Libc-320.tar.gz

[apple/libc.git] / locale / FreeBSD / utf2.c

diff --git a/locale/FreeBSD/utf2.c b/locale/FreeBSD/utf2.c
new file mode 100644 (file)
index 0000000..22a6ba4
--- /dev/null
+++ b/locale/FreeBSD/utf2.c
@@ -0,0 +1,149 @@
+/*-
+ * 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)utf2.c     8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/lib/libc/locale/utf2.c,v 1.7 2002/03/22 21:52:18 obrien Exp $");
+
+#include <rune.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+rune_t _UTF2_sgetrune(const char *, size_t, char const **);
+int    _UTF2_sputrune(rune_t, char *, size_t, char **);
+
+static int _utf_count[16] = {
+       1, 1, 1, 1, 1, 1, 1, 1,
+       0, 0, 0, 0, 2, 2, 3, 0,
+};
+
+int
+_UTF2_init(rl)
+       _RuneLocale *rl;
+{
+       rl->sgetrune = _UTF2_sgetrune;
+       rl->sputrune = _UTF2_sputrune;
+       _CurrentRuneLocale = rl;
+       __mb_cur_max = 3;
+       return (0);
+}
+
+rune_t
+_UTF2_sgetrune(string, n, result)
+       const char *string;
+       size_t n;
+       char const **result;
+{
+       int c;
+
+       if (n < 1 || (c = _utf_count[(*string >> 4) & 0xf]) > n) {
+               if (result)
+                       *result = string;
+               return (_INVALID_RUNE);
+       }
+       switch (c) {
+       case 1:
+               if (result)
+                       *result = string + 1;
+               return (*string & 0xff);
+       case 2:
+               if ((string[1] & 0xC0) != 0x80)
+                       goto encoding_error;
+               if (result)
+                       *result = string + 2;
+               return (((string[0] & 0x1F) << 6) | (string[1] & 0x3F));
+       case 3:
+               if ((string[1] & 0xC0) != 0x80 || (string[2] & 0xC0) != 0x80)
+                       goto encoding_error;
+               if (result)
+                       *result = string + 3;
+               return (((string[0] & 0x1F) << 12) | ((string[1] & 0x3F) << 6)
+                   | (string[2] & 0x3F));
+       default:
+encoding_error:        if (result)
+                       *result = string + 1;
+               return (_INVALID_RUNE);
+       }
+}
+
+int
+_UTF2_sputrune(c, string, n, result)
+       rune_t c;
+       char *string, **result;
+       size_t n;
+{
+       if (c & 0xF800) {
+               if (n >= 3) {
+                       if (string) {
+                               string[0] = 0xE0 | ((c >> 12) & 0x0F);
+                               string[1] = 0x80 | ((c >> 6) & 0x3F);
+                               string[2] = 0x80 | ((c) & 0x3F);
+                       }
+                       if (result)
+                               *result = string + 3;
+               } else
+                       if (result)
+                               *result = NULL;
+
+               return (3);
+       } else
+               if (c & 0x0780) {
+                       if (n >= 2) {
+                               if (string) {
+                                       string[0] = 0xC0 | ((c >> 6) & 0x1F);
+                                       string[1] = 0x80 | ((c) & 0x3F);
+                               }
+                               if (result)
+                                       *result = string + 2;
+                       } else
+                               if (result)
+                                       *result = NULL;
+                       return (2);
+               } else {
+                       if (n >= 1) {
+                               if (string)
+                                       string[0] = c;
+                               if (result)
+                                       *result = string + 1;
+                       } else
+                               if (result)
+                                       *result = NULL;
+                       return (1);
+               }
+}