This would only be a windows thing and I don't know if this feature is as good / helpful as I am thinking right now, but with the log messages that are passed to OutputDebugString could be redirected to a 4coder buffer, so that we don't have to open / switch to a visual studio, if we only want to view log output while running.
Edited by Zero
on
Reason: Initial post
4coder receives stderr and stdout, so what you could probably do is just this:
1 2 3 4 5 6 7 8 9 10 | void DebugPrint(char *format, ...)
{
static char buffer[4096];
va_list args;
va_start(args, format);
vsnprintf(buffer, sizeof(buffer), format, args);
va_end(args);
printf("%s", buffer);
OutputDebugString(buffer);
}
|
Here's a small C code snippet how to redirect OutputDebugString to stderr of your process:
https://gist.github.com/mmozeiko/bfe0ce5762c496f92d8c775983c41694
Only thing you need to do is to call "ods_capture()" at start of process.
For more information on how OutputDebugString works internally you can read here: http://www.unixwiz.net/techtips/outputdebugstring.html
https://gist.github.com/mmozeiko/bfe0ce5762c496f92d8c775983c41694
Only thing you need to do is to call "ods_capture()" at start of process.
For more information on how OutputDebugString works internally you can read here: http://www.unixwiz.net/techtips/outputdebugstring.html
Edited by Mārtiņš Možeiko
on
Neither of them worked for me, they only work when I set the SUBSYSTEM to Console, and define entry point as 'int main' instead of 'WinMain'. So I ended of doing this:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | typedef void (WindowsLogFn)(const char*);
static WindowsLogFn* windowsLog;
static void windowsLogConsole(const char* msg)
{
HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
DWORD written; // ignored
char* t = (char*)msg;
DWORD len = 0;
while (*t != 0) { t++; len++; }
WriteConsoleA(hOut, msg, len, &written, 0);
}
void log(const char* cstr)
{
windowsLog(cstr);
windowsLog("\n");
}
// entry point
if(IsDebuggerPresent())
{
windowsLog = OutputDebugStringA;
}
else
{
AllocConsole();
windowsLog = windowsLogConsole;
}
// others
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If you are using subsystem windows, then you need to call AllocConsole and reopen stdout/stderr FILE's. Because by default they won't go anywhere. If you are using console subsystem, then there is no need to call AllocConsole - it is already called by OS for you.