toolchain/gcc/newlib/libc/string/strrchr.c

   1 /*
   2 FUNCTION
   3         <<strrchr>>---reverse search for character in string
   4
   5 INDEX
   6         strrchr
   7
   8 ANSI_SYNOPSIS
   9         #include <string.h>
  10         char * strrchr(const char *<[string]>, int <[c]>);
  11
  12 TRAD_SYNOPSIS
  13         #include <string.h>
  14         char * strrchr(<[string]>, <[c]>);
  15         char *<[string]>;
  16         int *<[c]>;
  17
  18 DESCRIPTION
  19         This function finds the last occurence of <[c]> (converted to
  20         a char) in the string pointed to by <[string]> (including the
  21         terminating null character).
  22
  23 RETURNS
  24         Returns a pointer to the located character, or a null pointer
  25         if <[c]> does not occur in <[string]>.
  26
  27 PORTABILITY
  28 <<strrchr>> is ANSI C.
  29
  30 <<strrchr>> requires no supporting OS subroutines.
  31
  32 QUICKREF
  33         strrchr ansi pure
  34 */
  35
  36 #include <string.h>
  37
  38 char *
  39 _DEFUN (strrchr, (s, i),
  40         _CONST char *s _AND
  41         int i)
  42 {
  43   _CONST char *last = NULL;
  44
  45   if (i)
  46     {
  47       while (s=strchr(s, i))
  48         {
  49           last = s;
  50           s++;
  51         }
  52     }
  53   else
  54     {
  55       last = strchr(s, i);
  56     }
  57
  58   return (char *) last;
  59 }