/*
* Adds a searching pattern to the internal array.
*/
static void
add_pattern(char *pat, size_t len)
{
/* Do not add further pattern is we already match everything */
if (matchall)
return;
/* Check if we can do a shortcut */
if (len == 0) {
matchall = true;
for (unsigned int i = 0; i < patterns; i++) {
free(pattern[i].pat);
}
pattern = grep_realloc(pattern, sizeof(struct pat));
pattern[0].pat = NULL;
pattern[0].len = 0;
patterns = 1;
return;
}
/* Increase size if necessary */
if (patterns == pattern_sz) {
pattern_sz *= 2;
pattern = grep_realloc(pattern, ++pattern_sz *
sizeof(struct pat));
}
if (len > 0 && pat[len - 1] == '\n')
--len;
/* pat may not be NUL-terminated */
pattern[patterns].pat = grep_malloc(len + 1);
memcpy(pattern[patterns].pat, pat, len);
pattern[patterns].len = len;
pattern[patterns].pat[len] = '\0';
++patterns;
}
static char *
gzfgetln(gzFile *f, size_t *len)
{
size_t n;
int c;
for (n = 0; ; ++n) {
c = gzgetc(f);
if (c == -1) {
const char *gzerrstr;
int gzerr;
if (gzeof(f))
break;
gzerrstr = gzerror(f, &gzerr);
if (gzerr == Z_ERRNO)
err(2, "%s", fname);
else
errx(2, "%s: %s", fname, gzerrstr);
}
if (n >= lnbuflen) {
lnbuflen *= 2;
lnbuf = grep_realloc(lnbuf, ++lnbuflen);
}
if (c == '\n')
break;
lnbuf[n] = c;
}
if (gzeof(f) && n == 0)
return NULL;
*len = n;
return lnbuf;
}
static inline int
grep_lnbufgrow(size_t newlen)
{
if (lnbuflen < newlen) {
lnbuf = grep_realloc(lnbuf, newlen);
lnbuflen = newlen;
}
return (0);
}
/*
* Adds a directory include/exclude pattern to the internal array.
*/
static void
add_dpattern(const char *pat, int mode)
{
/* Increase size if necessary */
if (dpatterns == dpattern_sz) {
dpattern_sz *= 2;
dpattern = grep_realloc(dpattern, ++dpattern_sz *
sizeof(struct epat));
}
dpattern[dpatterns].pat = grep_strdup(pat);
dpattern[dpatterns].mode = mode;
++dpatterns;
}
/*
* Adds a file include/exclude pattern to the internal array.
*/
static void
add_fpattern(const char *pat, int mode)
{
/* Increase size if necessary */
if (fpatterns == fpattern_sz) {
fpattern_sz *= 2;
fpattern = grep_realloc(fpattern, ++fpattern_sz *
sizeof(struct epat));
}
fpattern[fpatterns].pat = grep_strdup(pat);
fpattern[fpatterns].mode = mode;
++fpatterns;
}