[3320] | 1 | /*
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| 2 | * Replacements for common but usually nonstandard functions that aren't
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| 3 | * supplied by all platforms.
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| 4 | *
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| 5 | * Copyright (C) 2009 by Dan Fandrich <dan@coneharvesters.com>, et. al.
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| 6 | *
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| 7 | * Licensed under GPLv2, see file LICENSE in this source tree.
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| 8 | */
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| 9 | #include "libbb.h"
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| 10 |
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| 11 | #ifndef HAVE_STRCHRNUL
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| 12 | char* FAST_FUNC strchrnul(const char *s, int c)
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| 13 | {
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| 14 | while (*s != '\0' && *s != c)
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| 15 | s++;
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| 16 | return (char*)s;
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| 17 | }
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| 18 | #endif
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| 19 |
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| 20 | #ifndef HAVE_VASPRINTF
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| 21 | int FAST_FUNC vasprintf(char **string_ptr, const char *format, va_list p)
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| 22 | {
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| 23 | int r;
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| 24 | va_list p2;
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| 25 | char buf[128];
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| 26 |
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| 27 | va_copy(p2, p);
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| 28 | r = vsnprintf(buf, 128, format, p);
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| 29 | va_end(p);
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| 30 |
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| 31 | if (r < 128) {
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| 32 | va_end(p2);
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| 33 | *string_ptr = xstrdup(buf);
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| 34 | return r;
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| 35 | }
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| 36 |
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| 37 | *string_ptr = xmalloc(r+1);
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| 38 | r = vsnprintf(*string_ptr, r+1, format, p2);
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| 39 | va_end(p2);
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| 40 |
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| 41 | return r;
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| 42 | }
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| 43 | #endif
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| 44 |
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| 45 | #ifndef HAVE_FDPRINTF
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| 46 | /* dprintf is now actually part of POSIX.1, but was only added in 2008 */
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| 47 | int fdprintf(int fd, const char *format, ...)
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| 48 | {
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| 49 | va_list p;
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| 50 | int r;
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| 51 | char *string_ptr;
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| 52 |
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| 53 | va_start(p, format);
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| 54 | r = vasprintf(&string_ptr, format, p);
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| 55 | va_end(p);
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| 56 | if (r >= 0) {
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| 57 | r = full_write(fd, string_ptr, r);
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| 58 | free(string_ptr);
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| 59 | }
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| 60 | return r;
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| 61 | }
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| 62 | #endif
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| 63 |
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| 64 | #ifndef HAVE_MEMRCHR
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| 65 | /* Copyright (C) 2005 Free Software Foundation, Inc.
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| 66 | * memrchr() is a GNU function that might not be available everywhere.
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| 67 | * It's basically the inverse of memchr() - search backwards in a
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| 68 | * memory block for a particular character.
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| 69 | */
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| 70 | void* FAST_FUNC memrchr(const void *s, int c, size_t n)
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| 71 | {
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| 72 | const char *start = s, *end = s;
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| 73 |
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| 74 | end += n - 1;
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| 75 |
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| 76 | while (end >= start) {
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| 77 | if (*end == (char)c)
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| 78 | return (void *) end;
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| 79 | end--;
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| 80 | }
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| 81 |
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| 82 | return NULL;
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| 83 | }
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| 84 | #endif
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| 85 |
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| 86 | #ifndef HAVE_MKDTEMP
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| 87 | /* This is now actually part of POSIX.1, but was only added in 2008 */
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| 88 | char* FAST_FUNC mkdtemp(char *template)
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| 89 | {
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| 90 | if (mktemp(template) == NULL || mkdir(template, 0700) != 0)
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| 91 | return NULL;
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| 92 | return template;
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| 93 | }
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| 94 | #endif
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| 95 |
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| 96 | #ifndef HAVE_STRCASESTR
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| 97 | /* Copyright (c) 1999, 2000 The ht://Dig Group */
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| 98 | char* FAST_FUNC strcasestr(const char *s, const char *pattern)
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| 99 | {
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| 100 | int length = strlen(pattern);
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| 101 |
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| 102 | while (*s) {
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| 103 | if (strncasecmp(s, pattern, length) == 0)
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| 104 | return (char *)s;
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| 105 | s++;
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| 106 | }
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| 107 | return 0;
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| 108 | }
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| 109 | #endif
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| 110 |
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| 111 | #ifndef HAVE_STRSEP
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| 112 | /* Copyright (C) 2004 Free Software Foundation, Inc. */
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| 113 | char* FAST_FUNC strsep(char **stringp, const char *delim)
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| 114 | {
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| 115 | char *start = *stringp;
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| 116 | char *ptr;
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| 117 |
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| 118 | if (!start)
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| 119 | return NULL;
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| 120 |
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| 121 | if (!*delim)
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| 122 | ptr = start + strlen(start);
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| 123 | else {
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| 124 | ptr = strpbrk(start, delim);
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| 125 | if (!ptr) {
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| 126 | *stringp = NULL;
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| 127 | return start;
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| 128 | }
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| 129 | }
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| 130 |
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| 131 | *ptr = '\0';
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| 132 | *stringp = ptr + 1;
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| 133 |
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| 134 | return start;
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| 135 | }
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| 136 | #endif
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