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111 lines
4.2 KiB
C
111 lines
4.2 KiB
C
/* Declarations having to do with Emacs category tables.
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Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
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2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
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National Institute of Advanced Industrial Science and Technology (AIST)
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Registration Number H14PRO021
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Copyright (C) 2003
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National Institute of Advanced Industrial Science and Technology (AIST)
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Registration Number H13PRO009
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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 3 of the License, or
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(at your option) 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. If not, see <http://www.gnu.org/licenses/>. */
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/* We introduce here three types of object: category, category set,
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and category table.
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A category is like syntax but differs in the following points:
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o A category is represented by a mnemonic character of the range
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` '(32)..`~'(126) (printable ASCII characters).
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o A category is not exclusive, i.e. a character has multiple
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categories (category set). Of course, there's a case that a
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category set is empty, i.e. the character has no category.
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o In addition to the predefined categories, a user can define new
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categories. Total number of categories is limited to 95.
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A category set is a set of categories represented by Lisp
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bool-vector of length 128 (only elements of 31th through 126th
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are used).
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A category table is like syntax-table, represented by a Lisp
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char-table. The contents are category sets or nil. It has two
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extra slots, for a vector of doc string of each category and a
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version number.
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The first extra slot is a vector of doc strings of categories, the
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length is 95. The Nth element corresponding to the category N+32.
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The second extra slot is a version number of the category table.
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But, for the moment, we are not using this slot. */
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#define CATEGORYP(x) RANGED_INTEGERP (0x20, x, 0x7E)
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#define CHECK_CATEGORY(x) \
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CHECK_TYPE (CATEGORYP (x), Qcategoryp, x)
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#define XCATEGORY_SET XBOOL_VECTOR
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#define CATEGORY_SET_P(x) \
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(BOOL_VECTOR_P (x) && XBOOL_VECTOR (x)->size == 128)
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/* Return a new empty category set. */
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#define MAKE_CATEGORY_SET (Fmake_bool_vector (make_number (128), Qnil))
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#define CHECK_CATEGORY_SET(x) \
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CHECK_TYPE (CATEGORY_SET_P (x), Qcategorysetp, x)
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/* Return the category set of character C in the current category table. */
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#define CATEGORY_SET(c) char_category_set (c)
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/* Return 1 if CATEGORY_SET contains CATEGORY, else return 0.
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The faster version of `!NILP (Faref (category_set, category))'. */
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#define CATEGORY_MEMBER(category, category_set) \
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((XCATEGORY_SET (category_set)->data[(category) / 8] \
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>> ((category) % 8)) & 1)
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/* Return 1 if category set of CH contains CATEGORY, else return 0. */
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static inline int
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CHAR_HAS_CATEGORY (int ch, int category)
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{
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Lisp_Object category_set = CATEGORY_SET (ch);
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return CATEGORY_MEMBER (category, category_set);
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}
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/* The standard category table is stored where it will automatically
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be used in all new buffers. */
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#define Vstandard_category_table BVAR (&buffer_defaults, category_table)
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/* Return the doc string of CATEGORY in category table TABLE. */
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#define CATEGORY_DOCSTRING(table, category) \
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XVECTOR (Fchar_table_extra_slot (table, make_number (0)))->contents[(category) - ' ']
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/* Return the version number of category table TABLE. Not used for
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the moment. */
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#define CATEGORY_TABLE_VERSION (table) \
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Fchar_table_extra_slot (table, make_number (1))
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/* Return 1 if there is a word boundary between two word-constituent
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characters C1 and C2 if they appear in this order, else return 0.
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There is no word boundary between two word-constituent ASCII and
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Latin-1 characters. */
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#define WORD_BOUNDARY_P(c1, c2) \
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(!(SINGLE_BYTE_CHAR_P (c1) && SINGLE_BYTE_CHAR_P (c2)) \
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&& word_boundary_p (c1, c2))
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extern int word_boundary_p (int, int);
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