blob: 5c199fca143e92a945721c125ae094b96e060672 [file] [log] [blame]
/*
* Copyright (c) 1997, 2009, 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 <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 needDictID;
static jfieldID finishedID;
static jfieldID bufID, offID, lenID;
JNIEXPORT void JNICALL
Java_java_util_zip_Inflater_initIDs(JNIEnv *env, jclass cls)
{
needDictID = (*env)->GetFieldID(env, cls, "needDict", "Z");
finishedID = (*env)->GetFieldID(env, cls, "finished", "Z");
bufID = (*env)->GetFieldID(env, cls, "buf", "[B");
offID = (*env)->GetFieldID(env, cls, "off", "I");
lenID = (*env)->GetFieldID(env, cls, "len", "I");
}
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 == 0) {
JNU_ThrowOutOfMemoryError(env, 0);
return jlong_zero;
} else {
char *msg;
switch (inflateInit2(strm, nowrap ? -MAX_WBITS : MAX_WBITS)) {
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;
free(strm);
JNU_ThrowInternalError(env, msg);
return jlong_zero;
}
}
}
JNIEXPORT void JNICALL
Java_java_util_zip_Inflater_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 = inflateSetDictionary(jlong_to_ptr(addr), buf + off, len);
(*env)->ReleasePrimitiveArrayCritical(env, b, buf, 0);
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 jint JNICALL
Java_java_util_zip_Inflater_inflateBytes(JNIEnv *env, jobject this, jlong addr,
jarray b, jint off, jint len)
{
z_stream *strm = jlong_to_ptr(addr);
jarray this_buf = (jarray)(*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 ret;
in_buf = (jbyte *) malloc(this_len);
if (in_buf == 0) {
JNU_ThrowOutOfMemoryError(env, 0);
return 0;
}
(*env)->GetByteArrayRegion(env, this_buf, this_off, this_len, in_buf);
out_buf = (jbyte *) malloc(len);
if (out_buf == 0) {
free(in_buf);
JNU_ThrowOutOfMemoryError(env, 0);
return 0;
}
strm->next_in = (Bytef *) in_buf;
strm->next_out = (Bytef *) out_buf;
strm->avail_in = this_len;
strm->avail_out = len;
ret = inflate(strm, Z_PARTIAL_FLUSH);
if (ret == Z_STREAM_END || ret == Z_OK) {
(*env)->SetByteArrayRegion(env, b, off, len - strm->avail_out, out_buf);
}
free(out_buf);
free(in_buf);
switch (ret) {
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_NEED_DICT:
(*env)->SetBooleanField(env, this, needDictID, JNI_TRUE);
/* Might have consumed some input here! */
this_off += this_len - strm->avail_in;
(*env)->SetIntField(env, this, offID, this_off);
(*env)->SetIntField(env, this, lenID, strm->avail_in);
return 0;
case Z_BUF_ERROR:
return 0;
case Z_DATA_ERROR:
ThrowDataFormatException(env, strm->msg);
return 0;
case Z_MEM_ERROR:
JNU_ThrowOutOfMemoryError(env, 0);
return 0;
default:
JNU_ThrowInternalError(env, strm->msg);
return 0;
}
}
JNIEXPORT jint JNICALL
Java_java_util_zip_Inflater_getAdler(JNIEnv *env, jclass cls, jlong addr)
{
return ((z_stream *)jlong_to_ptr(addr))->adler;
}
JNIEXPORT jlong JNICALL
Java_java_util_zip_Inflater_getBytesRead(JNIEnv *env, jclass cls, jlong addr)
{
return ((z_stream *)jlong_to_ptr(addr))->total_in;
}
JNIEXPORT jlong JNICALL
Java_java_util_zip_Inflater_getBytesWritten(JNIEnv *env, jclass cls, jlong addr)
{
return ((z_stream *)jlong_to_ptr(addr))->total_out;
}
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));
}
}