1 | /* |
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2 | * tclCompile.h -- |
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3 | * |
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4 | * Copyright (c) 1996-1997 Sun Microsystems, Inc. |
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5 | * |
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6 | * See the file "license.terms" for information on usage and redistribution |
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7 | * of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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8 | * |
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9 | * RCS: @(#) $Id: tclCompile.h,v 1.1 2008-06-04 13:58:05 demin Exp $ |
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10 | */ |
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11 | |
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12 | #ifndef _TCLCOMPILATION |
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13 | #define _TCLCOMPILATION 1 |
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14 | |
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15 | #ifndef _TCLINT |
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16 | #include "tclInt.h" |
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17 | #endif /* _TCLINT */ |
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18 | |
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19 | #ifdef BUILD_tcl |
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20 | # undef TCL_STORAGE_CLASS |
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21 | # define TCL_STORAGE_CLASS DLLEXPORT |
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22 | #endif |
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23 | |
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24 | /* |
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25 | *------------------------------------------------------------------------ |
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26 | * Variables related to compilation. These are used in tclCompile.c, |
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27 | * tclExecute.c, tclBasic.c, and their clients. |
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28 | *------------------------------------------------------------------------ |
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29 | */ |
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30 | |
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31 | /* |
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32 | * Variable that denotes the command name Tcl object type. Objects of this |
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33 | * type cache the Command pointer that results from looking up command names |
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34 | * in the command hashtable. |
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35 | */ |
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36 | |
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37 | extern Tcl_ObjType tclCmdNameType; |
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38 | |
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39 | /* |
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40 | * Variable that controls whether compilation tracing is enabled and, if so, |
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41 | * what level of tracing is desired: |
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42 | * 0: no compilation tracing |
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43 | * 1: summarize compilation of top level cmds and proc bodies |
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44 | * 2: display all instructions of each ByteCode compiled |
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45 | * This variable is linked to the Tcl variable "tcl_traceCompile". |
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46 | */ |
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47 | |
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48 | extern int tclTraceCompile; |
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49 | |
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50 | /* |
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51 | * Variable that controls whether execution tracing is enabled and, if so, |
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52 | * what level of tracing is desired: |
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53 | * 0: no execution tracing |
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54 | * 1: trace invocations of Tcl procs only |
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55 | * 2: trace invocations of all (not compiled away) commands |
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56 | * 3: display each instruction executed |
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57 | * This variable is linked to the Tcl variable "tcl_traceExec". |
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58 | */ |
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59 | |
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60 | extern int tclTraceExec; |
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61 | |
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62 | /* |
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63 | * The number of bytecode compilations and various other compilation-related |
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64 | * statistics. The tclByteCodeCount and tclSourceCount arrays are used to |
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65 | * hold the count of ByteCodes and sources whose sizes fall into various |
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66 | * binary decades; e.g., tclByteCodeCount[5] is a count of the ByteCodes |
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67 | * with size larger than 2**4 and less than or equal to 2**5. |
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68 | */ |
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69 | |
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70 | #ifdef TCL_COMPILE_STATS |
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71 | extern long tclNumCompilations; |
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72 | extern double tclTotalSourceBytes; |
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73 | extern double tclTotalCodeBytes; |
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74 | |
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75 | extern double tclTotalInstBytes; |
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76 | extern double tclTotalObjBytes; |
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77 | extern double tclTotalExceptBytes; |
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78 | extern double tclTotalAuxBytes; |
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79 | extern double tclTotalCmdMapBytes; |
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80 | |
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81 | extern double tclCurrentSourceBytes; |
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82 | extern double tclCurrentCodeBytes; |
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83 | |
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84 | extern int tclSourceCount[32]; |
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85 | extern int tclByteCodeCount[32]; |
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86 | #endif /* TCL_COMPILE_STATS */ |
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87 | |
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88 | /* |
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89 | *------------------------------------------------------------------------ |
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90 | * Data structures related to compilation. |
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91 | *------------------------------------------------------------------------ |
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92 | */ |
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93 | |
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94 | /* |
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95 | * The structure used to implement Tcl "exceptions" (exceptional returns): |
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96 | * for example, those generated in loops by the break and continue commands, |
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97 | * and those generated by scripts and caught by the catch command. This |
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98 | * ExceptionRange structure describes a range of code (e.g., a loop body), |
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99 | * the kind of exceptions (e.g., a break or continue) that might occur, and |
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100 | * the PC offsets to jump to if a matching exception does occur. Exception |
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101 | * ranges can nest so this structure includes a nesting level that is used |
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102 | * at runtime to find the closest exception range surrounding a PC. For |
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103 | * example, when a break command is executed, the ExceptionRange structure |
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104 | * for the most deeply nested loop, if any, is found and used. These |
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105 | * structures are also generated for the "next" subcommands of for loops |
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106 | * since a break there terminates the for command. This means a for command |
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107 | * actually generates two LoopInfo structures. |
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108 | */ |
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109 | |
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110 | typedef enum { |
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111 | LOOP_EXCEPTION_RANGE, /* Code range is part of a loop command. |
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112 | * break and continue "exceptions" cause |
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113 | * jumps to appropriate PC offsets. */ |
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114 | CATCH_EXCEPTION_RANGE /* Code range is controlled by a catch |
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115 | * command. Errors in the range cause a |
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116 | * jump to a particular PC offset. */ |
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117 | } ExceptionRangeType; |
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118 | |
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119 | typedef struct ExceptionRange { |
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120 | ExceptionRangeType type; /* The kind of ExceptionRange. */ |
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121 | int nestingLevel; /* Static depth of the exception range. |
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122 | * Used to find the most deeply-nested |
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123 | * range surrounding a PC at runtime. */ |
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124 | int codeOffset; /* Offset of the first instruction byte of |
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125 | * the code range. */ |
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126 | int numCodeBytes; /* Number of bytes in the code range. */ |
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127 | int breakOffset; /* If a LOOP_EXCEPTION_RANGE, the target |
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128 | * PC offset for a break command in the |
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129 | * range. */ |
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130 | int continueOffset; /* If a LOOP_EXCEPTION_RANGE and not -1, |
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131 | * the target PC offset for a continue |
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132 | * command in the code range. Otherwise, |
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133 | * ignore this range when processing a |
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134 | * continue command. */ |
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135 | int catchOffset; /* If a CATCH_EXCEPTION_RANGE, the target PC |
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136 | * offset for an "exception" in range. */ |
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137 | } ExceptionRange; |
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138 | |
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139 | /* |
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140 | * Structure used to map between instruction pc and source locations. It |
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141 | * defines for each compiled Tcl command its code's starting offset and |
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142 | * its source's starting offset and length. Note that the code offset |
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143 | * increases monotonically: that is, the table is sorted in code offset |
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144 | * order. The source offset is not monotonic. |
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145 | */ |
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146 | |
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147 | typedef struct CmdLocation { |
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148 | int codeOffset; /* Offset of first byte of command code. */ |
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149 | int numCodeBytes; /* Number of bytes for command's code. */ |
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150 | int srcOffset; /* Offset of first char of the command. */ |
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151 | int numSrcChars; /* Number of command source chars. */ |
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152 | } CmdLocation; |
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153 | |
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154 | /* |
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155 | * CompileProcs need the ability to record information during compilation |
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156 | * that can be used by bytecode instructions during execution. The AuxData |
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157 | * structure provides this "auxiliary data" mechanism. An arbitrary number |
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158 | * of these structures can be stored in the ByteCode record (during |
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159 | * compilation they are stored in a CompileEnv structure). Each AuxData |
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160 | * record holds one word of client-specified data (often a pointer) and is |
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161 | * given an index that instructions can later use to look up the structure |
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162 | * and its data. |
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163 | * |
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164 | * The following definitions declare the types of procedures that are called |
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165 | * to duplicate or free this auxiliary data when the containing ByteCode |
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166 | * objects are duplicated and freed. Pointers to these procedures are kept |
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167 | * in the AuxData structure. |
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168 | */ |
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169 | |
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170 | typedef ClientData (AuxDataDupProc) _ANSI_ARGS_((ClientData clientData)); |
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171 | typedef void (AuxDataFreeProc) _ANSI_ARGS_((ClientData clientData)); |
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172 | |
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173 | /* |
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174 | * We define a separate AuxDataType struct to hold type-related information |
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175 | * for the AuxData structure. This separation makes it possible for clients |
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176 | * outside of the TCL core to manipulate (in a limited fashion!) AuxData; |
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177 | * for example, it makes it possible to pickle and unpickle AuxData structs. |
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178 | */ |
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179 | |
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180 | typedef struct AuxDataType { |
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181 | char *name; /* the name of the type. Types can be |
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182 | * registered and found by name */ |
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183 | AuxDataDupProc *dupProc; /* Callback procedure to invoke when the |
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184 | * aux data is duplicated (e.g., when the |
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185 | * ByteCode structure containing the aux |
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186 | * data is duplicated). NULL means just |
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187 | * copy the source clientData bits; no |
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188 | * proc need be called. */ |
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189 | AuxDataFreeProc *freeProc; /* Callback procedure to invoke when the |
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190 | * aux data is freed. NULL means no |
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191 | * proc need be called. */ |
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192 | } AuxDataType; |
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193 | |
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194 | /* |
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195 | * The definition of the AuxData structure that holds information created |
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196 | * during compilation by CompileProcs and used by instructions during |
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197 | * execution. |
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198 | */ |
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199 | |
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200 | typedef struct AuxData { |
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201 | AuxDataType *type; /* pointer to the AuxData type associated with |
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202 | * this ClientData. */ |
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203 | ClientData clientData; /* The compilation data itself. */ |
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204 | } AuxData; |
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205 | |
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206 | /* |
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207 | * Structure defining the compilation environment. After compilation, fields |
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208 | * describing bytecode instructions are copied out into the more compact |
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209 | * ByteCode structure defined below. |
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210 | */ |
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211 | |
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212 | #define COMPILEENV_INIT_CODE_BYTES 250 |
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213 | #define COMPILEENV_INIT_NUM_OBJECTS 40 |
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214 | #define COMPILEENV_INIT_EXCEPT_RANGES 5 |
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215 | #define COMPILEENV_INIT_CMD_MAP_SIZE 40 |
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216 | #define COMPILEENV_INIT_AUX_DATA_SIZE 5 |
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217 | |
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218 | typedef struct CompileEnv { |
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219 | Interp *iPtr; /* Interpreter containing the code being |
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220 | * compiled. Commands and their compile |
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221 | * procs are specific to an interpreter so |
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222 | * the code emitted will depend on the |
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223 | * interpreter. */ |
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224 | char *source; /* The source string being compiled by |
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225 | * SetByteCodeFromAny. This pointer is not |
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226 | * owned by the CompileEnv and must not be |
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227 | * freed or changed by it. */ |
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228 | Proc *procPtr; /* If a procedure is being compiled, a |
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229 | * pointer to its Proc structure; otherwise |
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230 | * NULL. Used to compile local variables. |
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231 | * Set from information provided by |
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232 | * ObjInterpProc in tclProc.c. */ |
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233 | int numCommands; /* Number of commands compiled. */ |
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234 | int excRangeDepth; /* Current exception range nesting level; |
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235 | * -1 if not in any range currently. */ |
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236 | int maxExcRangeDepth; /* Max nesting level of exception ranges; |
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237 | * -1 if no ranges have been compiled. */ |
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238 | int maxStackDepth; /* Maximum number of stack elements needed |
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239 | * to execute the code. Set by compilation |
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240 | * procedures before returning. */ |
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241 | Tcl_HashTable objTable; /* Contains all Tcl objects referenced by |
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242 | * the compiled code. Indexed by the string |
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243 | * representations of the objects. Used to |
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244 | * avoid creating duplicate objects. */ |
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245 | int pushSimpleWords; /* Set 1 by callers of compilation routines |
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246 | * if they should emit instructions to push |
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247 | * "simple" command words (those that are |
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248 | * just a sequence of characters). If 0, the |
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249 | * callers are responsible for compiling |
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250 | * simple words. */ |
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251 | int wordIsSimple; /* Set 1 by compilation procedures before |
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252 | * returning if the previous command word |
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253 | * was just a sequence of characters, |
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254 | * otherwise 0. Used to help determine the |
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255 | * command being compiled. */ |
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256 | int numSimpleWordChars; /* If wordIsSimple is 1 then the number of |
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257 | * characters in the simple word, else 0. */ |
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258 | int exprIsJustVarRef; /* Set 1 if the expression last compiled by |
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259 | * TclCompileExpr consisted of just a |
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260 | * variable reference as in the expression |
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261 | * of "if $b then...". Otherwise 0. Used |
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262 | * to implement expr's 2 level substitution |
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263 | * semantics properly. */ |
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264 | int exprIsComparison; /* Set 1 if the top-level operator in the |
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265 | * expression last compiled is a comparison. |
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266 | * Otherwise 0. If 1, since the operands |
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267 | * might be strings, the expr is compiled |
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268 | * out-of-line to implement expr's 2 level |
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269 | * substitution semantics properly. */ |
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270 | int termOffset; /* Offset of character just after the last |
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271 | * one compiled. Set by compilation |
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272 | * procedures before returning. */ |
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273 | unsigned char *codeStart; /* Points to the first byte of the code. */ |
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274 | unsigned char *codeNext; /* Points to next code array byte to use. */ |
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275 | unsigned char *codeEnd; /* Points just after the last allocated |
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276 | * code array byte. */ |
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277 | int mallocedCodeArray; /* Set 1 if code array was expanded |
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278 | * and codeStart points into the heap.*/ |
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279 | Tcl_Obj **objArrayPtr; /* Points to start of object array. */ |
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280 | int objArrayNext; /* Index of next free object array entry. */ |
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281 | int objArrayEnd; /* Index just after last obj array entry. */ |
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282 | int mallocedObjArray; /* 1 if object array was expanded and |
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283 | * objArray points into the heap, else 0. */ |
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284 | ExceptionRange *excRangeArrayPtr; |
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285 | /* Points to start of the ExceptionRange |
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286 | * array. */ |
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287 | int excRangeArrayNext; /* Next free ExceptionRange array index. |
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288 | * excRangeArrayNext is the number of ranges |
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289 | * and (excRangeArrayNext-1) is the index of |
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290 | * the current range's array entry. */ |
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291 | int excRangeArrayEnd; /* Index after the last ExceptionRange |
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292 | * array entry. */ |
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293 | int mallocedExcRangeArray; /* 1 if ExceptionRange array was expanded |
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294 | * and excRangeArrayPtr points in heap, |
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295 | * else 0. */ |
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296 | CmdLocation *cmdMapPtr; /* Points to start of CmdLocation array. |
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297 | * numCommands is the index of the next |
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298 | * entry to use; (numCommands-1) is the |
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299 | * entry index for the last command. */ |
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300 | int cmdMapEnd; /* Index after last CmdLocation entry. */ |
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301 | int mallocedCmdMap; /* 1 if command map array was expanded and |
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302 | * cmdMapPtr points in the heap, else 0. */ |
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303 | AuxData *auxDataArrayPtr; /* Points to auxiliary data array start. */ |
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304 | int auxDataArrayNext; /* Next free compile aux data array index. |
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305 | * auxDataArrayNext is the number of aux |
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306 | * data items and (auxDataArrayNext-1) is |
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307 | * index of current aux data array entry. */ |
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308 | int auxDataArrayEnd; /* Index after last aux data array entry. */ |
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309 | int mallocedAuxDataArray; /* 1 if aux data array was expanded and |
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310 | * auxDataArrayPtr points in heap else 0. */ |
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311 | unsigned char staticCodeSpace[COMPILEENV_INIT_CODE_BYTES]; |
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312 | /* Initial storage for code. */ |
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313 | Tcl_Obj *staticObjArraySpace[COMPILEENV_INIT_NUM_OBJECTS]; |
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314 | /* Initial storage for object array. */ |
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315 | ExceptionRange staticExcRangeArraySpace[COMPILEENV_INIT_EXCEPT_RANGES]; |
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316 | /* Initial ExceptionRange array storage. */ |
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317 | CmdLocation staticCmdMapSpace[COMPILEENV_INIT_CMD_MAP_SIZE]; |
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318 | /* Initial storage for cmd location map. */ |
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319 | AuxData staticAuxDataArraySpace[COMPILEENV_INIT_AUX_DATA_SIZE]; |
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320 | /* Initial storage for aux data array. */ |
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321 | } CompileEnv; |
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322 | |
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323 | /* |
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324 | * The structure defining the bytecode instructions resulting from compiling |
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325 | * a Tcl script. Note that this structure is variable length: a single heap |
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326 | * object is allocated to hold the ByteCode structure immediately followed |
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327 | * by the code bytes, the object array, the ExceptionRange array, the |
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328 | * CmdLocation map, and the compilation AuxData array. |
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329 | */ |
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330 | |
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331 | /* |
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332 | * A PRECOMPILED bytecode struct is one that was generated from a compiled |
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333 | * image rather than implicitly compiled from source |
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334 | */ |
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335 | #define TCL_BYTECODE_PRECOMPILED 0x0001 |
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336 | |
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337 | typedef struct ByteCode { |
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338 | Interp *iPtr; /* Interpreter containing the code being |
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339 | * compiled. Commands and their compile |
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340 | * procs are specific to an interpreter so |
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341 | * the code emitted will depend on the |
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342 | * interpreter. */ |
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343 | int compileEpoch; /* Value of iPtr->compileEpoch when this |
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344 | * ByteCode was compiled. Used to invalidate |
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345 | * code when, e.g., commands with compile |
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346 | * procs are redefined. */ |
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347 | Namespace *nsPtr; /* Namespace context in which this code |
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348 | * was compiled. If the code is executed |
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349 | * if a different namespace, it must be |
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350 | * recompiled. */ |
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351 | int nsEpoch; /* Value of nsPtr->resolverEpoch when this |
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352 | * ByteCode was compiled. Used to invalidate |
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353 | * code when new namespace resolution rules |
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354 | * are put into effect. */ |
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355 | int refCount; /* Reference count: set 1 when created |
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356 | * plus 1 for each execution of the code |
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357 | * currently active. This structure can be |
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358 | * freed when refCount becomes zero. */ |
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359 | unsigned int flags; /* flags describing state for the codebyte. |
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360 | * this variable holds ORed values from the |
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361 | * TCL_BYTECODE_ masks defined above */ |
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362 | char *source; /* The source string from which this |
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363 | * ByteCode was compiled. Note that this |
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364 | * pointer is not owned by the ByteCode and |
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365 | * must not be freed or modified by it. */ |
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366 | Proc *procPtr; /* If the ByteCode was compiled from a |
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367 | * procedure body, this is a pointer to its |
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368 | * Proc structure; otherwise NULL. This |
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369 | * pointer is also not owned by the ByteCode |
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370 | * and must not be freed by it. Used for |
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371 | * debugging. */ |
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372 | size_t totalSize; /* Total number of bytes required for this |
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373 | * ByteCode structure including the storage |
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374 | * for Tcl objects in its object array. */ |
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375 | int numCommands; /* Number of commands compiled. */ |
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376 | int numSrcChars; /* Number of source chars compiled. */ |
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377 | int numCodeBytes; /* Number of code bytes. */ |
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378 | int numObjects; /* Number of Tcl objects in object array. */ |
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379 | int numExcRanges; /* Number of ExceptionRange array elems. */ |
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380 | int numAuxDataItems; /* Number of AuxData items. */ |
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381 | int numCmdLocBytes; /* Number of bytes needed for encoded |
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382 | * command location information. */ |
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383 | int maxExcRangeDepth; /* Maximum nesting level of ExceptionRanges; |
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384 | * -1 if no ranges were compiled. */ |
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385 | int maxStackDepth; /* Maximum number of stack elements needed |
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386 | * to execute the code. */ |
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387 | unsigned char *codeStart; /* Points to the first byte of the code. |
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388 | * This is just after the final ByteCode |
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389 | * member cmdMapPtr. */ |
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390 | Tcl_Obj **objArrayPtr; /* Points to the start of the object array. |
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391 | * This is just after the last code byte. */ |
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392 | ExceptionRange *excRangeArrayPtr; |
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393 | /* Points to the start of the ExceptionRange |
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394 | * array. This is just after the last |
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395 | * object in the object array. */ |
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396 | AuxData *auxDataArrayPtr; /* Points to the start of the auxiliary data |
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397 | * array. This is just after the last entry |
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398 | * in the ExceptionRange array. */ |
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399 | unsigned char *codeDeltaStart; |
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400 | /* Points to the first of a sequence of |
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401 | * bytes that encode the change in the |
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402 | * starting offset of each command's code. |
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403 | * If -127<=delta<=127, it is encoded as 1 |
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404 | * byte, otherwise 0xFF (128) appears and |
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405 | * the delta is encoded by the next 4 bytes. |
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406 | * Code deltas are always positive. This |
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407 | * sequence is just after the last entry in |
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408 | * the AuxData array. */ |
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409 | unsigned char *codeLengthStart; |
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410 | /* Points to the first of a sequence of |
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411 | * bytes that encode the length of each |
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412 | * command's code. The encoding is the same |
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413 | * as for code deltas. Code lengths are |
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414 | * always positive. This sequence is just |
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415 | * after the last entry in the code delta |
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416 | * sequence. */ |
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417 | unsigned char *srcDeltaStart; |
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418 | /* Points to the first of a sequence of |
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419 | * bytes that encode the change in the |
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420 | * starting offset of each command's source. |
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421 | * The encoding is the same as for code |
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422 | * deltas. Source deltas can be negative. |
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423 | * This sequence is just after the last byte |
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424 | * in the code length sequence. */ |
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425 | unsigned char *srcLengthStart; |
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426 | /* Points to the first of a sequence of |
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427 | * bytes that encode the length of each |
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428 | * command's source. The encoding is the |
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429 | * same as for code deltas. Source lengths |
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430 | * are always positive. This sequence is |
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431 | * just after the last byte in the source |
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432 | * delta sequence. */ |
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433 | } ByteCode; |
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434 | |
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435 | /* |
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436 | * Opcodes for the Tcl bytecode instructions. These opcodes must correspond |
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437 | * to the entries in the table of instruction descriptions in tclCompile.c. |
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438 | * Also, the order and number of the expression opcodes (e.g., INST_LOR) |
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439 | * must match the entries in the array operatorStrings in tclExecute.c. |
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440 | */ |
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441 | |
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442 | /* Opcodes 0 to 9 */ |
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443 | #define INST_DONE 0 |
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444 | #define INST_PUSH1 (INST_DONE + 1) |
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445 | #define INST_PUSH4 (INST_DONE + 2) |
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446 | #define INST_POP (INST_DONE + 3) |
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447 | #define INST_DUP (INST_DONE + 4) |
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448 | #define INST_CONCAT1 (INST_DONE + 5) |
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449 | #define INST_INVOKE_STK1 (INST_DONE + 6) |
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450 | #define INST_INVOKE_STK4 (INST_DONE + 7) |
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451 | #define INST_EVAL_STK (INST_DONE + 8) |
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452 | #define INST_EXPR_STK (INST_DONE + 9) |
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453 | |
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454 | /* Opcodes 10 to 23 */ |
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455 | #define INST_LOAD_SCALAR1 (INST_EXPR_STK + 1) |
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456 | #define INST_LOAD_SCALAR4 (INST_LOAD_SCALAR1 + 1) |
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457 | #define INST_LOAD_SCALAR_STK (INST_LOAD_SCALAR1 + 2) |
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458 | #define INST_LOAD_ARRAY1 (INST_LOAD_SCALAR1 + 3) |
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459 | #define INST_LOAD_ARRAY4 (INST_LOAD_SCALAR1 + 4) |
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460 | #define INST_LOAD_ARRAY_STK (INST_LOAD_SCALAR1 + 5) |
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461 | #define INST_LOAD_STK (INST_LOAD_SCALAR1 + 6) |
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462 | #define INST_STORE_SCALAR1 (INST_LOAD_SCALAR1 + 7) |
---|
463 | #define INST_STORE_SCALAR4 (INST_LOAD_SCALAR1 + 8) |
---|
464 | #define INST_STORE_SCALAR_STK (INST_LOAD_SCALAR1 + 9) |
---|
465 | #define INST_STORE_ARRAY1 (INST_LOAD_SCALAR1 + 10) |
---|
466 | #define INST_STORE_ARRAY4 (INST_LOAD_SCALAR1 + 11) |
---|
467 | #define INST_STORE_ARRAY_STK (INST_LOAD_SCALAR1 + 12) |
---|
468 | #define INST_STORE_STK (INST_LOAD_SCALAR1 + 13) |
---|
469 | |
---|
470 | /* Opcodes 24 to 33 */ |
---|
471 | #define INST_INCR_SCALAR1 (INST_STORE_STK + 1) |
---|
472 | #define INST_INCR_SCALAR_STK (INST_INCR_SCALAR1 + 1) |
---|
473 | #define INST_INCR_ARRAY1 (INST_INCR_SCALAR1 + 2) |
---|
474 | #define INST_INCR_ARRAY_STK (INST_INCR_SCALAR1 + 3) |
---|
475 | #define INST_INCR_STK (INST_INCR_SCALAR1 + 4) |
---|
476 | #define INST_INCR_SCALAR1_IMM (INST_INCR_SCALAR1 + 5) |
---|
477 | #define INST_INCR_SCALAR_STK_IMM (INST_INCR_SCALAR1 + 6) |
---|
478 | #define INST_INCR_ARRAY1_IMM (INST_INCR_SCALAR1 + 7) |
---|
479 | #define INST_INCR_ARRAY_STK_IMM (INST_INCR_SCALAR1 + 8) |
---|
480 | #define INST_INCR_STK_IMM (INST_INCR_SCALAR1 + 9) |
---|
481 | |
---|
482 | /* Opcodes 34 to 39 */ |
---|
483 | #define INST_JUMP1 (INST_INCR_STK_IMM + 1) |
---|
484 | #define INST_JUMP4 (INST_JUMP1 + 1) |
---|
485 | #define INST_JUMP_TRUE1 (INST_JUMP1 + 2) |
---|
486 | #define INST_JUMP_TRUE4 (INST_JUMP1 + 3) |
---|
487 | #define INST_JUMP_FALSE1 (INST_JUMP1 + 4) |
---|
488 | #define INST_JUMP_FALSE4 (INST_JUMP1 + 5) |
---|
489 | |
---|
490 | /* Opcodes 40 to 64 */ |
---|
491 | #define INST_LOR (INST_JUMP_FALSE4 + 1) |
---|
492 | #define INST_LAND (INST_LOR + 1) |
---|
493 | #define INST_BITOR (INST_LOR + 2) |
---|
494 | #define INST_BITXOR (INST_LOR + 3) |
---|
495 | #define INST_BITAND (INST_LOR + 4) |
---|
496 | #define INST_EQ (INST_LOR + 5) |
---|
497 | #define INST_NEQ (INST_LOR + 6) |
---|
498 | #define INST_LT (INST_LOR + 7) |
---|
499 | #define INST_GT (INST_LOR + 8) |
---|
500 | #define INST_LE (INST_LOR + 9) |
---|
501 | #define INST_GE (INST_LOR + 10) |
---|
502 | #define INST_LSHIFT (INST_LOR + 11) |
---|
503 | #define INST_RSHIFT (INST_LOR + 12) |
---|
504 | #define INST_ADD (INST_LOR + 13) |
---|
505 | #define INST_SUB (INST_LOR + 14) |
---|
506 | #define INST_MULT (INST_LOR + 15) |
---|
507 | #define INST_DIV (INST_LOR + 16) |
---|
508 | #define INST_MOD (INST_LOR + 17) |
---|
509 | #define INST_UPLUS (INST_LOR + 18) |
---|
510 | #define INST_UMINUS (INST_LOR + 19) |
---|
511 | #define INST_BITNOT (INST_LOR + 20) |
---|
512 | #define INST_LNOT (INST_LOR + 21) |
---|
513 | #define INST_CALL_BUILTIN_FUNC1 (INST_LOR + 22) |
---|
514 | #define INST_CALL_FUNC1 (INST_LOR + 23) |
---|
515 | #define INST_TRY_CVT_TO_NUMERIC (INST_LOR + 24) |
---|
516 | |
---|
517 | /* Opcodes 65 to 66 */ |
---|
518 | #define INST_BREAK (INST_TRY_CVT_TO_NUMERIC + 1) |
---|
519 | #define INST_CONTINUE (INST_BREAK + 1) |
---|
520 | |
---|
521 | /* Opcodes 67 to 68 */ |
---|
522 | #define INST_FOREACH_START4 (INST_CONTINUE + 1) |
---|
523 | #define INST_FOREACH_STEP4 (INST_FOREACH_START4 + 1) |
---|
524 | |
---|
525 | /* Opcodes 69 to 72 */ |
---|
526 | #define INST_BEGIN_CATCH4 (INST_FOREACH_STEP4 + 1) |
---|
527 | #define INST_END_CATCH (INST_BEGIN_CATCH4 + 1) |
---|
528 | #define INST_PUSH_RESULT (INST_BEGIN_CATCH4 + 2) |
---|
529 | #define INST_PUSH_RETURN_CODE (INST_BEGIN_CATCH4 + 3) |
---|
530 | |
---|
531 | /* The last opcode */ |
---|
532 | #define LAST_INST_OPCODE INST_PUSH_RETURN_CODE |
---|
533 | |
---|
534 | /* |
---|
535 | * Table describing the Tcl bytecode instructions: their name (for |
---|
536 | * displaying code), total number of code bytes required (including |
---|
537 | * operand bytes), and a description of the type of each operand. |
---|
538 | * These operand types include signed and unsigned integers of length |
---|
539 | * one and four bytes. The unsigned integers are used for indexes or |
---|
540 | * for, e.g., the count of objects to push in a "push" instruction. |
---|
541 | */ |
---|
542 | |
---|
543 | #define MAX_INSTRUCTION_OPERANDS 2 |
---|
544 | |
---|
545 | typedef enum InstOperandType { |
---|
546 | OPERAND_NONE, |
---|
547 | OPERAND_INT1, /* One byte signed integer. */ |
---|
548 | OPERAND_INT4, /* Four byte signed integer. */ |
---|
549 | OPERAND_UINT1, /* One byte unsigned integer. */ |
---|
550 | OPERAND_UINT4 /* Four byte unsigned integer. */ |
---|
551 | } InstOperandType; |
---|
552 | |
---|
553 | typedef struct InstructionDesc { |
---|
554 | char *name; /* Name of instruction. */ |
---|
555 | int numBytes; /* Total number of bytes for instruction. */ |
---|
556 | int numOperands; /* Number of operands. */ |
---|
557 | InstOperandType opTypes[MAX_INSTRUCTION_OPERANDS]; |
---|
558 | /* The type of each operand. */ |
---|
559 | } InstructionDesc; |
---|
560 | |
---|
561 | extern InstructionDesc instructionTable[]; |
---|
562 | |
---|
563 | /* |
---|
564 | * Definitions of the values of the INST_CALL_BUILTIN_FUNC instruction's |
---|
565 | * operand byte. Each value denotes a builtin Tcl math function. These |
---|
566 | * values must correspond to the entries in the builtinFuncTable array |
---|
567 | * below and to the values stored in the tclInt.h MathFunc structure's |
---|
568 | * builtinFuncIndex field. |
---|
569 | */ |
---|
570 | |
---|
571 | #define BUILTIN_FUNC_ACOS 0 |
---|
572 | #define BUILTIN_FUNC_ASIN 1 |
---|
573 | #define BUILTIN_FUNC_ATAN 2 |
---|
574 | #define BUILTIN_FUNC_ATAN2 3 |
---|
575 | #define BUILTIN_FUNC_CEIL 4 |
---|
576 | #define BUILTIN_FUNC_COS 5 |
---|
577 | #define BUILTIN_FUNC_COSH 6 |
---|
578 | #define BUILTIN_FUNC_EXP 7 |
---|
579 | #define BUILTIN_FUNC_FLOOR 8 |
---|
580 | #define BUILTIN_FUNC_FMOD 9 |
---|
581 | #define BUILTIN_FUNC_HYPOT 10 |
---|
582 | #define BUILTIN_FUNC_LOG 11 |
---|
583 | #define BUILTIN_FUNC_LOG10 12 |
---|
584 | #define BUILTIN_FUNC_POW 13 |
---|
585 | #define BUILTIN_FUNC_SIN 14 |
---|
586 | #define BUILTIN_FUNC_SINH 15 |
---|
587 | #define BUILTIN_FUNC_SQRT 16 |
---|
588 | #define BUILTIN_FUNC_TAN 17 |
---|
589 | #define BUILTIN_FUNC_TANH 18 |
---|
590 | #define BUILTIN_FUNC_ABS 19 |
---|
591 | #define BUILTIN_FUNC_DOUBLE 20 |
---|
592 | #define BUILTIN_FUNC_INT 21 |
---|
593 | #define BUILTIN_FUNC_RAND 22 |
---|
594 | #define BUILTIN_FUNC_ROUND 23 |
---|
595 | #define BUILTIN_FUNC_SRAND 24 |
---|
596 | |
---|
597 | #define LAST_BUILTIN_FUNC BUILTIN_FUNC_SRAND |
---|
598 | |
---|
599 | /* |
---|
600 | * Table describing the built-in math functions. Entries in this table are |
---|
601 | * indexed by the values of the INST_CALL_BUILTIN_FUNC instruction's |
---|
602 | * operand byte. |
---|
603 | */ |
---|
604 | |
---|
605 | typedef int (CallBuiltinFuncProc) _ANSI_ARGS_((Tcl_Interp *interp, |
---|
606 | ExecEnv *eePtr, ClientData clientData)); |
---|
607 | |
---|
608 | typedef struct { |
---|
609 | char *name; /* Name of function. */ |
---|
610 | int numArgs; /* Number of arguments for function. */ |
---|
611 | Tcl_ValueType argTypes[MAX_MATH_ARGS]; |
---|
612 | /* Acceptable types for each argument. */ |
---|
613 | CallBuiltinFuncProc *proc; /* Procedure implementing this function. */ |
---|
614 | ClientData clientData; /* Additional argument to pass to the |
---|
615 | * function when invoking it. */ |
---|
616 | } BuiltinFunc; |
---|
617 | |
---|
618 | extern BuiltinFunc builtinFuncTable[]; |
---|
619 | |
---|
620 | /* |
---|
621 | * The structure used to hold information about the start and end of each |
---|
622 | * argument word in a command. |
---|
623 | */ |
---|
624 | |
---|
625 | #define ARGINFO_INIT_ENTRIES 5 |
---|
626 | |
---|
627 | typedef struct ArgInfo { |
---|
628 | int numArgs; /* Number of argument words in command. */ |
---|
629 | char **startArray; /* Array of pointers to the first character |
---|
630 | * of each argument word. */ |
---|
631 | char **endArray; /* Array of pointers to the last character |
---|
632 | * of each argument word. */ |
---|
633 | int allocArgs; /* Number of array entries currently |
---|
634 | * allocated. */ |
---|
635 | int mallocedArrays; /* 1 if the arrays were expanded and |
---|
636 | * wordStartArray/wordEndArray point into |
---|
637 | * the heap, else 0. */ |
---|
638 | char *staticStartSpace[ARGINFO_INIT_ENTRIES]; |
---|
639 | /* Initial storage for word start array. */ |
---|
640 | char *staticEndSpace[ARGINFO_INIT_ENTRIES]; |
---|
641 | /* Initial storage for word end array. */ |
---|
642 | } ArgInfo; |
---|
643 | |
---|
644 | /* |
---|
645 | * Compilation of some Tcl constructs such as if commands and the logical or |
---|
646 | * (||) and logical and (&&) operators in expressions requires the |
---|
647 | * generation of forward jumps. Since the PC target of these jumps isn't |
---|
648 | * known when the jumps are emitted, we record the offset of each jump in an |
---|
649 | * array of JumpFixup structures. There is one array for each sequence of |
---|
650 | * jumps to one target PC. When we learn the target PC, we update the jumps |
---|
651 | * with the correct distance. Also, if the distance is too great (> 127 |
---|
652 | * bytes), we replace the single-byte jump with a four byte jump |
---|
653 | * instruction, move the instructions after the jump down, and update the |
---|
654 | * code offsets for any commands between the jump and the target. |
---|
655 | */ |
---|
656 | |
---|
657 | typedef enum { |
---|
658 | TCL_UNCONDITIONAL_JUMP, |
---|
659 | TCL_TRUE_JUMP, |
---|
660 | TCL_FALSE_JUMP |
---|
661 | } TclJumpType; |
---|
662 | |
---|
663 | typedef struct JumpFixup { |
---|
664 | TclJumpType jumpType; /* Indicates the kind of jump. */ |
---|
665 | int codeOffset; /* Offset of the first byte of the one-byte |
---|
666 | * forward jump's code. */ |
---|
667 | int cmdIndex; /* Index of the first command after the one |
---|
668 | * for which the jump was emitted. Used to |
---|
669 | * update the code offsets for subsequent |
---|
670 | * commands if the two-byte jump at jumpPc |
---|
671 | * must be replaced with a five-byte one. */ |
---|
672 | int excRangeIndex; /* Index of the first range entry in the |
---|
673 | * ExceptionRange array after the current |
---|
674 | * one. This field is used to adjust the |
---|
675 | * code offsets in subsequent ExceptionRange |
---|
676 | * records when a jump is grown from 2 bytes |
---|
677 | * to 5 bytes. */ |
---|
678 | } JumpFixup; |
---|
679 | |
---|
680 | #define JUMPFIXUP_INIT_ENTRIES 10 |
---|
681 | |
---|
682 | typedef struct JumpFixupArray { |
---|
683 | JumpFixup *fixup; /* Points to start of jump fixup array. */ |
---|
684 | int next; /* Index of next free array entry. */ |
---|
685 | int end; /* Index of last usable entry in array. */ |
---|
686 | int mallocedArray; /* 1 if array was expanded and fixups points |
---|
687 | * into the heap, else 0. */ |
---|
688 | JumpFixup staticFixupSpace[JUMPFIXUP_INIT_ENTRIES]; |
---|
689 | /* Initial storage for jump fixup array. */ |
---|
690 | } JumpFixupArray; |
---|
691 | |
---|
692 | /* |
---|
693 | * The structure describing one variable list of a foreach command. Note |
---|
694 | * that only foreach commands inside procedure bodies are compiled inline so |
---|
695 | * a ForeachVarList structure always describes local variables. Furthermore, |
---|
696 | * only scalar variables are supported for inline-compiled foreach loops. |
---|
697 | */ |
---|
698 | |
---|
699 | typedef struct ForeachVarList { |
---|
700 | int numVars; /* The number of variables in the list. */ |
---|
701 | int varIndexes[1]; /* An array of the indexes ("slot numbers") |
---|
702 | * for each variable in the procedure's |
---|
703 | * array of local variables. Only scalar |
---|
704 | * variables are supported. The actual |
---|
705 | * size of this field will be large enough |
---|
706 | * to numVars indexes. THIS MUST BE THE |
---|
707 | * LAST FIELD IN THE STRUCTURE! */ |
---|
708 | } ForeachVarList; |
---|
709 | |
---|
710 | /* |
---|
711 | * Structure used to hold information about a foreach command that is needed |
---|
712 | * during program execution. These structures are stored in CompileEnv and |
---|
713 | * ByteCode structures as auxiliary data. |
---|
714 | */ |
---|
715 | |
---|
716 | typedef struct ForeachInfo { |
---|
717 | int numLists; /* The number of both the variable and value |
---|
718 | * lists of the foreach command. */ |
---|
719 | int firstListTmp; /* The slot number of the first temporary |
---|
720 | * variable holding the lists themselves. */ |
---|
721 | int loopIterNumTmp; /* The slot number of the temp var holding |
---|
722 | * the count of times the loop body has been |
---|
723 | * executed. This is used to determine which |
---|
724 | * list element to assign each loop var. */ |
---|
725 | ForeachVarList *varLists[1];/* An array of pointers to ForeachVarList |
---|
726 | * structures describing each var list. The |
---|
727 | * actual size of this field will be large |
---|
728 | * enough to numVars indexes. THIS MUST BE |
---|
729 | * THE LAST FIELD IN THE STRUCTURE! */ |
---|
730 | } ForeachInfo; |
---|
731 | |
---|
732 | /* |
---|
733 | * Structure containing a cached pointer to a command that is the result |
---|
734 | * of resolving the command's name in some namespace. It is the internal |
---|
735 | * representation for a cmdName object. It contains the pointer along |
---|
736 | * with some information that is used to check the pointer's validity. |
---|
737 | */ |
---|
738 | |
---|
739 | typedef struct ResolvedCmdName { |
---|
740 | Command *cmdPtr; /* A cached Command pointer. */ |
---|
741 | Namespace *refNsPtr; /* Points to the namespace containing the |
---|
742 | * reference (not the namespace that |
---|
743 | * contains the referenced command). */ |
---|
744 | long refNsId; /* refNsPtr's unique namespace id. Used to |
---|
745 | * verify that refNsPtr is still valid |
---|
746 | * (e.g., it's possible that the cmd's |
---|
747 | * containing namespace was deleted and a |
---|
748 | * new one created at the same address). */ |
---|
749 | int refNsCmdEpoch; /* Value of the referencing namespace's |
---|
750 | * cmdRefEpoch when the pointer was cached. |
---|
751 | * Before using the cached pointer, we check |
---|
752 | * if the namespace's epoch was incremented; |
---|
753 | * if so, this cached pointer is invalid. */ |
---|
754 | int cmdEpoch; /* Value of the command's cmdEpoch when this |
---|
755 | * pointer was cached. Before using the |
---|
756 | * cached pointer, we check if the cmd's |
---|
757 | * epoch was incremented; if so, the cmd was |
---|
758 | * renamed, deleted, hidden, or exposed, and |
---|
759 | * so the pointer is invalid. */ |
---|
760 | int refCount; /* Reference count: 1 for each cmdName |
---|
761 | * object that has a pointer to this |
---|
762 | * ResolvedCmdName structure as its internal |
---|
763 | * rep. This structure can be freed when |
---|
764 | * refCount becomes zero. */ |
---|
765 | } ResolvedCmdName; |
---|
766 | |
---|
767 | /* |
---|
768 | *---------------------------------------------------------------- |
---|
769 | * Procedures shared among Tcl bytecode compilation and execution |
---|
770 | * modules but not used outside: |
---|
771 | *---------------------------------------------------------------- |
---|
772 | */ |
---|
773 | |
---|
774 | EXTERN void TclCleanupByteCode _ANSI_ARGS_((ByteCode *codePtr)); |
---|
775 | EXTERN int TclCompileExpr _ANSI_ARGS_((Tcl_Interp *interp, |
---|
776 | char *string, char *lastChar, int flags, |
---|
777 | CompileEnv *envPtr)); |
---|
778 | EXTERN int TclCompileQuotes _ANSI_ARGS_((Tcl_Interp *interp, |
---|
779 | char *string, char *lastChar, int termChar, |
---|
780 | int flags, CompileEnv *envPtr)); |
---|
781 | EXTERN int TclCompileString _ANSI_ARGS_((Tcl_Interp *interp, |
---|
782 | char *string, char *lastChar, int flags, |
---|
783 | CompileEnv *envPtr)); |
---|
784 | EXTERN int TclCompileDollarVar _ANSI_ARGS_((Tcl_Interp *interp, |
---|
785 | char *string, char *lastChar, int flags, |
---|
786 | CompileEnv *envPtr)); |
---|
787 | EXTERN int TclCreateAuxData _ANSI_ARGS_((ClientData clientData, |
---|
788 | AuxDataType *typePtr, CompileEnv *envPtr)); |
---|
789 | EXTERN ExecEnv * TclCreateExecEnv _ANSI_ARGS_((Tcl_Interp *interp)); |
---|
790 | EXTERN void TclDeleteExecEnv _ANSI_ARGS_((ExecEnv *eePtr)); |
---|
791 | EXTERN void TclEmitForwardJump _ANSI_ARGS_((CompileEnv *envPtr, |
---|
792 | TclJumpType jumpType, JumpFixup *jumpFixupPtr)); |
---|
793 | EXTERN AuxDataType *TclGetAuxDataType _ANSI_ARGS_((char *typeName)); |
---|
794 | EXTERN ExceptionRange * TclGetExceptionRangeForPc _ANSI_ARGS_(( |
---|
795 | unsigned char *pc, int catchOnly, |
---|
796 | ByteCode* codePtr)); |
---|
797 | EXTERN InstructionDesc * TclGetInstructionTable _ANSI_ARGS_(()); |
---|
798 | EXTERN int TclExecuteByteCode _ANSI_ARGS_((Tcl_Interp *interp, |
---|
799 | ByteCode *codePtr)); |
---|
800 | EXTERN void TclExpandCodeArray _ANSI_ARGS_(( |
---|
801 | CompileEnv *envPtr)); |
---|
802 | EXTERN void TclExpandJumpFixupArray _ANSI_ARGS_(( |
---|
803 | JumpFixupArray *fixupArrayPtr)); |
---|
804 | EXTERN void TclFinalizeAuxDataTypeTable _ANSI_ARGS_((void)); |
---|
805 | EXTERN int TclFixupForwardJump _ANSI_ARGS_(( |
---|
806 | CompileEnv *envPtr, JumpFixup *jumpFixupPtr, |
---|
807 | int jumpDist, int distThreshold)); |
---|
808 | EXTERN void TclFreeCompileEnv _ANSI_ARGS_((CompileEnv *envPtr)); |
---|
809 | EXTERN void TclFreeJumpFixupArray _ANSI_ARGS_(( |
---|
810 | JumpFixupArray *fixupArrayPtr)); |
---|
811 | EXTERN void TclInitAuxDataTypeTable _ANSI_ARGS_((void)); |
---|
812 | EXTERN void TclInitByteCodeObj _ANSI_ARGS_((Tcl_Obj *objPtr, |
---|
813 | CompileEnv *envPtr)); |
---|
814 | EXTERN void TclInitCompileEnv _ANSI_ARGS_((Tcl_Interp *interp, |
---|
815 | CompileEnv *envPtr, char *string)); |
---|
816 | EXTERN void TclInitJumpFixupArray _ANSI_ARGS_(( |
---|
817 | JumpFixupArray *fixupArrayPtr)); |
---|
818 | #ifdef TCL_COMPILE_STATS |
---|
819 | EXTERN int TclLog2 _ANSI_ARGS_((int value)); |
---|
820 | #endif /*TCL_COMPILE_STATS*/ |
---|
821 | EXTERN int TclObjIndexForString _ANSI_ARGS_((char *start, |
---|
822 | int length, int allocStrRep, int inHeap, |
---|
823 | CompileEnv *envPtr)); |
---|
824 | EXTERN int TclPrintInstruction _ANSI_ARGS_((ByteCode* codePtr, |
---|
825 | unsigned char *pc)); |
---|
826 | EXTERN void TclPrintSource _ANSI_ARGS_((FILE *outFile, |
---|
827 | char *string, int maxChars)); |
---|
828 | EXTERN void TclRegisterAuxDataType _ANSI_ARGS_((AuxDataType *typePtr)); |
---|
829 | |
---|
830 | /* |
---|
831 | *---------------------------------------------------------------- |
---|
832 | * Macros used by Tcl bytecode compilation and execution modules |
---|
833 | * inside the Tcl core but not used outside. |
---|
834 | *---------------------------------------------------------------- |
---|
835 | */ |
---|
836 | |
---|
837 | /* |
---|
838 | * Macros to ensure there is enough room in a CompileEnv's code array. |
---|
839 | * The ANSI C "prototypes" for these macros are: |
---|
840 | * |
---|
841 | * EXTERN void TclEnsureCodeSpace1 _ANSI_ARGS_((CompileEnv *envPtr)); |
---|
842 | * EXTERN void TclEnsureCodeSpace _ANSI_ARGS_((int nBytes, |
---|
843 | * CompileEnv *envPtr)); |
---|
844 | */ |
---|
845 | |
---|
846 | #define TclEnsureCodeSpace1(envPtr) \ |
---|
847 | if ((envPtr)->codeNext == (envPtr)->codeEnd) \ |
---|
848 | TclExpandCodeArray(envPtr) |
---|
849 | |
---|
850 | #define TclEnsureCodeSpace(nBytes, envPtr) \ |
---|
851 | if (((envPtr)->codeNext + nBytes) > (envPtr)->codeEnd) \ |
---|
852 | TclExpandCodeArray(envPtr) |
---|
853 | |
---|
854 | /* |
---|
855 | * Macro to emit an opcode byte into a CompileEnv's code array. |
---|
856 | * The ANSI C "prototype" for this macro is: |
---|
857 | * |
---|
858 | * EXTERN void TclEmitOpcode _ANSI_ARGS_((unsigned char op, |
---|
859 | * CompileEnv *envPtr)); |
---|
860 | */ |
---|
861 | |
---|
862 | #define TclEmitOpcode(op, envPtr) \ |
---|
863 | TclEnsureCodeSpace1(envPtr); \ |
---|
864 | *(envPtr)->codeNext++ = (unsigned char) (op) |
---|
865 | |
---|
866 | /* |
---|
867 | * Macros to emit a (signed or unsigned) int operand. The two variants |
---|
868 | * depend on the number of bytes needed for the int. Four byte integers |
---|
869 | * are stored in "big-endian" order with the high order byte stored at |
---|
870 | * the lowest address. The ANSI C "prototypes" for these macros are: |
---|
871 | * |
---|
872 | * EXTERN void TclEmitInt1 _ANSI_ARGS_((int i, CompileEnv *envPtr)); |
---|
873 | * EXTERN void TclEmitInt4 _ANSI_ARGS_((int i, CompileEnv *envPtr)); |
---|
874 | */ |
---|
875 | |
---|
876 | #define TclEmitInt1(i, envPtr) \ |
---|
877 | TclEnsureCodeSpace(1, (envPtr)); \ |
---|
878 | *(envPtr)->codeNext++ = (unsigned char) ((unsigned int) (i)) |
---|
879 | |
---|
880 | #define TclEmitInt4(i, envPtr) \ |
---|
881 | TclEnsureCodeSpace(4, (envPtr)); \ |
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882 | *(envPtr)->codeNext++ = \ |
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883 | (unsigned char) ((unsigned int) (i) >> 24); \ |
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884 | *(envPtr)->codeNext++ = \ |
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885 | (unsigned char) ((unsigned int) (i) >> 16); \ |
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886 | *(envPtr)->codeNext++ = \ |
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887 | (unsigned char) ((unsigned int) (i) >> 8); \ |
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888 | *(envPtr)->codeNext++ = \ |
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889 | (unsigned char) ((unsigned int) (i) ) |
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890 | |
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891 | /* |
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892 | * Macros to emit an instruction with signed or unsigned int operands. |
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893 | * The ANSI C "prototypes" for these macros are: |
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894 | * |
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895 | * EXTERN void TclEmitInstInt1 _ANSI_ARGS_((unsigned char op, int i, |
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896 | * CompileEnv *envPtr)); |
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897 | * EXTERN void TclEmitInstInt4 _ANSI_ARGS_((unsigned char op, int i, |
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898 | * CompileEnv *envPtr)); |
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899 | * EXTERN void TclEmitInstUInt1 _ANSI_ARGS_((unsigned char op, |
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900 | * unsigned int i, CompileEnv *envPtr)); |
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901 | * EXTERN void TclEmitInstUInt4 _ANSI_ARGS_((unsigned char op, |
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902 | * unsigned int i, CompileEnv *envPtr)); |
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903 | */ |
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904 | |
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905 | #define TclEmitInstInt1(op, i, envPtr) \ |
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906 | TclEnsureCodeSpace(2, (envPtr)); \ |
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907 | *(envPtr)->codeNext++ = (unsigned char) (op); \ |
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908 | *(envPtr)->codeNext++ = (unsigned char) ((unsigned int) (i)) |
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909 | |
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910 | #define TclEmitInstInt4(op, i, envPtr) \ |
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911 | TclEnsureCodeSpace(5, (envPtr)); \ |
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912 | *(envPtr)->codeNext++ = (unsigned char) (op); \ |
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913 | *(envPtr)->codeNext++ = \ |
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914 | (unsigned char) ((unsigned int) (i) >> 24); \ |
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915 | *(envPtr)->codeNext++ = \ |
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916 | (unsigned char) ((unsigned int) (i) >> 16); \ |
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917 | *(envPtr)->codeNext++ = \ |
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918 | (unsigned char) ((unsigned int) (i) >> 8); \ |
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919 | *(envPtr)->codeNext++ = \ |
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920 | (unsigned char) ((unsigned int) (i) ) |
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921 | |
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922 | #define TclEmitInstUInt1(op, i, envPtr) \ |
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923 | TclEmitInstInt1((op), (i), (envPtr)) |
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924 | |
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925 | #define TclEmitInstUInt4(op, i, envPtr) \ |
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926 | TclEmitInstInt4((op), (i), (envPtr)) |
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927 | |
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928 | /* |
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929 | * Macro to push a Tcl object onto the Tcl evaluation stack. It emits the |
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930 | * object's one or four byte array index into the CompileEnv's code |
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931 | * array. These support, respectively, a maximum of 256 (2**8) and 2**32 |
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932 | * objects in a CompileEnv. The ANSI C "prototype" for this macro is: |
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933 | * |
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934 | * EXTERN void TclEmitPush _ANSI_ARGS_((int objIndex, CompileEnv *envPtr)); |
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935 | */ |
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936 | |
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937 | #define TclEmitPush(objIndex, envPtr) \ |
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938 | if ((objIndex) <= 255) { \ |
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939 | TclEmitInstUInt1(INST_PUSH1, (objIndex), (envPtr)); \ |
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940 | } else { \ |
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941 | TclEmitInstUInt4(INST_PUSH4, (objIndex), (envPtr)); \ |
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942 | } |
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943 | |
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944 | /* |
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945 | * Macros to update a (signed or unsigned) integer starting at a pointer. |
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946 | * The two variants depend on the number of bytes. The ANSI C "prototypes" |
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947 | * for these macros are: |
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948 | * |
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949 | * EXTERN void TclStoreInt1AtPtr _ANSI_ARGS_((int i, unsigned char *p)); |
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950 | * EXTERN void TclStoreInt4AtPtr _ANSI_ARGS_((int i, unsigned char *p)); |
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951 | */ |
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952 | |
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953 | #define TclStoreInt1AtPtr(i, p) \ |
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954 | *(p) = (unsigned char) ((unsigned int) (i)) |
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955 | |
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956 | #define TclStoreInt4AtPtr(i, p) \ |
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957 | *(p) = (unsigned char) ((unsigned int) (i) >> 24); \ |
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958 | *(p+1) = (unsigned char) ((unsigned int) (i) >> 16); \ |
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959 | *(p+2) = (unsigned char) ((unsigned int) (i) >> 8); \ |
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960 | *(p+3) = (unsigned char) ((unsigned int) (i) ) |
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961 | |
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962 | /* |
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963 | * Macros to update instructions at a particular pc with a new op code |
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964 | * and a (signed or unsigned) int operand. The ANSI C "prototypes" for |
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965 | * these macros are: |
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966 | * |
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967 | * EXTERN void TclUpdateInstInt1AtPc _ANSI_ARGS_((unsigned char op, int i, |
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968 | * unsigned char *pc)); |
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969 | * EXTERN void TclUpdateInstInt4AtPc _ANSI_ARGS_((unsigned char op, int i, |
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970 | * unsigned char *pc)); |
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971 | */ |
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972 | |
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973 | #define TclUpdateInstInt1AtPc(op, i, pc) \ |
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974 | *(pc) = (unsigned char) (op); \ |
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975 | TclStoreInt1AtPtr((i), ((pc)+1)) |
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976 | |
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977 | #define TclUpdateInstInt4AtPc(op, i, pc) \ |
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978 | *(pc) = (unsigned char) (op); \ |
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979 | TclStoreInt4AtPtr((i), ((pc)+1)) |
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980 | |
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981 | /* |
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982 | * Macros to get a signed integer (GET_INT{1,2}) or an unsigned int |
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983 | * (GET_UINT{1,2}) from a pointer. There are two variants for each |
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984 | * return type that depend on the number of bytes fetched. |
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985 | * The ANSI C "prototypes" for these macros are: |
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986 | * |
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987 | * EXTERN int TclGetInt1AtPtr _ANSI_ARGS_((unsigned char *p)); |
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988 | * EXTERN int TclGetInt4AtPtr _ANSI_ARGS_((unsigned char *p)); |
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989 | * EXTERN unsigned int TclGetUInt1AtPtr _ANSI_ARGS_((unsigned char *p)); |
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990 | * EXTERN unsigned int TclGetUInt4AtPtr _ANSI_ARGS_((unsigned char *p)); |
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991 | */ |
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992 | |
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993 | /* |
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994 | * The TclGetInt1AtPtr macro is tricky because we want to do sign |
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995 | * extension on the 1-byte value. Unfortunately the "char" type isn't |
---|
996 | * signed on all platforms so sign-extension doesn't always happen |
---|
997 | * automatically. Sometimes we can explicitly declare the pointer to be |
---|
998 | * signed, but other times we have to explicitly sign-extend the value |
---|
999 | * in software. |
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1000 | */ |
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1001 | |
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1002 | #ifndef __CHAR_UNSIGNED__ |
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1003 | # define TclGetInt1AtPtr(p) ((int) *((char *) p)) |
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1004 | #else |
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1005 | # ifdef HAVE_SIGNED_CHAR |
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1006 | # define TclGetInt1AtPtr(p) ((int) *((signed char *) p)) |
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1007 | # else |
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1008 | # define TclGetInt1AtPtr(p) (((int) *((char *) p)) \ |
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1009 | | ((*(p) & 0200) ? (-256) : 0)) |
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1010 | # endif |
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1011 | #endif |
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1012 | |
---|
1013 | #define TclGetInt4AtPtr(p) (((int) TclGetInt1AtPtr(p) << 24) | \ |
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1014 | (*((p)+1) << 16) | \ |
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1015 | (*((p)+2) << 8) | \ |
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1016 | (*((p)+3))) |
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1017 | |
---|
1018 | #define TclGetUInt1AtPtr(p) ((unsigned int) *(p)) |
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1019 | #define TclGetUInt4AtPtr(p) ((unsigned int) (*(p) << 24) | \ |
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1020 | (*((p)+1) << 16) | \ |
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1021 | (*((p)+2) << 8) | \ |
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1022 | (*((p)+3))) |
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1023 | |
---|
1024 | /* |
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1025 | * Macros used to compute the minimum and maximum of two integers. |
---|
1026 | * The ANSI C "prototypes" for these macros are: |
---|
1027 | * |
---|
1028 | * EXTERN int TclMin _ANSI_ARGS_((int i, int j)); |
---|
1029 | * EXTERN int TclMax _ANSI_ARGS_((int i, int j)); |
---|
1030 | */ |
---|
1031 | |
---|
1032 | #define TclMin(i, j) ((((int) i) < ((int) j))? (i) : (j)) |
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1033 | #define TclMax(i, j) ((((int) i) > ((int) j))? (i) : (j)) |
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1034 | |
---|
1035 | /* |
---|
1036 | * Macro used to compute the offset of the current instruction in the |
---|
1037 | * bytecode instruction stream. The ANSI C "prototypes" for this macro is: |
---|
1038 | * |
---|
1039 | * EXTERN int TclCurrCodeOffset _ANSI_ARGS_((void)); |
---|
1040 | */ |
---|
1041 | |
---|
1042 | #define TclCurrCodeOffset() ((envPtr)->codeNext - (envPtr)->codeStart) |
---|
1043 | |
---|
1044 | /* |
---|
1045 | * Upper bound for legal jump distances. Checked during compilation if |
---|
1046 | * debugging. |
---|
1047 | */ |
---|
1048 | |
---|
1049 | #define MAX_JUMP_DIST 5000 |
---|
1050 | |
---|
1051 | # undef TCL_STORAGE_CLASS |
---|
1052 | # define TCL_STORAGE_CLASS DLLIMPORT |
---|
1053 | |
---|
1054 | #endif /* _TCLCOMPILATION */ |
---|