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d427b66a | 1 | /* Things for GLYPHS and glyph tables. |
c6c5df7f | 2 | Copyright (C) 1993 Free Software Foundation, Inc. |
d427b66a JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
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 | |
7c938215 | 8 | the Free Software Foundation; either version 2, or (at your option) |
d427b66a JB |
9 | any later version. |
10 | ||
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. | |
15 | ||
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. */ | |
19 | ||
20 | /* Access the slots of a display-table, according to their purpose. */ | |
21 | ||
a45e35e1 | 22 | #define DISP_TABLE_SIZE 262 |
d427b66a JB |
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]) | |
82c51511 | 27 | #define DISP_INVIS_VECTOR(dp) ((dp)->contents[260]) |
a45e35e1 | 28 | #define DISP_BORDER_GLYPH(dp) ((dp)->contents[261]) |
82c51511 | 29 | #define DISP_CHAR_VECTOR(dp, c) ((dp)->contents[c]) |
d427b66a | 30 | |
ef5623ef | 31 | /* Defined in window.c. */ |
d427b66a | 32 | extern struct Lisp_Vector *window_display_table (); |
ef5623ef JB |
33 | |
34 | /* Defined in indent.c. */ | |
35 | extern struct Lisp_Vector *buffer_display_table (); | |
d427b66a JB |
36 | |
37 | /* Display table to use for vectors that don't specify their own. */ | |
38 | extern Lisp_Object Vstandard_display_table; | |
39 | ||
40 | /* Vector of GLYPH definitions. Indexed by GLYPH number, | |
41 | the contents are a string which is how to output the GLYPH. */ | |
42 | extern Lisp_Object Vglyph_table; | |
43 | ||
44 | /* Return the current length of the GLYPH table, | |
45 | or 0 if the table isn't currently valid. */ | |
46 | #define GLYPH_TABLE_LENGTH \ | |
40de0d7b | 47 | ((VECTORP (Vglyph_table)) ? XVECTOR (Vglyph_table)->size : 0) |
d427b66a JB |
48 | |
49 | /* Return the current base (for indexing) of the GLYPH table, | |
50 | or 0 if the table isn't currently valid. */ | |
51 | #define GLYPH_TABLE_BASE \ | |
40de0d7b | 52 | ((VECTORP (Vglyph_table)) ? XVECTOR (Vglyph_table)->contents : 0) |
d427b66a JB |
53 | |
54 | /* Given BASE and LEN returned by the two previous macros, | |
55 | return nonzero if the GLYPH code G should be output as a single | |
56 | character with code G. Return zero if G has a string in the table. */ | |
40de0d7b | 57 | #define GLYPH_SIMPLE_P(base,len,g) ((g) >= (len) || !STRINGP (base[g])) |
d427b66a JB |
58 | |
59 | /* Given BASE and LEN returned by the two previous macros, | |
60 | return nonzero if GLYPH code G is aliased to a different code. */ | |
40de0d7b | 61 | #define GLYPH_ALIAS_P(base,len,g) ((g) < (len) && INTEGERP (base[g])) |
d427b66a JB |
62 | |
63 | /* Assuming that GLYPH_SIMPLE_P (BASE, LEN, G) is 1, | |
64 | return the alias for G. */ | |
65 | #define GLYPH_ALIAS(base, g) XINT (base[g]) | |
66 | ||
be269961 JB |
67 | /* Follow all aliases for G in the glyph table given by (BASE, |
68 | LENGTH), and set G to the final glyph. */ | |
69 | #define GLYPH_FOLLOW_ALIASES(base, length, g) \ | |
70 | while (GLYPH_ALIAS_P ((base), (length), (g))) \ | |
71 | (g) = GLYPH_ALIAS ((base), (g)); | |
72 | ||
d427b66a JB |
73 | /* Assuming that GLYPH_SIMPLE_P (BASE, LEN, G) is 0, |
74 | return the length and the address of the character-sequence | |
75 | used for outputting GLYPH G. */ | |
76 | #define GLYPH_LENGTH(base,g) XSTRING (base[g])->size | |
77 | #define GLYPH_STRING(base,g) XSTRING (base[g])->data | |
78 | ||
79 | /* GLYPH for a space character. */ | |
80 | ||
81 | #define SPACEGLYPH 040 | |
82 | #define NULL_GLYPH 00 | |
83 | ||
84 | #define GLYPH_FROM_CHAR(c) (c) | |
85 | ||
86 | extern int glyphlen (); | |
87 | extern void str_to_glyph_cpy (); | |
88 | extern void str_to_glyph_ncpy (); | |
89 | extern void glyph_to_str_cpy (); |