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Annotation of embedaddon/miniupnpc/src/win32_snprintf.h, revision 1.1

1.1     ! misho       1: /* vim: tabstop=4 shiftwidth=4 noexpandtab
        !             2:  * MiniUPnP project
        !             3:  * http://miniupnp.free.fr/ or https://miniupnp.tuxfamily.org/
        !             4:  * (c) 2020 Pali Rohár
        !             5:  * This software is subject to the conditions detailed
        !             6:  * in the LICENCE file provided within the distribution */
        !             7: 
        !             8: #ifndef WIN32_SNPRINTF_H
        !             9: #define WIN32_SNPRINTF_H
        !            10: 
        !            11: #ifdef _WIN32
        !            12: 
        !            13: #include <stdio.h>
        !            14: 
        !            15: /* snprintf is supported by:
        !            16:  *  - Visual Studio 2015 or new
        !            17:  *  - mingw32 with iso c ext
        !            18:  *  - mingw-w64 with ansi stdio
        !            19:  *  - mingw-w64 6.0.0 or new with ucrt
        !            20:  *  - mingw-w64 8.0.0 or new with iso c ext
        !            21:  */
        !            22: #if ( \
        !            23:    (defined(_MSC_VER) && _MSC_VER < 1900) /* Visual Studio older than 2015 */ || \
        !            24:    (defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR) && defined(__NO_ISOCEXT)) /* mingw32 without iso c ext */ || \
        !            25:    (defined(__MINGW64_VERSION_MAJOR) && /* mingw-w64 not ... */ !( \
        !            26:        (defined (__USE_MINGW_ANSI_STDIO) && __USE_MINGW_ANSI_STDIO != 0)) /* ... with ansi stdio */ || \
        !            27:        (__MINGW64_VERSION_MAJOR >= 6 && defined(_UCRT)) /* ... at least 6.0.0 with ucrt */ || \
        !            28:        (__MINGW64_VERSION_MAJOR >= 8 && !defined(__NO_ISOCEXT)) /* ... at least 8.0.0 with iso c ext */ || \
        !            29:    0) || \
        !            30: 0)
        !            31: 
        !            32: /* _scprintf is supported by:
        !            33:  *  - Visual Studio 2002 or new
        !            34:  *  - msvcr70.dll or new
        !            35:  *  - msvcrt.dll on Windows XP or new
        !            36:  */
        !            37: #if ( \
        !            38:    (defined(_MSC_VER) && _MSC_VER < 1300) /* Visual Studio older than 2002 */ || \
        !            39:    (defined(__MSVCRT_VERSION__) && __MSVCRT_VERSION__ < 0x700) /* msvcrt older than 7.0 */ || \
        !            40: 0)
        !            41: #define CHECK_SCPRINTF 0
        !            42: #define IF_SCPRINTF(expr) 0
        !            43: #define ELSE_SCPRINTF(expr) expr
        !            44: #else
        !            45: #define CHECK_SCPRINTF 1
        !            46: #define IF_SCPRINTF(expr) expr
        !            47: #define ELSE_SCPRINTF(expr) 0
        !            48: #endif
        !            49: 
        !            50: /* Emulation of snprintf for win32 */
        !            51: #define snprintf(buf, size, fmt, ...) ( \
        !            52:    (((size) != 0 && (buf) != NULL) ? ( /* _snprintf does not work with NULL buffer */ \
        !            53:        _snprintf((buf), (size), (fmt), __VA_ARGS__), /* _snprintf returns -1 on overflow, so ignore its value */ \
        !            54:        (((char *)buf)[(size_t)(size)-1] = 0), /* _snprintf does not fill nul byte on overflow */ \
        !            55:    0) : 0), \
        !            56:    (CHECK_SCPRINTF ? IF_SCPRINTF( \
        !            57:        _scprintf((fmt), __VA_ARGS__) /* calculate return value for snprintf via _scprintf */ \
        !            58:    ) : ELSE_SCPRINTF( \
        !            59:        ((size) != 0 && (buf) != NULL) ? \
        !            60:            strlen((buf)) /* return just length of buffer */ \
        !            61:        : \
        !            62:            1 /* no buffer, impossible to calculate, return just non-zero number */ \
        !            63:        ) \
        !            64:    ) \
        !            65: )
        !            66: 
        !            67: #endif
        !            68: 
        !            69: #endif /* _WIN32 */
        !            70: 
        !            71: #endif /* WIN32_SNPRINTF_H */