39 lines
1.0 KiB
C
39 lines
1.0 KiB
C
/**
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* This file has no copyright assigned and is placed in the Public Domain.
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* This file is part of the mingw-w64 runtime package.
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* No warranty is given; refer to the file DISCLAIMER.PD within this package.
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*/
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#include <stdarg.h>
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#include <stdio.h>
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int __cdecl __ms_snprintf(char* buffer, size_t n, const char *format, ...)
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{
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int retval;
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va_list argptr;
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va_start(argptr, format);
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/* _vsnprintf() does not work with zero length buffer
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* so count number of character by _vscprintf() call */
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if (n == 0 || !buffer)
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{
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retval = _vscprintf(format, argptr);
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va_end(argptr);
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return retval;
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}
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retval = _vsnprintf (buffer, n, format, argptr);
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/* _vsnprintf() returns negative number if buffer is too small
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* so count number of character by _vscprintf() call */
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if (retval < 0)
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retval = _vscprintf(format, argptr);
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/* _vsnprintf() does not fill trailing null byte if there is not place for it */
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if ((size_t)retval >= n)
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buffer[n-1] = '\0';
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va_end(argptr);
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return retval;
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}
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