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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 
snprintf(char * buffer,size_t count,const char * format,...)40 inline 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 
wtf_vsnprintf(char * buffer,size_t count,const char * format,va_list args)56 inline 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 
strnicmp(const char * string1,const char * string2,size_t count)74 inline int strnicmp(const char* string1, const char* string2, size_t count)
75 {
76     return _strnicmp(string1, string2, count);
77 }
78 
stricmp(const char * string1,const char * string2)79 inline int stricmp(const char* string1, const char* string2)
80 {
81     return _stricmp(string1, string2);
82 }
83 
strdup(const char * strSource)84 inline char* strdup(const char* strSource)
85 {
86     return _strdup(strSource);
87 }
88 
89 #endif
90 
strncasecmp(const char * s1,const char * s2,size_t len)91 inline int strncasecmp(const char* s1, const char* s2, size_t len)
92 {
93     return _strnicmp(s1, s2, len);
94 }
95 
strcasecmp(const char * s1,const char * s2)96 inline int strcasecmp(const char* s1, const char* s2)
97 {
98     return _stricmp(s1, s2);
99 }
100 
101 #endif
102 
103 #if !HAVE(STRNSTR)
104 
strnstr(const char * buffer,const char * target,size_t bufferLength)105 inline 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 
121 int strcasecmp(const char* s1, const char* s2);
122 int strncasecmp(const char* s1, const char* s2, size_t len);
123 
124 #endif
125 
126 #endif // WTF_StringExtras_h
127