path: root/iconvdata/iso-2022-jp.c

/* Conversion module for ISO-2022-JP.
   Copyright (C) 1998 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <gconv.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "jis0201.h"
#include "jis0208.h"
#include "jis0212.h"
#include "gb2312.h"
#include "ksc5601.h"

struct gap
{
  uint16_t start;
  uint16_t end;
  int32_t idx;
};

#include "iso8859-7jp.h"

/* This makes obvious what everybody knows: 0x1b is the Esc character.  */
#define ESC 0x1b

/* We provide our own initialization and destructor function.  */
#define DEFINE_INIT	0
#define DEFINE_FINI	0

/* Definitions used in the body of the `gconv' function.  */
#define FROM_LOOP		from_iso2022jp_loop
#define TO_LOOP			to_iso2022jp_loop
#define MIN_NEEDED_FROM		1
#define MAX_NEEDED_FROM		4
#define MIN_NEEDED_TO		4
#define MAX_NEEDED_TO		4
#define FROM_DIRECTION		(dir == from_iso2022jp)
#define PREPARE_LOOP \
  enum direction dir = ((struct iso2022jp_data *) step->data)->dir;	      \
  enum variant var = ((struct iso2022jp_data *) step->data)->var;	      \
  int save_set;								      \
  int *setp = &data->statep->count;
#define EXTRA_LOOP_ARGS		, var, setp


/* Direction of the transformation.  */
enum direction
{
  illegal_dir,
  to_iso2022jp,
  from_iso2022jp
};

/* We handle ISO-2022-jp and ISO-2022-JP-2 here.  */
enum variant
{
  illegal_var,
  iso2022jp,
  iso2022jp2
};


struct iso2022jp_data
{
  enum direction dir;
  enum variant var;
};


/* The COUNT element of the state keeps track of the currently selected
   character set.  The possible values are:  */
enum
{
  ASCII_set = 0,
  JISX0208_1978_set,
  JISX0208_1983_set,
  JISX0201_Roman_set,
  JISX0201_Kana_set,
  GB2312_set,
  KSC5601_set,
  JISX0212_set,
  ISO88591_set,
  ISO88597_set
};


int
gconv_init (struct gconv_step *step)
{
  /* Determine which direction.  */
  struct iso2022jp_data *new_data;
  enum direction dir = illegal_dir;
  enum variant var = illegal_var;
  int result;

  if (__strcasecmp (step->from_name, "ISO-2022-JP//") == 0)
    {
      dir = from_iso2022jp;
      var = iso2022jp;
    }
  else if (__strcasecmp (step->to_name, "ISO-2022-JP//") == 0)
    {
      dir = to_iso2022jp;
      var = iso2022jp;
    }
  else if (__strcasecmp (step->from_name, "ISO-2022-JP-2//") == 0)
    {
      dir = from_iso2022jp;
      var = iso2022jp2;
    }
  else if (__strcasecmp (step->to_name, "ISO-2022-JP-2//") == 0)