diff options
Diffstat (limited to 'libjava/classpath/java/util/zip/InflaterDynHeader.java')
| -rw-r--r-- | libjava/classpath/java/util/zip/InflaterDynHeader.java | 230 |
1 files changed, 115 insertions, 115 deletions
diff --git a/libjava/classpath/java/util/zip/InflaterDynHeader.java b/libjava/classpath/java/util/zip/InflaterDynHeader.java index bff84a894d8..64e08d6bbb5 100644 --- a/libjava/classpath/java/util/zip/InflaterDynHeader.java +++ b/libjava/classpath/java/util/zip/InflaterDynHeader.java @@ -49,12 +49,12 @@ class InflaterDynHeader private static final int repMin[] = { 3, 3, 11 }; private static final int repBits[] = { 2, 3, 7 }; - + private byte[] blLens; private byte[] litdistLens; private InflaterHuffmanTree blTree; - + private int mode; private int lnum, dnum, blnum, num; private int repSymbol; @@ -63,127 +63,127 @@ class InflaterDynHeader private static final int[] BL_ORDER = { 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15 }; - + public InflaterDynHeader() { } - + public boolean decode(StreamManipulator input) throws DataFormatException { decode_loop: for (;;) { - switch (mode) - { - case LNUM: - lnum = input.peekBits(5); - if (lnum < 0) - return false; - lnum += 257; - input.dropBits(5); -// System.err.println("LNUM: "+lnum); - mode = DNUM; - /* fall through */ - case DNUM: - dnum = input.peekBits(5); - if (dnum < 0) - return false; - dnum++; - input.dropBits(5); -// System.err.println("DNUM: "+dnum); - num = lnum+dnum; - litdistLens = new byte[num]; - mode = BLNUM; - /* fall through */ - case BLNUM: - blnum = input.peekBits(4); - if (blnum < 0) - return false; - blnum += 4; - input.dropBits(4); - blLens = new byte[19]; - ptr = 0; -// System.err.println("BLNUM: "+blnum); - mode = BLLENS; - /* fall through */ - case BLLENS: - while (ptr < blnum) - { - int len = input.peekBits(3); - if (len < 0) - return false; - input.dropBits(3); -// System.err.println("blLens["+BL_ORDER[ptr]+"]: "+len); - blLens[BL_ORDER[ptr]] = (byte) len; - ptr++; - } - blTree = new InflaterHuffmanTree(blLens); - blLens = null; - ptr = 0; - mode = LENS; - /* fall through */ - case LENS: - { - int symbol; - while (((symbol = blTree.getSymbol(input)) & ~15) == 0) - { - /* Normal case: symbol in [0..15] */ - -// System.err.println("litdistLens["+ptr+"]: "+symbol); - litdistLens[ptr++] = lastLen = (byte) symbol; - - if (ptr == num) - { - /* Finished */ - return true; - } - } - - /* need more input ? */ - if (symbol < 0) - return false; - - /* otherwise repeat code */ - if (symbol >= 17) - { - /* repeat zero */ -// System.err.println("repeating zero"); - lastLen = 0; - } - else - { - if (ptr == 0) - throw new DataFormatException(); - } - repSymbol = symbol-16; - mode = REPS; - } - /* fall through */ - - case REPS: - { - int bits = repBits[repSymbol]; - int count = input.peekBits(bits); - if (count < 0) - return false; - input.dropBits(bits); - count += repMin[repSymbol]; -// System.err.println("litdistLens repeated: "+count); - - if (ptr + count > num) - throw new DataFormatException(); - while (count-- > 0) - litdistLens[ptr++] = lastLen; - - if (ptr == num) - { - /* Finished */ - return true; - } - } - mode = LENS; - continue decode_loop; - } + switch (mode) + { + case LNUM: + lnum = input.peekBits(5); + if (lnum < 0) + return false; + lnum += 257; + input.dropBits(5); +// System.err.println("LNUM: "+lnum); + mode = DNUM; + /* fall through */ + case DNUM: + dnum = input.peekBits(5); + if (dnum < 0) + return false; + dnum++; + input.dropBits(5); +// System.err.println("DNUM: "+dnum); + num = lnum+dnum; + litdistLens = new byte[num]; + mode = BLNUM; + /* fall through */ + case BLNUM: + blnum = input.peekBits(4); + if (blnum < 0) + return false; + blnum += 4; + input.dropBits(4); + blLens = new byte[19]; + ptr = 0; +// System.err.println("BLNUM: "+blnum); + mode = BLLENS; + /* fall through */ + case BLLENS: + while (ptr < blnum) + { + int len = input.peekBits(3); + if (len < 0) + return false; + input.dropBits(3); +// System.err.println("blLens["+BL_ORDER[ptr]+"]: "+len); + blLens[BL_ORDER[ptr]] = (byte) len; + ptr++; + } + blTree = new InflaterHuffmanTree(blLens); + blLens = null; + ptr = 0; + mode = LENS; + /* fall through */ + case LENS: + { + int symbol; + while (((symbol = blTree.getSymbol(input)) & ~15) == 0) + { + /* Normal case: symbol in [0..15] */ + +// System.err.println("litdistLens["+ptr+"]: "+symbol); + litdistLens[ptr++] = lastLen = (byte) symbol; + + if (ptr == num) + { + /* Finished */ + return true; + } + } + + /* need more input ? */ + if (symbol < 0) + return false; + + /* otherwise repeat code */ + if (symbol >= 17) + { + /* repeat zero */ +// System.err.println("repeating zero"); + lastLen = 0; + } + else + { + if (ptr == 0) + throw new DataFormatException(); + } + repSymbol = symbol-16; + mode = REPS; + } + /* fall through */ + + case REPS: + { + int bits = repBits[repSymbol]; + int count = input.peekBits(bits); + if (count < 0) + return false; + input.dropBits(bits); + count += repMin[repSymbol]; +// System.err.println("litdistLens repeated: "+count); + + if (ptr + count > num) + throw new DataFormatException(); + while (count-- > 0) + litdistLens[ptr++] = lastLen; + + if (ptr == num) + { + /* Finished */ + return true; + } + } + mode = LENS; + continue decode_loop; + } } } |
