Python/pystrcmp.c

   1 /* Cross platform case insensitive string compare functions
   2  */
   3
   4 #include "Python.h"
   5
   6 int
   7 PyOS_mystrnicmp(const char *s1, const char *s2, Py_ssize_t size)
   8 {
   9         if (size == 0)
  10                 return 0;
  11         while ((--size > 0) &&
  12                (tolower((unsigned)*s1) == tolower((unsigned)*s2))) {
  13                 if (!*s1++ || !*s2++)
  14                         break;
  15         }
  16         return tolower((unsigned)*s1) - tolower((unsigned)*s2);
  17 }
  18
  19 int
  20 PyOS_mystricmp(const char *s1, const char *s2)
  21 {
  22         while (*s1 && (tolower((unsigned)*s1++) == tolower((unsigned)*s2++))) {
  23                 ;
  24         }
  25         return (tolower((unsigned)*s1) - tolower((unsigned)*s2));
  26 }