If the following byte is less than 0x80, quote from static window n, else quote from dynamic window n. */ static final byte SQ0 = 0x01; // Quote from window pair 0 static final byte SQ1 = 0x02; // Quote from window pair 1 static final byte SQ2 = 0x03; // Quote from window pair 2 static final byte SQ3 = 0x04; // Quote from window pair 3 static final byte SQ4 = 0x05; // Quote from window pair 4 static final byte SQ5 = 0x06; // Quote from window pair 5 static final byte SQ6 = 0x07; // Quote from window pair 6 static final byte SQ7 = 0x08; // Quote from window pair 7 static final byte SDX = 0x0B; // Define a window as extended static final byte Srs = 0x0C; // reserved static final byte SQU = 0x0E; // Quote a single Unicode character static final byte SCU = 0x0F; // Change to Unicode mode /** SCn Change to Window n.
If the following bytes are less than 0x80, interpret them as command bytes or pass them through, else add the offset for dynamic window n. */ static final byte SC0 = 0x10; // Select window 0 static final byte SC1 = 0x11; // Select window 1 static final byte SC2 = 0x12; // Select window 2 static final byte SC3 = 0x13; // Select window 3 static final byte SC4 = 0x14; // Select window 4 static final byte SC5 = 0x15; // Select window 5 static final byte SC6 = 0x16; // Select window 6 static final byte SC7 = 0x17; // Select window 7 static final byte SD0 = 0x18; // Define and select window 0 static final byte SD1 = 0x19; // Define and select window 1 static final byte SD2 = 0x1A; // Define and select window 2 static final byte SD3 = 0x1B; // Define and select window 3 static final byte SD4 = 0x1C; // Define and select window 4 static final byte SD5 = 0x1D; // Define and select window 5 static final byte SD6 = 0x1E; // Define and select window 6 static final byte SD7 = 0x1F; // Define and select window 7 static final byte UC0 = (byte) 0xE0; // Select window 0 static final byte UC1 = (byte) 0xE1; // Select window 1 static final byte UC2 = (byte) 0xE2; // Select window 2 static final byte UC3 = (byte) 0xE3; // Select window 3 static final byte UC4 = (byte) 0xE4; // Select window 4 static final byte UC5 = (byte) 0xE5; // Select window 5 static final byte UC6 = (byte) 0xE6; // Select window 6 static final byte UC7 = (byte) 0xE7; // Select window 7 static final byte UD0 = (byte) 0xE8; // Define and select window 0 static final byte UD1 = (byte) 0xE9; // Define and select window 1 static final byte UD2 = (byte) 0xEA; // Define and select window 2 static final byte UD3 = (byte) 0xEB; // Define and select window 3 static final byte UD4 = (byte) 0xEC; // Define and select window 4 static final byte UD5 = (byte) 0xED; // Define and select window 5 static final byte UD6 = (byte) 0xEE; // Define and select window 6 static final byte UD7 = (byte) 0xEF; // Define and select window 7 static final byte UQU = (byte) 0xF0; // Quote a single Unicode character static final byte UDX = (byte) 0xF1; // Define a Window as extended static final byte Urs = (byte) 0xF2; // reserved /** constant offsets for the 8 static windows */ static final int staticOffset[] = { 0x0000, // ASCII for quoted tags 0x0080, // Latin - 1 Supplement (for access to punctuation) 0x0100, // Latin Extended-A 0x0300, // Combining Diacritical Marks 0x2000, // General Punctuation 0x2080, // Currency Symbols 0x2100, // Letterlike Symbols and Number Forms 0x3000 // CJK Symbols and punctuation }; /** initial offsets for the 8 dynamic (sliding) windows */ static final int initialDynamicOffset[] = { 0x0080, // Latin-1 0x00C0, // Latin Extended A //@005 fixed from 0x0100 0x0400, // Cyrillic 0x0600, // Arabic 0x0900, // Devanagari 0x3040, // Hiragana 0x30A0, // Katakana 0xFF00 // Fullwidth ASCII }; /** dynamic window offsets, intitialize to default values. */ int dynamicOffset[] = { initialDynamicOffset[0], initialDynamicOffset[1], initialDynamicOffset[2], initialDynamicOffset[3], initialDynamicOffset[4], initialDynamicOffset[5], initialDynamicOffset[6], initialDynamicOffset[7] }; // The following method is common to encoder and decoder private int iWindow = 0; // current active window /** select the active dynamic window **/ protected void selectWindow(int iWindow) { this.iWindow = iWindow; } /** select the active dynamic window **/ protected int getCurrentWindow() { return this.iWindow; } /** These values are used in defineWindow **/ /** * Unicode code points from 3400 to E000 are not adressible by * dynamic window, since in these areas no short run alphabets are * found. Therefore add gapOffset to all values from gapThreshold */ static final int gapThreshold = 0x68; static final int gapOffset = 0xAC00; /* values between reservedStart and fixedThreshold are reserved */ static final int reservedStart = 0xA8; /* use table of predefined fixed offsets for values from fixedThreshold */ static final int fixedThreshold = 0xF9; /** Table of fixed predefined Offsets, and byte values that index into **/ static final int fixedOffset[] = { /* 0xF9 */ 0x00C0, // Latin-1 Letters + half of Latin Extended A /* 0xFA */ 0x0250, // IPA extensions /* 0xFB */ 0x0370, // Greek /* 0xFC */ 0x0530, // Armenian /* 0xFD */ 0x3040, // Hiragana /* 0xFE */ 0x30A0, // Katakana /* 0xFF */ 0xFF60 // Halfwidth Katakana }; /** whether a character is compressible */ public static boolean isCompressible(char ch) { return (ch < 0x3400 || ch >= 0xE000); } /** reset is only needed to bail out after an exception and restart with new input */ protected public void reset() { // reset the dynamic windows for (int i = 0; i < dynamicOffset.length; i++) { dynamicOffset[i] = initialDynamicOffset[i]; } this.iWindow = 0; } }