void outsl()

in lib/io.c [409:482]

• 64 lines of code
• 10 McCabe index (conditional complexity)

void outsl (unsigned long port, const void *src, unsigned long count)
{
	unsigned int l = 0, l2;
	const unsigned char *p;

	p = (const unsigned char *)src;
	
	if (!count)
		return;
	
	switch (((unsigned long)p) & 0x3)
	{
	 case 0x00:			/* Buffer 32-bit aligned */
		while (count--)
		{
			outl(le32_to_cpu(*(unsigned int *)p), port);
			p += 4;
		}
		break;
	
	 case 0x02:			/* Buffer 16-bit aligned */
		--count;
		
		l = *(unsigned short *)p;
		p += 2;
		
		while (count--)
		{
			l2 = *(unsigned int *)p;
			p += 4;
			outl (le32_to_cpu(l << 16 | l2 >> 16), port);
			l = l2;
		}
		l2 = *(unsigned short *)p;
		outl (le32_to_cpu(l << 16 | l2), port);
		break;
	 case 0x01:			/* Buffer 8-bit aligned */
		--count;

		l = *p << 24;
		p++;
		l |= *(unsigned short *)p << 8;
		p += 2;

		while (count--)
		{
			l2 = *(unsigned int *)p;
			p += 4;
			outl (le32_to_cpu(l | l2 >> 24), port);
			l = l2 << 8;
		}
		l2 = *p;
		outl (le32_to_cpu(l | l2), port);
		break;
	 case 0x03:			/* Buffer 8-bit aligned */
		--count;
		
		l = *p << 24;
		p++;

		while (count--)
		{
			l2 = *(unsigned int *)p;
			p += 4;
			outl (le32_to_cpu(l | l2 >> 8), port);
			l = l2 << 24;
		}
		l2 = *(unsigned short *)p << 16;
		p += 2;
		l2 |= *p;
		outl (le32_to_cpu(l | l2), port);
		break;
	}
}