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- /*
- @deftypefn Supplemental char* strdup (const char *@var{s})
- Returns a pointer to a copy of @var{s} in memory obtained from
- @code{malloc}, or @code{NULL} if insufficient memory was available.
- @end deftypefn
- */
- #include <ansidecl.h>
- #include <stddef.h>
- extern size_t strlen (const char*);
- extern PTR malloc (size_t);
- extern PTR memcpy (PTR, const PTR, size_t);
- char *
- strdup(const char *s)
- {
- size_t len = strlen (s) + 1;
- char *result = (char*) malloc (len);
- if (result == (char*) 0)
- return (char*) 0;
- return (char*) memcpy (result, s, len);
- }
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