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Commit | Line | Data |
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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 | } |