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 #if OS(POSIX)
30 #define HAVE_STRINGS_H 1
31 #endif
32
33 #if !defined(HAVE_STRNSTR)
34 #if OS(MACOSX) || (OS(FREEBSD) && !defined(__GLIBC__))
35 #define HAVE_STRNSTR 1
36 #endif
37 #endif
38
39 #include <stdarg.h>
40 #include <stdio.h>
41 #include <string.h>
42
43 #if HAVE(STRINGS_H)
44 #include <strings.h>
45 #endif
46
47 #if COMPILER(MSVC)
48 // FIXME: why a COMPILER check instead of OS? also, these should be HAVE checks
49
snprintf(char * buffer,size_t count,const char * format,...)50 inline int snprintf(char* buffer, size_t count, const char* format, ...)
51 {
52 int result;
53 va_list args;
54 va_start(args, format);
55 result = _vsnprintf(buffer, count, format, args);
56 va_end(args);
57
58 // In the case where the string entirely filled the buffer, _vsnprintf will not
59 // null-terminate it, but snprintf must.
60 if (count > 0)
61 buffer[count - 1] = '\0';
62
63 return result;
64 }
65
wtf_vsnprintf(char * buffer,size_t count,const char * format,va_list args)66 inline double wtf_vsnprintf(char* buffer, size_t count, const char* format, va_list args)
67 {
68 int result = _vsnprintf(buffer, count, format, args);
69
70 // In the case where the string entirely filled the buffer, _vsnprintf will not
71 // null-terminate it, but vsnprintf must.
72 if (count > 0)
73 buffer[count - 1] = '\0';
74
75 return result;
76 }
77
78 // Work around a difference in Microsoft's implementation of vsnprintf, where
79 // vsnprintf does not null terminate the buffer. WebKit can rely on the null termination.
80 #define vsnprintf(buffer, count, format, args) wtf_vsnprintf(buffer, count, format, args)
81
strncasecmp(const char * s1,const char * s2,size_t len)82 inline int strncasecmp(const char* s1, const char* s2, size_t len)
83 {
84 return _strnicmp(s1, s2, len);
85 }
86
strcasecmp(const char * s1,const char * s2)87 inline int strcasecmp(const char* s1, const char* s2)
88 {
89 return _stricmp(s1, s2);
90 }
91
92 #endif
93
94 #if !HAVE(STRNSTR)
95
strnstr(const char * buffer,const char * target,size_t bufferLength)96 inline char* strnstr(const char* buffer, const char* target, size_t bufferLength)
97 {
98 size_t targetLength = strlen(target);
99 if (targetLength == 0)
100 return const_cast<char*>(buffer);
101 for (const char* start = buffer; *start && start + targetLength <= buffer + bufferLength; start++) {
102 if (*start == *target && strncmp(start + 1, target + 1, targetLength - 1) == 0)
103 return const_cast<char*>(start);
104 }
105 return 0;
106 }
107
108 #endif
109
110 #endif // WTF_StringExtras_h
111