strcasecmp.c

mutt-1.5.12 源代码。linux 下邮件接受的工具。

#include <ctype.h>
#include <sys/types.h>

/* UnixWare doesn't have these functions in its standard C library */

int strncasecmp (char *s1, char *s2, size_t n)
{
  register int c1, c2, l = 0;
  
  while (*s1 && *s2 && l < n)
  {
    c1 = tolower ((unsigned char) *s1);
    c2 = tolower ((unsigned char) *s2);
    if (c1 != c2)
      return (c1 - c2);
    s1++;
    s2++;
    l++;
  }
  if (l == n)
    return (int) (0);
  else
    return (int) (*s1 - *s2);
}

int strcasecmp (char *s1, char *s2)
{
  register int c1, c2;
  
  while (*s1 && *s2)
  {
    c1 = tolower ((unsigned char) *s1);
    c2 = tolower ((unsigned char) *s2);
    if (c1 != c2)
      return (c1 - c2);
    s1++;
    s2++;
  }                                                                           
  return (int) (*s1 - *s2);
}