3 @deftypefn Supplemental char* strdup (const char *@var{s})
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.
13 #ifdef ANSI_PROTOTYPES
16 #define size_t unsigned long
19 extern size_t strlen PARAMS ((const char*));
20 extern PTR malloc PARAMS ((size_t));
21 extern PTR memcpy PARAMS ((PTR, const PTR, size_t));
27 size_t len = strlen (s) + 1;
28 char *result = (char*) malloc (len);
29 if (result == (char*) 0)
31 return (char*) memcpy (result, s, len);