code.delx.au - gnu-emacs/blob - src/ccl.h

   1 /* Header for CCL (Code Conversion Language) interpreter.
   2    Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
   3    Licensed to the Free Software Foundation.
   4    Copyright (C) 2001, 2002
   5      National Institute of Advanced Industrial Science and Technology (AIST)
   6      Registration Number H13PRO009
   7
   8 This file is part of GNU Emacs.
   9
  10 GNU Emacs is free software; you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation; either version 2, or (at your option)
  13 any later version.
  14
  15 GNU Emacs is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with GNU Emacs; see the file COPYING.  If not, write to
  22 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 Boston, MA 02111-1307, USA.  */
  24
  25 #ifndef EMACS_CCL_H
  26 #define EMACS_CCL_H
  27
  28 /* Macros for exit status of CCL program.  */
  29 #define CCL_STAT_SUCCESS        0 /* Terminated successfully.  */
  30 #define CCL_STAT_SUSPEND_BY_SRC 1 /* Terminated by empty input.  */
  31 #define CCL_STAT_SUSPEND_BY_DST 2 /* Terminated by output buffer full.  */
  32 #define CCL_STAT_INVALID_CMD    3 /* Terminated because of invalid
  33                                      command.  */
  34 #define CCL_STAT_QUIT           4 /* Terminated because of quit.  */
  35
  36 /* Structure to hold information about running CCL code.  Read
  37    comments in the file ccl.c for the detail of each field.  */
  38 struct ccl_program {
  39   int size;                     /* Size of the compiled code.  */
  40   Lisp_Object *prog;            /* Pointer into the compiled code.  */
  41   int ic;                       /* Instruction Counter (index for PROG).  */
  42   int eof_ic;                   /* Instruction Counter for end-of-file
  43                                    processing code.  */
  44   int reg[8];                   /* CCL registers, reg[7] is used for
  45                                    condition flag of relational
  46                                    operations.  */
  47   int private_state;            /* CCL instruction may use this
  48                                    for private use, mainly for saving
  49                                    internal states on suspending.
  50                                    This variable is set to 0 when ccl is
  51                                    set up.  */
  52   int last_block;               /* Set to 1 while processing the last
  53                                    block. */
  54   int status;                   /* Exit status of the CCL program.  */
  55   int buf_magnification;        /* Output buffer magnification.  How
  56                                    many times bigger the output buffer
  57                                    should be than the input buffer.  */
  58   int stack_idx;                /* How deep the call of CCL_Call is nested.  */
  59   int src_multibyte;            /* 1 if the input buffer is multibyte.  */
  60   int dst_multibyte;            /* 1 if the output buffer is multibyte.  */
  61   int cr_consumed;              /* Flag for encoding DOS-like EOL
  62                                    format when the CCL program is used
  63                                    for encoding by a coding
  64                                    system.  */
  65   int consumed;
  66   int produced;
  67   int suppress_error;           /* If nonzero, don't insert error
  68                                    message in the output.  */
  69   int eight_bit_control;        /* Set to nonzero if CCL_WRITE_CHAR
  70                                    writes eight-bit-control char.  */
  71 };
  72
  73 /* This data type is used for the spec field of the structure
  74    coding_system.  */
  75
  76 struct ccl_spec {
  77   struct ccl_program ccl;
  78   int cr_carryover;             /* CR carryover flag.  */
  79   unsigned char eight_bit_carryover[MAX_MULTIBYTE_LENGTH];
  80 };
  81
  82 #define CODING_SPEC_CCL_PROGRAM(coding) ((coding)->spec.ccl.ccl)
  83
  84 /* Alist of fontname patterns vs corresponding CCL program.  */
  85 extern Lisp_Object Vfont_ccl_encoder_alist;
  86
  87 /* Setup fields of the structure pointed by CCL appropriately for the
  88    execution of ccl program CCL_PROG (symbol or vector).  */
  89 extern int setup_ccl_program P_ ((struct ccl_program *, Lisp_Object));
  90
  91 extern void ccl_driver P_ ((struct ccl_program *, int *, int *, int, int,
  92                             Lisp_Object));
  93
  94 /* Vector of CCL program names vs corresponding program data.  */
  95 extern Lisp_Object Vccl_program_table;
  96
  97 /* Symbols of ccl program have this property, a value of the property
  98    is an index for Vccl_protram_table. */
  99 extern Lisp_Object Qccl_program_idx;
 100
 101 extern Lisp_Object Qccl, Qcclp;
 102
 103 EXFUN (Fccl_program_p, 1);
 104
 105 #define CHECK_CCL_PROGRAM(x)                    \
 106   do {                                          \
 107     if (NILP (Fccl_program_p (x)))              \
 108       x = wrong_type_argument (Qcclp, (x));     \
 109   } while (0);
 110
 111 #endif /* EMACS_CCL_H */