[thirdparty/gcc.git] / libiberty / strdup.c

/*

@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>
#ifdef ANSI_PROTOTYPES
#include <stddef.h>
#else
#define size_t unsigned long
#endif

extern size_t	strlen PARAMS ((const char*));
extern PTR	malloc PARAMS ((size_t));
extern PTR	memcpy PARAMS ((PTR, const PTR, size_t));

char *
strdup(s)
     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);
}
Commit	Line	Data
aaa5f039 DD	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
7f8fa05d	6	@code{malloc}, or @code{NULL} if insufficient memory was available.
aaa5f039 DD	7
	8	@end deftypefn
	9
	10	*/
	11
88702c45 RS	12	#include <ansidecl.h>
	13	#ifdef ANSI_PROTOTYPES
	14	#include <stddef.h>
	15	#else
	16	#define size_t unsigned long
	17	#endif
	18
	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));
	22
6599da04 JM	23	char *
	24	strdup(s)
	25	char *s;
	26	{
88702c45 RS	27	size_t len = strlen (s) + 1;
	28	char result = (char) malloc (len);
	29	if (result == (char*) 0)
	30	return (char*) 0;
	31	return (char*) memcpy (result, s, len);
6599da04	32	}