(Fcharset_name): Define `byte_offset' in non-UTF-2000 configuration.

[chise/xemacs-chise.git-] / src / mb-utf-8.h

diff --git a/src/mb-utf-8.h b/src/mb-utf-8.h
index bd6323a..63cf457 100644 (file)
--- a/src/mb-utf-8.h
+++ b/src/mb-utf-8.h
@@ -1,4 +1,4 @@
-/* Header for UTF-8 buffer/string representation.
+/* Header for UTF-8 string representation.
    Copyright (C) 1999 Electrotechnical Laboratory, JAPAN.
    Licensed to the Free Software Foundation.
 
@@ -19,11 +19,16 @@ along with XEmacs; see the file COPYING.  If not, write to
 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 Boston, MA 02111-1307, USA.  */
 
-/* Rewritten by MORIOKA Tomohiko <tomo@m17n.org>. */
+/* Author: MORIOKA Tomohiko <tomo@m17n.org>. */
 
 #ifndef _XEMACS_MB_UTF_8_H
 #define _XEMACS_MB_UTF_8_H
 
+#define MULTIBYTE
+
+/* Maximum number of buffer bytes per Emacs character. */
+#define MAX_EMCHAR_LEN 6
+
 /************************************************************************/
 /*                     Operations on individual bytes                   */
 /*                       in a Mule-formatted string                     */
@@ -37,4 +42,35 @@ BUFBYTE_FIRST_BYTE_P(Bufbyte c)
   return (c <= 0x7f) || (0xc0 <= c);
 }
 
+\f
+/************************************************************************/
+/*                        Dealing with characters                       */
+/************************************************************************/
+
+/* Is this character represented by more than one byte in a string? */
+
+#define CHAR_MULTIBYTE_P(c) ((c) >= 0x80)
+
+
+INLINE int REP_BYTES_BY_FIRST_BYTE (int fb);
+INLINE int
+REP_BYTES_BY_FIRST_BYTE (int fb)
+{
+  if ( fb < 0xc0 )
+    return 1;
+  else if ( fb < 0xe0 )
+    return 2;
+  else if ( fb < 0xf0 )
+    return 3;
+  else if ( fb < 0xf8 )
+    return 4;
+  else if ( fb < 0xfc )
+    return 5;
+  else
+    return 6;
+}
+
+
+#include "mb-multibyte.h"
+
 #endif /* _XEMACS_MB_UTF_8_H */