Libc-320.tar.gz

[apple/libc.git] / string / FreeBSD / wcsxfrm.c

diff --git a/string/FreeBSD/wcsxfrm.c b/string/FreeBSD/wcsxfrm.c
new file mode 100644 (file)
index 0000000..d0282c3
--- /dev/null
+++ b/string/FreeBSD/wcsxfrm.c
@@ -0,0 +1,115 @@
+/*-
+ * Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
+ *             at Electronni Visti IA, Kiev, Ukraine.
+ *                     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 ``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 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>
+#if 0
+__FBSDID("FreeBSD: src/lib/libc/string/strxfrm.c,v 1.15 2002/09/06 11:24:06 tjr Exp ");
+#endif
+__FBSDID("$FreeBSD: src/lib/libc/string/wcsxfrm.c,v 1.1 2002/10/04 03:18:26 tjr Exp $");
+
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#include "collate.h"
+
+static char *__mbsdup(const wchar_t *);
+
+/*
+ * Placeholder wcsxfrm() implementation. See wcscoll.c for a description of
+ * the logic used.
+ */
+size_t
+wcsxfrm(wchar_t * __restrict dest, const wchar_t * __restrict src, size_t len)
+{
+       int prim, sec, l;
+       size_t slen;
+       char *mbsrc, *s, *ss;
+
+       if (*src == L'\0') {
+               if (len != 0)
+                       *dest = L'\0';
+               return (0);
+       }
+
+       if (__collate_load_error || MB_CUR_MAX > 1) {
+               slen = wcslen(src);
+               if (len > 0) {
+                       if (slen < len)
+                               wcscpy(dest, src);
+                       else {
+                               wcsncpy(dest, src, len - 1);
+                               dest[len - 1] = L'\0';
+                       }
+               }
+               return (slen);
+       }
+
+       mbsrc = __mbsdup(src);
+       slen = 0;
+       prim = sec = 0;
+       ss = s = __collate_substitute(mbsrc);
+       while (*s != '\0') {
+               while (*s != '\0' && prim == 0) {
+                       __collate_lookup(s, &l, &prim, &sec);
+                       s += l;
+               }
+               if (prim != 0) {
+                       if (len > 1) {
+                               *dest++ = (wchar_t)prim;
+                               len--;
+                       }
+                       slen++;
+                       prim = 0;
+               }
+       }
+       free(ss);
+       free(mbsrc);
+       if (len != 0)
+               *dest = L'\0';
+
+       return (slen);
+}
+
+static char *
+__mbsdup(const wchar_t *ws)
+{
+       mbstate_t state;
+       const wchar_t *wcp;
+       size_t len;
+       char *mbs;
+
+       memset(&state, 0, sizeof(state));
+       wcp = ws;
+       if ((len = wcsrtombs(NULL, &wcp, 0, &state)) == (size_t)-1)
+               return (NULL);
+       if ((mbs = malloc(len + 1)) == NULL)
+               return (NULL);
+       memset(&state, 0, sizeof(state));
+       wcsrtombs(mbs, &ws, len + 1, &state);
+
+       return (mbs);
+}