1 /*
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 /*
27 * Native method support for java.util.zip.Inflater
28 */
29
30 #include <stddef.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <errno.h>
34 #include <string.h>
35 #include "jlong.h"
36 #include "jni.h"
37 #include "jvm.h"
38 #include "jni_util.h"
39 #include <zlib.h>
40 #include "java_util_zip_Inflater.h"
41
42 #define ThrowDataFormatException(env, msg) \
43 JNU_ThrowByName(env, "java/util/zip/DataFormatException", msg)
44
45 static jfieldID needDictID;
46 static jfieldID finishedID;
47 static jfieldID bufID, offID, lenID;
48
49 JNIEXPORT void JNICALL
50 Java_java_util_zip_Inflater_initIDs(JNIEnv *env, jclass cls)
51 {
52 needDictID = (*env)->GetFieldID(env, cls, "needDict", "Z");
53 finishedID = (*env)->GetFieldID(env, cls, "finished", "Z");
54 bufID = (*env)->GetFieldID(env, cls, "buf", "[B");
55 offID = (*env)->GetFieldID(env, cls, "off", "I");
56 lenID = (*env)->GetFieldID(env, cls, "len", "I");
57 }
58
59 JNIEXPORT jlong JNICALL
60 Java_java_util_zip_Inflater_init(JNIEnv *env, jclass cls, jboolean nowrap)
61 {
62 z_stream *strm = calloc(1, sizeof(z_stream));
63
64 if (strm == NULL) {
65 JNU_ThrowOutOfMemoryError(env, 0);
66 return jlong_zero;
67 } else {
68 const char *msg;
69 int ret = inflateInit2(strm, nowrap ? -MAX_WBITS : MAX_WBITS);
70 switch (ret) {
71 case Z_OK:
72 return ptr_to_jlong(strm);
73 case Z_MEM_ERROR:
74 free(strm);
75 JNU_ThrowOutOfMemoryError(env, 0);
76 return jlong_zero;
77 default:
78 msg = ((strm->msg != NULL) ? strm->msg :
79 (ret == Z_VERSION_ERROR) ?
80 "zlib returned Z_VERSION_ERROR: "
81 "compile time and runtime zlib implementations differ" :
82 (ret == Z_STREAM_ERROR) ?
83 "inflateInit2 returned Z_STREAM_ERROR" :
84 "unknown error initializing zlib library");
85 free(strm);
86 JNU_ThrowInternalError(env, msg);
87 return jlong_zero;
88 }
89 }
90 }
91
92 JNIEXPORT void JNICALL
93 Java_java_util_zip_Inflater_setDictionary(JNIEnv *env, jclass cls, jlong addr,
94 jarray b, jint off, jint len)
95 {
96 Bytef *buf = (*env)->GetPrimitiveArrayCritical(env, b, 0);
97 int res;
98 if (buf == 0) /* out of memory */
99 return;
100 res = inflateSetDictionary(jlong_to_ptr(addr), buf + off, len);
101 (*env)->ReleasePrimitiveArrayCritical(env, b, buf, 0);
102 switch (res) {
103 case Z_OK:
104 break;
105 case Z_STREAM_ERROR:
106 case Z_DATA_ERROR:
107 JNU_ThrowIllegalArgumentException(env, ((z_stream *)jlong_to_ptr(addr))->msg);
108 break;
109 default:
110 JNU_ThrowInternalError(env, ((z_stream *)jlong_to_ptr(addr))->msg);
111 break;
112 }
113 }
114
115 JNIEXPORT jint JNICALL
116 Java_java_util_zip_Inflater_inflateBytes(JNIEnv *env, jobject this, jlong addr,
117 jarray b, jint off, jint len)
118 {
119 z_stream *strm = jlong_to_ptr(addr);
120 jarray this_buf = (jarray)(*env)->GetObjectField(env, this, bufID);
121 jint this_off = (*env)->GetIntField(env, this, offID);
122 jint this_len = (*env)->GetIntField(env, this, lenID);
123
124 jbyte *in_buf;
125 jbyte *out_buf;
126 int ret;
127
128 in_buf = (*env)->GetPrimitiveArrayCritical(env, this_buf, 0);
129 if (in_buf == NULL) {
130 if (this_len != 0)
131 JNU_ThrowOutOfMemoryError(env, 0);
132 return 0;
133 }
134 out_buf = (*env)->GetPrimitiveArrayCritical(env, b, 0);
135 if (out_buf == NULL) {
136 (*env)->ReleasePrimitiveArrayCritical(env, this_buf, in_buf, 0);
137 if (len != 0)
138 JNU_ThrowOutOfMemoryError(env, 0);
139 return 0;
140 }
141 strm->next_in = (Bytef *) (in_buf + this_off);
142 strm->next_out = (Bytef *) (out_buf + off);
143 strm->avail_in = this_len;
144 strm->avail_out = len;
145 ret = inflate(strm, Z_FINISH);
146 (*env)->ReleasePrimitiveArrayCritical(env, b, out_buf, 0);
147 (*env)->ReleasePrimitiveArrayCritical(env, this_buf, in_buf, 0);
148
149 switch (ret) {
150 case Z_STREAM_END:
151 (*env)->SetBooleanField(env, this, finishedID, JNI_TRUE);
152 /* fall through */
153 case Z_BUF_ERROR:
154 this_off += this_len - strm->avail_in;
155 (*env)->SetIntField(env, this, offID, this_off);
156 (*env)->SetIntField(env, this, lenID, strm->avail_in);
157 return len - strm->avail_out;
158 case Z_NEED_DICT:
159 (*env)->SetBooleanField(env, this, needDictID, JNI_TRUE);
160 /* Might have consumed some input here! */
161 this_off += this_len - strm->avail_in;
162 (*env)->SetIntField(env, this, offID, this_off);
163 (*env)->SetIntField(env, this, lenID, strm->avail_in);
164 return 0;
165 case Z_DATA_ERROR:
166 ThrowDataFormatException(env, strm->msg);
167 return 0;
168 case Z_MEM_ERROR:
169 JNU_ThrowOutOfMemoryError(env, 0);
170 return 0;
171 default:
172 JNU_ThrowInternalError(env, strm->msg);
173 return 0;
174 }
175 }
176
177 JNIEXPORT jint JNICALL
178 Java_java_util_zip_Inflater_getAdler(JNIEnv *env, jclass cls, jlong addr)
179 {
180 return ((z_stream *)jlong_to_ptr(addr))->adler;
181 }
182
183 JNIEXPORT void JNICALL
184 Java_java_util_zip_Inflater_reset(JNIEnv *env, jclass cls, jlong addr)
185 {
186 if (inflateReset(jlong_to_ptr(addr)) != Z_OK) {
187 JNU_ThrowInternalError(env, 0);
188 }
189 }
190
191 JNIEXPORT void JNICALL
192 Java_java_util_zip_Inflater_end(JNIEnv *env, jclass cls, jlong addr)
193 {
194 if (inflateEnd(jlong_to_ptr(addr)) == Z_STREAM_ERROR) {
195 JNU_ThrowInternalError(env, 0);
196 } else {
197 free(jlong_to_ptr(addr));
198 }
199 }