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[Emacs-diffs] Changes to emacs/src/charset.h,v
|
From: |
Miles Bader |
|
Subject: |
[Emacs-diffs] Changes to emacs/src/charset.h,v |
|
Date: |
Fri, 01 Feb 2008 16:01:52 +0000 |
CVSROOT: /cvsroot/emacs
Module name: emacs
Changes by: Miles Bader <miles> 08/02/01 16:01:31
Index: src/charset.h
===================================================================
RCS file: /cvsroot/emacs/emacs/src/charset.h,v
retrieving revision 1.89
retrieving revision 1.90
diff -u -b -r1.89 -r1.90
--- src/charset.h 8 Jan 2008 20:44:14 -0000 1.89
+++ src/charset.h 1 Feb 2008 16:00:43 -0000 1.90
@@ -1,4 +1,4 @@
-/* Header for multibyte character handler.
+/* Header for charset handler.
Copyright (C) 2001, 2002, 2003, 2004, 2005,
2006, 2007, 2008 Free Software Foundation, Inc.
Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
@@ -6,6 +6,10 @@
National Institute of Advanced Industrial Science and Technology (AIST)
Registration Number H14PRO021
+ Copyright (C) 2003
+ National Institute of Advanced Industrial Science and Technology (AIST)
+ Registration Number H13PRO009
+
This file is part of GNU Emacs.
GNU Emacs is free software; you can redistribute it and/or modify
@@ -26,866 +30,523 @@
#ifndef EMACS_CHARSET_H
#define EMACS_CHARSET_H
-/* #define BYTE_COMBINING_DEBUG */
-
-/*** GENERAL NOTE on CHARACTER SET (CHARSET) ***
-
- A character set ("charset" hereafter) is a meaningful collection
- (i.e. language, culture, functionality, etc) of characters. Emacs
- handles multiple charsets at once. Each charset corresponds to one
- of the ISO charsets. Emacs identifies a charset by a unique
- identification number, whereas ISO identifies a charset by a triplet
- of DIMENSION, CHARS and FINAL-CHAR. So, hereafter, just saying
- "charset" means an identification number (integer value).
-
- The value range of charsets is 0x00, 0x81..0xFE. There are four
- kinds of charset depending on DIMENSION (1 or 2) and CHARS (94 or
- 96). For instance, a charset of DIMENSION2_CHARS94 contains 94x94
- characters.
-
- Within Emacs Lisp, a charset is treated as a symbol which has a
- property `charset'. The property value is a vector containing
- various information about the charset. For readability of C code,
- we use the following convention for C variable names:
- charset_symbol: Emacs Lisp symbol of a charset
- charset_id: Emacs Lisp integer of an identification number of a charset
- charset: C integer of an identification number of a charset
-
- Each charset (except for ascii) is assigned a base leading-code
- (range 0x80..0x9E). In addition, a charset of greater than 0xA0
- (whose base leading-code is 0x9A..0x9D) is assigned an extended
- leading-code (range 0xA0..0xFE). In this case, each base
- leading-code specifies the allowable range of extended leading-code
- as shown in the table below. A leading-code is used to represent a
- character in Emacs' buffer and string.
-
- We call a charset which has extended leading-code a "private
- charset" because those are mainly for a charset which is not yet
- registered by ISO. On the contrary, we call a charset which does
- not have extended leading-code an "official charset".
-
- ---------------------------------------------------------------------------
- charset dimension base leading-code extended leading-code
- ---------------------------------------------------------------------------
- 0x00 official dim1 -- none -- -- none --
- (ASCII)
- 0x01..0x7F --never used--
- 0x80 official dim1 -- none -- -- none --
- (eight-bit-graphic)
- 0x81..0x8F official dim1 same as charset -- none --
- 0x90..0x99 official dim2 same as charset -- none --
- 0x9A..0x9D --never used--
- 0x9E official dim1 same as charset -- none --
- (eight-bit-control)
- 0x9F --never used--
- 0xA0..0xDF private dim1 0x9A same as charset
- of 1-column width
- 0xE0..0xEF private dim1 0x9B same as charset
- of 2-column width
- 0xF0..0xF4 private dim2 0x9C same as charset
- of 1-column width
- 0xF5..0xFE private dim2 0x9D same as charset
- of 2-column width
- 0xFF --never used--
- ---------------------------------------------------------------------------
-
-*/
-
-/* Definition of special leading-codes. */
-/* Leading-code followed by extended leading-code. */
-#define LEADING_CODE_PRIVATE_11 0x9A /* for private DIMENSION1 of
1-column */
-#define LEADING_CODE_PRIVATE_12 0x9B /* for private DIMENSION1 of
2-column */
-#define LEADING_CODE_PRIVATE_21 0x9C /* for private DIMENSION2 of
1-column */
-#define LEADING_CODE_PRIVATE_22 0x9D /* for private DIMENSION2 of
2-column */
-
-#define LEADING_CODE_8_BIT_CONTROL 0x9E /* for `eight-bit-control' */
-
-/* Extended leading-code. */
-/* Start of each extended leading-codes. */
-#define LEADING_CODE_EXT_11 0xA0 /* follows LEADING_CODE_PRIVATE_11 */
-#define LEADING_CODE_EXT_12 0xE0 /* follows LEADING_CODE_PRIVATE_12 */
-#define LEADING_CODE_EXT_21 0xF0 /* follows LEADING_CODE_PRIVATE_21 */
-#define LEADING_CODE_EXT_22 0xF5 /* follows LEADING_CODE_PRIVATE_22 */
-/* Maximum value of extended leading-codes. */
-#define LEADING_CODE_EXT_MAX 0xFE
-
-/* Definition of minimum/maximum charset of each DIMENSION. */
-#define MIN_CHARSET_OFFICIAL_DIMENSION1 0x80
-#define MAX_CHARSET_OFFICIAL_DIMENSION1 0x8F
-#define MIN_CHARSET_OFFICIAL_DIMENSION2 0x90
-#define MAX_CHARSET_OFFICIAL_DIMENSION2 0x99
-#define MIN_CHARSET_PRIVATE_DIMENSION1 LEADING_CODE_EXT_11
-#define MIN_CHARSET_PRIVATE_DIMENSION2 LEADING_CODE_EXT_21
-
-/* Maximum value of overall charset identification number. */
-#define MAX_CHARSET 0xFE
-
-/* Definition of special charsets. */
-#define CHARSET_ASCII 0 /* 0x00..0x7F */
-#define CHARSET_8_BIT_CONTROL 0x9E /* 0x80..0x9F */
-#define CHARSET_8_BIT_GRAPHIC 0x80 /* 0xA0..0xFF */
-
-extern int charset_latin_iso8859_1; /* ISO8859-1 (Latin-1) */
-extern int charset_jisx0208_1978; /* JISX0208.1978 (Japanese Kanji old set) */
-extern int charset_jisx0208; /* JISX0208.1983 (Japanese Kanji) */
-extern int charset_katakana_jisx0201; /* JISX0201.Kana (Japanese Katakana) */
-extern int charset_latin_jisx0201; /* JISX0201.Roman (Japanese Roman) */
-extern int charset_big5_1; /* Big5 Level 1 (Chinese Traditional) */
-extern int charset_big5_2; /* Big5 Level 2 (Chinese Traditional) */
-extern int charset_mule_unicode_0100_24ff;
-extern int charset_mule_unicode_2500_33ff;
-extern int charset_mule_unicode_e000_ffff;
-
-/* Check if CH is an ASCII character or a base leading-code.
- Nowadays, any byte can be the first byte of a character in a
- multibyte buffer/string. So this macro name is not appropriate. */
-#define CHAR_HEAD_P(ch) ((unsigned char) (ch) < 0xA0)
-
-/*** GENERAL NOTE on CHARACTER REPRESENTATION ***
-
- Firstly, the term "character" or "char" is used for a multilingual
- character (of course, including ASCII characters), not for a byte in
- computer memory. We use the term "code" or "byte" for the latter
- case.
-
- A character is identified by charset and one or two POSITION-CODEs.
- POSITION-CODE is the position of the character in the charset. A
- character of DIMENSION1 charset has one POSITION-CODE: POSITION-CODE-1.
- A character of DIMENSION2 charset has two POSITION-CODE:
- POSITION-CODE-1 and POSITION-CODE-2. The code range of
- POSITION-CODE is 0x20..0x7F.
-
- Emacs has two kinds of representation of a character: multi-byte
- form (for buffers and strings) and single-word form (for character
- objects in Emacs Lisp). The latter is called "character code"
- hereafter. Both representations encode the information of charset
- and POSITION-CODE but in a different way (for instance, the MSB of
- POSITION-CODE is set in multi-byte form).
-
- For details of the multi-byte form, see the section "2. Emacs
- internal format handlers" of `coding.c'.
-
- Emacs uses 19 bits for a character code. The bits are divided into
- 3 fields: FIELD1(5bits):FIELD2(7bits):FIELD3(7bits).
-
- A character code of DIMENSION1 character uses FIELD2 to hold charset
- and FIELD3 to hold POSITION-CODE-1. A character code of DIMENSION2
- character uses FIELD1 to hold charset, FIELD2 and FIELD3 to hold
- POSITION-CODE-1 and POSITION-CODE-2 respectively.
-
- More precisely...
-
- FIELD2 of DIMENSION1 character (except for ascii, eight-bit-control,
- and eight-bit-graphic) is "charset - 0x70". This is to make all
- character codes except for ASCII and 8-bit codes greater than 256.
- So, the range of FIELD2 of DIMENSION1 character is 0, 1, or
- 0x11..0x7F.
-
- FIELD1 of DIMENSION2 character is "charset - 0x8F" for official
- charset and "charset - 0xE0" for private charset. So, the range of
- FIELD1 of DIMENSION2 character is 0x01..0x1E.
-
- -----------------------------------------------------------------------------
- charset FIELD1 (5-bit) FIELD2 (7-bit) FIELD3 (7-bit)
- -----------------------------------------------------------------------------
- ascii 0 0
0x00..0x7F
- eight-bit-control 0 1 0x00..0x1F
- eight-bit-graphic 0 1 0x20..0x7F
- DIMENSION1 0 charset - 0x70 POSITION-CODE-1
- DIMENSION2(o) charset - 0x8F POSITION-CODE-1
POSITION-CODE-2
- DIMENSION2(p) charset - 0xE0 POSITION-CODE-1
POSITION-CODE-2
- -----------------------------------------------------------------------------
- "(o)": official, "(p)": private
- -----------------------------------------------------------------------------
-*/
-
-/* Masks of each field of character code. */
-#define CHAR_FIELD1_MASK (0x1F << 14)
-#define CHAR_FIELD2_MASK (0x7F << 7)
-#define CHAR_FIELD3_MASK 0x7F
-
-/* Macros to access each field of character C. */
-#define CHAR_FIELD1(c) (((c) & CHAR_FIELD1_MASK) >> 14)
-#define CHAR_FIELD2(c) (((c) & CHAR_FIELD2_MASK) >> 7)
-#define CHAR_FIELD3(c) ((c) & CHAR_FIELD3_MASK)
-
-/* Minimum character code of character of each DIMENSION. */
-#define MIN_CHAR_OFFICIAL_DIMENSION1 \
- ((0x81 - 0x70) << 7)
-#define MIN_CHAR_PRIVATE_DIMENSION1 \
- ((MIN_CHARSET_PRIVATE_DIMENSION1 - 0x70) << 7)
-#define MIN_CHAR_OFFICIAL_DIMENSION2 \
- ((MIN_CHARSET_OFFICIAL_DIMENSION2 - 0x8F) << 14)
-#define MIN_CHAR_PRIVATE_DIMENSION2 \
- ((MIN_CHARSET_PRIVATE_DIMENSION2 - 0xE0) << 14)
-/* Maximum character code currently used plus 1. */
-#define MAX_CHAR (0x1F << 14)
-
-/* 1 if C is a single byte character, else 0. */
-#define SINGLE_BYTE_CHAR_P(c) (((unsigned)(c) & 0xFF) == (c))
-
-/* 1 if BYTE is an ASCII character in itself, in multibyte mode. */
-#define ASCII_BYTE_P(byte) ((byte) < 0x80)
-
-/* A char-table containing information on each character set.
-
- Unlike ordinary char-tables, this doesn't contain any nested tables.
- Only the top level elements are used. Each element is a vector of
- the following information:
- CHARSET-ID, BYTES, DIMENSION, CHARS, WIDTH, DIRECTION,
- LEADING-CODE-BASE, LEADING-CODE-EXT,
- ISO-FINAL-CHAR, ISO-GRAPHIC-PLANE,
- REVERSE-CHARSET, SHORT-NAME, LONG-NAME, DESCRIPTION,
- PLIST.
-
- CHARSET-ID (integer) is the identification number of the charset.
-
- BYTES (integer) is the length of the multi-byte form of a character
- in the charset: one of 1, 2, 3, and 4.
-
- DIMENSION (integer) is the number of bytes to represent a character: 1 or 2.
-
- CHARS (integer) is the number of characters in a dimension: 94 or 96.
-
- WIDTH (integer) is the number of columns a character in the charset
- occupies on the screen: one of 0, 1, and 2..
-
- DIRECTION (integer) is the rendering direction of characters in the
- charset when rendering. If 0, render from left to right, else
- render from right to left.
-
- LEADING-CODE-BASE (integer) is the base leading-code for the
- charset.
-
- LEADING-CODE-EXT (integer) is the extended leading-code for the
- charset. All charsets of less than 0xA0 have the value 0.
-
- ISO-FINAL-CHAR (character) is the final character of the
- corresponding ISO 2022 charset. It is -1 for such a character
- that is used only internally (e.g. `eight-bit-control').
-
- ISO-GRAPHIC-PLANE (integer) is the graphic plane to be invoked
- while encoding to variants of ISO 2022 coding system, one of the
- following: 0/graphic-plane-left(GL), 1/graphic-plane-right(GR). It
- is -1 for such a character that is used only internally
- (e.g. `eight-bit-control').
-
- REVERSE-CHARSET (integer) is the charset which differs only in
- LEFT-TO-RIGHT value from the charset. If there's no such a
- charset, the value is -1.
-
- SHORT-NAME (string) is the short name to refer to the charset.
-
- LONG-NAME (string) is the long name to refer to the charset.
-
- DESCRIPTION (string) is the description string of the charset.
-
- PLIST (property list) may contain any type of information a user
- wants to put and get by functions `put-charset-property' and
- `get-charset-property' respectively. */
-extern Lisp_Object Vcharset_table;
-
-/* Macros to access various information of CHARSET in Vcharset_table.
- We provide these macros for efficiency. No range check of CHARSET. */
-
-/* Return entry of CHARSET (C integer) in Vcharset_table. */
-#define CHARSET_TABLE_ENTRY(charset) \
- XCHAR_TABLE (Vcharset_table)->contents[((charset) == CHARSET_ASCII \
- ? 0 : (charset) + 128)]
-
-/* Return information INFO-IDX of CHARSET. */
-#define CHARSET_TABLE_INFO(charset, info_idx) \
- XVECTOR (CHARSET_TABLE_ENTRY (charset))->contents[info_idx]
-
-#define CHARSET_ID_IDX (0)
-#define CHARSET_BYTES_IDX (1)
-#define CHARSET_DIMENSION_IDX (2)
-#define CHARSET_CHARS_IDX (3)
-#define CHARSET_WIDTH_IDX (4)
-#define CHARSET_DIRECTION_IDX (5)
-#define CHARSET_LEADING_CODE_BASE_IDX (6)
-#define CHARSET_LEADING_CODE_EXT_IDX (7)
-#define CHARSET_ISO_FINAL_CHAR_IDX (8)
-#define CHARSET_ISO_GRAPHIC_PLANE_IDX (9)
-#define CHARSET_REVERSE_CHARSET_IDX (10)
-#define CHARSET_SHORT_NAME_IDX (11)
-#define CHARSET_LONG_NAME_IDX (12)
-#define CHARSET_DESCRIPTION_IDX (13)
-#define CHARSET_PLIST_IDX (14)
-/* Size of a vector of each entry of Vcharset_table. */
-#define CHARSET_MAX_IDX (15)
-
-/* And several more macros to be used frequently. */
-#define CHARSET_BYTES(charset) \
- XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_BYTES_IDX))
-#define CHARSET_DIMENSION(charset) \
- XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_DIMENSION_IDX))
-#define CHARSET_CHARS(charset) \
- XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_CHARS_IDX))
-#define CHARSET_WIDTH(charset) \
- XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_WIDTH_IDX))
-#define CHARSET_DIRECTION(charset) \
- XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_DIRECTION_IDX))
-#define CHARSET_LEADING_CODE_BASE(charset) \
- XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_LEADING_CODE_BASE_IDX))
-#define CHARSET_LEADING_CODE_EXT(charset) \
- XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_LEADING_CODE_EXT_IDX))
-#define CHARSET_ISO_FINAL_CHAR(charset) \
- XINT (CHARSET_TABLE_INFO (charset, CHARSET_ISO_FINAL_CHAR_IDX))
-#define CHARSET_ISO_GRAPHIC_PLANE(charset) \
- XINT (CHARSET_TABLE_INFO (charset, CHARSET_ISO_GRAPHIC_PLANE_IDX))
-#define CHARSET_REVERSE_CHARSET(charset) \
- XINT (CHARSET_TABLE_INFO (charset, CHARSET_REVERSE_CHARSET_IDX))
-
-/* Macros to specify direction of a charset. */
-#define CHARSET_DIRECTION_LEFT_TO_RIGHT 0
-#define CHARSET_DIRECTION_RIGHT_TO_LEFT 1
-
-/* A vector of charset symbol indexed by charset-id. This is used
- only for returning charset symbol from C functions. */
-extern Lisp_Object Vcharset_symbol_table;
-
-/* Return symbol of CHARSET. */
-#define CHARSET_SYMBOL(charset) \
- XVECTOR (Vcharset_symbol_table)->contents[charset]
-
-/* 1 if CHARSET is in valid value range, else 0. */
-#define CHARSET_VALID_P(charset) \
- ((charset) == 0 \
- || ((charset) > 0x80 && (charset) <= MAX_CHARSET_OFFICIAL_DIMENSION2) \
- || ((charset) >= MIN_CHARSET_PRIVATE_DIMENSION1 \
- && (charset) <= MAX_CHARSET) \
- || ((charset) == CHARSET_8_BIT_CONTROL) \
- || ((charset) == CHARSET_8_BIT_GRAPHIC))
-
-/* 1 if CHARSET is already defined, else 0. */
-#define CHARSET_DEFINED_P(charset) \
- (((charset) >= 0) && ((charset) <= MAX_CHARSET) \
- && !NILP (CHARSET_TABLE_ENTRY (charset)))
-
-/* Since the information CHARSET-BYTES and CHARSET-WIDTH of
- Vcharset_table can be retrieved only by the first byte of
- multi-byte form (an ASCII code or a base leading-code), we provide
- here tables to be used by macros BYTES_BY_CHAR_HEAD and
- WIDTH_BY_CHAR_HEAD for faster information retrieval. */
-extern int bytes_by_char_head[256];
-extern int width_by_char_head[256];
-
-#define BYTES_BY_CHAR_HEAD(char_head) \
- (ASCII_BYTE_P (char_head) ? 1 : bytes_by_char_head[char_head])
-#define WIDTH_BY_CHAR_HEAD(char_head) \
- (ASCII_BYTE_P (char_head) ? 1 : width_by_char_head[char_head])
-
-/* Charset of the character C. */
-#define CHAR_CHARSET(c)
\
- (SINGLE_BYTE_CHAR_P (c) \
- ? (ASCII_BYTE_P (c) \
- ? CHARSET_ASCII \
- : (c) < 0xA0 ? CHARSET_8_BIT_CONTROL : CHARSET_8_BIT_GRAPHIC) \
- : ((c) < MIN_CHAR_OFFICIAL_DIMENSION2 \
- ? CHAR_FIELD2 (c) + 0x70 \
- : ((c) < MIN_CHAR_PRIVATE_DIMENSION2 \
- ? CHAR_FIELD1 (c) + 0x8F \
- : CHAR_FIELD1 (c) + 0xE0)))
-
-/* Check if two characters C1 and C2 belong to the same charset. */
-#define SAME_CHARSET_P(c1, c2) \
- (c1 < MIN_CHAR_OFFICIAL_DIMENSION2 \
- ? (c1 & CHAR_FIELD2_MASK) == (c2 & CHAR_FIELD2_MASK) \
- : (c1 & CHAR_FIELD1_MASK) == (c2 & CHAR_FIELD1_MASK))
-
-/* Return a character of which charset is CHARSET and position-codes
- are C1 and C2. DIMENSION1 character ignores C2. */
-#define MAKE_CHAR(charset, c1, c2) \
- ((charset) == CHARSET_ASCII \
- ? (c1) & 0x7F \
- : (((charset) == CHARSET_8_BIT_CONTROL \
- || (charset) == CHARSET_8_BIT_GRAPHIC) \
- ? ((c1) & 0x7F) | 0x80 \
- : ((CHARSET_DEFINED_P (charset) \
- ? CHARSET_DIMENSION (charset) == 1 \
- : (charset) < MIN_CHARSET_PRIVATE_DIMENSION2) \
- ? (((charset) - 0x70) << 7) | ((c1) <= 0 ? 0 : ((c1) & 0x7F)) \
- : ((((charset) \
- - ((charset) < MIN_CHARSET_PRIVATE_DIMENSION2 ? 0x8F : 0xE0)) \
- << 14) \
- | ((c2) <= 0 ? 0 : ((c2) & 0x7F)) \
- | ((c1) <= 0 ? 0 : (((c1) & 0x7F) << 7))))))
-
-
-/* If GENERICP is nonzero, return nonzero if C is a valid normal or
- generic character. If GENERICP is zero, return nonzero if C is a
- valid normal character. */
-#define CHAR_VALID_P(c, genericp) \
- ((c) >= 0 \
- && (SINGLE_BYTE_CHAR_P (c) || char_valid_p (c, genericp)))
-
-/* This default value is used when nonascii-translation-table or
- nonascii-insert-offset fail to convert unibyte character to a valid
- multibyte character. This makes a Latin-1 character. */
+/* Index to arguments of Fdefine_charset_internal. */
-#define DEFAULT_NONASCII_INSERT_OFFSET 0x800
+enum define_charset_arg_index
+ {
+ charset_arg_name,
+ charset_arg_dimension,
+ charset_arg_code_space,
+ charset_arg_min_code,
+ charset_arg_max_code,
+ charset_arg_iso_final,
+ charset_arg_iso_revision,
+ charset_arg_emacs_mule_id,
+ charset_arg_ascii_compatible_p,
+ charset_arg_supplementary_p,
+ charset_arg_invalid_code,
+ charset_arg_code_offset,
+ charset_arg_map,
+ charset_arg_subset,
+ charset_arg_superset,
+ charset_arg_unify_map,
+ charset_arg_plist,
+ charset_arg_max
+ };
+
+
+/* Indices to charset attributes vector. */
+
+enum charset_attr_index
+ {
+ /* ID number of the charset. */
+ charset_id,
+
+ /* Name of the charset (symbol). */
+ charset_name,
+
+ /* Property list of the charset. */
+ charset_plist,
+
+ /* If the method of the charset is `MAP_DEFERRED', the value is a
+ mapping vector or a file name that contains mapping vector.
+ Otherwise, nil. */
+ charset_map,
+
+ /* If the method of the charset is `MAP', the value is a vector
+ that maps code points of the charset to characters. The vector
+ is indexed by a character index. A character index is
+ calculated from a code point and the code-space table of the
+ charset. */
+ charset_decoder,
+
+ /* If the method of the charset is `MAP', the value is a
+ char-table that maps characters of the charset to code
+ points. */
+ charset_encoder,
+
+ /* If the method of the charset is `SUBSET', the value is a vector
+ that has this form:
+
+ [ CHARSET-ID MIN-CODE MAX-CODE OFFSET ]
+
+ CHARSET-ID is an ID number of a parent charset. MIN-CODE and
+ MAX-CODE specify the range of characters inherited from the
+ parent. OFFSET is an integer value to add to a code point of
+ the parent charset to get the corresponding code point of this
+ charset. */
+ charset_subset,
+
+ /* If the method of the charset is `SUPERSET', the value is a list
+ whose elements have this form:
+
+ (CHARSET-ID . OFFSET)
+
+ CHARSET-IDs are ID numbers of parent charsets. OFFSET is an
+ integer value to add to a code point of the parent charset to
+ get the corresponding code point of this charset. */
+ charset_superset,
+
+ /* The value is a mapping vector or a file name that contains the
+ mapping. This defines how characters in the charset should be
+ unified with Unicode. The value of the member
+ `charset_deunifier' is created from this information. */
+ charset_unify_map,
+
+ /* If characters in the charset must be unified Unicode, the value
+ is a char table that maps a unified Unicode character code to
+ the non-unified character code in the charset. */
+ charset_deunifier,
+
+ /* The length of the charset attribute vector. */
+ charset_attr_max
+ };
+
+/* Methods for converting code points and characters of charsets. */
+
+enum charset_method
+ {
+ /* For a charset of this method, a character code is calculated
+ from a character index (which is calculated from a code point)
+ simply by adding an offset value. */
+ CHARSET_METHOD_OFFSET,
+
+ /* For a charset of this method, a decoder vector and an encoder
+ char-table is used for code point <-> character code
+ conversion. */
+ CHARSET_METHOD_MAP,
+
+ /* Same as above but decoder and encoder are loaded from a file on
+ demand. Once loaded, the method is changed to
+ CHARSET_METHOD_MAP. */
+ CHARSET_METHOD_MAP_DEFERRED,
+
+ /* A charset of this method is a subset of another charset. */
+ CHARSET_METHOD_SUBSET,
+
+ /* A charset of this method is a superset of other charsets. */
+ CHARSET_METHOD_SUPERSET
+ };
+
+struct charset
+{
+ /* Index to charset_table. */
+ int id;
+
+ /* Index to Vcharset_hash_table. */
+ int hash_index;
+
+ /* Dimension of the charset: 1, 2, 3, or 4. */
+ int dimension;
+
+ /* Byte code range of each dimension. <code_space>[4N] is a mininum
+ byte code of the (N+1)th dimension, <code_space>[4N+1] is a
+ maximum byte code of the (N+1)th dimension, <code_space>[4N+2] is
+ (<code_space>[4N+1] - <code_space>[4N] + 1), <code_space>[4N+3]
+ is a number of characters containd in the first to (N+1)th
+ dismesions. We get `char-index' of a `code-point' from this
+ information. */
+ int code_space[16];
+
+ /* If B is a byte of Nth dimension of a code-point, the (N-1)th bit
+ of code_space_mask[B] is set. This array is used to quickly
+ check if a code-point is in a valid range. */
+ unsigned char *code_space_mask;
+
+ /* 1 if there's no gap in code-points. */
+ int code_linear_p;
+
+ /* If the charset is treated as 94-chars in ISO-2022, the value is 0.
+ If the charset is treated as 96-chars in ISO-2022, the value is 1. */
+ int iso_chars_96;
+
+ /* ISO final byte of the charset: 48..127. It may be -1 if the
+ charset doesn't conform to ISO-2022. */
+ int iso_final;
+
+ /* ISO revision number of the charset. */
+ int iso_revision;
+
+ /* If the charset is identical to what supported by Emacs 21 and the
+ priors, the identification number of the charset used in those
+ version. Otherwise, -1. */
+ int emacs_mule_id;
+
+ /* Nonzero if the charset is compatible with ASCII. */
+ int ascii_compatible_p;
+
+ /* Nonzero if the charset is supplementary. */
+ int supplementary_p;
+
+ /* Nonzero if all the code points are representable by Lisp_Int. */
+ int compact_codes_p;
+
+ /* The method for encoding/decoding characters of the charset. */
+ enum charset_method method;
+
+ /* Mininum and Maximum code points of the charset. */
+ unsigned min_code, max_code;
+
+ /* Offset value used by macros CODE_POINT_TO_INDEX and
+ INDEX_TO_CODE_POINT. . */
+ unsigned char_index_offset;
+
+ /* Mininum and Maximum character codes of the charset. If the
+ charset is compatible with ASCII, min_char is a minimum non-ASCII
+ character of the charset. If the method of charset is
+ CHARSET_METHOD_OFFSET, even if the charset is unified, min_char
+ and max_char doesn't change. */
+ int min_char, max_char;
+
+ /* The code returned by ENCODE_CHAR if a character is not encodable
+ by the charset. */
+ unsigned invalid_code;
+
+ /* If the method of the charset is CHARSET_METHOD_MAP, this is a
+ table of bits used to quickly and roughly guess if a character
+ belongs to the charset.
+
+ The first 64 elements are 512 bits for characters less than
+ 0x10000. Each bit corresponds to 128-character block. The last
+ 126 elements are 1008 bits for the greater characters
+ (0x10000..0x3FFFFF). Each bit corresponds to 4096-character
+ block.
+
+ If a bit is 1, at least one character in the corresponding block is
+ in this charset. */
+ unsigned char fast_map[190];
+
+ /* Offset value to calculate a character code from code-point, and
+ visa versa. */
+ int code_offset;
+
+ int unified_p;
+};
+
+/* Hash table of charset symbols vs. the correponding attribute
+ vectors. */
+extern Lisp_Object Vcharset_hash_table;
+
+/* Table of struct charset. */
+extern struct charset *charset_table;
+
+#define CHARSET_FROM_ID(id) (charset_table + (id))
+
+extern Lisp_Object Vcharset_ordered_list;
+
+/* Incremented everytime we change the priority of charsets. */
+extern unsigned short charset_ordered_list_tick;
+
+extern Lisp_Object Vcharset_list;
+extern Lisp_Object Viso_2022_charset_list;
+extern Lisp_Object Vemacs_mule_charset_list;
+
+extern struct charset *emacs_mule_charset[256];
+
+
+/* Macros to access information about charset. */
+
+/* Return the attribute vector of charset whose symbol is SYMBOL. */
+#define CHARSET_SYMBOL_ATTRIBUTES(symbol) \
+ Fgethash ((symbol), Vcharset_hash_table, Qnil)
+
+#define CHARSET_ATTR_ID(attrs) AREF ((attrs), charset_id)
+#define CHARSET_ATTR_NAME(attrs) AREF ((attrs), charset_name)
+#define CHARSET_ATTR_PLIST(attrs) AREF ((attrs), charset_plist)
+#define CHARSET_ATTR_MAP(attrs) AREF ((attrs), charset_map)
+#define CHARSET_ATTR_DECODER(attrs) AREF ((attrs), charset_decoder)
+#define CHARSET_ATTR_ENCODER(attrs) AREF ((attrs), charset_encoder)
+#define CHARSET_ATTR_SUBSET(attrs) AREF ((attrs), charset_subset)
+#define CHARSET_ATTR_SUPERSET(attrs) AREF ((attrs), charset_superset)
+#define CHARSET_ATTR_UNIFY_MAP(attrs) AREF ((attrs), charset_unify_map)
+#define CHARSET_ATTR_DEUNIFIER(attrs) AREF ((attrs), charset_deunifier)
+
+#define CHARSET_SYMBOL_ID(symbol) \
+ CHARSET_ATTR_ID (CHARSET_SYMBOL_ATTRIBUTES (symbol))
+
+/* Return an index to Vcharset_hash_table of the charset whose symbol
+ is SYMBOL. */
+#define CHARSET_SYMBOL_HASH_INDEX(symbol) \
+ hash_lookup (XHASH_TABLE (Vcharset_hash_table), symbol, NULL)
+
+/* Return the attribute vector of CHARSET. */
+#define CHARSET_ATTRIBUTES(charset) \
+ (HASH_VALUE (XHASH_TABLE (Vcharset_hash_table), (charset)->hash_index))
+
+#define CHARSET_ID(charset) ((charset)->id)
+#define CHARSET_HASH_INDEX(charset) ((charset)->hash_index)
+#define CHARSET_DIMENSION(charset) ((charset)->dimension)
+#define CHARSET_CODE_SPACE(charset) ((charset)->code_space)
+#define CHARSET_CODE_LINEAR_P(charset) ((charset)->code_linear_p)
+#define CHARSET_ISO_CHARS_96(charset) ((charset)->iso_chars_96)
+#define CHARSET_ISO_FINAL(charset) ((charset)->iso_final)
+#define CHARSET_ISO_PLANE(charset) ((charset)->iso_plane)
+#define CHARSET_ISO_REVISION(charset) ((charset)->iso_revision)
+#define CHARSET_EMACS_MULE_ID(charset) ((charset)->emacs_mule_id)
+#define CHARSET_ASCII_COMPATIBLE_P(charset) ((charset)->ascii_compatible_p)
+#define CHARSET_COMPACT_CODES_P(charset) ((charset)->compact_codes_p)
+#define CHARSET_METHOD(charset) ((charset)->method)
+#define CHARSET_MIN_CODE(charset) ((charset)->min_code)
+#define CHARSET_MAX_CODE(charset) ((charset)->max_code)
+#define CHARSET_INVALID_CODE(charset) ((charset)->invalid_code)
+#define CHARSET_MIN_CHAR(charset) ((charset)->min_char)
+#define CHARSET_MAX_CHAR(charset) ((charset)->max_char)
+#define CHARSET_CODE_OFFSET(charset) ((charset)->code_offset)
+#define CHARSET_UNIFIED_P(charset) ((charset)->unified_p)
+
+#define CHARSET_NAME(charset) \
+ (CHARSET_ATTR_NAME (CHARSET_ATTRIBUTES (charset)))
+#define CHARSET_MAP(charset) \
+ (CHARSET_ATTR_MAP (CHARSET_ATTRIBUTES (charset)))
+#define CHARSET_DECODER(charset) \
+ (CHARSET_ATTR_DECODER (CHARSET_ATTRIBUTES (charset)))
+#define CHARSET_ENCODER(charset) \
+ (CHARSET_ATTR_ENCODER (CHARSET_ATTRIBUTES (charset)))
+#define CHARSET_SUBSET(charset) \
+ (CHARSET_ATTR_SUBSET (CHARSET_ATTRIBUTES (charset)))
+#define CHARSET_SUPERSET(charset) \
+ (CHARSET_ATTR_SUPERSET (CHARSET_ATTRIBUTES (charset)))
+#define CHARSET_UNIFY_MAP(charset) \
+ (CHARSET_ATTR_UNIFY_MAP (CHARSET_ATTRIBUTES (charset)))
+#define CHARSET_DEUNIFIER(charset) \
+ (CHARSET_ATTR_DEUNIFIER (CHARSET_ATTRIBUTES (charset)))
-/* Parse multibyte string STR of length LENGTH and set BYTES to the
- byte length of a character at STR. */
-#ifdef BYTE_COMBINING_DEBUG
+/* Nonzero if OBJ is a valid charset symbol. */
+#define CHARSETP(obj) (CHARSET_SYMBOL_HASH_INDEX (obj) >= 0)
-#define PARSE_MULTIBYTE_SEQ(str, length, bytes) \
+/* Check if X is a valid charset symbol. If not, signal an error. */
+#define CHECK_CHARSET(x) \
do { \
- int i = 1; \
- while (i < (length) && ! CHAR_HEAD_P ((str)[i])) i++; \
- (bytes) = BYTES_BY_CHAR_HEAD ((str)[0]); \
- if ((bytes) > i) \
- abort (); \
+ if (! SYMBOLP (x) || CHARSET_SYMBOL_HASH_INDEX (x) < 0) \
+ x = wrong_type_argument (Qcharsetp, (x)); \
} while (0)
-#else /* not BYTE_COMBINING_DEBUG */
-
-#define PARSE_MULTIBYTE_SEQ(str, length, bytes) \
- ((void)(length), (bytes) = BYTES_BY_CHAR_HEAD ((str)[0]))
-
-#endif /* not BYTE_COMBINING_DEBUG */
-#define VALID_LEADING_CODE_P(code) \
- (! NILP (CHARSET_TABLE_ENTRY (code)))
-
-/* Return 1 if the byte sequence at unibyte string STR (LENGTH bytes)
- is valid as a multibyte form. If valid, by a side effect, BYTES is
- set to the byte length of the multibyte form. */
-
-#define UNIBYTE_STR_AS_MULTIBYTE_P(str, length, bytes) \
- (((str)[0] < 0x80 || (str)[0] >= 0xA0) \
- ? ((bytes) = 1) \
- : (((bytes) = BYTES_BY_CHAR_HEAD ((str)[0])), \
- ((bytes) <= (length) \
- && !CHAR_HEAD_P ((str)[1]) \
- && ((bytes) == 2 \
- ? (str)[0] != LEADING_CODE_8_BIT_CONTROL \
- : (!CHAR_HEAD_P ((str)[2]) \
- && ((bytes) == 3 \
- ? (((str)[0] != LEADING_CODE_PRIVATE_11 \
- && (str)[0] != LEADING_CODE_PRIVATE_12) \
- || VALID_LEADING_CODE_P (str[1])) \
- : (!CHAR_HEAD_P ((str)[3]) \
- && VALID_LEADING_CODE_P (str[1]))))))))
-
-
-/* Return 1 if the byte sequence at multibyte string STR is valid as
- a unibyte form. By a side effect, BYTES is set to the byte length
- of one character at STR. */
-
-#define MULTIBYTE_STR_AS_UNIBYTE_P(str, bytes) \
- ((bytes) = BYTES_BY_CHAR_HEAD ((str)[0]), \
- (str)[0] != LEADING_CODE_8_BIT_CONTROL)
-
-/* The charset of character C is stored in CHARSET, and the
- position-codes of C are stored in C1 and C2.
- We store -1 in C2 if the dimension of the charset is 1. */
-
-#define SPLIT_CHAR(c, charset, c1, c2) \
- (SINGLE_BYTE_CHAR_P (c) \
- ? ((charset \
- = (ASCII_BYTE_P (c) \
- ? CHARSET_ASCII \
- : ((c) < 0xA0 ? CHARSET_8_BIT_CONTROL : CHARSET_8_BIT_GRAPHIC))), \
- c1 = (c), c2 = -1) \
- : ((c) & CHAR_FIELD1_MASK \
- ? (charset = (CHAR_FIELD1 (c) \
- + ((c) < MIN_CHAR_PRIVATE_DIMENSION2 ? 0x8F : 0xE0)), \
- c1 = CHAR_FIELD2 (c), \
- c2 = CHAR_FIELD3 (c)) \
- : (charset = CHAR_FIELD2 (c) + 0x70, \
- c1 = CHAR_FIELD3 (c), \
- c2 = -1)))
-
-/* Return 1 if character C has valid printable glyph. */
-#define CHAR_PRINTABLE_P(c) (ASCII_BYTE_P (c) || char_printable_p (c))
-
-/* The charset of the character at STR is stored in CHARSET, and the
- position-codes are stored in C1 and C2.
- We store -1 in C2 if the character is just 2 bytes. */
-
-#define SPLIT_STRING(str, len, charset, c1, c2) \
- ((BYTES_BY_CHAR_HEAD ((unsigned char) *(str)) < 2 \
- || BYTES_BY_CHAR_HEAD ((unsigned char) *(str)) > len \
- || split_string (str, len, &charset, &c1, &c2) < 0) \
- ? c1 = *(str), charset = CHARSET_ASCII \
- : charset)
-
-/* Mapping table from ISO2022's charset (specified by DIMENSION,
- CHARS, and FINAL_CHAR) to Emacs' charset. Should be accessed by
- macro ISO_CHARSET_TABLE (DIMENSION, CHARS, FINAL_CHAR). */
-extern int iso_charset_table[2][2][128];
-
-#define ISO_CHARSET_TABLE(dimension, chars, final_char) \
- iso_charset_table[XINT (dimension) - 1][XINT (chars) > 94][XINT (final_char)]
-
-#define BASE_LEADING_CODE_P(c) (BYTES_BY_CHAR_HEAD ((unsigned char) (c)) > 1)
-
-/* Return how many bytes C will occupy in a multibyte buffer. */
-#define CHAR_BYTES(c) \
- (SINGLE_BYTE_CHAR_P (c) \
- ? ((ASCII_BYTE_P (c) || (c) >= 0xA0) ? 1 : 2) \
- : char_bytes (c))
-
-/* The following two macros CHAR_STRING and STRING_CHAR are the main
- entry points to convert between Emacs's two types of character
- representations: multi-byte form and single-word form (character
- code). */
-
-/* Store multi-byte form of the character C in STR. The caller should
- allocate at least MAX_MULTIBYTE_LENGTH bytes area at STR in
- advance. Returns the length of the multi-byte form. If C is an
- invalid character code, signal an error. */
-
-#define CHAR_STRING(c, str) \
- (SINGLE_BYTE_CHAR_P (c) \
- ? ((ASCII_BYTE_P (c) || c >= 0xA0) \
- ? (*(str) = (unsigned char)(c), 1) \
- : (*(str) = LEADING_CODE_8_BIT_CONTROL, *((str)+ 1) = c + 0x20, 2)) \
- : char_to_string (c, (unsigned char *) str))
-
-/* Like CHAR_STRING but don't signal an error if C is invalid.
- Value is -1 in this case. */
-
-#define CHAR_STRING_NO_SIGNAL(c, str) \
- (SINGLE_BYTE_CHAR_P (c) \
- ? ((ASCII_BYTE_P (c) || c >= 0xA0) \
- ? (*(str) = (unsigned char)(c), 1) \
- : (*(str) = LEADING_CODE_8_BIT_CONTROL, *((str)+ 1) = c + 0x20, 2)) \
- : char_to_string_1 (c, (unsigned char *) str))
-
-/* Return a character code of the character of which multi-byte form
- is at STR and the length is LEN. If STR doesn't contain valid
- multi-byte form, only the first byte in STR is returned. */
-
-#define STRING_CHAR(str, len) \
- (BYTES_BY_CHAR_HEAD ((unsigned char) *(str)) == 1 \
- ? (unsigned char) *(str) \
- : string_to_char (str, len, 0))
-
-/* This is like STRING_CHAR but the third arg ACTUAL_LEN is set to the
- length of the multi-byte form. Just to know the length, use
- MULTIBYTE_FORM_LENGTH. */
-
-#define STRING_CHAR_AND_LENGTH(str, len, actual_len) \
- (BYTES_BY_CHAR_HEAD ((unsigned char) *(str)) == 1 \
- ? ((actual_len) = 1), (unsigned char) *(str) \
- : string_to_char (str, len, &(actual_len)))
-
-/* Fetch the "next" character from Lisp string STRING at byte position
- BYTEIDX, character position CHARIDX. Store it into OUTPUT.
-
- All the args must be side-effect-free.
- BYTEIDX and CHARIDX must be lvalues;
- we increment them past the character fetched. */
-
-#define FETCH_STRING_CHAR_ADVANCE(OUTPUT, STRING, CHARIDX, BYTEIDX) \
-if (1) \
- { \
- CHARIDX++; \
- if (STRING_MULTIBYTE (STRING)) \
- {
\
- const unsigned char *ptr = SDATA (STRING) + BYTEIDX; \
- int space_left = SBYTES (STRING) - BYTEIDX; \
- int actual_len; \
- \
- OUTPUT = STRING_CHAR_AND_LENGTH (ptr, space_left, actual_len); \
- BYTEIDX += actual_len; \
- }
\
- else \
- OUTPUT = SREF (STRING, BYTEIDX++); \
- } \
-else
-
-/* Like FETCH_STRING_CHAR_ADVANCE but assume STRING is multibyte. */
-
-#define FETCH_STRING_CHAR_ADVANCE_NO_CHECK(OUTPUT, STRING, CHARIDX, BYTEIDX) \
-if (1) \
- { \
- const unsigned char *fetch_string_char_ptr = SDATA (STRING) + BYTEIDX; \
- int fetch_string_char_space_left = SBYTES (STRING) - BYTEIDX; \
- int actual_len; \
- \
- OUTPUT \
- = STRING_CHAR_AND_LENGTH (fetch_string_char_ptr, \
- fetch_string_char_space_left, actual_len); \
- \
- BYTEIDX += actual_len; \
- CHARIDX++; \
- } \
-else
-
-/* Like FETCH_STRING_CHAR_ADVANCE but fetch character from the current
- buffer. */
-
-#define FETCH_CHAR_ADVANCE(OUTPUT, CHARIDX, BYTEIDX) \
-if (1) \
- { \
- CHARIDX++; \
- if (!NILP (current_buffer->enable_multibyte_characters)) \
- {
\
- unsigned char *ptr = BYTE_POS_ADDR (BYTEIDX); \
- int space_left = ((CHARIDX < GPT ? GPT_BYTE : Z_BYTE) - BYTEIDX); \
- int actual_len; \
- \
- OUTPUT= STRING_CHAR_AND_LENGTH (ptr, space_left, actual_len); \
- BYTEIDX += actual_len; \
- }
\
- else \
- {
\
- OUTPUT = *(BYTE_POS_ADDR (BYTEIDX)); \
- BYTEIDX++; \
- }
\
- } \
-else
-
-/* Return the length of the multi-byte form at string STR of length LEN. */
-
-#define MULTIBYTE_FORM_LENGTH(str, len) \
- (BYTES_BY_CHAR_HEAD (*(unsigned char *)(str)) == 1 \
- ? 1 \
- : multibyte_form_length (str, len))
-
-/* If P is before LIMIT, advance P to the next character boundary. It
- assumes that P is already at a character boundary of the sane
- mulitbyte form whose end address is LIMIT. */
-
-#define NEXT_CHAR_BOUNDARY(p, limit) \
+/* Check if X is a valid charset symbol. If valid, set ID to the id
+ number of the charset. Otherwise, signal an error. */
+#define CHECK_CHARSET_GET_ID(x, id) \
do { \
- if ((p) < (limit)) \
- (p) += BYTES_BY_CHAR_HEAD (*(p)); \
+ int idx; \
+ \
+ if (! SYMBOLP (x) || (idx = CHARSET_SYMBOL_HASH_INDEX (x)) < 0) \
+ x = wrong_type_argument (Qcharsetp, (x));
\
+ id = XINT (AREF (HASH_VALUE (XHASH_TABLE (Vcharset_hash_table), idx), \
+ charset_id)); \
} while (0)
-/* If P is after LIMIT, advance P to the previous character boundary. */
-
-#define PREV_CHAR_BOUNDARY(p, limit) \
- do { \
- if ((p) > (limit)) \
- {
\
- const unsigned char *p0 = (p); \
- const unsigned char *p_limit = max (limit, p0 - MAX_MULTIBYTE_LENGTH);\
+/* Check if X is a valid charset symbol. If valid, set ATTR to the
+ attr vector of the charset. Otherwise, signal an error. */
+#define CHECK_CHARSET_GET_ATTR(x, attr) \
do { \
- p0--; \
- } while (p0 >= p_limit && ! CHAR_HEAD_P (*p0)); \
- /* If BBCH(*p0) > p-p0, it means we were not on a boundary. */ \
- (p) = (BYTES_BY_CHAR_HEAD (*p0) >= (p) - p0) ? p0 : (p) - 1; \
- }
\
+ if (!SYMBOLP (x) || NILP (attr = CHARSET_SYMBOL_ATTRIBUTES (x))) \
+ x = wrong_type_argument (Qcharsetp, (x));
\
} while (0)
-#define AT_CHAR_BOUNDARY_P(result, p, limit) \
- do { \
- if (CHAR_HEAD_P (*(p)) || (p) <= limit) \
- /* Optimization for the common case. */ \
- (result) = 1; \
- else \
- { \
- const unsigned char *p_aux = (p)+1; \
- PREV_CHAR_BOUNDARY (p_aux, limit); \
- (result) = (p_aux == (p)); \
- } \
-} while (0)
-
-#ifdef emacs
-
-/* Increase the buffer byte position POS_BYTE of the current buffer to
- the next character boundary. This macro relies on the fact that
- *GPT_ADDR and *Z_ADDR are always accessible and the values are
- '\0'. No range checking of POS. */
-#ifdef BYTE_COMBINING_DEBUG
-
-#define INC_POS(pos_byte) \
+#define CHECK_CHARSET_GET_CHARSET(x, charset) \
do { \
- unsigned char *p = BYTE_POS_ADDR (pos_byte); \
- if (BASE_LEADING_CODE_P (*p)) \
- { \
- int len, bytes; \
- len = Z_BYTE - pos_byte; \
- PARSE_MULTIBYTE_SEQ (p, len, bytes); \
- pos_byte += bytes; \
- } \
- else \
- pos_byte++; \
+ int id; \
+ CHECK_CHARSET_GET_ID (x, id); \
+ charset = CHARSET_FROM_ID (id); \
} while (0)
-#else /* not BYTE_COMBINING_DEBUG */
-#define INC_POS(pos_byte) \
- do { \
- unsigned char *p = BYTE_POS_ADDR (pos_byte); \
- pos_byte += BYTES_BY_CHAR_HEAD (*p); \
- } while (0)
+/* Lookup Vcharset_order_list and return the first charset that
+ contains the character C. */
+#define CHAR_CHARSET(c) \
+ ((c) < 0x80 ? CHARSET_FROM_ID (charset_ascii) \
+ : char_charset ((c), Qnil, NULL))
-#endif /* not BYTE_COMBINING_DEBUG */
+#if 0
+/* Char-table of charset-sets. Each element is a bool vector indexed
+ by a charset ID. */
+extern Lisp_Object Vchar_charset_set;
+
+/* Charset-bag of character C. */
+#define CHAR_CHARSET_SET(c) \
+ CHAR_TABLE_REF (Vchar_charset_set, c)
-/* Decrease the buffer byte position POS_BYTE of the current buffer to
- the previous character boundary. No range checking of POS. */
-#define DEC_POS(pos_byte) \
- do { \
- unsigned char *p, *p_min; \
- \
- pos_byte--;
\
- if (pos_byte < GPT_BYTE) \
- p = BEG_ADDR + pos_byte - BEG_BYTE, p_min = BEG_ADDR; \
- else \
- p = BEG_ADDR + GAP_SIZE + pos_byte - BEG_BYTE, p_min = GAP_END_ADDR;\
- if (p > p_min && !CHAR_HEAD_P (*p))
\
- {
\
- unsigned char *pend = p--; \
- int len, bytes; \
- if (p_min < p - MAX_MULTIBYTE_LENGTH) \
- p_min = p - MAX_MULTIBYTE_LENGTH; \
- while (p > p_min && !CHAR_HEAD_P (*p)) p--; \
- len = pend + 1 - p; \
- PARSE_MULTIBYTE_SEQ (p, len, bytes); \
- if (bytes == len) \
- pos_byte -= len - 1; \
- }
\
- } while (0)
+/* Check if two characters C1 and C2 belong to the same charset. */
+#define SAME_CHARSET_P(c1, c2) \
+ intersection_p (CHAR_CHARSET_SET (c1), CHAR_CHARSET_SET (c2))
-/* Increment both CHARPOS and BYTEPOS, each in the appropriate way. */
+#endif
-#define INC_BOTH(charpos, bytepos) \
-do \
- { \
- (charpos)++; \
- if (NILP (current_buffer->enable_multibyte_characters)) \
- (bytepos)++; \
- else \
- INC_POS ((bytepos)); \
- } \
-while (0)
-
-/* Decrement both CHARPOS and BYTEPOS, each in the appropriate way. */
-
-#define DEC_BOTH(charpos, bytepos) \
-do \
- { \
- (charpos)--; \
- if (NILP (current_buffer->enable_multibyte_characters)) \
- (bytepos)--; \
- else \
- DEC_POS ((bytepos)); \
- } \
-while (0)
-
-/* Increase the buffer byte position POS_BYTE of the current buffer to
- the next character boundary. This macro relies on the fact that
- *GPT_ADDR and *Z_ADDR are always accessible and the values are
- '\0'. No range checking of POS_BYTE. */
-#ifdef BYTE_COMBINING_DEBUG
+/* Return a character correponding to the code-point CODE of CHARSET.
+ Try some optimization before calling decode_char. */
-#define BUF_INC_POS(buf, pos_byte) \
- do { \
- unsigned char *p = BUF_BYTE_ADDRESS (buf, pos_byte); \
- if (BASE_LEADING_CODE_P (*p)) \
- { \
- int len, bytes; \
- len = BUF_Z_BYTE (buf) - pos_byte; \
- PARSE_MULTIBYTE_SEQ (p, len, bytes); \
- pos_byte += bytes; \
- } \
- else \
- pos_byte++; \
- } while (0)
+#define DECODE_CHAR(charset, code) \
+ ((ASCII_BYTE_P (code) && (charset)->ascii_compatible_p) \
+ ? (code) \
+ : ((code) < (charset)->min_code || (code) > (charset)->max_code) \
+ ? -1
\
+ : (charset)->unified_p \
+ ? decode_char ((charset), (code)) \
+ : (charset)->method == CHARSET_METHOD_OFFSET
\
+ ? ((charset)->code_linear_p \
+ ? (code) - (charset)->min_code + (charset)->code_offset \
+ : decode_char ((charset), (code))) \
+ : (charset)->method == CHARSET_METHOD_MAP \
+ ? ((charset)->code_linear_p \
+ ? XINT (AREF (CHARSET_DECODER (charset), \
+ (code) - (charset)->min_code)) \
+ : decode_char ((charset), (code))) \
+ : decode_char ((charset), (code)))
+
+
+/* If CHARSET is a simple offset base charset, return it's offset,
+ otherwise return -1. */
+#define CHARSET_OFFSET(charset) \
+ (((charset)->method == CHARSET_METHOD_OFFSET \
+ && (charset)->code_linear_p \
+ && ! (charset)->unified_p) \
+ ? (charset)->code_offset - (charset)->min_code \
+ : -1)
+
+extern Lisp_Object charset_work;
+
+/* Return a code point of CHAR in CHARSET.
+ Try some optimization before calling encode_char. */
+
+#define ENCODE_CHAR(charset, c)
\
+ ((ASCII_CHAR_P (c) && (charset)->ascii_compatible_p) \
+ ? (c) \
+ : ((charset)->unified_p \
+ || (charset)->method == CHARSET_METHOD_SUBSET \
+ || (charset)->method == CHARSET_METHOD_SUPERSET) \
+ ? encode_char ((charset), (c)) \
+ : ((c) < (charset)->min_char || (c) > (charset)->max_char) \
+ ? (charset)->invalid_code \
+ : (charset)->method == CHARSET_METHOD_OFFSET
\
+ ? ((charset)->code_linear_p \
+ ? (c) - (charset)->code_offset + (charset)->min_code \
+ : encode_char ((charset), (c))) \
+ : (charset)->method == CHARSET_METHOD_MAP \
+ ? ((charset)->compact_codes_p \
+ ? (charset_work = CHAR_TABLE_REF (CHARSET_ENCODER (charset), (c)), \
+ (NILP (charset_work) \
+ ? (charset)->invalid_code \
+ : XFASTINT (charset_work))) \
+ : encode_char ((charset), (c))) \
+ : encode_char ((charset), (c)))
+
+
+/* Set to 1 when a charset map is loaded to warn that a buffer text
+ and a string data may be relocated. */
+extern int charset_map_loaded;
+
+
+/* Set CHARSET to the charset highest priority of C, CODE to the
+ code-point of C in CHARSET. */
+#define SPLIT_CHAR(c, charset, code) \
+ ((charset) = char_charset ((c), Qnil, &(code)))
+
+
+#define ISO_MAX_DIMENSION 3
+#define ISO_MAX_CHARS 2
+#define ISO_MAX_FINAL 0x80 /* only 0x30..0xFF are used */
-#else /* not BYTE_COMBINING_DEBUG */
-
-#define BUF_INC_POS(buf, pos_byte) \
- do { \
- unsigned char *p = BUF_BYTE_ADDRESS (buf, pos_byte); \
- pos_byte += BYTES_BY_CHAR_HEAD (*p); \
- } while (0)
+/* Mapping table from ISO2022's charset (specified by DIMENSION,
+ CHARS, and FINAL_CHAR) to Emacs' charset ID. Should be accessed by
+ macro ISO_CHARSET_TABLE (DIMENSION, CHARS, FINAL_CHAR). */
+extern int iso_charset_table[ISO_MAX_DIMENSION][ISO_MAX_CHARS][ISO_MAX_FINAL];
-#endif /* not BYTE_COMBINING_DEBUG */
+/* A charset of type iso2022 who has DIMENSION, CHARS, and FINAL
+ (final character). */
+#define ISO_CHARSET_TABLE(dimension, chars_96, final) \
+ iso_charset_table[(dimension) - 1][(chars_96)][(final)]
+
+/* Nonzero if the charset who has FAST_MAP may contain C. */
+#define CHARSET_FAST_MAP_REF(c, fast_map) \
+ ((c) < 0x10000 \
+ ? fast_map[(c) >> 10] & (1 << (((c) >> 7) & 7)) \
+ : fast_map[((c) >> 15) + 62] & (1 << (((c) >> 12) & 7)))
-/* Decrease the buffer byte position POS_BYTE of the current buffer to
- the previous character boundary. No range checking of POS_BYTE. */
-#define BUF_DEC_POS(buf, pos_byte) \
+#define CHARSET_FAST_MAP_SET(c, fast_map) \
do { \
- unsigned char *p, *p_min; \
- pos_byte--;
\
- if (pos_byte < BUF_GPT_BYTE (buf)) \
- {
\
- p = BUF_BEG_ADDR (buf) + pos_byte - BEG_BYTE; \
- p_min = BUF_BEG_ADDR (buf); \
- }
\
+ if ((c) < 0x10000) \
+ (fast_map)[(c) >> 10] |= 1 << (((c) >> 7) & 7); \
else \
- {
\
- p = BUF_BEG_ADDR (buf) + BUF_GAP_SIZE (buf) + pos_byte - BEG_BYTE;\
- p_min = BUF_GAP_END_ADDR (buf); \
- }
\
- if (p > p_min && !CHAR_HEAD_P (*p))
\
- {
\
- unsigned char *pend = p--; \
- int len, bytes; \
- if (p_min < p - MAX_MULTIBYTE_LENGTH) \
- p_min = p - MAX_MULTIBYTE_LENGTH; \
- while (p > p_min && !CHAR_HEAD_P (*p)) p--; \
- len = pend + 1 - p; \
- PARSE_MULTIBYTE_SEQ (p, len, bytes); \
- if (bytes == len) \
- pos_byte -= len - 1; \
- }
\
+ (fast_map)[((c) >> 15) + 62] |= 1 << (((c) >> 12) & 7); \
} while (0)
-#endif /* emacs */
-/* This is the maximum byte length of multi-byte sequence. */
-#define MAX_MULTIBYTE_LENGTH 4
-extern void invalid_character P_ ((int)) NO_RETURN;
+/* 1 if CHARSET may contain the character C. */
+#define CHAR_CHARSET_P(c, charset) \
+ ((ASCII_CHAR_P (c) && (charset)->ascii_compatible_p) \
+ || ((CHARSET_UNIFIED_P (charset) \
+ || (charset)->method == CHARSET_METHOD_SUBSET \
+ || (charset)->method == CHARSET_METHOD_SUPERSET) \
+ ? encode_char ((charset), (c)) != (charset)->invalid_code \
+ : (CHARSET_FAST_MAP_REF ((c), (charset)->fast_map) \
+ && ((charset)->method == CHARSET_METHOD_OFFSET \
+ ? (c) >= (charset)->min_char && (c) <= (charset)->max_char \
+ : ((charset)->method == CHARSET_METHOD_MAP \
+ && (charset)->compact_codes_p) \
+ ? ! NILP (CHAR_TABLE_REF (CHARSET_ENCODER (charset), (c))) \
+ : encode_char ((charset), (c)) != (charset)->invalid_code))))
+
+
+/* Special macros for emacs-mule encoding. */
+
+/* Leading-code followed by extended leading-code. DIMENSION/COLUMN */
+#define EMACS_MULE_LEADING_CODE_PRIVATE_11 0x9A /* 1/1 */
+#define EMACS_MULE_LEADING_CODE_PRIVATE_12 0x9B /* 1/2 */
+#define EMACS_MULE_LEADING_CODE_PRIVATE_21 0x9C /* 2/2 */
+#define EMACS_MULE_LEADING_CODE_PRIVATE_22 0x9D /* 2/2 */
+
+extern struct charset *emacs_mule_charset[256];
-extern int translate_char P_ ((Lisp_Object, int, int, int, int));
-extern int split_string P_ ((const unsigned char *, int, int *,
- unsigned char *, unsigned char *));
-extern int char_to_string P_ ((int, unsigned char *));
-extern int char_to_string_1 P_ ((int, unsigned char *));
-extern int string_to_char P_ ((const unsigned char *, int, int *));
-extern int char_printable_p P_ ((int c));
-extern int multibyte_form_length P_ ((const unsigned char *, int));
-extern void parse_str_as_multibyte P_ ((const unsigned char *, int, int *,
- int *));
-extern int str_as_multibyte P_ ((unsigned char *, int, int, int *));
-extern int parse_str_to_multibyte P_ ((unsigned char *, int));
-extern int str_to_multibyte P_ ((unsigned char *, int, int));
-extern int str_as_unibyte P_ ((unsigned char *, int));
-extern int get_charset_id P_ ((Lisp_Object));
-extern int find_charset_in_text P_ ((const unsigned char *, int, int, int *,
- Lisp_Object));
-extern int strwidth P_ ((unsigned char *, int));
-extern int c_string_width P_ ((const unsigned char *, int, int, int *, int *));
-extern int lisp_string_width P_ ((Lisp_Object, int, int *, int *));
-extern int char_bytes P_ ((int));
-extern int char_valid_p P_ ((int, int));
-
-EXFUN (Funibyte_char_to_multibyte, 1);
-
-extern Lisp_Object Vtranslation_table_vector;
-
-/* Return a translation table of id number ID. */
-#define GET_TRANSLATION_TABLE(id) \
- (XCDR(XVECTOR(Vtranslation_table_vector)->contents[(id)]))
-
-/* A char-table for characters which may invoke auto-filling. */
-extern Lisp_Object Vauto_fill_chars;
-
-/* Copy LEN bytes from FROM to TO. This macro should be used only
- when a caller knows that LEN is short and the obvious copy loop is
- faster than calling bcopy which has some overhead. Copying a
- multibyte sequence of a multibyte character is the typical case. */
-#define BCOPY_SHORT(from, to, len) \
- do { \
- int i = len; \
- const unsigned char *from_p = from; \
- unsigned char *to_p = to; \
- while (i--) *to_p++ = *from_p++; \
- } while (0)
+
+extern Lisp_Object Qcharsetp;
+
+extern Lisp_Object Qascii, Qunicode;
+extern int charset_ascii, charset_eight_bit;
+extern int charset_iso_8859_1;
+extern int charset_unicode;
+extern int charset_jisx0201_roman;
+extern int charset_jisx0208_1978;
+extern int charset_jisx0208;
+
+extern int charset_unibyte;
+
+extern struct charset *char_charset P_ ((int, Lisp_Object, unsigned *));
+extern Lisp_Object charset_attributes P_ ((int));
+
+extern int decode_char P_ ((struct charset *, unsigned));
+extern unsigned encode_char P_ ((struct charset *, int));
+extern int string_xstring_p P_ ((Lisp_Object));
+
+extern void map_charset_chars P_ ((void (*) (Lisp_Object, Lisp_Object),
+ Lisp_Object, Lisp_Object,
+ struct charset *, unsigned, unsigned));
+
+EXFUN (Funify_charset, 3);
#endif /* EMACS_CHARSET_H */
- [Emacs-diffs] Changes to emacs/src/charset.h,v,
Miles Bader <=