Utf8StringExtensions.cs
13.1 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
using System;
using System.Collections.Generic;
using System.IO;
namespace UniJSON
{
public static class Utf8StringExtensions
{
public static void WriteTo(this Utf8String src, Stream dst)
{
dst.Write(src.Bytes.Array, src.Bytes.Offset, src.Bytes.Count);
}
public static Utf8Iterator GetFirst(this Utf8String src)
{
var it = src.GetIterator();
it.MoveNext();
return it;
}
public static bool TrySearchByte(this Utf8String src, Func<byte, bool> pred, out int pos)
{
pos = 0;
for (; pos < src.ByteLength; ++pos)
{
if (pred(src[pos]))
{
return true;
}
}
return false;
}
public static bool TrySearchAscii(this Utf8String src, Byte target, int start, out int pos)
{
var p = new Utf8Iterator(src.Bytes, start);
while (p.MoveNext())
{
var b = p.Current;
if (b <= 0x7F)
{
// ascii
if (b == target/*'\"'*/)
{
// closed
pos = p.BytePosition;
return true;
}
else if (b == '\\')
{
// escaped
switch ((char)p.Second)
{
case '"': // fall through
case '\\': // fall through
case '/': // fall through
case 'b': // fall through
case 'f': // fall through
case 'n': // fall through
case 'r': // fall through
case 't': // fall through
// skip next
p.MoveNext();
break;
case 'u': // unicode
// skip next 4
p.MoveNext();
p.MoveNext();
p.MoveNext();
p.MoveNext();
break;
default:
// unkonw escape
throw new ParserException("unknown escape: " + p.Second);
}
}
}
}
pos = -1;
return false;
}
public static IEnumerable<Utf8String> Split(this Utf8String src, byte delemeter)
{
var start = 0;
var p = new Utf8Iterator(src.Bytes);
while (p.MoveNext())
{
if (p.Current == delemeter)
{
if (p.BytePosition - start == 0)
{
yield return default(Utf8String);
}
else
{
yield return src.Subbytes(start, p.BytePosition - start);
}
start = p.BytePosition + 1;
}
}
if (start < p.BytePosition)
{
yield return src.Subbytes(start, p.BytePosition - start);
}
}
#region atoi
public static SByte ToSByte(this Utf8String src)
{
SByte value = 0;
var p = new Utf8Iterator(src.Bytes);
while (p.MoveNext())
{
var b = p.Current;
switch (b)
{
case 0x30: value = (SByte)(value * 10); break;
case 0x31: value = (SByte)(value * 10 + 1); break;
case 0x32: value = (SByte)(value * 10 + 2); break;
case 0x33: value = (SByte)(value * 10 + 3); break;
case 0x34: value = (SByte)(value * 10 + 4); break;
case 0x35: value = (SByte)(value * 10 + 5); break;
case 0x36: value = (SByte)(value * 10 + 6); break;
case 0x37: value = (SByte)(value * 10 + 7); break;
case 0x38: value = (SByte)(value * 10 + 8); break;
case 0x39: value = (SByte)(value * 10 + 9); break;
default: throw new ArgumentOutOfRangeException();
}
}
return value;
}
public static Int16 ToInt16(this Utf8String src)
{
Int16 value = 0;
var p = new Utf8Iterator(src.Bytes);
while (p.MoveNext())
{
var b = p.Current;
switch (b)
{
case 0x30: value = (Int16)(value * 10); break;
case 0x31: value = (Int16)(value * 10 + 1); break;
case 0x32: value = (Int16)(value * 10 + 2); break;
case 0x33: value = (Int16)(value * 10 + 3); break;
case 0x34: value = (Int16)(value * 10 + 4); break;
case 0x35: value = (Int16)(value * 10 + 5); break;
case 0x36: value = (Int16)(value * 10 + 6); break;
case 0x37: value = (Int16)(value * 10 + 7); break;
case 0x38: value = (Int16)(value * 10 + 8); break;
case 0x39: value = (Int16)(value * 10 + 9); break;
default: throw new ArgumentOutOfRangeException();
}
}
return value;
}
public static Int32 ToInt32(this Utf8String src)
{
Int32 value = 0;
Int32 sign = 1;
var p = new Utf8Iterator(src.Bytes);
bool isFirst = true;
while (p.MoveNext())
{
var b = p.Current;
if (isFirst)
{
isFirst = false;
if (b == '-')
{
sign = -1;
continue;
}
}
switch (b)
{
case 0x30: value = value * 10; break;
case 0x31: value = value * 10 + 1; break;
case 0x32: value = value * 10 + 2; break;
case 0x33: value = value * 10 + 3; break;
case 0x34: value = value * 10 + 4; break;
case 0x35: value = value * 10 + 5; break;
case 0x36: value = value * 10 + 6; break;
case 0x37: value = value * 10 + 7; break;
case 0x38: value = value * 10 + 8; break;
case 0x39: value = value * 10 + 9; break;
default: throw new ArgumentOutOfRangeException();
}
}
return value * sign;
}
public static Int64 ToInt64(this Utf8String src)
{
Int64 value = 0;
var p = new Utf8Iterator(src.Bytes);
while (p.MoveNext())
{
var b = p.Current;
switch (b)
{
case 0x30: value = (Int64)(value * 10); break;
case 0x31: value = (Int64)(value * 10 + 1); break;
case 0x32: value = (Int64)(value * 10 + 2); break;
case 0x33: value = (Int64)(value * 10 + 3); break;
case 0x34: value = (Int64)(value * 10 + 4); break;
case 0x35: value = (Int64)(value * 10 + 5); break;
case 0x36: value = (Int64)(value * 10 + 6); break;
case 0x37: value = (Int64)(value * 10 + 7); break;
case 0x38: value = (Int64)(value * 10 + 8); break;
case 0x39: value = (Int64)(value * 10 + 9); break;
default: throw new ArgumentOutOfRangeException();
}
}
return value;
}
public static Byte ToByte(this Utf8String src)
{
Byte value = 0;
var p = new Utf8Iterator(src.Bytes);
while (p.MoveNext())
{
var b = p.Current;
switch (b)
{
case 0x30: value = (Byte)(value * 10); break;
case 0x31: value = (Byte)(value * 10 + 1); break;
case 0x32: value = (Byte)(value * 10 + 2); break;
case 0x33: value = (Byte)(value * 10 + 3); break;
case 0x34: value = (Byte)(value * 10 + 4); break;
case 0x35: value = (Byte)(value * 10 + 5); break;
case 0x36: value = (Byte)(value * 10 + 6); break;
case 0x37: value = (Byte)(value * 10 + 7); break;
case 0x38: value = (Byte)(value * 10 + 8); break;
case 0x39: value = (Byte)(value * 10 + 9); break;
default: throw new ArgumentOutOfRangeException();
}
}
return value;
}
public static UInt16 ToUInt16(this Utf8String src)
{
UInt16 value = 0;
var p = new Utf8Iterator(src.Bytes);
while (p.MoveNext())
{
var b = p.Current;
switch (b)
{
case 0x30: value = (UInt16)(value * 10); break;
case 0x31: value = (UInt16)(value * 10 + 1); break;
case 0x32: value = (UInt16)(value * 10 + 2); break;
case 0x33: value = (UInt16)(value * 10 + 3); break;
case 0x34: value = (UInt16)(value * 10 + 4); break;
case 0x35: value = (UInt16)(value * 10 + 5); break;
case 0x36: value = (UInt16)(value * 10 + 6); break;
case 0x37: value = (UInt16)(value * 10 + 7); break;
case 0x38: value = (UInt16)(value * 10 + 8); break;
case 0x39: value = (UInt16)(value * 10 + 9); break;
default: throw new ArgumentOutOfRangeException();
}
}
return value;
}
public static UInt32 ToUInt32(this Utf8String src)
{
UInt32 value = 0;
var p = new Utf8Iterator(src.Bytes);
while (p.MoveNext())
{
var b = p.Current;
switch (b)
{
case 0x30: value = (UInt32)(value * 10); break;
case 0x31: value = (UInt32)(value * 10 + 1); break;
case 0x32: value = (UInt32)(value * 10 + 2); break;
case 0x33: value = (UInt32)(value * 10 + 3); break;
case 0x34: value = (UInt32)(value * 10 + 4); break;
case 0x35: value = (UInt32)(value * 10 + 5); break;
case 0x36: value = (UInt32)(value * 10 + 6); break;
case 0x37: value = (UInt32)(value * 10 + 7); break;
case 0x38: value = (UInt32)(value * 10 + 8); break;
case 0x39: value = (UInt32)(value * 10 + 9); break;
default: throw new ArgumentOutOfRangeException();
}
}
return value;
}
public static UInt64 ToUInt64(this Utf8String src)
{
UInt64 value = 0;
var p = new Utf8Iterator(src.Bytes);
while (p.MoveNext())
{
var b = p.Current;
switch (b)
{
case 0x30: value = (UInt64)(value * 10); break;
case 0x31: value = (UInt64)(value * 10 + 1); break;
case 0x32: value = (UInt64)(value * 10 + 2); break;
case 0x33: value = (UInt64)(value * 10 + 3); break;
case 0x34: value = (UInt64)(value * 10 + 4); break;
case 0x35: value = (UInt64)(value * 10 + 5); break;
case 0x36: value = (UInt64)(value * 10 + 6); break;
case 0x37: value = (UInt64)(value * 10 + 7); break;
case 0x38: value = (UInt64)(value * 10 + 8); break;
case 0x39: value = (UInt64)(value * 10 + 9); break;
default: throw new ArgumentOutOfRangeException();
}
}
return value;
}
#endregion
public static float ToSingle(this Utf8String src)
{
return Single.Parse(src.ToAscii(), System.Globalization.CultureInfo.InvariantCulture);
}
public static double ToDouble(this Utf8String src)
{
return Double.Parse(src.ToAscii(), System.Globalization.CultureInfo.InvariantCulture);
}
public static Utf8String GetLine(this Utf8String src)
{
int pos;
if (!src.TrySearchAscii((byte)'\n', 0, out pos))
{
return src;
}
return src.Subbytes(0, pos + 1);
}
}
}