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- /* Things for GLYPHS and glyph tables.
- Copyright (C) 1993 Free Software Foundation, Inc.
-
- This file is part of GNU Emacs.
-
- GNU Emacs is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 1, or (at your option)
- any later version.
-
- GNU Emacs is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU Emacs; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* Access the slots of a display-table, according to their purpose. */
-
- #define DISP_TABLE_SIZE 261
- #define DISP_TRUNC_GLYPH(dp) ((dp)->contents[256])
- #define DISP_CONTINUE_GLYPH(dp) ((dp)->contents[257])
- #define DISP_ESCAPE_GLYPH(dp) ((dp)->contents[258])
- #define DISP_CTRL_GLYPH(dp) ((dp)->contents[259])
- #define DISP_INVIS_VECTOR(dp) ((dp)->contents[260])
- #define DISP_CHAR_VECTOR(dp, c) ((dp)->contents[c])
-
- extern struct Lisp_Vector *window_display_table ();
-
- /* Display table to use for vectors that don't specify their own. */
- extern Lisp_Object Vstandard_display_table;
-
- /* Vector of GLYPH definitions. Indexed by GLYPH number,
- the contents are a string which is how to output the GLYPH. */
- extern Lisp_Object Vglyph_table;
-
- /* Return the current length of the GLYPH table,
- or 0 if the table isn't currently valid. */
- #define GLYPH_TABLE_LENGTH \
- ((XTYPE (Vglyph_table) == Lisp_Vector) \
- ? XVECTOR (Vglyph_table)->size : 0)
-
- /* Return the current base (for indexing) of the GLYPH table,
- or 0 if the table isn't currently valid. */
- #define GLYPH_TABLE_BASE \
- ((XTYPE (Vglyph_table) == Lisp_Vector) \
- ? XVECTOR (Vglyph_table)->contents : 0)
-
- /* Given BASE and LEN returned by the two previous macros,
- return nonzero if the GLYPH code G should be output as a single
- character with code G. Return zero if G has a string in the table. */
- #define GLYPH_SIMPLE_P(base,len,g) \
- ((g) >= (len) || XTYPE (base[g]) != Lisp_String)
-
- /* Given BASE and LEN returned by the two previous macros,
- return nonzero if GLYPH code G is aliased to a different code. */
- #define GLYPH_ALIAS_P(base,len,g) \
- ((g) < (len) && XTYPE (base[g]) == Lisp_Int)
-
- /* Assuming that GLYPH_SIMPLE_P (BASE, LEN, G) is 1,
- return the alias for G. */
- #define GLYPH_ALIAS(base, g) XINT (base[g])
-
- /* Follow all aliases for G in the glyph table given by (BASE,
- LENGTH), and set G to the final glyph. */
- #define GLYPH_FOLLOW_ALIASES(base, length, g) \
- while (GLYPH_ALIAS_P ((base), (length), (g))) \
- (g) = GLYPH_ALIAS ((base), (g));
-
- /* Assuming that GLYPH_SIMPLE_P (BASE, LEN, G) is 0,
- return the length and the address of the character-sequence
- used for outputting GLYPH G. */
- #define GLYPH_LENGTH(base,g) XSTRING (base[g])->size
- #define GLYPH_STRING(base,g) XSTRING (base[g])->data
-
- /* GLYPH for a space character. */
-
- #define SPACEGLYPH 040
- #define NULL_GLYPH 00
-
- #define GLYPH_FROM_CHAR(c) (c)
-
- extern int glyphlen ();
- extern void str_to_glyph_cpy ();
- extern void str_to_glyph_ncpy ();
- extern void glyph_to_str_cpy ();
-