| 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 | } |