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/*
* This is an interface to the posix regular-expression matching.
*/
#include "localsys.h"
#ifdef HAVE_POSIX_REGEX
static regex_t compiled_pattern; /* for storing a compiled pattern */
static int free_pattern = 0; /* set !0 if a later call to p_compile()
* should free the compiled pattern.
*/
static int posix_flags = 0; /* user-specified regcomp flags */
/*
* Specify cflags for use in future regcomp() calls.
*/
void
p_regcomp_flags(cflags)
int cflags;
{
posix_flags |= cflags;
}
/*
* Compile a pattern and store in compiled_pattern, above.
* Return NULL on success, else some error string.
*/
char *
p_compile(regex)
char *regex;
{
int i;
static char buf[1000];
if (free_pattern) {
/* Free old pattern space */
regfree(&compiled_pattern);
free_pattern = 0;
}
if ((i=regcomp(&compiled_pattern, regex, posix_flags | REG_NOSUB)) != 0) {
/* compile failed */
regerror(i, &compiled_pattern, buf, sizeof(buf));
return buf;
}
free_pattern = 1; /* remind us to free the pattern next time. */
return NULL;
}
int
p_compare(str)
char *str;
{
regmatch_t pmatch[1];
return (regexec(&compiled_pattern, str, 1, pmatch, 0) == 0);
}
#else
/* --------- POSIX regex routines not available ----------- */
static int posix_flags = 0;
void
p_regcomp_flags(cflags)
int cflags;
{
return;
}
char *
p_compile(regex)
char *regex;
{
Error(0, 1, "p_compile(): POSIX regular expressions not available.\n");
return NULL;
}
int
p_compare(str)
char *str;
{
Error(0, 1, "p_compare(): POSIX regular expressions not available.\n");
return NULL;
}
#endif
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