1 /* 2 * This file is part of flex. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE. 22 */ 23 24 %{ 25 /* A file to build "scanner.c". */ 26 /* This tests that we can use "yyextra". 27 We buffer all input into a growable array, then print it. 28 We run diff on the input and output. 29 */ 30 31 #include <stdio.h> 32 #include <stdlib.h> 33 #include "config.h" 34 35 36 /* We'll store the entire input in this buffer, growing as necessary. */ 37 struct Buffer { 38 int curr_len; 39 int max_len; 40 int grow_len; 41 char * data; 42 }; 43 #define YY_EXTRA_TYPE struct Buffer * 44 45 /* Save char into junk array at next position. */ 46 static void append_char (char c, yyscan_t scanner ); 47 48 %} 49 50 %option 8bit prefix="test" 51 %option nounput nomain noyywrap nodefault noinput 52 %option warn 53 %option reentrant 54 55 56 %% 57 58 .|\r|\n { append_char (yytext[0],yyscanner); } 59 60 %% 61 62 int main(void); 63 64 int 65 main (void) 66 { 67 yyscan_t scanner; 68 struct Buffer * buf; 69 int i; 70 71 buf = malloc(sizeof(struct Buffer)); 72 buf->curr_len =0; 73 buf->max_len = 4; 74 buf->grow_len = 100; 75 buf->data = malloc((size_t) buf->max_len); 76 77 testlex_init(&scanner); 78 testset_in( stdin, scanner); 79 testset_out( stdout, scanner); 80 testset_extra( buf, scanner ); 81 testlex(scanner); 82 83 buf = testget_extra(scanner); 84 for(i=0; i < buf->curr_len; i++) 85 fputc( buf->data[i], stdout ); 86 free( buf->data); 87 free( buf); 88 89 testlex_destroy(scanner); 90 return 0; 91 } 92 93 /* Save char into junk array at next position. */ 94 static void append_char (char c, yyscan_t scanner ) 95 { 96 struct Buffer *buf, *new_buf; 97 buf = testget_extra(scanner); 98 99 /* Grow buffer if necessary. */ 100 101 if( buf->curr_len >= buf->max_len ) 102 { 103 new_buf = malloc(sizeof(struct Buffer)); 104 new_buf->max_len = buf->max_len + buf->grow_len; 105 new_buf->grow_len = buf->grow_len; 106 new_buf->data = malloc((size_t) new_buf->max_len); 107 for( new_buf->curr_len = 0; 108 new_buf->curr_len < buf->curr_len; 109 new_buf->curr_len++ ) 110 { 111 new_buf->data[ new_buf->curr_len] = buf->data [ new_buf->curr_len]; 112 } 113 free( buf->data ); 114 free( buf ); 115 buf = new_buf; 116 testset_extra( buf, scanner ); 117 } 118 119 120 buf->data[ buf->curr_len++ ] = c; 121 } 122