[bpt/emacs.git] / src / ccl.h

/* Header for CCL (Code Conversion Language) interpreter.
   Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
   Licensed to the Free Software Foundation.

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 2, 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, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

#ifndef _CCL_H
#define _CCL_H

/* Macros for exit status of CCL program.  */
#define CCL_STAT_SUCCESS	0 /* Terminated successfully.  */
#define CCL_STAT_SUSPEND_BY_SRC	1 /* Terminated by empty input.  */
#define CCL_STAT_SUSPEND_BY_DST	2 /* Terminated by output buffer full.  */
#define CCL_STAT_INVALID_CMD	3 /* Terminated because of invalid
				     command.  */
#define CCL_STAT_QUIT		4 /* Terminated because of quit.  */

/* Structure to hold information about running CCL code.  Read
   comments in the file ccl.c for the detail of each field.  */
struct ccl_program {
  int size;			/* Size of the compiled code.  */
  Lisp_Object *prog;		/* Pointer into the compiled code.  */
  int ic;			/* Instruction Counter (index for PROG).  */
  int eof_ic;			/* Instruction Counter for end-of-file
				   processing code.  */
  int reg[8];			/* CCL registers, reg[7] is used for
				   condition flag of relational
				   operations.  */
  int private_state;            /* CCL instruction may use this
				   for private use, mainly for preservation
				   internal states for suspending.
				   This variable is set to 0 when ccl is 
				   set up.  */
  int last_block;		/* Set to 1 while processing the last
				   block. */
  int status;			/* Exit status of the CCL program.  */
  int buf_magnification;	/* Output buffer magnification.  How
				   many times bigger the output buffer
				   should be than the input buffer.  */
  int stack_idx;		/* How deep the call of CCL_Call is nested.  */
};

/* This data type is used for the spec field of the structure
   coding_system.  */

struct ccl_spec {
  struct ccl_program decoder;
  struct ccl_program encoder;
  unsigned char valid_codes[256];
};

/* Alist of fontname patterns vs corresponding CCL program.  */
extern Lisp_Object Vfont_ccl_encoder_alist;

/* Setup fields of the structure pointed by CCL appropriately for the
   execution of ccl program CCL_PROG (symbol or vector).  */
extern int setup_ccl_program P_ ((struct ccl_program *, Lisp_Object));

extern int ccl_driver P_ ((struct ccl_program *, unsigned char *,
			   unsigned char *, int, int, int *));

/* Vector of CCL program names vs corresponding program data.  */
extern Lisp_Object Vccl_program_table;

/* Symbols of ccl program have this property, a value of the property
   is an index for Vccl_protram_table. */
extern Lisp_Object Qccl_program_idx;

#endif /* _CCL_H */
Commit	Line	Data
4ed46869	1	/* Header for CCL (Code Conversion Language) interpreter.
4ed46869	2	Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
75c8c592	3	Licensed to the Free Software Foundation.
4ed46869	4
369314dc KH	5	This file is part of GNU Emacs.
	6
	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.
4ed46869	11
369314dc KH	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.
4ed46869	16
369314dc KH	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. */
4ed46869 KH	21
	22	#ifndef _CCL_H
	23	#define _CCL_H
	24
eacba247 KH	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. */
	32
4ed46869 KH	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. */
eacba247 KH	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. */
4ed46869 KH	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. */
e05645ee	55	int stack_idx; /* How deep the call of CCL_Call is nested. */
4ed46869 KH	56	};
	57
	58	/* This data type is used for the spec field of the structure
	59	coding_system. */
	60
	61	struct ccl_spec {
	62	struct ccl_program decoder;
	63	struct ccl_program encoder;
a35fd731	64	unsigned char valid_codes[256];
4ed46869 KH	65	};
	66
	67	/* Alist of fontname patterns vs corresponding CCL program. */
	68	extern Lisp_Object Vfont_ccl_encoder_alist;
	69
58068210	70	/* Setup fields of the structure pointed by CCL appropriately for the
e5e6d6fb KH	71	execution of ccl program CCL_PROG (symbol or vector). */
e5e6d6fb KH	72	extern int setup_ccl_program P_ ((struct ccl_program *, Lisp_Object));
58068210 AS	73
	74	extern int ccl_driver P_ ((struct ccl_program , unsigned char ,
	75	unsigned char , int, int, int ));
	76
1cfae2bf KH	77	/* Vector of CCL program names vs corresponding program data. */
	78	extern Lisp_Object Vccl_program_table;
	79
	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;
	83
4ed46869	84	#endif /* _CCL_H */