X-Git-Url: http://git.chise.org/gitweb/?a=blobdiff_plain;f=src%2Fmb-utf-8.h;h=c895a0608a2f6fb003863049799c8865550cb0d1;hb=bdd33b388156837b59e1b3f92286c503bb80db6c;hp=bd6323aa007aaf6b55c1d0446dde2cda129ca6f9;hpb=0fdc209fda776f7f27f0aa95c0ef369b7bb1c711;p=chise%2Fxemacs-chise.git

diff --git a/src/mb-utf-8.h b/src/mb-utf-8.h
index bd6323a..c895a06 100644
--- 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.
 
@@ -19,22 +19,59 @@ 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                     */
 /************************************************************************/
 
-/* Does this byte represent the first byte of a character? */
+/* Does BYTE represent the first byte of a character? */
 
-INLINE int
-BUFBYTE_FIRST_BYTE_P(Bufbyte c)
+INLINE_HEADER int BUFBYTE_FIRST_BYTE_P(Bufbyte byte);
+INLINE_HEADER int
+BUFBYTE_FIRST_BYTE_P(Bufbyte byte)
 {
-  return (c <= 0x7f) || (0xc0 <= c);
+  return (byte <= 0x7F) || (0xC0 <= byte);
 }
 
+
+/************************************************************************/
+/*                        Dealing with characters                       */
+/************************************************************************/
+
+/* Is this character represented by more than one byte in a string? */
+
+#define CHAR_MULTIBYTE_P(c) ((c) >= 0x80)
+
+
+INLINE_HEADER int REP_BYTES_BY_FIRST_BYTE (Bufbyte fb);
+INLINE_HEADER int
+REP_BYTES_BY_FIRST_BYTE (Bufbyte 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 */