/*
    TiMidity++ -- MIDI to WAVE converter and player
    Copyright (C) 1999-2002 Masanao Izumo <mo@goice.co.jp>
    Copyright (C) 1995 Tuukka Toivonen <tt@cgs.fi>

    This program 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 of the License, or
    (at your option) any later version.

    This program 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 this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#include "timidity.h"
#include "nkflib.h"
#ifdef JAPANESE

/** Network Kanji Filter. (PDS Version)
************************************************************************
** Copyright (C) 1987, Fujitsu LTD. (Itaru ICHIKAWA)
** 連絡先： （株）富士通研究所　ソフト３研　市川　至
** （E-Mail Address: ichikawa@flab.fujitsu.co.jp）
** Copyright (C) 1996,1998
** 連絡先： 琉球大学情報工学科 河野 真治  mine/X0208 support
** （E-Mail Address: kono@ie.u-ryukyu.ac.jp）
** 連絡先： COW for DOS & Win16 & Win32 & OS/2
** （E-Mail Address: GHG00637@niftyserve.or.p）
**    このソースのいかなる複写，改変，修正も許諾します。ただし、
**    その際には、誰が貢献したを示すこの部分を残すこと。
**    再配布や雑誌の付録などの問い合わせも必要ありません。
**    このプログラムについては特に何の保証もしない、悪しからず。
**    Everyone is permitted to do anything on this program
**    including copying, modifying, improving.
**    as long as you don't try to pretend that you wrote it.
**    i.e., the above copyright notice has to appear in all copies.
**    You don't have to ask before copying or publishing.
**    THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE.
***********************************************************************/

/* 以下のソースは、nkf を文字列操作できるよう改造したライブラリである。

   nkf_conv(元文字列,出力文字列、out モード)
     出力文字列を NULL としたときは、元文字列を操作する。
     バグ : 変換され出力される文字列のための領域はある程度とっておくこと。
	    さもないと、バグを生じる。
   nkf_convert(元文字列、出力文字列、出力文字列の最大の大きさ、
               in モード、out モード)
     kanji_conv に準じる。出力文字列の最大の大きさが指定できる。
     その大きさ以上になったときはそれ以上の文字の出力は打ち切られる。
   モード
     nkf の convert に与えるオプションを与える文字列。空白で区切って指定する。
     各オプション:

   このプログラムに関しての著作権がらみのことは nkf に準じるものとする。
   無保証であるので、使用の場合は自らの責任をもってすること。
   改変者 青木大輔	1997.02
*/

/* 無駄なところを削除した．
   他で用いられないインターフェースは static にした．
   コンパイラの Warning メッセージを抑制するように ANSI C の形式にした．
   文字を unsigned char * で SFILE に蓄えるようにした．
   SFILE を簡単化．
   c->input_f == FALSE で convert すると，半角カタカナ SJIS が EUC
         と判断されてしまうバグ(仕様だった？)を直した．
	 しかしながら，SJIS の半角カタカナ 2 文字と EUC は区別できない
	 場合がある．このときは SJIS として変換することにした．
   EUC_STRICT_CHECK を定義すると EUC-Japan の定義コードを完全にチェックする
   ようにした．
   読み込み文字を指定できるようにした．
   改変者 出雲正尚 1997
*/

/*
  1.7ベースに変更。
  改変者 青木大輔 2000.10
*/

/* もし，EUC-Japan の完全なチェックをする場合は EUC_STRICT_CHECK を定義
 * してください．ただし，1 バイトでも EUC-Japan の未定義文字が含まれていると
 * EUC とみなされなくなってしまいます．他のプログラムで漢字コードを EUC に変換
 * した場合，EUC の未定義域へマップされる可能性があります．
 */
/* #define EUC_STRICT_CHECK */

#if 0
static char *CopyRight =
      "Copyright (C) 1987, FUJITSU LTD. (I.Ichikawa),1998 S. Kono, COW";
static char *Version =
      "1.7";
static char *Patchlevel =
      "0/9711/Shinji Kono";
#endif

/*
**
**
**
** USAGE:       nkf [flags] [file]
**
** Flags:
** b    Output is bufferred             (DEFAULT)
** u    Output is unbufferred
**
** t    no operation
**
** j    Outout code is JIS 7 bit        (DEFAULT SELECT)
** s    Output code is MS Kanji         (DEFAULT SELECT)
** e    Output code is AT&T JIS         (DEFAULT SELECT)
** l    Output code is JIS 7bit and ISO8859-1 Latin-1
**
** m    MIME conversion for ISO-2022-JP
** i_ Output sequence to designate JIS-kanji (DEFAULT_J)
** o_ Output sequence to designate single-byte roman characters (DEFAULT_R)
**
** r  {de/en}crypt ROT13/47
**
** v  display Version
**
** T  Text mode output        (for MS-DOS)
**
** x    Do not convert X0201 kana into X0208
** Z    Convert X0208 alphabet to ASCII
**
** f60  fold option
**
** m    MIME decode
** B    try to fix broken JIS, missing Escape
** B[1-9]  broken level
**
** O   Output to 'nkf.out' file
** d   Delete \r in line feed
** c   Add \r in line feed
**/
/******************************/
/* デフォルトの出力コード選択 */
/* Select DEFAULT_CODE */
#define DEFAULT_CODE_JIS
/* #define DEFAULT_CODE_SJIS */
/* #define DEFAULT_CODE_EUC */
/******************************/

#if (defined(__TURBOC__) || defined(LSI_C)) && !defined(MSDOS)
#define MSDOS
#endif

#include <stdio.h>
#include <stdlib.h>
#ifndef NO_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif

#ifdef MSDOS
#ifdef LSI_C
#define setbinmode(fp) fsetbin(fp)
#else /* Microsoft C, Turbo C */
#define setbinmode(fp) setmode(fileno(fp), O_BINARY)
#endif
#else /* UNIX,OS/2 */
#define setbinmode(fp)
#endif

#ifdef _IOFBF /* SysV and MSDOS */
#define       setvbuffer(fp, buf, size)       setvbuf(fp, buf, _IOFBF, size)
#else /* BSD */
#define       setvbuffer(fp, buf, size)       setbuffer(fp, buf, size)
#endif

#include "common.h"
#include "nkflib.h"

#define VOIDVOID 0

#ifndef FALSE
#define	FALSE	0
#endif /* FALSE */

#ifndef TRUE
#define	TRUE	1
#endif /* TRUE */

/* state of output_mode and c->input_mode  */

#define         ASCII           0
#define         X0208           1
#define         X0201           2
#define         NO_X0201        3
#define         JIS_INPUT       4
#define         SJIS_INPUT      5
#define         LATIN1_INPUT    6
#define         FIXED_MIME      7
#define         DOUBLE_SPACE    -2
#define         EUC_INPUT       8

#define         NL      0x0a
#define         ESC     0x1b
#define         SPACE      0x20
#define         AT      0x40
#define         SSP     0xa0
#define         DEL     0x7f
#define         SI      0x0f
#define         SO      0x0e
#define         SSO     0x8e

#define         IOBUF_SIZE      16384

#define         DEFAULT_J       'B'
#define         DEFAULT_R       'B'

#define         SJ0162  0x00e1          /* 01 - 62 ku offset */
#define         SJ6394  0x0161          /* 63 - 94 ku offset */


/* SFILE begin */
/* 文字列 を FILE みたいに扱う小細工 */

/*
   これは nkf の漢字コード変換がファイルに対してのみ対応しているのでそれを
   文字列操作で使えるようにするためのインターフェースである。ただし、
   対応している機能は少ないし、必要なものしか作っていない。したがって、
   これらは nkf の中でしか意味のないものであろう。

   SFILE は FILE みたいなもので文字列をファイルみたいに扱えるようにする。
   SFILE を使うためには必ずオープンすること。ssopen で mode=="new" または
   "auto" 指定していなければクローズする必要はない。SFILE の中を直接操作
   した場合はいろいろ問題が出てくるであろう。

   SEOF は EOF みたいなもの。

   ssopen は open みたいな関数で、
      sf : SFILE 型の変数
      st : 文字列
      maxsize : 文字列が許容できる最大の大きさ。sputc 時に制限を入れるもの。
		maxsize に -1 を指定するとこの処理を無視するようになる。
		そのときは、必要以上の文字を sputc しないように気をつけなけれ
		ばならない。
      mode : newstr、stdout、stdin の文字列を指定できる。
	     例えば mode="new stdout"
	     newstr は自動的に文字列のメモリを maxsize だけ獲得する。
	     ただし、maxsize < 1 のときはディフォルトの値を獲得する。
	     stdout は SFILE の標準出力 stdout となる文字列を指定する。
	     stdin は SFILE の標準入力 stdin となる文字列を指定する。

   sclose は close みたいな関数で、newstr でオープンされていたときは、
   文字列も free で消去する。

   sgetc、sungetc、sputc、sputchar はそれぞれ getc、ungetc、putc、putchar
   に相当する。引数の sf が NULL の時は SEOF を返す。
*/

typedef struct __SFILE {
  unsigned char *pointer;      /* 文字列現在のポインタ */
  unsigned char *head;	       /* 文字列の最初の位置 */
  unsigned char *tail;	       /* 文字列の許容の最後の位置 */
  char mode[20];	       /* 文字列オープンモード newstr,stdout,stdin */
				/* "newstr stdin" の組合わせはない */
} SFILE;
#define SEOF -1

#define sstdout (SFILE *)(c->nkflib_sstdout)
#define sstdin (SFILE *)(c->nkflib_sstdin)
#define _sstdout (c->nkflib_sstdout)
#define _sstdin (c->nkflib_sstdin)

#ifndef SAFE_CONVERT_LENGTH
#define SAFE_CONVERT_LENGTH(len) (2 * (len) + 7)
#endif /* SAFE_CONVERT_LENGTH */

/* Functions */
static SFILE *ssopen(struct timiditycontext_t *c, SFILE *, char *string,signed int maxsize,char *md);
static void sclose(struct timiditycontext_t *c, SFILE *sf);
static int sgetc(SFILE *sf);
static int sungetc(int ch,SFILE *sf);
static int sputc(int c,SFILE *sf);
#define sputchar(c) sputc(c,sstdout)

/* nkf 漢字コンバート */
char *nkf_convert(struct timiditycontext_t *c, char *si,char *so,int maxsize,char *in_mode,char *out_mode);
char *nkf_conv(struct timiditycontext_t *c, char *si,char *so,char *out_mode);

static int check_kanji_code(unsigned char *p);

/* MIME preprocessor */

#undef STRICT_MIME       /* do stupid strict mime integrity check */
#define GETC(p) ((!c->mime_mode)?sgetc(p):mime_getc(c, p))
#define UNGETC(ch,p)     ((!c->mime_mode)?sungetc(ch,p):mime_ungetc(c, ch))


#ifdef EASYWIN /*Easy Win */
extern POINT _BufferSize;
#endif

/*      function prototype  */

#if 0
static  int     noconvert(SFILE *f);
#endif
static  int     kanji_convert(struct timiditycontext_t *c, SFILE *f);
static  int     h_conv(struct timiditycontext_t *c, SFILE *f,int c2,int c1);
static  int     push_hold_buf(struct timiditycontext_t *c, int c2,int c1);
static  int     s_iconv(struct timiditycontext_t *c, int c2,int c1);
static  int     e_oconv(struct timiditycontext_t *c, int c2,int c1);
static  int     s_oconv(struct timiditycontext_t *c, int c2,int c1);
static  int     j_oconv(struct timiditycontext_t *c, int c2,int c1);
static  int     line_fold(struct timiditycontext_t *c, int c2,int c1);
static  int     pre_convert(struct timiditycontext_t *c, int c1,int c2);
static  int     mime_begin(struct timiditycontext_t *c, SFILE *f);
static  int     mime_getc(struct timiditycontext_t *c, SFILE *f);
static  int     mime_ungetc(struct timiditycontext_t *c, unsigned int ch);
#ifdef STRICT_MIME
static  int     mime_integrity(SFILE *f,unsigned char *p);
#endif
static  int     base64decode(int c);
#if 0
static  int     usage(void);
static  void    arguments(char *c);
#endif
static  void    reinit(struct timiditycontext_t *c);

/* MIME preprocessor fifo */

#define MIME_BUF_MASK   (MIME_BUF_SIZE-1)
#define Fifo(n)         c->mime_buf[(n)&MIME_BUF_MASK]

/* X0208 -> ASCII converter */

/* Folding */

#define FOLD_MARGIN  10
#define DEFAULT_FOLD 60

/* converters */

#ifdef DEFAULT_CODE_JIS
#   define  DEFAULT_CONV j_oconv
#endif
#ifdef DEFAULT_CODE_SJIS
#   define  DEFAULT_CONV s_oconv
#endif
#ifdef DEFAULT_CODE_EUC
#   define  DEFAULT_CONV e_oconv
#endif

#define         DEFAULT_J       'B'
#define         DEFAULT_R       'B'

/* X0201 / X0208 conversion tables */

/* X0201 kana conversion table */
/* 90-9F A0-DF */
static const unsigned char cv[]= {
0x21,0x21,0x21,0x23,0x21,0x56,0x21,0x57,
0x21,0x22,0x21,0x26,0x25,0x72,0x25,0x21,
0x25,0x23,0x25,0x25,0x25,0x27,0x25,0x29,
0x25,0x63,0x25,0x65,0x25,0x67,0x25,0x43,
0x21,0x3c,0x25,0x22,0x25,0x24,0x25,0x26,
0x25,0x28,0x25,0x2a,0x25,0x2b,0x25,0x2d,
0x25,0x2f,0x25,0x31,0x25,0x33,0x25,0x35,
0x25,0x37,0x25,0x39,0x25,0x3b,0x25,0x3d,
0x25,0x3f,0x25,0x41,0x25,0x44,0x25,0x46,
0x25,0x48,0x25,0x4a,0x25,0x4b,0x25,0x4c,
0x25,0x4d,0x25,0x4e,0x25,0x4f,0x25,0x52,
0x25,0x55,0x25,0x58,0x25,0x5b,0x25,0x5e,
0x25,0x5f,0x25,0x60,0x25,0x61,0x25,0x62,
0x25,0x64,0x25,0x66,0x25,0x68,0x25,0x69,
0x25,0x6a,0x25,0x6b,0x25,0x6c,0x25,0x6d,
0x25,0x6f,0x25,0x73,0x21,0x2b,0x21,0x2c,
0x00,0x00};


/* X0201 kana conversion table for daguten */
/* 90-9F A0-DF */
static const unsigned char dv[]= {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x25,0x2c,0x25,0x2e,
0x25,0x30,0x25,0x32,0x25,0x34,0x25,0x36,
0x25,0x38,0x25,0x3a,0x25,0x3c,0x25,0x3e,
0x25,0x40,0x25,0x42,0x25,0x45,0x25,0x47,
0x25,0x49,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x25,0x50,0x25,0x53,
0x25,0x56,0x25,0x59,0x25,0x5c,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00};

/* X0201 kana conversion table for han-daguten */
/* 90-9F A0-DF */
static const unsigned char ev[]= {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x25,0x51,0x25,0x54,
0x25,0x57,0x25,0x5a,0x25,0x5d,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00};


/* X0208 kigou conversion table */
/* 0x8140 - 0x819e */
static const unsigned char fv[] = {
0x00,0x00,0x00,0x00,0x2c,0x2e,0x00,0x3a,
0x3b,0x3f,0x21,0x00,0x00,0x27,0x60,0x00,
0x5e,0x00,0x5f,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x2d,0x00,0x2f,
0x5c,0x00,0x00,0x7c,0x00,0x00,0x60,0x27,
0x22,0x22,0x28,0x29,0x00,0x00,0x5b,0x5d,
0x7b,0x7d,0x3c,0x3e,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x2b,0x2d,0x00,0x00,
0x00,0x3d,0x00,0x3c,0x3e,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x24,0x00,0x00,0x25,0x23,0x26,0x2a,0x40,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
} ;


/* SFILE 関連関数 */

static SFILE *
ssopen(struct timiditycontext_t *c, SFILE *sf, char *string, signed int maxsize, char *md)
{
  char *st;
  strcpy(sf->mode,md);
  if (strstr(sf->mode,"newstr"))
  {
      if(maxsize <= sizeof(c->sfile_buffer))
	  st = c->sfile_buffer;
      else
	  st = (char *)safe_malloc(c, maxsize);
  }
  else
    st=string;
  sf->pointer=sf->head=(unsigned char *)st;
  if (strstr(sf->mode,"stdout"))
    _sstdout=sf;
  else if (strstr(sf->mode,"stdin"))
  {
    _sstdin=sf;
    maxsize=strlen((char *)st);
  }
  sf->tail=sf->head+maxsize;
  return sf;
}

static void
sclose(struct timiditycontext_t *c, SFILE *sf)
{
  if (sf==NULL)
    return;
  if (strstr(sf->mode,"stdout"))
      _sstdout=NULL;
  if (strstr(sf->mode,"stdin"))
      _sstdin=NULL;
  if (strstr(sf->mode,"newstr") && sf->head != (unsigned char *)c->sfile_buffer)
      free(sf->head);
}

static int
sgetc(SFILE *sf)
{
  if (sf==NULL)
    return SEOF;
  if(sf->pointer<sf->tail)
      return (int)*sf->pointer++;
  return SEOF;
}

static int
sungetc(int ch, SFILE *sf)
{
  if (sf==NULL)
    return SEOF;
  if (sf->head<sf->pointer) {
    *--sf->pointer=(unsigned char)ch;
    return ch;
  } else
    return SEOF;
}

static int
sputc(int c, SFILE *sf)
{
  if (sf==NULL)
    return SEOF;
  if (sf->pointer<sf->tail)
      return (int)(*sf->pointer++=(unsigned char)c);
  return SEOF;
}

/* public 関数 start */

/* nkf 漢字コンバート関数 */
/* si must be terminated with '\0' */
char *
nkf_convert(struct timiditycontext_t *c, char *si, char *so, int maxsize, char *in_mode, char *out_mode)
{
/* 前処理 */
  SFILE *fi,*fo;
  SFILE xfi,xfo;
  int a;

  reinit(c); /* 使用？ */

  if(maxsize == -1)
    maxsize = SAFE_CONVERT_LENGTH(strlen(si));
  else if(maxsize == 0)
    return si;

  fi = &xfi;
  fo = &xfo;
  if (so!=NULL) {
    ssopen(c, fi,si,0,"stdin");
    ssopen(c, fo,so,maxsize,"stdout");
  } else {
    ssopen(c, fi,si,0,"stdin");
    ssopen(c, fo,so,maxsize,"newstr stdout");
  }

/* 変数をデフォルト設定 */
  c->unbuf_f = FALSE;
  c->estab_f = FALSE;
  c->rot_f = FALSE;	/* rot14/43 mode */
  c->input_f = FALSE;	/* non fixed input code	 */
  c->alpha_f = FALSE;	/* convert JIx0208 alphbet to ASCII */
  c->mime_f = FALSE;	/* convert MIME base64 */
  c->broken_f = FALSE;	/* convert ESC-less broken JIS */
  c->iso8859_f = FALSE;	/* ISO8859 through */
#ifdef MSDOS
  c->x0201_f = TRUE;	/* Assume JISX0201 kana */
#else
  c->x0201_f = NO_X0201;	/* Assume NO JISX0201 */
#endif
  c->line = 0;	/* chars in line */
  c->prev = 0;
  c->fold_f  = FALSE;
  c->fold_len  = 0;
  c->kanji_intro = DEFAULT_J;
  c->ascii_intro = DEFAULT_R;
  c->output_mode = ASCII;	/* output kanji mode */
  c->input_mode = ASCII;	/* input kanji mode */
  c->shift_mode = FALSE;	/* TRUE shift out, or X0201  */
  c->mime_mode = FALSE;	/* MIME mode B base64, Q hex */

#if	0
/* No X0201->X0208 conversion 半角カナを有効に*/
  c->x0201_f = FALSE;
#else
/* 半角カナを全角にする */
  c->x0201_f = TRUE;
#endif

/* オプション mode 解析 */
  c->oconv=e_oconv;
  if (strstr(out_mode,"EUCK")||strstr(out_mode,"euck")||strstr(out_mode,"ujisk")){
    /*Hankaku Enable (For WRD File )*/
    c->oconv=e_oconv;
    /* No X0201->X0208 conversion 半角カナを有効に*/
    c->x0201_f = FALSE;
  }
  else if (strstr(out_mode,"SJISK")||strstr(out_mode,"sjisk")){
    /*Hankaku Enable (For WRD File )*/
    c->oconv=s_oconv;
    /* No X0201->X0208 conversion 半角カナを有効に*/
    c->x0201_f = FALSE;
  }
  else if (strstr(out_mode,"JISK")||strstr(out_mode,"jisk")){
    /*Hankaku Enable (For WRD File )*/
    c->oconv=j_oconv;
    /* No X0201->X0208 conversion 半角カナを有効に*/
    c->x0201_f = FALSE;
  }
  else if (strstr(out_mode,"EUC")||strstr(out_mode,"euc")||strstr(out_mode,"ujis"))
    c->oconv=e_oconv;
  else if (strstr(out_mode,"SJIS")||strstr(out_mode,"sjis"))
    c->oconv=s_oconv;
  else if (strstr(out_mode,"JIS")||strstr(out_mode,"jis"))
    c->oconv=j_oconv;
  /* 読み込みコードのチェック */
  c->input_f = -1;
  if(in_mode != NULL)
  {
      if(strstr(in_mode,"EUC")||strstr(in_mode,"euc")||strstr(in_mode,"ujis"))
	  c->input_f = JIS_INPUT;
      else if (strstr(in_mode,"SJIS")||strstr(in_mode,"sjis"))
	  c->input_f = SJIS_INPUT;
      else if (strstr(in_mode,"JIS")||strstr(in_mode,"jis"))
	  c->input_f = JIS_INPUT;
  }
  if(c->input_f == -1)
  {
      /* Auto detect */
      c->input_f = check_kanji_code((unsigned char *)si);
      if(c->input_f == -1)
	  c->input_f = SJIS_INPUT;
      else if(c->input_f == EUC_INPUT)
	  c->input_f = JIS_INPUT;
      if(c->input_f == SJIS_INPUT && c->x0201_f == NO_X0201)
	  c->x0201_f = TRUE;
  }

  /* コンバート */
  kanji_convert(c, fi);

/* 後処理 */
  sputchar('\0');
  if (so==NULL) {
    /* Copy `fo' buffer to `si' */

    a = fo->pointer - fo->head; /* Stored length */
    if(a > maxsize)
	a = maxsize;
    memcpy(si, fo->head, a); /* Do copy */
    so = si;
  }
  sclose(c, fi);
  sclose(c, fo);
  return so;
}

char *
nkf_conv(struct timiditycontext_t *c, char *si, char *so, char *mode)
{
  return nkf_convert(c, si,so,-1,NULL,mode);
}

/* public 関数 end */

#define IS_SJIS_HANKAKU(c)	(0xa0 <= (c) && (c) <= 0xdf)
#define IS_SJIS_BYTE1(c)	((0x81 <= (c) && (c) <= 0x9f) ||\
				 (0xe0 <= (c) && (c) <= 0xfc))
#define IS_SJIS_BYTE2(c)	((0x40 <= (c) && (c) <= 0x7e) ||\
				 (0x80 <= (c) && (c) <= 0xfc))

#define IS_EUC_BYTE1(c)		(0xa1 <= (c) && (c) <= 0xf4)
#ifdef EUC_STRICT_CHECK
#define IS_EUC_BYTE2(c)		(0xa1 <= (c) && (c) <= 0xfe)
#else
#define IS_EUC_BYTE2(c)		(0xa0 <= (c) && (c) <= 0xff)
#endif /* EUC_STRICT_CHECK */


#ifdef EUC_STRICT_CHECK
#define EUC_GAP_LIST_SIZE (16*2)
static unsigned int euc_gap_list[EUC_GAP_LIST_SIZE] =
{
    0xa2af, 0xa2b9,
    0xa2c2, 0xa2c9,
    0xa2d1, 0xa2db,
    0xa2eb, 0xa2f1,
    0xa2fa, 0xa2fd,
    0xa3a1, 0xa3af,
    0xa3ba, 0xa3c0,
    0xa3db, 0xa3e0,
    0xa3fb, 0xa3fe,
    0xa4f4, 0xa4fe,
    0xa5f7, 0xa5fe,
    0xa6b9, 0xa6c0,
    0xa6d9, 0xa6fe,
    0xa7c2, 0xa7d0,
    0xa7f2, 0xa7fe,
    0xa8c1, 0xaffe
};
#endif /* EUC_STRICT_CHECK */

static int check_kanji_code(unsigned char *p)
{
    int c1, c2, mode;
    int noteuc;

    /* check JIS or ASCII code */
    mode = ASCII;
    while(*p)
    {
	if(*p < SPACE || *p >= DEL)
	{
	    if(*p == ESC)
		return JIS_INPUT;
	    mode = -1; /* None ASCII */
	    break;
	}
	p++;
    }
    if(mode == ASCII)
	return ASCII;

    /* EUC or SJIS */
    noteuc = 0;
    while(*p)
    {
        /* skip ASCII */
        while(*p && *p <= DEL)
	    p++;

	if(!*p)
	    return -1;
	c1 = p[0];
	c2 = p[1];
	if(c2 == 0)
	{
	    if(IS_SJIS_HANKAKU(c1))
		return SJIS_INPUT;
	    return -1;
	}

	if(IS_SJIS_HANKAKU(c1))
	{
#ifdef EUC_STRICT_CHECK
	    unsigned int c;
#endif /* EUC_STRICT_CHECK */
/*
            0xa0   0xa1              0xdf   0xf4   0xfe
             |<-----+---- SH -------->|      |      |     SH: SJIS-HANKAKU
                    |<------- E1 ----------->|      |     E1: EUC (MSB)
                    |<--------E2------------------->|     E2: EUC (LSB)
*/
	    if(!IS_EUC_BYTE1(c1) || !IS_EUC_BYTE2(c2))
		return SJIS_INPUT;
	    if(!IS_SJIS_HANKAKU(c2)) /* (0xdf..0xfe] */
		return EUC_INPUT;
#ifdef EUC_STRICT_CHECK
	    if(!noteuc)
	    {
		int i;
		/* Checking more strictly */
		c = (((unsigned int)c1)<<8 | (unsigned int)c2);
		for(i = 0; i < EUC_GAP_LIST_SIZE; i += 2)
		    if(euc_gap_list[i] <= c && c <= euc_gap_list[i + 1])
		    {
			noteuc = 1;
			break;
		    }
	    }
#endif /* EUC_STRICT_CHECK */
	    p += 2;
	}
	else if(IS_SJIS_BYTE1(c1) && IS_SJIS_BYTE2(c2))
	{
	    if(!(IS_EUC_BYTE1(c1) && IS_EUC_BYTE2(c2)))
		return SJIS_INPUT;
	    p += 2;
	}
	else if(IS_EUC_BYTE1(c1) && IS_EUC_BYTE2(c2))
	{
	    return EUC_INPUT;
	}
	else
	    p++; /* What?  Is this japanese?  Try check again. */
    }
    if(noteuc)
	return SJIS_INPUT;
    return -1;
}

#ifdef EUC_STRICT_CHECK
static void fix_euc_code(unsigned char *s, int len)
{
    int i, j, c;

    for(i = 0; i < len - 1; i++)
    {
	if(s[i] & 0x80)
	{
	    c = (((unsigned int)s[i])<<8 | (unsigned int)s[i + 1]);
	    for(j = 0; j < EUC_GAP_LIST_SIZE; j += 2)
		if(euc_gap_list[j] <= c && c <= euc_gap_list[j + 1])
		{
		    s[i] = 0xa1;
		    s[i + 1] = 0xa1;
		    break;
		}
	    i++;
	}
    }
}
#endif /* EUC_STRICT_CHECK */



#if 0
#ifndef PERL_XS
int
main(argc, argv)
    int             argc;
    char          **argv;
{
    FILE  *fin;
    char  *cp;

#ifdef EASYWIN /*Easy Win */
    _BufferSize.y = 400;/*Set Scroll Buffer Size*/
#endif

    for (argc--,argv++; (argc > 0) && **argv == '-'; argc--, argv++) {
        cp = *argv;
	arguments(cp);
    }

    if(c->iso8859_f && (c->oconv != j_oconv || !c->x0201_f )) {
        fprintf(stderr,"Mixed ISO8859/JISX0201/SJIS/EUC output is not allowed.\n");
        exit(1);
    }

    if(c->binmode_f == TRUE)
#ifdef __OS2__
    if(freopen("","wb",stdout) == NULL)
        return (-1);
#else
    setbinmode(stdout);
#endif

    if(c->unbuf_f)
      setbuf(stdout, (char *) NULL);
    else
      setvbuffer(stdout, stdobuf, IOBUF_SIZE);

    if(argc == 0) {
      if(c->binmode_f == TRUE)
#ifdef __OS2__
      if(freopen("","rb",stdin) == NULL) return (-1);
#else
      setbinmode(stdin);
#endif
      setvbuffer(stdin, stdibuf, IOBUF_SIZE);
      if(c->nop_f)
          noconvert(stdin);
      else
          kanji_convert(c, stdin);
    } else {
      while (argc--) {
          if((fin = fopen(*argv++, "r")) == NULL) {
              perror(*--argv);
              return(-1);
          } else {
/* reopen file for stdout */
              if(c->file_out == TRUE){
                  if(argc == 1 ) {
                      if(freopen(*argv++, "w", stdout) == NULL) {
                          perror(*--argv);
                          return (-1);
                      }
                      argc--;
                  } else {
                      if(freopen("nkf.out", "w", stdout) == NULL) {
                         perror(*--argv);
                         return (-1);
                      }
                  }
                  if(c->binmode_f == TRUE) {
#ifdef __OS2__
                      if(freopen("","wb",stdout) == NULL)
                           return (-1);
#else
                      setbinmode(stdout);
#endif
                  }
              }
              if(c->binmode_f == TRUE)
#ifdef __OS2__
                 if(freopen("","rb",fin) == NULL)
                    return (-1);
#else
                 setbinmode(fin);
#endif
              setvbuffer(fin, stdibuf, IOBUF_SIZE);
              if(c->nop_f)
                  noconvert(fin);
              else
                  kanji_convert(c, fin);
              fclose(fin);
          }
      }
    }
#ifdef EASYWIN /*Easy Win */
    if(c->file_out == FALSE)
        scanf("%d",&end_check);
    else
        fclose(stdout);
#else /* for Other OS */
    if(c->file_out == TRUE)
        fclose(stdout);
#endif
    return (0);
}
#endif

#if 0
void
arguments(char *cp)
{
    while (*cp) {
	switch (*cp++) {
	case 'b':           /* buffered mode */
	    c->unbuf_f = FALSE;
	    continue;
	case 'u':           /* non bufferd mode */
	    c->unbuf_f = TRUE;
	    continue;
	case 't':           /* transparent mode */
	    c->nop_f = TRUE;
	    continue;
	case 'j':           /* JIS output */
	case 'n':
	    c->oconv = j_oconv;
	    continue;
	case 'e':           /* AT&T EUC output */
	    c->oconv = e_oconv;
	    continue;
	case 's':           /* SJIS output */
	    c->oconv = s_oconv;
	    continue;
	case 'l':           /* ISO8859 Latin-1 support, no conversion */
	    c->iso8859_f = TRUE;  /* Only compatible with ISO-2022-JP */
	    c->input_f = LATIN1_INPUT;
	    continue;
	case 'i':           /* Kanji IN ESC-$-@/B */
	    if(*cp=='@'||*cp=='B')
		c->kanji_intro = *cp++;
	    continue;
	case 'o':           /* ASCII IN ESC-(-J/B */
	    if(*cp=='J'||*cp=='B'||*cp=='H')
		c->ascii_intro = *cp++;
	    continue;
	case 'r':
	    c->rot_f = TRUE;
	    continue;
#if defined(MSDOS) || defined(__OS2__)
	case 'T':
	    c->binmode_f = FALSE;
	    continue;
#endif
#ifndef PERL_XS
	case 'v':
	    usage();
	    exit(1);
	    break;
#endif
	/* Input code assumption */
	case 'J':   /* JIS input */
	case 'E':   /* AT&T EUC input */
	    c->input_f = JIS_INPUT;
	    continue;
	case 'S':   /* MS Kanji input */
	    c->input_f = SJIS_INPUT;
	    if(c->x0201_f==NO_X0201) c->x0201_f=TRUE;
	    continue;
	case 'Z':   /* Convert X0208 alphabet to asii */
	    /*  bit:0   Convert X0208
		bit:1   Convert Kankaku to one space
		bit:2   Convert Kankaku to two spaces
	    */
	    if('9'>= *cp && *cp>='0')
		c->alpha_f |= 1<<(*cp++ -'0');
	    else
		c->alpha_f |= TRUE;
	    continue;
	case 'x':   /* Convert X0201 kana to X0208 or X0201 Conversion */
	    c->x0201_f = FALSE;    /* No X0201->X0208 conversion */
	    /* accept  X0201
		    ESC-(-I     in JIS, EUC, MS Kanji
		    SI/SO       in JIS, EUC, MS Kanji
		    SSO         in EUC, JIS, not in MS Kanji
		    MS Kanji (0xa0-0xdf)
	       output  X0201
		    ESC-(-I     in JIS (0x20-0x5f)
		    SSO         in EUC (0xa0-0xdf)
		    0xa0-0xd    in MS Kanji (0xa0-0xdf)
	    */
	    continue;
	case 'X':   /* Assume X0201 kana */
	    /* Default value is NO_X0201 for EUC/MS-Kanji mix */
	    c->x0201_f = TRUE;
	    continue;
	case 'f':   /* folding -f60 or -f */
	    c->fold_f = TRUE;
	    c->fold_len = atoi(cp);
	    if(!(0<c->fold_len && c->fold_len<NKFLIB_BUFSIZ))
		c->fold_len = DEFAULT_FOLD;
	    while('0'<= *cp && *cp <='9') cp++;
	    continue;
	case 'm':   /* MIME support */
	    c->mime_f = TRUE;
	    if(*cp=='B'||*cp=='Q') {
		c->mime_mode = *cp++;
		c->mimebuf_f = FIXED_MIME;
	    } else if (*cp=='0') {
		c->mime_f = FALSE;
	    }
	    continue;
	case 'M':   /* MIME output */
	    c->oconv = j_oconv;    /* sorry... not yet done.. */
	    continue;
	case 'B':   /* Broken JIS support */
	    /*  bit:0   no ESC JIS
		bit:1   allow any x on ESC-(-x or ESC-$-x
		bit:2   reset to ascii on NL
	    */
	    if('9'>= *cp && *cp>='0')
		c->broken_f |= 1<<(*cp++ -'0');
	    else
		c->broken_f |= TRUE;
	    continue;
#ifndef PERL_XS
	case 'O':/* for Output file */
	    c->file_out = TRUE;
	    continue;
#endif
	case 'c':/* add cr code */
	    c->add_cr = TRUE;
	    continue;
	case 'd':/* delete cr code */
	    c->del_cr = TRUE;
	    continue;
	default:
	    /* bogus option but ignored */
	    continue;
	}
    }
}
#endif
#endif

#if 0
int
noconvert(f)
    SFILE  *f;
{
    int    c;

    while ((c = sgetc(f)) != EOF)
      sputchar(c);
    return 1;
}
#endif

static int
kanji_convert(struct timiditycontext_t *c, SFILE  *f)
{
    int    c1, c2;

    c2 = 0;

    if(c->input_f == JIS_INPUT || c->input_f == LATIN1_INPUT) {
        c->estab_f = TRUE; c->iconv = c->oconv;
    } else if(c->input_f == SJIS_INPUT) {
        c->estab_f = TRUE;  c->iconv = s_iconv;
    } else {
        c->estab_f = FALSE; c->iconv = c->oconv;
    }
    c->input_mode = ASCII;
    c->output_mode = ASCII;
    c->shift_mode = FALSE;

#define NEXT continue      /* no output, get next */
#define SEND ;             /* output c1 and c2, get next */
#define LAST break         /* end of loop, go closing  */

    while ((c1 = GETC(f)) != EOF) {
        if(c2) {
            /* second byte */
            if(c2 > DEL) {
                /* in case of 8th bit is on */
                if(!c->estab_f) {
                    /* in case of not established yet */
                    if(c1 > SSP) {
                        /* It is still ambiguious */
                        h_conv(c, f, c2, c1);
                        c2 = 0;
                        NEXT;
                    } else if(c1 < AT) {
                        /* ignore bogus code */
                        c2 = 0;
                        NEXT;
                    } else {
                        /* established */
                        /* it seems to be MS Kanji */
                        c->estab_f = TRUE;
                        c->iconv = s_iconv;
                        SEND;
                    }
                } else
                    /* in case of already established */
                    if(c1 < AT) {
                        /* ignore bogus code */
                        c2 = 0;
                        NEXT;
                    } else
                        SEND;
            } else
                /* 7 bit code */
                /* it might be kanji shitfted */
                if((c1 == DEL) || (c1 <= SPACE)) {
                    /* ignore bogus first code */
                    c2 = 0;
                    NEXT;
                } else
                    SEND;
        } else {
            /* first byte */
            if(c1 > DEL) {
                /* 8 bit code */
                if(!c->estab_f && !c->iso8859_f) {
                    /* not established yet */
                    if(c1 < SSP) {
                        /* it seems to be MS Kanji */
                        c->estab_f = TRUE;
                        c->iconv = s_iconv;
                    } else if(c1 < 0xe0) {
                        /* it seems to be EUC */
                        c->estab_f = TRUE;
                        c->iconv = c->oconv;
                    } else {
                        /* still ambiguious */
                    }
                    c2 = c1;
                    NEXT;
                } else { /* c->estab_f==TRUE */
                    if(c->iso8859_f) {
                        SEND;
                    } else if(SSP<=c1 && c1<0xe0 && c->iconv == s_iconv) {
                        /* SJIS X0201 Case... */
                        /* This is too arrogant, but ... */
                        if(c->x0201_f==NO_X0201) {
                            c->iconv = c->oconv;
                            c2 = c1;
                            NEXT;
                        } else
                        if(c->x0201_f) {
                            if(dv[(c1-SSP)*2]||ev[(c1-SSP)*2]) {
                            /* look ahead for X0201/X0208conversion */
                                if((c2 = GETC(f)) == EOF) {
                                    (*c->oconv)(c, cv[(c1-SSP)*2],cv[(c1-SSP)*2+1]);
                                    LAST;
                                } else if(c2==(0xde)) { /* 濁点 */
                                    (*c->oconv)(c, dv[(c1-SSP)*2],dv[(c1-SSP)*2+1]);
                                    c2=0;
                                    NEXT;
                                } else if(c2==(0xdf)&&ev[(c1-SSP)*2]) {
                                    /* 半濁点 */
                                    (*c->oconv)(c, ev[(c1-SSP)*2],ev[(c1-SSP)*2+1]);
                                    c2=0;
                                    NEXT;
                                }
                                UNGETC(c2,f); c2 = 0;
                            }
                            (*c->oconv)(c, cv[(c1-SSP)*2],cv[(c1-SSP)*2+1]);
                            NEXT;
                        } else
                            SEND;
                    } else if(c1==SSO && c->iconv != s_iconv) {
                        /* EUC X0201 Case */
                        /* This is too arrogant
                        if(c->x0201_f == NO_X0201) {
                            c->estab_f = FALSE;
                            c2 = 0;
                            NEXT;
                        } */
                        c1 = GETC(f);  /* skip SSO */
                        euc_1byte_check:
                        if(c->x0201_f && SSP<=c1 && c1<0xe0) {
                            if(dv[(c1-SSP)*2]||ev[(c1-SSP)*2]) {
                                if((c2 = GETC(f)) == EOF) {
                                    (*c->oconv)(c, cv[(c1-SSP)*2],cv[(c1-SSP)*2+1]);
                                    LAST;
                                }
                                /* forward lookup 濁点/半濁点 */
                                if(c2 != SSO) {
                                    UNGETC(c2,f); c2 = 0;
                                    (*c->oconv)(c, cv[(c1-SSP)*2],cv[(c1-SSP)*2+1]);
                                    NEXT;
                                } else if((c2 = GETC(f)) == EOF) {
                                    (*c->oconv)(c, cv[(c1-SSP)*2],cv[(c1-SSP)*2+1]);
                                    (*c->oconv)(c, 0,SSO);
                                    LAST;
                                } else if(c2==(0xde)) { /* 濁点 */
                                    (*c->oconv)(c, dv[(c1-SSP)*2],dv[(c1-SSP)*2+1]);
                                    c2=0;
                                    NEXT;
                                } else if(c2==(0xdf)&&ev[(c1-SSP)*2]) {
                                    /* 半濁点 */
                                    (*c->oconv)(c, ev[(c1-SSP)*2],ev[(c1-SSP)*2+1]);
                                    c2=0;
                                    NEXT;
                                } else {
                                    (*c->oconv)(c, cv[(c1-SSP)*2],cv[(c1-SSP)*2+1]);
                                    /* we have to check this c2 */
                                    /* and no way to push back SSO */
                                    c1 = c2; c2 = 0;
                                    goto euc_1byte_check;
                                }
                            }
                            (*c->oconv)(c, cv[(c1-SSP)*2],cv[(c1-SSP)*2+1]);
                            NEXT;
                        } else
                            SEND;
                    } else if(c1 < SSP && c->iconv != s_iconv) {
                        /* strange code in EUC */
                        c->iconv = s_iconv;  /* try SJIS */
                        c2 = c1;
                        NEXT;
                    } else {
                       /* already established */
                       c2 = c1;
                       NEXT;
                    }
                }
            } else if((c1 > SPACE) && (c1 != DEL)) {
                /* in case of Roman characters */
                if(c->shift_mode) {
                    c1 |= 0x80;
                    /* output 1 shifted byte */
                    if(c->x0201_f && (!c->iso8859_f||c->input_mode==X0201) &&
                            SSP<=c1 && c1<0xe0 ) {
                        if(dv[(c1-SSP)*2]||ev[(c1-SSP)*2]) {
                            if((c2 = GETC(f)) == EOF) {
                                (*c->oconv)(c, cv[(c1-SSP)*2],cv[(c1-SSP)*2+1]);
                                LAST;
                            } else if(c2==(0xde&0x7f)) { /* 濁点 */
                                (*c->oconv)(c, dv[(c1-SSP)*2],dv[(c1-SSP)*2+1]);
                                c2=0;
                                NEXT;
                            } else if(c2==(0xdf&0x7f)&&ev[(c1-SSP)*2]) {
                                /* 半濁点 */
                                (*c->oconv)(c, ev[(c1-SSP)*2],ev[(c1-SSP)*2+1]);
                                c2=0;
                                NEXT;
                            }
                            UNGETC(c2,f); c2 = 0;
                        }
                        (*c->oconv)(c, cv[(c1-SSP)*2],cv[(c1-SSP)*2+1]);
                        NEXT;
                    } else
                        SEND;
                } else if(c1 == '(' && c->broken_f && c->input_mode == X0208
                        && !c->mime_mode ) {
                    /* Try to recover missing escape */
                    if((c1 = GETC(f)) == EOF) {
                        (*c->oconv)(c, 0, '(');
                        LAST;
                    } else {
                        if(c1 == 'B' || c1 == 'J' || c1 == 'H') {
                            c->input_mode = ASCII; c->shift_mode = FALSE;
                            NEXT;
                        } else {
                            (*c->oconv)(c, 0, '(');
                            /* do not modify various c->input_mode */
                            /* It can be vt100 sequence */
                            SEND;
                        }
                    }
                } else if(c->input_mode == X0208) {
                    /* in case of Kanji shifted */
                    c2 = c1;
                    NEXT;
                    /* goto next_byte */
                } else if(c1 == '=' && c->mime_f && !c->mime_mode ) {
                    if((c1 = sgetc(f)) == EOF) {
                        (*c->oconv)(c, 0, '=');
                        LAST;
                    } else if(c1 == '?') {
                        /* =? is mime conversion start sequence */
                        if(mime_begin(c, f) == EOF) /* check in detail */
                            LAST;
                        else
                            NEXT;
                    } else {
                        (*c->oconv)(c, 0, '=');
                        sungetc(c1,f);
                        NEXT;
                    }
                } else if(c1 == '$' && c->broken_f && !c->mime_mode) {
                    /* try to recover missing escape */
                    if((c1 = GETC(f)) == EOF) {
                        (*c->oconv)(c, 0, '$');
                        LAST;
                    } else if(c1 == '@'|| c1 == 'B') {
                        /* in case of Kanji in ESC sequence */
                        c->input_mode = X0208;
                        c->shift_mode = FALSE;
                        NEXT;
                    } else {
                        /* sorry */
                        (*c->oconv)(c, 0, '$');
                        (*c->oconv)(c, 0, c1);
                        NEXT;
                    }
                } else
                    SEND;
            } else if(c1 == SI) {
                c->shift_mode = FALSE;
                NEXT;
            } else if(c1 == SO) {
                c->shift_mode = TRUE;
                NEXT;
            } else if(c1 == ESC ) {
                if((c1 = GETC(f)) == EOF) {
                    (*c->oconv)(c, 0, ESC);
                    LAST;
                } else if(c1 == '$') {
                    if((c1 = GETC(f)) == EOF) {
                        (*c->oconv)(c, 0, ESC);
                        (*c->oconv)(c, 0, '$');
                        LAST;
                    } else if(c1 == '@'|| c1 == 'B') {
                        /* This is kanji introduction */
                        c->input_mode = X0208;
                        c->shift_mode = FALSE;
                        NEXT;
                    } else if(c1 == '(') {
			if((c1 = GETC(f)) == EOF) {
			    (*c->oconv)(c, 0, ESC);
			    (*c->oconv)(c, 0, '$');
			    (*c->oconv)(c, 0, '(');
			    LAST;
			} else if(c1 == '@'|| c1 == 'B') {
			    /* This is kanji introduction */
			    c->input_mode = X0208;
			    c->shift_mode = FALSE;
			    NEXT;
			} else {
			    (*c->oconv)(c, 0, ESC);
			    (*c->oconv)(c, 0, '$');
			    (*c->oconv)(c, 0, '(');
			    (*c->oconv)(c, 0, c1);
			    NEXT;
			}
                    } else if(c->broken_f&0x2) {
                        c->input_mode = X0208;
                        c->shift_mode = FALSE;
                        NEXT;
                    } else {
                        (*c->oconv)(c, 0, ESC);
                        (*c->oconv)(c, 0, '$');
                        (*c->oconv)(c, 0, c1);
                        NEXT;
                    }
                } else if(c1 == '(') {
                    if((c1 = GETC(f)) == EOF) {
                        (*c->oconv)(c, 0, ESC);
                        (*c->oconv)(c, 0, '(');
                        LAST;
                    } else {
                        if(c1 == 'I') {
                            /* This is X0201 kana introduction */
                            c->input_mode = X0201; c->shift_mode = X0201;
                            NEXT;
                        } else if(c1 == 'B' || c1 == 'J' || c1 == 'H') {
                            /* This is X0208 kanji introduction */
                            c->input_mode = ASCII; c->shift_mode = FALSE;
                            NEXT;
                        } else if(c->broken_f&0x2) {
                            c->input_mode = ASCII; c->shift_mode = FALSE;
                            NEXT;
                        } else {
                            (*c->oconv)(c, 0, ESC);
                            (*c->oconv)(c, 0, '(');
                            /* maintain various c->input_mode here */
                            SEND;
                        }
                    }
                } else {
                    /* lonely ESC  */
                    (*c->oconv)(c, 0, ESC);
                    SEND;
                }
            } else if(c1 == NL && c->broken_f&4) {
                c->input_mode = ASCII;
                SEND;
            } else
                SEND;
        }
        /* send: */
        if(c->input_mode == X0208)
            (*c->oconv)(c, c2, c1);  /* this is JIS, not SJIS/EUC case */
        else
            (*c->iconv)(c, c2, c1);  /* can be EUC/SJIS */
        c2 = 0;
        continue;
        /* goto next_word */
    }

    /* epilogue */
    (*c->iconv)(c, EOF, 0);
    return 1;
}




static int
h_conv(struct timiditycontext_t *c, SFILE  *f, int c2, int c1)
{
    int    wc;


    /** it must NOT be in the kanji shifte sequence      */
    /** it must NOT be written in JIS7                   */
    /** and it must be after 2 byte 8bit code            */

    c->hold_count = 0;
    push_hold_buf(c, c2, c1);
    c2 = 0;

    while ((c1 = GETC(f)) != EOF) {
        if(c2) {
            /* second byte */
            if(!c->estab_f) {
                /* not established */
                if(c1 > SSP) {
                    /* it is still ambiguious yet */
                    SEND;
                } else if(c1 < AT) {
                    /* ignore bogus first byte */
                    c2 = 0;
                    SEND;
                } else {
                    /* now established */
                    /* it seems to be MS Kanji */
                    c->estab_f = TRUE;
                    c->iconv = s_iconv;
                    SEND;
                }
            } else
                SEND;
        } else {
            /* First byte */
            if(c1 > DEL) {
                /* 8th bit is on */
                if(c1 < SSP) {
                    /* it seems to be MS Kanji */
                    c->estab_f = TRUE;
                    c->iconv = s_iconv;
                } else if(c1 < 0xe0) {
                    /* it seems to be EUC */
                    c->estab_f = TRUE;
                    c->iconv = c->oconv;
                } else {
                    /* still ambiguious */
                }
                c2 = c1;
                NEXT;
            } else
            /* 7 bit code , then send without any process */
                SEND;
        }
        /* send: */
        if((push_hold_buf(c, c2, c1) == EOF) || c->estab_f)
            break;
        c2 = 0;
        continue;
    }

    /** now,
     ** 1) EOF is detected, or
     ** 2) Code is established, or
     ** 3) Buffer is FULL (but last word is pushed)
     **
     ** in 1) and 3) cases, we continue to use
     ** Kanji codes by c->oconv and leave c->estab_f unchanged.
     **/

    for (wc = 0; wc < c->hold_count; wc += 2) {
        c2 = c->hold_buf[wc];
        c1 = c->hold_buf[wc+1];
        (*c->iconv)(c, c2, c1);
    }
    return VOIDVOID;
}



static int
push_hold_buf(struct timiditycontext_t *c, int c2, int c1)
{
    if(c->hold_count >= HOLD_SIZE*2)
        return (EOF);
    c->hold_buf[c->hold_count++] = c2;
    c->hold_buf[c->hold_count++] = c1;
    return ((c->hold_count >= HOLD_SIZE*2) ? EOF : c->hold_count);
}


static int
s_iconv(struct timiditycontext_t *c, int c2, int c1)
{
    if((c2 == EOF) || (c2 == 0)) {
        /* NOP */
    } else {
        c2 = c2 + c2 - ((c2 <= 0x9f) ? SJ0162 : SJ6394);
        if(c1 < 0x9f)
            c1 = c1 - ((c1 > DEL) ? SPACE : 0x1f);
        else {
            c1 = c1 - 0x7e;
            c2++;
        }
    }
    (*c->oconv)(c, c2, c1);
    return 1;
}


static int
e_oconv(struct timiditycontext_t *c, int c2, int c1)
{
    c2 = pre_convert(c, c1,c2); c1 = c->c1_return;
    if(c->fold_f) {
        switch(line_fold(c, c2,c1)) {
            case '\n':
                if(c->add_cr == TRUE) {
                    sputchar('\r');
                    c1 = '\n';
                }
                sputchar('\n');
                break;
            case 0:    return VOIDVOID;
            case '\r':
                c1 = '\n'; c2 = 0;
                break;
            case '\t':
            case ' ':
                c1 = ' '; c2 = 0;
                break;
        }
    }
    if(c2==DOUBLE_SPACE) {
        sputchar(' '); sputchar(' ');
        return VOIDVOID;
    }
    if(c2 == EOF)
        return VOIDVOID;
    else if(c2 == 0 && (c1&0x80)) {
        sputchar(SSO); sputchar(c1);
    } else if(c2 == 0) {
        if(c1 == '\n' && c->add_cr == TRUE)
            sputchar('\r');
        if(c1 != '\r')
            sputchar(c1);
        else if(c->del_cr == FALSE)
            sputchar(c1);
    } else {
        if((c1<0x20 || 0x7e<c1) ||
           (c2<0x20 || 0x7e<c2)) {
            c->estab_f = FALSE;
            return VOIDVOID; /* too late to rescue this char */
        }
        sputchar(c2 | 0x080);
        sputchar(c1 | 0x080);
    }
    return VOIDVOID;
}



static int
s_oconv(struct timiditycontext_t *c, int c2, int c1)
{
    c2 = pre_convert(c, c1,c2); c1 = c->c1_return;
    if(c->fold_f) {
        switch(line_fold(c, c2,c1)) {
            case '\n':
                if(c->add_cr == TRUE) {
                   sputchar('\r');
                   c1 = '\n';
                }
                sputchar('\n');
                break;
            case '\r':
                c1 = '\n'; c2 = 0;
                break;
            case 0:    return VOIDVOID;
            case '\t':
            case ' ':
                c1 = ' '; c2 = 0;
                break;
        }
    }
    if(c2==DOUBLE_SPACE) {
        sputchar(' '); sputchar(' ');
        return VOIDVOID;
    }
    if(c2 == EOF)
        return VOIDVOID;
    else if(c2 == 0) {
        if(c1 == '\n' && c->add_cr == TRUE)
            sputchar('\r');
        if(c1 != '\r')
            sputchar(c1);
        else if(c->del_cr == FALSE)
            sputchar(c1);
    } else {
        if((c1<0x20 || 0x7e<c1) ||
           (c2<0x20 || 0x7e<c2)) {
            c->estab_f = FALSE;
            return VOIDVOID; /* too late to rescue this char */
        }
        sputchar((((c2 - 1) >> 1) + ((c2 <= 0x5e) ? 0x71 : 0xb1)));
        sputchar((c1 + ((c2 & 1) ? ((c1 < 0x60) ? 0x1f : 0x20) : 0x7e)));
    }
    return VOIDVOID;
}

static int
j_oconv(struct timiditycontext_t *c, int c2, int c1)
{
    c2 = pre_convert(c, c1,c2); c1 = c->c1_return;
    if(c->fold_f) {
        switch(line_fold(c, c2,c1)) {
            case '\n':
                if(c->output_mode) {
                    sputchar(ESC);
                    sputchar('(');
                    sputchar(c->ascii_intro);
                }
                if(c->add_cr == TRUE) {
                    sputchar('\r');
                    c1 = '\n';
                }
                sputchar('\n');
                c->output_mode = ASCII;
                break;
            case '\r':
                c1 = '\n'; c2 = 0;
                break;
            case '\t':
            case ' ':
                c1 = ' '; c2 = 0;
                break;
            case 0:    return VOIDVOID;
        }
     }
    if(c2 == EOF) {
        if(c->output_mode) {
            sputchar(ESC);
            sputchar('(');
            sputchar(c->ascii_intro);
        }
    } else if(c2 == 0 && (c1 & 0x80)) {
        if(c->input_mode==X0201 || !c->iso8859_f) {
            if(c->output_mode!=X0201) {
                sputchar(ESC);
                sputchar('(');
                sputchar('I');
                c->output_mode = X0201;
            }
            c1 &= 0x7f;
        } else {
            /* iso8859 introduction, or 8th bit on */
            /* Can we convert in 7bit form using ESC-'-'-A ?
               Is this popular? */
        }
        sputchar(c1);
    } else if(c2 == 0) {
        if(c->output_mode) {
            sputchar(ESC);
            sputchar('(');
            sputchar(c->ascii_intro);
            c->output_mode = ASCII;
        }
        if(c1 == '\n' && c->add_cr == TRUE)
            sputchar('\r');
        if(c1 != '\r')
            sputchar(c1);
        else if(c->del_cr == FALSE)
            sputchar(c1);
    } else if(c2 == DOUBLE_SPACE) {
        if(c->output_mode) {
            sputchar(ESC);
            sputchar('(');
            sputchar(c->ascii_intro);
            c->output_mode = ASCII;
        }
        sputchar(' ');
        if(c1 == '\n' && c->add_cr == TRUE)
            sputchar('\r');
        if(c1 != '\r')
            sputchar(c1);
        else if(c->del_cr == FALSE)
            sputchar(c1);
    } else {
        if(c->output_mode != X0208) {
            sputchar(ESC);
            sputchar('$');
            sputchar(c->kanji_intro);
            c->output_mode = X0208;
        }
        if(c1<0x20 || 0x7e<c1)
            return VOIDVOID;
        if(c2<0x20 || 0x7e<c2)
            return VOIDVOID;
        sputchar(c2);
        if(c1 == '\n' && c->add_cr == TRUE)
            sputchar('\r');
        if(c1 != '\r')
            sputchar(c1);
        else if(c->del_cr == FALSE)
            sputchar(c1);
    }
    return VOIDVOID;
}



#define rot13(c)  ( \
      ( c < 'A' ) ? c: \
      (c <= 'M')  ? (c + 13): \
      (c <= 'Z')  ? (c - 13): \
      (c < 'a')   ? (c): \
      (c <= 'm')  ? (c + 13): \
      (c <= 'z')  ? (c - 13): \
      (c) \
)

#define  rot47(c) ( \
      ( c < '!' ) ? c: \
      ( c <= 'O' ) ? (c + 47) : \
      ( c <= '~' ) ?  (c - 47) : \
      c \
)


/*
  Return value of line_fold()

       \n  add newline  and output char
       \r  add newline  and output nothing
       ' ' space
       0   skip
       1   (or else) normal output

  fold state in prev (previous character)

      >0x80 Japanese (X0208/X0201)
      <0x80 ASCII
      \n    new line
      ' '   space

  This fold algorthm does not preserve heading space in a line.
  This is the main difference from fmt.
*/

static int
line_fold(struct timiditycontext_t *c, int c2, int c1)
{
    int prev0;
    if(c1=='\r')
        return 0;               /* ignore cr */
    if(c1== 8) {
        if(c->line>0) c->line--;
        return 1;
    }
    if(c2==EOF && c->line != 0)    /* close open last line */
        return '\n';
    /* new c->line */
    if(c1=='\n') {
        if(c->prev == c1) {        /* duplicate newline */
            if(c->line) {
                c->line = 0;
                return '\n';    /* output two newline */
            } else {
                c->line = 0;
                return 1;
            }
        } else  {
            if(c->prev&0x80) {     /* Japanese? */
                c->prev = c1;
                return 0;       /* ignore given single newline */
            } else if(c->prev==' ') {
                return 0;
            } else {
                c->prev = c1;
                if(++c->line<=c->fold_len)
                    return ' ';
                else {
                    c->line = 0;
                    return '\r';        /* fold and output nothing */
                }
            }
        }
    }
    if(c1=='\f') {
        c->prev = '\n';
        if(c->line==0)
            return 1;
        c->line = 0;
        return '\n';            /* output newline and clear */
    }
    /* X0208 kankaku or ascii space */
    if( (c2==0&&c1==' ')||
        (c2==0&&c1=='\t')||
        (c2==DOUBLE_SPACE)||
        (c2=='!'&& c1=='!')) {
        if(c->prev == ' ') {
            return 0;           /* remove duplicate spaces */
        }
        c->prev = ' ';
        if(++c->line<=c->fold_len)
            return ' ';         /* output ASCII space only */
        else {
            c->prev = ' '; c->line = 0;
            return '\r';        /* fold and output nothing */
        }
    }
    prev0 = c->prev; /* we still need this one... , but almost done */
    c->prev = c1;
    if(c2 || (SSP<=c1 && c1<=0xdf))
        c->prev |= 0x80;  /* this is Japanese */
    c->line += (c2==0)?1:2;
    if(c->line<=c->fold_len) {   /* normal case */
        return 1;
    }
    if(c->line>=c->fold_len+FOLD_MARGIN) { /* too many kinsou suspension */
        c->line = (c2==0)?1:2;
        return '\n';       /* We can't wait, do fold now */
    }
    /* simple kinsoku rules  return 1 means no folding  */
    if(c2==0) {
        if(c1==0xde) return 1; /* ゛*/
        if(c1==0xdf) return 1; /* ゜*/
        if(c1==0xa4) return 1; /* 。*/
        if(c1==0xa3) return 1; /* ，*/
        if(c1==0xa1) return 1; /* 」*/
        if(c1==0xb0) return 1; /* - */
        if(SSP<=c1 && c1<=0xdf) {               /* X0201 */
            c->line = 1;
            return '\n';/* add one new line before this character */
        }
        /* fold point in ASCII { [ ( */
        if(( c1!=')'&&
             c1!=']'&&
             c1!='}'&&
             c1!='.'&&
             c1!=','&&
             c1!='!'&&
             c1!='?'&&
             c1!='/'&&
             c1!=':'&&
             c1!=';')&&
            ((prev0=='\n')|| (prev0==' ')||     /* ignored new line */
            (prev0&0x80))                       /* X0208 - ASCII */
            ) {
            c->line = 1;
            return '\n';/* add one new line before this character */
        }
        return 1;  /* default no fold in ASCII */
    } else {
        if(c2=='!') {
            if(c1=='"')  return 1; /* 、 */
            if(c1=='#')  return 1; /* 。 */
            if(c1=='$')  return 1; /* ， */
            if(c1=='%')  return 1; /* ． */
            if(c1=='\'') return 1; /* ＋ */
            if(c1=='(')  return 1; /* ； */
            if(c1==')')  return 1; /* ？ */
            if(c1=='*')  return 1; /* ！ */
            if(c1=='+')  return 1; /* ゛ */
            if(c1==',')  return 1; /* ゜ */
        }
        c->line = 2;
        return '\n'; /* add one new line before this character */
    }
}

static int
pre_convert(struct timiditycontext_t *c, int c1, int c2)
{
        if(c2) c1 &= 0x7f;
        c->c1_return = c1;
        if(c2==EOF) return c2;
        c2 &= 0x7f;
        if(c->rot_f) {
            if(c2) {
                c1 = rot47(c1);
                c2 = rot47(c2);
            } else {
                if(!(c1 & 0x80))
                    c1 = rot13(c1);
            }
            c->c1_return = c1;
        }
        /* JISX0208 Alphabet */
        if(c->alpha_f && c2 == 0x23 ) return 0;
        /* JISX0208 Kigou */
        if(c->alpha_f && c2 == 0x21 ) {
           if(0x21==c1) {
               if(c->alpha_f&0x2) {
                   c->c1_return = ' ';
                   return 0;
               } else if(c->alpha_f&0x4) {
                   c->c1_return = ' ';
                   return DOUBLE_SPACE;
               } else {
                   return c2;
               }
           } else if(0x20<c1 && c1<0x7f && fv[c1-0x20]) {
               c->c1_return = fv[c1-0x20];
               return 0;
           }
        }
        return c2;
}


#ifdef STRICT_MIME
/* This converts  =?ISO-2022-JP?B?HOGE HOGE?= */

unsigned char *mime_pattern[] = {
   (unsigned char *)"\075?ISO-8859-1?Q?",
   (unsigned char *)"\075?ISO-2022-JP?B?",
   (unsigned char *)"\075?ISO-2022-JP?Q?",
   (unsigned char *)"\075?JAPANESE_EUC?B?",
   (unsigned char *)"\075?SHIFT_JIS?B?",
   NULL
};

int      mime_encode[] = {
    'Q', 'B', 'Q',
    0
};
#endif

#define MAXRECOVER 20

#ifdef STRICT_MIME

#define nkf_toupper(c)  (('a'<=c && c<='z')?(c-('a'-'A')):c)
/* I don't trust portablity of toupper */

static int
mime_begin(struct timiditycontext_t *c, SFILE *f)
{
    int c1;
    int i,j,k;
    unsigned char *p,*q;
    int r[MAXRECOVER];    /* recovery buffer, max mime pattern lenght */

    c->mime_mode = FALSE;
    /* =? has been checked */
    j = 0;
    p = mime_pattern[j];
    r[0]='='; r[1]='?';

    for(i=2;p[i]>' ';i++) {                   /* start at =? */
        if( ((r[i] = c1 = sgetc(f))==EOF) || nkf_toupper(c1) != p[i] ) {
            /* pattern fails, try next one */
            q = p;
            while (p = mime_pattern[++j]) {
                for(k=2;k<i;k++)              /* assume length(p) > i */
                    if(p[k]!=q[k]) break;
                if(k==i && nkf_toupper(c1)==p[k]) break;
            }
            if(p) continue;  /* found next one, continue */
            /* all fails, output from recovery buffer */
            sungetc(c1,f);
            for(j=0;j<i;j++) {
                (*c->oconv)(0,r[j]);
            }
            return c1;
        }
    }
    c->mime_mode = mime_encode[j];
    c->iso8859_f_save = c->iso8859_f;
    if(j==0) {
        c->iso8859_f = TRUE;
    }
    if(c->mime_mode=='B') {
        c->mimebuf_f = c->unbuf_f;
        if(!c->unbuf_f) {
            /* do MIME integrity check */
            return mime_integrity(f,mime_pattern[j]);
        }
    }
    c->mimebuf_f = TRUE;
    return c1;
}

#define mime_getc0(f)   (c->mimebuf_f?sgetc(f):Fifo(c->mime_input++))
#define mime_ungetc0(c,f) (c->mimebuf_f?sungetc(ch,f):c->mime_input--)

#else
static int
mime_begin(struct timiditycontext_t *c, SFILE *f)
{
    int c1;
    int i,j;
    int r[MAXRECOVER];    /* recovery buffer, max mime pattern lenght */

    c->mime_mode = FALSE;
    /* =? has been checked */
    j = 0;
    r[0]='='; r[1]='?';
    for(i=2;i<MAXRECOVER;i++) {                   /* start at =? */
	/* We accept any charcter type even if it is breaked by new lines */
        if( (r[i] = c1 = sgetc(f))==EOF) break;
	if(c1=='=') break;
	if(c1<' '&& c1!='\r' && c1!='\n') break;
	if(c1=='?') {
	    i++;
	    if(!(i<MAXRECOVER) || (r[i] = c1 = sgetc(f))==EOF) break;
	    if(c1=='b'||c1=='B') {
		c->mime_mode = 'B';
	    } else if(c1=='q'||c1=='Q') {
		c->mime_mode = 'Q';
	    } else {
		break;
	    }
	    i++;
	    if(!(i<MAXRECOVER) || (r[i] = c1 = sgetc(f))==EOF) break;
	    if(c1=='?') {
		break;
	    } else {
		c->mime_mode = FALSE;
	    }
	    break;
	}
    }
    if(!c->mime_mode || c1==EOF || i==MAXRECOVER) {
	sungetc(c1,f);
	for(j=0;j<i;j++) {
	    (*c->oconv)(c, 0,r[j]);
	}
	return c1;
    }
    c->iso8859_f_save = c->iso8859_f;
    /* do no MIME integrity check */
    return c1;   /* used only for checking EOF */
}

#define mime_getc0(f)   sgetc(f)
#define mime_ungetc0(ch,f) sungetc(ch,f)

#endif

int
mime_getc(struct timiditycontext_t *c, SFILE *f)
{
    int c1, c2, c3, c4, cc;
    int t1, t2, t3, t4, mode, exit_mode;

    if(c->mime_top != c->mime_last) {  /* Something is in FIFO */
        return  Fifo(c->mime_top++);
    }

    if(c->mimebuf_f == FIXED_MIME)
        exit_mode = c->mime_mode;
    else
        exit_mode = FALSE;
    if(c->mime_mode == 'Q') {
        if((c1 = mime_getc0(f)) == EOF) return (EOF);
        if(c1=='_') return ' ';
        if(c1!='=' && c1!='?')
            return c1;
        c->mime_mode = exit_mode; /* prepare for quit */
        if(c1<=' ') return c1;
        if((c2 = mime_getc0(f)) == EOF) return (EOF);
        if(c2<=' ') return c2;
        if(c1=='?'&&c2=='=') {
            /* end Q encoding */
            c->input_mode = exit_mode;
            c->iso8859_f = c->iso8859_f_save;
            return sgetc(f);
        }
        if(c1=='?') {
            c->mime_mode = 'Q'; /* still in MIME */
            mime_ungetc0(c2,f);
            return c1;
        }
        if((c3 = mime_getc0(f)) == EOF) return (EOF);
        if(c2<=' ') return c2;
        c->mime_mode = 'Q'; /* still in MIME */
#define hex(c)   (('0'<=c&&c<='9')?(c-'0'):\
     ('A'<=c&&c<='F')?(c-'A'+10):('a'<=c&&c<='f')?(c-'a'+10):0)
        return ((hex(c2)<<4) + hex(c3));
    }

    if(c->mime_mode != 'B') {
        c->mime_mode = FALSE;
        return sgetc(f);
    }


    /* Base64 encoding */
    /*
        MIME allows line break in the middle of
        Base64, but we are very pessimistic in decoding
        in unbuf mode because MIME encoded code may broken by
        less or editor's control sequence (such as ESC-[-K in unbuffered
        mode. ignore incomplete MIME.
    */
    mode = c->mime_mode;
    c->mime_mode = exit_mode;  /* prepare for quit */

    while ((c1 = mime_getc0(f))<=' ') {
        if(c1==EOF)
            return (EOF);
    }
    if((c2 = mime_getc0(f))<=' ') {
        if(c2==EOF)
            return (EOF);
        if(c->mimebuf_f!=FIXED_MIME) c->input_mode = ASCII;
        return c2;
    }
    if((c1 == '?') && (c2 == '=')) {
        c->input_mode = ASCII;
        while((c1 =  sgetc(f))==' ' /* || c1=='\n' || c1=='\r' */);
        return c1;
    }
    if((c3 = mime_getc0(f))<=' ') {
        if(c3==EOF)
            return (EOF);
        if(c->mimebuf_f!=FIXED_MIME) c->input_mode = ASCII;
        return c3;
    }
    if((c4 = mime_getc0(f))<=' ') {
        if(c4==EOF)
            return (EOF);
        if(c->mimebuf_f!=FIXED_MIME) c->input_mode = ASCII;
        return c4;
    }

    c->mime_mode = mode; /* still in MIME sigh... */

    /* BASE 64 decoding */

    t1 = 0x3f & base64decode(c1);
    t2 = 0x3f & base64decode(c2);
    t3 = 0x3f & base64decode(c3);
    t4 = 0x3f & base64decode(c4);
    cc = ((t1 << 2) & 0x0fc) | ((t2 >> 4) & 0x03);
    if(c2 != '=') {
        Fifo(c->mime_last++) = cc;
        cc = ((t2 << 4) & 0x0f0) | ((t3 >> 2) & 0x0f);
        if(c3 != '=') {
            Fifo(c->mime_last++) = cc;
            cc = ((t3 << 6) & 0x0c0) | (t4 & 0x3f);
            if(c4 != '=')
                Fifo(c->mime_last++) = cc;
        }
    } else {
        return c1;
    }
    return  Fifo(c->mime_top++);
}

static int
mime_ungetc(struct timiditycontext_t *c, unsigned int ch)
{
    Fifo(c->mime_last++) = ch;
    return ch;
}

#ifdef STRICT_MIME
static int
mime_integrity(SFILE *f, unsigned char *p)
{
    int c,d;
    unsigned int q;
    /* In buffered mode, read until =? or NL or buffer full
     */
    c->mime_input = c->mime_top;
    c->mime_last = c->mime_top;
    while(*p) Fifo(c->mime_input++) = *p++;
    d = 0;
    q = c->mime_input;
    while((c=sgetc(f))!=EOF) {
        if(((c->mime_input-c->mime_top)&MIME_BUF_MASK)==0) break;
        if(c=='=' && d=='?') {
            /* checked. skip header, start decode */
            Fifo(c->mime_input++) = c;
            c->mime_input = q;
            return 1;
        }
        if(!( (c=='+'||c=='/'|| c=='=' || c=='?' ||
            ('a'<=c && c<='z')||('A'<= c && c<='Z')||('0'<=c && c<='9'))))
            break;
        /* Should we check length mod 4? */
        Fifo(c->mime_input++) = c;
        d=c;
    }
    /* In case of Incomplete MIME, no MIME decode  */
    Fifo(c->mime_input++) = c;
    c->mime_last = c->mime_input;     /* point undecoded buffer */
    c->mime_mode = 1;              /* no decode on Fifo last in mime_getc */
    return 1;
}
#endif

static int
base64decode(int c)
{
    int             i;
    if(c > '@')
        if(c < '[')
            i = c - 'A';                        /* A..Z 0-25 */
        else
            i = c - 'G'     /* - 'a' + 26 */ ;  /* a..z 26-51 */
    else if(c > '/')
        i = c - '0' + '4'   /* - '0' + 52 */ ;  /* 0..9 52-61 */
    else if(c == '+')
        i = '>'             /* 62 */ ;          /* +  62 */
    else
        i = '?'             /* 63 */ ;          /* / 63 */
    return (i);
}

static void
reinit(struct timiditycontext_t *c)
{
    c->unbuf_f = FALSE;
    c->estab_f = FALSE;
    c->nop_f = FALSE;
    c->binmode_f = TRUE;
    c->rot_f = FALSE;
    c->input_f = FALSE;
    c->alpha_f = FALSE;
    c->mime_f = TRUE;
    c->mimebuf_f = FALSE;
    c->broken_f = FALSE;
    c->iso8859_f = FALSE;
    c->x0201_f = TRUE;
    c->x0201_f = NO_X0201;
    c->fold_f  = FALSE;
    c->kanji_intro = DEFAULT_J;
    c->ascii_intro = DEFAULT_R;
    c->oconv = DEFAULT_CONV;
    c->output_mode = ASCII;
    c->input_mode =  ASCII;
    c->shift_mode =  FALSE;
    c->mime_mode =   FALSE;
    c->file_out = FALSE;
    c->add_cr = FALSE;
    c->del_cr = FALSE;
}

#if 0
#ifndef PERL_XS
int
usage()
{
    fprintf(stderr,"USAGE:  nkf(nkf32,wnkf,nkf2) -[flags] [in file] .. [out file for -O flag]\n");
    fprintf(stderr,"Flags:\n");
    fprintf(stderr,"b,u      Output is bufferred (DEFAULT),Output is unbufferred\n");
#ifdef DEFAULT_CODE_SJIS
    fprintf(stderr,"j,s,e    Outout code is JIS 7 bit, Shift JIS (DEFAULT), AT&T JIS (EUC)\n");
#endif
#ifdef DEFAULT_CODE_JIS
    fprintf(stderr,"j,s,e    Outout code is JIS 7 bit (DEFAULT), Shift JIS, AT&T JIS (EUC)\n");
#endif
#ifdef DEFAULT_CODE_EUC
    fprintf(stderr,"j,s,e    Outout code is JIS 7 bit, Shift JIS, AT&T JIS (EUC) (DEFAULT)\n");
#endif
    fprintf(stderr,"J,S,E    Input assumption is JIS 7 bit , Shift JIS, AT&T JIS (EUC)\n");
    fprintf(stderr,"t        no conversion\n");
    fprintf(stderr,"i_       Output sequence to designate JIS-kanji (DEFAULT B)\n");
    fprintf(stderr,"o_       Output sequence to designate ASCII (DEFAULT B)\n");
    fprintf(stderr,"r        {de/en}crypt ROT13/47\n");
    fprintf(stderr,"v        Show this usage\n");
    fprintf(stderr,"m[BQ0]   MIME decode [B:base64,Q:quoted,0:no decode]\n");
    fprintf(stderr,"l        ISO8859-1 (Latin-1) support\n");
    fprintf(stderr,"f        Folding: -f60 or -f\n");
    fprintf(stderr,"Z[0-2]   Convert X0208 alphabet to ASCII  1: Kankaku to space,2: 2 spaces\n");
    fprintf(stderr,"X,x      Assume X0201 kana in MS-Kanji, -x preserves X0201\n");
    fprintf(stderr,"B[0-2]   Broken input  0: missing ESC,1: any X on ESC-[($]-X,2: ASCII on NL\n");
#ifdef MSDOS
    fprintf(stderr,"T        Text mode output\n");
#endif
    fprintf(stderr,"O        Output to File (DEFAULT 'nkf.out')\n");
    fprintf(stderr,"d,c      Delete \\r in line feed, Add \\r in line feed\n");
    fprintf(stderr,"Network Kanji Filter Version %s (%s) "
#if defined(MSDOS) && !defined(_Windows)
                  "for DOS"
#endif
#if !defined(__WIN32__) && defined(_Windows)
                  "for Win16"
#endif
#if defined(__WIN32__) && defined(_Windows)
                  "for Win32"
#endif
#ifdef __OS2__
                  "for OS/2"
#endif
                  ,Version,Patchlevel);
    fprintf(stderr,"\n%s\n",CopyRight);
    return 0;
}
#endif
#endif

/**
 ** パッチ制作者
 **  void@merope.pleiades.or.jp (Kusakabe Youichi)
 **  NIDE Naoyuki <nide@ics.nara-wu.ac.jp>
 **  ohta@src.ricoh.co.jp (Junn Ohta)
 **  inouet@strl.nhk.or.jp (Tomoyuki Inoue)
 **  kiri@pulser.win.or.jp (Tetsuaki Kiriyama)
 **  Kimihiko Sato <sato@sail.t.u-tokyo.ac.jp>
 **  a_kuroe@kuroe.aoba.yokohama.jp (Akihiko Kuroe)
 **  kono@ie.u-ryukyu.ac.jp (Shinji Kono)
 **  GHG00637@nifty-serve.or.jp (COW)
 **
 ** 最終更新日
 **  1998.11.7
 **/

/* end */
#endif /* JAPANESE */

