71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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* MiniUPnP project
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* http://miniupnp.free.fr/ or https://miniupnp.tuxfamily.org/
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* (c) 2020 Pali Rohár
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* This software is subject to the conditions detailed
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* in the LICENCE file provided within the distribution */
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#ifndef WIN32_SNPRINTF_H
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#define WIN32_SNPRINTF_H
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#ifdef _WIN32
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#include <stdio.h>
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/* snprintf is supported by:
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* - Visual Studio 2015 or new
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* - mingw32 with iso c ext
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* - mingw-w64 with ansi stdio
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* - mingw-w64 6.0.0 or new with ucrt
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* - mingw-w64 8.0.0 or new with iso c ext
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*/
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#if ( \
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(defined(_MSC_VER) && _MSC_VER < 1900) /* Visual Studio older than 2015 */ || \
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(defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR) && defined(__NO_ISOCEXT)) /* mingw32 without iso c ext */ || \
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(defined(__MINGW64_VERSION_MAJOR) && /* mingw-w64 not ... */ !( \
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(defined (__USE_MINGW_ANSI_STDIO) && __USE_MINGW_ANSI_STDIO != 0)) /* ... with ansi stdio */ || \
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(__MINGW64_VERSION_MAJOR >= 6 && defined(_UCRT)) /* ... at least 6.0.0 with ucrt */ || \
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(__MINGW64_VERSION_MAJOR >= 8 && !defined(__NO_ISOCEXT)) /* ... at least 8.0.0 with iso c ext */ || \
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0) || \
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0)
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/* _scprintf is supported by:
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* - Visual Studio 2002 or new
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* - msvcr70.dll or new
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* - msvcrt.dll on Windows XP or new
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*/
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#if ( \
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(defined(_MSC_VER) && _MSC_VER < 1300) /* Visual Studio older than 2002 */ || \
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(defined(__MSVCRT_VERSION__) && __MSVCRT_VERSION__ < 0x700) /* msvcrt older than 7.0 */ || \
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0)
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#define CHECK_SCPRINTF 0
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#define IF_SCPRINTF(expr) 0
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#define ELSE_SCPRINTF(expr) expr
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#else
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#define CHECK_SCPRINTF 1
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#define IF_SCPRINTF(expr) expr
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#define ELSE_SCPRINTF(expr) 0
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#endif
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/* Emulation of snprintf for win32 */
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#define snprintf(buf, size, fmt, ...) ( \
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(((size) != 0 && (buf) != NULL) ? ( /* _snprintf does not work with NULL buffer */ \
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_snprintf((buf), (size), (fmt), __VA_ARGS__), /* _snprintf returns -1 on overflow, so ignore its value */ \
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(((char *)buf)[(size_t)(size)-1] = 0), /* _snprintf does not fill nul byte on overflow */ \
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0) : 0), \
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(CHECK_SCPRINTF ? IF_SCPRINTF( \
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_scprintf((fmt), __VA_ARGS__) /* calculate return value for snprintf via _scprintf */ \
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) : ELSE_SCPRINTF( \
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((size) != 0 && (buf) != NULL) ? \
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strlen((buf)) /* return just length of buffer */ \
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: \
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1 /* no buffer, impossible to calculate, return just non-zero number */ \
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) \
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) \
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)
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#endif
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#endif /* _WIN32 */
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#endif /* WIN32_SNPRINTF_H */
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