Libc-320.tar.gz

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

diff --git a/locale/FreeBSD/wcsrtombs.c b/locale/FreeBSD/wcsrtombs.c
new file mode 100644 (file)
index 0000000..70e0f5f
--- /dev/null
+++ b/locale/FreeBSD/wcsrtombs.c
@@ -0,0 +1,90 @@
+/*-
+ * Copyright (c) 2002 Tim J. Robbins.
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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/wcsrtombs.c,v 1.2 2002/09/06 11:23:45 tjr Exp $");
+
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+
+size_t
+wcsrtombs(char * __restrict dst, const wchar_t ** __restrict src, size_t len,
+    mbstate_t * __restrict ps __unused)
+{
+       char buf[MB_LEN_MAX];
+       const wchar_t *s;
+       size_t nbytes;
+       int nb;
+
+       s = *src;
+       nbytes = 0;
+
+       if (dst == NULL) {
+               for (;;) {
+                       if ((nb = (int)wcrtomb(buf, *s, NULL)) < 0)
+                               /* Invalid character - wcrtomb() sets errno. */
+                               return ((size_t)-1);
+                       else if (*s == L'\0')
+                               return (nbytes + nb - 1);
+                       s++;
+                       nbytes += nb;
+               }
+               /*NOTREACHED*/
+       }
+
+       while (len > 0) {
+               if (len > (size_t)MB_CUR_MAX) {
+                       /* Enough space to translate in-place. */
+                       if ((nb = (int)wcrtomb(dst, *s, NULL)) < 0) {
+                               *src = s;
+                               return ((size_t)-1);
+                       }
+               } else {
+                       /* May not be enough space; use temp. buffer. */
+                       if ((nb = (int)wcrtomb(buf, *s, NULL)) < 0) {
+                               *src = s;
+                               return ((size_t)-1);
+                       }
+                       if (nb > (int)len)
+                               /* MB sequence for character won't fit. */
+                               break;
+                       memcpy(dst, buf, nb);
+               }
+               if (*s == L'\0') {
+                       *src = NULL;
+                       return (nbytes + nb - 1);
+               }
+               s++;
+               dst += nb;
+               len -= nb;
+               nbytes += nb;
+       }
+       *src = s;
+       return (nbytes);
+}