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[emacs.git] / src / ccl.h
blobb0c9f20e8a3986dbfa702caa47034c5c67f44aae
1 /* Header for CCL (Code Conversion Language) interpreter.
2 Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
3 Licensed to the Free Software Foundation.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 #ifndef _CCL_H
23 #define _CCL_H
25 /* Macros for exit status of CCL program. */
26 #define CCL_STAT_SUCCESS 0 /* Terminated successfully. */
27 #define CCL_STAT_SUSPEND_BY_SRC 1 /* Terminated by empty input. */
28 #define CCL_STAT_SUSPEND_BY_DST 2 /* Terminated by output buffer full. */
29 #define CCL_STAT_INVALID_CMD 3 /* Terminated because of invalid
30 command. */
31 #define CCL_STAT_QUIT 4 /* Terminated because of quit. */
33 /* Structure to hold information about running CCL code. Read
34 comments in the file ccl.c for the detail of each field. */
35 struct ccl_program {
36 int size; /* Size of the compiled code. */
37 Lisp_Object *prog; /* Pointer into the compiled code. */
38 int ic; /* Instruction Counter (index for PROG). */
39 int eof_ic; /* Instruction Counter for end-of-file
40 processing code. */
41 int reg[8]; /* CCL registers, reg[7] is used for
42 condition flag of relational
43 operations. */
44 int private_state; /* CCL instruction may use this
45 for private use, mainly for preservation
46 internal states for suspending.
47 This variable is set to 0 when ccl is
48 set up. */
49 int last_block; /* Set to 1 while processing the last
50 block. */
51 int status; /* Exit status of the CCL program. */
52 int buf_magnification; /* Output buffer magnification. How
53 many times bigger the output buffer
54 should be than the input buffer. */
55 int stack_idx; /* How deep the call of CCL_Call is nested. */
58 /* This data type is used for the spec field of the structure
59 coding_system. */
61 struct ccl_spec {
62 struct ccl_program decoder;
63 struct ccl_program encoder;
64 unsigned char valid_codes[256];
67 /* Alist of fontname patterns vs corresponding CCL program. */
68 extern Lisp_Object Vfont_ccl_encoder_alist;
70 /* Setup fields of the structure pointed by CCL appropriately for the
71 execution of ccl program CCL_PROG (symbol or vector). */
72 extern int setup_ccl_program P_ ((struct ccl_program *, Lisp_Object));
74 extern int ccl_driver P_ ((struct ccl_program *, unsigned char *,
75 unsigned char *, int, int, int *));
77 /* Vector of CCL program names vs corresponding program data. */
78 extern Lisp_Object Vccl_program_table;
80 /* Symbols of ccl program have this property, a value of the property
81 is an index for Vccl_protram_table. */
82 extern Lisp_Object Qccl_program_idx;
84 #endif /* _CCL_H */