98 lines
2.4 KiB
Text
98 lines
2.4 KiB
Text
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/* $NetBSD: scanner.l,v 1.1.1.1 2009/10/26 00:29:12 christos Exp $ */
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/*
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* This file is part of flex.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE.
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*/
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%{
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/* A template scanner file to build "scanner.c". */
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#include <stdio.h>
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#include <stdlib.h>
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%}
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%option 8bit outfile="scanner.c" prefix="test"
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%option nounput nomain noyywrap reentrant
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%option warn stack never-interactive
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%x STATE_1
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%%
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<INITIAL>{
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0 yy_push_state (STATE_1, yyscanner);
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.|\n return 1;
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}
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<STATE_1>{
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1 yy_pop_state(yyscanner);
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.|\n return yy_top_state(yyscanner) + 1;
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}
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%%
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int
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main (int argc, char* const argv[])
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{
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FILE* fp;
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int i;
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yyscan_t yyscanner;
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if ((fp = fopen(argv[1],"r")) == NULL){
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perror("Failed to open input file.");
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return 1;
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}
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printf("Test 1: Reusing same scanner.\n");
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yylex_init( &yyscanner );
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yyset_out ( stdout, yyscanner);
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for (i=0; i < 4; ++i){
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rewind(fp);
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yyset_in ( fp, yyscanner);
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while( yylex(yyscanner) )
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;
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}
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yylex_destroy( yyscanner );
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printf("Test 1 OK\n\n");
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printf("Test 2: Rescanning with new scanner each time.\n");
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memset(&yyscanner,0,sizeof(yyscanner)); // Just to be clean about it.
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for (i=0; i < 4; ++i){
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yyscan_t s;
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yylex_init( &s );
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yyset_out ( stdout, s);
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rewind(fp);
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yyset_in ( fp, s);
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while( yylex(s) )
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;
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yylex_destroy( s );
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}
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printf("Test 2 OK\n\n");
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printf("TEST RETURNING OK.\n");
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return 0;
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}
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