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authorDarren Tucker <dtucker@zip.com.au>2003-10-07 17:49:56 +1000
committerDarren Tucker <dtucker@zip.com.au>2003-10-07 17:49:56 +1000
commit2e8c0cc75244b2354fea2cba5f11277fe47deed4 (patch)
tree267c0012483f2314b5b06d911125c0d0e6106a54 /openbsd-compat/strtoul.c
parentdfe6d914b7d2ad845a7fe2e92bdc4ff7c6f44539 (diff)
- (dtucker) [configure.ac openbsd-compat/Makefile.in openbsd-compat/strtoul.c]
Bug #670: add strtoul() to openbsd-compat for platforms lacking it. ok djm@
Diffstat (limited to 'openbsd-compat/strtoul.c')
-rw-r--r--openbsd-compat/strtoul.c112
1 files changed, 112 insertions, 0 deletions
diff --git a/openbsd-compat/strtoul.c b/openbsd-compat/strtoul.c
new file mode 100644
index 00000000..877e6a01
--- /dev/null
+++ b/openbsd-compat/strtoul.c
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 1990 Regents of the University of California.
+ * 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.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#include "includes.h"
+#ifndef HAVE_STRTOUL
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char *rcsid = "$OpenBSD: strtoul.c,v 1.5 2003/06/02 20:18:38 millert Exp $";
+#endif /* LIBC_SCCS and not lint */
+
+#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+
+/*
+ * Convert a string to an unsigned long integer.
+ *
+ * Ignores `locale' stuff. Assumes that the upper and lower case
+ * alphabets and digits are each contiguous.
+ */
+unsigned long
+strtoul(nptr, endptr, base)
+ const char *nptr;
+ char **endptr;
+ register int base;
+{
+ register const char *s;
+ register unsigned long acc, cutoff;
+ register int c;
+ register int neg, any, cutlim;
+
+ /*
+ * See strtol for comments as to the logic used.
+ */
+ s = nptr;
+ do {
+ c = (unsigned char) *s++;
+ } while (isspace(c));
+ if (c == '-') {
+ neg = 1;
+ c = *s++;
+ } else {
+ neg = 0;
+ if (c == '+')
+ c = *s++;
+ }
+ if ((base == 0 || base == 16) &&
+ c == '0' && (*s == 'x' || *s == 'X')) {
+ c = s[1];
+ s += 2;
+ base = 16;
+ }
+ if (base == 0)
+ base = c == '0' ? 8 : 10;
+
+ cutoff = ULONG_MAX / (unsigned long)base;
+ cutlim = ULONG_MAX % (unsigned long)base;
+ for (acc = 0, any = 0;; c = (unsigned char) *s++) {
+ if (isdigit(c))
+ c -= '0';
+ else if (isalpha(c))
+ c -= isupper(c) ? 'A' - 10 : 'a' - 10;
+ else
+ break;
+ if (c >= base)
+ break;
+ if (any < 0)
+ continue;
+ if (acc > cutoff || acc == cutoff && c > cutlim) {
+ any = -1;
+ acc = ULONG_MAX;
+ errno = ERANGE;
+ } else {
+ any = 1;
+ acc *= (unsigned long)base;
+ acc += c;
+ }
+ }
+ if (neg && any > 0)
+ acc = -acc;
+ if (endptr != 0)
+ *endptr = (char *) (any ? s - 1 : nptr);
+ return (acc);
+}
+#endif /* !HAVE_STRTOUL */