1/*
2
3@deftypefn Supplemental char* strdup (const char *@var{s})
4
5Returns 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#ifdef ANSI_PROTOTYPES
14#include <stddef.h>
15#else
16#define size_t unsigned long
17#endif
18
19extern size_t	strlen PARAMS ((const char*));
20extern PTR	malloc PARAMS ((size_t));
21extern PTR	memcpy PARAMS ((PTR, const PTR, size_t));
22
23char *
24strdup(s)
25     const char *s;
26{
27  size_t len = strlen (s) + 1;
28  char *result = (char*) malloc (len);
29  if (result == (char*) 0)
30    return (char*) 0;
31  return (char*) memcpy (result, s, len);
32}
33