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Diffstat (limited to 'tests/yyextra_c99.l')
-rw-r--r-- | tests/yyextra_c99.l | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/tests/yyextra_c99.l b/tests/yyextra_c99.l new file mode 100644 index 0000000..4486882 --- /dev/null +++ b/tests/yyextra_c99.l @@ -0,0 +1,120 @@ +/* + * This file is part of flex. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE. + */ + +%{ +/* A file to build "scanner.c". */ +/* This tests that we can use "yyextra". + We buffer all input into a growable array, then print it. + We run diff on the input and output. +*/ + +#include <stdio.h> +#include <stdlib.h> +#include "config.h" + + +/* We'll store the entire input in this buffer, growing as necessary. */ +struct Buffer { + int curr_len; + int max_len; + int grow_len; + char * data; +}; + +/* Save char into junk array at next position. */ +static void append_char (char c, yyscan_t scanner ); + +%} + +%option emit="c99" +%option 8bit prefix="test" +%option nounput nomain noyywrap nodefault noyyinput +%option warn +%option extra-type="struct Buffer *" + +%% + +.|\r|\n { append_char (yytext[0],yyscanner); } + +%% + +int main(void); + +int +main (void) +{ + yyscan_t scanner; + struct Buffer * buf; + int i; + + buf = malloc(sizeof(struct Buffer)); + buf->curr_len =0; + buf->max_len = 4; + buf->grow_len = 100; + buf->data = malloc((size_t) buf->max_len); + + testlex_init(&scanner); + testset_in( stdin, scanner); + testset_out( stdout, scanner); + testset_extra( buf, scanner ); + testlex(scanner); + + buf = testget_extra(scanner); + for(i=0; i < buf->curr_len; i++) + fputc( buf->data[i], stdout ); + free( buf->data); + free( buf); + + testlex_destroy(scanner); + return 0; +} + +/* Save char into junk array at next position. */ +static void append_char (char c, yyscan_t scanner ) +{ + struct Buffer *buf, *new_buf; + buf = testget_extra(scanner); + + /* Grow buffer if necessary. */ + + if( buf->curr_len >= buf->max_len ) + { + new_buf = malloc(sizeof(struct Buffer)); + new_buf->max_len = buf->max_len + buf->grow_len; + new_buf->grow_len = buf->grow_len; + new_buf->data = malloc((size_t) new_buf->max_len); + for( new_buf->curr_len = 0; + new_buf->curr_len < buf->curr_len; + new_buf->curr_len++ ) + { + new_buf->data[ new_buf->curr_len] = buf->data [ new_buf->curr_len]; + } + free( buf->data ); + free( buf ); + buf = new_buf; + testset_extra( buf, scanner ); + } + + + buf->data[ buf->curr_len++ ] = c; +} |