diff options
author | Darren Tucker <dtucker@zip.com.au> | 2003-10-07 17:49:56 +1000 |
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committer | Darren Tucker <dtucker@zip.com.au> | 2003-10-07 17:49:56 +1000 |
commit | 2e8c0cc75244b2354fea2cba5f11277fe47deed4 (patch) | |
tree | 267c0012483f2314b5b06d911125c0d0e6106a54 /openbsd-compat/strtoul.c | |
parent | dfe6d914b7d2ad845a7fe2e92bdc4ff7c6f44539 (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.c | 112 |
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 */ |