/**
* Adds an Arabic character with an attached diacritic to the table.
*
* @param unicodeType
* the type of Unicode character
*
* @param ch
* the output character
*
* @param characterType
* the type of Arabic character
*
* @param diacriticType
* the type of diacritic
*/
protected void addItem(UnicodeType unicodeType, char ch, CharacterType characterType, DiacriticType diacriticType)
{
// Create the item that will be added to the table.
EncodingTableItem item = new EncodingTableItem(characterType, diacriticType);
// Unicode --> item
unicodeMap[ch] = item;
// Character type --> Unicode
if (characterType != CharacterType.Unknown && diacriticType == DiacriticType.Unknown)
{
characterList[(int)characterType] = ch;
}
// Unicode type --> Unicode
unicodeList[(int)unicodeType] = ch;
}
/**
* Attaches a diacritic to the last character in the buffer.
*
* @param diacriticType
* the type of diacritic to attach, such as <i>Fatha</i> or
* <i>Shadda</i>.
*/
public void add(DiacriticType diacriticType)
{
// Get offset into buffer, based on last character.
int offset = (characterCount - 1) * ByteFormat.CHARACTER_WIDTH;
// Set the diacritic.
ByteFormat.setDiacritic(buffer, offset, diacriticType);
}
/**
* Adds a diacritic to the table.
*
* @param unicodeType
* the type of Unicode character
*
* @param ch
* the output character
*
* @param diacriticType
* the type of diacritic
*/
protected void addItem(UnicodeType unicodeType, char ch, DiacriticType diacriticType)
{
this.addItem(unicodeType, ch, CharacterType.Unknown, diacriticType);
}
/**
* Sets a diacritic as present.
*
* @param buffer
* the <code>byte[]</code> buffer
*
* @param offset
* the offset of the character
*
* @param diacriticType
* the type of diacritic to set
*/
public static void setDiacritic(byte[] buffer, int offset, DiacriticType diacriticType)
{
// Convert enum to integer.
int value = (int)diacriticType;
// Get offset into buffer, based on last character.
int byteOffset = offset + diacriticOffsets[value];
// Get bit mask.
int bitMask = diacriticMasks[value];
// Set bit.
buffer[byteOffset] |= (byte)bitMask;
}
/**
* Determines if only a single diacritic is attached.
*
* @param buffer
* the <code>byte[]</code> buffer
*
* @param offset
* the offset of the character
*
* @param diacriticType
* the single diacritic
* @return <code>true</code> if the character has only the specified
* diacritic and no others; <code>false</code> otherwise.
*/
public static bool isSingleDiacritic(byte[] buffer, int offset,
DiacriticType diacriticType)
{
// Get diacritic offset and bitmask.
int ordinal = (int)diacriticType;
int diacriticOffset = diacriticOffsets[ordinal];
int bitMask = diacriticMasks[ordinal];
// Validate.
return buffer[offset + diacriticOffset] == bitMask
&& buffer[offset + 3 - diacriticOffset] == 0;
}
/**
* Determines if a diacritic is present.
*
* @param buffer
* the <code>byte[]</code> buffer
*
* @param offset
* the offset of the character
*
* @param diacriticType
* the type of diacritic
*
* @return <code>true</code> if the diacritic is present; <code>false</code>
* otherwise
*/
public static bool isDiacritic(byte[] buffer, int offset,
DiacriticType diacriticType)
{
// Convert enum to integer.
int value = (int)diacriticType;
// Get offset into buffer, based on last character.
int byteOffset = offset + diacriticOffsets[value];
// Get bit mask.
int bitMask = diacriticMasks[value];
// Get bit.
return (buffer[byteOffset] & bitMask) != 0;
}
public EncodingTableItem(CharacterType characterType, DiacriticType diacriticType)
{
this.CharacterType = characterType;
this.DiacriticType = diacriticType;
}
