Function bread

DevIL/src-IL/src/il_bits.cpp:123–146

hehe, "bread". It reads data into Buffer from the BITFILE, just like fread for FILE.

// hehe, "bread".  It reads data into Buffer from the BITFILE, just like fread for FILE.
ILint bread(void *Buffer, ILuint Size, ILuint Number, BITFILE *BitFile)
{
	// Note that this function is somewhat useless: In binary image
	// formats, there are some pad bits after each scanline. This
	// function does not take that into account, so you must use bseek to
	// skip the calculated value of bits.

	ILuint	BuffPos = 0, Count = Size * Number;

	while (BuffPos < Count) {
		if (BitFile->ByteBitOff < 0 || BitFile->ByteBitOff > 7) {
			BitFile->ByteBitOff = 7;
			if (iread(&BitFile->Buff, 1, 1) != 1)  // Reached eof or error...
				return BuffPos;
		}

		*((ILubyte*)(Buffer) + BuffPos) = (ILubyte)!!(BitFile->Buff & (1 << BitFile->ByteBitOff));

		BuffPos++;
		BitFile->ByteBitOff--;
	}

	return BuffPos;
}


// Reads bits and puts the first bit in the file as the highest in the return value.