view libiberty/strdup.c @ 158:494b0b89df80 default tip

author Shinji KONO <>
date Mon, 25 May 2020 18:13:55 +0900
parents a06113de4d67
line wrap: on
line source


@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);