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Diffstat (limited to 'glcpp/glcpp-lex.l')
| -rw-r--r-- | glcpp/glcpp-lex.l | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/glcpp/glcpp-lex.l b/glcpp/glcpp-lex.l new file mode 100644 index 0000000000..0d9a75415a --- /dev/null +++ b/glcpp/glcpp-lex.l @@ -0,0 +1,202 @@ +%{ +/* + * Copyright © 2010 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#include <stdio.h> +#include <string.h> + +#include "glcpp.h" +#include "glcpp-parse.h" +%} + +%option reentrant noyywrap +%option extra-type="glcpp_parser_t *" + +SPACE [[:space:]] +NONSPACE [^[:space:]] +NEWLINE [\n] +HSPACE [ \t] +HASH ^{HSPACE}*#{HSPACE}* +IDENTIFIER [_a-zA-Z][_a-zA-Z0-9]* +PUNCTUATION [][(){}.&*~!/%<>^|;,=+-] +OTHER [^][(){}.&*~!/%<>^|;,=#[:space:]+-]+ + +DECIMAL_INTEGER [1-9][0-9]*[uU]? +OCTAL_INTEGER 0[0-7]*[uU]? +HEXADECIMAL_INTEGER 0[xX][0-9a-fA-F]+[uU]? + +NON_STARS_THEN_STARS [^*]*[*]+ + +%% + + /* Single-line comments */ +"//"[^\n]+\n { + return NEWLINE; +} + + /* Multi-line comments */ +"/*"({NON_STARS_THEN_STARS}[^*/])*{NON_STARS_THEN_STARS}"/" { + if (yyextra->space_tokens) + return SPACE; +} + +{HASH}if/.*\n { + yyextra->lexing_if = 1; + yyextra->space_tokens = 0; + return HASH_IF; +} + +{HASH}elif/.*\n { + yyextra->lexing_if = 1; + yyextra->space_tokens = 0; + return HASH_ELIF; +} + +{HASH}else/.*\n { + yyextra->space_tokens = 0; + return HASH_ELSE; +} + +{HASH}endif/.*\n { + yyextra->space_tokens = 0; + return HASH_ENDIF; +} + + /* When skipping (due to an #if 0 or similar) consume anything + * up to a newline. We do this less priroty than any + * #if-related directive (#if, #elif, #else, #endif), but with + * more priority than any other directive or token to avoid + * any side-effects from skipped content. + * + * We use the lexing_if flag to avoid skipping any part of an + * if conditional expression. */ +[^\n]+/\n { + if (yyextra->lexing_if || + yyextra->skip_stack == NULL || + yyextra->skip_stack->type == SKIP_NO_SKIP) + { + REJECT; + } +} + +{HASH}define{HSPACE}+/{IDENTIFIER}"(" { + yyextra->space_tokens = 0; + return HASH_DEFINE_FUNC; +} + +{HASH}define { + yyextra->space_tokens = 0; + return HASH_DEFINE_OBJ; +} + +{HASH}undef { + yyextra->space_tokens = 0; + return HASH_UNDEF; +} + +{HASH} { + yyextra->space_tokens = 0; + return HASH; +} + +{DECIMAL_INTEGER} { + yylval.str = xtalloc_strdup (yyextra, yytext); + return INTEGER_STRING; +} + +{OCTAL_INTEGER} { + yylval.str = xtalloc_strdup (yyextra, yytext); + return INTEGER_STRING; +} + +{HEXADECIMAL_INTEGER} { + yylval.str = xtalloc_strdup (yyextra, yytext); + return INTEGER_STRING; +} + +"<<" { + return LEFT_SHIFT; +} + +">>" { + return RIGHT_SHIFT; +} + +"<=" { + return LESS_OR_EQUAL; +} + +">=" { + return GREATER_OR_EQUAL; +} + +"==" { + return EQUAL; +} + +"!=" { + return NOT_EQUAL; +} + +"&&" { + return AND; +} + +"||" { + return OR; +} + +"##" { + return PASTE; +} + +"defined" { + return DEFINED; +} + +{IDENTIFIER} { + yylval.str = xtalloc_strdup (yyextra, yytext); + return IDENTIFIER; +} + +{PUNCTUATION} { + return yytext[0]; +} + +{OTHER}+ { + yylval.str = xtalloc_strdup (yyextra, yytext); + return OTHER; +} + +{HSPACE}+ { + if (yyextra->space_tokens) { + return SPACE; + } +} + +\n { + yyextra->lexing_if = 0; + return NEWLINE; +} + +%% |