342 lines
13 KiB
C#
342 lines
13 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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namespace UniJSON
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{
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public static class Utf8StringExtensions
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{
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public static void WriteTo(this Utf8String src, Stream dst)
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{
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dst.Write(src.Bytes.Array, src.Bytes.Offset, src.Bytes.Count);
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}
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public static Utf8Iterator GetFirst(this Utf8String src)
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{
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var it = src.GetIterator();
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it.MoveNext();
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return it;
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}
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public static bool TrySearchByte(this Utf8String src, Func<byte, bool> pred, out int pos)
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{
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pos = 0;
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for (; pos < src.ByteLength; ++pos)
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{
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if (pred(src[pos]))
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{
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return true;
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}
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}
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return false;
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}
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public static bool TrySearchAscii(this Utf8String src, Byte target, int start, out int pos)
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{
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var p = new Utf8Iterator(src.Bytes, start);
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while (p.MoveNext())
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{
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var b = p.Current;
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if (b <= 0x7F)
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{
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// ascii
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if (b == target/*'\"'*/)
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{
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// closed
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pos = p.BytePosition;
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return true;
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}
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else if (b == '\\')
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{
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// escaped
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switch ((char)p.Second)
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{
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case '"': // fall through
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case '\\': // fall through
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case '/': // fall through
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case 'b': // fall through
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case 'f': // fall through
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case 'n': // fall through
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case 'r': // fall through
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case 't': // fall through
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// skip next
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p.MoveNext();
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break;
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case 'u': // unicode
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// skip next 4
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p.MoveNext();
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p.MoveNext();
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p.MoveNext();
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p.MoveNext();
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break;
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default:
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// unknown escape
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throw new ParserException("unknown escape: " + p.Second);
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}
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}
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}
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}
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pos = -1;
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return false;
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}
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public static IEnumerable<Utf8String> Split(this Utf8String src, byte delimiter)
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{
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var start = 0;
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var p = new Utf8Iterator(src.Bytes);
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while (p.MoveNext())
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{
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if (p.Current == delimiter)
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{
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if (p.BytePosition - start == 0)
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{
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yield return default(Utf8String);
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}
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else
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{
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yield return src.Subbytes(start, p.BytePosition - start);
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}
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start = p.BytePosition + 1;
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}
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}
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if (start < p.BytePosition)
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{
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yield return src.Subbytes(start, p.BytePosition - start);
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}
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}
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#region atoi
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public static SByte ToSByte(this Utf8String src)
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{
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SByte value = 0;
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var p = new Utf8Iterator(src.Bytes);
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while (p.MoveNext())
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{
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var b = p.Current;
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switch (b)
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{
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case 0x30: value = (SByte)(value * 10); break;
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case 0x31: value = (SByte)(value * 10 + 1); break;
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case 0x32: value = (SByte)(value * 10 + 2); break;
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case 0x33: value = (SByte)(value * 10 + 3); break;
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case 0x34: value = (SByte)(value * 10 + 4); break;
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case 0x35: value = (SByte)(value * 10 + 5); break;
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case 0x36: value = (SByte)(value * 10 + 6); break;
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case 0x37: value = (SByte)(value * 10 + 7); break;
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case 0x38: value = (SByte)(value * 10 + 8); break;
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case 0x39: value = (SByte)(value * 10 + 9); break;
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default: throw new ArgumentOutOfRangeException();
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}
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}
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return value;
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}
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public static Int16 ToInt16(this Utf8String src)
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{
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Int16 value = 0;
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var p = new Utf8Iterator(src.Bytes);
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while (p.MoveNext())
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{
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var b = p.Current;
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switch (b)
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{
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case 0x30: value = (Int16)(value * 10); break;
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case 0x31: value = (Int16)(value * 10 + 1); break;
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case 0x32: value = (Int16)(value * 10 + 2); break;
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case 0x33: value = (Int16)(value * 10 + 3); break;
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case 0x34: value = (Int16)(value * 10 + 4); break;
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case 0x35: value = (Int16)(value * 10 + 5); break;
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case 0x36: value = (Int16)(value * 10 + 6); break;
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case 0x37: value = (Int16)(value * 10 + 7); break;
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case 0x38: value = (Int16)(value * 10 + 8); break;
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case 0x39: value = (Int16)(value * 10 + 9); break;
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default: throw new ArgumentOutOfRangeException();
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}
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}
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return value;
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}
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public static Int32 ToInt32(this Utf8String src)
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{
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Int32 value = 0;
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Int32 sign = 1;
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var p = new Utf8Iterator(src.Bytes);
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bool isFirst = true;
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while (p.MoveNext())
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{
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var b = p.Current;
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if (isFirst)
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{
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isFirst = false;
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if (b == '-')
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{
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sign = -1;
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continue;
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}
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}
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switch (b)
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{
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case 0x30: value = value * 10; break;
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case 0x31: value = value * 10 + 1; break;
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case 0x32: value = value * 10 + 2; break;
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case 0x33: value = value * 10 + 3; break;
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case 0x34: value = value * 10 + 4; break;
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case 0x35: value = value * 10 + 5; break;
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case 0x36: value = value * 10 + 6; break;
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case 0x37: value = value * 10 + 7; break;
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case 0x38: value = value * 10 + 8; break;
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case 0x39: value = value * 10 + 9; break;
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default: throw new ArgumentOutOfRangeException();
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}
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}
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return value * sign;
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}
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public static Int64 ToInt64(this Utf8String src)
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{
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Int64 value = 0;
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var p = new Utf8Iterator(src.Bytes);
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while (p.MoveNext())
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{
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var b = p.Current;
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switch (b)
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{
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case 0x30: value = (Int64)(value * 10); break;
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case 0x31: value = (Int64)(value * 10 + 1); break;
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case 0x32: value = (Int64)(value * 10 + 2); break;
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case 0x33: value = (Int64)(value * 10 + 3); break;
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case 0x34: value = (Int64)(value * 10 + 4); break;
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case 0x35: value = (Int64)(value * 10 + 5); break;
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case 0x36: value = (Int64)(value * 10 + 6); break;
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case 0x37: value = (Int64)(value * 10 + 7); break;
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case 0x38: value = (Int64)(value * 10 + 8); break;
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case 0x39: value = (Int64)(value * 10 + 9); break;
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default: throw new ArgumentOutOfRangeException();
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}
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}
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return value;
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}
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public static Byte ToByte(this Utf8String src)
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{
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Byte value = 0;
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var p = new Utf8Iterator(src.Bytes);
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while (p.MoveNext())
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{
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var b = p.Current;
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switch (b)
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{
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case 0x30: value = (Byte)(value * 10); break;
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case 0x31: value = (Byte)(value * 10 + 1); break;
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case 0x32: value = (Byte)(value * 10 + 2); break;
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case 0x33: value = (Byte)(value * 10 + 3); break;
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case 0x34: value = (Byte)(value * 10 + 4); break;
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case 0x35: value = (Byte)(value * 10 + 5); break;
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case 0x36: value = (Byte)(value * 10 + 6); break;
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case 0x37: value = (Byte)(value * 10 + 7); break;
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case 0x38: value = (Byte)(value * 10 + 8); break;
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case 0x39: value = (Byte)(value * 10 + 9); break;
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default: throw new ArgumentOutOfRangeException();
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}
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}
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return value;
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}
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public static UInt16 ToUInt16(this Utf8String src)
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{
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UInt16 value = 0;
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var p = new Utf8Iterator(src.Bytes);
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while (p.MoveNext())
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{
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var b = p.Current;
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switch (b)
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{
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case 0x30: value = (UInt16)(value * 10); break;
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case 0x31: value = (UInt16)(value * 10 + 1); break;
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case 0x32: value = (UInt16)(value * 10 + 2); break;
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case 0x33: value = (UInt16)(value * 10 + 3); break;
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case 0x34: value = (UInt16)(value * 10 + 4); break;
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case 0x35: value = (UInt16)(value * 10 + 5); break;
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case 0x36: value = (UInt16)(value * 10 + 6); break;
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case 0x37: value = (UInt16)(value * 10 + 7); break;
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case 0x38: value = (UInt16)(value * 10 + 8); break;
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case 0x39: value = (UInt16)(value * 10 + 9); break;
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default: throw new ArgumentOutOfRangeException();
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}
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}
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return value;
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}
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public static UInt32 ToUInt32(this Utf8String src)
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{
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UInt32 value = 0;
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var p = new Utf8Iterator(src.Bytes);
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while (p.MoveNext())
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{
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var b = p.Current;
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switch (b)
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{
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case 0x30: value = (UInt32)(value * 10); break;
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case 0x31: value = (UInt32)(value * 10 + 1); break;
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case 0x32: value = (UInt32)(value * 10 + 2); break;
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case 0x33: value = (UInt32)(value * 10 + 3); break;
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case 0x34: value = (UInt32)(value * 10 + 4); break;
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case 0x35: value = (UInt32)(value * 10 + 5); break;
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case 0x36: value = (UInt32)(value * 10 + 6); break;
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case 0x37: value = (UInt32)(value * 10 + 7); break;
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case 0x38: value = (UInt32)(value * 10 + 8); break;
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case 0x39: value = (UInt32)(value * 10 + 9); break;
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default: throw new ArgumentOutOfRangeException();
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}
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}
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return value;
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}
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public static UInt64 ToUInt64(this Utf8String src)
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{
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UInt64 value = 0;
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var p = new Utf8Iterator(src.Bytes);
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while (p.MoveNext())
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{
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var b = p.Current;
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switch (b)
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{
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case 0x30: value = (UInt64)(value * 10); break;
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case 0x31: value = (UInt64)(value * 10 + 1); break;
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case 0x32: value = (UInt64)(value * 10 + 2); break;
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case 0x33: value = (UInt64)(value * 10 + 3); break;
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case 0x34: value = (UInt64)(value * 10 + 4); break;
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case 0x35: value = (UInt64)(value * 10 + 5); break;
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case 0x36: value = (UInt64)(value * 10 + 6); break;
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case 0x37: value = (UInt64)(value * 10 + 7); break;
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case 0x38: value = (UInt64)(value * 10 + 8); break;
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case 0x39: value = (UInt64)(value * 10 + 9); break;
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default: throw new ArgumentOutOfRangeException();
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}
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}
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return value;
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}
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#endregion
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public static float ToSingle(this Utf8String src)
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{
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return Single.Parse(src.ToAscii(), System.Globalization.CultureInfo.InvariantCulture);
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}
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public static double ToDouble(this Utf8String src)
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{
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return Double.Parse(src.ToAscii(), System.Globalization.CultureInfo.InvariantCulture);
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}
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public static Utf8String GetLine(this Utf8String src)
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{
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int pos;
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if (!src.TrySearchAscii((byte)'\n', 0, out pos))
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{
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return src;
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}
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return src.Subbytes(0, pos + 1);
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}
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}
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}
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