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b0e3cf2b56
(Vcharacter_unification_table_vector): New variable. (syms_of_charset): Declare it as a Lisp symbol. Declare a Lisp variable min-composite-char. (unify_char): Delete unnecessary codes.
1710 lines
50 KiB
C
1710 lines
50 KiB
C
/* Basic multilingual character support.
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Copyright (C) 1995, 1997, 1998 Electrotechnical Laboratory, JAPAN.
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Licensed to the Free Software Foundation.
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This file is part of GNU Emacs.
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GNU Emacs is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* At first, see the document in `charset.h' to understand the code in
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this file. */
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#include <stdio.h>
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#ifdef emacs
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#include <sys/types.h>
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#include <config.h>
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#include "lisp.h"
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#include "buffer.h"
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#include "charset.h"
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#include "coding.h"
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#include "disptab.h"
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#else /* not emacs */
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#include "mulelib.h"
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#endif /* emacs */
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Lisp_Object Qcharset, Qascii, Qcomposition;
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/* Declaration of special leading-codes. */
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int leading_code_composition; /* for composite characters */
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int leading_code_private_11; /* for private DIMENSION1 of 1-column */
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int leading_code_private_12; /* for private DIMENSION1 of 2-column */
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int leading_code_private_21; /* for private DIMENSION2 of 1-column */
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int leading_code_private_22; /* for private DIMENSION2 of 2-column */
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/* Declaration of special charsets. */
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int charset_ascii; /* ASCII */
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int charset_composition; /* for a composite character */
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int charset_latin_iso8859_1; /* ISO8859-1 (Latin-1) */
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int charset_jisx0208_1978; /* JISX0208.1978 (Japanese Kanji old set) */
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int charset_jisx0208; /* JISX0208.1983 (Japanese Kanji) */
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int charset_katakana_jisx0201; /* JISX0201.Kana (Japanese Katakana) */
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int charset_latin_jisx0201; /* JISX0201.Roman (Japanese Roman) */
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int charset_big5_1; /* Big5 Level 1 (Chinese Traditional) */
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int charset_big5_2; /* Big5 Level 2 (Chinese Traditional) */
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int min_composite_char;
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Lisp_Object Qcharset_table;
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/* A char-table containing information of each character set. */
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Lisp_Object Vcharset_table;
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/* A vector of charset symbol indexed by charset-id. This is used
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only for returning charset symbol from C functions. */
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Lisp_Object Vcharset_symbol_table;
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/* A list of charset symbols ever defined. */
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Lisp_Object Vcharset_list;
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/* Vector of unification table ever defined.
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An ID of a unification table is an index of this vector. */
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Lisp_Object Vcharacter_unification_table_vector;
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/* Tables used by macros BYTES_BY_CHAR_HEAD and WIDTH_BY_CHAR_HEAD. */
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int bytes_by_char_head[256];
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int width_by_char_head[256];
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/* Mapping table from ISO2022's charset (specified by DIMENSION,
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CHARS, and FINAL-CHAR) to Emacs' charset. */
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int iso_charset_table[2][2][128];
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/* Table of pointers to the structure `cmpchar_info' indexed by
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CMPCHAR-ID. */
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struct cmpchar_info **cmpchar_table;
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/* The current size of `cmpchar_table'. */
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static int cmpchar_table_size;
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/* Number of the current composite characters. */
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int n_cmpchars;
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/* Variables used locally in the macro FETCH_MULTIBYTE_CHAR. */
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unsigned char *_fetch_multibyte_char_p;
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int _fetch_multibyte_char_len;
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/* Offset to add to a non-ASCII value when inserting it. */
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int nonascii_insert_offset;
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#define min(X, Y) ((X) < (Y) ? (X) : (Y))
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#define max(X, Y) ((X) > (Y) ? (X) : (Y))
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/* Set STR a pointer to the multi-byte form of the character C. If C
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is not a composite character, the multi-byte form is set in WORKBUF
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and STR points WORKBUF. The caller should allocate at least 4-byte
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area at WORKBUF in advance. Returns the length of the multi-byte
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form. If C is an invalid character to have a multi-byte form,
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signal an error.
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Use macro `CHAR_STRING (C, WORKBUF, STR)' instead of calling this
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function directly if C can be an ASCII character. */
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int
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non_ascii_char_to_string (c, workbuf, str)
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int c;
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unsigned char *workbuf, **str;
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{
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int charset, c1, c2;
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if (COMPOSITE_CHAR_P (c))
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{
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int cmpchar_id = COMPOSITE_CHAR_ID (c);
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if (cmpchar_id < n_cmpchars)
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{
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*str = cmpchar_table[cmpchar_id]->data;
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return cmpchar_table[cmpchar_id]->len;
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}
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else
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{
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error ("Invalid character: %d", c);
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}
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}
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SPLIT_NON_ASCII_CHAR (c, charset, c1, c2);
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if (!charset
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|| ! CHARSET_DEFINED_P (charset)
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|| c1 >= 0 && c1 < 32
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|| c2 >= 0 && c2 < 32)
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error ("Invalid character: %d", c);
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*str = workbuf;
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*workbuf++ = CHARSET_LEADING_CODE_BASE (charset);
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if (*workbuf = CHARSET_LEADING_CODE_EXT (charset))
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workbuf++;
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*workbuf++ = c1 | 0x80;
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if (c2 >= 0)
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*workbuf++ = c2 | 0x80;
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return (workbuf - *str);
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}
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/* Return a non-ASCII character of which multi-byte form is at STR of
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length LEN. If ACTUAL_LEN is not NULL, the actual length of the
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character is set to the address ACTUAL_LEN.
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Use macro `STRING_CHAR (STR, LEN)' instead of calling this function
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directly if STR can hold an ASCII character. */
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string_to_non_ascii_char (str, len, actual_len)
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unsigned char *str;
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int len, *actual_len;
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{
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int charset;
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unsigned char c1, c2;
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register int c;
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if (SPLIT_STRING (str, len, charset, c1, c2) == CHARSET_ASCII)
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{
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if (actual_len)
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*actual_len = 1;
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return (int) *str;
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}
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c = MAKE_NON_ASCII_CHAR (charset, c1, c2);
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if (actual_len)
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*actual_len = (charset == CHARSET_COMPOSITION
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? cmpchar_table[COMPOSITE_CHAR_ID (c)]->len
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: BYTES_BY_CHAR_HEAD (*str));
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return c;
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}
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/* Return the length of the multi-byte form at string STR of length LEN. */
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int
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multibyte_form_length (str, len)
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unsigned char *str;
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int len;
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{
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int charset;
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unsigned char c1, c2;
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register int c;
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if (SPLIT_STRING (str, len, charset, c1, c2) == CHARSET_ASCII)
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return 1;
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return (charset == CHARSET_COMPOSITION
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? cmpchar_table[(c1 << 7) | c2]->len
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: BYTES_BY_CHAR_HEAD (*str));
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}
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/* Check if string STR of length LEN contains valid multi-byte form of
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a character. If valid, charset and position codes of the character
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is set at *CHARSET, *C1, and *C2, and return 0. If not valid,
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return -1. This should be used only in the macro SPLIT_STRING
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which checks range of STR in advance. */
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split_non_ascii_string (str, len, charset, c1, c2)
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register unsigned char *str, *c1, *c2;
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register int len, *charset;
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{
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register unsigned int cs = *str++;
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if (cs == LEADING_CODE_COMPOSITION)
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{
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int cmpchar_id = str_cmpchar_id (str - 1, len);
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if (cmpchar_id < 0)
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return -1;
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*charset = cs, *c1 = cmpchar_id >> 7, *c2 = cmpchar_id & 0x7F;
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}
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else if ((cs < LEADING_CODE_PRIVATE_11 || (cs = *str++) >= 0xA0)
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&& CHARSET_DEFINED_P (cs))
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{
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*charset = cs;
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if (*str < 0xA0)
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return -1;
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*c1 = (*str++) & 0x7F;
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if (CHARSET_DIMENSION (cs) == 2)
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{
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if (*str < 0xA0)
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return -1;
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*c2 = (*str++) & 0x7F;
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}
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}
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else
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return -1;
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return 0;
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}
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/* Return a character unified with C (or a character made of CHARSET,
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C1, and C2) in unification table TABLE. If no unification is found
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in TABLE, return C. */
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unify_char (table, c, charset, c1, c2)
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Lisp_Object table;
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int c, charset, c1, c2;
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{
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Lisp_Object ch;
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int alt_charset, alt_c1, alt_c2, dimension;
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if (c < 0) c = MAKE_CHAR (charset, c1, c2);
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if (!CHAR_TABLE_P (table)
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|| (ch = Faref (table, make_number (c)), !INTEGERP (ch))
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|| XINT (ch) < 0)
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return c;
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SPLIT_CHAR (XFASTINT (ch), alt_charset, alt_c1, alt_c2);
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dimension = CHARSET_DIMENSION (alt_charset);
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if (dimension == 1 && alt_c1 > 0 || dimension == 2 && alt_c2 > 0)
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/* CH is not a generic character, just return it. */
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return XFASTINT (ch);
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/* Since CH is a generic character, we must return a specific
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charater which has the same position codes as C from CH. */
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if (charset < 0)
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SPLIT_CHAR (c, charset, c1, c2);
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if (dimension != CHARSET_DIMENSION (charset))
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/* We can't make such a character because of dimension mismatch. */
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return c;
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return MAKE_CHAR (alt_charset, c1, c2);
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}
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#define DEFAULT_NONASCII_INSERT_OFFSET 0x800
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/* Convert the unibyte character C to multibyte
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based on nonascii_insert_offset. Note that copy_text in insdel.c
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has similar code. */
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int
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unibyte_char_to_multibyte (c)
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int c;
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{
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if (c >= 0200 && c < 0400)
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{
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if (nonascii_insert_offset > 0)
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c += nonascii_insert_offset;
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else
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c += DEFAULT_NONASCII_INSERT_OFFSET;
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}
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return c;
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}
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/* Update the table Vcharset_table with the given arguments (see the
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document of `define-charset' for the meaning of each argument).
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Several other table contents are also updated. The caller should
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check the validity of CHARSET-ID and the remaining arguments in
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advance. */
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void
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update_charset_table (charset_id, dimension, chars, width, direction,
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iso_final_char, iso_graphic_plane,
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short_name, long_name, description)
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Lisp_Object charset_id, dimension, chars, width, direction;
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Lisp_Object iso_final_char, iso_graphic_plane;
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Lisp_Object short_name, long_name, description;
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{
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int charset = XINT (charset_id);
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int bytes;
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unsigned char leading_code_base, leading_code_ext;
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if (NILP (CHARSET_TABLE_ENTRY (charset)))
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CHARSET_TABLE_ENTRY (charset)
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= Fmake_vector (make_number (CHARSET_MAX_IDX), Qnil);
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/* Get byte length of multibyte form, base leading-code, and
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extended leading-code of the charset. See the comment under the
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title "GENERAL NOTE on CHARACTER SET (CHARSET)" in charset.h. */
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bytes = XINT (dimension);
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if (charset < MIN_CHARSET_PRIVATE_DIMENSION1)
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{
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/* Official charset, it doesn't have an extended leading-code. */
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if (charset != CHARSET_ASCII)
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bytes += 1; /* For a base leading-code. */
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leading_code_base = charset;
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leading_code_ext = 0;
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}
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else
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{
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/* Private charset. */
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bytes += 2; /* For base and extended leading-codes. */
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leading_code_base
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= (charset < LEADING_CODE_EXT_12
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? LEADING_CODE_PRIVATE_11
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: (charset < LEADING_CODE_EXT_21
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? LEADING_CODE_PRIVATE_12
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: (charset < LEADING_CODE_EXT_22
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? LEADING_CODE_PRIVATE_21
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: LEADING_CODE_PRIVATE_22)));
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leading_code_ext = charset;
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}
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CHARSET_TABLE_INFO (charset, CHARSET_ID_IDX) = charset_id;
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CHARSET_TABLE_INFO (charset, CHARSET_BYTES_IDX) = make_number (bytes);
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CHARSET_TABLE_INFO (charset, CHARSET_DIMENSION_IDX) = dimension;
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CHARSET_TABLE_INFO (charset, CHARSET_CHARS_IDX) = chars;
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CHARSET_TABLE_INFO (charset, CHARSET_WIDTH_IDX) = width;
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CHARSET_TABLE_INFO (charset, CHARSET_DIRECTION_IDX) = direction;
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CHARSET_TABLE_INFO (charset, CHARSET_LEADING_CODE_BASE_IDX)
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= make_number (leading_code_base);
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CHARSET_TABLE_INFO (charset, CHARSET_LEADING_CODE_EXT_IDX)
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= make_number (leading_code_ext);
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CHARSET_TABLE_INFO (charset, CHARSET_ISO_FINAL_CHAR_IDX) = iso_final_char;
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CHARSET_TABLE_INFO (charset, CHARSET_ISO_GRAPHIC_PLANE_IDX)
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= iso_graphic_plane;
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CHARSET_TABLE_INFO (charset, CHARSET_SHORT_NAME_IDX) = short_name;
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CHARSET_TABLE_INFO (charset, CHARSET_LONG_NAME_IDX) = long_name;
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CHARSET_TABLE_INFO (charset, CHARSET_DESCRIPTION_IDX) = description;
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CHARSET_TABLE_INFO (charset, CHARSET_PLIST_IDX) = Qnil;
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{
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/* If we have already defined a charset which has the same
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DIMENSION, CHARS and ISO-FINAL-CHAR but the different
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DIRECTION, we must update the entry REVERSE-CHARSET of both
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charsets. If there's no such charset, the value of the entry
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is set to nil. */
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int i;
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for (i = 0; i <= MAX_CHARSET; i++)
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if (!NILP (CHARSET_TABLE_ENTRY (i)))
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{
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if (CHARSET_DIMENSION (i) == XINT (dimension)
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&& CHARSET_CHARS (i) == XINT (chars)
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&& CHARSET_ISO_FINAL_CHAR (i) == XINT (iso_final_char)
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&& CHARSET_DIRECTION (i) != XINT (direction))
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{
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CHARSET_TABLE_INFO (charset, CHARSET_REVERSE_CHARSET_IDX)
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= make_number (i);
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CHARSET_TABLE_INFO (i, CHARSET_REVERSE_CHARSET_IDX) = charset_id;
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break;
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}
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}
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if (i > MAX_CHARSET)
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/* No such a charset. */
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CHARSET_TABLE_INFO (charset, CHARSET_REVERSE_CHARSET_IDX)
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= make_number (-1);
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}
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if (charset != CHARSET_ASCII
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&& charset < MIN_CHARSET_PRIVATE_DIMENSION1)
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{
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/* Update tables bytes_by_char_head and width_by_char_head. */
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bytes_by_char_head[leading_code_base] = bytes;
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width_by_char_head[leading_code_base] = XINT (width);
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/* Update table emacs_code_class. */
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emacs_code_class[charset] = (bytes == 2
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? EMACS_leading_code_2
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: (bytes == 3
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? EMACS_leading_code_3
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: EMACS_leading_code_4));
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}
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/* Update table iso_charset_table. */
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if (ISO_CHARSET_TABLE (dimension, chars, iso_final_char) < 0)
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ISO_CHARSET_TABLE (dimension, chars, iso_final_char) = charset;
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}
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|
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#ifdef emacs
|
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|
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/* Return charset id of CHARSET_SYMBOL, or return -1 if CHARSET_SYMBOL
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is invalid. */
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int
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get_charset_id (charset_symbol)
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Lisp_Object charset_symbol;
|
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{
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Lisp_Object val;
|
||
int charset;
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||
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return ((SYMBOLP (charset_symbol)
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&& (val = Fget (charset_symbol, Qcharset), VECTORP (val))
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&& (charset = XINT (XVECTOR (val)->contents[CHARSET_ID_IDX]),
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CHARSET_VALID_P (charset)))
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? charset : -1);
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}
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|
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/* Return an identification number for a new private charset of
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DIMENSION and WIDTH. If there's no more room for the new charset,
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return 0. */
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Lisp_Object
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get_new_private_charset_id (dimension, width)
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int dimension, width;
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{
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int charset, from, to;
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||
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if (dimension == 1)
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||
{
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if (width == 1)
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from = LEADING_CODE_EXT_11, to = LEADING_CODE_EXT_12;
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||
else
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||
from = LEADING_CODE_EXT_12, to = LEADING_CODE_EXT_21;
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||
}
|
||
else
|
||
{
|
||
if (width == 1)
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from = LEADING_CODE_EXT_21, to = LEADING_CODE_EXT_22;
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else
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from = LEADING_CODE_EXT_22, to = LEADING_CODE_EXT_MAX + 1;
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||
}
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for (charset = from; charset < to; charset++)
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if (!CHARSET_DEFINED_P (charset)) break;
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||
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return make_number (charset < to ? charset : 0);
|
||
}
|
||
|
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DEFUN ("define-charset", Fdefine_charset, Sdefine_charset, 3, 3, 0,
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"Define CHARSET-ID as the identification number of CHARSET with INFO-VECTOR.\n\
|
||
If CHARSET-ID is nil, it is decided automatically, which means CHARSET is\n\
|
||
treated as a private charset.\n\
|
||
INFO-VECTOR is a vector of the format:\n\
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||
[DIMENSION CHARS WIDTH DIRECTION ISO-FINAL-CHAR ISO-GRAPHIC-PLANE\n\
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||
SHORT-NAME LONG-NAME DESCRIPTION]\n\
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||
The meanings of each elements is as follows:\n\
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DIMENSION (integer) is the number of bytes to represent a character: 1 or 2.\n\
|
||
CHARS (integer) is the number of characters in a dimension: 94 or 96.\n\
|
||
WIDTH (integer) is the number of columns a character in the charset\n\
|
||
occupies on the screen: one of 0, 1, and 2.\n\
|
||
\n\
|
||
DIRECTION (integer) is the rendering direction of characters in the\n\
|
||
charset when rendering. If 0, render from right to left, else\n\
|
||
render from left to right.\n\
|
||
\n\
|
||
ISO-FINAL-CHAR (character) is the final character of the\n\
|
||
corresponding ISO 2022 charset.\n\
|
||
\n\
|
||
ISO-GRAPHIC-PLANE (integer) is the graphic plane to be invoked\n\
|
||
while encoding to variants of ISO 2022 coding system, one of the\n\
|
||
following: 0/graphic-plane-left(GL), 1/graphic-plane-right(GR).\n\
|
||
\n\
|
||
SHORT-NAME (string) is the short name to refer to the charset.\n\
|
||
\n\
|
||
LONG-NAME (string) is the long name to refer to the charset.\n\
|
||
\n\
|
||
DESCRIPTION (string) is the description string of the charset.")
|
||
(charset_id, charset_symbol, info_vector)
|
||
Lisp_Object charset_id, charset_symbol, info_vector;
|
||
{
|
||
Lisp_Object *vec;
|
||
|
||
if (!NILP (charset_id))
|
||
CHECK_NUMBER (charset_id, 0);
|
||
CHECK_SYMBOL (charset_symbol, 1);
|
||
CHECK_VECTOR (info_vector, 2);
|
||
|
||
if (! NILP (charset_id))
|
||
{
|
||
if (! CHARSET_VALID_P (XINT (charset_id)))
|
||
error ("Invalid CHARSET: %d", XINT (charset_id));
|
||
else if (CHARSET_DEFINED_P (XINT (charset_id)))
|
||
error ("Already defined charset: %d", XINT (charset_id));
|
||
}
|
||
|
||
vec = XVECTOR (info_vector)->contents;
|
||
if (XVECTOR (info_vector)->size != 9
|
||
|| !INTEGERP (vec[0]) || !(XINT (vec[0]) == 1 || XINT (vec[0]) == 2)
|
||
|| !INTEGERP (vec[1]) || !(XINT (vec[1]) == 94 || XINT (vec[1]) == 96)
|
||
|| !INTEGERP (vec[2]) || !(XINT (vec[2]) == 1 || XINT (vec[2]) == 2)
|
||
|| !INTEGERP (vec[3]) || !(XINT (vec[3]) == 0 || XINT (vec[3]) == 1)
|
||
|| !INTEGERP (vec[4]) || !(XINT (vec[4]) >= '0' && XINT (vec[4]) <= '~')
|
||
|| !INTEGERP (vec[5]) || !(XINT (vec[5]) == 0 || XINT (vec[5]) == 1)
|
||
|| !STRINGP (vec[6])
|
||
|| !STRINGP (vec[7])
|
||
|| !STRINGP (vec[8]))
|
||
error ("Invalid info-vector argument for defining charset %s",
|
||
XSYMBOL (charset_symbol)->name->data);
|
||
|
||
if (NILP (charset_id))
|
||
{
|
||
charset_id = get_new_private_charset_id (XINT (vec[0]), XINT (vec[2]));
|
||
if (XINT (charset_id) == 0)
|
||
error ("There's no room for a new private charset %s",
|
||
XSYMBOL (charset_symbol)->name->data);
|
||
}
|
||
|
||
update_charset_table (charset_id, vec[0], vec[1], vec[2], vec[3],
|
||
vec[4], vec[5], vec[6], vec[7], vec[8]);
|
||
Fput (charset_symbol, Qcharset, CHARSET_TABLE_ENTRY (XINT (charset_id)));
|
||
CHARSET_SYMBOL (XINT (charset_id)) = charset_symbol;
|
||
Vcharset_list = Fcons (charset_symbol, Vcharset_list);
|
||
return Qnil;
|
||
}
|
||
|
||
DEFUN ("get-unused-iso-final-char", Fget_unused_iso_final_char,
|
||
Sget_unused_iso_final_char, 2, 2, 0,
|
||
"Return an unsed ISO's final char for a charset of DIMENISION and CHARS.\n\
|
||
DIMENSION is the number of bytes to represent a character: 1 or 2.\n\
|
||
CHARS is the number of characters in a dimension: 94 or 96.\n\
|
||
\n\
|
||
This final char is for private use, thus the range is `0' (48) .. `?' (63).\n\
|
||
If there's no unused final char for the specified kind of charset,\n\
|
||
return nil.")
|
||
(dimension, chars)
|
||
Lisp_Object dimension, chars;
|
||
{
|
||
int final_char;
|
||
|
||
CHECK_NUMBER (dimension, 0);
|
||
CHECK_NUMBER (chars, 1);
|
||
if (XINT (dimension) != 1 && XINT (dimension) != 2)
|
||
error ("Invalid charset dimension %d, it should be 1 or 2",
|
||
XINT (dimension));
|
||
if (XINT (chars) != 94 && XINT (chars) != 96)
|
||
error ("Invalid charset chars %d, it should be 94 or 96",
|
||
XINT (chars));
|
||
for (final_char = '0'; final_char <= '?'; final_char++)
|
||
{
|
||
if (ISO_CHARSET_TABLE (dimension, chars, make_number (final_char)) < 0)
|
||
break;
|
||
}
|
||
return (final_char <= '?' ? make_number (final_char) : Qnil);
|
||
}
|
||
|
||
DEFUN ("declare-equiv-charset", Fdeclare_equiv_charset, Sdeclare_equiv_charset,
|
||
4, 4, 0,
|
||
"Declare a charset of DIMENSION, CHARS, FINAL-CHAR is the same as CHARSET.\n\
|
||
CHARSET should be defined by `defined-charset' in advance.")
|
||
(dimension, chars, final_char, charset_symbol)
|
||
Lisp_Object dimension, chars, final_char, charset_symbol;
|
||
{
|
||
int charset;
|
||
|
||
CHECK_NUMBER (dimension, 0);
|
||
CHECK_NUMBER (chars, 1);
|
||
CHECK_NUMBER (final_char, 2);
|
||
CHECK_SYMBOL (charset_symbol, 3);
|
||
|
||
if (XINT (dimension) != 1 && XINT (dimension) != 2)
|
||
error ("Invalid DIMENSION %d, it should be 1 or 2", XINT (dimension));
|
||
if (XINT (chars) != 94 && XINT (chars) != 96)
|
||
error ("Invalid CHARS %d, it should be 94 or 96", XINT (chars));
|
||
if (XINT (final_char) < '0' || XFASTINT (final_char) > '~')
|
||
error ("Invalid FINAL-CHAR %c, it should be `0'..`~'", XINT (chars));
|
||
if ((charset = get_charset_id (charset_symbol)) < 0)
|
||
error ("Invalid charset %s", XSYMBOL (charset_symbol)->name->data);
|
||
|
||
ISO_CHARSET_TABLE (dimension, chars, final_char) = charset;
|
||
return Qnil;
|
||
}
|
||
|
||
/* Return number of different charsets in STR of length LEN. In
|
||
addition, for each found charset N, CHARSETS[N] is set 1. The
|
||
caller should allocate CHARSETS (MAX_CHARSET + 1 elements) in advance.
|
||
It may lookup a unification table TABLE if supplied. */
|
||
|
||
int
|
||
find_charset_in_str (str, len, charsets, table)
|
||
unsigned char *str;
|
||
int len, *charsets;
|
||
Lisp_Object table;
|
||
{
|
||
register int num = 0, c;
|
||
|
||
if (! CHAR_TABLE_P (table))
|
||
table = Qnil;
|
||
|
||
while (len > 0)
|
||
{
|
||
int bytes, charset;
|
||
c = *str;
|
||
|
||
if (c == LEADING_CODE_COMPOSITION)
|
||
{
|
||
int cmpchar_id = str_cmpchar_id (str, len);
|
||
GLYPH *glyph;
|
||
|
||
if (cmpchar_id > 0)
|
||
{
|
||
struct cmpchar_info *cmpcharp = cmpchar_table[cmpchar_id];
|
||
int i;
|
||
|
||
for (i = 0; i < cmpcharp->glyph_len; i++)
|
||
{
|
||
c = cmpcharp->glyph[i];
|
||
if (!NILP (table))
|
||
{
|
||
if ((c = unify_char (table, c, 0, 0, 0)) < 0)
|
||
c = cmpcharp->glyph[i];
|
||
}
|
||
if ((charset = CHAR_CHARSET (c)) < 0)
|
||
charset = CHARSET_ASCII;
|
||
if (!charsets[charset])
|
||
{
|
||
charsets[charset] = 1;
|
||
num += 1;
|
||
}
|
||
}
|
||
str += cmpcharp->len;
|
||
len -= cmpcharp->len;
|
||
continue;
|
||
}
|
||
|
||
charset = CHARSET_ASCII;
|
||
bytes = 1;
|
||
}
|
||
else
|
||
{
|
||
c = STRING_CHAR_AND_LENGTH (str, len, bytes);
|
||
if (! NILP (table))
|
||
{
|
||
int c1 = unify_char (table, c, 0, 0, 0);
|
||
if (c1 >= 0)
|
||
c = c1;
|
||
}
|
||
charset = CHAR_CHARSET (c);
|
||
}
|
||
|
||
if (!charsets[charset])
|
||
{
|
||
charsets[charset] = 1;
|
||
num += 1;
|
||
}
|
||
str += bytes;
|
||
len -= bytes;
|
||
}
|
||
return num;
|
||
}
|
||
|
||
DEFUN ("find-charset-region", Ffind_charset_region, Sfind_charset_region,
|
||
2, 3, 0,
|
||
"Return a list of charsets in the region between BEG and END.\n\
|
||
BEG and END are buffer positions.\n\
|
||
Optional arg TABLE if non-nil is a unification table to look up.")
|
||
(beg, end, table)
|
||
Lisp_Object beg, end, table;
|
||
{
|
||
int charsets[MAX_CHARSET + 1];
|
||
int from, from_byte, to, stop, stop_byte, i;
|
||
Lisp_Object val;
|
||
|
||
validate_region (&beg, &end);
|
||
from = XFASTINT (beg);
|
||
stop = to = XFASTINT (end);
|
||
|
||
if (from < GPT && GPT < to)
|
||
{
|
||
stop = GPT;
|
||
stop_byte = GPT_BYTE;
|
||
}
|
||
else
|
||
stop_byte = CHAR_TO_BYTE (stop);
|
||
|
||
from_byte = CHAR_TO_BYTE (from);
|
||
|
||
bzero (charsets, (MAX_CHARSET + 1) * sizeof (int));
|
||
while (1)
|
||
{
|
||
find_charset_in_str (BYTE_POS_ADDR (from_byte), stop_byte - from_byte,
|
||
charsets, table);
|
||
if (stop < to)
|
||
{
|
||
from = stop, from_byte = stop_byte;
|
||
stop = to, stop_byte = CHAR_TO_BYTE (stop);
|
||
}
|
||
else
|
||
break;
|
||
}
|
||
|
||
val = Qnil;
|
||
for (i = MAX_CHARSET; i >= 0; i--)
|
||
if (charsets[i])
|
||
val = Fcons (CHARSET_SYMBOL (i), val);
|
||
return val;
|
||
}
|
||
|
||
DEFUN ("find-charset-string", Ffind_charset_string, Sfind_charset_string,
|
||
1, 2, 0,
|
||
"Return a list of charsets in STR.\n\
|
||
Optional arg TABLE if non-nil is a unification table to look up.")
|
||
(str, table)
|
||
Lisp_Object str, table;
|
||
{
|
||
int charsets[MAX_CHARSET + 1];
|
||
int i;
|
||
Lisp_Object val;
|
||
|
||
CHECK_STRING (str, 0);
|
||
|
||
if (! STRING_MULTIBYTE (str))
|
||
return Qnil;
|
||
|
||
bzero (charsets, (MAX_CHARSET + 1) * sizeof (int));
|
||
find_charset_in_str (XSTRING (str)->data, XSTRING (str)->size_byte,
|
||
charsets, table);
|
||
val = Qnil;
|
||
for (i = MAX_CHARSET; i >= 0; i--)
|
||
if (charsets[i])
|
||
val = Fcons (CHARSET_SYMBOL (i), val);
|
||
return val;
|
||
}
|
||
|
||
DEFUN ("make-char-internal", Fmake_char_internal, Smake_char_internal, 1, 3, 0,
|
||
"")
|
||
(charset, code1, code2)
|
||
Lisp_Object charset, code1, code2;
|
||
{
|
||
CHECK_NUMBER (charset, 0);
|
||
|
||
if (NILP (code1))
|
||
XSETFASTINT (code1, 0);
|
||
else
|
||
CHECK_NUMBER (code1, 1);
|
||
if (NILP (code2))
|
||
XSETFASTINT (code2, 0);
|
||
else
|
||
CHECK_NUMBER (code2, 2);
|
||
|
||
if (!CHARSET_DEFINED_P (XINT (charset)))
|
||
error ("Invalid charset: %d", XINT (charset));
|
||
|
||
return make_number (MAKE_CHAR (XINT (charset), XINT (code1), XINT (code2)));
|
||
}
|
||
|
||
DEFUN ("split-char", Fsplit_char, Ssplit_char, 1, 1, 0,
|
||
"Return list of charset and one or two position-codes of CHAR.")
|
||
(ch)
|
||
Lisp_Object ch;
|
||
{
|
||
Lisp_Object val;
|
||
int charset, c1, c2;
|
||
|
||
CHECK_NUMBER (ch, 0);
|
||
SPLIT_CHAR (XFASTINT (ch), charset, c1, c2);
|
||
return (c2 >= 0
|
||
? Fcons (CHARSET_SYMBOL (charset),
|
||
Fcons (make_number (c1), Fcons (make_number (c2), Qnil)))
|
||
: Fcons (CHARSET_SYMBOL (charset), Fcons (make_number (c1), Qnil)));
|
||
}
|
||
|
||
DEFUN ("char-charset", Fchar_charset, Schar_charset, 1, 1, 0,
|
||
"Return charset of CHAR.")
|
||
(ch)
|
||
Lisp_Object ch;
|
||
{
|
||
CHECK_NUMBER (ch, 0);
|
||
|
||
return CHARSET_SYMBOL (CHAR_CHARSET (XINT (ch)));
|
||
}
|
||
|
||
DEFUN ("iso-charset", Fiso_charset, Siso_charset, 3, 3, 0,
|
||
"Return charset of ISO's specification DIMENSION, CHARS, and FINAL-CHAR.")
|
||
(dimension, chars, final_char)
|
||
Lisp_Object dimension, chars, final_char;
|
||
{
|
||
int charset;
|
||
|
||
CHECK_NUMBER (dimension, 0);
|
||
CHECK_NUMBER (chars, 1);
|
||
CHECK_NUMBER (final_char, 2);
|
||
|
||
if ((charset = ISO_CHARSET_TABLE (dimension, chars, final_char)) < 0)
|
||
return Qnil;
|
||
return CHARSET_SYMBOL (charset);
|
||
}
|
||
|
||
/* 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. Do not call this function directly,
|
||
instead use macro CHAR_VALID_P. */
|
||
int
|
||
char_valid_p (c, genericp)
|
||
int c, genericp;
|
||
{
|
||
int charset, c1, c2;
|
||
|
||
if (c < 0)
|
||
return 0;
|
||
if (SINGLE_BYTE_CHAR_P (c))
|
||
return 1;
|
||
SPLIT_NON_ASCII_CHAR (c, charset, c1, c2);
|
||
if (!CHARSET_VALID_P (charset))
|
||
return 0;
|
||
return (c < MIN_CHAR_COMPOSITION
|
||
? ((c & CHAR_FIELD1_MASK) /* i.e. dimension of C is two. */
|
||
? (genericp && c1 == 0 && c2 == 0
|
||
|| c1 >= 32 && c2 >= 32)
|
||
: (genericp && c1 == 0
|
||
|| c1 >= 32))
|
||
: c < MIN_CHAR_COMPOSITION + n_cmpchars);
|
||
}
|
||
|
||
DEFUN ("char-valid-p", Fchar_valid_p, Schar_valid_p, 1, 2, 0,
|
||
"Return t if OBJECT is a valid normal character.\n\
|
||
If optional arg GENERICP is non-nil, also return t if OBJECT is\n\
|
||
a valid generic character.")
|
||
(object, genericp)
|
||
Lisp_Object object, genericp;
|
||
{
|
||
if (! NATNUMP (object))
|
||
return Qnil;
|
||
return (CHAR_VALID_P (XFASTINT (object), !NILP (genericp)) ? Qt : Qnil);
|
||
}
|
||
|
||
DEFUN ("char-bytes", Fchar_bytes, Schar_bytes, 1, 1, 0,
|
||
"Return byte length of multi-byte form of CHAR.")
|
||
(ch)
|
||
Lisp_Object ch;
|
||
{
|
||
Lisp_Object val;
|
||
int bytes;
|
||
|
||
CHECK_NUMBER (ch, 0);
|
||
if (COMPOSITE_CHAR_P (XFASTINT (ch)))
|
||
{
|
||
unsigned int id = COMPOSITE_CHAR_ID (XFASTINT (ch));
|
||
|
||
bytes = (id < n_cmpchars ? cmpchar_table[id]->len : 1);
|
||
}
|
||
else
|
||
{
|
||
int charset = CHAR_CHARSET (XFASTINT (ch));
|
||
|
||
bytes = CHARSET_DEFINED_P (charset) ? CHARSET_BYTES (charset) : 1;
|
||
}
|
||
|
||
XSETFASTINT (val, bytes);
|
||
return val;
|
||
}
|
||
|
||
/* Return the width of character of which multi-byte form starts with
|
||
C. The width is measured by how many columns occupied on the
|
||
screen when displayed in the current buffer. */
|
||
|
||
#define ONE_BYTE_CHAR_WIDTH(c) \
|
||
(c < 0x20 \
|
||
? (c == '\t' \
|
||
? XFASTINT (current_buffer->tab_width) \
|
||
: (c == '\n' ? 0 : (NILP (current_buffer->ctl_arrow) ? 4 : 2))) \
|
||
: (c < 0x7f \
|
||
? 1 \
|
||
: (c == 0x7F \
|
||
? (NILP (current_buffer->ctl_arrow) ? 4 : 2) \
|
||
: ((! NILP (current_buffer->enable_multibyte_characters) \
|
||
&& BASE_LEADING_CODE_P (c)) \
|
||
? WIDTH_BY_CHAR_HEAD (c) \
|
||
: 4)))) \
|
||
|
||
|
||
DEFUN ("char-width", Fchar_width, Schar_width, 1, 1, 0,
|
||
"Return width of CHAR when displayed in the current buffer.\n\
|
||
The width is measured by how many columns it occupies on the screen.")
|
||
(ch)
|
||
Lisp_Object ch;
|
||
{
|
||
Lisp_Object val, disp;
|
||
int c;
|
||
struct Lisp_Char_Table *dp = buffer_display_table ();
|
||
|
||
CHECK_NUMBER (ch, 0);
|
||
|
||
c = XINT (ch);
|
||
|
||
/* Get the way the display table would display it. */
|
||
disp = dp ? DISP_CHAR_VECTOR (dp, c) : Qnil;
|
||
|
||
if (VECTORP (disp))
|
||
XSETINT (val, XVECTOR (disp)->size);
|
||
else if (SINGLE_BYTE_CHAR_P (c))
|
||
XSETINT (val, ONE_BYTE_CHAR_WIDTH (c));
|
||
else if (COMPOSITE_CHAR_P (c))
|
||
{
|
||
int id = COMPOSITE_CHAR_ID (XFASTINT (ch));
|
||
XSETFASTINT (val, (id < n_cmpchars ? cmpchar_table[id]->width : 0));
|
||
}
|
||
else
|
||
{
|
||
int charset = CHAR_CHARSET (c);
|
||
|
||
XSETFASTINT (val, CHARSET_WIDTH (charset));
|
||
}
|
||
return val;
|
||
}
|
||
|
||
/* Return width of string STR of length LEN when displayed in the
|
||
current buffer. The width is measured by how many columns it
|
||
occupies on the screen. */
|
||
|
||
int
|
||
strwidth (str, len)
|
||
unsigned char *str;
|
||
int len;
|
||
{
|
||
unsigned char *endp = str + len;
|
||
int width = 0;
|
||
struct Lisp_Char_Table *dp = buffer_display_table ();
|
||
|
||
while (str < endp)
|
||
{
|
||
if (*str == LEADING_CODE_COMPOSITION)
|
||
{
|
||
int id = str_cmpchar_id (str, endp - str);
|
||
|
||
if (id < 0)
|
||
{
|
||
width += 4;
|
||
str++;
|
||
}
|
||
else
|
||
{
|
||
width += cmpchar_table[id]->width;
|
||
str += cmpchar_table[id]->len;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
Lisp_Object disp;
|
||
int thiswidth;
|
||
int c = STRING_CHAR (str, endp - str);
|
||
|
||
/* Get the way the display table would display it. */
|
||
if (dp)
|
||
disp = DISP_CHAR_VECTOR (dp, c);
|
||
else
|
||
disp = Qnil;
|
||
|
||
if (VECTORP (disp))
|
||
thiswidth = XVECTOR (disp)->size;
|
||
else
|
||
thiswidth = ONE_BYTE_CHAR_WIDTH (*str);
|
||
|
||
width += thiswidth;
|
||
str += BYTES_BY_CHAR_HEAD (*str);
|
||
}
|
||
}
|
||
return width;
|
||
}
|
||
|
||
DEFUN ("string-width", Fstring_width, Sstring_width, 1, 1, 0,
|
||
"Return width of STRING when displayed in the current buffer.\n\
|
||
Width is measured by how many columns it occupies on the screen.\n\
|
||
When calculating width of a multibyte character in STRING,\n\
|
||
only the base leading-code is considered; the validity of\n\
|
||
the following bytes is not checked.")
|
||
(str)
|
||
Lisp_Object str;
|
||
{
|
||
Lisp_Object val;
|
||
|
||
CHECK_STRING (str, 0);
|
||
XSETFASTINT (val, strwidth (XSTRING (str)->data, XSTRING (str)->size));
|
||
return val;
|
||
}
|
||
|
||
DEFUN ("char-direction", Fchar_direction, Schar_direction, 1, 1, 0,
|
||
"Return the direction of CHAR.\n\
|
||
The returned value is 0 for left-to-right and 1 for right-to-left.")
|
||
(ch)
|
||
Lisp_Object ch;
|
||
{
|
||
int charset;
|
||
|
||
CHECK_NUMBER (ch, 0);
|
||
charset = CHAR_CHARSET (XFASTINT (ch));
|
||
if (!CHARSET_DEFINED_P (charset))
|
||
error ("Invalid character: %d", XINT (ch));
|
||
return CHARSET_TABLE_INFO (charset, CHARSET_DIRECTION_IDX);
|
||
}
|
||
|
||
DEFUN ("chars-in-region", Fchars_in_region, Schars_in_region, 2, 2, 0,
|
||
"Return number of characters between BEG and END.")
|
||
(beg, end)
|
||
Lisp_Object beg, end;
|
||
{
|
||
int from, to;
|
||
|
||
from = min (XFASTINT (beg), XFASTINT (end));
|
||
to = max (XFASTINT (beg), XFASTINT (end));
|
||
|
||
return to - from;
|
||
}
|
||
|
||
/* Return the number of characters in the NBYTES bytes at PTR.
|
||
This works by looking at the contents and checking for multibyte sequences.
|
||
However, if the current buffer has enable-multibyte-characters = nil,
|
||
we treat each byte as a character. */
|
||
|
||
int
|
||
chars_in_text (ptr, nbytes)
|
||
unsigned char *ptr;
|
||
int nbytes;
|
||
{
|
||
unsigned char *endp;
|
||
int chars;
|
||
|
||
/* current_buffer is null at early stages of Emacs initialization. */
|
||
if (current_buffer == 0
|
||
|| NILP (current_buffer->enable_multibyte_characters))
|
||
return nbytes;
|
||
|
||
endp = ptr + nbytes;
|
||
chars = 0;
|
||
|
||
while (ptr < endp)
|
||
{
|
||
if (*ptr == LEADING_CODE_COMPOSITION)
|
||
{
|
||
ptr++;
|
||
while (ptr < endp && ! CHAR_HEAD_P (*ptr)) ptr++;
|
||
}
|
||
else
|
||
ptr += BYTES_BY_CHAR_HEAD (*ptr);
|
||
chars++;
|
||
}
|
||
|
||
return chars;
|
||
}
|
||
|
||
/* Return the number of characters in the NBYTES bytes at PTR.
|
||
This works by looking at the contents and checking for multibyte sequences.
|
||
It ignores enable-multibyte-characters. */
|
||
|
||
int
|
||
multibyte_chars_in_text (ptr, nbytes)
|
||
unsigned char *ptr;
|
||
int nbytes;
|
||
{
|
||
unsigned char *endp;
|
||
int chars;
|
||
|
||
endp = ptr + nbytes;
|
||
chars = 0;
|
||
|
||
while (ptr < endp)
|
||
{
|
||
if (*ptr == LEADING_CODE_COMPOSITION)
|
||
{
|
||
ptr++;
|
||
while (ptr < endp && ! CHAR_HEAD_P (*ptr)) ptr++;
|
||
}
|
||
else
|
||
ptr += BYTES_BY_CHAR_HEAD (*ptr);
|
||
chars++;
|
||
}
|
||
|
||
return chars;
|
||
}
|
||
|
||
DEFUN ("string", Fstring, Sstring, 1, MANY, 0,
|
||
"Concatenate all the argument characters and make the result a string.")
|
||
(n, args)
|
||
int n;
|
||
Lisp_Object *args;
|
||
{
|
||
int i;
|
||
unsigned char *buf
|
||
= (unsigned char *) alloca (MAX_LENGTH_OF_MULTI_BYTE_FORM * n);
|
||
unsigned char *p = buf;
|
||
Lisp_Object val;
|
||
|
||
for (i = 0; i < n; i++)
|
||
{
|
||
int c, len;
|
||
unsigned char *str;
|
||
|
||
if (!INTEGERP (args[i]))
|
||
CHECK_NUMBER (args[i], 0);
|
||
c = XINT (args[i]);
|
||
len = CHAR_STRING (c, p, str);
|
||
if (p != str)
|
||
/* C is a composite character. */
|
||
bcopy (str, p, len);
|
||
p += len;
|
||
}
|
||
|
||
val = make_multibyte_string (buf, n, p - buf);
|
||
return val;
|
||
}
|
||
|
||
#endif /* emacs */
|
||
|
||
/*** Composite characters staffs ***/
|
||
|
||
/* Each composite character is identified by CMPCHAR-ID which is
|
||
assigned when Emacs needs the character code of the composite
|
||
character (e.g. when displaying it on the screen). See the
|
||
document "GENERAL NOTE on COMPOSITE CHARACTER" in `charset.h' how a
|
||
composite character is represented in Emacs. */
|
||
|
||
/* If `static' is defined, it means that it is defined to null string. */
|
||
#ifndef static
|
||
/* The following function is copied from lread.c. */
|
||
static int
|
||
hash_string (ptr, len)
|
||
unsigned char *ptr;
|
||
int len;
|
||
{
|
||
register unsigned char *p = ptr;
|
||
register unsigned char *end = p + len;
|
||
register unsigned char c;
|
||
register int hash = 0;
|
||
|
||
while (p != end)
|
||
{
|
||
c = *p++;
|
||
if (c >= 0140) c -= 40;
|
||
hash = ((hash<<3) + (hash>>28) + c);
|
||
}
|
||
return hash & 07777777777;
|
||
}
|
||
#endif
|
||
|
||
#define CMPCHAR_HASH_TABLE_SIZE 0xFFF
|
||
|
||
static int *cmpchar_hash_table[CMPCHAR_HASH_TABLE_SIZE];
|
||
|
||
/* Each element of `cmpchar_hash_table' is a pointer to an array of
|
||
integer, where the 1st element is the size of the array, the 2nd
|
||
element is how many elements are actually used in the array, and
|
||
the remaining elements are CMPCHAR-IDs of composite characters of
|
||
the same hash value. */
|
||
#define CMPCHAR_HASH_SIZE(table) table[0]
|
||
#define CMPCHAR_HASH_USED(table) table[1]
|
||
#define CMPCHAR_HASH_CMPCHAR_ID(table, i) table[i]
|
||
|
||
/* Return CMPCHAR-ID of the composite character in STR of the length
|
||
LEN. If the composite character has not yet been registered,
|
||
register it in `cmpchar_table' and assign new CMPCHAR-ID. This
|
||
is the sole function for assigning CMPCHAR-ID. */
|
||
int
|
||
str_cmpchar_id (str, len)
|
||
unsigned char *str;
|
||
int len;
|
||
{
|
||
int hash_idx, *hashp;
|
||
unsigned char *buf;
|
||
int embedded_rule; /* 1 if composition rule is embedded. */
|
||
int chars; /* number of components. */
|
||
int i;
|
||
struct cmpchar_info *cmpcharp;
|
||
|
||
if (len < 5)
|
||
/* Any composite char have at least 3-byte length. */
|
||
return -1;
|
||
|
||
/* The second byte 0xFF means compostion rule is embedded. */
|
||
embedded_rule = (str[1] == 0xFF);
|
||
|
||
/* At first, get the actual length of the composite character. */
|
||
{
|
||
unsigned char *p, *endp = str + 1, *lastp = str + len;
|
||
int bytes;
|
||
|
||
while (endp < lastp && ! CHAR_HEAD_P (*endp)) endp++;
|
||
chars = 0;
|
||
p = str + 1 + embedded_rule;
|
||
while (p < endp)
|
||
{
|
||
/* No need of checking if *P is 0xA0 because
|
||
BYTES_BY_CHAR_HEAD (0x80) surely returns 2. */
|
||
p += (bytes = BYTES_BY_CHAR_HEAD (*p - 0x20) + embedded_rule);
|
||
chars++;
|
||
}
|
||
len = (p -= embedded_rule) - str;
|
||
if (p > endp)
|
||
len -= - bytes, chars--;
|
||
|
||
if (chars < 2 || chars > MAX_COMPONENT_COUNT)
|
||
/* Invalid number of components. */
|
||
return -1;
|
||
}
|
||
hash_idx = hash_string (str, len) % CMPCHAR_HASH_TABLE_SIZE;
|
||
hashp = cmpchar_hash_table[hash_idx];
|
||
|
||
/* Then, look into the hash table. */
|
||
if (hashp != NULL)
|
||
/* Find the correct one among composite characters of the same
|
||
hash value. */
|
||
for (i = 2; i < CMPCHAR_HASH_USED (hashp); i++)
|
||
{
|
||
cmpcharp = cmpchar_table[CMPCHAR_HASH_CMPCHAR_ID (hashp, i)];
|
||
if (len == cmpcharp->len
|
||
&& ! bcmp (str, cmpcharp->data, len))
|
||
return CMPCHAR_HASH_CMPCHAR_ID (hashp, i);
|
||
}
|
||
|
||
/* We have to register the composite character in cmpchar_table. */
|
||
if (n_cmpchars > (CHAR_FIELD2_MASK | CHAR_FIELD3_MASK))
|
||
/* No, we have no more room for a new composite character. */
|
||
return -1;
|
||
|
||
/* Make the entry in hash table. */
|
||
if (hashp == NULL)
|
||
{
|
||
/* Make a table for 8 composite characters initially. */
|
||
hashp = (cmpchar_hash_table[hash_idx]
|
||
= (int *) xmalloc (sizeof (int) * (2 + 8)));
|
||
CMPCHAR_HASH_SIZE (hashp) = 10;
|
||
CMPCHAR_HASH_USED (hashp) = 2;
|
||
}
|
||
else if (CMPCHAR_HASH_USED (hashp) >= CMPCHAR_HASH_SIZE (hashp))
|
||
{
|
||
CMPCHAR_HASH_SIZE (hashp) += 8;
|
||
hashp = (cmpchar_hash_table[hash_idx]
|
||
= (int *) xrealloc (hashp,
|
||
sizeof (int) * CMPCHAR_HASH_SIZE (hashp)));
|
||
}
|
||
CMPCHAR_HASH_CMPCHAR_ID (hashp, CMPCHAR_HASH_USED (hashp)) = n_cmpchars;
|
||
CMPCHAR_HASH_USED (hashp)++;
|
||
|
||
/* Set information of the composite character in cmpchar_table. */
|
||
if (cmpchar_table_size == 0)
|
||
{
|
||
/* This is the first composite character to be registered. */
|
||
cmpchar_table_size = 256;
|
||
cmpchar_table
|
||
= (struct cmpchar_info **) xmalloc (sizeof (cmpchar_table[0])
|
||
* cmpchar_table_size);
|
||
}
|
||
else if (cmpchar_table_size <= n_cmpchars)
|
||
{
|
||
cmpchar_table_size += 256;
|
||
cmpchar_table
|
||
= (struct cmpchar_info **) xrealloc (cmpchar_table,
|
||
sizeof (cmpchar_table[0])
|
||
* cmpchar_table_size);
|
||
}
|
||
|
||
cmpcharp = (struct cmpchar_info *) xmalloc (sizeof (struct cmpchar_info));
|
||
|
||
cmpcharp->len = len;
|
||
cmpcharp->data = (unsigned char *) xmalloc (len + 1);
|
||
bcopy (str, cmpcharp->data, len);
|
||
cmpcharp->data[len] = 0;
|
||
cmpcharp->glyph_len = chars;
|
||
cmpcharp->glyph = (GLYPH *) xmalloc (sizeof (GLYPH) * chars);
|
||
if (embedded_rule)
|
||
{
|
||
cmpcharp->cmp_rule = (unsigned char *) xmalloc (chars);
|
||
cmpcharp->col_offset = (float *) xmalloc (sizeof (float) * chars);
|
||
}
|
||
else
|
||
{
|
||
cmpcharp->cmp_rule = NULL;
|
||
cmpcharp->col_offset = NULL;
|
||
}
|
||
|
||
/* Setup GLYPH data and composition rules (if any) so as not to make
|
||
them every time on displaying. */
|
||
{
|
||
unsigned char *bufp;
|
||
int width;
|
||
float leftmost = 0.0, rightmost = 1.0;
|
||
|
||
if (embedded_rule)
|
||
/* At first, col_offset[N] is set to relative to col_offset[0]. */
|
||
cmpcharp->col_offset[0] = 0;
|
||
|
||
for (i = 0, bufp = cmpcharp->data + 1; i < chars; i++)
|
||
{
|
||
if (embedded_rule)
|
||
cmpcharp->cmp_rule[i] = *bufp++;
|
||
|
||
if (*bufp == 0xA0) /* This is an ASCII character. */
|
||
{
|
||
cmpcharp->glyph[i] = FAST_MAKE_GLYPH ((*++bufp & 0x7F), 0);
|
||
width = 1;
|
||
bufp++;
|
||
}
|
||
else /* Multibyte character. */
|
||
{
|
||
/* Make `bufp' point normal multi-byte form temporally. */
|
||
*bufp -= 0x20;
|
||
cmpcharp->glyph[i]
|
||
= FAST_MAKE_GLYPH (string_to_non_ascii_char (bufp, 4, 0), 0);
|
||
width = WIDTH_BY_CHAR_HEAD (*bufp);
|
||
*bufp += 0x20;
|
||
bufp += BYTES_BY_CHAR_HEAD (*bufp - 0x20);
|
||
}
|
||
|
||
if (embedded_rule && i > 0)
|
||
{
|
||
/* Reference points (global_ref and new_ref) are
|
||
encoded as below:
|
||
|
||
0--1--2 -- ascent
|
||
| |
|
||
| |
|
||
| 4 -+--- center
|
||
-- 3 5 -- baseline
|
||
| |
|
||
6--7--8 -- descent
|
||
|
||
Now, we calculate the column offset of the new glyph
|
||
from the left edge of the first glyph. This can avoid
|
||
the same calculation everytime displaying this
|
||
composite character. */
|
||
|
||
/* Reference points of global glyph and new glyph. */
|
||
int global_ref = (cmpcharp->cmp_rule[i] - 0xA0) / 9;
|
||
int new_ref = (cmpcharp->cmp_rule[i] - 0xA0) % 9;
|
||
/* Column offset relative to the first glyph. */
|
||
float left = (leftmost
|
||
+ (global_ref % 3) * (rightmost - leftmost) / 2.0
|
||
- (new_ref % 3) * width / 2.0);
|
||
|
||
cmpcharp->col_offset[i] = left;
|
||
if (left < leftmost)
|
||
leftmost = left;
|
||
if (left + width > rightmost)
|
||
rightmost = left + width;
|
||
}
|
||
else
|
||
{
|
||
if (width > rightmost)
|
||
rightmost = width;
|
||
}
|
||
}
|
||
if (embedded_rule)
|
||
{
|
||
/* Now col_offset[N] are relative to the left edge of the
|
||
first component. Make them relative to the left edge of
|
||
overall glyph. */
|
||
for (i = 0; i < chars; i++)
|
||
cmpcharp->col_offset[i] -= leftmost;
|
||
/* Make rightmost holds width of overall glyph. */
|
||
rightmost -= leftmost;
|
||
}
|
||
|
||
cmpcharp->width = rightmost;
|
||
if (cmpcharp->width < rightmost)
|
||
/* To get a ceiling integer value. */
|
||
cmpcharp->width++;
|
||
}
|
||
|
||
cmpchar_table[n_cmpchars] = cmpcharp;
|
||
|
||
return n_cmpchars++;
|
||
}
|
||
|
||
/* Return the Nth element of the composite character C. */
|
||
int
|
||
cmpchar_component (c, n)
|
||
unsigned int c, n;
|
||
{
|
||
int id = COMPOSITE_CHAR_ID (c);
|
||
|
||
if (id >= n_cmpchars /* C is not a valid composite character. */
|
||
|| n >= cmpchar_table[id]->glyph_len) /* No such component. */
|
||
return -1;
|
||
/* No face data is stored in glyph code. */
|
||
return ((int) (cmpchar_table[id]->glyph[n]));
|
||
}
|
||
|
||
DEFUN ("cmpcharp", Fcmpcharp, Scmpcharp, 1, 1, 0,
|
||
"T if CHAR is a composite character.")
|
||
(ch)
|
||
Lisp_Object ch;
|
||
{
|
||
CHECK_NUMBER (ch, 0);
|
||
return (COMPOSITE_CHAR_P (XINT (ch)) ? Qt : Qnil);
|
||
}
|
||
|
||
DEFUN ("composite-char-component", Fcmpchar_component, Scmpchar_component,
|
||
2, 2, 0,
|
||
"Return the IDXth component character of composite character CHARACTER.")
|
||
(character, idx)
|
||
Lisp_Object character, idx;
|
||
{
|
||
int c;
|
||
|
||
CHECK_NUMBER (character, 0);
|
||
CHECK_NUMBER (idx, 1);
|
||
|
||
if ((c = cmpchar_component (XINT (character), XINT (idx))) < 0)
|
||
args_out_of_range (character, idx);
|
||
|
||
return make_number (c);
|
||
}
|
||
|
||
DEFUN ("composite-char-composition-rule", Fcmpchar_cmp_rule, Scmpchar_cmp_rule,
|
||
2, 2, 0,
|
||
"Return the Nth composition rule embedded in composite character CHARACTER.\n\
|
||
The returned rule is for composing the Nth component\n\
|
||
on the (N-1)th component. If N is 0, the returned value is always 255.")
|
||
(character, n)
|
||
Lisp_Object character, n;
|
||
{
|
||
int id, i;
|
||
|
||
CHECK_NUMBER (character, 0);
|
||
CHECK_NUMBER (n, 1);
|
||
|
||
id = COMPOSITE_CHAR_ID (XINT (character));
|
||
if (id < 0 || id >= n_cmpchars)
|
||
error ("Invalid composite character: %d", XINT (character));
|
||
i = XINT (n);
|
||
if (i > cmpchar_table[id]->glyph_len)
|
||
args_out_of_range (character, n);
|
||
|
||
return make_number (cmpchar_table[id]->cmp_rule[i]);
|
||
}
|
||
|
||
DEFUN ("composite-char-composition-rule-p", Fcmpchar_cmp_rule_p,
|
||
Scmpchar_cmp_rule_p, 1, 1, 0,
|
||
"Return non-nil if composite character CHARACTER contains a embedded rule.")
|
||
(character)
|
||
Lisp_Object character;
|
||
{
|
||
int id;
|
||
|
||
CHECK_NUMBER (character, 0);
|
||
id = COMPOSITE_CHAR_ID (XINT (character));
|
||
if (id < 0 || id >= n_cmpchars)
|
||
error ("Invalid composite character: %d", XINT (character));
|
||
|
||
return (cmpchar_table[id]->cmp_rule ? Qt : Qnil);
|
||
}
|
||
|
||
DEFUN ("composite-char-component-count", Fcmpchar_cmp_count,
|
||
Scmpchar_cmp_count, 1, 1, 0,
|
||
"Return number of compoents of composite character CHARACTER.")
|
||
(character)
|
||
Lisp_Object character;
|
||
{
|
||
int id;
|
||
|
||
CHECK_NUMBER (character, 0);
|
||
id = COMPOSITE_CHAR_ID (XINT (character));
|
||
if (id < 0 || id >= n_cmpchars)
|
||
error ("Invalid composite character: %d", XINT (character));
|
||
|
||
return (make_number (cmpchar_table[id]->glyph_len));
|
||
}
|
||
|
||
DEFUN ("compose-string", Fcompose_string, Scompose_string,
|
||
1, 1, 0,
|
||
"Return one char string composed from all characters in STRING.")
|
||
(str)
|
||
Lisp_Object str;
|
||
{
|
||
unsigned char buf[MAX_LENGTH_OF_MULTI_BYTE_FORM], *p, *pend, *ptemp;
|
||
int len, i;
|
||
|
||
CHECK_STRING (str, 0);
|
||
|
||
buf[0] = LEADING_CODE_COMPOSITION;
|
||
p = XSTRING (str)->data;
|
||
pend = p + XSTRING (str)->size_byte;
|
||
i = 1;
|
||
while (p < pend)
|
||
{
|
||
if (*p < 0x20 || *p == 127) /* control code */
|
||
error ("Invalid component character: %d", *p);
|
||
else if (*p < 0x80) /* ASCII */
|
||
{
|
||
if (i + 2 >= MAX_LENGTH_OF_MULTI_BYTE_FORM)
|
||
error ("Too long string to be composed: %s", XSTRING (str)->data);
|
||
/* Prepend an ASCII charset indicator 0xA0, set MSB of the
|
||
code itself. */
|
||
buf[i++] = 0xA0;
|
||
buf[i++] = *p++ + 0x80;
|
||
}
|
||
else if (*p == LEADING_CODE_COMPOSITION) /* composite char */
|
||
{
|
||
/* Already composed. Eliminate the heading
|
||
LEADING_CODE_COMPOSITION, keep the remaining bytes
|
||
unchanged. */
|
||
p++;
|
||
ptemp = p;
|
||
while (! CHAR_HEAD_P (*p)) p++;
|
||
if (i + (p - ptemp) >= MAX_LENGTH_OF_MULTI_BYTE_FORM)
|
||
error ("Too long string to be composed: %s", XSTRING (str)->data);
|
||
bcopy (ptemp, buf + i, p - ptemp);
|
||
i += p - ptemp;
|
||
}
|
||
else /* multibyte char */
|
||
{
|
||
/* Add 0x20 to the base leading-code, keep the remaining
|
||
bytes unchanged. */
|
||
len = BYTES_BY_CHAR_HEAD (*p);
|
||
if (i + len >= MAX_LENGTH_OF_MULTI_BYTE_FORM)
|
||
error ("Too long string to be composed: %s", XSTRING (str)->data);
|
||
bcopy (p, buf + i, len);
|
||
buf[i] += 0x20;
|
||
p += len, i += len;
|
||
}
|
||
}
|
||
|
||
if (i < 5)
|
||
/* STR contains only one character, which can't be composed. */
|
||
error ("Too short string to be composed: %s", XSTRING (str)->data);
|
||
|
||
return make_multibyte_string (buf, 1, i);
|
||
}
|
||
|
||
|
||
charset_id_internal (charset_name)
|
||
char *charset_name;
|
||
{
|
||
Lisp_Object val = Fget (intern (charset_name), Qcharset);
|
||
|
||
if (!VECTORP (val))
|
||
error ("Charset %s is not defined", charset_name);
|
||
|
||
return (XINT (XVECTOR (val)->contents[0]));
|
||
}
|
||
|
||
DEFUN ("setup-special-charsets", Fsetup_special_charsets,
|
||
Ssetup_special_charsets, 0, 0, 0, "Internal use only.")
|
||
()
|
||
{
|
||
charset_latin_iso8859_1 = charset_id_internal ("latin-iso8859-1");
|
||
charset_jisx0208_1978 = charset_id_internal ("japanese-jisx0208-1978");
|
||
charset_jisx0208 = charset_id_internal ("japanese-jisx0208");
|
||
charset_katakana_jisx0201 = charset_id_internal ("katakana-jisx0201");
|
||
charset_latin_jisx0201 = charset_id_internal ("latin-jisx0201");
|
||
charset_big5_1 = charset_id_internal ("chinese-big5-1");
|
||
charset_big5_2 = charset_id_internal ("chinese-big5-2");
|
||
return Qnil;
|
||
}
|
||
|
||
init_charset_once ()
|
||
{
|
||
int i, j, k;
|
||
|
||
staticpro (&Vcharset_table);
|
||
staticpro (&Vcharset_symbol_table);
|
||
|
||
/* This has to be done here, before we call Fmake_char_table. */
|
||
Qcharset_table = intern ("charset-table");
|
||
staticpro (&Qcharset_table);
|
||
|
||
/* Intern this now in case it isn't already done.
|
||
Setting this variable twice is harmless.
|
||
But don't staticpro it here--that is done in alloc.c. */
|
||
Qchar_table_extra_slots = intern ("char-table-extra-slots");
|
||
|
||
/* Now we are ready to set up this property, so we can
|
||
create the charset table. */
|
||
Fput (Qcharset_table, Qchar_table_extra_slots, make_number (0));
|
||
Vcharset_table = Fmake_char_table (Qcharset_table, Qnil);
|
||
|
||
Vcharset_symbol_table = Fmake_vector (make_number (MAX_CHARSET + 1), Qnil);
|
||
|
||
/* Setup tables. */
|
||
for (i = 0; i < 2; i++)
|
||
for (j = 0; j < 2; j++)
|
||
for (k = 0; k < 128; k++)
|
||
iso_charset_table [i][j][k] = -1;
|
||
|
||
bzero (cmpchar_hash_table, sizeof cmpchar_hash_table);
|
||
cmpchar_table_size = n_cmpchars = 0;
|
||
|
||
for (i = 0; i < 256; i++)
|
||
BYTES_BY_CHAR_HEAD (i) = 1;
|
||
BYTES_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_11) = 3;
|
||
BYTES_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_12) = 3;
|
||
BYTES_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_21) = 4;
|
||
BYTES_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_22) = 4;
|
||
/* The following doesn't reflect the actual bytes, but just to tell
|
||
that it is a start of a multibyte character. */
|
||
BYTES_BY_CHAR_HEAD (LEADING_CODE_COMPOSITION) = 2;
|
||
|
||
for (i = 0; i < 128; i++)
|
||
WIDTH_BY_CHAR_HEAD (i) = 1;
|
||
for (; i < 256; i++)
|
||
WIDTH_BY_CHAR_HEAD (i) = 4;
|
||
WIDTH_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_11) = 1;
|
||
WIDTH_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_12) = 2;
|
||
WIDTH_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_21) = 1;
|
||
WIDTH_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_22) = 2;
|
||
}
|
||
|
||
#ifdef emacs
|
||
|
||
syms_of_charset ()
|
||
{
|
||
Qascii = intern ("ascii");
|
||
staticpro (&Qascii);
|
||
|
||
Qcharset = intern ("charset");
|
||
staticpro (&Qcharset);
|
||
|
||
/* Define ASCII charset now. */
|
||
update_charset_table (make_number (CHARSET_ASCII),
|
||
make_number (1), make_number (94),
|
||
make_number (1),
|
||
make_number (0),
|
||
make_number ('B'),
|
||
make_number (0),
|
||
build_string ("ASCII"),
|
||
build_string ("ASCII"),
|
||
build_string ("ASCII (ISO646 IRV)"));
|
||
CHARSET_SYMBOL (CHARSET_ASCII) = Qascii;
|
||
Fput (Qascii, Qcharset, CHARSET_TABLE_ENTRY (CHARSET_ASCII));
|
||
|
||
Qcomposition = intern ("composition");
|
||
staticpro (&Qcomposition);
|
||
CHARSET_SYMBOL (CHARSET_COMPOSITION) = Qcomposition;
|
||
|
||
defsubr (&Sdefine_charset);
|
||
defsubr (&Sget_unused_iso_final_char);
|
||
defsubr (&Sdeclare_equiv_charset);
|
||
defsubr (&Sfind_charset_region);
|
||
defsubr (&Sfind_charset_string);
|
||
defsubr (&Smake_char_internal);
|
||
defsubr (&Ssplit_char);
|
||
defsubr (&Schar_charset);
|
||
defsubr (&Siso_charset);
|
||
defsubr (&Schar_valid_p);
|
||
defsubr (&Schar_bytes);
|
||
defsubr (&Schar_width);
|
||
defsubr (&Sstring_width);
|
||
defsubr (&Schar_direction);
|
||
defsubr (&Schars_in_region);
|
||
defsubr (&Sstring);
|
||
defsubr (&Scmpcharp);
|
||
defsubr (&Scmpchar_component);
|
||
defsubr (&Scmpchar_cmp_rule);
|
||
defsubr (&Scmpchar_cmp_rule_p);
|
||
defsubr (&Scmpchar_cmp_count);
|
||
defsubr (&Scompose_string);
|
||
defsubr (&Ssetup_special_charsets);
|
||
|
||
DEFVAR_LISP ("charset-list", &Vcharset_list,
|
||
"List of charsets ever defined.");
|
||
Vcharset_list = Fcons (Qascii, Qnil);
|
||
|
||
DEFVAR_LISP ("character-unification-table-vector",
|
||
&Vcharacter_unification_table_vector,
|
||
"Vector of cons cell of a symbol and unification table ever defined.\n\
|
||
An ID of a unification table is an index of this vector.");
|
||
Vcharacter_unification_table_vector = Fmake_vector (make_number (16), Qnil);
|
||
|
||
DEFVAR_INT ("leading-code-composition", &leading_code_composition,
|
||
"Leading-code of composite characters.");
|
||
leading_code_composition = LEADING_CODE_COMPOSITION;
|
||
|
||
DEFVAR_INT ("leading-code-private-11", &leading_code_private_11,
|
||
"Leading-code of private TYPE9N charset of column-width 1.");
|
||
leading_code_private_11 = LEADING_CODE_PRIVATE_11;
|
||
|
||
DEFVAR_INT ("leading-code-private-12", &leading_code_private_12,
|
||
"Leading-code of private TYPE9N charset of column-width 2.");
|
||
leading_code_private_12 = LEADING_CODE_PRIVATE_12;
|
||
|
||
DEFVAR_INT ("leading-code-private-21", &leading_code_private_21,
|
||
"Leading-code of private TYPE9Nx9N charset of column-width 1.");
|
||
leading_code_private_21 = LEADING_CODE_PRIVATE_21;
|
||
|
||
DEFVAR_INT ("leading-code-private-22", &leading_code_private_22,
|
||
"Leading-code of private TYPE9Nx9N charset of column-width 2.");
|
||
leading_code_private_22 = LEADING_CODE_PRIVATE_22;
|
||
|
||
DEFVAR_INT ("nonascii-insert-offset", &nonascii_insert_offset,
|
||
"Offset to add to a non-ascii code 0200...0377 when inserting it.\n\
|
||
This applies only when multibyte characters are enabled, and it serves\n\
|
||
to convert a Latin-1 or similar 8-bit character code to the corresponding\n\
|
||
Emacs character code.");
|
||
nonascii_insert_offset = 0;
|
||
|
||
DEFVAR_INT ("min-composite-char", &min_composite_char,
|
||
"Minimum character code of a composite character.");
|
||
min_composite_char = MIN_CHAR_COMPOSITION;
|
||
}
|
||
|
||
#endif /* emacs */
|