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/*

/*

@deftypefn Supplemental char* strdup (const char *@var{s})

@deftypefn Supplemental char* strdup (const char *@var{s})

Returns a pointer to a copy of @var{s} in memory obtained from

Returns a pointer to a copy of @var{s} in memory obtained from

@code{malloc}, or @code{NULL} if insufficient memory was available.

@code{malloc}, or @code{NULL} if insufficient memory was available.

@end deftypefn

@end deftypefn

*/

*/

#include <ansidecl.h>

#include <ansidecl.h>

#include <stddef.h>

#include <stddef.h>

extern size_t   strlen (const char*);

extern size_t   strlen (const char*);

extern PTR      malloc (size_t);

extern PTR      malloc (size_t);

extern PTR      memcpy (PTR, const PTR, size_t);

extern PTR      memcpy (PTR, const PTR, size_t);

char *

char *

strdup(const char *s)

strdup(const char *s)

{

{

  size_t len = strlen (s) + 1;

  size_t len = strlen (s) + 1;

  char *result = (char*) malloc (len);

  char *result = (char*) malloc (len);

  if (result == (char*) 0)

  if (result == (char*) 0)

    return (char*) 0;

    return (char*) 0;

  return (char*) memcpy (result, s, len);

  return (char*) memcpy (result, s, len);

}

}