firmware/libc/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 #include "_ansi.h" /* for _DEFUN */
  38
  39 char *
  40 _DEFUN (strrchr, (s, i),
  41         _CONST char *s _AND
  42         int i)
  43 {
  44   _CONST char *last = NULL;
  45
  46   if (i)
  47     {
  48       while ((s=strchr(s, i)))
  49         {
  50           last = s;
  51           s++;
  52         }
  53     }
  54   else
  55     {
  56       last = strchr(s, i);
  57     }
  58
  59   return (char *) last;
  60 }