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Add `HexUtils`

This commit is contained in:
wtfsck 2022-06-21 23:53:42 +02:00
parent 761633685f
commit 90d1dec769
1 changed files with 51 additions and 0 deletions
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51
src/java/iced-x86/src/test/java/com/github/icedland/iced/x86/HexUtils.java Normal file
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// SPDX-License-Identifier: MIT
// Copyright (C) 2018-present iced project and contributors
package com.github.icedland.iced.x86;
public final class HexUtils {
public static byte[] toByteArray(String hexData) {
if (hexData == null)
throw new NullPointerException();
if (hexData.length() == 0)
return new byte[0];
int len = 0;
for (int i = 0; i < hexData.length(); i++) {
if (hexData.charAt(i) != ' ')
len++;
}
byte[] data = new byte[len / 2];
int w = 0;
for (int i = 0; ;) {
while (i < hexData.length() && Character.isWhitespace(hexData.charAt(i)))
i++;
if (i >= hexData.length())
break;
int hi = tryParseHexChar(hexData.charAt(i++));
if (hi < 0)
throw new UnsupportedOperationException();
while (i < hexData.length() && Character.isWhitespace(hexData.charAt(i)))
i++;
if (i >= hexData.length())
throw new UnsupportedOperationException();
int lo = tryParseHexChar(hexData.charAt(i++));
if (lo < 0)
throw new UnsupportedOperationException();
data[w++] = (byte)((hi << 4) | lo);
}
if (w != data.length)
throw new UnsupportedOperationException();
return data;
}
private static int tryParseHexChar(char c) {
if ('0' <= c && c <= '9')
return c - '0';
if ('A' <= c && c <= 'F')
return c - 'A' + 10;
if ('a' <= c && c <= 'f')
return c - 'a' + 10;
return -1;
}
}