-/* Header for UCS-4 character representation.
- Copyright (C) 1999 Electrotechnical Laboratory, JAPAN.
- Licensed to the Free Software Foundation.
+/* Header for 1-byte character representation.
+ Copyright (C) 1999,2000 MORIOKA Tomohiko
This file is part of XEmacs.
#ifndef _XEMACS_CHAR_1BYTE_H
#define _XEMACS_CHAR_1BYTE_H
-/* ---------------------------- */
-/* (D) For working with Emchars */
-/* ---------------------------- */
-
#define valid_char_p(ch) ((unsigned int) (ch) <= 0xff)
+\f
+/************************************************************************/
+/* Definition of leading bytes */
+/************************************************************************/
+
+typedef unsigned char Charset_ID;
+
+#define MIN_LEADING_BYTE 0x80
+#define LEADING_BYTE_ASCII 0x80
+#define NUM_LEADING_BYTES 1
+
+#define Vcharset_ascii Qnil
+#define Vcharset_control_1 Qnil
+#define Vcharset_latin_iso8859_1 Qnil
+
+\f
+/************************************************************************/
+/* Information about a particular character set */
+/************************************************************************/
+
+#define CHARSETP(cs) 1
+#define CHARSET_BY_LEADING_BYTE(lb) Vcharset_ascii
+#define XCHARSET_LEADING_BYTE(cs) LEADING_BYTE_ASCII
+#define XCHARSET_GRAPHIC(cs) -1
+#define XCHARSET_COLUMNS(cs) 1
+#define XCHARSET_DIMENSION(cs) 1
+
+\f
+/************************************************************************/
+/* Dealing with characters */
+/************************************************************************/
+
+INLINE_HEADER Emchar DECODE_CHAR (Lisp_Object charset, int code_point);
+INLINE_HEADER Emchar
+DECODE_CHAR (Lisp_Object charset, int code_point)
+{
+ return code_point;
+}
+
+INLINE_HEADER int encode_char_1 (Emchar ch, Lisp_Object* charset);
+INLINE_HEADER int
+encode_char_1 (Emchar ch, Lisp_Object* charset)
+{
+ *charset = Vcharset_ascii;
+ return ch;
+}
+
+#define ENCODE_CHAR(ch, charset) encode_char_1 (ch, &(charset))
+
+#define CHAR_CHARSET(ch) Vcharset_ascii
+#define CHAR_LEADING_BYTE(ch) LEADING_BYTE_ASCII
+
+#define BREAKUP_CHAR(ch, charset, byte1, byte2) do { \
+ (charset) = Vcharset_ascii; \
+ (byte1) = (ch); \
+ (byte2) = 0; \
+} while (0)
+
+
+typedef struct Charc
+{
+ Lisp_Object charset;
+ unsigned char code_point;
+} Charc;
+
+INLINE_HEADER Charc CHAR_TO_CHARC (Emchar ch);
+INLINE_HEADER Charc
+CHAR_TO_CHARC (Emchar ch)
+{
+ Charc cc;
+
+ cc.charset = Vcharset_ascii;
+ cc.code_point = ch;
+ return cc;
+}
+
+\f
+/************************************************************************/
+/* Exported functions */
+/************************************************************************/
+
#endif /* _XEMACS_CHAR_1BYTE_H */