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Diffstat (limited to 'src/charset.h')
| -rw-r--r-- | src/charset.h | 1297 |
1 files changed, 480 insertions, 817 deletions
diff --git a/src/charset.h b/src/charset.h index fd8905e47d8..1ecbb49027b 100644 --- a/src/charset.h +++ b/src/charset.h @@ -1,7 +1,10 @@ -/* Header for multibyte character handler. +/* Header for charset handler. Copyright (C) 1995, 1997, 1998 Electrotechnical Laboratory, JAPAN. - Licensed to the Free Software Foundation. + Licensed to the Free Software Foundation. Copyright (C) 2001 Free Software Foundation, Inc. + Copyright (C) 2003 + National Institute of Advanced Industrial Science and Technology (AIST) + Registration Number H13PRO009 This file is part of GNU Emacs. @@ -23,850 +26,510 @@ Boston, MA 02111-1307, USA. */ #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) */ - -/* 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) < 0x100) - -/* 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))) +/* Index to arguments of Fdefine_charset_internal. */ + +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 character code in the charset to + the corresponding Unicode character. */ + 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; -/* 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 iff C is a valid normal or - generic character. If GENERICP is zero, return nonzero iff 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. */ - -#define DEFAULT_NONASCII_INSERT_OFFSET 0x800 - -/* Parse multibyte string STR of length LENGTH and set BYTES to the - byte length of a character at STR. */ - -#ifdef BYTE_COMBINING_DEBUG - -#define PARSE_MULTIBYTE_SEQ(str, length, bytes) \ - do { \ - int i = 1; \ - while (i < (length) && ! CHAR_HEAD_P ((str)[i])) i++; \ - (bytes) = BYTES_BY_CHAR_HEAD ((str)[0]); \ - if ((bytes) > i) \ - abort (); \ - } while (0) + /* 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]; -#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 iff 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 iff 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 iff 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) \ - do { \ - if ((p) < (limit)) \ - (p) += BYTES_BY_CHAR_HEAD (*(p)); \ - } while (0) + /* 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 P is after LIMIT, advance P to the previous character boundary. - It assumes that P is already at a character boundary of the sane - mulitbyte form whose beginning address is LIMIT. */ + /* 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; -#define PREV_CHAR_BOUNDARY(p, limit) \ - do { \ - if ((p) > (limit)) \ - { \ - const unsigned char *p0 = (p); \ - do { \ - p0--; \ - } while (p0 >= limit && ! CHAR_HEAD_P (*p0)); \ - (p) = (BYTES_BY_CHAR_HEAD (*p0) == (p) - p0) ? p0 : (p) - 1; \ - } \ - } while (0) + /* 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; -#ifdef emacs + /* 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 iff the charset is compatible with ASCII. */ + int ascii_compatible_p; -/* 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. */ + /* Nonzero iff the charset is supplementary. */ + int supplementary_p; + + /* Nonzero iff 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; +extern int charset_table_used; + +#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))) + + +/* Nonzero iff OBJ is a valid charset symbol. */ +#define CHARSETP(obj) (CHARSET_SYMBOL_HASH_INDEX (obj) >= 0) + +/* Check if X is a valid charset symbol. If not, signal an error. */ +#define CHECK_CHARSET(x) \ + do { \ + if (! SYMBOLP (x) || CHARSET_SYMBOL_HASH_INDEX (x) < 0) \ + x = wrong_type_argument (Qcharsetp, (x)); \ + } while (0) -#ifdef BYTE_COMBINING_DEBUG -#define INC_POS(pos_byte) \ - 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++; \ +/* 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 { \ + 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) -#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); \ +/* 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 { \ + if (!SYMBOLP (x) || NILP (attr = CHARSET_SYMBOL_ATTRIBUTES (x))) \ + x = wrong_type_argument (Qcharsetp, (x)); \ } while (0) -#endif /* not BYTE_COMBINING_DEBUG */ -/* 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; \ - } \ +#define CHECK_CHARSET_GET_CHARSET(x, charset) \ + do { \ + int id; \ + CHECK_CHARSET_GET_ID (x, id); \ + charset = CHARSET_FROM_ID (id); \ } while (0) -/* Increment both CHARPOS and BYTEPOS, each in the appropriate way. */ -#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) +/* Lookup Vcharset_order_list and return the first charset that + contains the character C. */ +#define CHAR_CHARSET(c) \ + char_charset ((c), Qnil, NULL) -/* 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. */ +#if 0 +/* Char-table of charset-sets. Each element is a bool vector indexed + by a charset ID. */ +extern Lisp_Object Vchar_charset_set; -#ifdef BYTE_COMBINING_DEBUG +/* Charset-bag of character C. */ +#define CHAR_CHARSET_SET(c) \ + CHAR_TABLE_REF (Vchar_charset_set, c) -#define BUF_INC_POS(buf, pos_byte) \ +/* 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)) + +#endif + + +/* Return a character correponding to the code-point CODE of CHARSET. + Try some optimization before calling decode_char. */ + +#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))) + + +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 */ + +/* 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]; + +/* 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 iff 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))) + +#define CHARSET_FAST_MAP_SET(c, fast_map) \ 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; \ - } \ + if ((c) < 0x10000) \ + (fast_map)[(c) >> 10] |= 1 << (((c) >> 7) & 7); \ else \ - pos_byte++; \ + (fast_map)[((c) >> 15) + 62] |= 1 << (((c) >> 12) & 7); \ } while (0) -#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) -#endif /* not BYTE_COMBINING_DEBUG */ +/* 1 iff CHARSET may contain the character C. */ +#define CHAR_CHARSET_P(c, charset) \ + ((ASCII_CHAR_P (c) && (charset)->ascii_compatible_p) \ + || (CHARSET_UNIFIED_P (charset) \ + ? 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)))) -/* 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) \ - 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); \ - } \ - 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; \ - } \ - } while (0) + +/* Special macros for emacs-mule encoding. */ -#endif /* emacs */ - -/* This is the maximum byte length of multi-byte sequence. */ -#define MAX_MULTIBYTE_LENGTH 4 - -extern void invalid_character P_ ((int)); - -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) +/* 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 Lisp_Object Qcharsetp; + +extern Lisp_Object Qascii, Qunicode; +extern int charset_ascii, charset_eight_bit; +extern int charset_iso_8859_1; +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 */ |