libiberty/strdup.c

   1 /*
   2
   3 @deftypefn Supplemental char* strdup (const char *@var{s})
   4
   5 Returns a pointer to a copy of @var{s} in memory obtained from
   6 @code{malloc}, or @code{NULL} if insufficient memory was available.
   7
   8 @end deftypefn
   9
  10 */
  11
  12 #include <ansidecl.h>
  13 #include <stddef.h>
  14
  15 extern size_t   strlen (const char*);
  16 extern PTR      malloc (size_t);
  17 extern PTR      memcpy (PTR, const PTR, size_t);
  18
  19 char *
  20 strdup(const char *s)
  21 {
  22   size_t len = strlen (s) + 1;
  23   char *result = (char*) malloc (len);
  24   if (result == (char*) 0)
  25     return (char*) 0;
  26   return (char*) memcpy (result, s, len);
  27 }