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 template scanner file to build "scanner.c". */ 26 #include <stdio.h> 27 #include <stdlib.h> 28 %} 29 30 %option 8bit prefix="test" 31 %option nounput nomain noyywrap noinput reentrant 32 %option warn stack never-interactive 33 %x STATE_1 34 35 %% 36 37 <INITIAL>{ 38 0 yy_push_state (STATE_1, yyscanner); 39 .|\n return 1; 40 } 41 <STATE_1>{ 42 1 yy_pop_state(yyscanner); 43 .|\n return yy_top_state(yyscanner) + 1; 44 } 45 46 %% 47 48 int 49 main (int argc, char* const argv[]) 50 { 51 FILE* fp; 52 int i; 53 yyscan_t yyscanner; 54 55 (void)argc; 56 57 if ((fp = fopen(argv[1],"r")) == NULL){ 58 perror("Failed to open input file."); 59 return 1; 60 } 61 62 printf("Test 1: Reusing same scanner.\n"); 63 yylex_init( &yyscanner ); 64 yyset_out ( stdout, yyscanner); 65 66 for (i=0; i < 4; ++i){ 67 68 rewind(fp); 69 yyset_in ( fp, yyscanner); 70 71 while( yylex(yyscanner) ) 72 ; 73 } 74 yylex_destroy( yyscanner ); 75 printf("Test 1 OK\n\n"); 76 77 printf("Test 2: Rescanning with new scanner each time.\n"); 78 79 memset(&yyscanner,0,sizeof(yyscanner)); // Just to be clean about it. 80 81 for (i=0; i < 4; ++i){ 82 yyscan_t s; 83 yylex_init( &s ); 84 yyset_out ( stdout, s); 85 rewind(fp); 86 yyset_in ( fp, s); 87 88 while( yylex(s) ) 89 ; 90 yylex_destroy( s ); 91 } 92 printf("Test 2 OK\n\n"); 93 94 95 printf("TEST RETURNING OK.\n"); 96 return 0; 97 } 98