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Annotation of embedaddon/miniupnpc/src/win32_snprintf.h, revision 1.1.1.1

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 */