1 | |
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2 | #ifdef WIN32 |
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3 | #include <direct.h> |
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4 | #define popen _popen |
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5 | #define pclose _pclose |
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6 | #endif |
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7 | |
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8 | #include "cmt_awk.h" |
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9 | #include "cmt_system.h" |
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10 | |
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11 | class Parser |
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12 | { |
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13 | public: |
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14 | Parser (Awk* awk, const cmt_string pattern, const cmt_regexp* expression) : |
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15 | m_pattern (pattern), m_expression (expression), m_awk(awk) |
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16 | { |
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17 | } |
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18 | |
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19 | /** |
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20 | * this first level parsing function extracts individual lines |
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21 | * from the text, taking care of both Unix and Windows EOL styles. |
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22 | * |
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23 | * Then the second level parsing function parse_line is called. |
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24 | */ |
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25 | Awk::condition parse (const cmt_string& text) |
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26 | { |
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27 | Awk::condition result = Awk::ok; |
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28 | |
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29 | cmt_string line; |
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30 | int pos; |
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31 | int max_pos; |
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32 | |
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33 | pos = 0; |
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34 | max_pos = text.size (); |
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35 | |
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36 | m_accumulator.erase (0); |
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37 | |
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38 | for (pos = 0; pos < max_pos;) |
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39 | { |
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40 | int eol = text.find (pos, '\n'); |
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41 | |
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42 | if (eol == cmt_string::npos) |
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43 | { |
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44 | // Last line, since there is no eol at all |
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45 | text.substr (pos, line); |
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46 | pos = max_pos; |
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47 | } |
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48 | else |
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49 | { |
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50 | int length = 1; |
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51 | |
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52 | int cr = text.find (pos, "\r\n"); |
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53 | |
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54 | if (cr == (eol-1)) |
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55 | { |
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56 | eol = cr; |
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57 | length = 2; |
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58 | } |
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59 | |
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60 | if (eol == pos) |
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61 | { |
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62 | // this is an empty line |
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63 | line = ""; |
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64 | pos += length; |
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65 | } |
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66 | else |
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67 | { |
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68 | // The eol was found beyond the current position |
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69 | // (ie. this is a non empty line) |
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70 | text.substr (pos, eol - pos, line); |
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71 | pos = eol + length; |
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72 | } |
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73 | } |
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74 | |
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75 | if (m_awk != 0) m_awk->inc_line_number (); |
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76 | |
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77 | //cout << "parse> line=[" << line << "]" << endl; |
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78 | |
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79 | result = parse_line (line); |
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80 | if (result != Awk::ok) break; |
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81 | } |
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82 | |
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83 | return (result); |
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84 | } |
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85 | |
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86 | /** |
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87 | * This second level parsing function accumulates individual lines |
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88 | * with real trailing back slashes. |
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89 | * Eventually the possible text pattern or regular expression is |
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90 | * checked and the Awk::filter function is called in case of |
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91 | * succesful match onto the accumulated line. |
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92 | */ |
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93 | Awk::condition parse_line (const cmt_string& line) |
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94 | { |
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95 | Awk::condition result = Awk::ok; |
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96 | int length; |
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97 | cmt_string temp_line = line; |
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98 | |
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99 | // |
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100 | // We scan the line for handling backslashes. |
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101 | // |
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102 | // Really terminating backslashes (ie those only followed by spaces/tabs |
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103 | // mean continued line |
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104 | // |
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105 | // |
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106 | |
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107 | bool finished = true; |
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108 | |
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109 | length = temp_line.size (); |
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110 | |
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111 | if (length == 0) |
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112 | { |
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113 | // An empty line following a backslash terminates the continuation. |
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114 | finished = true; |
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115 | } |
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116 | else |
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117 | { |
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118 | int back_slash = temp_line.find_last_of ('\\'); |
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119 | |
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120 | if (back_slash != cmt_string::npos) |
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121 | { |
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122 | // |
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123 | // This is the last backslash |
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124 | // check if there are only space chars after it |
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125 | // |
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126 | |
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127 | bool at_end = true; |
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128 | |
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129 | for (int i = (back_slash + 1); i < length; i++) |
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130 | { |
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131 | char c = temp_line[i]; |
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132 | if ((c != ' ') && (c != '\t')) |
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133 | { |
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134 | at_end = false; |
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135 | break; |
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136 | } |
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137 | } |
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138 | |
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139 | if (at_end) |
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140 | { |
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141 | temp_line.erase (back_slash); |
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142 | finished = false; |
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143 | } |
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144 | else |
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145 | { |
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146 | // This was not a trailing backslash. |
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147 | finished = true; |
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148 | } |
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149 | } |
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150 | |
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151 | m_accumulator += temp_line; |
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152 | } |
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153 | |
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154 | //cout << "parse_line1> accumulator=[" << m_accumulator << "]" << endl; |
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155 | //cout << "parse_line1> finished=[" << finished << "]" << endl; |
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156 | |
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157 | if (!finished) |
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158 | { |
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159 | // We still need to accumulate forthcoming lines |
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160 | // before parsing the resulting text. |
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161 | return (Awk::ok); |
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162 | } |
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163 | |
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164 | // now filter the complete accumulated line (if non empty) |
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165 | |
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166 | if (m_accumulator != "") |
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167 | { |
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168 | bool ok = false; |
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169 | |
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170 | if (m_expression != 0) |
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171 | { |
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172 | if (m_expression->match (m_accumulator)) |
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173 | { |
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174 | ok = true; |
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175 | } |
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176 | } |
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177 | else |
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178 | { |
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179 | if ((m_pattern == "") || |
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180 | (m_accumulator.find (m_pattern) != cmt_string::npos)) |
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181 | { |
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182 | ok = true; |
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183 | } |
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184 | } |
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185 | |
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186 | if (ok && (m_awk != 0)) |
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187 | { |
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188 | //cout << "parse_line> accumulator=[" << m_accumulator << "]" << endl; |
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189 | |
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190 | m_awk->filter (m_accumulator); |
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191 | result = m_awk->get_last_condition (); |
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192 | } |
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193 | |
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194 | m_accumulator.erase (0); |
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195 | } |
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196 | |
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197 | return (result); |
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198 | } |
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199 | |
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200 | private: |
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201 | |
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202 | cmt_string m_accumulator; |
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203 | cmt_string m_pattern; |
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204 | const cmt_regexp* m_expression; |
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205 | Awk* m_awk; |
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206 | }; |
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207 | |
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208 | //------------------------------------------------ |
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209 | Awk::Awk () |
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210 | { |
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211 | m_condition = ok; |
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212 | } |
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213 | |
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214 | //------------------------------------------------ |
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215 | Awk::~Awk () |
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216 | { |
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217 | } |
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218 | |
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219 | //------------------------------------------------ |
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220 | Awk::condition Awk::run (const cmt_string& text, |
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221 | const cmt_string& pattern) |
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222 | { |
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223 | m_line_number = 0; |
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224 | m_condition = ok; |
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225 | |
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226 | begin (); |
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227 | if (m_condition != ok) return (m_condition); |
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228 | |
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229 | if (CmtSystem::testenv ("CMTTESTAWK")) |
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230 | { |
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231 | Parser p (this, pattern, 0); |
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232 | |
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233 | m_condition = p.parse (text); |
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234 | if (m_condition != ok) return (m_condition); |
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235 | } |
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236 | else |
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237 | { |
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238 | cmt_string line; |
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239 | int pos = 0; |
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240 | int max_pos; |
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241 | |
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242 | max_pos = text.size (); |
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243 | |
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244 | for (pos = 0; pos < max_pos;) |
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245 | { |
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246 | int cr = text.find (pos, "\r\n"); |
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247 | int nl = text.find (pos, '\n'); |
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248 | |
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249 | // Get the first end-of-line (either lf or cr-lf) |
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250 | |
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251 | //-------------------- |
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252 | // |
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253 | // cr 1 0 |
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254 | // nl |
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255 | // |
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256 | // 1 a b |
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257 | // |
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258 | // 0 c d |
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259 | // |
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260 | //-------------------- |
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261 | |
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262 | int first = nl; |
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263 | |
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264 | if (cr != cmt_string::npos) |
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265 | { |
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266 | // cases a or c |
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267 | |
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268 | if (nl == cmt_string::npos) |
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269 | { |
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270 | // case a |
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271 | first = cr; |
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272 | } |
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273 | else |
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274 | { |
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275 | // case c |
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276 | first = (nl < cr) ? nl : cr; |
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277 | } |
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278 | } |
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279 | |
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280 | if (first == cmt_string::npos) |
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281 | { |
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282 | // This is likely the last line since there is no end-of-line |
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283 | text.substr (pos, line); |
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284 | pos = max_pos; |
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285 | } |
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286 | else if (first > pos) |
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287 | { |
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288 | // The eol was found beyond the current position |
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289 | // (ie. this is a non empty line) |
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290 | text.substr (pos, first - pos, line); |
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291 | pos = first + 1; |
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292 | } |
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293 | else |
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294 | { |
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295 | // an empty line |
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296 | line = ""; |
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297 | pos++; |
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298 | } |
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299 | |
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300 | m_line_number++; |
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301 | |
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302 | if (line != "") |
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303 | { |
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304 | if ((pattern == "") || |
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305 | (line.find (pattern) != cmt_string::npos)) |
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306 | { |
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307 | filter (line); |
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308 | if (m_condition != ok) return (m_condition); |
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309 | } |
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310 | } |
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311 | } |
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312 | } |
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313 | |
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314 | end (); |
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315 | |
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316 | return (m_condition); |
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317 | } |
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318 | |
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319 | //------------------------------------------------ |
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320 | Awk::condition Awk::run (const cmt_string& text, |
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321 | const cmt_regexp& expression) |
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322 | { |
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323 | m_line_number = 0; |
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324 | m_condition = ok; |
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325 | |
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326 | begin (); |
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327 | if (m_condition != ok) return (m_condition); |
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328 | |
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329 | Parser p (this, "", &expression); |
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330 | |
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331 | m_condition = p.parse (text); |
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332 | if (m_condition != ok) return (m_condition); |
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333 | |
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334 | /* |
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335 | if (CmtSystem::testenv ("CMTTESTAWK")) |
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336 | { |
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337 | } |
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338 | else |
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339 | { |
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340 | cmt_string line; |
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341 | int pos = 0; |
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342 | int max_pos; |
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343 | |
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344 | max_pos = text.size (); |
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345 | |
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346 | for (pos = 0; pos < max_pos;) |
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347 | { |
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348 | int cr = text.find (pos, "\r\n"); |
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349 | int nl = text.find (pos, '\n'); |
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350 | |
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351 | // Get the first end-of-line (either lf or cr-lf) |
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352 | |
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353 | int first = nl; |
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354 | |
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355 | if (cr != cmt_string::npos) |
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356 | { |
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357 | if (nl == cmt_string::npos) |
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358 | { |
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359 | first = cr; |
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360 | } |
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361 | else |
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362 | { |
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363 | first = (nl < cr) ? nl : cr; |
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364 | } |
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365 | } |
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366 | |
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367 | if (first == cmt_string::npos) |
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368 | { |
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369 | // This is likely the last line since there is no end-of-line |
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370 | text.substr (pos, line); |
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371 | pos = max_pos; |
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372 | } |
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373 | else if (first > pos) |
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374 | { |
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375 | // The eol was found beyond the current position |
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376 | // (ie. this is a non empty line) |
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377 | text.substr (pos, first - pos, line); |
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378 | pos = first + 1; |
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379 | } |
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380 | else |
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381 | { |
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382 | // an empty line |
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383 | line = ""; |
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384 | pos++; |
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385 | } |
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386 | |
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387 | m_line_number++; |
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388 | |
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389 | if (line != "") |
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390 | { |
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391 | if (expression.match (line)) |
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392 | { |
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393 | filter (line); |
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394 | if (m_condition != ok) return (m_condition); |
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395 | } |
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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 | end (); |
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402 | |
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403 | return (m_condition); |
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404 | } |
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405 | |
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406 | //------------------------------------------------ |
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407 | void Awk::stop () |
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408 | { |
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409 | m_condition = stopped; |
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410 | } |
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411 | |
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412 | //------------------------------------------------ |
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413 | void Awk::abort () |
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414 | { |
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415 | m_condition = failed; |
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416 | } |
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417 | |
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418 | //------------------------------------------------ |
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419 | void Awk::allow_continuation () |
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420 | { |
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421 | m_continuation_allowed = true; |
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422 | } |
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423 | |
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424 | //------------------------------------------------ |
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425 | Awk::condition Awk::get_last_condition () const |
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426 | { |
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427 | return (m_condition); |
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428 | } |
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429 | |
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430 | //------------------------------------------------ |
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431 | void Awk::begin () |
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432 | { |
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433 | } |
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434 | |
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435 | //------------------------------------------------ |
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436 | void Awk::filter (const cmt_string& /*line*/) |
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437 | { |
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438 | //cout << "awk> " << line << endl; |
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439 | } |
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440 | |
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441 | //------------------------------------------------ |
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442 | void Awk::end () |
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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 | void Awk::inc_line_number () |
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448 | { |
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449 | m_line_number++; |
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450 | } |
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451 | |
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452 | //------------------------------------------------ |
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453 | Awk::condition FAwk::run (const cmt_string& file_name, |
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454 | const cmt_string& pattern) |
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455 | { |
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456 | if (!CmtSystem::test_file (file_name)) return (failed); |
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457 | |
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458 | CmtSystem::basename (file_name, m_file_name); |
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459 | CmtSystem::dirname (file_name, m_dir_name); |
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460 | |
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461 | cmt_string text; |
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462 | |
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463 | text.read (file_name); |
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464 | |
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465 | return (Awk::run (text, pattern)); |
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466 | } |
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467 | |
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468 | //------------------------------------------------ |
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469 | Awk::condition FAwk::run (const cmt_string& file_name, |
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470 | const cmt_regexp& expression) |
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471 | { |
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472 | if (!CmtSystem::test_file (file_name)) return (failed); |
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473 | |
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474 | CmtSystem::basename (file_name, m_file_name); |
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475 | CmtSystem::dirname (file_name, m_dir_name); |
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476 | |
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477 | cmt_string text; |
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478 | |
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479 | text.read (file_name); |
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480 | |
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481 | return (Awk::run (text, expression)); |
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482 | } |
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483 | |
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484 | //------------------------------------------------ |
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485 | Awk::condition PAwk::run (const cmt_string& command, |
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486 | const cmt_string& pattern) |
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487 | { |
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488 | cmt_string line; |
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489 | |
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490 | m_line_number = 0; |
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491 | m_condition = ok; |
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492 | |
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493 | begin (); |
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494 | if (m_condition != ok) return (m_condition); |
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495 | |
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496 | FILE* f = popen (command.c_str (), "r"); |
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497 | |
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498 | if (f == 0) return (failed); |
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499 | |
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500 | char buffer[8192]; |
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501 | char* ptr; |
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502 | |
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503 | while ((ptr = fgets (buffer, sizeof (buffer), f)) != NULL) |
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504 | { |
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505 | line = ptr; |
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506 | |
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507 | if (line.find ("\n") == cmt_string::npos) |
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508 | { |
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509 | cerr << "#CMT> Warning : Line too long and truncated in PAwk::run for command " << command << endl; |
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510 | } |
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511 | |
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512 | line.replace ("\n", ""); |
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513 | |
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514 | m_line_number++; |
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515 | |
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516 | if (line != "") |
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517 | { |
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518 | if ((pattern == "") || |
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519 | (line.find (pattern) != cmt_string::npos)) |
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520 | { |
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521 | filter (line); |
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522 | if (m_condition != ok) return (m_condition); |
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523 | } |
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524 | } |
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525 | } |
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526 | |
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527 | pclose (f); |
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528 | |
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529 | end (); |
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530 | |
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531 | return (m_condition); |
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532 | } |
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533 | |
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534 | //------------------------------------------------ |
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535 | Awk::condition PAwk::run (const cmt_string& command, |
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536 | const cmt_regexp& expression) |
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537 | { |
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538 | cmt_string line; |
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539 | |
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540 | m_line_number = 0; |
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541 | m_condition = ok; |
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542 | |
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543 | begin (); |
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544 | if (m_condition != ok) return (m_condition); |
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545 | |
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546 | FILE* f = popen (command.c_str (), "r"); |
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547 | |
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548 | if (f == 0) return (failed); |
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549 | |
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550 | char buffer[256]; |
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551 | char* ptr; |
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552 | |
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553 | while ((ptr = fgets (buffer, sizeof (buffer), f)) != NULL) |
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554 | { |
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555 | line = ptr; |
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556 | |
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557 | line.replace ("\n", ""); |
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558 | |
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559 | m_line_number++; |
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560 | |
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561 | if (line != "") |
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562 | { |
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563 | if (expression.match (line)) |
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564 | { |
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565 | filter (line); |
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566 | if (m_condition != ok) return (m_condition); |
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567 | } |
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568 | } |
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569 | } |
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570 | |
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571 | pclose (f); |
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572 | |
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573 | end (); |
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574 | |
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575 | return (m_condition); |
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576 | } |
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577 | |
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