mirror of
https://github.com/geometer/FBReaderJ.git
synced 2025-10-03 17:59:33 +02:00
83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
/*
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* Copyright (C) 2009-2013 Geometer Plus <contact@geometerplus.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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#include <jni.h>
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#include <string.h>
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#include <zlib.h>
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#include <new>
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#define SIZE 10
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static z_stream* ourStreams[SIZE] = { 0 };
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extern "C"
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jint Java_org_amse_ys_zip_DeflatingDecompressor_startInflating(JNIEnv *env, jobject thiz) {
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int i;
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for (i = 0; i < SIZE; ++i) {
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if (ourStreams[i] == 0) {
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ourStreams[i] = new z_stream;
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memset(ourStreams[i], 0, sizeof(z_stream));
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inflateInit2(ourStreams[i], -MAX_WBITS);
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return i;
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}
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}
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return -1;
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}
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extern "C"
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void Java_org_amse_ys_zip_DeflatingDecompressor_endInflating(JNIEnv *env, jobject thiz, jint inflatorId) {
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if (inflatorId >= 0 && inflatorId < SIZE) {
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inflateEnd(ourStreams[inflatorId]);
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delete ourStreams[inflatorId];
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ourStreams[inflatorId] = 0;
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}
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}
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// returns (endFlag << 32) + ((used inLength) << 16) + outLength
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extern "C"
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jlong Java_org_amse_ys_zip_DeflatingDecompressor_inflate(JNIEnv *env, jobject thiz, jint inflatorId, jbyteArray in, jint inOffset, jint inLength, jbyteArray out) {
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if (inflatorId < 0 || inflatorId >= SIZE) {
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return -1;
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}
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z_stream *stream = ourStreams[inflatorId];
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if (stream == 0) {
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return -2;
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}
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jbyte* inStart = env->GetByteArrayElements(in, 0);
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jbyte* outStart = env->GetByteArrayElements(out, 0);
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stream->next_in = (Bytef*)inStart + inOffset;
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stream->avail_in = inLength;
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stream->next_out = (Bytef*)outStart;
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const int outLength = env->GetArrayLength(out);
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stream->avail_out = outLength;
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const int code = inflate(stream, Z_SYNC_FLUSH);
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env->ReleaseByteArrayElements(in, inStart, 0);
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env->ReleaseByteArrayElements(out, outStart, 0);
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if (code == Z_OK || code == Z_STREAM_END) {
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jlong result = ((inLength - stream->avail_in) << 16) + outLength - stream->avail_out;
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if (code == Z_STREAM_END) {
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result |= ((jlong)1) << 32;
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}
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return result;
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}
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return -1024 + code;
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}
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