/*

 * Copyright (C) 2006, 2010 Apple Inc. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

 */

#ifndef WTF_StringExtras_h

#define WTF_StringExtras_h

#include <stdarg.h>

#include <stdio.h>

#include <string.h>

#if HAVE(STRINGS_H) 

#include <strings.h> 

#endif 

#if COMPILER(MSVC)

// FIXME: why a COMPILER check instead of OS? also, these should be HAVE checks

inline int snprintf(char* buffer, size_t count, const char* format, ...) 

{

    int result;

    va_list args;

    va_start(args, format);

    result = _vsnprintf(buffer, count, format, args);

    va_end(args);

    // In the case where the string entirely filled the buffer, _vsnprintf will not

    // null-terminate it, but snprintf must.

    if (count > 0)

        buffer[count - 1] = '\0';

    return result;

}

inline double wtf_vsnprintf(char* buffer, size_t count, const char* format, va_list args)

{

    int result = _vsnprintf(buffer, count, format, args);

    // In the case where the string entirely filled the buffer, _vsnprintf will not

    // null-terminate it, but vsnprintf must.

    if (count > 0)

        buffer[count - 1] = '\0';

    return result;

}

// Work around a difference in Microsoft's implementation of vsnprintf, where 

// vsnprintf does not null terminate the buffer. WebKit can rely on the null termination.

#define vsnprintf(buffer, count, format, args) wtf_vsnprintf(buffer, count, format, args)

#if OS(WINCE)

inline int strnicmp(const char* string1, const char* string2, size_t count)

{

    return _strnicmp(string1, string2, count);

}

inline int stricmp(const char* string1, const char* string2)

{

    return _stricmp(string1, string2);

}

inline char* strdup(const char* strSource)

{

    return _strdup(strSource);

}

#endif

inline int strncasecmp(const char* s1, const char* s2, size_t len)

{

    return _strnicmp(s1, s2, len);

}

inline int strcasecmp(const char* s1, const char* s2)

{

    return _stricmp(s1, s2);

}

#endif

#if COMPILER(MSVC) || COMPILER(RVCT) || OS(WINDOWS) || OS(LINUX) || OS(SOLARIS)

// FIXME: should check HAVE_STRNSTR

inline char* strnstr(const char* buffer, const char* target, size_t bufferLength)

{

    size_t targetLength = strlen(target);

    if (targetLength == 0)

        return const_cast<char*>(buffer);

    for (const char* start = buffer; *start && start + targetLength <= buffer + bufferLength; start++) {

        if (*start == *target && strncmp(start + 1, target + 1, targetLength - 1) == 0)

            return const_cast<char*>(start);

    }

    return 0;

}

#endif

#if COMPILER(RVCT) && __ARMCC_VERSION < 400000

int strcasecmp(const char* s1, const char* s2);

int strncasecmp(const char* s1, const char* s2, size_t len);

#endif

#endif // WTF_StringExtras_h