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/* This file is part of the software similarity tester SIM.
Written by Dick Grune, Vrije Universiteit, Amsterdam.
$Id: stream.c,v 2.7 2001/11/08 12:30:32 dick Exp $
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "system.par"
#include "token.h"
#include "lex.h"
#include "lang.h"
#include "stream.h"
static FILE *fopen_regular_file(const char *fname);
int
OpenStream(const char *fname) {
int ok;
lex_nl_cnt = 1;
lex_tk_cnt = 0;
lex_non_ascii_cnt = 0;
/* start the lex machine */
yyin = fopen_regular_file(fname);
ok = (yyin != 0);
if (!ok) {
/* fake a stream, to simplify the rest of the program */
yyin = fopen(NULLFILE, "r");
}
yystart();
return ok;
}
static FILE *fopen_regular_file(const char *fname) {
struct stat buf;
if (stat(fname, &buf) != 0) return 0;
if ((buf.st_mode & S_IFMT) != S_IFREG) return 0;
return fopen(fname, "r");
}
int
NextStreamTokenObtained(void) {
return yylex();
}
void
CloseStream(void) {
if (yyin) {
fclose(yyin);
yyin = 0;
}
}
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