1/*
2 * Copyright (C) 2006, 2010 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef WTF_StringExtras_h
27#define WTF_StringExtras_h
28
29#include <stdarg.h>
30#include <stdio.h>
31#include <string.h>
32
33#if HAVE(STRINGS_H)
34#include <strings.h>
35#endif
36
37#if COMPILER(MSVC)
38// FIXME: why a COMPILER check instead of OS? also, these should be HAVE checks
39
40inline int snprintf(char* buffer, size_t count, const char* format, ...)
41{
42    int result;
43    va_list args;
44    va_start(args, format);
45    result = _vsnprintf(buffer, count, format, args);
46    va_end(args);
47
48    // In the case where the string entirely filled the buffer, _vsnprintf will not
49    // null-terminate it, but snprintf must.
50    if (count > 0)
51        buffer[count - 1] = '\0';
52
53    return result;
54}
55
56inline double wtf_vsnprintf(char* buffer, size_t count, const char* format, va_list args)
57{
58    int result = _vsnprintf(buffer, count, format, args);
59
60    // In the case where the string entirely filled the buffer, _vsnprintf will not
61    // null-terminate it, but vsnprintf must.
62    if (count > 0)
63        buffer[count - 1] = '\0';
64
65    return result;
66}
67
68// Work around a difference in Microsoft's implementation of vsnprintf, where
69// vsnprintf does not null terminate the buffer. WebKit can rely on the null termination.
70#define vsnprintf(buffer, count, format, args) wtf_vsnprintf(buffer, count, format, args)
71
72#if OS(WINCE)
73
74inline int strnicmp(const char* string1, const char* string2, size_t count)
75{
76    return _strnicmp(string1, string2, count);
77}
78
79inline int stricmp(const char* string1, const char* string2)
80{
81    return _stricmp(string1, string2);
82}
83
84inline char* strdup(const char* strSource)
85{
86    return _strdup(strSource);
87}
88
89#endif
90
91inline int strncasecmp(const char* s1, const char* s2, size_t len)
92{
93    return _strnicmp(s1, s2, len);
94}
95
96inline int strcasecmp(const char* s1, const char* s2)
97{
98    return _stricmp(s1, s2);
99}
100
101#endif
102
103#if !HAVE(STRNSTR)
104
105inline char* strnstr(const char* buffer, const char* target, size_t bufferLength)
106{
107    size_t targetLength = strlen(target);
108    if (targetLength == 0)
109        return const_cast<char*>(buffer);
110    for (const char* start = buffer; *start && start + targetLength <= buffer + bufferLength; start++) {
111        if (*start == *target && strncmp(start + 1, target + 1, targetLength - 1) == 0)
112            return const_cast<char*>(start);
113    }
114    return 0;
115}
116
117#endif
118
119#if COMPILER(RVCT) && __ARMCC_VERSION < 400000
120
121int strcasecmp(const char* s1, const char* s2);
122int strncasecmp(const char* s1, const char* s2, size_t len);
123
124#endif
125
126#endif // WTF_StringExtras_h
127