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jdk/src/java.base/share/classes/com/sun/java/util/jar/pack/BandStructure.java
changeset 32649 2ee9017c7597
parent 25859 3317bb8137f4
equal deleted inserted replaced
32648:1fa861caf840 32649:2ee9017c7597 
    71 
    71 
    72     // Various heuristic options.
 
    72     // Various heuristic options.
 
    73     boolean optVaryCodings = !p200.getBoolean(Utils.COM_PREFIX+"no.vary.codings");
 
    73     boolean optVaryCodings = !p200.getBoolean(Utils.COM_PREFIX+"no.vary.codings");
 
    74     boolean optBigStrings = !p200.getBoolean(Utils.COM_PREFIX+"no.big.strings");
 
    74     boolean optBigStrings = !p200.getBoolean(Utils.COM_PREFIX+"no.big.strings");
 
    75 
    75 
    76     abstract protected Index getCPIndex(byte tag);
 
    76     protected abstract Index getCPIndex(byte tag);
 
    77 
    77 
    78     // Local copy of highest class version.
 
    78     // Local copy of highest class version.
 
    79     private Package.Version highestClassVersion = null;
 
    79     private Package.Version highestClassVersion = null;
 
    80 
    80 
    81     /** Call this exactly once, early, to specify the archive major version. */
 
    81     /** Call this exactly once, early, to specify the archive major version. */
 
    95 
    95 
    96     private final boolean isReader = this instanceof PackageReader;
 
    96     private final boolean isReader = this instanceof PackageReader;
 
    97 
    97 
    98     protected BandStructure() {}
 
    98     protected BandStructure() {}
 
    99 
    99 
   100     final static Coding BYTE1 = Coding.of(1,256);
 
   100     static final Coding BYTE1 = Coding.of(1,256);
 
   101 
   101 
   102     final static Coding CHAR3 = Coding.of(3,128);
 
   102     static final Coding CHAR3 = Coding.of(3,128);
 
   103     // Note:  Tried sharper (3,16) with no post-zip benefit.
 
   103     // Note:  Tried sharper (3,16) with no post-zip benefit.
 
   104 
   104 
   105     // This is best used with BCI values:
 
   105     // This is best used with BCI values:
 
   106     final static Coding BCI5 = Coding.of(5,4);  // mostly 1-byte offsets
 
   106     static final Coding BCI5 = Coding.of(5,4);  // mostly 1-byte offsets
 
   107     final static Coding BRANCH5 = Coding.of(5,4,2); // mostly forward branches
 
   107     static final Coding BRANCH5 = Coding.of(5,4,2); // mostly forward branches
 
   108 
   108 
   109     final static Coding UNSIGNED5 = Coding.of(5,64);
 
   109     static final Coding UNSIGNED5 = Coding.of(5,64);
 
   110     final static Coding UDELTA5 = UNSIGNED5.getDeltaCoding();
 
   110     static final Coding UDELTA5 = UNSIGNED5.getDeltaCoding();
 
   111     // "sharp" (5,64) zips 0.4% better than "medium" (5,128)
 
   111     // "sharp" (5,64) zips 0.4% better than "medium" (5,128)
 
   112     // It zips 1.1% better than "flat" (5,192)
 
   112     // It zips 1.1% better than "flat" (5,192)
 
   113 
   113 
   114     final static Coding SIGNED5 = Coding.of(5,64,1);  //sharp
 
   114     static final Coding SIGNED5 = Coding.of(5,64,1);  //sharp
 
   115     final static Coding DELTA5 = SIGNED5.getDeltaCoding();
 
   115     static final Coding DELTA5 = SIGNED5.getDeltaCoding();
 
   116     // Note:  Tried (5,128,2) and (5,192,2) with no benefit.
 
   116     // Note:  Tried (5,128,2) and (5,192,2) with no benefit.
 
   117 
   117 
   118     final static Coding MDELTA5 = Coding.of(5,64,2).getDeltaCoding();
 
   118     static final Coding MDELTA5 = Coding.of(5,64,2).getDeltaCoding();
 
   119 
   119 
   120     final private static Coding[] basicCodings = {
 
   120     private static final Coding[] basicCodings = {
 
   121         // Table of "Canonical BHSD Codings" from Pack200 spec.
 
   121         // Table of "Canonical BHSD Codings" from Pack200 spec.
 
   122         null,  // _meta_default
 
   122         null,  // _meta_default
 
   123 
   123 
   124         // Fixed-length codings:
 
   124         // Fixed-length codings:
 
   125         Coding.of(1,256,0),
 
   125         Coding.of(1,256,0),
 
   248         Coding.of(4,248,0).getDeltaCoding(),
 
   248         Coding.of(4,248,0).getDeltaCoding(),
 
   249         Coding.of(4,248,1).getDeltaCoding(),
 
   249         Coding.of(4,248,1).getDeltaCoding(),
 
   250 
   250 
   251         null
 
   251         null
 
   252     };
 
   252     };
 
   253     final private static Map<Coding, Integer> basicCodingIndexes;
 
   253     private static final Map<Coding, Integer> basicCodingIndexes;
 
   254     static {
 
   254     static {
 
   255         assert(basicCodings[_meta_default] == null);
 
   255         assert(basicCodings[_meta_default] == null);
 
   256         assert(basicCodings[_meta_canon_min] != null);
 
   256         assert(basicCodings[_meta_canon_min] != null);
 
   257         assert(basicCodings[_meta_canon_max] != null);
 
   257         assert(basicCodings[_meta_canon_max] != null);
 
   258         Map<Coding, Integer> map = new HashMap<>();
 
   258         Map<Coding, Integer> map = new HashMap<>();
 
   360 
   360 
   361         private int    valuesExpected;
 
   361         private int    valuesExpected;
 
   362 
   362 
   363         protected long outputSize = -1;  // cache
 
   363         protected long outputSize = -1;  // cache
 
   364 
   364 
   365         final public Coding regularCoding;
 
   365         public final Coding regularCoding;
 
   366 
   366 
   367         final public int seqForDebug;
 
   367         public final int seqForDebug;
 
   368         public int       elementCountForDebug;
 
   368         public int       elementCountForDebug;
 
   369 
   369 
   370 
   370 
   371         protected Band(String name, Coding regularCoding) {
 
   371         protected Band(String name, Coding regularCoding) {
 
   372             this.name = name;
 
   372             this.name = name;
 
   428             return computeOutputSize();
 
   428             return computeOutputSize();
 
   429         }
 
   429         }
 
   430 
   430 
   431         protected abstract long computeOutputSize();
 
   431         protected abstract long computeOutputSize();
 
   432 
   432 
   433         abstract protected void writeDataTo(OutputStream out) throws IOException;
 
   433         protected abstract void writeDataTo(OutputStream out) throws IOException;
 
   434 
   434 
   435         /** Expect a certain number of values. */
 
   435         /** Expect a certain number of values. */
 
   436         void expectLength(int l) {
 
   436         void expectLength(int l) {
 
   437             assert(assertPhase(this, EXPECT_PHASE));
 
   437             assert(assertPhase(this, EXPECT_PHASE));
 
   438             assert(valuesExpected == 0);  // all at once
 
   438             assert(valuesExpected == 0);  // all at once
 
   466             setPhase(READ_PHASE);
 
   466             setPhase(READ_PHASE);
 
   467             // subclasses continue by reading their contents from input:
 
   467             // subclasses continue by reading their contents from input:
 
   468             readDataFrom(in);
 
   468             readDataFrom(in);
 
   469             readyToDisburse();
 
   469             readyToDisburse();
 
   470         }
 
   470         }
 
   471         abstract protected void readDataFrom(InputStream in) throws IOException;
 
   471         protected abstract void readDataFrom(InputStream in) throws IOException;
 
   472         protected void readyToDisburse() {
 
   472         protected void readyToDisburse() {
 
   473             if (verbose > 1)  Utils.log.fine("readyToDisburse "+this);
 
   473             if (verbose > 1)  Utils.log.fine("readyToDisburse "+this);
 
   474             setPhase(DISBURSE_PHASE);
 
   474             setPhase(DISBURSE_PHASE);
 
   475         }
 
   475         }
 
   476         public void doneDisbursing() {
 
   476         public void doneDisbursing() {
 
  1445             assert(false); break;
 
  1445             assert(false); break;
 
  1446         }
 
  1446         }
 
  1447         return b;
 
  1447         return b;
 
  1448     }
 
  1448     }
 
  1449 
  1449 
  1450     static private final boolean NULL_IS_OK = true;
 
  1450     private static final boolean NULL_IS_OK = true;
 
  1451 
  1451 
  1452     MultiBand all_bands = (MultiBand) new MultiBand("(package)", UNSIGNED5).init();
 
  1452     MultiBand all_bands = (MultiBand) new MultiBand("(package)", UNSIGNED5).init();
 
  1453 
  1453 
  1454     // file header (various random bytes)
 
  1454     // file header (various random bytes)
 
  1455     ByteBand archive_magic = all_bands.newByteBand("archive_magic");
 
  1455     ByteBand archive_magic = all_bands.newByteBand("archive_magic");
 
  2537         else
 
  2537         else
 
  2538             Utils.log.warning("Unexpected phase "+p0+" -> "+p1);
 
  2538             Utils.log.warning("Unexpected phase "+p0+" -> "+p1);
 
  2539         return false;
 
  2539         return false;
 
  2540     }
 
  2540     }
 
  2541 
  2541 
  2542     static private boolean assertDoneDisbursing(Band b) {
 
  2542     private static boolean assertDoneDisbursing(Band b) {
 
  2543         if (b.phase != DISBURSE_PHASE) {
 
  2543         if (b.phase != DISBURSE_PHASE) {
 
  2544             Utils.log.warning("assertDoneDisbursing: still in phase "+b.phase+": "+b);
 
  2544             Utils.log.warning("assertDoneDisbursing: still in phase "+b.phase+": "+b);
 
  2545             if (verbose() <= 1)  return false;  // fail now
 
  2545             if (verbose() <= 1)  return false;  // fail now
 
  2546         }
 
  2546         }
 
  2547         int left = b.valuesRemainingForDebug();
 
  2547         int left = b.valuesRemainingForDebug();
 
  2560             }
 
  2560             }
 
  2561         }
 
  2561         }
 
  2562         return true;
 
  2562         return true;
 
  2563     }
 
  2563     }
 
  2564 
  2564 
  2565     static private void printCDecl(Band b) {
 
  2565     private static void printCDecl(Band b) {
 
  2566         if (b instanceof MultiBand) {
 
  2566         if (b instanceof MultiBand) {
 
  2567             MultiBand mb = (MultiBand) b;
 
  2567             MultiBand mb = (MultiBand) b;
 
  2568             for (int i = 0; i < mb.bandCount; i++) {
 
  2568             for (int i = 0; i < mb.bandCount; i++) {
 
  2569                 printCDecl(mb.bands[i]);
 
  2569                 printCDecl(mb.bands[i]);
 
  2570             }
 
  2570             }
jdk-sandbox