utils.c

来自「usb drivers based on s3c2410」· C语言 代码 · 共 35 行

void delay(register unsigned long ms) 
{
	volatile register unsigned long i;
	for(; ms; ms--) {
		i = 1000; /*XXX*/
		for(; i; i--)
	  	;
	 }
}

void sio_puts(char *s)
{
  while(*s != 0) {
    sio_putc(*s); 
    s++;
  }
}

int
strncmp(const char *s1, const char *s2, unsigned int n)
{
	unsigned char u1, u2;

	while (n-- > 0)
	{
		u1 = (unsigned char) *s1++;
		u2 = (unsigned char) *s2++;
		if (u1 != u2)
			return u1 - u2;
		if (u1 == '\0')
			return 0;
	}
	return 0;
}