-
Notifications
You must be signed in to change notification settings - Fork 0
/
HexUtils.cs
348 lines (306 loc) · 16.4 KB
/
HexUtils.cs
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
342
343
344
345
346
347
348
using System;
using System.IO;
using System.Text;
namespace VanityAddrGen
{
/// <summary>
/// Behold the almighty HexUtils with several ridiculous optimization tricks.
/// </summary>
public static class HexUtils
{
private static readonly char[] hexMap8 =
{
'0', '1', '2', '3', '4',
'5', '6', '7', '8', '9',
'A', 'B', 'C', 'D', 'E', 'F',
};
private static readonly string[] hexMap16 =
{
"00", "01", "02", "03", "04", "05", "06", "07",
"08", "09", "0A", "0B", "0C", "0D", "0E", "0F",
"10", "11", "12", "13", "14", "15", "16", "17",
"18", "19", "1A", "1B", "1C", "1D", "1E", "1F",
"20", "21", "22", "23", "24", "25", "26", "27",
"28", "29", "2A", "2B", "2C", "2D", "2E", "2F",
"30", "31", "32", "33", "34", "35", "36", "37",
"38", "39", "3A", "3B", "3C", "3D", "3E", "3F",
"40", "41", "42", "43", "44", "45", "46", "47",
"48", "49", "4A", "4B", "4C", "4D", "4E", "4F",
"50", "51", "52", "53", "54", "55", "56", "57",
"58", "59", "5A", "5B", "5C", "5D", "5E", "5F",
"60", "61", "62", "63", "64", "65", "66", "67",
"68", "69", "6A", "6B", "6C", "6D", "6E", "6F",
"70", "71", "72", "73", "74", "75", "76", "77",
"78", "79", "7A", "7B", "7C", "7D", "7E", "7F",
"80", "81", "82", "83", "84", "85", "86", "87",
"88", "89", "8A", "8B", "8C", "8D", "8E", "8F",
"90", "91", "92", "93", "94", "95", "96", "97",
"98", "99", "9A", "9B", "9C", "9D", "9E", "9F",
"A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7",
"A8", "A9", "AA", "AB", "AC", "AD", "AE", "AF",
"B0", "B1", "B2", "B3", "B4", "B5", "B6", "B7",
"B8", "B9", "BA", "BB", "BC", "BD", "BE", "BF",
"C0", "C1", "C2", "C3", "C4", "C5", "C6", "C7",
"C8", "C9", "CA", "CB", "CC", "CD", "CE", "CF",
"D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
"D8", "D9", "DA", "DB", "DC", "DD", "DE", "DF",
"E0", "E1", "E2", "E3", "E4", "E5", "E6", "E7",
"E8", "E9", "EA", "EB", "EC", "ED", "EE", "EF",
"F0", "F1", "F2", "F3", "F4", "F5", "F6", "F7",
"F8", "F9", "FA", "FB", "FC", "FD", "FE", "FF",
};
private static readonly string[] binMap16 =
{
"00000000", "00000001", "00000010", "00000011", "00000100", "00000101", "00000110", "00000111",
"00001000", "00001001", "00001010", "00001011", "00001100", "00001101", "00001110", "00001111",
"00010000", "00010001", "00010010", "00010011", "00010100", "00010101", "00010110", "00010111",
"00011000", "00011001", "00011010", "00011011", "00011100", "00011101", "00011110", "00011111",
"00100000", "00100001", "00100010", "00100011", "00100100", "00100101", "00100110", "00100111",
"00101000", "00101001", "00101010", "00101011", "00101100", "00101101", "00101110", "00101111",
"00110000", "00110001", "00110010", "00110011", "00110100", "00110101", "00110110", "00110111",
"00111000", "00111001", "00111010", "00111011", "00111100", "00111101", "00111110", "00111111",
"01000000", "01000001", "01000010", "01000011", "01000100", "01000101", "01000110", "01000111",
"01001000", "01001001", "01001010", "01001011", "01001100", "01001101", "01001110", "01001111",
"01010000", "01010001", "01010010", "01010011", "01010100", "01010101", "01010110", "01010111",
"01011000", "01011001", "01011010", "01011011", "01011100", "01011101", "01011110", "01011111",
"01100000", "01100001", "01100010", "01100011", "01100100", "01100101", "01100110", "01100111",
"01101000", "01101001", "01101010", "01101011", "01101100", "01101101", "01101110", "01101111",
"01110000", "01110001", "01110010", "01110011", "01110100", "01110101", "01110110", "01110111",
"01111000", "01111001", "01111010", "01111011", "01111100", "01111101", "01111110", "01111111",
"10000000", "10000001", "10000010", "10000011", "10000100", "10000101", "10000110", "10000111",
"10001000", "10001001", "10001010", "10001011", "10001100", "10001101", "10001110", "10001111",
"10010000", "10010001", "10010010", "10010011", "10010100", "10010101", "10010110", "10010111",
"10011000", "10011001", "10011010", "10011011", "10011100", "10011101", "10011110", "10011111",
"10100000", "10100001", "10100010", "10100011", "10100100", "10100101", "10100110", "10100111",
"10101000", "10101001", "10101010", "10101011", "10101100", "10101101", "10101110", "10101111",
"10110000", "10110001", "10110010", "10110011", "10110100", "10110101", "10110110", "10110111",
"10111000", "10111001", "10111010", "10111011", "10111100", "10111101", "10111110", "10111111",
"11000000", "11000001", "11000010", "11000011", "11000100", "11000101", "11000110", "11000111",
"11001000", "11001001", "11001010", "11001011", "11001100", "11001101", "11001110", "11001111",
"11010000", "11010001", "11010010", "11010011", "11010100", "11010101", "11010110", "11010111",
"11011000", "11011001", "11011010", "11011011", "11011100", "11011101", "11011110", "11011111",
"11100000", "11100001", "11100010", "11100011", "11100100", "11100101", "11100110", "11100111",
"11101000", "11101001", "11101010", "11101011", "11101100", "11101101", "11101110", "11101111",
"11110000", "11110001", "11110010", "11110011", "11110100", "11110101", "11110110", "11110111",
"11111000", "11111001", "11111010", "11111011", "11111100", "11111101", "11111110", "11111111",
};
/// <summary>
/// Returns a hex string from <paramref name="value"/>, in big-endian order.
/// </summary>
public static string HexFromInt(int value)
{
ReadOnlySpan<char> buffer = stackalloc char[8]
{
hexMap8[(value & 0xf0000000) >> 28],
hexMap8[(value & 0x0f000000) >> 24],
hexMap8[(value & 0x00f00000) >> 20],
hexMap8[(value & 0x000f0000) >> 16],
hexMap8[(value & 0x0000f000) >> 12],
hexMap8[(value & 0x00000f00) >> 8],
hexMap8[(value & 0x000000f0) >> 4],
hexMap8[(value & 0x0000000f)],
};
return buffer.ToString();
}
/// <summary>
/// Appends a hex string from <paramref name="value"/> to <paramref name="sb"/>, in big-endian order.
/// </summary>
public static void AppendHexFromInt(StringBuilder sb, int value)
{
sb.Append(hexMap8[(value & 0xf0000000) >> 28]);
sb.Append(hexMap8[(value & 0x0f000000) >> 24]);
sb.Append(hexMap8[(value & 0x00f00000) >> 20]);
sb.Append(hexMap8[(value & 0x000f0000) >> 16]);
sb.Append(hexMap8[(value & 0x0000f000) >> 12]);
sb.Append(hexMap8[(value & 0x00000f00) >> 8]);
sb.Append(hexMap8[(value & 0x000000f0) >> 4]);
sb.Append(hexMap8[(value & 0x0000000f)]);
}
/// <summary>
/// Writes a hex string from <paramref name="value"/> to <paramref name="writer"/>, in big-endian order.
/// </summary>
public static void AppendHexFromInt(TextWriter writer, int value)
{
writer.Write(hexMap8[(value & 0xf0000000) >> 28]);
writer.Write(hexMap8[(value & 0x0f000000) >> 24]);
writer.Write(hexMap8[(value & 0x00f00000) >> 20]);
writer.Write(hexMap8[(value & 0x000f0000) >> 16]);
writer.Write(hexMap8[(value & 0x0000f000) >> 12]);
writer.Write(hexMap8[(value & 0x00000f00) >> 8]);
writer.Write(hexMap8[(value & 0x000000f0) >> 4]);
writer.Write(hexMap8[(value & 0x0000000f)]);
}
/// <summary>
/// Returns a hex string from <paramref name="value"/>, in big-endian order.
/// </summary>
public static string HexFromLong(long value)
{
ReadOnlySpan<char> buffer = stackalloc char[16]
{
hexMap8[((ulong)value & 0xf0000000_00000000) >> 60],
hexMap8[(value & 0x0f000000_00000000) >> 56],
hexMap8[(value & 0x00f00000_00000000) >> 52],
hexMap8[(value & 0x000f0000_00000000) >> 48],
hexMap8[(value & 0x0000f000_00000000) >> 44],
hexMap8[(value & 0x00000f00_00000000) >> 40],
hexMap8[(value & 0x000000f0_00000000) >> 36],
hexMap8[(value & 0x0000000f_00000000) >> 32],
hexMap8[(value & 0x00000000_f0000000) >> 28],
hexMap8[(value & 0x00000000_0f000000) >> 24],
hexMap8[(value & 0x00000000_00f00000) >> 20],
hexMap8[(value & 0x00000000_000f0000) >> 16],
hexMap8[(value & 0x00000000_0000f000) >> 12],
hexMap8[(value & 0x00000000_00000f00) >> 8],
hexMap8[(value & 0x00000000_000000f0) >> 4],
hexMap8[(value & 0x00000000_0000000f)],
};
return buffer.ToString();
}
/// <summary>
/// Appends a hex string from <paramref name="value"/> to <paramref name="sb"/>, in big-endian order.
/// </summary>
public static void AppendHexFromLong(StringBuilder sb, long value)
{
sb.Append(hexMap8[((ulong)value & 0xf0000000_00000000) >> 60]);
sb.Append(hexMap8[(value & 0x0f000000_00000000) >> 56]);
sb.Append(hexMap8[(value & 0x00f00000_00000000) >> 52]);
sb.Append(hexMap8[(value & 0x000f0000_00000000) >> 48]);
sb.Append(hexMap8[(value & 0x0000f000_00000000) >> 44]);
sb.Append(hexMap8[(value & 0x00000f00_00000000) >> 40]);
sb.Append(hexMap8[(value & 0x000000f0_00000000) >> 36]);
sb.Append(hexMap8[(value & 0x0000000f_00000000) >> 32]);
sb.Append(hexMap8[(value & 0x00000000_f0000000) >> 28]);
sb.Append(hexMap8[(value & 0x00000000_0f000000) >> 24]);
sb.Append(hexMap8[(value & 0x00000000_00f00000) >> 20]);
sb.Append(hexMap8[(value & 0x00000000_000f0000) >> 16]);
sb.Append(hexMap8[(value & 0x00000000_0000f000) >> 12]);
sb.Append(hexMap8[(value & 0x00000000_00000f00) >> 8]);
sb.Append(hexMap8[(value & 0x00000000_000000f0) >> 4]);
sb.Append(hexMap8[(value & 0x00000000_0000000f)]);
}
/// <summary>
/// Writes a hex string from <paramref name="value"/> to <paramref name="writer"/>, in big-endian order.
/// </summary>
public static void AppendHexFromLong(TextWriter writer, long value)
{
writer.Write(hexMap8[((ulong)value & 0xf0000000_00000000) >> 60]);
writer.Write(hexMap8[(value & 0x0f000000_00000000) >> 56]);
writer.Write(hexMap8[(value & 0x00f00000_00000000) >> 52]);
writer.Write(hexMap8[(value & 0x000f0000_00000000) >> 48]);
writer.Write(hexMap8[(value & 0x0000f000_00000000) >> 44]);
writer.Write(hexMap8[(value & 0x00000f00_00000000) >> 40]);
writer.Write(hexMap8[(value & 0x000000f0_00000000) >> 36]);
writer.Write(hexMap8[(value & 0x0000000f_00000000) >> 32]);
writer.Write(hexMap8[(value & 0x00000000_f0000000) >> 28]);
writer.Write(hexMap8[(value & 0x00000000_0f000000) >> 24]);
writer.Write(hexMap8[(value & 0x00000000_00f00000) >> 20]);
writer.Write(hexMap8[(value & 0x00000000_000f0000) >> 16]);
writer.Write(hexMap8[(value & 0x00000000_0000f000) >> 12]);
writer.Write(hexMap8[(value & 0x00000000_00000f00) >> 8]);
writer.Write(hexMap8[(value & 0x00000000_000000f0) >> 4]);
writer.Write(hexMap8[(value & 0x00000000_0000000f)]);
}
public static string HexFromByteArray(ReadOnlySpan<byte> data)
{
return HexFromByteArray(data, 0, data.Length);
}
public static string HexFromByteArray(ReadOnlySpan<byte> data, int index, int length)
{
if (index < 0 || index >= data.Length)
throw new ArgumentOutOfRangeException(nameof(index));
if (length < 0 || (index + length) > data.Length)
throw new ArgumentOutOfRangeException(nameof(length));
var sb = StringBuilderPool.Acquire(length * 2);
for (int i = index, c = index + length; i < c; ++i)
{
sb.Append(hexMap16[data[i]]);
}
return StringBuilderPool.GetStringAndRelease(sb);
}
public static void AppendHexFromByteArray(StringBuilder sb, ReadOnlySpan<byte> data)
{
AppendHexFromByteArray(sb, data, 0, data.Length);
}
public static void AppendHexFromByteArray(StringBuilder sb, ReadOnlySpan<byte> data, int index, int length)
{
if (index < 0 || index >= data.Length)
throw new ArgumentOutOfRangeException(nameof(index));
if (length < 0 || (index + length) > data.Length)
throw new ArgumentOutOfRangeException(nameof(length));
sb.EnsureCapacity(sb.Length + length * 2);
for (int i = index, c = index + length; i < c; ++i)
{
sb.Append(hexMap16[data[i]]);
}
}
public static void AppendHexFromByteArray(TextWriter writer, ReadOnlySpan<byte> data)
{
AppendHexFromByteArray(writer, data, 0, data.Length);
}
public static void AppendHexFromByteArray(TextWriter writer, ReadOnlySpan<byte> data, int index, int length)
{
if (index < 0 || index >= data.Length)
throw new ArgumentOutOfRangeException(nameof(index));
if (length < 0 || (index + length) > data.Length)
throw new ArgumentOutOfRangeException(nameof(length));
for (int i = index, c = index + length; i < c; ++i)
{
writer.Write(hexMap16[data[i]]);
}
}
/// <summary>
/// Parses <paramref name="str"/> in big-endian order and returns a 32-bit integer.
/// </summary>
public static int IntFromHex(string str)
{
return (byteInHex(str, 0) << 24)
| (byteInHex(str, 2) << 16)
| (byteInHex(str, 4) << 8)
| byteInHex(str, 6);
}
/// <summary>
/// Parses <paramref name="str"/> in big-endian order and returns a 64-bit integer.
/// </summary>
public static long LongFromHex(string str)
{
return (byteInHex(str, 0) << 56)
| (byteInHex(str, 2) << 48)
| (byteInHex(str, 4) << 40)
| (byteInHex(str, 6) << 32)
| (byteInHex(str, 8) << 24)
| (byteInHex(str, 10) << 16)
| (byteInHex(str, 12) << 8)
| byteInHex(str, 14);
}
public static byte[] ByteArrayFromHex(string str)
{
return ByteArrayFromHex(str, 0, str.Length);
}
public static byte[] ByteArrayFromHex(string str, int index, int length)
{
if (index < 0 || index >= str.Length)
throw new ArgumentOutOfRangeException(nameof(index));
if (length < 0 || (index + length) > str.Length)
throw new ArgumentOutOfRangeException(nameof(length));
byte[] arr = new byte[length / 2];
for (int i = index, c = index + length; i < c; i += 2)
{
arr[(i - index) / 2] = byteInHex(str, i);
}
return arr;
}
private static byte byteInHex(string str, int index)
{
char high = str[index];
char low = str[index + 1];
return (byte)((intFromHexDigit(high) << 4) | intFromHexDigit(low));
}
private static int intFromHexDigit(char digit) => digit switch
{
'0' or '1' or '2' or '3' or '4' or '5' or '6' or '7' or '8' or '9' => digit - '0',
'a' or 'b' or 'c' or 'd' or 'e' or 'f' => digit - 'a' + 10,
'A' or 'B' or 'C' or 'D' or 'E' or 'F' => digit - 'A' + 10,
_ => 0,
};
}
}