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Code Issues Releases Wiki Activity

util/HexDump with space separated hex strings

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This commit is contained in:
kai-morich 2023-07-30 09:43:50 +02:00
parent d15f4d52bb
commit 7aecce7943
1 changed files with 8 additions and 5 deletions
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13
usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/util/HexDump.java
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@ -20,7 +20,7 @@ import java.security.InvalidParameterException;
/** /**
* Clone of Android's /core/java/com/android/internal/util/HexDump class, for use in debugging. * Clone of Android's /core/java/com/android/internal/util/HexDump class, for use in debugging.
* Cosmetic changes only. * Changes: space separated hex strings
*/ */
public class HexDump { public class HexDump {
private final static char[] HEX_DIGITS = { private final static char[] HEX_DIGITS = {
@ -82,10 +82,12 @@ public class HexDump {
} }
public static String toHexString(byte[] array, int offset, int length) { public static String toHexString(byte[] array, int offset, int length) {
char[] buf = new char[length * 2]; char[] buf = new char[length > 0 ? length * 3 - 1 : 0];
int bufIndex = 0; int bufIndex = 0;
for (int i = offset; i < offset + length; i++) { for (int i = offset; i < offset + length; i++) {
if (i > offset)
buf[bufIndex++] = ' ';
byte b = array[i]; byte b = array[i];
buf[bufIndex++] = HEX_DIGITS[(b >>> 4) & 0x0F]; buf[bufIndex++] = HEX_DIGITS[(b >>> 4) & 0x0F];
buf[bufIndex++] = HEX_DIGITS[b & 0x0F]; buf[bufIndex++] = HEX_DIGITS[b & 0x0F];
@ -139,12 +141,13 @@ public class HexDump {
throw new InvalidParameterException("Invalid hex char '" + c + "'"); throw new InvalidParameterException("Invalid hex char '" + c + "'");
} }
/** accepts any separator, e.g. space or newline */
public static byte[] hexStringToByteArray(String hexString) { public static byte[] hexStringToByteArray(String hexString) {
int length = hexString.length(); int length = hexString.length();
byte[] buffer = new byte[length / 2]; byte[] buffer = new byte[(length + 1) / 3];
for (int i = 0; i < length; i += 2) { for (int i = 0; i < length; i += 3) {
buffer[i / 2] = (byte) ((toByte(hexString.charAt(i)) << 4) | toByte(hexString.charAt(i + 1))); buffer[i / 3] = (byte) ((toByte(hexString.charAt(i)) << 4) | toByte(hexString.charAt(i + 1)));
} }
return buffer; return buffer;