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4358 | Serge | 1 | %{ |
2 | /* |
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3 | * Copyright © 2010 Intel Corporation |
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4 | * |
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5 | * Permission is hereby granted, free of charge, to any person obtaining a |
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6 | * copy of this software and associated documentation files (the "Software"), |
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7 | * to deal in the Software without restriction, including without limitation |
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8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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9 | * and/or sell copies of the Software, and to permit persons to whom the |
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10 | * Software is furnished to do so, subject to the following conditions: |
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11 | * |
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12 | * The above copyright notice and this permission notice (including the next |
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13 | * paragraph) shall be included in all copies or substantial portions of the |
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14 | * Software. |
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15 | * |
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16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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21 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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22 | * DEALINGS IN THE SOFTWARE. |
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23 | */ |
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24 | |||
25 | #include |
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26 | #include |
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27 | #include |
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28 | |||
29 | #include "glcpp.h" |
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30 | #include "glcpp-parse.h" |
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31 | |||
32 | /* Flex annoyingly generates some functions without making them |
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33 | * static. Let's declare them here. */ |
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34 | int glcpp_get_column (yyscan_t yyscanner); |
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35 | void glcpp_set_column (int column_no , yyscan_t yyscanner); |
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36 | |||
37 | #ifdef _MSC_VER |
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38 | #define YY_NO_UNISTD_H |
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39 | #endif |
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40 | |||
41 | #define YY_NO_INPUT |
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42 | |||
43 | #define YY_USER_ACTION \ |
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44 | do { \ |
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45 | if (parser->has_new_line_number) \ |
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46 | yylineno = parser->new_line_number; \ |
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47 | if (parser->has_new_source_number) \ |
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48 | yylloc->source = parser->new_source_number; \ |
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49 | yylloc->first_column = yycolumn + 1; \ |
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50 | yylloc->first_line = yylineno; \ |
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51 | yycolumn += yyleng; \ |
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52 | parser->has_new_line_number = 0; \ |
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53 | parser->has_new_source_number = 0; \ |
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54 | } while(0); |
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55 | |||
56 | #define YY_USER_INIT \ |
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57 | do { \ |
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58 | yylineno = 1; \ |
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59 | yycolumn = 1; \ |
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60 | yylloc->source = 0; \ |
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61 | } while(0) |
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62 | %} |
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63 | |||
64 | %option bison-bridge bison-locations reentrant noyywrap |
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65 | %option extra-type="glcpp_parser_t *" |
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66 | %option prefix="glcpp_" |
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67 | %option stack |
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68 | %option never-interactive |
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69 | |||
70 | %x DONE COMMENT UNREACHABLE SKIP DEFINE |
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71 | |||
72 | SPACE [[:space:]] |
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73 | NONSPACE [^[:space:]] |
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74 | NEWLINE [\n] |
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75 | HSPACE [ \t] |
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76 | HASH ^{HSPACE}*#{HSPACE}* |
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77 | IDENTIFIER [_a-zA-Z][_a-zA-Z0-9]* |
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78 | PUNCTUATION [][(){}.&*~!/%<>^|;,=+-] |
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79 | |||
80 | /* The OTHER class is simply a catch-all for things that the CPP |
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81 | parser just doesn't care about. Since flex regular expressions that |
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82 | match longer strings take priority over those matching shorter |
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83 | strings, we have to be careful to avoid OTHER matching and hiding |
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84 | something that CPP does care about. So we simply exclude all |
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85 | characters that appear in any other expressions. */ |
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86 | |||
87 | OTHER [^][_#[:space:]#a-zA-Z0-9(){}.&*~!/%<>^|;,=+-] |
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88 | |||
89 | DIGITS [0-9][0-9]* |
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90 | DECIMAL_INTEGER [1-9][0-9]*[uU]? |
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91 | OCTAL_INTEGER 0[0-7]*[uU]? |
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92 | HEXADECIMAL_INTEGER 0[xX][0-9a-fA-F]+[uU]? |
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93 | |||
94 | %% |
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95 | /* Implicitly switch between SKIP and INITIAL (non-skipping); |
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96 | * don't switch if some other state was explicitly set. |
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97 | */ |
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98 | glcpp_parser_t *parser = yyextra; |
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99 | if (YY_START == 0 || YY_START == SKIP) { |
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100 | if (parser->lexing_if || parser->skip_stack == NULL || parser->skip_stack->type == SKIP_NO_SKIP) { |
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101 | BEGIN 0; |
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102 | } else { |
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103 | BEGIN SKIP; |
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104 | } |
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105 | } |
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106 | |||
107 | /* Single-line comments */ |
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108 | "//"[^\n]* { |
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109 | } |
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110 | |||
111 | /* Multi-line comments */ |
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112 | "/*" { yy_push_state(COMMENT, yyscanner); } |
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113 |
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114 |
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115 |
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116 |
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117 |
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118 | yy_pop_state(yyscanner); |
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119 | if (yyextra->space_tokens) |
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120 | return SPACE; |
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121 | } |
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122 | |||
123 | {HASH}version{HSPACE}+ { |
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124 | yylval->str = ralloc_strdup (yyextra, yytext); |
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125 | yyextra->space_tokens = 0; |
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126 | return HASH_VERSION; |
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127 | } |
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128 | |||
129 | /* glcpp doesn't handle #extension, #version, or #pragma directives. |
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130 | * Simply pass them through to the main compiler's lexer/parser. */ |
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131 | {HASH}(extension|pragma)[^\n]+ { |
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132 | yylval->str = ralloc_strdup (yyextra, yytext); |
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133 | yylineno++; |
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134 | yycolumn = 0; |
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135 | return OTHER; |
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136 | } |
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137 | |||
138 | {HASH}line{HSPACE}+ { |
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139 | return HASH_LINE; |
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140 | } |
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141 | |||
142 |
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143 | {HASH}ifdef { |
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144 | yyextra->lexing_if = 1; |
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145 | yyextra->space_tokens = 0; |
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146 | return HASH_IFDEF; |
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147 | } |
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148 | |||
149 | {HASH}ifndef { |
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150 | yyextra->lexing_if = 1; |
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151 | yyextra->space_tokens = 0; |
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152 | return HASH_IFNDEF; |
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153 | } |
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154 | |||
155 | {HASH}if/[^_a-zA-Z0-9] { |
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156 | yyextra->lexing_if = 1; |
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157 | yyextra->space_tokens = 0; |
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158 | return HASH_IF; |
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159 | } |
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160 | |||
161 | {HASH}elif/[^_a-zA-Z0-9] { |
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162 | yyextra->lexing_if = 1; |
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163 | yyextra->space_tokens = 0; |
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164 | return HASH_ELIF; |
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165 | } |
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166 | |||
167 | {HASH}else { |
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168 | yyextra->space_tokens = 0; |
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169 | return HASH_ELSE; |
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170 | } |
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171 | |||
172 | {HASH}endif { |
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173 | yyextra->space_tokens = 0; |
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174 | return HASH_ENDIF; |
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175 | } |
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176 | } |
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177 | |||
178 |
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179 | |||
180 | {HASH}error.* { |
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181 | char *p; |
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182 | for (p = yytext; !isalpha(p[0]); p++); /* skip " # " */ |
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183 | p += 5; /* skip "error" */ |
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184 | glcpp_error(yylloc, yyextra, "#error%s", p); |
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185 | } |
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186 | |||
187 | {HASH}define{HSPACE}+ { |
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188 | yyextra->space_tokens = 0; |
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189 | yy_push_state(DEFINE, yyscanner); |
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190 | return HASH_DEFINE; |
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191 | } |
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192 | |||
193 |
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194 | yy_pop_state(yyscanner); |
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195 | yylval->str = ralloc_strdup (yyextra, yytext); |
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196 | return FUNC_IDENTIFIER; |
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197 | } |
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198 | |||
199 |
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200 | yy_pop_state(yyscanner); |
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201 | yylval->str = ralloc_strdup (yyextra, yytext); |
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202 | return OBJ_IDENTIFIER; |
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203 | } |
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204 | |||
205 | {HASH}undef { |
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206 | yyextra->space_tokens = 0; |
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207 | return HASH_UNDEF; |
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208 | } |
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209 | |||
210 | {HASH} { |
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211 | yyextra->space_tokens = 0; |
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212 | return HASH; |
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213 | } |
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214 | |||
215 | {DECIMAL_INTEGER} { |
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216 | yylval->str = ralloc_strdup (yyextra, yytext); |
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217 | return INTEGER_STRING; |
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218 | } |
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219 | |||
220 | {OCTAL_INTEGER} { |
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221 | yylval->str = ralloc_strdup (yyextra, yytext); |
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222 | return INTEGER_STRING; |
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223 | } |
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224 | |||
225 | {HEXADECIMAL_INTEGER} { |
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226 | yylval->str = ralloc_strdup (yyextra, yytext); |
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227 | return INTEGER_STRING; |
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228 | } |
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229 | |||
230 | "<<" { |
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231 | return LEFT_SHIFT; |
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232 | } |
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233 | |||
234 | ">>" { |
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235 | return RIGHT_SHIFT; |
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236 | } |
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237 | |||
238 | "<=" { |
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239 | return LESS_OR_EQUAL; |
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240 | } |
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241 | |||
242 | ">=" { |
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243 | return GREATER_OR_EQUAL; |
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244 | } |
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245 | |||
246 | "==" { |
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247 | return EQUAL; |
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248 | } |
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249 | |||
250 | "!=" { |
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251 | return NOT_EQUAL; |
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252 | } |
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253 | |||
254 | "&&" { |
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255 | return AND; |
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256 | } |
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257 | |||
258 | "||" { |
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259 | return OR; |
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260 | } |
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261 | |||
262 | "##" { |
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263 | if (parser->is_gles) |
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264 | glcpp_error(yylloc, yyextra, "Token pasting (##) is illegal in GLES"); |
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265 | return PASTE; |
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266 | } |
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267 | |||
268 | "defined" { |
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269 | return DEFINED; |
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270 | } |
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271 | |||
272 | {IDENTIFIER} { |
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273 | yylval->str = ralloc_strdup (yyextra, yytext); |
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274 | return IDENTIFIER; |
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275 | } |
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276 | |||
277 | {PUNCTUATION} { |
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278 | return yytext[0]; |
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279 | } |
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280 | |||
281 | {OTHER}+ { |
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282 | yylval->str = ralloc_strdup (yyextra, yytext); |
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283 | return OTHER; |
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284 | } |
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285 | |||
286 | {HSPACE}+ { |
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287 | if (yyextra->space_tokens) { |
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288 | return SPACE; |
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289 | } |
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290 | } |
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291 | |||
292 |
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293 | yyextra->lexing_if = 0; |
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294 | yylineno++; |
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295 | yycolumn = 0; |
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296 | return NEWLINE; |
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297 | } |
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298 | |||
299 | /* Handle missing newline at EOF. */ |
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300 |
|
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301 | BEGIN DONE; /* Don't keep matching this rule forever. */ |
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302 | yyextra->lexing_if = 0; |
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303 | return NEWLINE; |
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304 | } |
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305 | |||
306 | /* We don't actually use the UNREACHABLE start condition. We |
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307 | only have this action here so that we can pretend to call some |
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308 | generated functions, (to avoid "defined but not used" |
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309 | warnings. */ |
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310 |
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311 | unput('.'); |
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312 | yy_top_state(yyextra); |
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313 | } |
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314 | |||
315 | %% |
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316 | |||
317 | void |
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318 | glcpp_lex_set_source_string(glcpp_parser_t *parser, const char *shader) |
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319 | { |
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320 | yy_scan_string(shader, parser->scanner); |
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321 | } |