J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2005 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any 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 strmID; |
| 42 | static jfieldID levelID; |
| 43 | static jfieldID strategyID; |
| 44 | static jfieldID setParamsID; |
| 45 | static jfieldID finishID; |
| 46 | static jfieldID finishedID; |
| 47 | static jfieldID bufID, offID, lenID; |
| 48 | |
| 49 | JNIEXPORT void JNICALL |
| 50 | Java_java_util_zip_Deflater_initIDs(JNIEnv *env, jclass cls) |
| 51 | { |
| 52 | strmID = (*env)->GetFieldID(env, cls, "strm", "J"); |
| 53 | levelID = (*env)->GetFieldID(env, cls, "level", "I"); |
| 54 | strategyID = (*env)->GetFieldID(env, cls, "strategy", "I"); |
| 55 | setParamsID = (*env)->GetFieldID(env, cls, "setParams", "Z"); |
| 56 | finishID = (*env)->GetFieldID(env, cls, "finish", "Z"); |
| 57 | finishedID = (*env)->GetFieldID(env, cls, "finished", "Z"); |
| 58 | bufID = (*env)->GetFieldID(env, cls, "buf", "[B"); |
| 59 | offID = (*env)->GetFieldID(env, cls, "off", "I"); |
| 60 | lenID = (*env)->GetFieldID(env, cls, "len", "I"); |
| 61 | } |
| 62 | |
| 63 | JNIEXPORT jlong JNICALL |
| 64 | Java_java_util_zip_Deflater_init(JNIEnv *env, jclass cls, jint level, |
| 65 | jint strategy, jboolean nowrap) |
| 66 | { |
| 67 | z_stream *strm = calloc(1, sizeof(z_stream)); |
| 68 | |
| 69 | if (strm == 0) { |
| 70 | JNU_ThrowOutOfMemoryError(env, 0); |
| 71 | return jlong_zero; |
| 72 | } else { |
| 73 | char *msg; |
| 74 | switch (deflateInit2(strm, level, Z_DEFLATED, |
| 75 | nowrap ? -MAX_WBITS : MAX_WBITS, |
| 76 | DEF_MEM_LEVEL, strategy)) { |
| 77 | case Z_OK: |
| 78 | return ptr_to_jlong(strm); |
| 79 | case Z_MEM_ERROR: |
| 80 | free(strm); |
| 81 | JNU_ThrowOutOfMemoryError(env, 0); |
| 82 | return jlong_zero; |
| 83 | case Z_STREAM_ERROR: |
| 84 | free(strm); |
| 85 | JNU_ThrowIllegalArgumentException(env, 0); |
| 86 | return jlong_zero; |
| 87 | default: |
| 88 | msg = strm->msg; |
| 89 | free(strm); |
| 90 | JNU_ThrowInternalError(env, msg); |
| 91 | return jlong_zero; |
| 92 | } |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | JNIEXPORT void JNICALL |
| 97 | Java_java_util_zip_Deflater_setDictionary(JNIEnv *env, jclass cls, jlong strm, |
| 98 | jarray b, jint off, jint len) |
| 99 | { |
| 100 | Bytef *buf = (*env)->GetPrimitiveArrayCritical(env, b, 0); |
| 101 | int res; |
| 102 | if (buf == 0) {/* out of memory */ |
| 103 | return; |
| 104 | } |
| 105 | res = deflateSetDictionary((z_stream *)jlong_to_ptr(strm), buf + off, len); |
| 106 | (*env)->ReleasePrimitiveArrayCritical(env, b, buf, 0); |
| 107 | switch (res) { |
| 108 | case Z_OK: |
| 109 | break; |
| 110 | case Z_STREAM_ERROR: |
| 111 | JNU_ThrowIllegalArgumentException(env, 0); |
| 112 | break; |
| 113 | default: |
| 114 | JNU_ThrowInternalError(env, ((z_stream *)jlong_to_ptr(strm))->msg); |
| 115 | break; |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | JNIEXPORT jint JNICALL |
| 120 | Java_java_util_zip_Deflater_deflateBytes(JNIEnv *env, jobject this, |
| 121 | jarray b, jint off, jint len) |
| 122 | { |
| 123 | z_stream *strm = jlong_to_ptr((*env)->GetLongField(env, this, strmID)); |
| 124 | |
| 125 | if (strm == 0) { |
| 126 | JNU_ThrowNullPointerException(env, 0); |
| 127 | return 0; |
| 128 | } else { |
| 129 | jarray this_buf = (*env)->GetObjectField(env, this, bufID); |
| 130 | jint this_off = (*env)->GetIntField(env, this, offID); |
| 131 | jint this_len = (*env)->GetIntField(env, this, lenID); |
| 132 | jbyte *in_buf; |
| 133 | jbyte *out_buf; |
| 134 | int res; |
| 135 | if ((*env)->GetBooleanField(env, this, setParamsID)) { |
| 136 | int level = (*env)->GetIntField(env, this, levelID); |
| 137 | int strategy = (*env)->GetIntField(env, this, strategyID); |
| 138 | |
| 139 | in_buf = (jbyte *) malloc(this_len); |
| 140 | if (in_buf == 0) { |
| 141 | return 0; |
| 142 | } |
| 143 | (*env)->GetByteArrayRegion(env, this_buf, this_off, this_len, in_buf); |
| 144 | |
| 145 | out_buf = (jbyte *) malloc(len); |
| 146 | if (out_buf == 0) { |
| 147 | free(in_buf); |
| 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | strm->next_in = (Bytef *) in_buf; |
| 152 | strm->next_out = (Bytef *) out_buf; |
| 153 | strm->avail_in = this_len; |
| 154 | strm->avail_out = len; |
| 155 | res = deflateParams(strm, level, strategy); |
| 156 | |
| 157 | if (res == Z_OK) { |
| 158 | (*env)->SetByteArrayRegion(env, b, off, len - strm->avail_out, out_buf); |
| 159 | } |
| 160 | free(out_buf); |
| 161 | free(in_buf); |
| 162 | |
| 163 | switch (res) { |
| 164 | case Z_OK: |
| 165 | (*env)->SetBooleanField(env, this, setParamsID, JNI_FALSE); |
| 166 | this_off += this_len - strm->avail_in; |
| 167 | (*env)->SetIntField(env, this, offID, this_off); |
| 168 | (*env)->SetIntField(env, this, lenID, strm->avail_in); |
| 169 | return len - strm->avail_out; |
| 170 | case Z_BUF_ERROR: |
| 171 | (*env)->SetBooleanField(env, this, setParamsID, JNI_FALSE); |
| 172 | return 0; |
| 173 | default: |
| 174 | JNU_ThrowInternalError(env, strm->msg); |
| 175 | return 0; |
| 176 | } |
| 177 | } else { |
| 178 | jboolean finish = (*env)->GetBooleanField(env, this, finishID); |
| 179 | |
| 180 | in_buf = (jbyte *) malloc(this_len); |
| 181 | if (in_buf == 0) { |
| 182 | return 0; |
| 183 | } |
| 184 | (*env)->GetByteArrayRegion(env, this_buf, this_off, this_len, in_buf); |
| 185 | |
| 186 | out_buf = (jbyte *) malloc(len); |
| 187 | if (out_buf == 0) { |
| 188 | free(in_buf); |
| 189 | return 0; |
| 190 | } |
| 191 | |
| 192 | strm->next_in = (Bytef *) in_buf; |
| 193 | strm->next_out = (Bytef *) out_buf; |
| 194 | strm->avail_in = this_len; |
| 195 | strm->avail_out = len; |
| 196 | res = deflate(strm, finish ? Z_FINISH : Z_NO_FLUSH); |
| 197 | |
| 198 | if (res == Z_STREAM_END || res == Z_OK) { |
| 199 | (*env)->SetByteArrayRegion(env, b, off, len - strm->avail_out, out_buf); |
| 200 | } |
| 201 | free(out_buf); |
| 202 | free(in_buf); |
| 203 | |
| 204 | switch (res) { |
| 205 | case Z_STREAM_END: |
| 206 | (*env)->SetBooleanField(env, this, finishedID, JNI_TRUE); |
| 207 | /* fall through */ |
| 208 | case Z_OK: |
| 209 | this_off += this_len - strm->avail_in; |
| 210 | (*env)->SetIntField(env, this, offID, this_off); |
| 211 | (*env)->SetIntField(env, this, lenID, strm->avail_in); |
| 212 | return len - strm->avail_out; |
| 213 | case Z_BUF_ERROR: |
| 214 | return 0; |
| 215 | default: |
| 216 | JNU_ThrowInternalError(env, strm->msg); |
| 217 | return 0; |
| 218 | } |
| 219 | } |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | JNIEXPORT jint JNICALL |
| 224 | Java_java_util_zip_Deflater_getAdler(JNIEnv *env, jclass cls, jlong strm) |
| 225 | { |
| 226 | return ((z_stream *)jlong_to_ptr(strm))->adler; |
| 227 | } |
| 228 | |
| 229 | JNIEXPORT jlong JNICALL |
| 230 | Java_java_util_zip_Deflater_getBytesRead(JNIEnv *env, jclass cls, jlong strm) |
| 231 | { |
| 232 | return ((z_stream *)jlong_to_ptr(strm))->total_in; |
| 233 | } |
| 234 | |
| 235 | JNIEXPORT jlong JNICALL |
| 236 | Java_java_util_zip_Deflater_getBytesWritten(JNIEnv *env, jclass cls, jlong strm) |
| 237 | { |
| 238 | return ((z_stream *)jlong_to_ptr(strm))->total_out; |
| 239 | } |
| 240 | |
| 241 | JNIEXPORT void JNICALL |
| 242 | Java_java_util_zip_Deflater_reset(JNIEnv *env, jclass cls, jlong strm) |
| 243 | { |
| 244 | if (deflateReset((z_stream *)jlong_to_ptr(strm)) != Z_OK) { |
| 245 | JNU_ThrowInternalError(env, 0); |
| 246 | } |
| 247 | } |
| 248 | |
| 249 | JNIEXPORT void JNICALL |
| 250 | Java_java_util_zip_Deflater_end(JNIEnv *env, jclass cls, jlong strm) |
| 251 | { |
| 252 | if (deflateEnd((z_stream *)jlong_to_ptr(strm)) == Z_STREAM_ERROR) { |
| 253 | JNU_ThrowInternalError(env, 0); |
| 254 | } else { |
| 255 | free((z_stream *)jlong_to_ptr(strm)); |
| 256 | } |
| 257 | } |