/* Conversion of files between different charsets and surfaces.
   Copyright © 1993, 94, 96, 97, 98, 99, 00 Free Software Foundation, Inc.
   Contributed by François Pinard <pinard@iro.umontreal.ca>, 1993.

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

   This 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the `recode' 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.  */

/* Define for using a double step.  */
#define USE_RFC1345_STEP 1

#include "common.h"

/* RFC 1345 style description for AtariST (non official).

   NUSHSXEXETEQAKBLBSHTLFVTFFCRSOSIDLD1D2D3D4NKSYEBCNEMSBECFSGSRSUS
   SP! " NbDO% & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
   AtA B C D E F G H I J K L M N O P Q R S T U V W X Y Z <(//)>'>_
   '!a b c d e f g h i j k l m n o p q r s t u v w x y z (!!!!)'?DT
   C,u:e'a>a:a!aac,e>e:e!i:i>i!A:AAE'aeAEo>o:o!u>u!y:O:U:CtPdYessf2
   a'i'o'u'n?N?-a-o?ININO1214!I<<>>a?o?O/o/oeOEA!A?O?':''/-PICoRgTM
   ijIJA+B+G+D+H+W+Z+X+TjJ+K+L+M+N+S+E+P+ZJQ+R+ShT+N%K%M%P%ZjSECa00
   a*b*G*p*S*s*Myt*F*h*Omd*Iof*(-*P=3+->==<IuIl-:?2DGSb.MRTnS2S3S'm */

#if USE_RFC1345_STEP

/* Andreas Schwab writes:

   There are some characters which I'm not sure about.  When compared with
   IBM865 (which I think is the original source for the Atari charset) the
   characters "bullet operator" and "middle dot" (dec 249/250) are swapped.
   This may be intentional or a bug in the table for IBM865.  Also character
   dec 238 looks more like "element of" than "greek small letter epsilon",
   actually it is a bit too large for both interpretations.  I suppose that
   the other changes were made for copyright reasons.  */

/* Andreas later adds:

   This is a fix for the AtariST encoding table.  It was derived from the
   Omega unicode translation tables, which itself claims to be based on
   ftp://plan9.att.com/plan9/unixsrc/tcs.shar.Z.  Unfortunately i wasn't able
   to access this yet.  */

static const recode_ucs2 pool[256] =
  {
    /*   0 */ 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
    /*   8 */ 0x0008, 0x0009, 0x000A, 0x000B, 0x000C, 0x000D, 0x000E, 0x000F,
    /*  16 */ 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
    /*  24 */ 0x0018, 0x0019, 0x001A, 0x001B, 0x001C, 0x001D, 0x001E, 0x001F,
    /*  32 */ 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
    /*  40 */ 0x0028, 0x0029, 0x002A, 0x002B, 0x002C, 0x002D, 0x002E, 0x002F,
    /*  48 */ 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
    /*  56 */ 0x0038, 0x0039, 0x003A, 0x003B, 0x003C, 0x003D, 0x003E, 0x003F,
    /*  64 */ 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
    /*  72 */ 0x0048, 0x0049, 0x004A, 0x004B, 0x004C, 0x004D, 0x004E, 0x004F,
    /*  80 */ 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
    /*  88 */ 0x0058, 0x0059, 0x005A, 0x005B, 0x005C, 0x005D, 0x005E, 0x005F,
    /*  96 */ 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
    /* 104 */ 0x0068, 0x0069, 0x006A, 0x006B, 0x006C, 0x006D, 0x006E, 0x006F,
    /* 112 */ 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
    /* 120 */ 0x0078, 0x0079, 0x007A, 0x007B, 0x007C, 0x007D, 0x007E, 0x007F,
    /* 128 */ 0x00C7, 0x00FC, 0x00E9, 0x00E2, 0x00E4, 0x00E0, 0x00E5, 0x00E7,
    /* 136 */ 0x00EA, 0x00EB, 0x00E8, 0x00EF, 0x00EE, 0x00EC, 0x00C4, 0x00C5,
    /* 144 */ 0x00C9, 0x00E6, 0x00C6, 0x00F4, 0x00F6, 0x00F2, 0x00FB, 0x00F9,
    /* 152 */ 0x00FF, 0x00D6, 0x00DC, 0x00A2, 0x00A3, 0x00A5, 0x00DF, 0x0192,
    /* 160 */ 0x00E1, 0x00ED, 0x00F3, 0x00FA, 0x00F1, 0x00D1, 0x00AA, 0x00BA,
    /* 168 */ 0x00BF, 0x2310, 0x00AC, 0x00BD, 0x00BC, 0x00A1, 0x00AB, 0x00BB,
    /* 176 */ 0x00E3, 0x00F5, 0x00D8, 0x00F8, 0x0153, 0x0152, 0x00C0, 0x00C3,
    /* 184 */ 0x00D5, 0x00A8, 0x00B4, 0x2020, 0x00B6, 0x00A9, 0x00AE, 0x2122,
    /* 192 */ 0x0133, 0x0132, 0x05D0, 0x05D1, 0x05D2, 0x05D3, 0x05D4, 0x05D5,
    /* 200 */ 0x05D6, 0x05D7, 0x05D8, 0x05D9, 0x05DB, 0x05DC, 0x05DE, 0x05E0,
    /* 208 */ 0x05E1, 0x05E2, 0x05E4, 0x05E6, 0x05E7, 0x05E8, 0x05E9, 0x05EA,
    /* 216 */ 0x05DF, 0x05DA, 0x05DD, 0x05E3, 0x05E5, 0x00A7, 0x2038, 0x221E,
    /* 224 */ 0x03B1, 0x03B2, 0x0393, 0x03C0, 0x03A3, 0x03C3, 0x00B5, 0x03C4,
    /* 232 */ 0x03A6, 0x03B8, 0x2126, 0x03B4, 0x222E, 0x03C6, 0x2208, 0x220F,
    /* 240 */ 0x2261, 0x00B1, 0x2265, 0x2264, 0x2320, 0x2321, 0x00F7, 0x2248,
    /* 248 */ 0x00B0, 0x2022, 0x00B7, 0x221A, 0x207F, 0x00B2, 0x00B3, 0x00AF
  };

static struct strip_data table =
  {
    pool,
    {
      0,    8,   16,   24,   32,   40,   48,   56,   64,   72,   80,   88,
      96,  104,  112,  120,  128,  136,  144,  152,  160,  168,  176,  184,
      192, 200,  208,  216,  224,  232,  240,  248
    }
};

#else /* not USE_RFC1345_STEP */

/* Data for Atari ST to ISO Latin-1 code conversions.  */

static struct recode_known_pair known_pairs[] =
  {
    {128, 199},			/* C, */
    {129, 252},			/* u" */
    {130, 233},			/* e' */
    {131, 226},			/* a^ */
    {132, 228},			/* a" */
    {133, 224},			/* a` */
    {134, 229},			/* aa */
    {135, 231},			/* c, */
    {136, 234},			/* e^ */
    {137, 235},			/* e" */
    {138, 232},			/* e` */
    {139, 239},			/* i" */
    {140, 238},			/* i^ */
    {141, 236},			/* i` */
    {142, 196},			/* A" */
    {143, 197},			/* AA */
    {144, 201},			/* E' */
    {145, 230},			/* ae */
    {146, 198},			/* AE */
    {147, 244},			/* o^ */
    {148, 246},			/* o" */
    {149, 242},			/* o` */
    {150, 251},			/* u^ */
    {151, 249},			/* u` */
    {152, 255},			/* y" */
    {153, 214},			/* O" */
    {154, 220},			/* U" */
    {155, 162},			/* \cent */
    {156, 163},			/* \pound */
    {157, 165},			/* \yen */
    {158, 223},			/* \ss */

    {160, 225},			/* a' */
    {161, 237},			/* i' */
    {162, 243},			/* o' */
    {163, 250},			/* u' */
    {164, 241},			/* n~ */
    {165, 209},			/* N~ */
    {166, 170},			/* a_ */
    {167, 186},			/* o_ */
    {168, 191},			/* ?' */

    {170, 172},			/* \neg */
    {171, 189},			/* 1/2 */
    {172, 188},			/* 1/4 */
    {173, 161},			/* !` */
    {174, 171},			/* `` */
    {175, 187},			/* '' */
    {176, 227},			/* a~ */
    {177, 245},			/* o~ */
    {178, 216},			/* O/ */
    {179, 248},			/* o/ */

    {182, 192},			/* A` */
    {183, 195},			/* A~ */
    {184, 213},			/* O~ */
    {185, 168},			/* diaeresis */
    {186, 180},			/* acute accent */

    {188, 182},			/* pilcrow sign */
    {189, 169},			/* copyright sign */
    {190, 174},			/* registered trade mark sign */

    {221, 167},			/* paragraph sign, section sign */

    {230, 181},			/* mu, micro */

    {241, 177},			/* +- */

    {246, 247},			/* \div */

    {248, 176},			/* \deg */

    {250, 183},			/* \cdot */

    {253, 178},			/* ^2 */
    {254, 179},			/* ^3 */
    {255, 175},			/* macron */
  };
#define NUMBER_OF_PAIRS (sizeof (known_pairs) / sizeof (struct recode_known_pair))

static bool
init_latin1_atarist (RECODE_STEP step,
		     RECODE_CONST_REQUEST request)
{
  return
    complete_pairs (request->outer, step,
		    known_pairs, NUMBER_OF_PAIRS, true, true);
}

static void
init_atarist_latin1 (RECODE_STEP step,
		     RECODE_CONST_REQUEST request)
{
  return
    complete_pairs (request->outer, step,
		    known_pairs, NUMBER_OF_PAIRS, true, false);
}

#endif /* not USE_RFC1345_STEP */

/* Have this routine only once, for {dec,ini}steps.h to be proper.  */

bool
module_atarist (RECODE_OUTER outer)
{
#if USE_RFC1345_STEP

  return declare_strip_data (outer, &table, "AtariST");

#else

  return
    declare_single (outer, "Latin-1", "AtariST",
		    outer->quality_byte_to_variable,
		    init_latin1_atarist, NULL)
    && declare_single (outer, "AtariST", "Latin-1",
		       outer->quality_byte_to_variable,
		       init_atarist_latin1, NULL);

#endif
}

void
delmodule_atarist (RECODE_OUTER outer)
{
}