| 1 | /* Declarations having to do with Emacs category tables. |
| 2 | Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, |
| 3 | 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 |
| 4 | National Institute of Advanced Industrial Science and Technology (AIST) |
| 5 | Registration Number H14PRO021 |
| 6 | Copyright (C) 2003 |
| 7 | National Institute of Advanced Industrial Science and Technology (AIST) |
| 8 | Registration Number H13PRO009 |
| 9 | |
| 10 | This file is part of GNU Emacs. |
| 11 | |
| 12 | GNU Emacs is free software: you can redistribute it and/or modify |
| 13 | it under the terms of the GNU General Public License as published by |
| 14 | the Free Software Foundation, either version 3 of the License, or |
| 15 | (at your option) any later version. |
| 16 | |
| 17 | GNU Emacs is distributed in the hope that it will be useful, |
| 18 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | GNU General Public License for more details. |
| 21 | |
| 22 | You should have received a copy of the GNU General Public License |
| 23 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 24 | |
| 25 | |
| 26 | /* We introduce here three types of object: category, category set, |
| 27 | and category table. |
| 28 | |
| 29 | A category is like syntax but differs in the following points: |
| 30 | |
| 31 | o A category is represented by a mnemonic character of the range |
| 32 | ` '(32)..`~'(126) (printable ASCII characters). |
| 33 | |
| 34 | o A category is not exclusive, i.e. a character has multiple |
| 35 | categories (category set). Of course, there's a case that a |
| 36 | category set is empty, i.e. the character has no category. |
| 37 | |
| 38 | o In addition to the predefined categories, a user can define new |
| 39 | categories. Total number of categories is limited to 95. |
| 40 | |
| 41 | A category set is a set of categories represented by Lisp |
| 42 | bool-vector of length 128 (only elements of 31th through 126th |
| 43 | are used). |
| 44 | |
| 45 | A category table is like syntax-table, represented by a Lisp |
| 46 | char-table. The contents are category sets or nil. It has two |
| 47 | extra slots, for a vector of doc string of each category and a |
| 48 | version number. |
| 49 | |
| 50 | The first extra slot is a vector of doc strings of categories, the |
| 51 | length is 95. The Nth element corresponding to the category N+32. |
| 52 | |
| 53 | The second extra slot is a version number of the category table. |
| 54 | But, for the moment, we are not using this slot. */ |
| 55 | |
| 56 | INLINE_HEADER_BEGIN |
| 57 | |
| 58 | #define CATEGORYP(x) RANGED_INTEGERP (0x20, x, 0x7E) |
| 59 | |
| 60 | #define CHECK_CATEGORY(x) \ |
| 61 | CHECK_TYPE (CATEGORYP (x), Qcategoryp, x) |
| 62 | |
| 63 | #define CATEGORY_SET_P(x) \ |
| 64 | (BOOL_VECTOR_P (x) && bool_vector_size (x) == 128) |
| 65 | |
| 66 | /* Return a new empty category set. */ |
| 67 | #define MAKE_CATEGORY_SET (Fmake_bool_vector (make_number (128), Qnil)) |
| 68 | |
| 69 | #define CHECK_CATEGORY_SET(x) \ |
| 70 | CHECK_TYPE (CATEGORY_SET_P (x), Qcategorysetp, x) |
| 71 | |
| 72 | /* Return the category set of character C in the current category table. */ |
| 73 | #define CATEGORY_SET(c) char_category_set (c) |
| 74 | |
| 75 | /* Return true if CATEGORY_SET contains CATEGORY. |
| 76 | Faster than '!NILP (Faref (category_set, make_number (category)))'. */ |
| 77 | INLINE bool |
| 78 | CATEGORY_MEMBER (EMACS_INT category, Lisp_Object category_set) |
| 79 | { |
| 80 | return bool_vector_bitref (category_set, category); |
| 81 | } |
| 82 | |
| 83 | /* Return true if category set of CH contains CATEGORY. */ |
| 84 | INLINE bool |
| 85 | CHAR_HAS_CATEGORY (int ch, int category) |
| 86 | { |
| 87 | Lisp_Object category_set = CATEGORY_SET (ch); |
| 88 | return CATEGORY_MEMBER (category, category_set); |
| 89 | } |
| 90 | |
| 91 | /* The standard category table is stored where it will automatically |
| 92 | be used in all new buffers. */ |
| 93 | #define Vstandard_category_table BVAR (&buffer_defaults, category_table) |
| 94 | |
| 95 | /* Return the doc string of CATEGORY in category table TABLE. */ |
| 96 | #define CATEGORY_DOCSTRING(table, category) \ |
| 97 | AREF (Fchar_table_extra_slot (table, make_number (0)), ((category) - ' ')) |
| 98 | |
| 99 | /* Set the doc string of CATEGORY to VALUE in category table TABLE. */ |
| 100 | #define SET_CATEGORY_DOCSTRING(table, category, value) \ |
| 101 | ASET (Fchar_table_extra_slot (table, make_number (0)), ((category) - ' '), value) |
| 102 | |
| 103 | /* Return the version number of category table TABLE. Not used for |
| 104 | the moment. */ |
| 105 | #define CATEGORY_TABLE_VERSION (table) \ |
| 106 | Fchar_table_extra_slot (table, make_number (1)) |
| 107 | |
| 108 | /* Return true if there is a word boundary between two |
| 109 | word-constituent characters C1 and C2 if they appear in this order. |
| 110 | There is no word boundary between two word-constituent ASCII and |
| 111 | Latin-1 characters. */ |
| 112 | #define WORD_BOUNDARY_P(c1, c2) \ |
| 113 | (!(SINGLE_BYTE_CHAR_P (c1) && SINGLE_BYTE_CHAR_P (c2)) \ |
| 114 | && word_boundary_p (c1, c2)) |
| 115 | |
| 116 | extern bool word_boundary_p (int, int); |
| 117 | |
| 118 | INLINE_HEADER_END |