/// <summary>UTF8文字を作成する。</summary>
/// <param name="buf">バイトバッファ。</param>
/// <param name="i">変換開始位置。</param>
/// <param name="skip">変換バイト数。</param>
/// <returns>UTF8文字。</returns>
internal static UTF8 Build(byte[] buf, int i, int skip)
{
var res = new UTF8();
switch (skip)
{
case 1:
res.ch1 = buf[i];
break;
case 2:
res.ch1 = buf[i];
res.ch2 = buf[i + 1];
break;
case 3:
res.ch1 = buf[i];
res.ch2 = buf[i + 1];
res.ch3 = buf[i + 2];
break;
case 4:
res.ch1 = buf[i];
res.ch2 = buf[i + 1];
res.ch3 = buf[i + 2];
res.ch4 = buf[i + 3];
break;
case 5:
res.ch1 = buf[i];
res.ch2 = buf[i + 1];
res.ch3 = buf[i + 2];
res.ch4 = buf[i + 3];
res.ch5 = buf[i + 4];
break;
default:
res.ch1 = buf[i];
res.ch2 = buf[i + 1];
res.ch3 = buf[i + 2];
res.ch4 = buf[i + 3];
res.ch5 = buf[i + 4];
res.ch6 = buf[i + 5];
break;
}
return(res);
}
/// <summary>UNICODEエスケープ判定。</summary>
/// <param name="iter">イテレータ。</param>
/// <param name="len">読み込む文字数。</param>
/// <param name="buf">バイトリスト。</param>
private static void AppendUnicode(TomlInnerBuffer.TomlIter iter, int len, List <byte> buf)
{
// 16進数文字を判定し、数値化
uint val = 0;
for (int i = 0; i < len; ++i)
{
UTF8 c = iter.GetChar(i);
val <<= 4;
if (c.ch1 >= '0' && c.ch1 <= '9')
{
val |= (uint)(c.ch1 - '0');
}
else if (c.ch1 >= 'a' && c.ch1 <= 'f')
{
val |= (uint)(10 + c.ch1 - 'a');
}
else if (c.ch1 >= 'A' && c.ch1 <= 'F')
{
val |= (uint)(10 + c.ch1 - 'A');
}
else
{
throw new TomlAnalisysException(Resources.UNICODE_DEFINE_ERR, iter);
}
}
// UTF8へ変換
if (val < 0x80)
{
buf.Add((byte)(val & 0xff));
}
else if (val < 0x800)
{
buf.Add((byte)(0xc0 | (val >> 6)));
buf.Add((byte)(0x80 | (val & 0x3f)));
}
else if (val < 0x10000)
{
buf.Add((byte)(0xe0 | (val >> 12)));
buf.Add((byte)(0x80 | ((val >> 6) & 0x3f)));
buf.Add((byte)(0x80 | (val & 0x3f)));
}
else if (val < 0x200000)
{
buf.Add((byte)(0xf0 | (val >> 18)));
buf.Add((byte)(0x80 | ((val >> 12) & 0x3f)));
buf.Add((byte)(0x80 | ((val >> 6) & 0x3f)));
buf.Add((byte)(0x80 | (val & 0x3f)));
}
else if (val < 0x4000000)
{
buf.Add((byte)(0xf8 | (val >> 24)));
buf.Add((byte)(0x80 | ((val >> 18) & 0x3f)));
buf.Add((byte)(0x80 | ((val >> 12) & 0x3f)));
buf.Add((byte)(0x80 | ((val >> 6) & 0x3f)));
buf.Add((byte)(0x80 | (val & 0x3f)));
}
else
{
buf.Add((byte)(0xfc | (val >> 30)));
buf.Add((byte)(0x80 | ((val >> 24) & 0x3f)));
buf.Add((byte)(0x80 | ((val >> 18) & 0x3f)));
buf.Add((byte)(0x80 | ((val >> 12) & 0x3f)));
buf.Add((byte)(0x80 | ((val >> 6) & 0x3f)));
buf.Add((byte)(0x80 | (val & 0x3f)));
}
iter.Skip(len);
}
/// <summary>'\'エスケープ文字を取得する。</summary>
/// <param name="iter">イテレータ。</param>
/// <param name="buf">バイトリスト。</param>
private static void AppendEscapeChar(TomlInnerBuffer.TomlIter iter, List <byte> buf)
{
if (iter.RemnantLength > 2)
{
UTF8 c = iter.GetChar(1);
switch (c.ch1)
{
case (byte)'b':
buf.Add((byte)'\b');
iter.Skip(2);
break;
case (byte)'t':
buf.Add((byte)'\t');
iter.Skip(2);
break;
case (byte)'n':
buf.Add((byte)'\n');
iter.Skip(2);
break;
case (byte)'f':
buf.Add((byte)'\f');
iter.Skip(2);
break;
case (byte)'r':
buf.Add((byte)'\r');
iter.Skip(2);
break;
case (byte)'"':
buf.Add((byte)'"');
iter.Skip(2);
break;
case (byte)'/':
buf.Add((byte)'/');
iter.Skip(2);
break;
case (byte)'\\':
buf.Add((byte)'\\');
iter.Skip(2);
break;
case (byte)'u':
if (iter.RemnantLength >= 6)
{
iter.Skip(2);
AppendUnicode(iter, 4, buf);
}
break;
case (byte)'U':
if (iter.RemnantLength >= 10)
{
iter.Skip(2);
AppendUnicode(iter, 8, buf);
}
break;
default:
throw new TomlAnalisysException(Resources.INVALID_ESCAPE_CHAR_ERR, iter);
}
}
}
/// <summary>改行まで文字を取り込む。</summary>
/// <param name="sr">読み込みストリーム。</param>
public bool ReadLine(Stream sr)
{
var res = false;
while (true)
{
// バッファに文字を取り込む
int maxLen = 0;
if (this.readed > 0)
{
maxLen = this.readed;
this.readed = 0;
}
else
{
maxLen = sr.Read(this.restBuffer, 0, this.restBuffer.Length);
}
int skip = 0;
if (maxLen > 0)
{
res = true;
for (int i = 0; i < maxLen && this.restBuffer[i] != 0; i += skip)
{
// 文字のバイト数を取得
skip = GetSkipByte(this.restBuffer[i]);
// UTF8の文字をバッファに書き込む
//
// 1. 文字数分取り込んでいるためバッファに書き込む
// 1-1. 改行ならば取り込み中止
// 2. 文字数取り込めていないため、次を取り込む
if (i + skip <= maxLen)
{
var ch = UTF8.Build(this.restBuffer, i, skip); // 1
this.characters.Add(ch);
if (ch.ch1 == '\n') // 1-1
{
Buffer.BlockCopy(this.restBuffer, i + 1,
this.restBuffer, 0,
this.restBuffer.Length - (i + 1));
this.readed = maxLen - (i + 1);
this.xPosition = this.characters.Count;
this.yPosition++;
goto LOOP_END;
}
}
else
{
var rest = maxLen - i; // 2
Buffer.BlockCopy(this.restBuffer, i, this.restBuffer, 0, rest);
this.readed = rest + sr.Read(this.restBuffer, rest, this.restBuffer.Length - rest);
}
}
}
else
{
break;
}
}
LOOP_END:
this.IsEndStream = !res;
return(res);
}