lib/nstrcmp.c

   1 /* Copyright 1998 by Andi Kleen. Subject to the GPL. */
   2 /* $Id: nstrcmp.c,v 1.2 1998/11/15 20:11:38 freitag Exp $ */
   3 #include <ctype.h>
   4 #include <stdlib.h>
   5 #include "util.h"
   6
   7 /* like strcmp(), but knows about numbers */
   8 int nstrcmp(const char *astr, const char *b)
   9 {
  10     const char *a = astr;
  11
  12     while (*a == *b) {
  13         if (*a == '\0')
  14             return 0;
  15         a++;
  16         b++;
  17     }
  18     if (isdigit(*a)) {
  19         if (!isdigit(*b))
  20             return -1;
  21         while (a > astr) {
  22             a--;
  23             if (!isdigit(*a)) {
  24                 a++;
  25                 break;
  26             }
  27             if (!isdigit(*b))
  28                 return -1;
  29             b--;
  30         }
  31         return atoi(a) > atoi(b) ? 1 : -1;
  32     }
  33     return *a - *b;
  34 }