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Unit tests, refactoring and bugfixes for the database. Replies to messages in

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other groups no longer affect sendability, which makes it safe to delete all
messages from a group when unsubscribing.
This commit is contained in:
akwizgran
2011-07-05 14:16:29 +01:00
parent eb752ada62
commit f97393f160
8 changed files with 263 additions and 71 deletions
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39
util/net/sf/briar/util/StringUtils.java
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@@ -2,6 +2,11 @@ package net.sf.briar.util;
public class StringUtils {
private static final char[] HEX = new char[] {
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
};
/**
* Trims the given string to the given length, returning the head and
* appending "..." if the string was trimmed.
@@ -19,4 +24,38 @@ public class StringUtils {
if(s.length() > length) return "..." + s.substring(s.length() - length);
else return s;
}
/** Converts the given raw byte array to a hex string. */
public static String toHexString(byte[] bytes) {
StringBuilder s = new StringBuilder(bytes.length * 2);
for(byte b : bytes) {
int high = (b >> 4) & 0xF;
s.append(HEX[high]);
int low = b & 0xF;
s.append(HEX[low]);
}
return s.toString();
}
/** Converts the given hex string to a raw byte array. */
public static byte[] fromHexString(String hex) {
int len = hex.length();
if(len % 2 != 0) throw new IllegalArgumentException("Not a hex string");
byte[] bytes = new byte[len / 2];
for(int i = 0, j = 0; i < len; i += 2, j++) {
int high = hexDigitToInt(hex.charAt(i));
int low = hexDigitToInt(hex.charAt(i + 1));
int b = (high << 4) + low;
if(b > 127) b -= 256;
bytes[j] = (byte) b;
}
return bytes;
}
private static int hexDigitToInt(char c) {
if(c >= '0' && c <= '9') return c - '0';
if(c >= 'A' && c <= 'F') return c - 'A' + 10;
if(c >= 'a' && c <= 'f') return c - 'a' + 10;
throw new IllegalArgumentException("Not a hex digit: " + c);
}
}