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| 1 | +/* |
| 2 | + * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved. |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | + * |
| 5 | + * The Universal Permissive License (UPL), Version 1.0 |
| 6 | + * |
| 7 | + * Subject to the condition set forth below, permission is hereby granted to any |
| 8 | + * person obtaining a copy of this software, associated documentation and/or |
| 9 | + * data (collectively the "Software"), free of charge and under any and all |
| 10 | + * copyright rights in the Software, and any and all patent rights owned or |
| 11 | + * freely licensable by each licensor hereunder covering either (i) the |
| 12 | + * unmodified Software as contributed to or provided by such licensor, or (ii) |
| 13 | + * the Larger Works (as defined below), to deal in both |
| 14 | + * |
| 15 | + * (a) the Software, and |
| 16 | + * |
| 17 | + * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if |
| 18 | + * one is included with the Software each a "Larger Work" to which the Software |
| 19 | + * is contributed by such licensors), |
| 20 | + * |
| 21 | + * without restriction, including without limitation the rights to copy, create |
| 22 | + * derivative works of, display, perform, and distribute the Software and make, |
| 23 | + * use, sell, offer for sale, import, export, have made, and have sold the |
| 24 | + * Software and the Larger Work(s), and to sublicense the foregoing rights on |
| 25 | + * either these or other terms. |
| 26 | + * |
| 27 | + * This license is subject to the following condition: |
| 28 | + * |
| 29 | + * The above copyright notice and either this complete permission notice or at a |
| 30 | + * minimum a reference to the UPL must be included in all copies or substantial |
| 31 | + * portions of the Software. |
| 32 | + * |
| 33 | + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 34 | + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 35 | + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 36 | + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 37 | + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 38 | + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 39 | + * SOFTWARE. |
| 40 | + */ |
| 41 | +package com.oracle.graal.python.builtins.modules.zlib; |
| 42 | + |
| 43 | +import com.oracle.graal.python.builtins.modules.zlib.ZLibCompObject.JavaZlibCompObject; |
| 44 | +import com.oracle.graal.python.builtins.modules.zlib.ZLibCompObject.NativeZlibCompObject; |
| 45 | +import com.oracle.graal.python.builtins.objects.bytes.PBytes; |
| 46 | +import com.oracle.graal.python.builtins.objects.object.PythonBuiltinObject; |
| 47 | +import com.oracle.graal.python.runtime.NFIZlibSupport; |
| 48 | +import com.oracle.truffle.api.object.Shape; |
| 49 | + |
| 50 | +public class ZlibDecompressorObject extends PythonBuiltinObject { |
| 51 | + |
| 52 | + private final ZLibCompObject compObject; // mq: we are reusing ZLibCompObject to reduce code |
| 53 | + // footprint. |
| 54 | + |
| 55 | + /* |
| 56 | + * zst>avail_in is only 32 bit, so we store the true length separately. Conversion and looping |
| 57 | + * is encapsulated in decompress_buf() |
| 58 | + */ |
| 59 | + private long availInReal; |
| 60 | + private boolean needsInput; |
| 61 | + |
| 62 | + // native |
| 63 | + private ZlibDecompressorObject(Object cls, Shape instanceShape, Object zst, NFIZlibSupport zlibSupport) { |
| 64 | + super(cls, instanceShape); |
| 65 | + this.compObject = ZLibCompObject.createNative(cls, instanceShape, zst, zlibSupport); |
| 66 | + this.availInReal = 0; |
| 67 | + } |
| 68 | + |
| 69 | + // Java |
| 70 | + private ZlibDecompressorObject(Object cls, Shape instanceShape, Object stream, int wbits, byte[] zdict) { |
| 71 | + super(cls, instanceShape); |
| 72 | + this.compObject = ZLibCompObject.createJava(cls, instanceShape, stream, wbits, zdict); |
| 73 | + this.availInReal = 0; |
| 74 | + } |
| 75 | + |
| 76 | + public boolean isInitialized() { |
| 77 | + return compObject.isInitialized(); |
| 78 | + } |
| 79 | + |
| 80 | + public boolean isEof() { |
| 81 | + return compObject.isEof(); |
| 82 | + } |
| 83 | + |
| 84 | + public void setEof(boolean eof) { |
| 85 | + compObject.setEof(eof); |
| 86 | + } |
| 87 | + |
| 88 | + public Object getZst() { |
| 89 | + assert isNative(); |
| 90 | + return ((NativeZlibCompObject) compObject).getZst(); |
| 91 | + } |
| 92 | + |
| 93 | + public JavaZlibCompObject getStream() { |
| 94 | + assert !isNative(); |
| 95 | + return ((JavaZlibCompObject) compObject); |
| 96 | + } |
| 97 | + |
| 98 | + public long getAvailInReal() { |
| 99 | + return availInReal; |
| 100 | + } |
| 101 | + |
| 102 | + public void setAvailInReal(long avail_in_real) { |
| 103 | + this.availInReal = avail_in_real; |
| 104 | + } |
| 105 | + |
| 106 | + public boolean isNeedsInput() { |
| 107 | + return needsInput; |
| 108 | + } |
| 109 | + |
| 110 | + public void setNeedsInput(boolean needs_input) { |
| 111 | + this.needsInput = needs_input; |
| 112 | + } |
| 113 | + |
| 114 | + public PBytes getUnusedData() { |
| 115 | + return compObject.getUnusedData(); |
| 116 | + } |
| 117 | + |
| 118 | + public void setUnusedData(PBytes unusedData) { |
| 119 | + compObject.setUnusedData(unusedData); |
| 120 | + } |
| 121 | + |
| 122 | + public PBytes getUnconsumedTail() { |
| 123 | + return compObject.getUnconsumedTail(); |
| 124 | + } |
| 125 | + |
| 126 | + public void setUnconsumedTail(PBytes unconsumedTail) { |
| 127 | + compObject.setUnconsumedTail(unconsumedTail); |
| 128 | + } |
| 129 | + |
| 130 | + public boolean isNative() { |
| 131 | + return compObject instanceof ZLibCompObject.NativeZlibCompObject; |
| 132 | + } |
| 133 | + |
| 134 | + public static ZlibDecompressorObject createNative(Object cls, Shape instanceShape, Object zst, NFIZlibSupport zlibSupport) { |
| 135 | + return new ZlibDecompressorObject(cls, instanceShape, zst, zlibSupport); |
| 136 | + } |
| 137 | + |
| 138 | + public static ZlibDecompressorObject createJava(Object cls, Shape instanceShape, Object stream, int wbits, byte[] zdict) { |
| 139 | + return new ZlibDecompressorObject(cls, instanceShape, stream, wbits, zdict); |
| 140 | + } |
| 141 | +} |
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