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https://github.com/topjohnwu/ndk-busybox.git
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110 lines
2.1 KiB
C
110 lines
2.1 KiB
C
/*
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* Replacements for common but usually nonstandard functions that aren't
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* supplied by all platforms.
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*
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* Copyright (C) 2009 by Dan Fandrich <dan@coneharvesters.com>, et. al.
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*
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* Licensed under the GPL version 2, see the file LICENSE in this tarball.
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*/
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#include "libbb.h"
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#ifndef HAVE_STRCHRNUL
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char* FAST_FUNC strchrnul(const char *s, int c)
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{
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while (*s != '\0' && *s != c)
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s++;
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return (char*)s;
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}
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#endif
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#ifndef HAVE_VASPRINTF
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int FAST_FUNC vasprintf(char **string_ptr, const char *format, va_list p)
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{
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int r;
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va_list p2;
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char buf[128];
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va_copy(p2, p);
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r = vsnprintf(buf, 128, format, p);
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va_end(p);
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if (r < 128) {
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va_end(p2);
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*string_ptr = xstrdup(buf);
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return r;
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}
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*string_ptr = xmalloc(r+1);
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r = vsnprintf(*string_ptr, r+1, format, p2);
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va_end(p2);
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return r;
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}
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#endif
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#ifndef HAVE_FDPRINTF
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/* dprintf is now actually part of POSIX.1, but was only added in 2008 */
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int fdprintf(int fd, const char *format, ...)
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{
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va_list p;
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int r;
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char *string_ptr;
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va_start(p, format);
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r = vasprintf(&string_ptr, format, p);
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va_end(p);
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if (r >= 0) {
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r = full_write(fd, string_ptr, r);
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free(string_ptr);
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}
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return r;
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}
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#endif
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#ifndef HAVE_MEMRCHR
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/* Copyright (C) 2005 Free Software Foundation, Inc.
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* memrchr() is a GNU function that might not be available everywhere.
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* It's basically the inverse of memchr() - search backwards in a
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* memory block for a particular character.
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*/
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void* FAST_FUNC memrchr(const void *s, int c, size_t n)
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{
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const char *start = s, *end = s;
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end += n - 1;
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while (end >= start) {
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if (*end == (char)c)
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return (void *) end;
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end--;
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}
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return NULL;
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}
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#endif
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#ifndef HAVE_MKDTEMP
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/* This is now actually part of POSIX.1, but was only added in 2008 */
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char* FAST_FUNC mkdtemp(char *template)
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{
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if (mktemp(template) == NULL || mkdir(template, 0700) != 0)
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return NULL;
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return template;
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}
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#endif
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#ifndef HAVE_STRCASESTR
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/* Copyright (c) 1999, 2000 The ht://Dig Group */
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char* FAST_FUNC strcasestr(const char *s, const char *pattern)
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{
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int length = strlen(pattern);
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while (*s) {
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if (strncasecmp(s, pattern, length) == 0)
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return (char *)s;
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s++;
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}
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return 0;
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}
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#endif
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