Embedded Artistry libc
C Standard Library Support for Bare-metal Systems
strdup.c
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1 /*
2  * Copyright (c) 1988, 1993
3  * The Regents of the University of California. All rights reserved.
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9  * notice, this list of conditions and the following disclaimer.
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29 
30 #if 0
31 #if defined(LIBC_SCCS) && !defined(lint)
32 static char sccsid[] = "@(#)strdup.c 8.1 (Berkeley) 6/4/93";
33 #endif /* LIBC_SCCS and not lint */
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD: src/lib/libc/string/strdup.c,v 1.6 2009/02/03 17:58:20 danger Exp $");
36 #endif
37 
38 #include <stddef.h>
39 #include <stdlib.h>
40 #include <string.h>
41 
42 char* strdup(const char* str)
43 {
44  char* copy = NULL;
45 
46  if(str)
47  {
48  size_t len = strlen(str) + 1;
49 
50  if((copy = malloc(len)) == NULL)
51  {
52  return (NULL);
53  }
54 
55  memcpy(copy, str, len);
56  }
57 
58  return (copy);
59 }
strdup
char * strdup(const char *str)
Duplicate the passed in string str.
Definition: strdup.c:42
strlen
size_t strlen(const char *str)
Returns the length of the given null-terminated byte string.
Definition: strlen.c:77
NULL
#define NULL
Definition: stddef.h:15
malloc
void * malloc(size_t size)
Allocates size bytes of uninitialized storage.
memcpy
void * memcpy(void *__restrict dest, const void *__restrict src, size_t n)
Copies n characters from the object pointed to by src to the object pointed to by dest.