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_fseeki64/_ftelli64 cross platform?

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First post, by superfury

Posted on 
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Rank l33t++
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l33t++

I'm trying to get my 64-bit file I/O in UniPCemu to be cross-platform completely. The reads and writes to files have no complications(since they use the internal number to keep track of the current file position), but _fseeki64 and _ftelli64 seems to have problems with e.g. MinGW builds?

#if defined(VISUALC) || (defined(_fseeki64) && defined(_ftelli64))
	if (!(result = _fseeki64(b->f, pos, direction))) //Direction is constant itself!
	{
		b->position = _ftelli64(b->f); //Use our own position indicator!
	}
#elif defined(fseeki64) && defined(ftelli64)
	if (!(result = fseeki64(b->f, pos, direction))) //Direction is constant itself!
	{
		b->position = ftelli64(b->f); //Use our own position indicator!
	}
#elif defined(_fseeko64) && defined(_ftello64)
	if (!(result = _fseeko64(b->f, pos, direction))) //Direction is constant itself!
	{
		b->position = _ftello64(b->f); //Use our own position indicator!
	}
#elif defined(fseeko64) && defined(ftello64)
	if (!(result = fseeko64(b->f, pos, direction))) //Direction is constant itself!
	{
		b->position = ftello64(b->f); //Use our own position indicator!
	}
#elif defined(_fseeko) && defined(_ftello)
	if (!(result = _fseeko(b->f, pos, direction))) //Direction is constant itself!
	{
		b->position = _ftello(b->f); //Use our own position indicator!
	}
#elif defined(fseeko) && defined(ftello)
	if (!(result = fseeko(b->f, pos, direction))) //Direction is constant itself!
	{
		b->position = ftello(b->f); //Use our own position indicator!
	}
#else
	if (!(result = fseek(b->f, pos, direction))) //Direction is constant itself!
	{
		b->position = ftell(b->f); //Use our own position indicator!
	}
#endif

For some reason, it ends up at the normal fseek and ftell when using MinGW?

Anyone?

Author of the UniPCemu emulator.
UniPCemu Git repository
UniPCemu for Android, Windows, PSP, Vita and Switch on itch.io

Reply 1 of 1, by superfury

Posted on 
User metadata
Rank l33t++
Rank
l33t++

Having revised this code to:

#ifdef IS_WINDOWS
	if (!(result = _fseeki64(b->f, pos, direction))) //Direction is constant itself!
	{
		b->position = _ftelli64(b->f); //Use our own position indicator!
	}
#elif defined(IS_LINUX)
	if (!(result = fseeko(b->f, pos, direction))) //Direction is constant itself!
	{
		b->position = ftello(b->f); //Use our own position indicator!
	}
#else
	if (!(result = fseek(b->f, pos, direction))) //Direction is constant itself!
	{
		b->position = ftell(b->f); //Use our own position indicator!
	}
#endif

This should have fixed any portability issues(with both Android and Windows having improved behaviour on this(Android builds define IS_LINUX in the UniPCemu(common emulator framework) headers)).

Author of the UniPCemu emulator.
UniPCemu Git repository
UniPCemu for Android, Windows, PSP, Vita and Switch on itch.io

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