void writeToFile()

in hfs/hfslib.c [25:78]
49 lines of code
10 McCabe index (conditional complexity)

void writeToFile(HFSPlusCatalogFile* file, AbstractFile* output, Volume* volume) {
	unsigned char* buffer;
	io_func* io;
	off_t curPosition;
	size_t bytesLeft;
	
	buffer = (unsigned char*) malloc(BUFSIZE);

	if(file->permissions.ownerFlags & UF_COMPRESSED) {
		io = openHFSPlusCompressed(volume, file);
		if(io == NULL) {
			hfs_panic("error opening file");
			free(buffer);
			return;
		}

		curPosition = 0;
		bytesLeft = ((HFSPlusCompressed*) io->data)->decmpfs->size;
	} else {
		io = openRawFile(file->fileID, &file->dataFork, (HFSPlusCatalogRecord*)file, volume);
		if(io == NULL) {
			hfs_panic("error opening file");
			free(buffer);
			return;
		}

		curPosition = 0;
		bytesLeft = file->dataFork.logicalSize;
	}	
	while(bytesLeft > 0) {
		if(bytesLeft > BUFSIZE) {
			if(!READ(io, curPosition, BUFSIZE, buffer)) {
				hfs_panic("error reading");
			}
			if(output->write(output, buffer, BUFSIZE) != BUFSIZE) {
				hfs_panic("error writing");
			}
			curPosition += BUFSIZE;
			bytesLeft -= BUFSIZE;
		} else {
			if(!READ(io, curPosition, bytesLeft, buffer)) {
				hfs_panic("error reading");
			}
			if(output->write(output, buffer, bytesLeft) != bytesLeft) {
				hfs_panic("error writing");
			}
			curPosition += bytesLeft;
			bytesLeft -= bytesLeft;
		}
	}
	CLOSE(io);

	free(buffer);
}