mirror of
https://github.com/gnif/LookingGlass.git
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32 lines
1.2 KiB
C++
32 lines
1.2 KiB
C++
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#include <Windows.h>
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#include <malloc.h>
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#include <strsafe.h>
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/* credit: https://stackoverflow.com/questions/29049686/is-there-a-better-way-to-pass-formatted-output-to-outputdebugstring */
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VOID _DBGPRINT(PCSTR kwszFunction, INT iLineNumber, LPCSTR kszDebugFormatString, ...) \
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{
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INT cbFormatString = 0;
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va_list args;
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PCHAR szDebugString = NULL;
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size_t st_Offset = 0;
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va_start(args, kszDebugFormatString);
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cbFormatString = _scprintf("[%s:%d] ", kwszFunction, iLineNumber) * sizeof(CHAR);
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cbFormatString += _vscprintf(kszDebugFormatString, args) * sizeof(CHAR) + 2;
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/* Depending on the size of the format string, allocate space on the stack or the heap. */
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szDebugString = (PCHAR)_malloca(cbFormatString);
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if (!szDebugString)
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return;
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/* Populate the buffer with the contents of the format string. */
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StringCbPrintfA(szDebugString, cbFormatString, "[%s:%d] ", kwszFunction, iLineNumber);
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StringCbLengthA(szDebugString, cbFormatString, &st_Offset);
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StringCbVPrintfA(&szDebugString[st_Offset / sizeof(CHAR)], cbFormatString - st_Offset, kszDebugFormatString, args);
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OutputDebugStringA(szDebugString);
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_freea(szDebugString);
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va_end(args);
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}
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