| /* |
| * Copyright (c) 1997, 2014, 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.Deflater |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include "jlong.h" |
| #include "jni.h" |
| #include "jni_util.h" |
| #include <zlib.h> |
| |
| #include "java_util_zip_Deflater.h" |
| |
| #define DEF_MEM_LEVEL 8 |
| |
| static jfieldID levelID; |
| static jfieldID strategyID; |
| static jfieldID setParamsID; |
| static jfieldID finishID; |
| static jfieldID finishedID; |
| static jfieldID bufID, offID, lenID; |
| |
| JNIEXPORT void JNICALL |
| Java_java_util_zip_Deflater_initIDs(JNIEnv *env, jclass cls) |
| { |
| levelID = (*env)->GetFieldID(env, cls, "level", "I"); |
| CHECK_NULL(levelID); |
| strategyID = (*env)->GetFieldID(env, cls, "strategy", "I"); |
| CHECK_NULL(strategyID); |
| setParamsID = (*env)->GetFieldID(env, cls, "setParams", "Z"); |
| CHECK_NULL(setParamsID); |
| finishID = (*env)->GetFieldID(env, cls, "finish", "Z"); |
| CHECK_NULL(finishID); |
| finishedID = (*env)->GetFieldID(env, cls, "finished", "Z"); |
| CHECK_NULL(finishedID); |
| bufID = (*env)->GetFieldID(env, cls, "buf", "[B"); |
| CHECK_NULL(bufID); |
| offID = (*env)->GetFieldID(env, cls, "off", "I"); |
| CHECK_NULL(offID); |
| lenID = (*env)->GetFieldID(env, cls, "len", "I"); |
| CHECK_NULL(lenID); |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_java_util_zip_Deflater_init(JNIEnv *env, jclass cls, jint level, |
| jint strategy, jboolean nowrap) |
| { |
| z_stream *strm = calloc(1, sizeof(z_stream)); |
| |
| if (strm == 0) { |
| JNU_ThrowOutOfMemoryError(env, 0); |
| return jlong_zero; |
| } else { |
| const char *msg; |
| int ret = deflateInit2(strm, level, Z_DEFLATED, |
| nowrap ? -MAX_WBITS : MAX_WBITS, |
| DEF_MEM_LEVEL, strategy); |
| switch (ret) { |
| case Z_OK: |
| return ptr_to_jlong(strm); |
| case Z_MEM_ERROR: |
| free(strm); |
| JNU_ThrowOutOfMemoryError(env, 0); |
| return jlong_zero; |
| case Z_STREAM_ERROR: |
| free(strm); |
| JNU_ThrowIllegalArgumentException(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" : |
| "unknown error initializing zlib library"); |
| free(strm); |
| JNU_ThrowInternalError(env, msg); |
| return jlong_zero; |
| } |
| } |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_java_util_zip_Deflater_setDictionary(JNIEnv *env, jclass cls, jlong addr, |
| jarray b, jint off, jint len) |
| { |
| Bytef *buf = (*env)->GetPrimitiveArrayCritical(env, b, 0); |
| int res; |
| if (buf == 0) {/* out of memory */ |
| return; |
| } |
| res = deflateSetDictionary((z_stream *)jlong_to_ptr(addr), buf + off, len); |
| (*env)->ReleasePrimitiveArrayCritical(env, b, buf, 0); |
| switch (res) { |
| case Z_OK: |
| break; |
| case Z_STREAM_ERROR: |
| JNU_ThrowIllegalArgumentException(env, 0); |
| break; |
| default: |
| JNU_ThrowInternalError(env, ((z_stream *)jlong_to_ptr(addr))->msg); |
| break; |
| } |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_java_util_zip_Deflater_deflateBytes(JNIEnv *env, jobject this, jlong addr, |
| jarray b, jint off, jint len, jint flush) |
| { |
| z_stream *strm = jlong_to_ptr(addr); |
| |
| jarray this_buf = (*env)->GetObjectField(env, this, bufID); |
| jint this_off = (*env)->GetIntField(env, this, offID); |
| jint this_len = (*env)->GetIntField(env, this, lenID); |
| jbyte *in_buf; |
| jbyte *out_buf; |
| int res; |
| if ((*env)->GetBooleanField(env, this, setParamsID)) { |
| int level = (*env)->GetIntField(env, this, levelID); |
| int strategy = (*env)->GetIntField(env, this, strategyID); |
| in_buf = (*env)->GetPrimitiveArrayCritical(env, this_buf, 0); |
| if (in_buf == NULL) { |
| // Throw OOME only when length is not zero |
| if (this_len != 0 && (*env)->ExceptionOccurred(env) == NULL) |
| JNU_ThrowOutOfMemoryError(env, 0); |
| return 0; |
| } |
| out_buf = (*env)->GetPrimitiveArrayCritical(env, b, 0); |
| if (out_buf == NULL) { |
| (*env)->ReleasePrimitiveArrayCritical(env, this_buf, in_buf, 0); |
| if (len != 0 && (*env)->ExceptionOccurred(env) == NULL) |
| JNU_ThrowOutOfMemoryError(env, 0); |
| return 0; |
| } |
| |
| strm->next_in = (Bytef *) (in_buf + this_off); |
| strm->next_out = (Bytef *) (out_buf + off); |
| strm->avail_in = this_len; |
| strm->avail_out = len; |
| res = deflateParams(strm, level, strategy); |
| (*env)->ReleasePrimitiveArrayCritical(env, b, out_buf, 0); |
| (*env)->ReleasePrimitiveArrayCritical(env, this_buf, in_buf, 0); |
| |
| switch (res) { |
| case Z_OK: |
| (*env)->SetBooleanField(env, this, setParamsID, JNI_FALSE); |
| this_off += this_len - strm->avail_in; |
| (*env)->SetIntField(env, this, offID, this_off); |
| (*env)->SetIntField(env, this, lenID, strm->avail_in); |
| return (jint) (len - strm->avail_out); |
| case Z_BUF_ERROR: |
| (*env)->SetBooleanField(env, this, setParamsID, JNI_FALSE); |
| return 0; |
| default: |
| JNU_ThrowInternalError(env, strm->msg); |
| return 0; |
| } |
| } else { |
| jboolean finish = (*env)->GetBooleanField(env, this, finishID); |
| in_buf = (*env)->GetPrimitiveArrayCritical(env, this_buf, 0); |
| if (in_buf == NULL) { |
| if (this_len != 0) |
| JNU_ThrowOutOfMemoryError(env, 0); |
| return 0; |
| } |
| out_buf = (*env)->GetPrimitiveArrayCritical(env, b, 0); |
| if (out_buf == NULL) { |
| (*env)->ReleasePrimitiveArrayCritical(env, this_buf, in_buf, 0); |
| if (len != 0) |
| JNU_ThrowOutOfMemoryError(env, 0); |
| |
| return 0; |
| } |
| |
| strm->next_in = (Bytef *) (in_buf + this_off); |
| strm->next_out = (Bytef *) (out_buf + off); |
| strm->avail_in = this_len; |
| strm->avail_out = len; |
| res = deflate(strm, finish ? Z_FINISH : flush); |
| (*env)->ReleasePrimitiveArrayCritical(env, b, out_buf, 0); |
| (*env)->ReleasePrimitiveArrayCritical(env, this_buf, in_buf, 0); |
| |
| switch (res) { |
| case Z_STREAM_END: |
| (*env)->SetBooleanField(env, this, finishedID, JNI_TRUE); |
| /* fall through */ |
| case Z_OK: |
| this_off += this_len - strm->avail_in; |
| (*env)->SetIntField(env, this, offID, this_off); |
| (*env)->SetIntField(env, this, lenID, strm->avail_in); |
| return len - strm->avail_out; |
| case Z_BUF_ERROR: |
| return 0; |
| default: |
| JNU_ThrowInternalError(env, strm->msg); |
| return 0; |
| } |
| } |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_java_util_zip_Deflater_getAdler(JNIEnv *env, jclass cls, jlong addr) |
| { |
| return ((z_stream *)jlong_to_ptr(addr))->adler; |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_java_util_zip_Deflater_reset(JNIEnv *env, jclass cls, jlong addr) |
| { |
| if (deflateReset((z_stream *)jlong_to_ptr(addr)) != Z_OK) { |
| JNU_ThrowInternalError(env, 0); |
| } |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_java_util_zip_Deflater_end(JNIEnv *env, jclass cls, jlong addr) |
| { |
| if (deflateEnd((z_stream *)jlong_to_ptr(addr)) == Z_STREAM_ERROR) { |
| JNU_ThrowInternalError(env, 0); |
| } else { |
| free((z_stream *)jlong_to_ptr(addr)); |
| } |
| } |