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 outfile="scanner.c" prefix="test" 31 %option nounput nomain noyywrap 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 if ((fp = fopen(argv[1],"r")) == NULL){ 56 perror("Failed to open input file."); 57 return 1; 58 } 59 60 printf("Test 1: Reusing same scanner.\n"); 61 yylex_init( &yyscanner ); 62 yyset_out ( stdout, yyscanner); 63 64 for (i=0; i < 4; ++i){ 65 66 rewind(fp); 67 yyset_in ( fp, yyscanner); 68 69 while( yylex(yyscanner) ) 70 ; 71 } 72 yylex_destroy( yyscanner ); 73 printf("Test 1 OK\n\n"); 74 75 printf("Test 2: Rescanning with new scanner each time.\n"); 76 77 memset(&yyscanner,0,sizeof(yyscanner)); // Just to be clean about it. 78 79 for (i=0; i < 4; ++i){ 80 yyscan_t s; 81 yylex_init( &s ); 82 yyset_out ( stdout, s); 83 rewind(fp); 84 yyset_in ( fp, s); 85 86 while( yylex(s) ) 87 ; 88 yylex_destroy( s ); 89 } 90 printf("Test 2 OK\n\n"); 91 92 93 printf("TEST RETURNING OK.\n"); 94 return 0; 95 } 96