52 lines
1.5 KiB
C#
52 lines
1.5 KiB
C#
/*
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Copyright (C) 2014-2019 de4dot@gmail.com
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This file is part of dnSpy
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dnSpy is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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dnSpy is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with dnSpy. If not, see <http://www.gnu.org/licenses/>.
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*/
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namespace dnSpy.Debugger.DotNet.Metadata {
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static class HexUtils {
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public static byte[]? ParseBytes(string hexString) {
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try {
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if (hexString.Length % 2 != 0)
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return null;
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var bytes = new byte[hexString.Length / 2];
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for (int i = 0; i < hexString.Length; i += 2) {
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int upper = TryParseHexChar(hexString[i]);
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int lower = TryParseHexChar(hexString[i + 1]);
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if (upper < 0 || lower < 0)
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return null;
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bytes[i / 2] = (byte)((upper << 4) | lower);
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}
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return bytes;
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}
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catch {
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return null;
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}
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}
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static int TryParseHexChar(char c) {
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if ('0' <= c && c <= '9')
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return (ushort)c - (ushort)'0';
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if ('a' <= c && c <= 'f')
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return 10 + (ushort)c - (ushort)'a';
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if ('A' <= c && c <= 'F')
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return 10 + (ushort)c - (ushort)'A';
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return -1;
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}
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}
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}
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