str_ncmp.c

来自「linux下的BBS」· C语言 代码 · 共 25 行

#include <bbs.h>

int
str_ncmp (s1, s2, num)
char *s1, *s2;
int num;
{
  char c1, c2;
  int diff;

  do {
    c1 = *s1++;
    if (c1 >= 'A' && c1 <= 'Z')
      c1 |= 32;

    c2 = *s2++;
    if (c2 >= 'A' && c2 <= 'Z')
      c2 |= 32;

    if (diff = c1 - c2)
      return (diff);
  } while (--num && c1);
  return 0;
}