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authorDJ Delorie <dj@redhat.com>2005-03-25 04:57:08 +0000
committerDJ Delorie <dj@redhat.com>2005-03-25 04:57:08 +0000
commit0fad4bdb8e54f631e012ec382b6e337e7c897502 (patch)
tree09c164d706811e70ecc00f2008a702e5ce291396 /libiberty/strndup.c
parent51e32d644ad69408eacefacd21e015a6c9c519c2 (diff)
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merge from gcc
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diff --git a/libiberty/strndup.c b/libiberty/strndup.c
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+/* Implement the strndup function.
+ Copyright (C) 2005 Free Software Foundation, Inc.
+ Written by Kaveh R. Ghazi <ghazi@caip.rutgers.edu>.
+
+This file is part of the libiberty library.
+Libiberty is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+Libiberty is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with libiberty; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+/*
+
+@deftypefn Extension char* strndup (const char *@var{s}, size_t @var{n})
+
+Returns a pointer to a copy of @var{s} with at most @var{n} characters
+in memory obtained from @code{malloc}, or @code{NULL} if insufficient
+memory was available. The result is always NUL terminated.
+
+@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 *
+strndup(s, n)
+ const char *s;
+ size_t n;
+{
+ char *result;
+ size_t len = strlen (s);
+
+ if (n < len)
+ len = n;
+
+ result = malloc (len + 1);
+ if (!result)
+ return 0;
+
+ result[len] = '\0';
+ return memcpy (result, s, len);
+}