|
1153 | /* |
---|
1154 | * This case is theoritically impossible, |
---|
1155 | * we might rather panic() than 'nicely' erroring out ? |
---|
1156 | */ |
---|
1157 | Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
---|
1158 | "trying to expose a non global command name space command", |
---|
1159 | (char *) NULL); |
---|
1160 | return TCL_ERROR; |
---|
1161 | } |
---|
1162 | |
---|
1163 | /* This is the global table */ |
---|
1164 | nsPtr = cmdPtr->nsPtr; |
---|
1165 | |
---|
1166 | /* |
---|
1167 | * It is an error to overwrite an existing exposed command as a result |
---|
1168 | * of exposing a previously hidden command. |
---|
1169 | */ |
---|
1170 | |
---|
1171 | hPtr = Tcl_CreateHashEntry(&nsPtr->cmdTable, cmdName, &new); |
---|
1172 | if (!new) { |
---|
1173 | Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
---|
1174 | "exposed command \"", cmdName, |
---|
1175 | "\" already exists", (char *) NULL); |
---|
1176 | return TCL_ERROR; |
---|
1177 | } |
---|
1178 | |
---|
1179 | /* |
---|
1180 | * Remove the hash entry for the command from the interpreter hidden |
---|
1181 | * command table. |
---|
1182 | */ |
---|
1183 | |
---|
1184 | if (cmdPtr->hPtr != NULL) { |
---|
1185 | Tcl_DeleteHashEntry(cmdPtr->hPtr); |
---|
1186 | cmdPtr->hPtr = NULL; |
---|
1187 | } |
---|
1188 | |
---|
1189 | /* |
---|
1190 | * Now link the hash table entry with the command structure. |
---|
1191 | * This is like creating a new command, so deal with any shadowing |
---|
1192 | * of commands in the global namespace. |
---|
1193 | */ |
---|
1194 | |
---|
1195 | cmdPtr->hPtr = hPtr; |
---|
1196 | |
---|
1197 | Tcl_SetHashValue(hPtr, (ClientData) cmdPtr); |
---|
1198 | |
---|
1199 | /* |
---|
1200 | * Not needed as we are only in the global namespace |
---|
1201 | * (but would be needed again if we supported namespace command hiding) |
---|
1202 | * |
---|
1203 | * TclResetShadowedCmdRefs(interp, cmdPtr); |
---|
1204 | */ |
---|
1205 | |
---|
1206 | |
---|
1207 | /* |
---|
1208 | * If the command being exposed has a compile procedure, increment |
---|
1209 | * interpreter's compileEpoch to invalidate its compiled code. This |
---|
1210 | * makes sure that we don't later try to execute old code compiled |
---|
1211 | * assuming the command is hidden. This field is checked in Tcl_EvalObj |
---|
1212 | * and ObjInterpProc, and code whose compilation epoch doesn't match is |
---|
1213 | * recompiled. |
---|
1214 | */ |
---|
1215 | |
---|
1216 | if (cmdPtr->compileProc != NULL) { |
---|
1217 | iPtr->compileEpoch++; |
---|
1218 | } |
---|
1219 | return TCL_OK; |
---|
1220 | } |
---|
1221 | |
---|
1222 | /* |
---|
1223 | *---------------------------------------------------------------------- |
---|
1224 | * |
---|
1225 | * Tcl_CreateCommand -- |
---|
1226 | * |
---|
1227 | * Define a new command in a command table. |
---|
1228 | * |
---|
1229 | * Results: |
---|
1230 | * The return value is a token for the command, which can |
---|
1231 | * be used in future calls to Tcl_GetCommandName. |
---|
1232 | * |
---|
1233 | * Side effects: |
---|
1234 | * If a command named cmdName already exists for interp, it is deleted. |
---|
1235 | * In the future, when cmdName is seen as the name of a command by |
---|
1236 | * Tcl_Eval, proc will be called. To support the bytecode interpreter, |
---|
1237 | * the command is created with a wrapper Tcl_ObjCmdProc |
---|
1238 | * (TclInvokeStringCommand) that eventially calls proc. When the |
---|
1239 | * command is deleted from the table, deleteProc will be called. |
---|
1240 | * See the manual entry for details on the calling sequence. |
---|
1241 | * |
---|
1242 | *---------------------------------------------------------------------- |
---|
1243 | */ |
---|
1244 | |
---|
1245 | Tcl_Command |
---|
1246 | Tcl_CreateCommand(interp, cmdName, proc, clientData, deleteProc) |
---|
1247 | Tcl_Interp *interp; /* Token for command interpreter returned by |
---|
1248 | * a previous call to Tcl_CreateInterp. */ |
---|
1249 | char *cmdName; /* Name of command. If it contains namespace |
---|
1250 | * qualifiers, the new command is put in the |
---|
1251 | * specified namespace; otherwise it is put |
---|
1252 | * in the global namespace. */ |
---|
1253 | Tcl_CmdProc *proc; /* Procedure to associate with cmdName. */ |
---|
1254 | ClientData clientData; /* Arbitrary value passed to string proc. */ |
---|
1255 | Tcl_CmdDeleteProc *deleteProc; |
---|
1256 | /* If not NULL, gives a procedure to call |
---|
1257 | * when this command is deleted. */ |
---|
1258 | { |
---|
1259 | Interp *iPtr = (Interp *) interp; |
---|
1260 | ImportRef *oldRefPtr = NULL; |
---|
1261 | Namespace *nsPtr, *dummy1, *dummy2; |
---|
1262 | Command *cmdPtr, *refCmdPtr; |
---|
1263 | Tcl_HashEntry *hPtr; |
---|
1264 | char *tail; |
---|
1265 | int new; |
---|
1266 | ImportedCmdData *dataPtr; |
---|
1267 | |
---|
1268 | if (iPtr->flags & DELETED) { |
---|
1269 | /* |
---|
1270 | * The interpreter is being deleted. Don't create any new |
---|
1271 | * commands; it's not safe to muck with the interpreter anymore. |
---|
1272 | */ |
---|
1273 | |
---|
1274 | return (Tcl_Command) NULL; |
---|
1275 | } |
---|
1276 | |
---|
1277 | /* |
---|
1278 | * Determine where the command should reside. If its name contains |
---|
1279 | * namespace qualifiers, we put it in the specified namespace; |
---|
1280 | * otherwise, we always put it in the global namespace. |
---|
1281 | */ |
---|
1282 | |
---|
1283 | if (strstr(cmdName, "::") != NULL) { |
---|
1284 | TclGetNamespaceForQualName(interp, cmdName, (Namespace *) NULL, |
---|
1285 | CREATE_NS_IF_UNKNOWN, &nsPtr, &dummy1, &dummy2, &tail); |
---|
1286 | if ((nsPtr == NULL) || (tail == NULL)) { |
---|
1287 | return (Tcl_Command) NULL; |
---|
1288 | } |
---|
1289 | } else { |
---|
1290 | nsPtr = iPtr->globalNsPtr; |
---|
1291 | tail = cmdName; |
---|
1292 | } |
---|
1293 | |
---|
1294 | hPtr = Tcl_CreateHashEntry(&nsPtr->cmdTable, tail, &new); |
---|
1295 | if (!new) { |
---|
1296 | /* |
---|
1297 | * Command already exists. Delete the old one. |
---|
1298 | * Be careful to preserve any existing import links so we can |
---|
1299 | * restore them down below. That way, you can redefine a |
---|
1300 | * command and its import status will remain intact. |
---|
1301 | */ |
---|
1302 | |
---|
1303 | cmdPtr = (Command *) Tcl_GetHashValue(hPtr); |
---|
1304 | oldRefPtr = cmdPtr->importRefPtr; |
---|
1305 | cmdPtr->importRefPtr = NULL; |
---|
1306 | |
---|
1307 | Tcl_DeleteCommandFromToken(interp, (Tcl_Command) cmdPtr); |
---|
1308 | hPtr = Tcl_CreateHashEntry(&nsPtr->cmdTable, tail, &new); |
---|
1309 | if (!new) { |
---|
1310 | /* |
---|
1311 | * If the deletion callback recreated the command, just throw |
---|
1312 | * away the new command (if we try to delete it again, we |
---|
1313 | * could get stuck in an infinite loop). |
---|
1314 | */ |
---|
1315 | |
---|
1316 | ckfree((char*) cmdPtr); |
---|
1317 | } |
---|
1318 | } |
---|
1319 | cmdPtr = (Command *) ckalloc(sizeof(Command)); |
---|
1320 | Tcl_SetHashValue(hPtr, cmdPtr); |
---|
1321 | cmdPtr->hPtr = hPtr; |
---|
1322 | cmdPtr->nsPtr = nsPtr; |
---|
1323 | cmdPtr->refCount = 1; |
---|
1324 | cmdPtr->cmdEpoch = 0; |
---|
1325 | cmdPtr->compileProc = (CompileProc *) NULL; |
---|
1326 | cmdPtr->objProc = TclInvokeStringCommand; |
---|
1327 | cmdPtr->objClientData = (ClientData) cmdPtr; |
---|
1328 | cmdPtr->proc = proc; |
---|
1329 | cmdPtr->clientData = clientData; |
---|
1330 | cmdPtr->deleteProc = deleteProc; |
---|
1331 | cmdPtr->deleteData = clientData; |
---|
1332 | cmdPtr->deleted = 0; |
---|
1333 | cmdPtr->importRefPtr = NULL; |
---|
1334 | |
---|
1335 | /* |
---|
1336 | * Plug in any existing import references found above. Be sure |
---|
1337 | * to update all of these references to point to the new command. |
---|
1338 | */ |
---|
1339 | |
---|
1340 | if (oldRefPtr != NULL) { |
---|
1341 | cmdPtr->importRefPtr = oldRefPtr; |
---|
1342 | while (oldRefPtr != NULL) { |
---|
1343 | refCmdPtr = oldRefPtr->importedCmdPtr; |
---|
1344 | dataPtr = (ImportedCmdData*)refCmdPtr->objClientData; |
---|
1345 | dataPtr->realCmdPtr = cmdPtr; |
---|
1346 | oldRefPtr = oldRefPtr->nextPtr; |
---|
1347 | } |
---|
1348 | } |
---|
1349 | |
---|
1350 | /* |
---|
1351 | * We just created a command, so in its namespace and all of its parent |
---|
1352 | * namespaces, it may shadow global commands with the same name. If any |
---|
1353 | * shadowed commands are found, invalidate all cached command references |
---|
1354 | * in the affected namespaces. |
---|
1355 | */ |
---|
1356 | |
---|
1357 | TclResetShadowedCmdRefs(interp, cmdPtr); |
---|
1358 | return (Tcl_Command) cmdPtr; |
---|
1359 | } |
---|
1360 | |
---|
1361 | /* |
---|
1362 | *---------------------------------------------------------------------- |
---|
1363 | * |
---|
1364 | * Tcl_CreateObjCommand -- |
---|
1365 | * |
---|
1366 | * Define a new object-based command in a command table. |
---|
1367 | * |
---|
1368 | * Results: |
---|
1369 | * The return value is a token for the command, which can |
---|
1370 | * be used in future calls to Tcl_NameOfCommand. |
---|
1371 | * |
---|
1372 | * Side effects: |
---|
1373 | * If no command named "cmdName" already exists for interp, one is |
---|
1374 | * created. Otherwise, if a command does exist, then if the |
---|
1375 | * object-based Tcl_ObjCmdProc is TclInvokeStringCommand, we assume |
---|
1376 | * Tcl_CreateCommand was called previously for the same command and |
---|
1377 | * just set its Tcl_ObjCmdProc to the argument "proc"; otherwise, we |
---|
1378 | * delete the old command. |
---|
1379 | * |
---|
1380 | * In the future, during bytecode evaluation when "cmdName" is seen as |
---|
1381 | * the name of a command by Tcl_EvalObj or Tcl_Eval, the object-based |
---|
1382 | * Tcl_ObjCmdProc proc will be called. When the command is deleted from |
---|
1383 | * the table, deleteProc will be called. See the manual entry for |
---|
1384 | * details on the calling sequence. |
---|
1385 | * |
---|
1386 | *---------------------------------------------------------------------- |
---|
1387 | */ |
---|
1388 | |
---|
1389 | Tcl_Command |
---|
1390 | Tcl_CreateObjCommand(interp, cmdName, proc, clientData, deleteProc) |
---|
1391 | Tcl_Interp *interp; /* Token for command interpreter (returned |
---|
1392 | * by previous call to Tcl_CreateInterp). */ |
---|
1393 | char *cmdName; /* Name of command. If it contains namespace |
---|
1394 | * qualifiers, the new command is put in the |
---|
1395 | * specified namespace; otherwise it is put |
---|
1396 | * in the global namespace. */ |
---|
1397 | Tcl_ObjCmdProc *proc; /* Object-based procedure to associate with |
---|
1398 | * name. */ |
---|
1399 | ClientData clientData; /* Arbitrary value to pass to object |
---|
1400 | * procedure. */ |
---|
1401 | Tcl_CmdDeleteProc *deleteProc; |
---|
1402 | /* If not NULL, gives a procedure to call |
---|
1403 | * when this command is deleted. */ |
---|
1404 | { |
---|
1405 | Interp *iPtr = (Interp *) interp; |
---|
1406 | ImportRef *oldRefPtr = NULL; |
---|
1407 | Namespace *nsPtr, *dummy1, *dummy2; |
---|
1408 | Command *cmdPtr, *refCmdPtr; |
---|
1409 | Tcl_HashEntry *hPtr; |
---|
1410 | char *tail; |
---|
1411 | int new; |
---|
1412 | ImportedCmdData *dataPtr; |
---|
1413 | |
---|
1414 | if (iPtr->flags & DELETED) { |
---|
1415 | /* |
---|
1416 | * The interpreter is being deleted. Don't create any new |
---|
1417 | * commands; it's not safe to muck with the interpreter anymore. |
---|
1418 | */ |
---|
1419 | |
---|
1420 | return (Tcl_Command) NULL; |
---|
1421 | } |
---|
1422 | |
---|
1423 | /* |
---|
1424 | * Determine where the command should reside. If its name contains |
---|
1425 | * namespace qualifiers, we put it in the specified namespace; |
---|
1426 | * otherwise, we always put it in the global namespace. |
---|
1427 | */ |
---|
1428 | |
---|
1429 | if (strstr(cmdName, "::") != NULL) { |
---|
1430 | TclGetNamespaceForQualName(interp, cmdName, (Namespace *) NULL, |
---|
1431 | CREATE_NS_IF_UNKNOWN, &nsPtr, &dummy1, &dummy2, &tail); |
---|
1432 | if ((nsPtr == NULL) || (tail == NULL)) { |
---|
1433 | return (Tcl_Command) NULL; |
---|
1434 | } |
---|
1435 | } else { |
---|
1436 | nsPtr = iPtr->globalNsPtr; |
---|
1437 | tail = cmdName; |
---|
1438 | } |
---|
1439 | |
---|
1440 | hPtr = Tcl_CreateHashEntry(&nsPtr->cmdTable, tail, &new); |
---|
1441 | if (!new) { |
---|
1442 | cmdPtr = (Command *) Tcl_GetHashValue(hPtr); |
---|
1443 | |
---|
1444 | /* |
---|
1445 | * Command already exists. If its object-based Tcl_ObjCmdProc is |
---|
1446 | * TclInvokeStringCommand, we just set its Tcl_ObjCmdProc to the |
---|
1447 | * argument "proc". Otherwise, we delete the old command. |
---|
1448 | */ |
---|
1449 | |
---|
1450 | if (cmdPtr->objProc == TclInvokeStringCommand) { |
---|
1451 | cmdPtr->objProc = proc; |
---|
1452 | cmdPtr->objClientData = clientData; |
---|
1453 | cmdPtr->deleteProc = deleteProc; |
---|
1454 | cmdPtr->deleteData = clientData; |
---|
1455 | return (Tcl_Command) cmdPtr; |
---|
1456 | } |
---|
1457 | |
---|
1458 | /* |
---|
1459 | * Otherwise, we delete the old command. Be careful to preserve |
---|
1460 | * any existing import links so we can restore them down below. |
---|
1461 | * That way, you can redefine a command and its import status |
---|
1462 | * will remain intact. |
---|
1463 | */ |
---|
1464 | |
---|
1465 | oldRefPtr = cmdPtr->importRefPtr; |
---|
1466 | cmdPtr->importRefPtr = NULL; |
---|
1467 | |
---|
1468 | Tcl_DeleteCommandFromToken(interp, (Tcl_Command) cmdPtr); |
---|
1469 | hPtr = Tcl_CreateHashEntry(&nsPtr->cmdTable, tail, &new); |
---|
1470 | if (!new) { |
---|
1471 | /* |
---|
1472 | * If the deletion callback recreated the command, just throw |
---|
1473 | * away the new command (if we try to delete it again, we |
---|
1474 | * could get stuck in an infinite loop). |
---|
1475 | */ |
---|
1476 | |
---|
1477 | ckfree((char *) Tcl_GetHashValue(hPtr)); |
---|
1478 | } |
---|
1479 | } |
---|
1480 | cmdPtr = (Command *) ckalloc(sizeof(Command)); |
---|
1481 | Tcl_SetHashValue(hPtr, cmdPtr); |
---|
1482 | cmdPtr->hPtr = hPtr; |
---|
1483 | cmdPtr->nsPtr = nsPtr; |
---|
1484 | cmdPtr->refCount = 1; |
---|
1485 | cmdPtr->cmdEpoch = 0; |
---|
1486 | cmdPtr->compileProc = (CompileProc *) NULL; |
---|
1487 | cmdPtr->objProc = proc; |
---|
1488 | cmdPtr->objClientData = clientData; |
---|
1489 | cmdPtr->proc = TclInvokeObjectCommand; |
---|
1490 | cmdPtr->clientData = (ClientData) cmdPtr; |
---|
1491 | cmdPtr->deleteProc = deleteProc; |
---|
1492 | cmdPtr->deleteData = clientData; |
---|
1493 | cmdPtr->deleted = 0; |
---|
1494 | cmdPtr->importRefPtr = NULL; |
---|
1495 | |
---|
1496 | /* |
---|
1497 | * Plug in any existing import references found above. Be sure |
---|
1498 | * to update all of these references to point to the new command. |
---|
1499 | */ |
---|
1500 | |
---|
1501 | if (oldRefPtr != NULL) { |
---|
1502 | cmdPtr->importRefPtr = oldRefPtr; |
---|
1503 | while (oldRefPtr != NULL) { |
---|
1504 | refCmdPtr = oldRefPtr->importedCmdPtr; |
---|
1505 | dataPtr = (ImportedCmdData*)refCmdPtr->objClientData; |
---|
1506 | dataPtr->realCmdPtr = cmdPtr; |
---|
1507 | oldRefPtr = oldRefPtr->nextPtr; |
---|
1508 | } |
---|
1509 | } |
---|
1510 | |
---|
1511 | /* |
---|
1512 | * We just created a command, so in its namespace and all of its parent |
---|
1513 | * namespaces, it may shadow global commands with the same name. If any |
---|
1514 | * shadowed commands are found, invalidate all cached command references |
---|
1515 | * in the affected namespaces. |
---|
1516 | */ |
---|
1517 | |
---|
1518 | TclResetShadowedCmdRefs(interp, cmdPtr); |
---|
1519 | return (Tcl_Command) cmdPtr; |
---|
1520 | } |
---|
1521 | |
---|
1522 | /* |
---|
1523 | *---------------------------------------------------------------------- |
---|
1524 | * |
---|
1525 | * TclInvokeStringCommand -- |
---|
1526 | * |
---|
1527 | * "Wrapper" Tcl_ObjCmdProc used to call an existing string-based |
---|
1528 | * Tcl_CmdProc if no object-based procedure exists for a command. A |
---|
1529 | * pointer to this procedure is stored as the Tcl_ObjCmdProc in a |
---|
1530 | * Command structure. It simply turns around and calls the string |
---|
1531 | * Tcl_CmdProc in the Command structure. |
---|
1532 | * |
---|
1533 | * Results: |
---|
1534 | * A standard Tcl object result value. |
---|
1535 | * |
---|
1536 | * Side effects: |
---|
1537 | * Besides those side effects of the called Tcl_CmdProc, |
---|
1538 | * TclInvokeStringCommand allocates and frees storage. |
---|
1539 | * |
---|
1540 | *---------------------------------------------------------------------- |
---|
1541 | */ |
---|
1542 | |
---|
1543 | int |
---|
1544 | TclInvokeStringCommand(clientData, interp, objc, objv) |
---|
1545 | ClientData clientData; /* Points to command's Command structure. */ |
---|
1546 | Tcl_Interp *interp; /* Current interpreter. */ |
---|
1547 | register int objc; /* Number of arguments. */ |
---|
1548 | Tcl_Obj *CONST objv[]; /* Argument objects. */ |
---|
1549 | { |
---|
1550 | register Command *cmdPtr = (Command *) clientData; |
---|
1551 | register int i; |
---|
1552 | int result; |
---|
1553 | |
---|
1554 | /* |
---|
1555 | * This procedure generates an argv array for the string arguments. It |
---|
1556 | * starts out with stack-allocated space but uses dynamically-allocated |
---|
1557 | * storage if needed. |
---|
1558 | */ |
---|
1559 | |
---|
1560 | #define NUM_ARGS 20 |
---|
1561 | char *(argStorage[NUM_ARGS]); |
---|
1562 | char **argv = argStorage; |
---|
1563 | |
---|
1564 | /* |
---|
1565 | * Create the string argument array "argv". Make sure argv is large |
---|
1566 | * enough to hold the objc arguments plus 1 extra for the zero |
---|
1567 | * end-of-argv word. |
---|
1568 | * THIS FAILS IF ANY ARGUMENT OBJECT CONTAINS AN EMBEDDED NULL. |
---|
1569 | */ |
---|
1570 | |
---|
1571 | if ((objc + 1) > NUM_ARGS) { |
---|
1572 | argv = (char **) ckalloc((unsigned)(objc + 1) * sizeof(char *)); |
---|
1573 | } |
---|
1574 | |
---|
1575 | for (i = 0; i < objc; i++) { |
---|
1576 | argv[i] = Tcl_GetStringFromObj(objv[i], (int *) NULL); |
---|
1577 | } |
---|
1578 | argv[objc] = 0; |
---|
1579 | |
---|
1580 | /* |
---|
1581 | * Invoke the command's string-based Tcl_CmdProc. |
---|
1582 | */ |
---|
1583 | |
---|
1584 | result = (*cmdPtr->proc)(cmdPtr->clientData, interp, objc, argv); |
---|
1585 | |
---|
1586 | /* |
---|
1587 | * Free the argv array if malloc'ed storage was used. |
---|
1588 | */ |
---|
1589 | |
---|
1590 | if (argv != argStorage) { |
---|
1591 | ckfree((char *) argv); |
---|
1592 | } |
---|
1593 | return result; |
---|
1594 | #undef NUM_ARGS |
---|
1595 | } |
---|
1596 | |
---|
1597 | /* |
---|
1598 | *---------------------------------------------------------------------- |
---|
1599 | * |
---|
1600 | * TclInvokeObjectCommand -- |
---|
1601 | * |
---|
1602 | * "Wrapper" Tcl_CmdProc used to call an existing object-based |
---|
1603 | * Tcl_ObjCmdProc if no string-based procedure exists for a command. |
---|
1604 | * A pointer to this procedure is stored as the Tcl_CmdProc in a |
---|
1605 | * Command structure. It simply turns around and calls the object |
---|
1606 | * Tcl_ObjCmdProc in the Command structure. |
---|
1607 | * |
---|
1608 | * Results: |
---|
1609 | * A standard Tcl string result value. |
---|
1610 | * |
---|
1611 | * Side effects: |
---|
1612 | * Besides those side effects of the called Tcl_CmdProc, |
---|
1613 | * TclInvokeStringCommand allocates and frees storage. |
---|
1614 | * |
---|
1615 | *---------------------------------------------------------------------- |
---|
1616 | */ |
---|
1617 | |
---|
1618 | int |
---|
1619 | TclInvokeObjectCommand(clientData, interp, argc, argv) |
---|
1620 | ClientData clientData; /* Points to command's Command structure. */ |
---|
1621 | Tcl_Interp *interp; /* Current interpreter. */ |
---|
1622 | int argc; /* Number of arguments. */ |
---|
1623 | register char **argv; /* Argument strings. */ |
---|
1624 | { |
---|
1625 | Command *cmdPtr = (Command *) clientData; |
---|
1626 | register Tcl_Obj *objPtr; |
---|
1627 | register int i; |
---|
1628 | int length, result; |
---|
1629 | |
---|
1630 | /* |
---|
1631 | * This procedure generates an objv array for object arguments that hold |
---|
1632 | * the argv strings. It starts out with stack-allocated space but uses |
---|
1633 | * dynamically-allocated storage if needed. |
---|
1634 | */ |
---|
1635 | |
---|
1636 | #define NUM_ARGS 20 |
---|
1637 | Tcl_Obj *(argStorage[NUM_ARGS]); |
---|
1638 | register Tcl_Obj **objv = argStorage; |
---|
1639 | |
---|
1640 | /* |
---|
1641 | * Create the object argument array "objv". Make sure objv is large |
---|
1642 | * enough to hold the objc arguments plus 1 extra for the zero |
---|
1643 | * end-of-objv word. |
---|
1644 | */ |
---|
1645 | |
---|
1646 | if ((argc + 1) > NUM_ARGS) { |
---|
1647 | objv = (Tcl_Obj **) |
---|
1648 | ckalloc((unsigned)(argc + 1) * sizeof(Tcl_Obj *)); |
---|
1649 | } |
---|
1650 | |
---|
1651 | for (i = 0; i < argc; i++) { |
---|
1652 | length = strlen(argv[i]); |
---|
1653 | TclNewObj(objPtr); |
---|
1654 | TclInitStringRep(objPtr, argv[i], length); |
---|
1655 | Tcl_IncrRefCount(objPtr); |
---|
1656 | objv[i] = objPtr; |
---|
1657 | } |
---|
1658 | objv[argc] = 0; |
---|
1659 | |
---|
1660 | /* |
---|
1661 | * Invoke the command's object-based Tcl_ObjCmdProc. |
---|
1662 | */ |
---|
1663 | |
---|
1664 | result = (*cmdPtr->objProc)(cmdPtr->objClientData, interp, argc, objv); |
---|
1665 | |
---|
1666 | /* |
---|
1667 | * Move the interpreter's object result to the string result, |
---|
1668 | * then reset the object result. |
---|
1669 | * FAILS IF OBJECT RESULT'S STRING REPRESENTATION CONTAINS NULL BYTES. |
---|
1670 | */ |
---|
1671 | |
---|
1672 | Tcl_SetResult(interp, |
---|
1673 | TclGetStringFromObj(Tcl_GetObjResult(interp), (int *) NULL), |
---|
1674 | TCL_VOLATILE); |
---|
1675 | |
---|
1676 | /* |
---|
1677 | * Decrement the ref counts for the argument objects created above, |
---|
1678 | * then free the objv array if malloc'ed storage was used. |
---|
1679 | */ |
---|
1680 | |
---|
1681 | for (i = 0; i < argc; i++) { |
---|
1682 | objPtr = objv[i]; |
---|
1683 | Tcl_DecrRefCount(objPtr); |
---|
1684 | } |
---|
1685 | if (objv != argStorage) { |
---|
1686 | ckfree((char *) objv); |
---|
1687 | } |
---|
1688 | return result; |
---|
1689 | #undef NUM_ARGS |
---|
1690 | } |
---|
1691 | /* |
---|
1692 | *---------------------------------------------------------------------- |
---|
1693 | * |
---|
1694 | * Tcl_SetCommandInfo -- |
---|
1695 | * |
---|
1696 | * Modifies various information about a Tcl command. Note that |
---|
1697 | * this procedure will not change a command's namespace; use |
---|
1698 | * Tcl_RenameCommand to do that. Also, the isNativeObjectProc |
---|
1699 | * member of *infoPtr is ignored. |
---|
1700 | * |
---|
1701 | * Results: |
---|
1702 | * If cmdName exists in interp, then the information at *infoPtr |
---|
1703 | * is stored with the command in place of the current information |
---|
1704 | * and 1 is returned. If the command doesn't exist then 0 is |
---|
1705 | * returned. |
---|
1706 | * |
---|
1707 | * Side effects: |
---|
1708 | * None. |
---|
1709 | * |
---|
1710 | *---------------------------------------------------------------------- |
---|
1711 | */ |
---|
1712 | |
---|
1713 | int |
---|
1714 | Tcl_SetCommandInfo(interp, cmdName, infoPtr) |
---|
1715 | Tcl_Interp *interp; /* Interpreter in which to look |
---|
1716 | * for command. */ |
---|
1717 | char *cmdName; /* Name of desired command. */ |
---|
1718 | Tcl_CmdInfo *infoPtr; /* Where to store information about |
---|
1719 | * command. */ |
---|
1720 | { |
---|
1721 | Tcl_Command cmd; |
---|
1722 | Command *cmdPtr; |
---|
1723 | |
---|
1724 | cmd = Tcl_FindCommand(interp, cmdName, (Tcl_Namespace *) NULL, |
---|
1725 | /*flags*/ 0); |
---|
1726 | if (cmd == (Tcl_Command) NULL) { |
---|
1727 | return 0; |
---|
1728 | } |
---|
1729 | |
---|
1730 | /* |
---|
1731 | * The isNativeObjectProc and nsPtr members of *infoPtr are ignored. |
---|
1732 | */ |
---|
1733 | |
---|
1734 | cmdPtr = (Command *) cmd; |
---|
1735 | cmdPtr->proc = infoPtr->proc; |
---|
1736 | cmdPtr->clientData = infoPtr->clientData; |
---|
1737 | if (infoPtr->objProc == (Tcl_ObjCmdProc *) NULL) { |
---|
1738 | cmdPtr->objProc = TclInvokeStringCommand; |
---|
1739 | cmdPtr->objClientData = (ClientData) cmdPtr; |
---|
1740 | } else { |
---|
1741 | cmdPtr->objProc = infoPtr->objProc; |
---|
1742 | cmdPtr->objClientData = infoPtr->objClientData; |
---|
1743 | } |
---|
1744 | cmdPtr->deleteProc = infoPtr->deleteProc; |
---|
1745 | cmdPtr->deleteData = infoPtr->deleteData; |
---|
1746 | return 1; |
---|
1747 | } |
---|
1748 | |
---|
1749 | /* |
---|
1750 | *---------------------------------------------------------------------- |
---|
1751 | * |
---|
1752 | * Tcl_GetCommandInfo -- |
---|
1753 | * |
---|
1754 | * Returns various information about a Tcl command. |
---|
1755 | * |
---|
1756 | * Results: |
---|
1757 | * If cmdName exists in interp, then *infoPtr is modified to |
---|
1758 | * hold information about cmdName and 1 is returned. If the |
---|
1759 | * command doesn't exist then 0 is returned and *infoPtr isn't |
---|
1760 | * modified. |
---|
1761 | * |
---|
1762 | * Side effects: |
---|
1763 | * None. |
---|
1764 | * |
---|
1765 | *---------------------------------------------------------------------- |
---|
1766 | */ |
---|
1767 | |
---|
1768 | int |
---|
1769 | Tcl_GetCommandInfo(interp, cmdName, infoPtr) |
---|
1770 | Tcl_Interp *interp; /* Interpreter in which to look |
---|
1771 | * for command. */ |
---|
1772 | char *cmdName; /* Name of desired command. */ |
---|
1773 | Tcl_CmdInfo *infoPtr; /* Where to store information about |
---|
1774 | * command. */ |
---|
1775 | { |
---|
1776 | Tcl_Command cmd; |
---|
1777 | Command *cmdPtr; |
---|
1778 | |
---|
1779 | cmd = Tcl_FindCommand(interp, cmdName, (Tcl_Namespace *) NULL, |
---|
1780 | /*flags*/ 0); |
---|
1781 | if (cmd == (Tcl_Command) NULL) { |
---|
1782 | return 0; |
---|
1783 | } |
---|
1784 | |
---|
1785 | /* |
---|
1786 | * Set isNativeObjectProc 1 if objProc was registered by a call to |
---|
1787 | * Tcl_CreateObjCommand. Otherwise set it to 0. |
---|
1788 | */ |
---|
1789 | |
---|
1790 | cmdPtr = (Command *) cmd; |
---|
1791 | infoPtr->isNativeObjectProc = |
---|
1792 | (cmdPtr->objProc != TclInvokeStringCommand); |
---|
1793 | infoPtr->objProc = cmdPtr->objProc; |
---|
1794 | infoPtr->objClientData = cmdPtr->objClientData; |
---|
1795 | infoPtr->proc = cmdPtr->proc; |
---|
1796 | infoPtr->clientData = cmdPtr->clientData; |
---|
1797 | infoPtr->deleteProc = cmdPtr->deleteProc; |
---|
1798 | infoPtr->deleteData = cmdPtr->deleteData; |
---|
1799 | infoPtr->namespacePtr = (Tcl_Namespace *) cmdPtr->nsPtr; |
---|
1800 | return 1; |
---|
1801 | } |
---|
1802 | |
---|
1803 | /* |
---|
1804 | *---------------------------------------------------------------------- |
---|
1805 | * |
---|
1806 | * Tcl_GetCommandName -- |
---|
1807 | * |
---|
1808 | * Given a token returned by Tcl_CreateCommand, this procedure |
---|
1809 | * returns the current name of the command (which may have changed |
---|
1810 | * due to renaming). |
---|
1811 | * |
---|
1812 | * Results: |
---|
1813 | * The return value is the name of the given command. |
---|
1814 | * |
---|
1815 | * Side effects: |
---|
1816 | * None. |
---|
1817 | * |
---|
1818 | *---------------------------------------------------------------------- |
---|
1819 | */ |
---|
1820 | |
---|
1821 | char * |
---|
1822 | Tcl_GetCommandName(interp, command) |
---|
1823 | Tcl_Interp *interp; /* Interpreter containing the command. */ |
---|
1824 | Tcl_Command command; /* Token for command returned by a previous |
---|
1825 | * call to Tcl_CreateCommand. The command |
---|
1826 | * must not have been deleted. */ |
---|
1827 | { |
---|
1828 | Command *cmdPtr = (Command *) command; |
---|
1829 | |
---|
1830 | if ((cmdPtr == NULL) || (cmdPtr->hPtr == NULL)) { |
---|
1831 | |
---|
1832 | /* |
---|
1833 | * This should only happen if command was "created" after the |
---|
1834 | * interpreter began to be deleted, so there isn't really any |
---|
1835 | * command. Just return an empty string. |
---|
1836 | */ |
---|
1837 | |
---|
1838 | return ""; |
---|
1839 | } |
---|
1840 | return Tcl_GetHashKey(cmdPtr->hPtr->tablePtr, cmdPtr->hPtr); |
---|
1841 | } |
---|
1842 | |
---|
1843 | /* |
---|
1844 | *---------------------------------------------------------------------- |
---|
1845 | * |
---|
1846 | * Tcl_GetCommandFullName -- |
---|
1847 | * |
---|
1848 | * Given a token returned by, e.g., Tcl_CreateCommand or |
---|
1849 | * Tcl_FindCommand, this procedure appends to an object the command's |
---|
1850 | * full name, qualified by a sequence of parent namespace names. The |
---|
1851 | * command's fully-qualified name may have changed due to renaming. |
---|
1852 | * |
---|
1853 | * Results: |
---|
1854 | * None. |
---|
1855 | * |
---|
1856 | * Side effects: |
---|
1857 | * The command's fully-qualified name is appended to the string |
---|
1858 | * representation of objPtr. |
---|
1859 | * |
---|
1860 | *---------------------------------------------------------------------- |
---|
1861 | */ |
---|
1862 | |
---|
1863 | void |
---|
1864 | Tcl_GetCommandFullName(interp, command, objPtr) |
---|
1865 | Tcl_Interp *interp; /* Interpreter containing the command. */ |
---|
1866 | Tcl_Command command; /* Token for command returned by a previous |
---|
1867 | * call to Tcl_CreateCommand. The command |
---|
1868 | * must not have been deleted. */ |
---|
1869 | Tcl_Obj *objPtr; /* Points to the object onto which the |
---|
1870 | * command's full name is appended. */ |
---|
1871 | |
---|
1872 | { |
---|
1873 | Interp *iPtr = (Interp *) interp; |
---|
1874 | register Command *cmdPtr = (Command *) command; |
---|
1875 | char *name; |
---|
1876 | |
---|
1877 | /* |
---|
1878 | * Add the full name of the containing namespace, followed by the "::" |
---|
1879 | * separator, and the command name. |
---|
1880 | */ |
---|
1881 | |
---|
1882 | if (cmdPtr != NULL) { |
---|
1883 | if (cmdPtr->nsPtr != NULL) { |
---|
1884 | Tcl_AppendToObj(objPtr, cmdPtr->nsPtr->fullName, -1); |
---|
1885 | if (cmdPtr->nsPtr != iPtr->globalNsPtr) { |
---|
1886 | Tcl_AppendToObj(objPtr, "::", 2); |
---|
1887 | } |
---|
1888 | } |
---|
1889 | if (cmdPtr->hPtr != NULL) { |
---|
1890 | name = Tcl_GetHashKey(cmdPtr->hPtr->tablePtr, cmdPtr->hPtr); |
---|
1891 | Tcl_AppendToObj(objPtr, name, -1); |
---|
1892 | } |
---|
1893 | } |
---|
1894 | } |
---|
1895 | |
---|
1896 | /* |
---|
1897 | *---------------------------------------------------------------------- |
---|
1898 | * |
---|
1899 | * Tcl_DeleteCommand -- |
---|
1900 | * |
---|
1901 | * Remove the given command from the given interpreter. |
---|
1902 | * |
---|
1903 | * Results: |
---|
1904 | * 0 is returned if the command was deleted successfully. |
---|
1905 | * -1 is returned if there didn't exist a command by that name. |
---|
1906 | * |
---|
1907 | * Side effects: |
---|
1908 | * cmdName will no longer be recognized as a valid command for |
---|
1909 | * interp. |
---|
1910 | * |
---|
1911 | *---------------------------------------------------------------------- |
---|
1912 | */ |
---|
1913 | |
---|
1914 | int |
---|
1915 | Tcl_DeleteCommand(interp, cmdName) |
---|
1916 | Tcl_Interp *interp; /* Token for command interpreter (returned |
---|
1917 | * by a previous Tcl_CreateInterp call). */ |
---|
1918 | char *cmdName; /* Name of command to remove. */ |
---|
1919 | { |
---|
1920 | Tcl_Command cmd; |
---|
1921 | |
---|
1922 | /* |
---|
1923 | * Find the desired command and delete it. |
---|
1924 | */ |
---|
1925 | |
---|
1926 | cmd = Tcl_FindCommand(interp, cmdName, (Tcl_Namespace *) NULL, |
---|
1927 | /*flags*/ 0); |
---|
1928 | if (cmd == (Tcl_Command) NULL) { |
---|
1929 | return -1; |
---|
1930 | } |
---|
1931 | return Tcl_DeleteCommandFromToken(interp, cmd); |
---|
1932 | } |
---|
1933 | |
---|
1934 | /* |
---|
1935 | *---------------------------------------------------------------------- |
---|
1936 | * |
---|
1937 | * Tcl_DeleteCommandFromToken -- |
---|
1938 | * |
---|
1939 | * Removes the given command from the given interpreter. This procedure |
---|
1940 | * resembles Tcl_DeleteCommand, but takes a Tcl_Command token instead |
---|
1941 | * of a command name for efficiency. |
---|
1942 | * |
---|
1943 | * Results: |
---|
1944 | * 0 is returned if the command was deleted successfully. |
---|
1945 | * -1 is returned if there didn't exist a command by that name. |
---|
1946 | * |
---|
1947 | * Side effects: |
---|
1948 | * The command specified by "cmd" will no longer be recognized as a |
---|
1949 | * valid command for "interp". |
---|
1950 | * |
---|
1951 | *---------------------------------------------------------------------- |
---|
1952 | */ |
---|
1953 | |
---|
1954 | int |
---|
1955 | Tcl_DeleteCommandFromToken(interp, cmd) |
---|
1956 | Tcl_Interp *interp; /* Token for command interpreter returned by |
---|
1957 | * a previous call to Tcl_CreateInterp. */ |
---|
1958 | Tcl_Command cmd; /* Token for command to delete. */ |
---|
1959 | { |
---|
1960 | Interp *iPtr = (Interp *) interp; |
---|
1961 | Command *cmdPtr = (Command *) cmd; |
---|
1962 | ImportRef *refPtr, *nextRefPtr; |
---|
1963 | Tcl_Command importCmd; |
---|
1964 | |
---|
1965 | /* |
---|
1966 | * The code here is tricky. We can't delete the hash table entry |
---|
1967 | * before invoking the deletion callback because there are cases |
---|
1968 | * where the deletion callback needs to invoke the command (e.g. |
---|
1969 | * object systems such as OTcl). However, this means that the |
---|
1970 | * callback could try to delete or rename the command. The deleted |
---|
1971 | * flag allows us to detect these cases and skip nested deletes. |
---|
1972 | */ |
---|
1973 | |
---|
1974 | if (cmdPtr->deleted) { |
---|
1975 | /* |
---|
1976 | * Another deletion is already in progress. Remove the hash |
---|
1977 | * table entry now, but don't invoke a callback or free the |
---|
1978 | * command structure. |
---|
1979 | */ |
---|
1980 | |
---|
1981 | Tcl_DeleteHashEntry(cmdPtr->hPtr); |
---|
1982 | cmdPtr->hPtr = NULL; |
---|
1983 | return 0; |
---|
1984 | } |
---|
1985 | |
---|
1986 | /* |
---|
1987 | * If the command being deleted has a compile procedure, increment the |
---|
1988 | * interpreter's compileEpoch to invalidate its compiled code. This |
---|
1989 | * makes sure that we don't later try to execute old code compiled with |
---|
1990 | * command-specific (i.e., inline) bytecodes for the now-deleted |
---|
1991 | * command. This field is checked in Tcl_EvalObj and ObjInterpProc, and |
---|
1992 | * code whose compilation epoch doesn't match is recompiled. |
---|
1993 | */ |
---|
1994 | |
---|
1995 | if (cmdPtr->compileProc != NULL) { |
---|
1996 | iPtr->compileEpoch++; |
---|
1997 | } |
---|
1998 | |
---|
1999 | cmdPtr->deleted = 1; |
---|
2000 | if (cmdPtr->deleteProc != NULL) { |
---|
2001 | /* |
---|
2002 | * Delete the command's client data. If this was an imported command |
---|
2003 | * created when a command was imported into a namespace, this client |
---|
2004 | * data will be a pointer to a ImportedCmdData structure describing |
---|
2005 | * the "real" command that this imported command refers to. |
---|
2006 | */ |
---|
2007 | |
---|
2008 | (*cmdPtr->deleteProc)(cmdPtr->deleteData); |
---|
2009 | } |
---|
2010 | |
---|
2011 | /* |
---|
2012 | * Bump the command epoch counter. This will invalidate all cached |
---|
2013 | * references that point to this command. |
---|
2014 | */ |
---|
2015 | |
---|
2016 | cmdPtr->cmdEpoch++; |
---|
2017 | |
---|
2018 | /* |
---|
2019 | * If this command was imported into other namespaces, then imported |
---|
2020 | * commands were created that refer back to this command. Delete these |
---|
2021 | * imported commands now. |
---|
2022 | */ |
---|
2023 | |
---|
2024 | for (refPtr = cmdPtr->importRefPtr; refPtr != NULL; |
---|
2025 | refPtr = nextRefPtr) { |
---|
2026 | nextRefPtr = refPtr->nextPtr; |
---|
2027 | importCmd = (Tcl_Command) refPtr->importedCmdPtr; |
---|
2028 | Tcl_DeleteCommandFromToken(interp, importCmd); |
---|
2029 | } |
---|
2030 | |
---|
2031 | /* |
---|
2032 | * Don't use hPtr to delete the hash entry here, because it's |
---|
2033 | * possible that the deletion callback renamed the command. |
---|
2034 | * Instead, use cmdPtr->hptr, and make sure that no-one else |
---|
2035 | * has already deleted the hash entry. |
---|
2036 | */ |
---|
2037 | |
---|
2038 | if (cmdPtr->hPtr != NULL) { |
---|
2039 | Tcl_DeleteHashEntry(cmdPtr->hPtr); |
---|
2040 | } |
---|
2041 | |
---|
2042 | /* |
---|
2043 | * Mark the Command structure as no longer valid. This allows |
---|
2044 | * TclExecuteByteCode to recognize when a Command has logically been |
---|
2045 | * deleted and a pointer to this Command structure cached in a CmdName |
---|
2046 | * object is invalid. TclExecuteByteCode will look up the command again |
---|
2047 | * in the interpreter's command hashtable. |
---|
2048 | */ |
---|
2049 | |
---|
2050 | cmdPtr->objProc = NULL; |
---|
2051 | |
---|
2052 | /* |
---|
2053 | * Now free the Command structure, unless there is another reference to |
---|
2054 | * it from a CmdName Tcl object in some ByteCode code sequence. In that |
---|
2055 | * case, delay the cleanup until all references are either discarded |
---|
2056 | * (when a ByteCode is freed) or replaced by a new reference (when a |
---|
2057 | * cached CmdName Command reference is found to be invalid and |
---|
2058 | * TclExecuteByteCode looks up the command in the command hashtable). |
---|
2059 | */ |
---|
2060 | |
---|
2061 | TclCleanupCommand(cmdPtr); |
---|
2062 | return 0; |
---|
2063 | } |
---|
2064 | |
---|
2065 | /* |
---|
2066 | *---------------------------------------------------------------------- |
---|
2067 | * |
---|
2068 | * TclCleanupCommand -- |
---|
2069 | * |
---|
2070 | * This procedure frees up a Command structure unless it is still |
---|
2071 | * referenced from an interpreter's command hashtable or from a CmdName |
---|
2072 | * Tcl object representing the name of a command in a ByteCode |
---|
2073 | * instruction sequence. |
---|
2074 | * |
---|
2075 | * Results: |
---|
2076 | * None. |
---|
2077 | * |
---|
2078 | * Side effects: |
---|
2079 | * Memory gets freed unless a reference to the Command structure still |
---|
2080 | * exists. In that case the cleanup is delayed until the command is |
---|
2081 | * deleted or when the last ByteCode referring to it is freed. |
---|
2082 | * |
---|
2083 | *---------------------------------------------------------------------- |
---|
2084 | */ |
---|
2085 | |
---|
2086 | void |
---|
2087 | TclCleanupCommand(cmdPtr) |
---|
2088 | register Command *cmdPtr; /* Points to the Command structure to |
---|
2089 | * be freed. */ |
---|
2090 | { |
---|
2091 | cmdPtr->refCount--; |
---|
2092 | if (cmdPtr->refCount <= 0) { |
---|
2093 | ckfree((char *) cmdPtr); |
---|
2094 | } |
---|
2095 | } |
---|
2096 | |
---|
2097 | /* |
---|
2098 | *---------------------------------------------------------------------- |
---|
2099 | * |
---|
2100 | * Tcl_Eval -- |
---|
2101 | * |
---|
2102 | * Execute a Tcl command in a string. |
---|
2103 | * |
---|
2104 | * Results: |
---|
2105 | * The return value is one of the return codes defined in tcl.h |
---|
2106 | * (such as TCL_OK), and interp->result contains a string value |
---|
2107 | * to supplement the return code. The value of interp->result |
---|
2108 | * will persist only until the next call to Tcl_Eval or Tcl_EvalObj: |
---|
2109 | * you must copy it or lose it! |
---|
2110 | * |
---|
2111 | * Side effects: |
---|
2112 | * The string is compiled to produce a ByteCode object that holds the |
---|
2113 | * command's bytecode instructions. However, this ByteCode object is |
---|
2114 | * lost after executing the command. The command's execution will |
---|
2115 | * almost certainly have side effects. interp->termOffset is set to the |
---|
2116 | * offset of the character in "string" just after the last one |
---|
2117 | * successfully compiled or executed. |
---|
2118 | * |
---|
2119 | *---------------------------------------------------------------------- |
---|
2120 | */ |
---|
2121 | |
---|
2122 | int |
---|
2123 | Tcl_Eval(interp, string) |
---|
2124 | Tcl_Interp *interp; /* Token for command interpreter (returned |
---|
2125 | * by previous call to Tcl_CreateInterp). */ |
---|
2126 | char *string; /* Pointer to TCL command to execute. */ |
---|
2127 | { |
---|
2128 | register Tcl_Obj *cmdPtr; |
---|
2129 | int length = strlen(string); |
---|
2130 | int result; |
---|
2131 | |
---|
2132 | if (length > 0) { |
---|
2133 | /* |
---|
2134 | * Initialize a Tcl object from the command string. |
---|
2135 | */ |
---|
2136 | |
---|
2137 | TclNewObj(cmdPtr); |
---|
2138 | TclInitStringRep(cmdPtr, string, length); |
---|
2139 | Tcl_IncrRefCount(cmdPtr); |
---|
2140 | |
---|
2141 | /* |
---|
2142 | * Compile and execute the bytecodes. |
---|
2143 | */ |
---|
2144 | |
---|
2145 | result = Tcl_EvalObj(interp, cmdPtr); |
---|
2146 | |
---|
2147 | /* |
---|
2148 | * Move the interpreter's object result to the string result, |
---|
2149 | * then reset the object result. |
---|
2150 | * FAILS IF OBJECT RESULT'S STRING REPRESENTATION CONTAINS NULLS. |
---|
2151 | */ |
---|
2152 | |
---|
2153 | Tcl_SetResult(interp, |
---|
2154 | TclGetStringFromObj(Tcl_GetObjResult(interp), (int *) NULL), |
---|
2155 | TCL_VOLATILE); |
---|
2156 | |
---|
2157 | /* |
---|
2158 | * Discard the Tcl object created to hold the command and its code. |
---|
2159 | */ |
---|
2160 | |
---|
2161 | Tcl_DecrRefCount(cmdPtr); |
---|
2162 | } else { |
---|
2163 | /* |
---|
2164 | * An empty string. Just reset the interpreter's result. |
---|
2165 | */ |
---|
2166 | |
---|
2167 | Tcl_ResetResult(interp); |
---|
2168 | result = TCL_OK; |
---|
2169 | } |
---|
2170 | return result; |
---|
2171 | } |
---|
2172 | |
---|
2173 | /* |
---|
2174 | *---------------------------------------------------------------------- |
---|
2175 | * |
---|
2176 | * Tcl_EvalObj -- |
---|
2177 | * |
---|
2178 | * Execute Tcl commands stored in a Tcl object. These commands are |
---|
2179 | * compiled into bytecodes if necessary. |
---|
2180 | * |
---|
2181 | * Results: |
---|
2182 | * The return value is one of the return codes defined in tcl.h |
---|
2183 | * (such as TCL_OK), and the interpreter's result contains a value |
---|
2184 | * to supplement the return code. |
---|
2185 | * |
---|
2186 | * Side effects: |
---|
2187 | * The object is converted, if necessary, to a ByteCode object that |
---|
2188 | * holds the bytecode instructions for the commands. Executing the |
---|
2189 | * commands will almost certainly have side effects that depend |
---|
2190 | * on those commands. |
---|
2191 | * |
---|
2192 | * Just as in Tcl_Eval, interp->termOffset is set to the offset of the |
---|
2193 | * last character executed in the objPtr's string. |
---|
2194 | * |
---|
2195 | *---------------------------------------------------------------------- |
---|
2196 | */ |
---|
2197 | |
---|
2198 | #undef Tcl_EvalObj |
---|
2199 | |
---|
2200 | int |
---|
2201 | Tcl_EvalObj(interp, objPtr) |
---|
2202 | Tcl_Interp *interp; /* Token for command interpreter |
---|
2203 | * (returned by a previous call to |
---|
2204 | * Tcl_CreateInterp). */ |
---|
2205 | Tcl_Obj *objPtr; /* Pointer to object containing |
---|
2206 | * commands to execute. */ |
---|
2207 | { |
---|
2208 | register Interp *iPtr = (Interp *) interp; |
---|
2209 | int flags; /* Interp->evalFlags value when the |
---|
2210 | * procedure was called. */ |
---|
2211 | register ByteCode* codePtr; /* Tcl Internal type of bytecode. */ |
---|
2212 | int oldCount = iPtr->cmdCount; /* Used to tell whether any commands |
---|
2213 | * at all were executed. */ |
---|
2214 | int numSrcChars; |
---|
2215 | register int result; |
---|
2216 | Namespace *namespacePtr; |
---|
2217 | |
---|
2218 | /* |
---|
2219 | * Reset both the interpreter's string and object results and clear out |
---|
2220 | * any error information. This makes sure that we return an empty |
---|
2221 | * result if there are no commands in the command string. |
---|
2222 | */ |
---|
2223 | |
---|
2224 | Tcl_ResetResult(interp); |
---|
2225 | |
---|
2226 | /* |
---|
2227 | * Check depth of nested calls to Tcl_Eval: if this gets too large, |
---|
2228 | * it's probably because of an infinite loop somewhere. |
---|
2229 | */ |
---|
2230 | |
---|
2231 | iPtr->numLevels++; |
---|
2232 | if (iPtr->numLevels > iPtr->maxNestingDepth) { |
---|
2233 | iPtr->numLevels--; |
---|
2234 | Tcl_AppendToObj(Tcl_GetObjResult(interp), |
---|
2235 | "too many nested calls to Tcl_EvalObj (infinite loop?)", -1); |
---|
2236 | return TCL_ERROR; |
---|
2237 | } |
---|
2238 | |
---|
2239 | /* |
---|
2240 | * If the interpreter has been deleted, return an error. |
---|
2241 | */ |
---|
2242 | |
---|
2243 | if (iPtr->flags & DELETED) { |
---|
2244 | Tcl_ResetResult(interp); |
---|
2245 | Tcl_AppendToObj(Tcl_GetObjResult(interp), |
---|
2246 | "attempt to call eval in deleted interpreter", -1); |
---|
2247 | Tcl_SetErrorCode(interp, "CORE", "IDELETE", |
---|
2248 | "attempt to call eval in deleted interpreter", (char *) NULL); |
---|
2249 | iPtr->numLevels--; |
---|
2250 | return TCL_ERROR; |
---|
2251 | } |
---|
2252 | |
---|
2253 | /* |
---|
2254 | * Get the ByteCode from the object. If it exists, make sure it hasn't |
---|
2255 | * been invalidated by, e.g., someone redefining a command with a |
---|
2256 | * compile procedure (this might make the compiled code wrong). If |
---|
2257 | * necessary, convert the object to be a ByteCode object and compile it. |
---|
2258 | * Also, if the code was compiled in/for a different interpreter, |
---|
2259 | * or for a different namespace, or for the same namespace but |
---|
2260 | * with different name resolution rules, we recompile it. |
---|
2261 | * |
---|
2262 | * Precompiled objects, however, are immutable and therefore |
---|
2263 | * they are not recompiled, even if the epoch has changed. |
---|
2264 | */ |
---|
2265 | |
---|
2266 | if (iPtr->varFramePtr != NULL) { |
---|
2267 | namespacePtr = iPtr->varFramePtr->nsPtr; |
---|
2268 | } else { |
---|
2269 | namespacePtr = iPtr->globalNsPtr; |
---|
2270 | } |
---|
2271 | |
---|
2272 | if (objPtr->typePtr == &tclByteCodeType) { |
---|
2273 | codePtr = (ByteCode *) objPtr->internalRep.otherValuePtr; |
---|
2274 | |
---|
2275 | if ((codePtr->iPtr != iPtr) |
---|
2276 | || (codePtr->compileEpoch != iPtr->compileEpoch) |
---|
2277 | || (codePtr->nsPtr != namespacePtr) |
---|
2278 | || (codePtr->nsEpoch != namespacePtr->resolverEpoch)) { |
---|
2279 | if (codePtr->flags & TCL_BYTECODE_PRECOMPILED) { |
---|
2280 | if (codePtr->iPtr != iPtr) { |
---|
2281 | panic("Tcl_EvalObj: compiled script jumped interps"); |
---|
2282 | } |
---|
2283 | codePtr->compileEpoch = iPtr->compileEpoch; |
---|
2284 | } else { |
---|
2285 | tclByteCodeType.freeIntRepProc(objPtr); |
---|
2286 | } |
---|
2287 | } |
---|
2288 | } |
---|
2289 | if (objPtr->typePtr != &tclByteCodeType) { |
---|
2290 | /* |
---|
2291 | * First reset any error line number information. |
---|
2292 | */ |
---|
2293 | |
---|
2294 | iPtr->errorLine = 1; /* no correct line # information yet */ |
---|
2295 | result = tclByteCodeType.setFromAnyProc(interp, objPtr); |
---|
2296 | if (result != TCL_OK) { |
---|
2297 | iPtr->numLevels--; |
---|
2298 | return result; |
---|
2299 | } |
---|
2300 | } |
---|
2301 | codePtr = (ByteCode *) objPtr->internalRep.otherValuePtr; |
---|
2302 | |
---|
2303 | /* |
---|
2304 | * Extract then reset the compilation flags in the interpreter. |
---|
2305 | * Resetting the flags must be done after any compilation. |
---|
2306 | */ |
---|
2307 | |
---|
2308 | flags = iPtr->evalFlags; |
---|
2309 | iPtr->evalFlags = 0; |
---|
2310 | |
---|
2311 | /* |
---|
2312 | * Execute the commands. If the code was compiled from an empty string, |
---|
2313 | * don't bother executing the code. |
---|
2314 | */ |
---|
2315 | |
---|
2316 | numSrcChars = codePtr->numSrcChars; |
---|
2317 | if ((numSrcChars > 0) || (codePtr->flags & TCL_BYTECODE_PRECOMPILED)) { |
---|
2318 | /* |
---|
2319 | * Increment the code's ref count while it is being executed. If |
---|
2320 | * afterwards no references to it remain, free the code. |
---|
2321 | */ |
---|
2322 | |
---|
2323 | codePtr->refCount++; |
---|
2324 | result = TclExecuteByteCode(interp, codePtr); |
---|
2325 | codePtr->refCount--; |
---|
2326 | if (codePtr->refCount <= 0) { |
---|
2327 | TclCleanupByteCode(codePtr); |
---|
2328 | } |
---|
2329 | } else { |
---|
2330 | Tcl_ResetResult(interp); |
---|
2331 | result = TCL_OK; |
---|
2332 | } |
---|
2333 | |
---|
2334 | /* |
---|
2335 | * If no commands at all were executed, check for asynchronous |
---|
2336 | * handlers so that they at least get one change to execute. |
---|
2337 | * This is needed to handle event loops written in Tcl with |
---|
2338 | * empty bodies. |
---|
2339 | */ |
---|
2340 | |
---|
2341 | if ((oldCount == iPtr->cmdCount) && (Tcl_AsyncReady())) { |
---|
2342 | result = Tcl_AsyncInvoke(interp, result); |
---|
2343 | } |
---|
2344 | |
---|
2345 | /* |
---|
2346 | * Free up any extra resources that were allocated. |
---|
2347 | */ |
---|
2348 | |
---|
2349 | iPtr->numLevels--; |
---|
2350 | if (iPtr->numLevels == 0) { |
---|
2351 | if (result == TCL_RETURN) { |
---|
2352 | result = TclUpdateReturnInfo(iPtr); |
---|
2353 | } |
---|
2354 | if ((result != TCL_OK) && (result != TCL_ERROR) |
---|
2355 | && !(flags & TCL_ALLOW_EXCEPTIONS)) { |
---|
2356 | Tcl_ResetResult(interp); |
---|
2357 | if (result == TCL_BREAK) { |
---|
2358 | Tcl_AppendToObj(Tcl_GetObjResult(interp), |
---|
2359 | "invoked \"break\" outside of a loop", -1); |
---|
2360 | } else if (result == TCL_CONTINUE) { |
---|
2361 | Tcl_AppendToObj(Tcl_GetObjResult(interp), |
---|
2362 | "invoked \"continue\" outside of a loop", -1); |
---|
2363 | } else { |
---|
2364 | char buf[50]; |
---|
2365 | sprintf(buf, "command returned bad code: %d", result); |
---|
2366 | Tcl_AppendToObj(Tcl_GetObjResult(interp), buf, -1); |
---|
2367 | } |
---|
2368 | result = TCL_ERROR; |
---|
2369 | } |
---|
2370 | } |
---|
2371 | |
---|
2372 | /* |
---|
2373 | * If an error occurred, record information about what was being |
---|
2374 | * executed when the error occurred. |
---|
2375 | */ |
---|
2376 | |
---|
2377 | if ((result == TCL_ERROR) && !(iPtr->flags & ERR_ALREADY_LOGGED)) { |
---|
2378 | char buf[200]; |
---|
2379 | char *ellipsis = ""; |
---|
2380 | char *bytes; |
---|
2381 | int length; |
---|
2382 | |
---|
2383 | /* |
---|
2384 | * Figure out how much of the command to print in the error |
---|
2385 | * message (up to a certain number of characters, or up to |
---|
2386 | * the first new-line). |
---|
2387 | * THIS FAILS IF THE OBJECT'S STRING REP CONTAINS A NULL. |
---|
2388 | */ |
---|
2389 | |
---|
2390 | bytes = Tcl_GetStringFromObj(objPtr, &length); |
---|
2391 | length = TclMin(numSrcChars, length); |
---|
2392 | if (length > 150) { |
---|
2393 | length = 150; |
---|
2394 | ellipsis = " ..."; |
---|
2395 | } |
---|
2396 | |
---|
2397 | if (!(iPtr->flags & ERR_IN_PROGRESS)) { |
---|
2398 | sprintf(buf, "\n while executing\n\"%.*s%s\"", |
---|
2399 | length, bytes, ellipsis); |
---|
2400 | } else { |
---|
2401 | sprintf(buf, "\n invoked from within\n\"%.*s%s\"", |
---|
2402 | length, bytes, ellipsis); |
---|
2403 | } |
---|
2404 | Tcl_AddObjErrorInfo(interp, buf, -1); |
---|
2405 | } |
---|
2406 | |
---|
2407 | /* |
---|
2408 | * Set the interpreter's termOffset member to the offset of the |
---|
2409 | * character just after the last one executed. We approximate the offset |
---|
2410 | * of the last character executed by using the number of characters |
---|
2411 | * compiled. |
---|
2412 | */ |
---|
2413 | |
---|
2414 | iPtr->termOffset = numSrcChars; |
---|
2415 | iPtr->flags &= ~ERR_ALREADY_LOGGED; |
---|
2416 | return result; |
---|
2417 | } |
---|
2418 | |
---|
2419 | /* |
---|
2420 | *-------------------------------------------------------------- |
---|
2421 | * |
---|
2422 | * Tcl_ExprLong, Tcl_ExprDouble, Tcl_ExprBoolean -- |
---|
2423 | * |
---|
2424 | * Procedures to evaluate an expression and return its value in a |
---|
2425 | * particular form. |
---|
2426 | * |
---|
2427 | * Results: |
---|
2428 | * Each of the procedures below returns a standard Tcl result. If an |
---|
2429 | * error occurs then an error message is left in interp->result. |
---|
2430 | * Otherwise the value of the expression, in the appropriate form, is |
---|
2431 | * stored at *ptr. If the expression had a result that was |
---|
2432 | * incompatible with the desired form then an error is returned. |
---|
2433 | * |
---|
2434 | * Side effects: |
---|
2435 | * None. |
---|
2436 | * |
---|
2437 | *-------------------------------------------------------------- |
---|
2438 | */ |
---|
2439 | |
---|
2440 | int |
---|
2441 | Tcl_ExprLong(interp, string, ptr) |
---|
2442 | Tcl_Interp *interp; /* Context in which to evaluate the |
---|
2443 | * expression. */ |
---|
2444 | char *string; /* Expression to evaluate. */ |
---|
2445 | long *ptr; /* Where to store result. */ |
---|
2446 | { |
---|
2447 | register Tcl_Obj *exprPtr; |
---|
2448 | Tcl_Obj *resultPtr; |
---|
2449 | int length = strlen(string); |
---|
2450 | int result = TCL_OK; |
---|
2451 | |
---|
2452 | if (length > 0) { |
---|
2453 | exprPtr = Tcl_NewStringObj(string, length); |
---|
2454 | Tcl_IncrRefCount(exprPtr); |
---|
2455 | result = Tcl_ExprObj(interp, exprPtr, &resultPtr); |
---|
2456 | if (result == TCL_OK) { |
---|
2457 | /* |
---|
2458 | * Store an integer based on the expression result. |
---|
2459 | */ |
---|
2460 | |
---|
2461 | if (resultPtr->typePtr == &tclIntType) { |
---|
2462 | *ptr = resultPtr->internalRep.longValue; |
---|
2463 | } else if (resultPtr->typePtr == &tclDoubleType) { |
---|
2464 | *ptr = (long) resultPtr->internalRep.doubleValue; |
---|
2465 | } else { |
---|
2466 | Tcl_SetResult(interp, |
---|
2467 | "expression didn't have numeric value", TCL_STATIC); |
---|
2468 | result = TCL_ERROR; |
---|
2469 | } |
---|
2470 | Tcl_DecrRefCount(resultPtr); /* discard the result object */ |
---|
2471 | } else { |
---|
2472 | /* |
---|
2473 | * Move the interpreter's object result to the string result, |
---|
2474 | * then reset the object result. |
---|
2475 | * FAILS IF OBJECT RESULT'S STRING REPRESENTATION HAS NULLS. |
---|
2476 | */ |
---|
2477 | |
---|
2478 | Tcl_SetResult(interp, |
---|
2479 | TclGetStringFromObj(Tcl_GetObjResult(interp), |
---|
2480 | (int *) NULL), |
---|
2481 | TCL_VOLATILE); |
---|
2482 | } |
---|
2483 | Tcl_DecrRefCount(exprPtr); /* discard the expression object */ |
---|
2484 | } else { |
---|
2485 | /* |
---|
2486 | * An empty string. Just set the result integer to 0. |
---|
2487 | */ |
---|
2488 | |
---|
2489 | *ptr = 0; |
---|
2490 | } |
---|
2491 | return result; |
---|
2492 | } |
---|
2493 | |
---|
2494 | int |
---|
2495 | Tcl_ExprDouble(interp, string, ptr) |
---|
2496 | Tcl_Interp *interp; /* Context in which to evaluate the |
---|
2497 | * expression. */ |
---|
2498 | char *string; /* Expression to evaluate. */ |
---|
2499 | double *ptr; /* Where to store result. */ |
---|
2500 | { |
---|
2501 | register Tcl_Obj *exprPtr; |
---|
2502 | Tcl_Obj *resultPtr; |
---|
2503 | int length = strlen(string); |
---|
2504 | int result = TCL_OK; |
---|
2505 | |
---|
2506 | if (length > 0) { |
---|
2507 | exprPtr = Tcl_NewStringObj(string, length); |
---|
2508 | Tcl_IncrRefCount(exprPtr); |
---|
2509 | result = Tcl_ExprObj(interp, exprPtr, &resultPtr); |
---|
2510 | if (result == TCL_OK) { |
---|
2511 | /* |
---|
2512 | * Store a double based on the expression result. |
---|
2513 | */ |
---|
2514 | |
---|
2515 | if (resultPtr->typePtr == &tclIntType) { |
---|
2516 | *ptr = (double) resultPtr->internalRep.longValue; |
---|
2517 | } else if (resultPtr->typePtr == &tclDoubleType) { |
---|
2518 | *ptr = resultPtr->internalRep.doubleValue; |
---|
2519 | } else { |
---|
2520 | Tcl_SetResult(interp, |
---|
2521 | "expression didn't have numeric value", TCL_STATIC); |
---|
2522 | result = TCL_ERROR; |
---|
2523 | } |
---|
2524 | Tcl_DecrRefCount(resultPtr); /* discard the result object */ |
---|
2525 | } else { |
---|
2526 | /* |
---|
2527 | * Move the interpreter's object result to the string result, |
---|
2528 | * then reset the object result. |
---|
2529 | * FAILS IF OBJECT RESULT'S STRING REPRESENTATION HAS NULLS. |
---|
2530 | */ |
---|
2531 | |
---|
2532 | Tcl_SetResult(interp, |
---|
2533 | TclGetStringFromObj(Tcl_GetObjResult(interp), |
---|
2534 | (int *) NULL), |
---|
2535 | TCL_VOLATILE); |
---|
2536 | } |
---|
2537 | Tcl_DecrRefCount(exprPtr); /* discard the expression object */ |
---|
2538 | } else { |
---|
2539 | /* |
---|
2540 | * An empty string. Just set the result double to 0.0. |
---|
2541 | */ |
---|
2542 | |
---|
2543 | *ptr = 0.0; |
---|
2544 | } |
---|
2545 | return result; |
---|
2546 | } |
---|
2547 | |
---|
2548 | int |
---|
2549 | Tcl_ExprBoolean(interp, string, ptr) |
---|
2550 | Tcl_Interp *interp; /* Context in which to evaluate the |
---|
2551 | * expression. */ |
---|
2552 | char *string; /* Expression to evaluate. */ |
---|
2553 | int *ptr; /* Where to store 0/1 result. */ |
---|
2554 | { |
---|
2555 | register Tcl_Obj *exprPtr; |
---|
2556 | Tcl_Obj *resultPtr; |
---|
2557 | int length = strlen(string); |
---|
2558 | int result = TCL_OK; |
---|
2559 | |
---|
2560 | if (length > 0) { |
---|
2561 | exprPtr = Tcl_NewStringObj(string, length); |
---|
2562 | Tcl_IncrRefCount(exprPtr); |
---|
2563 | result = Tcl_ExprObj(interp, exprPtr, &resultPtr); |
---|
2564 | if (result == TCL_OK) { |
---|
2565 | /* |
---|
2566 | * Store a boolean based on the expression result. |
---|
2567 | */ |
---|
2568 | |
---|
2569 | if (resultPtr->typePtr == &tclIntType) { |
---|
2570 | *ptr = (resultPtr->internalRep.longValue != 0); |
---|
2571 | } else if (resultPtr->typePtr == &tclDoubleType) { |
---|
2572 | *ptr = (resultPtr->internalRep.doubleValue != 0.0); |
---|
2573 | } else { |
---|
2574 | result = Tcl_GetBooleanFromObj(interp, resultPtr, ptr); |
---|
2575 | } |
---|
2576 | Tcl_DecrRefCount(resultPtr); /* discard the result object */ |
---|
2577 | } |
---|
2578 | if (result != TCL_OK) { |
---|
2579 | /* |
---|
2580 | * Move the interpreter's object result to the string result, |
---|
2581 | * then reset the object result. |
---|
2582 | * FAILS IF OBJECT RESULT'S STRING REPRESENTATION HAS NULLS. |
---|
2583 | */ |
---|
2584 | |
---|
2585 | Tcl_SetResult(interp, |
---|
2586 | TclGetStringFromObj(Tcl_GetObjResult(interp), |
---|
2587 | (int *) NULL), |
---|
2588 | TCL_VOLATILE); |
---|
2589 | } |
---|
2590 | Tcl_DecrRefCount(exprPtr); /* discard the expression object */ |
---|
2591 | } else { |
---|
2592 | /* |
---|
2593 | * An empty string. Just set the result boolean to 0 (false). |
---|
2594 | */ |
---|
2595 | |
---|
2596 | *ptr = 0; |
---|
2597 | } |
---|
2598 | return result; |
---|
2599 | } |
---|
2600 | |
---|
2601 | /* |
---|
2602 | *-------------------------------------------------------------- |
---|
2603 | * |
---|
2604 | * Tcl_ExprLongObj, Tcl_ExprDoubleObj, Tcl_ExprBooleanObj -- |
---|
2605 | * |
---|
2606 | * Procedures to evaluate an expression in an object and return its |
---|
2607 | * value in a particular form. |
---|
2608 | * |
---|
2609 | * Results: |
---|
2610 | * Each of the procedures below returns a standard Tcl result |
---|
2611 | * object. If an error occurs then an error message is left in the |
---|
2612 | * interpreter's result. Otherwise the value of the expression, in the |
---|
2613 | * appropriate form, is stored at *ptr. If the expression had a result |
---|
2614 | * that was incompatible with the desired form then an error is |
---|
2615 | * returned. |
---|
2616 | * |
---|
2617 | * Side effects: |
---|
2618 | * None. |
---|
2619 | * |
---|
2620 | *-------------------------------------------------------------- |
---|
2621 | */ |
---|
2622 | |
---|
2623 | int |
---|
2624 | Tcl_ExprLongObj(interp, objPtr, ptr) |
---|
2625 | Tcl_Interp *interp; /* Context in which to evaluate the |
---|
2626 | * expression. */ |
---|
2627 | register Tcl_Obj *objPtr; /* Expression to evaluate. */ |
---|
2628 | long *ptr; /* Where to store long result. */ |
---|
2629 | { |
---|
2630 | Tcl_Obj *resultPtr; |
---|
2631 | int result; |
---|
2632 | |
---|
2633 | result = Tcl_ExprObj(interp, objPtr, &resultPtr); |
---|
2634 | if (result == TCL_OK) { |
---|
2635 | if (resultPtr->typePtr == &tclIntType) { |
---|
2636 | *ptr = resultPtr->internalRep.longValue; |
---|
2637 | } else if (resultPtr->typePtr == &tclDoubleType) { |
---|
2638 | *ptr = (long) resultPtr->internalRep.doubleValue; |
---|
2639 | } else { |
---|
2640 | result = Tcl_GetLongFromObj(interp, resultPtr, ptr); |
---|
2641 | if (result != TCL_OK) { |
---|
2642 | return result; |
---|
2643 | } |
---|
2644 | } |
---|
2645 | Tcl_DecrRefCount(resultPtr); /* discard the result object */ |
---|
2646 | } |
---|
2647 | return result; |
---|
2648 | } |
---|
2649 | |
---|
2650 | int |
---|
2651 | Tcl_ExprDoubleObj(interp, objPtr, ptr) |
---|
2652 | Tcl_Interp *interp; /* Context in which to evaluate the |
---|
2653 | * expression. */ |
---|
2654 | register Tcl_Obj *objPtr; /* Expression to evaluate. */ |
---|
2655 | double *ptr; /* Where to store double result. */ |
---|
2656 | { |
---|
2657 | Tcl_Obj *resultPtr; |
---|
2658 | int result; |
---|
2659 | |
---|
2660 | result = Tcl_ExprObj(interp, objPtr, &resultPtr); |
---|
2661 | if (result == TCL_OK) { |
---|
2662 | if (resultPtr->typePtr == &tclIntType) { |
---|
2663 | *ptr = (double) resultPtr->internalRep.longValue; |
---|
2664 | } else if (resultPtr->typePtr == &tclDoubleType) { |
---|
2665 | *ptr = resultPtr->internalRep.doubleValue; |
---|
2666 | } else { |
---|
2667 | result = Tcl_GetDoubleFromObj(interp, resultPtr, ptr); |
---|
2668 | if (result != TCL_OK) { |
---|
2669 | return result; |
---|
2670 | } |
---|
2671 | } |
---|
2672 | Tcl_DecrRefCount(resultPtr); /* discard the result object */ |
---|
2673 | } |
---|
2674 | return result; |
---|
2675 | } |
---|
2676 | |
---|
2677 | int |
---|
2678 | Tcl_ExprBooleanObj(interp, objPtr, ptr) |
---|
2679 | Tcl_Interp *interp; /* Context in which to evaluate the |
---|
2680 | * expression. */ |
---|
2681 | register Tcl_Obj *objPtr; /* Expression to evaluate. */ |
---|
2682 | int *ptr; /* Where to store 0/1 result. */ |
---|
2683 | { |
---|
2684 | Tcl_Obj *resultPtr; |
---|
2685 | int result; |
---|
2686 | |
---|
2687 | result = Tcl_ExprObj(interp, objPtr, &resultPtr); |
---|
2688 | if (result == TCL_OK) { |
---|
2689 | if (resultPtr->typePtr == &tclIntType) { |
---|
2690 | *ptr = (resultPtr->internalRep.longValue != 0); |
---|
2691 | } else if (resultPtr->typePtr == &tclDoubleType) { |
---|
2692 | *ptr = (resultPtr->internalRep.doubleValue != 0.0); |
---|
2693 | } else { |
---|
2694 | result = Tcl_GetBooleanFromObj(interp, resultPtr, ptr); |
---|
2695 | if (result != TCL_OK) { |
---|
2696 | return result; |
---|
2697 | } |
---|
2698 | } |
---|
2699 | Tcl_DecrRefCount(resultPtr); /* discard the result object */ |
---|
2700 | } |
---|
2701 | return result; |
---|
2702 | } |
---|
2703 | |
---|
2704 | /* |
---|
2705 | *---------------------------------------------------------------------- |
---|
2706 | * |
---|
2707 | * TclInvoke -- |
---|
2708 | * |
---|
2709 | * Invokes a Tcl command, given an argv/argc, from either the |
---|
2710 | * exposed or the hidden sets of commands in the given interpreter. |
---|
2711 | * NOTE: The command is invoked in the current stack frame of |
---|
2712 | * the interpreter, thus it can modify local variables. |
---|
2713 | * |
---|
2714 | * Results: |
---|
2715 | * A standard Tcl result. |
---|
2716 | * |
---|
2717 | * Side effects: |
---|
2718 | * Whatever the command does. |
---|
2719 | * |
---|
2720 | *---------------------------------------------------------------------- |
---|
2721 | */ |
---|
2722 | |
---|
2723 | int |
---|
2724 | TclInvoke(interp, argc, argv, flags) |
---|
2725 | Tcl_Interp *interp; /* Where to invoke the command. */ |
---|
2726 | int argc; /* Count of args. */ |
---|
2727 | register char **argv; /* The arg strings; argv[0] is the name of |
---|
2728 | * the command to invoke. */ |
---|
2729 | int flags; /* Combination of flags controlling the |
---|
2730 | * call: TCL_INVOKE_HIDDEN and |
---|
2731 | * TCL_INVOKE_NO_UNKNOWN. */ |
---|
2732 | { |
---|
2733 | register Tcl_Obj *objPtr; |
---|
2734 | register int i; |
---|
2735 | int length, result; |
---|
2736 | |
---|
2737 | /* |
---|
2738 | * This procedure generates an objv array for object arguments that hold |
---|
2739 | * the argv strings. It starts out with stack-allocated space but uses |
---|
2740 | * dynamically-allocated storage if needed. |
---|
2741 | */ |
---|
2742 | |
---|
2743 | #define NUM_ARGS 20 |
---|
2744 | Tcl_Obj *(objStorage[NUM_ARGS]); |
---|
2745 | register Tcl_Obj **objv = objStorage; |
---|
2746 | |
---|
2747 | /* |
---|
2748 | * Create the object argument array "objv". Make sure objv is large |
---|
2749 | * enough to hold the objc arguments plus 1 extra for the zero |
---|
2750 | * end-of-objv word. |
---|
2751 | */ |
---|
2752 | |
---|
2753 | if ((argc + 1) > NUM_ARGS) { |
---|
2754 | objv = (Tcl_Obj **) |
---|
2755 | ckalloc((unsigned)(argc + 1) * sizeof(Tcl_Obj *)); |
---|
2756 | } |
---|
2757 | |
---|
2758 | for (i = 0; i < argc; i++) { |
---|
2759 | length = strlen(argv[i]); |
---|
2760 | objv[i] = Tcl_NewStringObj(argv[i], length); |
---|
2761 | Tcl_IncrRefCount(objv[i]); |
---|
2762 | } |
---|
2763 | objv[argc] = 0; |
---|
2764 | |
---|
2765 | /* |
---|
2766 | * Use TclObjInterpProc to actually invoke the command. |
---|
2767 | */ |
---|
2768 | |
---|
2769 | result = TclObjInvoke(interp, argc, objv, flags); |
---|
2770 | |
---|
2771 | /* |
---|
2772 | * Move the interpreter's object result to the string result, |
---|
2773 | * then reset the object result. |
---|
2774 | * FAILS IF OBJECT RESULT'S STRING REPRESENTATION CONTAINS NULLS. |
---|
2775 | */ |
---|
2776 | |
---|
2777 | Tcl_SetResult(interp, |
---|
2778 | TclGetStringFromObj(Tcl_GetObjResult(interp), (int *) NULL), |
---|
2779 | TCL_VOLATILE); |
---|
2780 | |
---|
2781 | /* |
---|
2782 | * Decrement the ref counts on the objv elements since we are done |
---|
2783 | * with them. |
---|
2784 | */ |
---|
2785 | |
---|
2786 | for (i = 0; i < argc; i++) { |
---|
2787 | objPtr = objv[i]; |
---|
2788 | Tcl_DecrRefCount(objPtr); |
---|
2789 | } |
---|
2790 | |
---|
2791 | /* |
---|
2792 | * Free the objv array if malloc'ed storage was used. |
---|
2793 | */ |
---|
2794 | |
---|
2795 | if (objv != objStorage) { |
---|
2796 | ckfree((char *) objv); |
---|
2797 | } |
---|
2798 | return result; |
---|
2799 | #undef NUM_ARGS |
---|
2800 | } |
---|
2801 | |
---|
2802 | /* |
---|
2803 | *---------------------------------------------------------------------- |
---|
2804 | * |
---|
2805 | * TclGlobalInvoke -- |
---|
2806 | * |
---|
2807 | * Invokes a Tcl command, given an argv/argc, from either the |
---|
2808 | * exposed or hidden sets of commands in the given interpreter. |
---|
2809 | * NOTE: The command is invoked in the global stack frame of |
---|
2810 | * the interpreter, thus it cannot see any current state on |
---|
2811 | * the stack for that interpreter. |
---|
2812 | * |
---|
2813 | * Results: |
---|
2814 | * A standard Tcl result. |
---|
2815 | * |
---|
2816 | * Side effects: |
---|
2817 | * Whatever the command does. |
---|
2818 | * |
---|
2819 | *---------------------------------------------------------------------- |
---|
2820 | */ |
---|
2821 | |
---|
2822 | int |
---|
2823 | TclGlobalInvoke(interp, argc, argv, flags) |
---|
2824 | Tcl_Interp *interp; /* Where to invoke the command. */ |
---|
2825 | int argc; /* Count of args. */ |
---|
2826 | register char **argv; /* The arg strings; argv[0] is the name of |
---|
2827 | * the command to invoke. */ |
---|
2828 | int flags; /* Combination of flags controlling the |
---|
2829 | * call: TCL_INVOKE_HIDDEN and |
---|
2830 | * TCL_INVOKE_NO_UNKNOWN. */ |
---|
2831 | { |
---|
2832 | register Interp *iPtr = (Interp *) interp; |
---|
2833 | int result; |
---|
2834 | CallFrame *savedVarFramePtr; |
---|
2835 | |
---|
2836 | savedVarFramePtr = iPtr->varFramePtr; |
---|
2837 | iPtr->varFramePtr = NULL; |
---|
2838 | result = TclInvoke(interp, argc, argv, flags); |
---|
2839 | iPtr->varFramePtr = savedVarFramePtr; |
---|
2840 | return result; |
---|
2841 | } |
---|
2842 | |
---|
2843 | /* |
---|
2844 | *---------------------------------------------------------------------- |
---|
2845 | * |
---|
2846 | * TclObjInvokeGlobal -- |
---|
2847 | * |
---|
2848 | * Object version: Invokes a Tcl command, given an objv/objc, from |
---|
2849 | * either the exposed or hidden set of commands in the given |
---|
2850 | * interpreter. |
---|
2851 | * NOTE: The command is invoked in the global stack frame of the |
---|
2852 | * interpreter, thus it cannot see any current state on the |
---|
2853 | * stack of that interpreter. |
---|
2854 | * |
---|
2855 | * Results: |
---|
2856 | * A standard Tcl result. |
---|
2857 | * |
---|
2858 | * Side effects: |
---|
2859 | * Whatever the command does. |
---|
2860 | * |
---|
2861 | *---------------------------------------------------------------------- |
---|
2862 | */ |
---|
2863 | |
---|
2864 | int |
---|
2865 | TclObjInvokeGlobal(interp, objc, objv, flags) |
---|
2866 | Tcl_Interp *interp; /* Interpreter in which command is |
---|
2867 | * to be invoked. */ |
---|
2868 | int objc; /* Count of arguments. */ |
---|
2869 | Tcl_Obj *CONST objv[]; /* Argument value objects; objv[0] |
---|
2870 | * points to the name of the |
---|
2871 | * command to invoke. */ |
---|
2872 | int flags; /* Combination of flags controlling |
---|
2873 | * the call: TCL_INVOKE_HIDDEN and |
---|
2874 | * TCL_INVOKE_NO_UNKNOWN. */ |
---|
2875 | { |
---|
2876 | register Interp *iPtr = (Interp *) interp; |
---|
2877 | int result; |
---|
2878 | CallFrame *savedVarFramePtr; |
---|
2879 | |
---|
2880 | savedVarFramePtr = iPtr->varFramePtr; |
---|
2881 | iPtr->varFramePtr = NULL; |
---|
2882 | result = TclObjInvoke(interp, objc, objv, flags); |
---|
2883 | iPtr->varFramePtr = savedVarFramePtr; |
---|
2884 | return result; |
---|
2885 | } |
---|
2886 | |
---|
2887 | /* |
---|
2888 | *---------------------------------------------------------------------- |
---|
2889 | * |
---|
2890 | * TclObjInvoke -- |
---|
2891 | * |
---|
2892 | * Invokes a Tcl command, given an objv/objc, from either the |
---|
2893 | * exposed or the hidden sets of commands in the given interpreter. |
---|
2894 | * |
---|
2895 | * Results: |
---|
2896 | * A standard Tcl object result. |
---|
2897 | * |
---|
2898 | * Side effects: |
---|
2899 | * Whatever the command does. |
---|
2900 | * |
---|
2901 | *---------------------------------------------------------------------- |
---|
2902 | */ |
---|
2903 | |
---|
2904 | int |
---|
2905 | TclObjInvoke(interp, objc, objv, flags) |
---|
2906 | Tcl_Interp *interp; /* Interpreter in which command is |
---|
2907 | * to be invoked. */ |
---|
2908 | int objc; /* Count of arguments. */ |
---|
2909 | Tcl_Obj *CONST objv[]; /* Argument value objects; objv[0] |
---|
2910 | * points to the name of the |
---|
2911 | * command to invoke. */ |
---|
2912 | int flags; /* Combination of flags controlling |
---|
2913 | * the call: TCL_INVOKE_HIDDEN and |
---|
2914 | * TCL_INVOKE_NO_UNKNOWN. */ |
---|
2915 | { |
---|
2916 | register Interp *iPtr = (Interp *) interp; |
---|
2917 | Tcl_HashTable *hTblPtr; /* Table of hidden commands. */ |
---|
2918 | char *cmdName; /* Name of the command from objv[0]. */ |
---|
2919 | register Tcl_HashEntry *hPtr; |
---|
2920 | Tcl_Command cmd; |
---|
2921 | Command *cmdPtr; |
---|
2922 | int localObjc; /* Used to invoke "unknown" if the */ |
---|
2923 | Tcl_Obj **localObjv = NULL; /* command is not found. */ |
---|
2924 | register int i; |
---|
2925 | int length, result; |
---|
2926 | char *bytes; |
---|
2927 | |
---|
2928 | if (interp == (Tcl_Interp *) NULL) { |
---|
2929 | return TCL_ERROR; |
---|
2930 | } |
---|
2931 | |
---|
2932 | if ((objc < 1) || (objv == (Tcl_Obj **) NULL)) { |
---|
2933 | Tcl_AppendToObj(Tcl_GetObjResult(interp), |
---|
2934 | "illegal argument vector", -1); |
---|
2935 | return TCL_ERROR; |
---|
2936 | } |
---|
2937 | |
---|
2938 | /* |
---|
2939 | * THE FOLLOWING CODE FAILS IF THE STRING REP CONTAINS NULLS. |
---|
2940 | */ |
---|
2941 | |
---|
2942 | cmdName = Tcl_GetStringFromObj(objv[0], (int *) NULL); |
---|
2943 | if (flags & TCL_INVOKE_HIDDEN) { |
---|
2944 | /* |
---|
2945 | * Find the table of hidden commands; error out if none. |
---|
2946 | */ |
---|
2947 | |
---|
2948 | hTblPtr = (Tcl_HashTable *) |
---|
2949 | Tcl_GetAssocData(interp, "tclHiddenCmds", NULL); |
---|
2950 | if (hTblPtr == (Tcl_HashTable *) NULL) { |
---|
2951 | badhiddenCmdToken: |
---|
2952 | Tcl_ResetResult(interp); |
---|
2953 | Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
---|
2954 | "invalid hidden command name \"", cmdName, "\"", |
---|
2955 | (char *) NULL); |
---|
2956 | return TCL_ERROR; |
---|
2957 | } |
---|
2958 | hPtr = Tcl_FindHashEntry(hTblPtr, cmdName); |
---|
2959 | |
---|
2960 | /* |
---|
2961 | * We never invoke "unknown" for hidden commands. |
---|
2962 | */ |
---|
2963 | |
---|
2964 | if (hPtr == NULL) { |
---|
2965 | goto badhiddenCmdToken; |
---|
2966 | } |
---|
2967 | cmdPtr = (Command *) Tcl_GetHashValue(hPtr); |
---|
2968 | } else { |
---|
2969 | cmdPtr = NULL; |
---|
2970 | cmd = Tcl_FindCommand(interp, cmdName, |
---|
2971 | (Tcl_Namespace *) NULL, /*flags*/ TCL_GLOBAL_ONLY); |
---|
2972 | if (cmd != (Tcl_Command) NULL) { |
---|
2973 | cmdPtr = (Command *) cmd; |
---|
2974 | } |
---|
2975 | if (cmdPtr == NULL) { |
---|
2976 | if (!(flags & TCL_INVOKE_NO_UNKNOWN)) { |
---|
2977 | cmd = Tcl_FindCommand(interp, "unknown", |
---|
2978 | (Tcl_Namespace *) NULL, /*flags*/ TCL_GLOBAL_ONLY); |
---|
2979 | if (cmd != (Tcl_Command) NULL) { |
---|
2980 | cmdPtr = (Command *) cmd; |
---|
2981 | } |
---|
2982 | if (cmdPtr != NULL) { |
---|
2983 | localObjc = (objc + 1); |
---|
2984 | localObjv = (Tcl_Obj **) |
---|
2985 | ckalloc((unsigned) (sizeof(Tcl_Obj *) * localObjc)); |
---|
2986 | localObjv[0] = Tcl_NewStringObj("unknown", -1); |
---|
2987 | Tcl_IncrRefCount(localObjv[0]); |
---|
2988 | for (i = 0; i < objc; i++) { |
---|
2989 | localObjv[i+1] = objv[i]; |
---|
2990 | } |
---|
2991 | objc = localObjc; |
---|
2992 | objv = localObjv; |
---|
2993 | } |
---|
2994 | } |
---|
2995 | |
---|
2996 | /* |
---|
2997 | * Check again if we found the command. If not, "unknown" is |
---|
2998 | * not present and we cannot help, or the caller said not to |
---|
2999 | * call "unknown" (they specified TCL_INVOKE_NO_UNKNOWN). |
---|
3000 | */ |
---|
3001 | |
---|
3002 | if (cmdPtr == NULL) { |
---|
3003 | Tcl_ResetResult(interp); |
---|
3004 | Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
---|
3005 | "invalid command name \"", cmdName, "\"", |
---|
3006 | (char *) NULL); |
---|
3007 | return TCL_ERROR; |
---|
3008 | } |
---|
3009 | } |
---|
3010 | } |
---|
3011 | |
---|
3012 | /* |
---|
3013 | * Invoke the command procedure. First reset the interpreter's string |
---|
3014 | * and object results to their default empty values since they could |
---|
3015 | * have gotten changed by earlier invocations. |
---|
3016 | */ |
---|
3017 | |
---|
3018 | Tcl_ResetResult(interp); |
---|
3019 | iPtr->cmdCount++; |
---|
3020 | result = (*cmdPtr->objProc)(cmdPtr->objClientData, interp, objc, objv); |
---|
3021 | |
---|
3022 | /* |
---|
3023 | * If an error occurred, record information about what was being |
---|
3024 | * executed when the error occurred. |
---|
3025 | */ |
---|
3026 | |
---|
3027 | if ((result == TCL_ERROR) && !(iPtr->flags & ERR_ALREADY_LOGGED)) { |
---|
3028 | Tcl_DString ds; |
---|
3029 | |
---|
3030 | Tcl_DStringInit(&ds); |
---|
3031 | if (!(iPtr->flags & ERR_IN_PROGRESS)) { |
---|
3032 | Tcl_DStringAppend(&ds, "\n while invoking\n\"", -1); |
---|
3033 | } else { |
---|
3034 | Tcl_DStringAppend(&ds, "\n invoked from within\n\"", -1); |
---|
3035 | } |
---|
3036 | for (i = 0; i < objc; i++) { |
---|
3037 | bytes = Tcl_GetStringFromObj(objv[i], &length); |
---|
3038 | Tcl_DStringAppend(&ds, bytes, length); |
---|
3039 | if (i < (objc - 1)) { |
---|
3040 | Tcl_DStringAppend(&ds, " ", -1); |
---|
3041 | } else if (Tcl_DStringLength(&ds) > 100) { |
---|
3042 | Tcl_DStringSetLength(&ds, 100); |
---|
3043 | Tcl_DStringAppend(&ds, "...", -1); |
---|
3044 | break; |
---|
3045 | } |
---|
3046 | } |
---|
3047 | |
---|
3048 | Tcl_DStringAppend(&ds, "\"", -1); |
---|
3049 | Tcl_AddObjErrorInfo(interp, Tcl_DStringValue(&ds), -1); |
---|
3050 | Tcl_DStringFree(&ds); |
---|
3051 | iPtr->flags &= ~ERR_ALREADY_LOGGED; |
---|
3052 | } |
---|
3053 | |
---|
3054 | /* |
---|
3055 | * Free any locally allocated storage used to call "unknown". |
---|
3056 | */ |
---|
3057 | |
---|
3058 | if (localObjv != (Tcl_Obj **) NULL) { |
---|
3059 | ckfree((char *) localObjv); |
---|
3060 | } |
---|
3061 | return result; |
---|
3062 | } |
---|
3063 | |
---|
3064 | /* |
---|
3065 | *-------------------------------------------------------------- |
---|
3066 | * |
---|
3067 | * Tcl_ExprString -- |
---|
3068 | * |
---|
3069 | * Evaluate an expression in a string and return its value in string |
---|
3070 | * form. |
---|
3071 | * |
---|
3072 | * Results: |
---|
3073 | * A standard Tcl result. If the result is TCL_OK, then the |
---|
3074 | * interpreter's result is set to the string value of the |
---|
3075 | * expression. If the result is TCL_OK, then interp->result |
---|
3076 | * contains an error message. |
---|
3077 | * |
---|
3078 | * Side effects: |
---|
3079 | * A Tcl object is allocated to hold a copy of the expression string. |
---|
3080 | * This expression object is passed to Tcl_ExprObj and then |
---|
3081 | * deallocated. |
---|
3082 | * |
---|
3083 | *-------------------------------------------------------------- |
---|
3084 | */ |
---|
3085 | |
---|
3086 | int |
---|
3087 | Tcl_ExprString(interp, string) |
---|
3088 | Tcl_Interp *interp; /* Context in which to evaluate the |
---|
3089 | * expression. */ |
---|
3090 | char *string; /* Expression to evaluate. */ |
---|
3091 | { |
---|
3092 | register Tcl_Obj *exprPtr; |
---|
3093 | Tcl_Obj *resultPtr; |
---|
3094 | int length = strlen(string); |
---|
3095 | char buf[100]; |
---|
3096 | int result = TCL_OK; |
---|
3097 | |
---|
3098 | if (length > 0) { |
---|
3099 | TclNewObj(exprPtr); |
---|
3100 | TclInitStringRep(exprPtr, string, length); |
---|
3101 | Tcl_IncrRefCount(exprPtr); |
---|
3102 | |
---|
3103 | result = Tcl_ExprObj(interp, exprPtr, &resultPtr); |
---|
3104 | if (result == TCL_OK) { |
---|
3105 | /* |
---|
3106 | * Set the interpreter's string result from the result object. |
---|
3107 | */ |
---|
3108 | |
---|
3109 | if (resultPtr->typePtr == &tclIntType) { |
---|
3110 | sprintf(buf, "%ld", resultPtr->internalRep.longValue); |
---|
3111 | Tcl_SetResult(interp, buf, TCL_VOLATILE); |
---|
3112 | } else if (resultPtr->typePtr == &tclDoubleType) { |
---|
3113 | Tcl_PrintDouble((Tcl_Interp *) NULL, |
---|
3114 | resultPtr->internalRep.doubleValue, buf); |
---|
3115 | Tcl_SetResult(interp, buf, TCL_VOLATILE); |
---|
3116 | } else { |
---|
3117 | /* |
---|
3118 | * Set interpreter's string result from the result object. |
---|
3119 | * FAILS IF OBJECT RESULT'S STRING REPRESENTATION HAS NULLS. |
---|
3120 | */ |
---|
3121 | |
---|
3122 | Tcl_SetResult(interp, |
---|
3123 | TclGetStringFromObj(resultPtr, (int *) NULL), |
---|
3124 | TCL_VOLATILE); |
---|
3125 | } |
---|
3126 | Tcl_DecrRefCount(resultPtr); /* discard the result object */ |
---|
3127 | } else { |
---|
3128 | /* |
---|
3129 | * Move the interpreter's object result to the string result, |
---|
3130 | * then reset the object result. |
---|
3131 | * FAILS IF OBJECT RESULT'S STRING REPRESENTATION HAS NULLS. |
---|
3132 | */ |
---|
3133 | |
---|
3134 | Tcl_SetResult(interp, |
---|
3135 | TclGetStringFromObj(Tcl_GetObjResult(interp), |
---|
3136 | (int *) NULL), |
---|
3137 | TCL_VOLATILE); |
---|
3138 | } |
---|
3139 | Tcl_DecrRefCount(exprPtr); /* discard the expression object */ |
---|
3140 | } else { |
---|
3141 | /* |
---|
3142 | * An empty string. Just set the interpreter's result to 0. |
---|
3143 | */ |
---|
3144 | |
---|
3145 | Tcl_SetResult(interp, "0", TCL_VOLATILE); |
---|
3146 | } |
---|
3147 | return result; |
---|
3148 | } |
---|
3149 | |
---|
3150 | /* |
---|
3151 | *-------------------------------------------------------------- |
---|
3152 | * |
---|
3153 | * Tcl_ExprObj -- |
---|
3154 | * |
---|
3155 | * Evaluate an expression in a Tcl_Obj. |
---|
3156 | * |
---|
3157 | * Results: |
---|
3158 | * A standard Tcl object result. If the result is other than TCL_OK, |
---|
3159 | * then the interpreter's result contains an error message. If the |
---|
3160 | * result is TCL_OK, then a pointer to the expression's result value |
---|
3161 | * object is stored in resultPtrPtr. In that case, the object's ref |
---|
3162 | * count is incremented to reflect the reference returned to the |
---|
3163 | * caller; the caller is then responsible for the resulting object |
---|
3164 | * and must, for example, decrement the ref count when it is finished |
---|
3165 | * with the object. |
---|
3166 | * |
---|
3167 | * Side effects: |
---|
3168 | * Any side effects caused by subcommands in the expression, if any. |
---|
3169 | * The interpreter result is not modified unless there is an error. |
---|
3170 | * |
---|
3171 | *-------------------------------------------------------------- |
---|
3172 | */ |
---|
3173 | |
---|
3174 | int |
---|
3175 | Tcl_ExprObj(interp, objPtr, resultPtrPtr) |
---|
3176 | Tcl_Interp *interp; /* Context in which to evaluate the |
---|
3177 | * expression. */ |
---|
3178 | register Tcl_Obj *objPtr; /* Points to Tcl object containing |
---|
3179 | * expression to evaluate. */ |
---|
3180 | Tcl_Obj **resultPtrPtr; /* Where the Tcl_Obj* that is the expression |
---|
3181 | * result is stored if no errors occur. */ |
---|
3182 | { |
---|
3183 | Interp *iPtr = (Interp *) interp; |
---|
3184 | CompileEnv compEnv; /* Compilation environment structure |
---|
3185 | * allocated in frame. */ |
---|
3186 | register ByteCode *codePtr = NULL; |
---|
3187 | /* Tcl Internal type of bytecode. |
---|
3188 | * Initialized to avoid compiler warning. */ |
---|
3189 | AuxData *auxDataPtr; |
---|
3190 | Interp dummy; |
---|
3191 | Tcl_Obj *saveObjPtr; |
---|
3192 | char *string; |
---|
3193 | int result; |
---|
3194 | int i; |
---|
3195 | |
---|
3196 | /* |
---|
3197 | * Get the ByteCode from the object. If it exists, make sure it hasn't |
---|
3198 | * been invalidated by, e.g., someone redefining a command with a |
---|
3199 | * compile procedure (this might make the compiled code wrong). If |
---|
3200 | * necessary, convert the object to be a ByteCode object and compile it. |
---|
3201 | * Also, if the code was compiled in/for a different interpreter, we |
---|
3202 | * recompile it. |
---|
3203 | * |
---|
3204 | * Precompiled expressions, however, are immutable and therefore |
---|
3205 | * they are not recompiled, even if the epoch has changed. |
---|
3206 | * |
---|
3207 | * THIS FAILS IF THE OBJECT'S STRING REP HAS A NULL BYTE. |
---|
3208 | */ |
---|
3209 | |
---|
3210 | if (objPtr->typePtr == &tclByteCodeType) { |
---|
3211 | codePtr = (ByteCode *) objPtr->internalRep.otherValuePtr; |
---|
3212 | if ((codePtr->iPtr != iPtr) |
---|
3213 | || (codePtr->compileEpoch != iPtr->compileEpoch)) { |
---|
3214 | if (codePtr->flags & TCL_BYTECODE_PRECOMPILED) { |
---|
3215 | if (codePtr->iPtr != iPtr) { |
---|
3216 | panic("Tcl_ExprObj: compiled expression jumped interps"); |
---|
3217 | } |
---|
3218 | codePtr->compileEpoch = iPtr->compileEpoch; |
---|
3219 | } else { |
---|
3220 | tclByteCodeType.freeIntRepProc(objPtr); |
---|
3221 | objPtr->typePtr = (Tcl_ObjType *) NULL; |
---|
3222 | } |
---|
3223 | } |
---|
3224 | } |
---|
3225 | if (objPtr->typePtr != &tclByteCodeType) { |
---|
3226 | int length; |
---|
3227 | string = Tcl_GetStringFromObj(objPtr, &length); |
---|
3228 | TclInitCompileEnv(interp, &compEnv, string); |
---|
3229 | result = TclCompileExpr(interp, string, string + length, |
---|
3230 | /*flags*/ 0, &compEnv); |
---|
3231 | if (result == TCL_OK) { |
---|
3232 | /* |
---|
3233 | * If the expression yielded no instructions (e.g., was empty), |
---|
3234 | * push an integer zero object as the expressions's result. |
---|
3235 | */ |
---|
3236 | |
---|
3237 | if (compEnv.codeNext == NULL) { |
---|
3238 | int objIndex = TclObjIndexForString("0", 0, |
---|
3239 | /*allocStrRep*/ 0, /*inHeap*/ 0, &compEnv); |
---|
3240 | Tcl_Obj *objPtr = compEnv.objArrayPtr[objIndex]; |
---|
3241 | |
---|
3242 | Tcl_InvalidateStringRep(objPtr); |
---|
3243 | objPtr->internalRep.longValue = 0; |
---|
3244 | objPtr->typePtr = &tclIntType; |
---|
3245 | |
---|
3246 | TclEmitPush(objIndex, &compEnv); |
---|
3247 | } |
---|
3248 | |
---|
3249 | /* |
---|
3250 | * Add done instruction at the end of the instruction sequence. |
---|
3251 | */ |
---|
3252 | |
---|
3253 | TclEmitOpcode(INST_DONE, &compEnv); |
---|
3254 | |
---|
3255 | TclInitByteCodeObj(objPtr, &compEnv); |
---|
3256 | codePtr = (ByteCode *) objPtr->internalRep.otherValuePtr; |
---|
3257 | if (tclTraceCompile == 2) { |
---|
3258 | TclPrintByteCodeObj(interp, objPtr); |
---|
3259 | } |
---|
3260 | TclFreeCompileEnv(&compEnv); |
---|
3261 | } else { |
---|
3262 | /* |
---|
3263 | * Compilation errors. Decrement the ref counts on any objects |
---|
3264 | * in the object array before freeing the compilation |
---|
3265 | * environment. |
---|
3266 | */ |
---|
3267 | |
---|
3268 | for (i = 0; i < compEnv.objArrayNext; i++) { |
---|
3269 | Tcl_Obj *elemPtr = compEnv.objArrayPtr[i]; |
---|
3270 | Tcl_DecrRefCount(elemPtr); |
---|
3271 | } |
---|
3272 | |
---|
3273 | auxDataPtr = compEnv.auxDataArrayPtr; |
---|
3274 | for (i = 0; i < compEnv.auxDataArrayNext; i++) { |
---|
3275 | if (auxDataPtr->type->freeProc != NULL) { |
---|
3276 | auxDataPtr->type->freeProc(auxDataPtr->clientData); |
---|
3277 | } |
---|
3278 | auxDataPtr++; |
---|
3279 | } |
---|
3280 | TclFreeCompileEnv(&compEnv); |
---|
3281 | return result; |
---|
3282 | } |
---|
3283 | } |
---|
3284 | |
---|
3285 | /* |
---|
3286 | * Execute the expression after first saving the interpreter's result. |
---|
3287 | */ |
---|
3288 | |
---|
3289 | dummy.objResultPtr = Tcl_NewObj(); |
---|
3290 | Tcl_IncrRefCount(dummy.objResultPtr); |
---|
3291 | if (interp->freeProc == 0) { |
---|
3292 | dummy.freeProc = (Tcl_FreeProc *) 0; |
---|
3293 | dummy.result = ""; |
---|
3294 | Tcl_SetResult((Tcl_Interp *) &dummy, interp->result, |
---|
3295 | TCL_VOLATILE); |
---|
3296 | } else { |
---|
3297 | dummy.freeProc = interp->freeProc; |
---|
3298 | dummy.result = interp->result; |
---|
3299 | interp->freeProc = (Tcl_FreeProc *) 0; |
---|
3300 | } |
---|
3301 | |
---|
3302 | saveObjPtr = Tcl_GetObjResult(interp); |
---|
3303 | Tcl_IncrRefCount(saveObjPtr); |
---|
3304 | |
---|
3305 | /* |
---|
3306 | * Increment the code's ref count while it is being executed. If |
---|
3307 | * afterwards no references to it remain, free the code. |
---|
3308 | */ |
---|
3309 | |
---|
3310 | codePtr->refCount++; |
---|
3311 | result = TclExecuteByteCode(interp, codePtr); |
---|
3312 | codePtr->refCount--; |
---|
3313 | if (codePtr->refCount <= 0) { |
---|
3314 | TclCleanupByteCode(codePtr); |
---|
3315 | } |
---|
3316 | |
---|
3317 | /* |
---|
3318 | * If the expression evaluated successfully, store a pointer to its |
---|
3319 | * value object in resultPtrPtr then restore the old interpreter result. |
---|
3320 | * We increment the object's ref count to reflect the reference that we |
---|
3321 | * are returning to the caller. We also decrement the ref count of the |
---|
3322 | * interpreter's result object after calling Tcl_SetResult since we |
---|
3323 | * next store into that field directly. |
---|
3324 | */ |
---|
3325 | |
---|
3326 | if (result == TCL_OK) { |
---|
3327 | *resultPtrPtr = iPtr->objResultPtr; |
---|
3328 | Tcl_IncrRefCount(iPtr->objResultPtr); |
---|
3329 | |
---|
3330 | Tcl_SetResult(interp, dummy.result, |
---|
3331 | ((dummy.freeProc == 0) ? TCL_VOLATILE : dummy.freeProc)); |
---|
3332 | Tcl_DecrRefCount(iPtr->objResultPtr); |
---|
3333 | iPtr->objResultPtr = saveObjPtr; |
---|
3334 | } else { |
---|
3335 | Tcl_DecrRefCount(saveObjPtr); |
---|
3336 | Tcl_FreeResult((Tcl_Interp *) &dummy); |
---|
3337 | } |
---|
3338 | |
---|
3339 | Tcl_DecrRefCount(dummy.objResultPtr); |
---|
3340 | dummy.objResultPtr = NULL; |
---|
3341 | return result; |
---|
3342 | } |
---|
3343 | |
---|
3344 | /* |
---|
3345 | *---------------------------------------------------------------------- |
---|
3346 | * |
---|
3347 | * Tcl_CreateTrace -- |
---|
3348 | * |
---|
3349 | * Arrange for a procedure to be called to trace command execution. |
---|
3350 | * |
---|
3351 | * Results: |
---|
3352 | * The return value is a token for the trace, which may be passed |
---|
3353 | * to Tcl_DeleteTrace to eliminate the trace. |
---|
3354 | * |
---|
3355 | * Side effects: |
---|
3356 | * From now on, proc will be called just before a command procedure |
---|
3357 | * is called to execute a Tcl command. Calls to proc will have the |
---|
3358 | * following form: |
---|
3359 | * |
---|
3360 | * void |
---|
3361 | * proc(clientData, interp, level, command, cmdProc, cmdClientData, |
---|
3362 | * argc, argv) |
---|
3363 | * ClientData clientData; |
---|
3364 | * Tcl_Interp *interp; |
---|
3365 | * int level; |
---|
3366 | * char *command; |
---|
3367 | * int (*cmdProc)(); |
---|
3368 | * ClientData cmdClientData; |
---|
3369 | * int argc; |
---|
3370 | * char **argv; |
---|
3371 | * { |
---|
3372 | * } |
---|
3373 | * |
---|
3374 | * The clientData and interp arguments to proc will be the same |
---|
3375 | * as the corresponding arguments to this procedure. Level gives |
---|
3376 | * the nesting level of command interpretation for this interpreter |
---|
3377 | * (0 corresponds to top level). Command gives the ASCII text of |
---|
3378 | * the raw command, cmdProc and cmdClientData give the procedure that |
---|
3379 | * will be called to process the command and the ClientData value it |
---|
3380 | * will receive, and argc and argv give the arguments to the |
---|
3381 | * command, after any argument parsing and substitution. Proc |
---|
3382 | * does not return a value. |
---|
3383 | * |
---|
3384 | *---------------------------------------------------------------------- |
---|
3385 | */ |
---|
3386 | |
---|
3387 | Tcl_Trace |
---|
3388 | Tcl_CreateTrace(interp, level, proc, clientData) |
---|
3389 | Tcl_Interp *interp; /* Interpreter in which to create trace. */ |
---|
3390 | int level; /* Only call proc for commands at nesting |
---|
3391 | * level<=argument level (1=>top level). */ |
---|
3392 | Tcl_CmdTraceProc *proc; /* Procedure to call before executing each |
---|
3393 | * command. */ |
---|
3394 | ClientData clientData; /* Arbitrary value word to pass to proc. */ |
---|
3395 | { |
---|
3396 | register Trace *tracePtr; |
---|
3397 | register Interp *iPtr = (Interp *) interp; |
---|
3398 | |
---|
3399 | /* |
---|
3400 | * Invalidate existing compiled code for this interpreter and arrange |
---|
3401 | * (by setting the DONT_COMPILE_CMDS_INLINE flag) that when compiling |
---|
3402 | * new code, no commands will be compiled inline (i.e., into an inline |
---|
3403 | * sequence of instructions). We do this because commands that were |
---|
3404 | * compiled inline will never result in a command trace being called. |
---|
3405 | */ |
---|
3406 | |
---|
3407 | iPtr->compileEpoch++; |
---|
3408 | iPtr->flags |= DONT_COMPILE_CMDS_INLINE; |
---|
3409 | |
---|
3410 | tracePtr = (Trace *) ckalloc(sizeof(Trace)); |
---|
3411 | tracePtr->level = level; |
---|
3412 | tracePtr->proc = proc; |
---|
3413 | tracePtr->clientData = clientData; |
---|
3414 | tracePtr->nextPtr = iPtr->tracePtr; |
---|
3415 | iPtr->tracePtr = tracePtr; |
---|
3416 | |
---|
3417 | return (Tcl_Trace) tracePtr; |
---|
3418 | } |
---|
3419 | |
---|
3420 | /* |
---|
3421 | *---------------------------------------------------------------------- |
---|
3422 | * |
---|
3423 | * Tcl_DeleteTrace -- |
---|
3424 | * |
---|
3425 | * Remove a trace. |
---|
3426 | * |
---|
3427 | * Results: |
---|
3428 | * None. |
---|
3429 | * |
---|
3430 | * Side effects: |
---|
3431 | * From now on there will be no more calls to the procedure given |
---|
3432 | * in trace. |
---|
3433 | * |
---|
3434 | *---------------------------------------------------------------------- |
---|
3435 | */ |
---|
3436 | |
---|
3437 | void |
---|
3438 | Tcl_DeleteTrace(interp, trace) |
---|
3439 | Tcl_Interp *interp; /* Interpreter that contains trace. */ |
---|
3440 | Tcl_Trace trace; /* Token for trace (returned previously by |
---|
3441 | * Tcl_CreateTrace). */ |
---|
3442 | { |
---|
3443 | register Interp *iPtr = (Interp *) interp; |
---|
3444 | register Trace *tracePtr = (Trace *) trace; |
---|
3445 | register Trace *tracePtr2; |
---|
3446 | |
---|
3447 | if (iPtr->tracePtr == tracePtr) { |
---|
3448 | iPtr->tracePtr = tracePtr->nextPtr; |
---|
3449 | ckfree((char *) tracePtr); |
---|
3450 | } else { |
---|
3451 | for (tracePtr2 = iPtr->tracePtr; tracePtr2 != NULL; |
---|
3452 | tracePtr2 = tracePtr2->nextPtr) { |
---|
3453 | if (tracePtr2->nextPtr == tracePtr) { |
---|
3454 | tracePtr2->nextPtr = tracePtr->nextPtr; |
---|
3455 | ckfree((char *) tracePtr); |
---|
3456 | break; |
---|
3457 | } |
---|
3458 | } |
---|
3459 | } |
---|
3460 | |
---|
3461 | if (iPtr->tracePtr == NULL) { |
---|
3462 | /* |
---|
3463 | * When compiling new code, allow commands to be compiled inline. |
---|
3464 | */ |
---|
3465 | |
---|
3466 | iPtr->flags &= ~DONT_COMPILE_CMDS_INLINE; |
---|
3467 | } |
---|
3468 | } |
---|
3469 | |
---|
3470 | /* |
---|
3471 | *---------------------------------------------------------------------- |
---|
3472 | * |
---|
3473 | * Tcl_AddErrorInfo -- |
---|
3474 | * |
---|
3475 | * Add information to the "errorInfo" variable that describes the |
---|
3476 | * current error. |
---|
3477 | * |
---|
3478 | * Results: |
---|
3479 | * None. |
---|
3480 | * |
---|
3481 | * Side effects: |
---|
3482 | * The contents of message are added to the "errorInfo" variable. |
---|
3483 | * If Tcl_Eval has been called since the current value of errorInfo |
---|
3484 | * was set, errorInfo is cleared before adding the new message. |
---|
3485 | * If we are just starting to log an error, errorInfo is initialized |
---|
3486 | * from the error message in the interpreter's result. |
---|
3487 | * |
---|
3488 | *---------------------------------------------------------------------- |
---|
3489 | */ |
---|
3490 | |
---|
3491 | void |
---|
3492 | Tcl_AddErrorInfo(interp, message) |
---|
3493 | Tcl_Interp *interp; /* Interpreter to which error information |
---|
3494 | * pertains. */ |
---|
3495 | char *message; /* Message to record. */ |
---|
3496 | { |
---|
3497 | Tcl_AddObjErrorInfo(interp, message, -1); |
---|
3498 | } |
---|
3499 | |
---|
3500 | /* |
---|
3501 | *---------------------------------------------------------------------- |
---|
3502 | * |
---|
3503 | * Tcl_AddObjErrorInfo -- |
---|
3504 | * |
---|
3505 | * Add information to the "errorInfo" variable that describes the |
---|
3506 | * current error. This routine differs from Tcl_AddErrorInfo by |
---|
3507 | * taking a byte pointer and length. |
---|
3508 | * |
---|
3509 | * Results: |
---|
3510 | * None. |
---|
3511 | * |
---|
3512 | * Side effects: |
---|
3513 | * "length" bytes from "message" are added to the "errorInfo" variable. |
---|
3514 | * If "length" is negative, use bytes up to the first NULL byte. |
---|
3515 | * If Tcl_EvalObj has been called since the current value of errorInfo |
---|
3516 | * was set, errorInfo is cleared before adding the new message. |
---|
3517 | * If we are just starting to log an error, errorInfo is initialized |
---|
3518 | * from the error message in the interpreter's result. |
---|
3519 | * |
---|
3520 | *---------------------------------------------------------------------- |
---|
3521 | */ |
---|
3522 | |
---|
3523 | void |
---|
3524 | Tcl_AddObjErrorInfo(interp, message, length) |
---|
3525 | Tcl_Interp *interp; /* Interpreter to which error information |
---|
3526 | * pertains. */ |
---|
3527 | char *message; /* Points to the first byte of an array of |
---|
3528 | * bytes of the message. */ |
---|
3529 | register int length; /* The number of bytes in the message. |
---|
3530 | * If < 0, then append all bytes up to a |
---|
3531 | * NULL byte. */ |
---|
3532 | { |
---|
3533 | register Interp *iPtr = (Interp *) interp; |
---|
3534 | Tcl_Obj *namePtr, *messagePtr; |
---|
3535 | |
---|
3536 | /* |
---|
3537 | * If we are just starting to log an error, errorInfo is initialized |
---|
3538 | * from the error message in the interpreter's result. |
---|
3539 | */ |
---|
3540 | |
---|
3541 | namePtr = Tcl_NewStringObj("errorInfo", -1); |
---|
3542 | Tcl_IncrRefCount(namePtr); |
---|
3543 | |
---|
3544 | if (!(iPtr->flags & ERR_IN_PROGRESS)) { /* just starting to log error */ |
---|
3545 | iPtr->flags |= ERR_IN_PROGRESS; |
---|
3546 | |
---|
3547 | if (iPtr->result[0] == 0) { |
---|
3548 | (void) Tcl_ObjSetVar2(interp, namePtr, (Tcl_Obj *) NULL, |
---|
3549 | iPtr->objResultPtr, TCL_GLOBAL_ONLY); |
---|
3550 | } else { /* use the string result */ |
---|
3551 | Tcl_SetVar2(interp, "errorInfo", (char *) NULL, interp->result, |
---|
3552 | TCL_GLOBAL_ONLY); |
---|
3553 | } |
---|
3554 | |
---|
3555 | /* |
---|
3556 | * If the errorCode variable wasn't set by the code that generated |
---|
3557 | * the error, set it to "NONE". |
---|
3558 | */ |
---|
3559 | |
---|
3560 | if (!(iPtr->flags & ERROR_CODE_SET)) { |
---|
3561 | (void) Tcl_SetVar2(interp, "errorCode", (char *) NULL, "NONE", |
---|
3562 | TCL_GLOBAL_ONLY); |
---|
3563 | } |
---|
3564 | } |
---|
3565 | |
---|
3566 | /* |
---|
3567 | * Now append "message" to the end of errorInfo. |
---|
3568 | */ |
---|
3569 | |
---|
3570 | if (length != 0) { |
---|
3571 | messagePtr = Tcl_NewStringObj(message, length); |
---|
3572 | Tcl_IncrRefCount(messagePtr); |
---|
3573 | Tcl_ObjSetVar2(interp, namePtr, (Tcl_Obj *) NULL, messagePtr, |
---|
3574 | (TCL_GLOBAL_ONLY | TCL_APPEND_VALUE)); |
---|
3575 | Tcl_DecrRefCount(messagePtr); /* free msg object appended above */ |
---|
3576 | } |
---|
3577 | |
---|
3578 | Tcl_DecrRefCount(namePtr); /* free the name object */ |
---|
3579 | } |
---|
3580 | |
---|
3581 | /* |
---|
3582 | *---------------------------------------------------------------------- |
---|
3583 | * |
---|
3584 | * Tcl_VarEval -- |
---|
3585 | * |
---|
3586 | * Given a variable number of string arguments, concatenate them |
---|
3587 | * all together and execute the result as a Tcl command. |
---|
3588 | * |
---|
3589 | * Results: |
---|
3590 | * A standard Tcl return result. An error message or other |
---|
3591 | * result may be left in interp->result. |
---|
3592 | * |
---|
3593 | * Side effects: |
---|
3594 | * Depends on what was done by the command. |
---|
3595 | * |
---|
3596 | *---------------------------------------------------------------------- |
---|
3597 | */ |
---|
3598 | /* VARARGS2 */ /* ARGSUSED */ |
---|
3599 | int |
---|
3600 | Tcl_VarEval TCL_VARARGS_DEF(Tcl_Interp *,arg1) |
---|
3601 | { |
---|
3602 | va_list argList; |
---|
3603 | Tcl_DString buf; |
---|
3604 | char *string; |
---|
3605 | Tcl_Interp *interp; |
---|
3606 | int result; |
---|
3607 | |
---|
3608 | /* |
---|
3609 | * Copy the strings one after the other into a single larger |
---|
3610 | * string. Use stack-allocated space for small commands, but if |
---|
3611 | * the command gets too large than call ckalloc to create the |
---|
3612 | * space. |
---|
3613 | */ |
---|
3614 | |
---|
3615 | interp = TCL_VARARGS_START(Tcl_Interp *,arg1,argList); |
---|
3616 | Tcl_DStringInit(&buf); |
---|
3617 | while (1) { |
---|
3618 | string = va_arg(argList, char *); |
---|
3619 | if (string == NULL) { |
---|
3620 | break; |
---|
3621 | } |
---|
3622 | Tcl_DStringAppend(&buf, string, -1); |
---|
3623 | } |
---|
3624 | va_end(argList); |
---|
3625 | |
---|
3626 | result = Tcl_Eval(interp, Tcl_DStringValue(&buf)); |
---|
3627 | Tcl_DStringFree(&buf); |
---|
3628 | return result; |
---|
3629 | } |
---|
3630 | |
---|
3631 | /* |
---|
3632 | *---------------------------------------------------------------------- |
---|
3633 | * |
---|
3634 | * Tcl_GlobalEval -- |
---|
3635 | * |
---|
3636 | * Evaluate a command at global level in an interpreter. |
---|
3637 | * |
---|
3638 | * Results: |
---|
3639 | * A standard Tcl result is returned, and interp->result is |
---|
3640 | * modified accordingly. |
---|
3641 | * |
---|
3642 | * Side effects: |
---|
3643 | * The command string is executed in interp, and the execution |
---|
3644 | * is carried out in the variable context of global level (no |
---|
3645 | * procedures active), just as if an "uplevel #0" command were |
---|
3646 | * being executed. |
---|
3647 | * |
---|
3648 | *---------------------------------------------------------------------- |
---|
3649 | */ |
---|
3650 | |
---|
3651 | int |
---|
3652 | Tcl_GlobalEval(interp, command) |
---|
3653 | Tcl_Interp *interp; /* Interpreter in which to evaluate command. */ |
---|
3654 | char *command; /* Command to evaluate. */ |
---|
3655 | { |
---|
3656 | register Interp *iPtr = (Interp *) interp; |
---|
3657 | int result; |
---|
3658 | CallFrame *savedVarFramePtr; |
---|
3659 | |
---|
3660 | savedVarFramePtr = iPtr->varFramePtr; |
---|
3661 | iPtr->varFramePtr = NULL; |
---|
3662 | result = Tcl_Eval(interp, command); |
---|
3663 | iPtr->varFramePtr = savedVarFramePtr; |
---|
3664 | return result; |
---|
3665 | } |
---|
3666 | |
---|
3667 | /* |
---|
3668 | *---------------------------------------------------------------------- |
---|
3669 | * |
---|
3670 | * Tcl_GlobalEvalObj -- |
---|
3671 | * |
---|
3672 | * Execute Tcl commands stored in a Tcl object at global level in |
---|
3673 | * an interpreter. These commands are compiled into bytecodes if |
---|
3674 | * necessary. |
---|
3675 | * |
---|
3676 | * Results: |
---|
3677 | * A standard Tcl result is returned, and the interpreter's result |
---|
3678 | * contains a Tcl object value to supplement the return code. |
---|
3679 | * |
---|
3680 | * Side effects: |
---|
3681 | * The object is converted, if necessary, to a ByteCode object that |
---|
3682 | * holds the bytecode instructions for the commands. Executing the |
---|
3683 | * commands will almost certainly have side effects that depend on |
---|
3684 | * those commands. |
---|
3685 | * |
---|
3686 | * The commands are executed in interp, and the execution |
---|
3687 | * is carried out in the variable context of global level (no |
---|
3688 | * procedures active), just as if an "uplevel #0" command were |
---|
3689 | * being executed. |
---|
3690 | * |
---|
3691 | *---------------------------------------------------------------------- |
---|
3692 | */ |
---|
3693 | |
---|
3694 | int |
---|
3695 | Tcl_GlobalEvalObj(interp, objPtr) |
---|
3696 | Tcl_Interp *interp; /* Interpreter in which to evaluate |
---|
3697 | * commands. */ |
---|
3698 | Tcl_Obj *objPtr; /* Pointer to object containing commands |
---|
3699 | * to execute. */ |
---|
3700 | { |
---|
3701 | register Interp *iPtr = (Interp *) interp; |
---|
3702 | int result; |
---|
3703 | CallFrame *savedVarFramePtr; |
---|
3704 | |
---|
3705 | savedVarFramePtr = iPtr->varFramePtr; |
---|
3706 | iPtr->varFramePtr = NULL; |
---|
3707 | result = Tcl_EvalObj(interp, objPtr); |
---|
3708 | iPtr->varFramePtr = savedVarFramePtr; |
---|
3709 | return result; |
---|
3710 | } |
---|
3711 | |
---|
3712 | /* |
---|
3713 | *---------------------------------------------------------------------- |
---|
3714 | * |
---|
3715 | * Tcl_SetRecursionLimit -- |
---|
3716 | * |
---|
3717 | * Set the maximum number of recursive calls that may be active |
---|
3718 | * for an interpreter at once. |
---|
3719 | * |
---|
3720 | * Results: |
---|
3721 | * The return value is the old limit on nesting for interp. |
---|
3722 | * |
---|
3723 | * Side effects: |
---|
3724 | * None. |
---|
3725 | * |
---|
3726 | *---------------------------------------------------------------------- |
---|
3727 | */ |
---|
3728 | |
---|
3729 | int |
---|
3730 | Tcl_SetRecursionLimit(interp, depth) |
---|
3731 | Tcl_Interp *interp; /* Interpreter whose nesting limit |
---|
3732 | * is to be set. */ |
---|
3733 | int depth; /* New value for maximimum depth. */ |
---|
3734 | { |
---|
3735 | Interp *iPtr = (Interp *) interp; |
---|
3736 | int old; |
---|
3737 | |
---|
3738 | old = iPtr->maxNestingDepth; |
---|
3739 | if (depth > 0) { |
---|
3740 | iPtr->maxNestingDepth = depth; |
---|
3741 | } |
---|
3742 | return old; |
---|
3743 | } |
---|
3744 | |
---|
3745 | /* |
---|
3746 | *---------------------------------------------------------------------- |
---|
3747 | * |
---|
3748 | * Tcl_AllowExceptions -- |
---|
3749 | * |
---|
3750 | * Sets a flag in an interpreter so that exceptions can occur |
---|
3751 | * in the next call to Tcl_Eval without them being turned into |
---|
3752 | * errors. |
---|
3753 | * |
---|
3754 | * Results: |
---|
3755 | * None. |
---|
3756 | * |
---|
3757 | * Side effects: |
---|
3758 | * The TCL_ALLOW_EXCEPTIONS flag gets set in the interpreter's |
---|
3759 | * evalFlags structure. See the reference documentation for |
---|
3760 | * more details. |
---|
3761 | * |
---|
3762 | *---------------------------------------------------------------------- |
---|
3763 | */ |
---|
3764 | |
---|
3765 | void |
---|
3766 | Tcl_AllowExceptions(interp) |
---|
3767 | Tcl_Interp *interp; /* Interpreter in which to set flag. */ |
---|
3768 | { |
---|
3769 | Interp *iPtr = (Interp *) interp; |
---|
3770 | |
---|
3771 | iPtr->evalFlags |= TCL_ALLOW_EXCEPTIONS; |
---|
3772 | } |
---|
3773 | |
---|