source: branches/3.2/mindi-busybox/libbb/platform.c @ 3186

Last change on this file since 3186 was 2725, checked in by bruno, 8 years ago
  • Update mindi-busybox to 1.18.3 to avoid problems with the tar command which is now failing on recent versions with busybox 1.7.3
  • Property svn:eol-style set to native
File size: 2.5 KB
Line 
1/*
2 * Replacements for common but usually nonstandard functions that aren't
3 * supplied by all platforms.
4 *
5 * Copyright (C) 2009 by Dan Fandrich <dan@coneharvesters.com>, et. al.
6 *
7 * Licensed under GPLv2, see file LICENSE in this source tree.
8 */
9#include "libbb.h"
10
11#ifndef HAVE_STRCHRNUL
12char* FAST_FUNC strchrnul(const char *s, int c)
13{
14    while (*s != '\0' && *s != c)
15        s++;
16    return (char*)s;
17}
18#endif
19
20#ifndef HAVE_VASPRINTF
21int FAST_FUNC vasprintf(char **string_ptr, const char *format, va_list p)
22{
23    int r;
24    va_list p2;
25    char buf[128];
26
27    va_copy(p2, p);
28    r = vsnprintf(buf, 128, format, p);
29    va_end(p);
30
31    if (r < 128) {
32        va_end(p2);
33        *string_ptr = xstrdup(buf);
34        return r;
35    }
36
37    *string_ptr = xmalloc(r+1);
38    r = vsnprintf(*string_ptr, r+1, format, p2);
39    va_end(p2);
40
41    return r;
42}
43#endif
44
45#ifndef HAVE_FDPRINTF
46/* dprintf is now actually part of POSIX.1, but was only added in 2008 */
47int fdprintf(int fd, const char *format, ...)
48{
49    va_list p;
50    int r;
51    char *string_ptr;
52
53    va_start(p, format);
54    r = vasprintf(&string_ptr, format, p);
55    va_end(p);
56    if (r >= 0) {
57        r = full_write(fd, string_ptr, r);
58        free(string_ptr);
59    }
60    return r;
61}
62#endif
63
64#ifndef HAVE_MEMRCHR
65/* Copyright (C) 2005 Free Software Foundation, Inc.
66 * memrchr() is a GNU function that might not be available everywhere.
67 * It's basically the inverse of memchr() - search backwards in a
68 * memory block for a particular character.
69 */
70void* FAST_FUNC memrchr(const void *s, int c, size_t n)
71{
72    const char *start = s, *end = s;
73
74    end += n - 1;
75
76    while (end >= start) {
77        if (*end == (char)c)
78            return (void *) end;
79        end--;
80    }
81
82    return NULL;
83}
84#endif
85
86#ifndef HAVE_MKDTEMP
87/* This is now actually part of POSIX.1, but was only added in 2008 */
88char* FAST_FUNC mkdtemp(char *template)
89{
90    if (mktemp(template) == NULL || mkdir(template, 0700) != 0)
91        return NULL;
92    return template;
93}
94#endif
95
96#ifndef HAVE_STRCASESTR
97/* Copyright (c) 1999, 2000 The ht://Dig Group */
98char* FAST_FUNC strcasestr(const char *s, const char *pattern)
99{
100    int length = strlen(pattern);
101
102    while (*s) {
103        if (strncasecmp(s, pattern, length) == 0)
104            return (char *)s;
105        s++;
106    }
107    return 0;
108}
109#endif
110
111#ifndef HAVE_STRSEP
112/* Copyright (C) 2004 Free Software Foundation, Inc. */
113char* FAST_FUNC strsep(char **stringp, const char *delim)
114{
115    char *start = *stringp;
116    char *ptr;
117
118    if (!start)
119        return NULL;
120
121    if (!*delim)
122        ptr = start + strlen(start);
123    else {
124        ptr = strpbrk(start, delim);
125        if (!ptr) {
126            *stringp = NULL;
127            return start;
128        }
129    }
130
131    *ptr = '\0';
132    *stringp = ptr + 1;
133
134    return start;
135}
136#endif
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