Backport from mainline:

[pf3gnuchains/gcc-fork.git] / libiberty / strdup.c

diff --git a/libiberty/strdup.c b/libiberty/strdup.c
index 1785b34..78c2093 100644 (file)
--- a/libiberty/strdup.c
+++ b/libiberty/strdup.c
@@ -1,10 +1,27 @@
+/*
+
+@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(s)
-     char *s;
+strdup(const char *s)
 {
-    char *result = (char*)malloc(strlen(s) + 1);
-    if (result == (char*)0)
-       return (char*)0;
-    strcpy(result, s);
-    return result;
+  size_t len = strlen (s) + 1;
+  char *result = (char*) malloc (len);
+  if (result == (char*) 0)
+    return (char*) 0;
+  return (char*) memcpy (result, s, len);
 }