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 // Copyright (c) 2006, Google 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:

 //

 //     * Redistributions of source code must retain the above copyright

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

 //     * 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.

 //     * Neither the name of Google Inc. nor the names of its

 // contributors may be used to endorse or promote products derived from

 // this software without specific prior written permission.

 //

 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 // "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 THE COPYRIGHT

 // OWNER 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.

 // string_utils-inl.h: Safer string manipulation on Windows, supporting

 // pre-MSVC8 environments.

 #ifndef COMMON_WINDOWS_STRING_UTILS_INL_H__

 #define COMMON_WINDOWS_STRING_UTILS_INL_H__

 #include <stdarg.h>

 #include <wchar.h>

 #include <string>

 // The "ll" printf format size specifier corresponding to |long long| was

 // intrudced in MSVC8.  Earlier versions did not provide this size specifier,

 // but "I64" can be used to print 64-bit types.  Don't use "I64" where "ll"

 // is available, in the event of oddball systems where |long long| is not

 // 64 bits wide.

 #if _MSC_VER >= 1400  // MSVC 2005/8

 #define WIN_STRING_FORMAT_LL "ll"

 #else  // MSC_VER >= 1400

 #define WIN_STRING_FORMAT_LL "I64"

 #endif  // MSC_VER >= 1400

 // A nonconforming version of swprintf, without the length argument, was

 // included with the CRT prior to MSVC8.  Although a conforming version was

 // also available via an overload, it is not reliably chosen.  _snwprintf

 // behaves as a standards-confirming swprintf should, so force the use of

 // _snwprintf when using older CRTs.

 #if _MSC_VER < 1400  // MSVC 2005/8

 #define swprintf _snwprintf

 #else

 // For MSVC8 and newer, swprintf_s is the recommended method. Conveniently,

 // it takes the same argument list as swprintf.

 #define swprintf swprintf_s

 #endif  // MSC_VER < 1400

 namespace google_breakpad {

 using std::string;

 using std::wstring;

 class WindowsStringUtils {

  public:

   // Roughly equivalent to MSVC8's wcscpy_s, except pre-MSVC8, this does

   // not fail if source is longer than destination_size.  The destination

   // buffer is always 0-terminated.

   static void safe_wcscpy(wchar_t *destination, size_t destination_size,

                           const wchar_t *source);

   // Roughly equivalent to MSVC8's wcsncpy_s, except that _TRUNCATE cannot

   // be passed directly, and pre-MSVC8, this will not fail if source or count

   // are longer than destination_size.  The destination buffer is always

   // 0-terminated.

   static void safe_wcsncpy(wchar_t *destination, size_t destination_size,

                            const wchar_t *source, size_t count);

   // Performs multi-byte to wide character conversion on C++ strings, using

   // mbstowcs_s (MSVC8) or mbstowcs (pre-MSVC8).  Returns false on failure,

   // without setting wcs.

   static bool safe_mbstowcs(const string &mbs, wstring *wcs);

   // The inverse of safe_mbstowcs.

   static bool safe_wcstombs(const wstring &wcs, string *mbs);

   // Returns the base name of a file, e.g. strips off the path.

   static wstring GetBaseName(const wstring &filename);

  private:

   // Disallow instantiation and other object-based operations.

   WindowsStringUtils();

   WindowsStringUtils(const WindowsStringUtils&);

   ~WindowsStringUtils();

   void operator=(const WindowsStringUtils&);

 };

 // static

 inline void WindowsStringUtils::safe_wcscpy(wchar_t *destination,

                                             size_t destination_size,

                                             const wchar_t *source) {

 #if _MSC_VER >= 1400  // MSVC 2005/8

   wcscpy_s(destination, destination_size, source);

 #else  // _MSC_VER >= 1400

   // Pre-MSVC 2005/8 doesn't have wcscpy_s.  Simulate it with wcsncpy.

   // wcsncpy doesn't 0-terminate the destination buffer if the source string

   // is longer than size.  Ensure that the destination is 0-terminated.

   wcsncpy(destination, source, destination_size);

   if (destination && destination_size)

     destination[destination_size - 1] = 0;

 #endif  // _MSC_VER >= 1400

 }

 // static

 inline void WindowsStringUtils::safe_wcsncpy(wchar_t *destination,

                                              size_t destination_size,

                                              const wchar_t *source,

                                              size_t count) {

 #if _MSC_VER >= 1400  // MSVC 2005/8

   wcsncpy_s(destination, destination_size, source, count);

 #else  // _MSC_VER >= 1400

   // Pre-MSVC 2005/8 doesn't have wcsncpy_s.  Simulate it with wcsncpy.

   // wcsncpy doesn't 0-terminate the destination buffer if the source string

   // is longer than size.  Ensure that the destination is 0-terminated.

   if (destination_size < count)

     count = destination_size;

   wcsncpy(destination, source, count);

   if (destination && count)

     destination[count - 1] = 0;

 #endif  // _MSC_VER >= 1400

 }

 }  // namespace google_breakpad

 #endif  // COMMON_WINDOWS_STRING_UTILS_INL_H__