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