newlib/libc/string/strchrnul.c

   1 /*
   2 FUNCTION
   3         <<strchrnul>>---search for character in string
   4
   5 INDEX
   6         strchrnul
   7
   8 SYNOPSIS
   9         #include <string.h>
  10         char * strchrnul(const char *<[string]>, int <[c]>);
  11
  12 DESCRIPTION
  13         This function finds the first occurence of <[c]> (converted to
  14         a char) in the string pointed to by <[string]> (including the
  15         terminating null character).
  16
  17 RETURNS
  18         Returns a pointer to the located character, or a pointer
  19         to the concluding null byte if <[c]> does not occur in <[string]>.
  20
  21 PORTABILITY
  22 <<strchrnul>> is a GNU extension.
  23
  24 <<strchrnul>> requires no supporting OS subroutines.  It uses
  25 strchr() and strlen() from elsewhere in this library.
  26
  27 QUICKREF
  28         strchrnul
  29 */
  30
  31 #include <string.h>
  32
  33 char *
  34 strchrnul (const char *s1,
  35         int i)
  36 {
  37   char *s = strchr(s1, i);
  38
  39   return s ? s : (char *)s1 + strlen(s1);
  40 }