| 1 | /* Declarations having to do with Emacs category tables. |
| 2 | Copyright (C) 1995 Electrotechnical Laboratory, JAPAN. |
| 3 | Licensed to the Free Software Foundation. |
| 4 | |
| 5 | This file is part of GNU Emacs. |
| 6 | |
| 7 | GNU Emacs is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GNU Emacs is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GNU Emacs; see the file COPYING. If not, write to |
| 19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | |
| 23 | /* We introduce here three types of object: category, category set, |
| 24 | and category table. |
| 25 | |
| 26 | A category is like syntax but differs in the following points: |
| 27 | |
| 28 | o A category is represented by a mnemonic character of the range |
| 29 | ` '(32)..`~'(126) (printable ASCII characters). |
| 30 | |
| 31 | o A category is not exclusive, i.e. a character has multiple |
| 32 | categories (category set). Of course, there's a case that a |
| 33 | category set is empty, i.e. the character has no category. |
| 34 | |
| 35 | o In addition to the predefined categories, a user can define new |
| 36 | categories. Total number of categories is limited to 95. |
| 37 | |
| 38 | A category set is a set of categories represented by Lisp |
| 39 | bool-vector of length 128 (only elements of 31th through 126th |
| 40 | are used). |
| 41 | |
| 42 | A category table is like syntax-table, represented by a Lisp |
| 43 | char-table. The contents are category sets or nil. It has two |
| 44 | extra slots, for a vector of doc string of each category and a |
| 45 | version number. |
| 46 | |
| 47 | The first extra slot is a vector of doc strings of categories, the |
| 48 | length is 95. The Nth element corresponding to the category N+32. |
| 49 | |
| 50 | The second extra slot is a version number of the category table. |
| 51 | But, for the moment, we are not using this slot. */ |
| 52 | |
| 53 | #define CATEGORYP(x) \ |
| 54 | (INTEGERP ((x)) && XFASTINT ((x)) >= 0x20 && XFASTINT ((x)) <= 0x7E) |
| 55 | |
| 56 | #define CHECK_CATEGORY(x) \ |
| 57 | do { \ |
| 58 | if (!CATEGORYP ((x))) x = wrong_type_argument (Qcategoryp, (x)); \ |
| 59 | } while (0) |
| 60 | |
| 61 | #define XCATEGORY_SET XBOOL_VECTOR |
| 62 | |
| 63 | #define CATEGORY_SET_P(x) \ |
| 64 | (BOOL_VECTOR_P ((x)) && (EMACS_INT) (XBOOL_VECTOR ((x))->size) == 128) |
| 65 | |
| 66 | /* Return a new empty category set. */ |
| 67 | #define MAKE_CATEGORY_SET (Fmake_bool_vector (make_number (128), Qnil)) |
| 68 | |
| 69 | /* Make CATEGORY_SET includes (if VAL is t) or excludes (if VAL is |
| 70 | nil) CATEGORY. */ |
| 71 | #define SET_CATEGORY_SET(category_set, category, val) \ |
| 72 | (Faset (category_set, category, val)) |
| 73 | |
| 74 | #define CHECK_CATEGORY_SET(x) \ |
| 75 | do { \ |
| 76 | if (!CATEGORY_SET_P ((x))) x = wrong_type_argument (Qcategorysetp, (x)); \ |
| 77 | } while (0) |
| 78 | |
| 79 | /* Return 1 if CATEGORY_SET contains CATEGORY, else return 0. |
| 80 | The faster version of `!NILP (Faref (category_set, category))'. */ |
| 81 | #define CATEGORY_MEMBER(category, category_set) \ |
| 82 | (XCATEGORY_SET (category_set)->data[(category) / 8] \ |
| 83 | & (1 << ((category) % 8))) |
| 84 | |
| 85 | /* Temporary internal variable used in macro CHAR_HAS_CATEGORY. */ |
| 86 | extern Lisp_Object _temp_category_set; |
| 87 | |
| 88 | /* Return 1 if category set of CH contains CATEGORY, elt return 0. */ |
| 89 | #define CHAR_HAS_CATEGORY(ch, category) \ |
| 90 | (_temp_category_set = CATEGORY_SET (ch), \ |
| 91 | CATEGORY_MEMBER (category, _temp_category_set)) |
| 92 | |
| 93 | /* The standard category table is stored where it will automatically |
| 94 | be used in all new buffers. */ |
| 95 | #define Vstandard_category_table buffer_defaults.category_table |
| 96 | |
| 97 | /* Return the category set of character C in the current category table. */ |
| 98 | #ifdef __GNUC__ |
| 99 | #define CATEGORY_SET(c) \ |
| 100 | ({ Lisp_Object table = current_buffer->category_table; \ |
| 101 | Lisp_Object temp; \ |
| 102 | if ((c) < CHAR_TABLE_SINGLE_BYTE_SLOTS) \ |
| 103 | while (NILP (temp = XCHAR_TABLE (table)->contents[(unsigned char) c]) \ |
| 104 | && NILP (temp = XCHAR_TABLE (table)->defalt)) \ |
| 105 | table = XCHAR_TABLE (table)->parent; \ |
| 106 | else \ |
| 107 | temp = Faref (table, make_number (c)); \ |
| 108 | temp; }) |
| 109 | #else |
| 110 | #define CATEGORY_SET(c) \ |
| 111 | Faref (current_buffer->category_table, make_number (c)) |
| 112 | #endif |
| 113 | |
| 114 | /* Return the doc string of CATEGORY in category table TABLE. */ |
| 115 | #define CATEGORY_DOCSTRING(table, category) \ |
| 116 | XVECTOR (Fchar_table_extra_slot (table, make_number (0)))->contents[(category) - ' '] |
| 117 | |
| 118 | /* Return the version number of category table TABLE. Not used for |
| 119 | the moment. */ |
| 120 | #define CATEGORY_TABLE_VERSION (table) \ |
| 121 | Fchar_table_extra_slot (table, make_number (1)) |
| 122 | |
| 123 | /* Return 1 if there is a word boundary between two word-constituent |
| 124 | characters C1 and C2 if they appear in this order, else return 0. |
| 125 | There is no word boundary between two word-constituent ASCII |
| 126 | characters. */ |
| 127 | #define WORD_BOUNDARY_P(c1, c2) \ |
| 128 | (!(SINGLE_BYTE_CHAR_P (c1) && SINGLE_BYTE_CHAR_P (c2)) \ |
| 129 | && word_boundary_p (c1, c2)) |
| 130 | |
| 131 | extern int word_boundary_p P_ ((int, int)); |