Ziele Untersuchung
mit Columbo Integrität von
Datenbanken Interaktion und
Portierbarkeit Ergonomie der
Schnittstellen

Angebot Produkte Projekt Beratung

Mittel Analytik Modellierung Sprachen Algebra Logik Hardware Denken Kreativität

Zusammenhänge Gesellschaft Wirtschaft Branche Firma


products/sources/formale Sprachen/Java/Openjdk/src/java.base/share/native/libzip/ (Sun/Oracle ^©) Datei vom 13.11.2022 mit Größe 10 kB

Quelle Inflater.c Sprache: C

/*
* Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.  Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

/*
* Native method support for java.util.zip.Inflater
*/

#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include "jlong.h"
#include "jni.h"
#include "jvm.h"
#include "jni_util.h"
#include <zlib.h>
#include "java_util_zip_Inflater.h"

#define ThrowDataFormatException(env, msg) \
        JNU_ThrowByName(env, "java/util/zip/DataFormatException", msg)

static jfieldID inputConsumedID;
static jfieldID outputConsumedID;

JNIEXPORT void JNICALL
Java_java_util_zip_Inflater_initIDs(JNIEnv *env, jclass cls)
{
    inputConsumedID = (*env)->GetFieldID(env, cls, "inputConsumed", "I");
    outputConsumedID = (*env)->GetFieldID(env, cls, "outputConsumed", "I");
    CHECK_NULL(inputConsumedID);
    CHECK_NULL(outputConsumedID);
}

JNIEXPORT jlong JNICALL
Java_java_util_zip_Inflater_init(JNIEnv *env, jclass cls, jboolean nowrap)
{
    z_stream *strm = calloc(1, sizeof(z_stream));

    if (strm == NULL) {
        JNU_ThrowOutOfMemoryError(env, 0);
        return jlong_zero;
    } else {
        const char *msg;
        int ret = inflateInit2(strm, nowrap ? -MAX_WBITS : MAX_WBITS);
        switch (ret) {
          case Z_OK:
            return ptr_to_jlong(strm);
          case Z_MEM_ERROR:
            free(strm);
            JNU_ThrowOutOfMemoryError(env, 0);
            return jlong_zero;
          default:
            msg = ((strm->msg != NULL) ? strm->msg :
                   (ret == Z_VERSION_ERROR) ?
                   "zlib returned Z_VERSION_ERROR: "
                   "compile time and runtime zlib implementations differ" :
                   (ret == Z_STREAM_ERROR) ?
                   "inflateInit2 returned Z_STREAM_ERROR" :
                   "unknown error initializing zlib library");
            free(strm);
            JNU_ThrowInternalError(env, msg);
            return jlong_zero;
        }
    }
}

static void checkSetDictionaryResult(JNIEnv *env, jlong addr, int res)
{
    switch (res) {
    case Z_OK:
        break;
    case Z_STREAM_ERROR:
    case Z_DATA_ERROR:
        JNU_ThrowIllegalArgumentException(env, ((z_stream *)jlong_to_ptr(addr))->msg);
        break;
    default:
        JNU_ThrowInternalError(env, ((z_stream *)jlong_to_ptr(addr))->msg);
        break;
    }
}

JNIEXPORT void JNICALL
Java_java_util_zip_Inflater_setDictionary(JNIEnv *env, jclass cls, jlong addr,
                                          jbyteArray b, jint off, jint len)
{
    jint res;
    Bytef *buf = (*env)->GetPrimitiveArrayCritical(env, b, 0);
    if (buf == NULL) /* out of memory */
        return;
    res = inflateSetDictionary(jlong_to_ptr(addr), buf + off, len);
    (*env)->ReleasePrimitiveArrayCritical(env, b, buf, 0);
    checkSetDictionaryResult(env, addr, res);
}

JNIEXPORT void JNICALL
Java_java_util_zip_Inflater_setDictionaryBuffer(JNIEnv *env, jclass cls, jlong addr,
                                          jlong bufferAddr, jint len)
{
    jint res;
    Bytef *buf = jlong_to_ptr(bufferAddr);
    res = inflateSetDictionary(jlong_to_ptr(addr), buf, len);
    checkSetDictionaryResult(env, addr, res);
}

static jint doInflate(jlong addr,
                       jbyte *input, jint inputLen,
                       jbyte *output, jint outputLen)
{
    jint ret;
    z_stream *strm = jlong_to_ptr(addr);

    strm->next_in  = (Bytef *) input;
    strm->next_out = (Bytef *) output;
    strm->avail_in  = inputLen;
    strm->avail_out = outputLen;

    ret = inflate(strm, Z_PARTIAL_FLUSH);
    return ret;
}

static jlong checkInflateStatus(JNIEnv *env, jobject this, jlong addr,
                        jint inputLen, jint outputLen, jint ret )
{
    z_stream *strm = jlong_to_ptr(addr);
    jint inputUsed = 0, outputUsed = 0;
    int finished = 0;
    int needDict = 0;

    switch (ret) {
    case Z_STREAM_END:
        finished = 1;
        /* fall through */
    case Z_OK:
        inputUsed = inputLen - strm->avail_in;
        outputUsed = outputLen - strm->avail_out;
        break;
    case Z_NEED_DICT:
        needDict = 1;
        /* Might have consumed some input here! */
        inputUsed = inputLen - strm->avail_in;
        /* zlib is unclear about whether output may be produced */
        outputUsed = outputLen - strm->avail_out;
        break;
    case Z_BUF_ERROR:
        break;
    case Z_DATA_ERROR:
        inputUsed = inputLen - strm->avail_in;
        (*env)->SetIntField(env, this, inputConsumedID, inputUsed);
        outputUsed = outputLen - strm->avail_out;
        (*env)->SetIntField(env, this, outputConsumedID, outputUsed);
        ThrowDataFormatException(env, strm->msg);
        break;
    case Z_MEM_ERROR:
        JNU_ThrowOutOfMemoryError(env, 0);
        break;
    default:
        JNU_ThrowInternalError(env, strm->msg);
        break;
    }
    return ((jlong)inputUsed) | (((jlong)outputUsed) << 31) | (((jlong)finished) << 62) | (((jlong)needDict) << 63);
}

JNIEXPORT jlong JNICALL
Java_java_util_zip_Inflater_inflateBytesBytes(JNIEnv *env, jobject this, jlong addr,
                                         jbyteArray inputArray, jint inputOff, jint inputLen,
                                         jbyteArray outputArray, jint outputOff, jint outputLen)
{
    jbyte *input = (*env)->GetPrimitiveArrayCritical(env, inputArray, 0);
    jbyte *output;
    jint ret;
    jlong retVal;

    if (input == NULL) {
        if (inputLen != 0 && (*env)->ExceptionOccurred(env) == NULL)
            JNU_ThrowOutOfMemoryError(env, 0);
        return 0L;
    }
    output = (*env)->GetPrimitiveArrayCritical(env, outputArray, 0);
    if (output == NULL) {
        (*env)->ReleasePrimitiveArrayCritical(env, inputArray, input, 0);
        if (outputLen != 0 && (*env)->ExceptionOccurred(env) == NULL)
            JNU_ThrowOutOfMemoryError(env, 0);
        return 0L;
    }

    ret = doInflate(addr, input + inputOff, inputLen, output + outputOff,
                    outputLen);

    (*env)->ReleasePrimitiveArrayCritical(env, outputArray, output, 0);
    (*env)->ReleasePrimitiveArrayCritical(env, inputArray, input, 0);

    retVal = checkInflateStatus(env, this, addr, inputLen, outputLen, ret );
    return retVal;
}

JNIEXPORT jlong JNICALL
Java_java_util_zip_Inflater_inflateBytesBuffer(JNIEnv *env, jobject this, jlong addr,
                                         jbyteArray inputArray, jint inputOff, jint inputLen,
                                         jlong outputBuffer, jint outputLen)
{
    jbyte *input = (*env)->GetPrimitiveArrayCritical(env, inputArray, 0);
    jbyte *output;
    jint ret;
    jlong retVal;

    if (input == NULL) {
        if (inputLen != 0 && (*env)->ExceptionOccurred(env) == NULL)
            JNU_ThrowOutOfMemoryError(env, 0);
        return 0L;
    }
    output = jlong_to_ptr(outputBuffer);

    ret = doInflate(addr, input + inputOff, inputLen, output, outputLen);

    (*env)->ReleasePrimitiveArrayCritical(env, inputArray, input, 0);
    retVal = checkInflateStatus(env, this, addr, inputLen, outputLen, ret );

    return retVal;
}

JNIEXPORT jlong JNICALL
Java_java_util_zip_Inflater_inflateBufferBytes(JNIEnv *env, jobject this, jlong addr,
                                         jlong inputBuffer, jint inputLen,
                                         jbyteArray outputArray, jint outputOff, jint outputLen)
{
    jbyte *input = jlong_to_ptr(inputBuffer);
    jbyte *output = (*env)->GetPrimitiveArrayCritical(env, outputArray, 0);
    jint ret;
    jlong retVal;

    if (output == NULL) {
        if (outputLen != 0 && (*env)->ExceptionOccurred(env) == NULL)
            JNU_ThrowOutOfMemoryError(env, 0);
        return 0L;
    }

    ret = doInflate(addr, input, inputLen, output  + outputOff, outputLen);

    (*env)->ReleasePrimitiveArrayCritical(env, outputArray, output, 0);
    retVal = checkInflateStatus(env, this, addr, inputLen, outputLen, ret );

    return retVal;
}

JNIEXPORT jlong JNICALL
Java_java_util_zip_Inflater_inflateBufferBuffer(JNIEnv *env, jobject this, jlong addr,
                                         jlong inputBuffer, jint inputLen,
                                         jlong outputBuffer, jint outputLen)
{
    jbyte *input = jlong_to_ptr(inputBuffer);
    jbyte *output = jlong_to_ptr(outputBuffer);
    jint ret;
    jlong retVal;

    ret = doInflate(addr, input, inputLen, output, outputLen);
    retVal = checkInflateStatus(env, this, addr, inputLen, outputLen, ret);
    return retVal;
}

JNIEXPORT jint JNICALL
Java_java_util_zip_Inflater_getAdler(JNIEnv *env, jclass cls, jlong addr)
{
    return ((z_stream *)jlong_to_ptr(addr))->adler;
}

JNIEXPORT void JNICALL
Java_java_util_zip_Inflater_reset(JNIEnv *env, jclass cls, jlong addr)
{
    if (inflateReset(jlong_to_ptr(addr)) != Z_OK) {
        JNU_ThrowInternalError(env, 0);
    }
}

JNIEXPORT void JNICALL
Java_java_util_zip_Inflater_end(JNIEnv *env, jclass cls, jlong addr)
{
    if (inflateEnd(jlong_to_ptr(addr)) == Z_STREAM_ERROR) {
        JNU_ThrowInternalError(env, 0);
    } else {
        free(jlong_to_ptr(addr));
    }
}

quality91%

¤ Dauer der Verarbeitung: 0.14 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.