int
gmatch(const char *s, const char *p, int isfile)
{
const char *se, *pe;
if (s == NULL || p == NULL)
return 0;
se = s + strlen(s);
pe = p + strlen(p);
/* isfile is false iff no syntax check has been done on
* the pattern. If check fails, just to a strcmp().
*/
if (!isfile && !has_globbing(p, pe)) {
int len = pe - p + 1;
char tbuf[64];
char *t = len <= sizeof(tbuf) ? tbuf :
(char *) alloc(len, ATEMP);
debunk(t, p, len);
return !strcmp(t, s);
}
return do_gmatch((const unsigned char *) s, (const unsigned char *) se,
(const unsigned char *) p, (const unsigned char *) pe);
}
/*
* int gmatch(string, pattern)
* char *string, *pattern;
*
* Match a pattern as in sh(1).
* pattern character are prefixed with MAGIC by expand.
*/
int
gmatchx(const char *s, const char *p, bool isfile)
{
const char *se, *pe;
char *pnew;
int rv;
if (s == NULL || p == NULL)
return (0);
se = s + strlen(s);
pe = p + strlen(p);
/*
* isfile is false iff no syntax check has been done on
* the pattern. If check fails, just to a strcmp().
*/
if (!isfile && !has_globbing(p, pe)) {
size_t len = pe - p + 1;
char tbuf[64];
char *t = len <= sizeof(tbuf) ? tbuf : alloc(len, ATEMP);
debunk(t, p, len);
return (!strcmp(t, s));
}
/*
* since the do_gmatch() engine sucks so much, we must do some
* pattern simplifications
*/
pnew = simplify_gmatch_pattern((const unsigned char *)p);
pe = pnew + strlen(pnew);
rv = do_gmatch((const unsigned char *)s, (const unsigned char *)se,
(const unsigned char *)pnew, (const unsigned char *)pe);
afree(pnew, ATEMP);
return (rv);
}
/* Function must return either 0 or 1 (assumed by code for 0x80|'!') */
static int
do_gmatch(const unsigned char *s, const unsigned char *se,
const unsigned char *p, const unsigned char *pe)
{
int sc, pc;
const unsigned char *prest, *psub, *pnext;
const unsigned char *srest;
if (s == NULL || p == NULL)
return 0;
while (p < pe) {
pc = *p++;
sc = s < se ? *s : '\0';
s++;
if (!ISMAGIC(pc)) {
if (sc != pc)
return 0;
continue;
}
switch (*p++) {
case '[':
if (sc == 0 || (p = cclass(p, sc)) == NULL)
return 0;
break;
case '?':
if (sc == 0)
return 0;
break;
case '*':
if (p == pe)
return 1;
s--;
do {
if (do_gmatch(s, se, p, pe))
return 1;
} while (s++ < se);
return 0;
/*
* [*+?@!](pattern|pattern|..)
*
* Not ifdef'd KSH as this is needed for ${..%..}, etc.
*/
case 0x80|'+': /* matches one or more times */
case 0x80|'*': /* matches zero or more times */
if (!(prest = pat_scan(p, pe, 0)))
return 0;
s--;
/* take care of zero matches */
if (p[-1] == (0x80 | '*') &&
do_gmatch(s, se, prest, pe))
return 1;
for (psub = p; ; psub = pnext) {
pnext = pat_scan(psub, pe, 1);
for (srest = s; srest <= se; srest++) {
if (do_gmatch(s, srest, psub, pnext - 2) &&
(do_gmatch(srest, se, prest, pe) ||
(s != srest && do_gmatch(srest,
se, p - 2, pe))))
return 1;
}
if (pnext == prest)
break;
}
return 0;
case 0x80|'?': /* matches zero or once */
case 0x80|'@': /* matches one of the patterns */
case 0x80|' ': /* simile for @ */
if (!(prest = pat_scan(p, pe, 0)))
return 0;
s--;
/* Take care of zero matches */
if (p[-1] == (0x80 | '?') &&
do_gmatch(s, se, prest, pe))
return 1;
for (psub = p; ; psub = pnext) {
pnext = pat_scan(psub, pe, 1);
srest = prest == pe ? se : s;
for (; srest <= se; srest++) {
if (do_gmatch(s, srest, psub, pnext - 2) &&
do_gmatch(srest, se, prest, pe))
return 1;
}
if (pnext == prest)
break;
}
return 0;
case 0x80|'!': /* matches none of the patterns */
if (!(prest = pat_scan(p, pe, 0)))
return 0;
s--;
for (srest = s; srest <= se; srest++) {
int matched = 0;
for (psub = p; ; psub = pnext) {
pnext = pat_scan(psub, pe, 1);
if (do_gmatch(s, srest, psub,
pnext - 2))
{
matched = 1;
break;
}
if (pnext == prest)
break;
}
if (!matched &&
do_gmatch(srest, se, prest, pe))
return 1;
}
return 0;
default:
if (sc != p[-1])
return 0;
break;
}
}
return s == se;
}
