1 /* 2 * Copyright (c) 1997, 2012, 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.Deflater 28 */ 29 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include "jlong.h" 33 #include "jni.h" 34 #include "jni_util.h" 35 #include <zlib.h> 36 37 #include "java_util_zip_Deflater.h" 38 39 #define DEF_MEM_LEVEL 8 40 41 static jfieldID levelID; 42 static jfieldID strategyID; 43 static jfieldID setParamsID; 44 static jfieldID finishID; 45 static jfieldID finishedID; 46 static jfieldID bufID, offID, lenID; 47 48 JNIEXPORT void JNICALL 49 Java_java_util_zip_Deflater_initIDs(JNIEnv *env, jclass cls) 50 { 51 levelID = (*env)->GetFieldID(env, cls, "level", "I"); 52 strategyID = (*env)->GetFieldID(env, cls, "strategy", "I"); 53 setParamsID = (*env)->GetFieldID(env, cls, "setParams", "Z"); 54 finishID = (*env)->GetFieldID(env, cls, "finish", "Z"); 55 finishedID = (*env)->GetFieldID(env, cls, "finished", "Z"); 56 bufID = (*env)->GetFieldID(env, cls, "buf", "[B"); 57 offID = (*env)->GetFieldID(env, cls, "off", "I"); 58 lenID = (*env)->GetFieldID(env, cls, "len", "I"); 59 } 60 61 JNIEXPORT jlong JNICALL 62 Java_java_util_zip_Deflater_init(JNIEnv *env, jclass cls, jint level, 63 jint strategy, jboolean nowrap) 64 { 65 z_stream *strm = calloc(1, sizeof(z_stream)); 66 67 if (strm == 0) { 68 JNU_ThrowOutOfMemoryError(env, 0); 69 return jlong_zero; 70 } else { 71 char *msg; 72 switch (deflateInit2(strm, level, Z_DEFLATED, 73 nowrap ? -MAX_WBITS : MAX_WBITS, 74 DEF_MEM_LEVEL, strategy)) { 75 case Z_OK: 76 return ptr_to_jlong(strm); 77 case Z_MEM_ERROR: 78 free(strm); 79 JNU_ThrowOutOfMemoryError(env, 0); 80 return jlong_zero; 81 case Z_STREAM_ERROR: 82 free(strm); 83 JNU_ThrowIllegalArgumentException(env, 0); 84 return jlong_zero; 85 default: 86 msg = strm->msg; 87 free(strm); 88 JNU_ThrowInternalError(env, msg); 89 return jlong_zero; 90 } 91 } 92 } 93 94 JNIEXPORT void JNICALL 95 Java_java_util_zip_Deflater_setDictionary(JNIEnv *env, jclass cls, jlong addr, 96 jarray b, jint off, jint len) 97 { 98 Bytef *buf = (*env)->GetPrimitiveArrayCritical(env, b, 0); 99 int res; 100 if (buf == 0) {/* out of memory */ 101 return; 102 } 103 res = deflateSetDictionary((z_stream *)jlong_to_ptr(addr), buf + off, len); 104 (*env)->ReleasePrimitiveArrayCritical(env, b, buf, 0); 105 switch (res) { 106 case Z_OK: 107 break; 108 case Z_STREAM_ERROR: 109 JNU_ThrowIllegalArgumentException(env, 0); 110 break; 111 default: 112 JNU_ThrowInternalError(env, ((z_stream *)jlong_to_ptr(addr))->msg); 113 break; 114 } 115 } 116 117 JNIEXPORT jint JNICALL 118 Java_java_util_zip_Deflater_deflateBytes(JNIEnv *env, jobject this, jlong addr, 119 jarray b, jint off, jint len, jint flush) 120 { 121 z_stream *strm = jlong_to_ptr(addr); 122 123 jarray this_buf = (*env)->GetObjectField(env, this, bufID); 124 jint this_off = (*env)->GetIntField(env, this, offID); 125 jint this_len = (*env)->GetIntField(env, this, lenID); 126 jbyte *in_buf; 127 jbyte *out_buf; 128 int res; 129 if ((*env)->GetBooleanField(env, this, setParamsID)) { 130 int level = (*env)->GetIntField(env, this, levelID); 131 int strategy = (*env)->GetIntField(env, this, strategyID); 132 in_buf = (*env)->GetPrimitiveArrayCritical(env, this_buf, 0); 133 if (in_buf == NULL) { 134 // Throw OOME only when length is not zero 135 if (this_len != 0) 136 JNU_ThrowOutOfMemoryError(env, 0); 137 return 0; 138 } 139 out_buf = (*env)->GetPrimitiveArrayCritical(env, b, 0); 140 if (out_buf == NULL) { 141 (*env)->ReleasePrimitiveArrayCritical(env, this_buf, in_buf, 0); 142 if (len != 0) 143 JNU_ThrowOutOfMemoryError(env, 0); 144 return 0; 145 } 146 147 strm->next_in = (Bytef *) (in_buf + this_off); 148 strm->next_out = (Bytef *) (out_buf + off); 149 strm->avail_in = this_len; 150 strm->avail_out = len; 151 res = deflateParams(strm, level, strategy); 152 (*env)->ReleasePrimitiveArrayCritical(env, b, out_buf, 0); 153 (*env)->ReleasePrimitiveArrayCritical(env, this_buf, in_buf, 0); 154 155 switch (res) { 156 case Z_OK: 157 (*env)->SetBooleanField(env, this, setParamsID, JNI_FALSE); 158 this_off += this_len - strm->avail_in; 159 (*env)->SetIntField(env, this, offID, this_off); 160 (*env)->SetIntField(env, this, lenID, strm->avail_in); 161 return len - strm->avail_out; 162 case Z_BUF_ERROR: 163 (*env)->SetBooleanField(env, this, setParamsID, JNI_FALSE); 164 return 0; 165 default: 166 JNU_ThrowInternalError(env, strm->msg); 167 return 0; 168 } 169 } else { 170 jboolean finish = (*env)->GetBooleanField(env, this, finishID); 171 in_buf = (*env)->GetPrimitiveArrayCritical(env, this_buf, 0); 172 if (in_buf == NULL) { 173 if (this_len != 0) 174 JNU_ThrowOutOfMemoryError(env, 0); 175 return 0; 176 } 177 out_buf = (*env)->GetPrimitiveArrayCritical(env, b, 0); 178 if (out_buf == NULL) { 179 (*env)->ReleasePrimitiveArrayCritical(env, this_buf, in_buf, 0); 180 if (len != 0) 181 JNU_ThrowOutOfMemoryError(env, 0); 182 183 return 0; 184 } 185 186 strm->next_in = (Bytef *) (in_buf + this_off); 187 strm->next_out = (Bytef *) (out_buf + off); 188 strm->avail_in = this_len; 189 strm->avail_out = len; 190 res = deflate(strm, finish ? Z_FINISH : flush); 191 (*env)->ReleasePrimitiveArrayCritical(env, b, out_buf, 0); 192 (*env)->ReleasePrimitiveArrayCritical(env, this_buf, in_buf, 0); 193 194 switch (res) { 195 case Z_STREAM_END: 196 (*env)->SetBooleanField(env, this, finishedID, JNI_TRUE); 197 /* fall through */ 198 case Z_OK: 199 this_off += this_len - strm->avail_in; 200 (*env)->SetIntField(env, this, offID, this_off); 201 (*env)->SetIntField(env, this, lenID, strm->avail_in); 202 return len - strm->avail_out; 203 case Z_BUF_ERROR: 204 return 0; 205 default: 206 JNU_ThrowInternalError(env, strm->msg); 207 return 0; 208 } 209 } 210 } 211 212 JNIEXPORT jint JNICALL 213 Java_java_util_zip_Deflater_getAdler(JNIEnv *env, jclass cls, jlong addr) 214 { 215 return ((z_stream *)jlong_to_ptr(addr))->adler; 216 } 217 218 JNIEXPORT void JNICALL 219 Java_java_util_zip_Deflater_reset(JNIEnv *env, jclass cls, jlong addr) 220 { 221 if (deflateReset((z_stream *)jlong_to_ptr(addr)) != Z_OK) { 222 JNU_ThrowInternalError(env, 0); 223 } 224 } 225 226 JNIEXPORT void JNICALL 227 Java_java_util_zip_Deflater_end(JNIEnv *env, jclass cls, jlong addr) 228 { 229 if (deflateEnd((z_stream *)jlong_to_ptr(addr)) == Z_STREAM_ERROR) { 230 JNU_ThrowInternalError(env, 0); 231 } else { 232 free((z_stream *)jlong_to_ptr(addr)); 233 } 234 }