libiberty/strnlen.c

   1 /* Portable version of strnlen.
   2    This function is in the public domain.  */
   3
   4 /*
   5
   6 @deftypefn Supplemental size_t strnlen (const char *@var{s}, size_t @var{maxlen})
   7
   8 Returns the length of @var{s}, as with @code{strlen}, but never looks
   9 past the first @var{maxlen} characters in the string.  If there is no
  10 '\0' character in the first @var{maxlen} characters, returns
  11 @var{maxlen}.
  12
  13 @end deftypefn
  14
  15 */
  16
  17 #include "config.h"
  18
  19 #include <stddef.h>
  20
  21 size_t
  22 strnlen (const char *s, size_t maxlen)
  23 {
  24   size_t i;
  25
  26   for (i = 0; i < maxlen; ++i)
  27     if (s[i] == '\0')
  28       break;
  29   return i;
  30 }