package com.thaiopensource.datatype.xsd;
import org.relaxng.datatype.ValidationContext;
class HexBinaryDatatype extends BinaryDatatype {
static private final int INVALID = -1;
static private final int WHITESPACE = -2;
boolean lexicallyAllows(String str) {
int len = str.length();
int i = 0;
while (i < len && weight(str.charAt(i)) == WHITESPACE)
i++;
while (i + 1 < len && weight(str.charAt(i)) >= 0 && weight(str.charAt(i + 1)) >= 0)
i += 2;
while (i < len && weight(str.charAt(i)) == WHITESPACE)
i++;
return i == len;
}
String getLexicalSpaceKey() {
return "hex";
}
Object getValue(String str, ValidationContext vc) {
int len = str.length();
int start = 0;
while (start < len && weight(str.charAt(start)) == WHITESPACE)
start++;
int end = len;
while (end > start && weight(str.charAt(end - 1)) == WHITESPACE)
end--;
byte[] value = new byte[(end - start) >> 1];
int j = 0;
for (int i = start; i < end; i += 2, j++)
value[j] = (byte)((weight(str.charAt(i)) << 4) | weight(str.charAt(i + 1)));
return value;
}
static private int weight(char c) {
switch (c) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
return c - '0';
case 'A': case 'B': case 'C':
case 'D': case 'E': case 'F':
return c + (10 - 'A');
case 'a': case 'b': case 'c':
case 'd': case 'e': case 'f':
return c + (10 - 'a');
case ' ': case '\n': case '\r': case '\t':
return WHITESPACE;
}
return INVALID;
}
}