J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003 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 | #include <sys/types.h> |
| 26 | |
| 27 | #include <stdio.h> |
| 28 | #include <string.h> |
| 29 | #include <stdlib.h> |
| 30 | #include <stdarg.h> |
| 31 | |
| 32 | |
| 33 | #include <limits.h> |
| 34 | |
| 35 | #include <com_sun_java_util_jar_pack_NativeUnpack.h> |
| 36 | |
| 37 | #include "jni_util.h" |
| 38 | |
| 39 | #include "defines.h" |
| 40 | #include "bytes.h" |
| 41 | #include "utils.h" |
| 42 | #include "coding.h" |
| 43 | #include "bands.h" |
| 44 | #include "constants.h" |
| 45 | #include "zip.h" |
| 46 | #include "unpack.h" |
| 47 | |
| 48 | |
| 49 | static jfieldID unpackerPtrFID; |
| 50 | static jmethodID currentInstMID; |
| 51 | static jmethodID readInputMID; |
| 52 | static jclass NIclazz; |
| 53 | |
| 54 | static char* dbg = null; |
| 55 | |
| 56 | #define THROW_IOE(x) JNU_ThrowIOException(env,x) |
| 57 | |
| 58 | static jlong read_input_via_jni(unpacker* self, |
| 59 | void* buf, jlong minlen, jlong maxlen); |
| 60 | |
| 61 | static unpacker* get_unpacker(JNIEnv *env, jobject pObj, bool noCreate=false) { |
| 62 | unpacker* uPtr = (unpacker*) env->GetLongField(pObj, unpackerPtrFID); |
| 63 | //fprintf(stderr, "get_unpacker(%p) uPtr=%p\n", pObj, uPtr); |
| 64 | if (uPtr == null) { |
| 65 | if (noCreate) return null; |
| 66 | uPtr = new unpacker(); |
| 67 | if (uPtr == null) { |
| 68 | THROW_IOE(ERROR_ENOMEM); |
| 69 | return null; |
| 70 | } |
| 71 | //fprintf(stderr, "get_unpacker(%p) uPtr=%p initializing\n", pObj, uPtr); |
| 72 | uPtr->init(read_input_via_jni); |
| 73 | uPtr->jniobj = (void*) env->NewGlobalRef(pObj); |
| 74 | env->SetLongField(pObj, unpackerPtrFID, (jlong)uPtr); |
| 75 | } |
| 76 | uPtr->jnienv = env; // keep refreshing this in case of MT access |
| 77 | return uPtr; |
| 78 | } |
| 79 | |
| 80 | // This is the harder trick: Pull the current state out of mid-air. |
| 81 | static unpacker* get_unpacker() { |
| 82 | //fprintf(stderr, "get_unpacker()\n"); |
| 83 | JavaVM* vm = null; |
| 84 | JNI_GetCreatedJavaVMs(&vm, 1, null); |
| 85 | void* envRaw = null; |
| 86 | vm->GetEnv(&envRaw, JNI_VERSION_1_1); |
| 87 | JNIEnv* env = (JNIEnv*) envRaw; |
| 88 | //fprintf(stderr, "get_unpacker() env=%p\n", env); |
| 89 | if (env == null) |
| 90 | return null; |
| 91 | jobject pObj = env->CallStaticObjectMethod(NIclazz, currentInstMID); |
| 92 | //fprintf(stderr, "get_unpacker() pObj=%p\n", pObj); |
| 93 | if (pObj == null) |
| 94 | return null; |
| 95 | // Got pObj and env; now do it the easy way. |
| 96 | return get_unpacker(env, pObj); |
| 97 | } |
| 98 | |
| 99 | static void free_unpacker(JNIEnv *env, jobject pObj, unpacker* uPtr) { |
| 100 | if (uPtr != null) { |
| 101 | //fprintf(stderr, "free_unpacker(%p) uPtr=%p\n", pObj, uPtr); |
| 102 | env->DeleteGlobalRef((jobject) uPtr->jniobj); |
| 103 | uPtr->jniobj = null; |
| 104 | uPtr->free(); |
| 105 | delete uPtr; |
| 106 | env->SetLongField(pObj, unpackerPtrFID, (jlong)null); |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | unpacker* unpacker::current() { |
| 111 | return get_unpacker(); |
| 112 | } |
| 113 | |
| 114 | // Callback for fetching data, Java style. Calls NativeUnpack.readInputFn(). |
| 115 | static jlong read_input_via_jni(unpacker* self, |
| 116 | void* buf, jlong minlen, jlong maxlen) { |
| 117 | JNIEnv* env = (JNIEnv*) self->jnienv; |
| 118 | jobject pbuf = env->NewDirectByteBuffer(buf, maxlen); |
| 119 | return env->CallLongMethod((jobject) self->jniobj, readInputMID, |
| 120 | pbuf, minlen); |
| 121 | } |
| 122 | |
| 123 | JNIEXPORT void JNICALL |
| 124 | Java_com_sun_java_util_jar_pack_NativeUnpack_initIDs(JNIEnv *env, jclass clazz) { |
| 125 | dbg = getenv("DEBUG_ATTACH"); |
| 126 | while( dbg != null) { sleep(10); } |
| 127 | NIclazz = (jclass) env->NewGlobalRef(clazz); |
| 128 | unpackerPtrFID = env->GetFieldID(clazz, "unpackerPtr", "J"); |
| 129 | currentInstMID = env->GetStaticMethodID(clazz, "currentInstance", |
| 130 | "()Ljava/lang/Object;"); |
| 131 | readInputMID = env->GetMethodID(clazz, "readInputFn", |
| 132 | "(Ljava/nio/ByteBuffer;J)J"); |
| 133 | if (unpackerPtrFID == null || |
| 134 | currentInstMID == null || |
| 135 | readInputMID == null || |
| 136 | NIclazz == null) { |
| 137 | THROW_IOE("cannot init class members"); |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | JNIEXPORT jlong JNICALL |
| 142 | Java_com_sun_java_util_jar_pack_NativeUnpack_start(JNIEnv *env, jobject pObj, |
| 143 | jobject pBuf, jlong offset) { |
| 144 | unpacker* uPtr = get_unpacker(env, pObj); |
| 145 | |
| 146 | // redirect our io to the default log file or whatever. |
| 147 | uPtr->redirect_stdio(); |
| 148 | |
| 149 | void* buf = null; |
| 150 | size_t buflen = 0; |
| 151 | if (pBuf != null) { |
| 152 | buf = env->GetDirectBufferAddress(pBuf); |
| 153 | buflen = env->GetDirectBufferCapacity(pBuf); |
| 154 | if (buflen == 0) buf = null; |
| 155 | if (buf == null) { THROW_IOE(ERROR_INTERNAL); return 0; } |
| 156 | if ((size_t)offset >= buflen) |
| 157 | { buf = null; buflen = 0; } |
| 158 | else |
| 159 | { buf = (char*)buf + (size_t)offset; buflen -= (size_t)offset; } |
| 160 | } |
| 161 | |
| 162 | uPtr->start(buf, buflen); |
| 163 | if (uPtr->aborting()) { |
| 164 | THROW_IOE(uPtr->get_abort_message()); |
| 165 | return 0; |
| 166 | } |
| 167 | |
| 168 | return ((jlong) |
| 169 | uPtr->get_segments_remaining() << 32) |
| 170 | + uPtr->get_files_remaining(); |
| 171 | } |
| 172 | |
| 173 | JNIEXPORT jboolean JNICALL |
| 174 | Java_com_sun_java_util_jar_pack_NativeUnpack_getNextFile(JNIEnv *env, jobject pObj, |
| 175 | jobjectArray pParts) { |
| 176 | |
| 177 | unpacker* uPtr = get_unpacker(env, pObj); |
| 178 | unpacker::file* filep = uPtr->get_next_file(); |
| 179 | |
| 180 | if (uPtr->aborting()) { |
| 181 | THROW_IOE(uPtr->get_abort_message()); |
| 182 | return false; |
| 183 | } |
| 184 | |
| 185 | if (filep == null) { |
| 186 | return false; // end of the sequence |
| 187 | } |
| 188 | assert(filep == &uPtr->cur_file); |
| 189 | |
| 190 | int pidx = 0, iidx = 0; |
| 191 | jintArray pIntParts = (jintArray) env->GetObjectArrayElement(pParts, pidx++); |
| 192 | jint* intParts = env->GetIntArrayElements(pIntParts, null); |
| 193 | intParts[iidx++] = (jint)( (julong)filep->size >> 32 ); |
| 194 | intParts[iidx++] = (jint)( (julong)filep->size >> 0 ); |
| 195 | intParts[iidx++] = filep->modtime; |
| 196 | intParts[iidx++] = filep->deflate_hint() ? 1 : 0; |
| 197 | env->ReleaseIntArrayElements(pIntParts, intParts, JNI_COMMIT); |
| 198 | |
| 199 | env->SetObjectArrayElement(pParts, pidx++, env->NewStringUTF(filep->name)); |
| 200 | |
| 201 | jobject pDataBuf = null; |
| 202 | if (filep->data[0].len > 0) |
| 203 | pDataBuf = env->NewDirectByteBuffer(filep->data[0].ptr, |
| 204 | filep->data[0].len); |
| 205 | env->SetObjectArrayElement(pParts, pidx++, pDataBuf); |
| 206 | pDataBuf = null; |
| 207 | if (filep->data[1].len > 0) |
| 208 | pDataBuf = env->NewDirectByteBuffer(filep->data[1].ptr, |
| 209 | filep->data[1].len); |
| 210 | env->SetObjectArrayElement(pParts, pidx++, pDataBuf); |
| 211 | |
| 212 | return true; |
| 213 | } |
| 214 | |
| 215 | |
| 216 | JNIEXPORT jobject JNICALL |
| 217 | Java_com_sun_java_util_jar_pack_NativeUnpack_getUnusedInput(JNIEnv *env, jobject pObj) { |
| 218 | unpacker* uPtr = get_unpacker(env, pObj); |
| 219 | unpacker::file* filep = &uPtr->cur_file; |
| 220 | |
| 221 | if (uPtr->aborting()) { |
| 222 | THROW_IOE(uPtr->get_abort_message()); |
| 223 | return false; |
| 224 | } |
| 225 | |
| 226 | // We have fetched all the files. |
| 227 | // Now swallow up any remaining input. |
| 228 | if (uPtr->input_remaining() == 0) |
| 229 | return null; |
| 230 | else |
| 231 | return env->NewDirectByteBuffer(uPtr->input_scan(), |
| 232 | uPtr->input_remaining()); |
| 233 | } |
| 234 | |
| 235 | JNIEXPORT jlong JNICALL |
| 236 | Java_com_sun_java_util_jar_pack_NativeUnpack_finish(JNIEnv *env, jobject pObj) { |
| 237 | unpacker* uPtr = get_unpacker(env, pObj, false); |
| 238 | if (uPtr == null) return 0; |
| 239 | size_t consumed = uPtr->input_consumed(); |
| 240 | free_unpacker(env, pObj, uPtr); |
| 241 | return consumed; |
| 242 | } |
| 243 | |
| 244 | JNIEXPORT jboolean JNICALL |
| 245 | Java_com_sun_java_util_jar_pack_NativeUnpack_setOption(JNIEnv *env, jobject pObj, |
| 246 | jstring pProp, jstring pValue) { |
| 247 | unpacker* uPtr = get_unpacker(env, pObj); |
| 248 | const char* prop = env->GetStringUTFChars(pProp, JNI_FALSE); |
| 249 | const char* value = env->GetStringUTFChars(pValue, JNI_FALSE); |
| 250 | jboolean retval = uPtr->set_option(prop, value); |
| 251 | env->ReleaseStringUTFChars(pProp, prop); |
| 252 | env->ReleaseStringUTFChars(pValue, value); |
| 253 | return retval; |
| 254 | } |
| 255 | |
| 256 | JNIEXPORT jstring JNICALL |
| 257 | Java_com_sun_java_util_jar_pack_NativeUnpack_getOption(JNIEnv *env, jobject pObj, |
| 258 | jstring pProp) { |
| 259 | |
| 260 | unpacker* uPtr = get_unpacker(env, pObj); |
| 261 | const char* prop = env->GetStringUTFChars(pProp, JNI_FALSE); |
| 262 | const char* value = uPtr->get_option(prop); |
| 263 | env->ReleaseStringUTFChars(pProp, prop); |
| 264 | if (value == null) return null; |
| 265 | return env->NewStringUTF(value); |
| 266 | } |