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/*
* 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 template scanner file to build "scanner.c". */
#include <stdio.h>
#include <stdlib.h>
%}
%option 8bit outfile="scanner.c" prefix="test"
%option nounput nomain noyywrap reentrant
%option warn stack never-interactive
%x STATE_1
%%
<INITIAL>{
0 yy_push_state (STATE_1, yyscanner);
.|\n return 1;
}
<STATE_1>{
1 yy_pop_state(yyscanner);
.|\n return yy_top_state(yyscanner) + 1;
}
%%
int
main (int argc, char* const argv[])
{
FILE* fp;
int i;
yyscan_t yyscanner;
if ((fp = fopen(argv[1],"r")) == NULL){
perror("Failed to open input file.");
return 1;
}
printf("Test 1: Reusing same scanner.\n");
yylex_init( &yyscanner );
yyset_out ( stdout, yyscanner);
for (i=0; i < 4; ++i){
rewind(fp);
yyset_in ( fp, yyscanner);
while( yylex(yyscanner) )
;
}
yylex_destroy( yyscanner );
printf("Test 1 OK\n\n");
printf("Test 2: Rescanning with new scanner each time.\n");
memset(&yyscanner,0,sizeof(yyscanner)); // Just to be clean about it.
for (i=0; i < 4; ++i){
yyscan_t s;
yylex_init( &s );
yyset_out ( stdout, s);
rewind(fp);
yyset_in ( fp, s);
while( yylex(s) )
;
yylex_destroy( s );
}
printf("Test 2 OK\n\n");
printf("TEST RETURNING OK.\n");
return 0;
}
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