Initial revision
[emacs.git] / src / disptab.h
blob235f6bf24fb452d06f1e87a5db9e79080698cca7
1 /* Things for GLYPHS and glyph tables.
2 Copyright (C) 1993 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 1, or (at your option)
9 any later version.
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
20 /* Access the slots of a display-table, according to their purpose. */
22 #define DISP_TABLE_SIZE 261
23 #define DISP_TRUNC_GLYPH(dp) ((dp)->contents[256])
24 #define DISP_CONTINUE_GLYPH(dp) ((dp)->contents[257])
25 #define DISP_ESCAPE_GLYPH(dp) ((dp)->contents[258])
26 #define DISP_CTRL_GLYPH(dp) ((dp)->contents[259])
27 #define DISP_INVIS_VECTOR(dp) ((dp)->contents[260])
28 #define DISP_CHAR_VECTOR(dp, c) ((dp)->contents[c])
30 extern struct Lisp_Vector *window_display_table ();
32 /* Display table to use for vectors that don't specify their own. */
33 extern Lisp_Object Vstandard_display_table;
35 /* Vector of GLYPH definitions. Indexed by GLYPH number,
36 the contents are a string which is how to output the GLYPH. */
37 extern Lisp_Object Vglyph_table;
39 /* Return the current length of the GLYPH table,
40 or 0 if the table isn't currently valid. */
41 #define GLYPH_TABLE_LENGTH \
42 ((XTYPE (Vglyph_table) == Lisp_Vector) \
43 ? XVECTOR (Vglyph_table)->size : 0)
45 /* Return the current base (for indexing) of the GLYPH table,
46 or 0 if the table isn't currently valid. */
47 #define GLYPH_TABLE_BASE \
48 ((XTYPE (Vglyph_table) == Lisp_Vector) \
49 ? XVECTOR (Vglyph_table)->contents : 0)
51 /* Given BASE and LEN returned by the two previous macros,
52 return nonzero if the GLYPH code G should be output as a single
53 character with code G. Return zero if G has a string in the table. */
54 #define GLYPH_SIMPLE_P(base,len,g) \
55 ((g) >= (len) || XTYPE (base[g]) != Lisp_String)
57 /* Given BASE and LEN returned by the two previous macros,
58 return nonzero if GLYPH code G is aliased to a different code. */
59 #define GLYPH_ALIAS_P(base,len,g) \
60 ((g) < (len) && XTYPE (base[g]) == Lisp_Int)
62 /* Assuming that GLYPH_SIMPLE_P (BASE, LEN, G) is 1,
63 return the alias for G. */
64 #define GLYPH_ALIAS(base, g) XINT (base[g])
66 /* Follow all aliases for G in the glyph table given by (BASE,
67 LENGTH), and set G to the final glyph. */
68 #define GLYPH_FOLLOW_ALIASES(base, length, g) \
69 while (GLYPH_ALIAS_P ((base), (length), (g))) \
70 (g) = GLYPH_ALIAS ((base), (g));
72 /* Assuming that GLYPH_SIMPLE_P (BASE, LEN, G) is 0,
73 return the length and the address of the character-sequence
74 used for outputting GLYPH G. */
75 #define GLYPH_LENGTH(base,g) XSTRING (base[g])->size
76 #define GLYPH_STRING(base,g) XSTRING (base[g])->data
78 /* GLYPH for a space character. */
80 #define SPACEGLYPH 040
81 #define NULL_GLYPH 00
83 #define GLYPH_FROM_CHAR(c) (c)
85 extern int glyphlen ();
86 extern void str_to_glyph_cpy ();
87 extern void str_to_glyph_ncpy ();
88 extern void glyph_to_str_cpy ();