-/* $NetBSD: regcomp.c,v 1.33 2012/03/13 21:13:43 christos Exp $ */
+/* $NetBSD: regcomp.c,v 1.36 2015/09/12 19:08:47 christos Exp $ */
/*-
* Copyright (c) 1992, 1993, 1994
#if 0
static char sccsid[] = "@(#)regcomp.c 8.5 (Berkeley) 3/20/94";
#else
-__RCSID("$NetBSD: regcomp.c,v 1.33 2012/03/13 21:13:43 christos Exp $");
+__RCSID("$NetBSD: regcomp.c,v 1.36 2015/09/12 19:08:47 christos Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
len = strlen(pattern);
/* do the mallocs early so failure handling is easy */
- g = (struct re_guts *)malloc(sizeof(struct re_guts) +
- (NC-1)*sizeof(cat_t));
+ g = malloc(sizeof(struct re_guts) + (NC - 1) * sizeof(cat_t));
if (g == NULL)
return(REG_ESPACE);
p->ssize = len/(size_t)2*(size_t)3 + (size_t)1; /* ugh */
- p->strip = malloc(p->ssize * sizeof(sop));
+ p->strip = calloc(p->ssize, sizeof(sop));
p->slen = 0;
if (p->strip == NULL) {
free(g);
int ch)
{
cat_t *cap;
+ unsigned char uc = (unsigned char)ch;
_DIAGASSERT(p != NULL);
cap = p->g->categories;
- if ((p->g->cflags®_ICASE) && isalpha((unsigned char) ch)
- && othercase((unsigned char) ch) != (unsigned char) ch)
- bothcases(p, (unsigned char) ch);
+ if ((p->g->cflags & REG_ICASE) && isalpha(uc) && othercase(uc) != uc)
+ bothcases(p, uc);
else {
- EMIT(OCHAR, (sopno)(unsigned char)ch);
- if (cap[ch] == 0) {
+ EMIT(OCHAR, (sopno)uc);
+ if (cap[uc] == 0) {
_DIAGASSERT(__type_fit(unsigned char,
p->g->ncategories + 1));
- cap[ch] = (unsigned char)p->g->ncategories++;
+ cap[uc] = (unsigned char)p->g->ncategories++;
}
}
}
cset *cs;
size_t css;
size_t i;
+ void *old_ptr;
_DIAGASSERT(p != NULL);
nbytes = nc / CHAR_BIT * css;
if (MEMSIZE(p) > MEMLIMIT)
goto oomem;
- if (p->g->sets == NULL)
- p->g->sets = malloc(nc * sizeof(cset));
- else
- p->g->sets = realloc(p->g->sets, nc * sizeof(cset));
- if (p->g->setbits == NULL)
- p->g->setbits = malloc(nbytes);
- else {
- p->g->setbits = realloc(p->g->setbits, nbytes);
- /* xxx this isn't right if setbits is now NULL */
+ if (reallocarr(&p->g->sets, nc, sizeof(cset)))
+ goto oomem;
+ old_ptr = p->g->setbits;
+ if (reallocarr(&p->g->setbits, nc / CHAR_BIT, css)) {
+ free(old_ptr);
+ goto oomem;
+ }
+ if (old_ptr != p->g->setbits) {
for (i = 0; i < no; i++)
p->g->sets[i].ptr = p->g->setbits + css*(i/CHAR_BIT);
}
- if (p->g->sets != NULL && p->g->setbits != NULL)
- (void) memset((char *)p->g->setbits + (nbytes - css),
- 0, css);
- else {
-oomem:
- no = 0;
- SETERROR(REG_ESPACE);
- /* caller's responsibility not to do set ops */
- return NULL;
- }
+ (void) memset((char *)p->g->setbits + (nbytes - css), 0, css);
}
cs = &p->g->sets[no];
cs->multis = NULL;
return(cs);
+
+oomem:
+ SETERROR(REG_ESPACE);
+ /* caller's responsibility not to do set ops */
+ return NULL;
}
/*
== static void enlarge(struct parse *p, sopno size);
*/
static int
-enlarge(
- struct parse *p,
- sopno size)
+enlarge(struct parse *p, sopno size)
{
- sop *sp;
- sopno osize;
-
_DIAGASSERT(p != NULL);
if (p->ssize >= size)
return 1;
- osize = p->ssize;
- p->ssize = size;
- if (MEMSIZE(p) > MEMLIMIT)
- goto oomem;
- sp = realloc(p->strip, p->ssize * sizeof(sop));
- if (sp == NULL) {
-oomem:
- p->ssize = osize;
+ if (MEMSIZE(p) > MEMLIMIT || reallocarr(&p->strip, size, sizeof(sop))) {
SETERROR(REG_ESPACE);
return 0;
}
- p->strip = sp;
+ p->ssize = size;
return 1;
}
_DIAGASSERT(g != NULL);
g->nstates = p->slen;
- g->strip = realloc(p->strip, p->slen * sizeof(sop));
- if (g->strip == NULL) {
- SETERROR(REG_ESPACE);
- g->strip = p->strip;
- }
+ g->strip = p->strip;
+ reallocarr(&g->strip, p->slen, sizeof(sop));
+ /* Ignore error as tries to free memory only. */
}
/*
--- /dev/null
+/* $NetBSD: reallocarr.c,v 1.5 2015/08/20 22:27:49 kamil Exp $ */
+
+/*-
+ * Copyright (c) 2015 Joerg Sonnenberger <joerg@NetBSD.org>.
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if HAVE_NBTOOL_CONFIG_H
+#include "nbtool_config.h"
+#endif
+
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: reallocarr.c,v 1.5 2015/08/20 22:27:49 kamil Exp $");
+
+#include "namespace.h"
+#include <errno.h>
+/* Old POSIX has SIZE_MAX in limits.h */
+#include <limits.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef _LIBC
+#ifdef __weak_alias
+__weak_alias(reallocarr, _reallocarr)
+#endif
+#endif
+
+#define SQRT_SIZE_MAX (((size_t)1) << (sizeof(size_t) * CHAR_BIT / 2))
+
+#if !HAVE_REALLOCARR
+int
+reallocarr(void *ptr, size_t number, size_t size)
+{
+ int saved_errno, result;
+ void *optr;
+ void *nptr;
+
+ saved_errno = errno;
+ memcpy(&optr, ptr, sizeof(ptr));
+ if (number == 0 || size == 0) {
+ free(optr);
+ nptr = NULL;
+ memcpy(ptr, &nptr, sizeof(ptr));
+ errno = saved_errno;
+ return 0;
+ }
+
+ /*
+ * Try to avoid division here.
+ *
+ * It isn't possible to overflow during multiplication if neither
+ * operand uses any of the most significant half of the bits.
+ */
+ if (__predict_false((number|size) >= SQRT_SIZE_MAX &&
+ number > SIZE_MAX / size)) {
+ errno = saved_errno;
+ return EOVERFLOW;
+ }
+
+ nptr = realloc(optr, number * size);
+ if (__predict_false(nptr == NULL)) {
+ result = errno;
+ } else {
+ result = 0;
+ memcpy(ptr, &nptr, sizeof(ptr));
+ }
+ errno = saved_errno;
+ return result;
+}
+#endif
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