private static char encodeASCIIDigits(char c, char c1) {
if (HighLevelEncoder.isDigit(c) && HighLevelEncoder.isDigit(c1)) {
return (char) ((c - 48) * 10 + (c1 - 48) + 130);
} else {
throw new IllegalArgumentException(
(new StringBuilder("not digits: ")).append(c).append(c1).toString());
}
}
public final void encode(EncoderContext encodercontext) {
if (HighLevelEncoder.determineConsecutiveDigitCount(
encodercontext.getMessage(), encodercontext.pos)
>= 2) {
encodercontext.writeCodeword(
encodeASCIIDigits(
encodercontext.getMessage().charAt(encodercontext.pos),
encodercontext.getMessage().charAt(encodercontext.pos + 1)));
encodercontext.pos = encodercontext.pos + 2;
return;
}
char c = encodercontext.getCurrentChar();
int i =
HighLevelEncoder.lookAheadTest(
encodercontext.getMessage(), encodercontext.pos, getEncodingMode());
if (i != getEncodingMode()) {
switch (i) {
default:
throw new IllegalStateException(
(new StringBuilder("Illegal mode: ")).append(i).toString());
case 5: // '\005'
encodercontext.writeCodeword('\347');
encodercontext.signalEncoderChange(5);
return;
case 1: // '\001'
encodercontext.writeCodeword('\346');
encodercontext.signalEncoderChange(1);
return;
case 3: // '\003'
encodercontext.writeCodeword('\356');
encodercontext.signalEncoderChange(3);
return;
case 2: // '\002'
encodercontext.writeCodeword('\357');
encodercontext.signalEncoderChange(2);
return;
case 4: // '\004'
encodercontext.writeCodeword('\360');
encodercontext.signalEncoderChange(4);
return;
}
}
if (HighLevelEncoder.isExtendedASCII(c)) {
encodercontext.writeCodeword('\353');
encodercontext.writeCodeword((char) ((c - 128) + 1));
encodercontext.pos = encodercontext.pos + 1;
return;
} else {
encodercontext.writeCodeword((char) (c + 1));
encodercontext.pos = encodercontext.pos + 1;
return;
}
}
@Override
int encodeChar(char c, StringBuilder sb) {
switch (c) {
case '\r':
sb.append('\0');
break;
case '*':
sb.append('\1');
break;
case '>':
sb.append('\2');
break;
case ' ':
sb.append('\3');
break;
default:
if (c >= '0' && c <= '9') {
sb.append((char) (c - 48 + 4));
} else if (c >= 'A' && c <= 'Z') {
sb.append((char) (c - 65 + 14));
} else {
HighLevelEncoder.illegalCharacter(c);
}
break;
}
return 1;
}
@Override
int encodeChar(char c, StringBuilder sb) {
if (c == '\r') {
sb.append('\0');
} else if (c == '*') {
sb.append('\1');
} else if (c == '>') {
sb.append('\2');
} else if (c == ' ') {
sb.append('\3');
} else if (c >= '0' && c <= '9') {
sb.append((char) (c - 48 + 4));
} else if (c >= 'A' && c <= 'Z') {
sb.append((char) (c - 65 + 14));
} else {
HighLevelEncoder.illegalCharacter(c);
}
return 1;
}
@Override
public void encode(EncoderContext context) {
// step C
StringBuilder buffer = new StringBuilder();
while (context.hasMoreCharacters()) {
char c = context.getCurrentChar();
context.pos++;
encodeChar(c, buffer);
int count = buffer.length();
if ((count % 3) == 0) {
writeNextTriplet(context, buffer);
int newMode =
HighLevelEncoder.lookAheadTest(context.getMessage(), context.pos, getEncodingMode());
if (newMode != getEncodingMode()) {
context.signalEncoderChange(newMode);
break;
}
}
}
handleEOD(context, buffer);
}
