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 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 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 82 inline int strncasecmp(const char* s1, const char* s2, size_t len) 83 { 84 return _strnicmp(s1, s2, len); 85 } 86 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 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
