Libc-320.tar.gz

[apple/libc.git] / locale / FreeBSD / wcstombs.c

diff --git a/locale/FreeBSD/wcstombs.c b/locale/FreeBSD/wcstombs.c
new file mode 100644 (file)
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--- /dev/null
+++ b/locale/FreeBSD/wcstombs.c
@@ -0,0 +1,91 @@
+/*-
+ * Copyright (c) 1993
+ *     The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Paul Borman at Krystal Technologies.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by the University of
+ *     California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/lib/libc/locale/wcstombs.c,v 1.5 2002/10/27 10:41:21 tjr Exp $");
+
+#include <errno.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <stddef.h>
+#include <rune.h>
+
+size_t
+wcstombs(char * __restrict s, const wchar_t * __restrict pwcs, size_t n)
+{
+       char buf[MB_LEN_MAX];
+       char *e;
+       int cnt, nb;
+
+       if (pwcs == NULL || n > INT_MAX) {
+               errno = EINVAL;
+               return (-1);
+       }
+
+       cnt = 0;
+
+       if (s == NULL) {
+               /* Convert and count only, do not store. */
+               while (*pwcs != L'\0') {
+                       if (sputrune(*pwcs++, buf, MB_LEN_MAX, &e) == 0) {
+                               errno = EILSEQ;
+                               return (-1);
+                       }
+                       cnt += e - buf;
+               }
+               return (cnt);
+       }
+
+       /* Convert, store and count characters. */
+       nb = n;
+       while (nb > 0) {
+               if (*pwcs == L'\0') {
+                       *s = '\0';
+                       break;
+               }
+               if (sputrune(*pwcs++, s, nb, &e) == 0) {
+                       errno = EILSEQ;
+                       return (-1);
+               }
+               if (e == NULL)          /* too long */
+                       return (cnt);
+               cnt += e - s;
+               nb -= e - s;
+               s = e;
+       }
+
+       return (cnt);
+}