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Reworked _trace function

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Compute the string length, alloc that much chars then process the vsnprintf
This commit is contained in:
Nemirtingas 2019-07-14 23:49:11 +02:00
parent 8751d4e279
commit fb3090bc72
1 changed files with 10 additions and 15 deletions
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25
dll/base.cpp
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@ -27,23 +27,19 @@
// So process it before sending it to debug console
bool _trace(const char* format, ...)
{
constexpr const int len = 1024; // Initial buffer size, hope it is big enought, we will exapnd it if not.
int res;
char *buffer = new char[len];
va_list argptr;
va_start(argptr, format);
res = vsnprintf(buffer, len, format, argptr);
va_list argptr2;
va_copy(argptr2, argptr);
int len;
len = vsnprintf(nullptr, 0, format, argptr);
char *buffer = new char[++len];
vsnprintf(buffer, len, format, argptr2);
va_end(argptr);
if (res >= len)
{
delete[]buffer;
// Now we are sure we have enought free space to contain the string
buffer = new char[++res];
va_start(argptr, format);
vsnprintf(buffer, res, format, argptr);
va_end(argptr);
}
va_end(argptr2);
OutputDebugString(buffer);
delete[]buffer;
@ -53,7 +49,6 @@ bool _trace(const char* format, ...)
#endif // VS_TRACE_DEBUG
#endif // EMU_RELEASE_BUILD
#include <windows.h>
#include <direct.h>