PKHeX/PKHeX.Core/PKM/Strings/StringConverter3.cs

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using System;
namespace PKHeX.Core;
/// <summary>
/// Logic for converting a <see cref="string"/> for Generation 3.
/// </summary>
public static class StringConverter3
{
private const byte TerminatorByte = 0xFF;
private const char Terminator = (char)TerminatorByte;
/// <summary>
/// Converts a Generation 3 encoded value array to string.
/// </summary>
/// <param name="data">Byte array containing string data.</param>
/// <param name="jp">Value source is Japanese font.</param>
/// <returns>Decoded string.</returns>
public static string GetString(ReadOnlySpan<byte> data, bool jp)
{
Span<char> result = stackalloc char[data.Length];
int i = 0;
for (; i < data.Length; i++)
{
var value = data[i];
var c = GetG3Char(value, jp); // Convert to Unicode
if (c == Terminator) // Stop if Terminator/Invalid
break;
result[i] = c;
}
return new string(result[..i].ToArray());
}
/// <summary>
/// Converts a string to a Generation 3 encoded value array.
/// </summary>
/// <param name="buffer"></param>
/// <param name="value">Decoded string.</param>
/// <param name="maxLength">Maximum length of the input <see cref="value"/></param>
/// <param name="jp">String destination is Japanese font.</param>
2022-01-08 17:54:32 +00:00
/// <param name="option">Buffer pre-formatting option</param>
/// <returns>Encoded data.</returns>
public static int SetString(Span<byte> buffer, ReadOnlySpan<char> value, int maxLength, bool jp,
StringConverterOption option = StringConverterOption.ClearFF)
{
if (value.Length > maxLength)
value = value[..maxLength]; // Hard cap
if (option is StringConverterOption.ClearFF)
buffer.Fill(0xFF);
else if (option is StringConverterOption.ClearZero)
buffer.Clear();
int i = 0;
for (; i < value.Length; i++)
{
var chr = value[i];
var b = SetG3Char(chr, jp);
if (b == TerminatorByte)
break;
buffer[i] = b;
}
int count = i;
if (count < buffer.Length)
buffer[count++] = TerminatorByte;
return count;
}
/// <summary>
/// Decodes a character from a Generation 3 encoded value.
/// </summary>
/// <param name="chr">Generation 4 decoded character.</param>
/// <param name="jp">Character destination is Japanese font.</param>
/// <returns>Generation 3 encoded value.</returns>
private static char GetG3Char(byte chr, bool jp)
{
var table = jp ? G3_JP : G3_EN;
return table[chr];
}
/// <summary>
/// Encodes a character to a Generation 3 encoded value.
/// </summary>
/// <param name="chr">Generation 4 decoded character.</param>
/// <param name="jp">Character destination is Japanese font.</param>
/// <returns>Generation 3 encoded value.</returns>
private static byte SetG3Char(char chr, bool jp)
{
if (chr == '\'') //
return 0xB4;
var table = jp ? G3_JP : G3_EN;
var index = Array.IndexOf(table, chr);
if (index == -1)
return TerminatorByte;
return (byte)index;
}
private static readonly char[] G3_EN =
{
' ', 'À', 'Á', 'Â', 'Ç', 'È', 'É', 'Ê', 'Ë', 'Ì', 'こ', 'Î', 'Ï', 'Ò', 'Ó', 'Ô', // 0
'Œ', 'Ù', 'Ú', 'Û', 'Ñ', 'ß', 'à', 'á', 'ね', 'Ç', 'È', 'é', 'ê', 'ë', 'ì', 'í', // 1
'î', 'ï', 'ò', 'ó', 'ô', 'œ', 'ù', 'ú', 'û', 'ñ', 'º', 'ª', '⒅', '&', '+', 'あ', // 2
'ぃ', 'ぅ', 'ぇ', 'ぉ', 'ゃ', '=', 'ょ', 'が', 'ぎ', 'ぐ', 'げ', 'ご', 'ざ', 'じ', 'ず', 'ぜ', // 3
'ぞ', 'だ', 'ぢ', 'づ', 'で', 'ど', 'ば', 'び', 'ぶ', 'べ', 'ぼ', 'ぱ', 'ぴ', 'ぷ', 'ぺ', 'ぽ', // 4
'っ', '¿', '¡', '⒆', '⒇', 'オ', 'カ', 'キ', 'ク', 'ケ', 'Í', 'コ', 'サ', 'ス', 'セ', 'ソ', // 5
'タ', 'チ', 'ツ', 'テ', 'ト', 'ナ', 'ニ', 'ヌ', 'â', '', 'ハ', 'ヒ', 'フ', 'ヘ', 'ホ', 'í', // 6
'ミ', 'ム', 'メ', 'モ', 'ヤ', 'ユ', 'ヨ', 'ラ', 'リ', 'ル', 'レ', 'ロ', 'ワ', 'ヲ', 'ン', 'ァ', // 7
'ィ', 'ゥ', 'ェ', 'ォ', 'ャ', 'ュ', 'ョ', 'ガ', 'ギ', 'グ', 'ゲ', 'ゴ', 'ザ', 'ジ', 'ズ', 'ゼ', // 8
'ゾ', 'ダ', 'ヂ', 'ヅ', 'デ', 'ド', 'バ', 'ビ', 'ブ', 'ベ', 'ボ', 'パ', 'ピ', 'プ', 'ペ', 'ポ', // 9
'ッ', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '!', '?', '.', '-', '・',// A
'⑬', '“', '”', '', '', '♂', '♀', '$', ',', '⑧', '/', 'A', 'B', 'C', 'D', 'E', // B
'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', // C
'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', // D
'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', // E
':', 'Ä', 'Ö', 'Ü', 'ä', 'ö', 'ü', // F
// Make the total length 256 so that any byte access is always within the array
Terminator, Terminator, Terminator, Terminator, Terminator, Terminator, Terminator, Terminator, Terminator,
};
private static readonly char[] G3_JP =
{
' ', 'あ', 'い', 'う', 'え', 'お', 'か', 'き', 'く', 'け', 'こ', 'さ', 'し', 'す', 'せ', 'そ', // 0
'た', 'ち', 'つ', 'て', 'と', 'な', 'に', 'ぬ', 'ね', 'の', 'は', 'ひ', 'ふ', 'へ', 'ほ', 'ま', // 1
'み', 'む', 'め', 'も', 'や', 'ゆ', 'よ', 'ら', 'り', 'る', 'れ', 'ろ', 'わ', 'を', 'ん', 'ぁ', // 2
'ぃ', 'ぅ', 'ぇ', 'ぉ', 'ゃ', 'ゅ', 'ょ', 'が', 'ぎ', 'ぐ', 'げ', 'ご', 'ざ', 'じ', 'ず', 'ぜ', // 3
'ぞ', 'だ', 'ぢ', 'づ', 'で', 'ど', 'ば', 'び', 'ぶ', 'べ', 'ぼ', 'ぱ', 'ぴ', 'ぷ', 'ぺ', 'ぽ', // 4
'っ', 'ア', 'イ', 'ウ', 'エ', 'オ', 'カ', 'キ', 'ク', 'ケ', 'コ', 'サ', 'シ', 'ス', 'セ', 'ソ', // 5
'タ', 'チ', 'ツ', 'テ', 'ト', 'ナ', 'ニ', 'ヌ', 'ネ', '', 'ハ', 'ヒ', 'フ', 'ヘ', 'ホ', 'マ', // 6
'ミ', 'ム', 'メ', 'モ', 'ヤ', 'ユ', 'ヨ', 'ラ', 'リ', 'ル', 'レ', 'ロ', 'ワ', 'ヲ', 'ン', 'ァ', // 7
'ィ', 'ゥ', 'ェ', 'ォ', 'ャ', 'ュ', 'ョ', 'ガ', 'ギ', 'グ', 'ゲ', 'ゴ', 'ザ', 'ジ', 'ズ', 'ゼ', // 8
'ゾ', 'ダ', 'ヂ', 'ヅ', 'デ', 'ド', 'バ', 'ビ', 'ブ', 'ベ', 'ボ', 'パ', 'ピ', 'プ', 'ペ', 'ポ', // 9
'ッ', '', '', '', '', '', '', '', '', '', '', '', '', '。', 'ー', '・', // A
'⋯', '『', '』', '「', '」', '♂', '♀', '$', '.', '⑧', '/', '', '', '', '', '', // B
'', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', // C
'', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', // D
'', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '0', // E
':', 'Ä', 'Ö', 'Ü', 'ä', 'ö', 'ü', // F
// Make the total length 256 so that any byte access is always within the array
Terminator, Terminator, Terminator, Terminator, Terminator, Terminator, Terminator, Terminator, Terminator,
};
}