464 lines
13 KiB
C
464 lines
13 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2006, Digium, Inc.
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Compatibility functions for strsep and strtoq missing on Solaris
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*/
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#include "asterisk.h"
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#include <ctype.h>
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#ifndef HAVE_STRSEP
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char *strsep(char **str, const char *delims)
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{
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char *token;
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if (!*str) {
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/* No more tokens */
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return NULL;
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}
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token = *str;
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while (**str != '\0') {
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if (strchr(delims, **str)) {
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**str = '\0';
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(*str)++;
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return token;
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}
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(*str)++;
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}
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/* There is no other token */
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*str = NULL;
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return token;
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}
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#endif
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#ifndef HAVE_SETENV
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int setenv(const char *name, const char *value, int overwrite)
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{
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unsigned char *buf;
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int buflen;
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buflen = strlen(name) + strlen(value) + 2;
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buf = alloca(buflen);
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if (!overwrite && getenv(name))
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return 0;
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snprintf(buf, buflen, "%s=%s", name, value);
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return putenv(buf);
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}
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#endif
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#ifndef HAVE_UNSETENV
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int unsetenv(const char *name)
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{
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return setenv(name, "", 0);
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}
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#endif
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#ifndef HAVE_STRCASESTR
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static char *upper(const char *orig, char *buf, int bufsize)
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{
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int i = 0;
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while (i < (bufsize - 1) && orig[i]) {
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buf[i] = toupper(orig[i]);
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i++;
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}
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buf[i] = '\0';
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return buf;
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}
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char *strcasestr(const char *haystack, const char *needle)
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{
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char *u1, *u2;
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int u1len = strlen(haystack) + 1, u2len = strlen(needle) + 1;
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u1 = alloca(u1len);
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u2 = alloca(u2len);
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if (u1 && u2) {
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char *offset;
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if (u2len > u1len) {
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/* Needle bigger than haystack */
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return NULL;
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}
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offset = strstr(upper(haystack, u1, u1len), upper(needle, u2, u2len));
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if (offset) {
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/* Return the offset into the original string */
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return ((char *)((unsigned long)haystack + (unsigned long)(offset - u1)));
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} else {
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return NULL;
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}
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} else {
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return NULL;
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}
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}
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#endif /* !HAVE_STRCASESTR */
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#ifndef HAVE_STRNLEN
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size_t strnlen(const char *s, size_t n)
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{
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size_t len;
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for (len = 0; len < n; len++)
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if (s[len] == '\0')
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break;
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return len;
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}
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#endif /* !HAVE_STRNLEN */
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#if !defined(HAVE_STRNDUP) && !defined(__AST_DEBUG_MALLOC)
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char *strndup(const char *s, size_t n)
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{
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size_t len = strnlen(s, n);
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char *new = malloc(len + 1);
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if (!new)
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return NULL;
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new[len] = '\0';
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return memcpy(new, s, len);
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}
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#endif /* !defined(HAVE_STRNDUP) && !defined(__AST_DEBUG_MALLOC) */
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#if !defined(HAVE_VASPRINTF) && !defined(__AST_DEBUG_MALLOC)
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int vasprintf(char **strp, const char *fmt, va_list ap)
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{
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int size;
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va_list ap2;
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char s;
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*strp = NULL;
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va_copy(ap2, ap);
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size = vsnprintf(&s, 1, fmt, ap2);
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va_end(ap2);
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*strp = malloc(size + 1);
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if (!*strp)
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return -1;
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vsnprintf(*strp, size + 1, fmt, ap);
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return size;
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}
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#endif /* !defined(HAVE_VASPRINTF) && !defined(__AST_DEBUG_MALLOC) */
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/*
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* Based on Code from bsd-asprintf from OpenSSH
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* Copyright (c) 2004 Darren Tucker.
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*
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* Based originally on asprintf.c from OpenBSD:
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* Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#if !defined(HAVE_ASPRINTF) && !defined(__AST_DEBUG_MALLOC)
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int asprintf(char **str, const char *fmt, ...)
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{
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va_list ap;
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int ret;
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*str = NULL;
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va_start(ap, fmt);
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ret = vasprintf(str, fmt, ap);
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va_end(ap);
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return ret;
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}
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#endif /* !defined(HAVE_ASPRINTF) && !defined(__AST_DEBUG_MALLOC) */
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#ifndef HAVE_STRTOQ
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#ifndef LONG_MIN
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#define LONG_MIN (-9223372036854775807L-1L)
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/* min value of a "long int" */
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#endif
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#ifndef LONG_MAX
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#define LONG_MAX 9223372036854775807L
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/* max value of a "long int" */
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#endif
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/*! \brief
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* Convert a string to a quad integer.
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*
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* \note Ignores `locale' stuff. Assumes that the upper and lower case
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* alphabets and digits are each contiguous.
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*/
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uint64_t strtoq(const char *nptr, char **endptr, int base)
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{
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const char *s;
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uint64_t acc;
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unsigned char c;
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uint64_t qbase, cutoff;
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int neg, any, cutlim;
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/*
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* Skip white space and pick up leading +/- sign if any.
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* If base is 0, allow 0x for hex and 0 for octal, else
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* assume decimal; if base is already 16, allow 0x.
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*/
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s = nptr;
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do {
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c = *s++;
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} while (isspace(c));
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if (c == '-') {
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neg = 1;
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c = *s++;
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} else {
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neg = 0;
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if (c == '+')
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c = *s++;
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}
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if ((base == 0 || base == 16) &&
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c == '\0' && (*s == 'x' || *s == 'X')) {
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c = s[1];
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s += 2;
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base = 16;
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}
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if (base == 0)
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base = c == '\0' ? 8 : 10;
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/*
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* Compute the cutoff value between legal numbers and illegal
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* numbers. That is the largest legal value, divided by the
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* base. An input number that is greater than this value, if
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* followed by a legal input character, is too big. One that
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* is equal to this value may be valid or not; the limit
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* between valid and invalid numbers is then based on the last
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* digit. For instance, if the range for quads is
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* [-9223372036854775808..9223372036854775807] and the input base
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* is 10, cutoff will be set to 922337203685477580 and cutlim to
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* either 7 (neg==0) or 8 (neg==1), meaning that if we have
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* accumulated a value > 922337203685477580, or equal but the
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* next digit is > 7 (or 8), the number is too big, and we will
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* return a range error.
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*
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* Set any if any `digits' consumed; make it negative to indicate
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* overflow.
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*/
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qbase = (unsigned)base;
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cutoff = neg ? (uint64_t)-(LONG_MIN + LONG_MAX) + LONG_MAX : LONG_MAX;
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cutlim = cutoff % qbase;
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cutoff /= qbase;
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for (acc = 0, any = 0;; c = *s++) {
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if (!isascii(c))
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break;
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if (isdigit(c))
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c -= '\0';
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else if (isalpha(c))
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c -= isupper(c) ? 'A' - 10 : 'a' - 10;
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else
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break;
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if (c >= base)
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break;
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if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
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any = -1;
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else {
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any = 1;
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acc *= qbase;
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acc += c;
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}
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}
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if (any < 0) {
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acc = neg ? LONG_MIN : LONG_MAX;
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} else if (neg)
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acc = -acc;
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if (endptr != 0)
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*((const char **)endptr) = any ? s - 1 : nptr;
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return acc;
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}
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#endif /* !HAVE_STRTOQ */
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#ifndef HAVE_GETLOADAVG
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#ifdef linux
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/*! \brief Alternative method of getting load avg on Linux only */
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int getloadavg(double *list, int nelem)
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{
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FILE *LOADAVG;
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double avg[3] = { 0.0, 0.0, 0.0 };
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int i, res = -1;
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if ((LOADAVG = fopen("/proc/loadavg", "r"))) {
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fscanf(LOADAVG, "%lf %lf %lf", &avg[0], &avg[1], &avg[2]);
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res = 0;
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fclose(LOADAVG);
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}
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for (i = 0; (i < nelem) && (i < 3); i++) {
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list[i] = avg[i];
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}
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return res;
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}
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#else /* !linux */
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/*! \brief Return something that won't cancel the call, but still return -1, in case
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* we correct the implementation to check return value */
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int getloadavg(double *list, int nelem)
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{
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int i;
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for (i = 0; i < nelem; i++) {
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list[i] = 0.1;
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}
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return -1;
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}
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#endif /* linux */
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#endif /* !HAVE_GETLOADAVG */
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/*
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* For strlcat()
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*
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* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Appends src to string dst of size siz (unlike strncat, siz is the
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* full size of dst, not space left). At most siz-1 characters
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* will be copied. Always NUL terminates (unless siz <= strlen(dst)).
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* Returns strlen(src) + MIN(siz, strlen(initial dst)).
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* If retval >= siz, truncation occurred.
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*/
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#ifndef HAVE_STRLCAT
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size_t strlcat(char *dst, const char *src, size_t siz)
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{
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register char *d = dst;
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register const char *s = src;
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register size_t n = siz;
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size_t dlen;
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/* Find the end of dst and adjust bytes left but don't go past end */
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while (n-- != 0 && *d != '\0')
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d++;
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dlen = d - dst;
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n = siz - dlen;
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if (n == 0)
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return dlen + strlen(s);
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while (*s != '\0') {
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if (n != 1) {
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*d++ = *s;
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n--;
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}
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s++;
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}
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*d = '\0';
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return dlen + (s - src); /* count does not include NUL */
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}
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#endif /* HAVE_STRLCAT */
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/*
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* For strlcpy()
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*
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* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copy src to string dst of size siz. At most siz-1 characters
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* will be copied. Always NUL terminates (unless siz == 0).
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* Returns strlen(src); if retval >= siz, truncation occurred.
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*/
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#ifndef HAVE_STRLCPY
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size_t strlcpy(char *dst, const char *src, size_t siz)
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{
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register char *d = dst;
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register const char *s = src;
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register size_t n = siz;
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/* Copy as many bytes as will fit */
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if (n != 0 && --n != 0) {
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do {
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if ((*d++ = *s++) == 0)
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break;
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} while (--n != 0);
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}
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/* Not enough room in dst, add NUL and traverse rest of src */
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if (n == 0) {
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if (siz != 0)
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*d = '\0'; /* NUL-terminate dst */
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while (*s++)
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;
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}
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return s - src - 1; /* count does not include NUL */
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}
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#endif /* HAVE_STRLCPY */
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