Initial Contribution
diff --git a/libs/utils/Parcel.cpp b/libs/utils/Parcel.cpp
new file mode 100644
index 0000000..3eca4b0
--- /dev/null
+++ b/libs/utils/Parcel.cpp
@@ -0,0 +1,1311 @@
+/*
+ * Copyright (C) 2005 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "Parcel"
+//#define LOG_NDEBUG 0
+
+#include <utils/Parcel.h>
+
+#include <utils/Binder.h>
+#include <utils/BpBinder.h>
+#include <utils/Debug.h>
+#include <utils/ProcessState.h>
+#include <utils/Log.h>
+#include <utils/String8.h>
+#include <utils/String16.h>
+#include <utils/TextOutput.h>
+#include <utils/misc.h>
+
+#include <private/utils/binder_module.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#ifndef INT32_MAX
+#define INT32_MAX ((int32_t)(2147483647))
+#endif
+
+#define LOG_REFS(...)
+//#define LOG_REFS(...) LOG(LOG_DEBUG, "Parcel", __VA_ARGS__)
+
+// ---------------------------------------------------------------------------
+
+#define PAD_SIZE(s) (((s)+3)&~3)
+
+// XXX This can be made public if we want to provide
+// support for typed data.
+struct small_flat_data
+{
+ uint32_t type;
+ uint32_t data;
+};
+
+namespace android {
+
+void acquire_object(const sp<ProcessState>& proc,
+ const flat_binder_object& obj, const void* who)
+{
+ switch (obj.type) {
+ case BINDER_TYPE_BINDER:
+ if (obj.binder) {
+ LOG_REFS("Parcel %p acquiring reference on local %p", who, obj.cookie);
+ static_cast<IBinder*>(obj.cookie)->incStrong(who);
+ }
+ return;
+ case BINDER_TYPE_WEAK_BINDER:
+ if (obj.binder)
+ static_cast<RefBase::weakref_type*>(obj.binder)->incWeak(who);
+ return;
+ case BINDER_TYPE_HANDLE: {
+ const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle);
+ if (b != NULL) {
+ LOG_REFS("Parcel %p acquiring reference on remote %p", who, b.get());
+ b->incStrong(who);
+ }
+ return;
+ }
+ case BINDER_TYPE_WEAK_HANDLE: {
+ const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle);
+ if (b != NULL) b.get_refs()->incWeak(who);
+ return;
+ }
+ case BINDER_TYPE_FD: {
+ // intentionally blank -- nothing to do to acquire this, but we do
+ // recognize it as a legitimate object type.
+ return;
+ }
+ }
+
+ LOGD("Invalid object type 0x%08lx", obj.type);
+}
+
+void release_object(const sp<ProcessState>& proc,
+ const flat_binder_object& obj, const void* who)
+{
+ switch (obj.type) {
+ case BINDER_TYPE_BINDER:
+ if (obj.binder) {
+ LOG_REFS("Parcel %p releasing reference on local %p", who, obj.cookie);
+ static_cast<IBinder*>(obj.cookie)->decStrong(who);
+ }
+ return;
+ case BINDER_TYPE_WEAK_BINDER:
+ if (obj.binder)
+ static_cast<RefBase::weakref_type*>(obj.binder)->decWeak(who);
+ return;
+ case BINDER_TYPE_HANDLE: {
+ const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle);
+ if (b != NULL) {
+ LOG_REFS("Parcel %p releasing reference on remote %p", who, b.get());
+ b->decStrong(who);
+ }
+ return;
+ }
+ case BINDER_TYPE_WEAK_HANDLE: {
+ const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle);
+ if (b != NULL) b.get_refs()->decWeak(who);
+ return;
+ }
+ case BINDER_TYPE_FD: {
+ if (obj.cookie != (void*)0) close(obj.handle);
+ return;
+ }
+ }
+
+ LOGE("Invalid object type 0x%08lx", obj.type);
+}
+
+inline static status_t finish_flatten_binder(
+ const sp<IBinder>& binder, const flat_binder_object& flat, Parcel* out)
+{
+ return out->writeObject(flat, false);
+}
+
+status_t flatten_binder(const sp<ProcessState>& proc,
+ const sp<IBinder>& binder, Parcel* out)
+{
+ flat_binder_object obj;
+
+ obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS;
+ if (binder != NULL) {
+ IBinder *local = binder->localBinder();
+ if (!local) {
+ BpBinder *proxy = binder->remoteBinder();
+ if (proxy == NULL) {
+ LOGE("null proxy");
+ }
+ const int32_t handle = proxy ? proxy->handle() : 0;
+ obj.type = BINDER_TYPE_HANDLE;
+ obj.handle = handle;
+ obj.cookie = NULL;
+ } else {
+ obj.type = BINDER_TYPE_BINDER;
+ obj.binder = local->getWeakRefs();
+ obj.cookie = local;
+ }
+ } else {
+ obj.type = BINDER_TYPE_BINDER;
+ obj.binder = NULL;
+ obj.cookie = NULL;
+ }
+
+ return finish_flatten_binder(binder, obj, out);
+}
+
+status_t flatten_binder(const sp<ProcessState>& proc,
+ const wp<IBinder>& binder, Parcel* out)
+{
+ flat_binder_object obj;
+
+ obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS;
+ if (binder != NULL) {
+ sp<IBinder> real = binder.promote();
+ if (real != NULL) {
+ IBinder *local = real->localBinder();
+ if (!local) {
+ BpBinder *proxy = real->remoteBinder();
+ if (proxy == NULL) {
+ LOGE("null proxy");
+ }
+ const int32_t handle = proxy ? proxy->handle() : 0;
+ obj.type = BINDER_TYPE_WEAK_HANDLE;
+ obj.handle = handle;
+ obj.cookie = NULL;
+ } else {
+ obj.type = BINDER_TYPE_WEAK_BINDER;
+ obj.binder = binder.get_refs();
+ obj.cookie = binder.unsafe_get();
+ }
+ return finish_flatten_binder(real, obj, out);
+ }
+
+ // XXX How to deal? In order to flatten the given binder,
+ // we need to probe it for information, which requires a primary
+ // reference... but we don't have one.
+ //
+ // The OpenBinder implementation uses a dynamic_cast<> here,
+ // but we can't do that with the different reference counting
+ // implementation we are using.
+ LOGE("Unable to unflatten Binder weak reference!");
+ obj.type = BINDER_TYPE_BINDER;
+ obj.binder = NULL;
+ obj.cookie = NULL;
+ return finish_flatten_binder(NULL, obj, out);
+
+ } else {
+ obj.type = BINDER_TYPE_BINDER;
+ obj.binder = NULL;
+ obj.cookie = NULL;
+ return finish_flatten_binder(NULL, obj, out);
+ }
+}
+
+inline static status_t finish_unflatten_binder(
+ BpBinder* proxy, const flat_binder_object& flat, const Parcel& in)
+{
+ return NO_ERROR;
+}
+
+status_t unflatten_binder(const sp<ProcessState>& proc,
+ const Parcel& in, sp<IBinder>* out)
+{
+ const flat_binder_object* flat = in.readObject(false);
+
+ if (flat) {
+ switch (flat->type) {
+ case BINDER_TYPE_BINDER:
+ *out = static_cast<IBinder*>(flat->cookie);
+ return finish_unflatten_binder(NULL, *flat, in);
+ case BINDER_TYPE_HANDLE:
+ *out = proc->getStrongProxyForHandle(flat->handle);
+ return finish_unflatten_binder(
+ static_cast<BpBinder*>(out->get()), *flat, in);
+ }
+ }
+ return BAD_TYPE;
+}
+
+status_t unflatten_binder(const sp<ProcessState>& proc,
+ const Parcel& in, wp<IBinder>* out)
+{
+ const flat_binder_object* flat = in.readObject(false);
+
+ if (flat) {
+ switch (flat->type) {
+ case BINDER_TYPE_BINDER:
+ *out = static_cast<IBinder*>(flat->cookie);
+ return finish_unflatten_binder(NULL, *flat, in);
+ case BINDER_TYPE_WEAK_BINDER:
+ if (flat->binder != NULL) {
+ out->set_object_and_refs(
+ static_cast<IBinder*>(flat->cookie),
+ static_cast<RefBase::weakref_type*>(flat->binder));
+ } else {
+ *out = NULL;
+ }
+ return finish_unflatten_binder(NULL, *flat, in);
+ case BINDER_TYPE_HANDLE:
+ case BINDER_TYPE_WEAK_HANDLE:
+ *out = proc->getWeakProxyForHandle(flat->handle);
+ return finish_unflatten_binder(
+ static_cast<BpBinder*>(out->unsafe_get()), *flat, in);
+ }
+ }
+ return BAD_TYPE;
+}
+
+// ---------------------------------------------------------------------------
+
+Parcel::Parcel()
+{
+ initState();
+}
+
+Parcel::~Parcel()
+{
+ freeDataNoInit();
+}
+
+const uint8_t* Parcel::data() const
+{
+ return mData;
+}
+
+size_t Parcel::dataSize() const
+{
+ return (mDataSize > mDataPos ? mDataSize : mDataPos);
+}
+
+size_t Parcel::dataAvail() const
+{
+ // TODO: decide what to do about the possibility that this can
+ // report an available-data size that exceeds a Java int's max
+ // positive value, causing havoc. Fortunately this will only
+ // happen if someone constructs a Parcel containing more than two
+ // gigabytes of data, which on typical phone hardware is simply
+ // not possible.
+ return dataSize() - dataPosition();
+}
+
+size_t Parcel::dataPosition() const
+{
+ return mDataPos;
+}
+
+size_t Parcel::dataCapacity() const
+{
+ return mDataCapacity;
+}
+
+status_t Parcel::setDataSize(size_t size)
+{
+ status_t err;
+ err = continueWrite(size);
+ if (err == NO_ERROR) {
+ mDataSize = size;
+ LOGV("setDataSize Setting data size of %p to %d\n", this, mDataSize);
+ }
+ return err;
+}
+
+void Parcel::setDataPosition(size_t pos) const
+{
+ mDataPos = pos;
+ mNextObjectHint = 0;
+}
+
+status_t Parcel::setDataCapacity(size_t size)
+{
+ if (size > mDataSize) return continueWrite(size);
+ return NO_ERROR;
+}
+
+status_t Parcel::setData(const uint8_t* buffer, size_t len)
+{
+ status_t err = restartWrite(len);
+ if (err == NO_ERROR) {
+ memcpy(const_cast<uint8_t*>(data()), buffer, len);
+ mDataSize = len;
+ mFdsKnown = false;
+ }
+ return err;
+}
+
+status_t Parcel::appendFrom(Parcel *parcel, size_t offset, size_t len)
+{
+ const sp<ProcessState> proc(ProcessState::self());
+ status_t err;
+ uint8_t *data = parcel->mData;
+ size_t *objects = parcel->mObjects;
+ size_t size = parcel->mObjectsSize;
+ int startPos = mDataPos;
+ int firstIndex = -1, lastIndex = -2;
+
+ if (len == 0) {
+ return NO_ERROR;
+ }
+
+ // range checks against the source parcel size
+ if ((offset > parcel->mDataSize)
+ || (len > parcel->mDataSize)
+ || (offset + len > parcel->mDataSize)) {
+ return BAD_VALUE;
+ }
+
+ // Count objects in range
+ for (int i = 0; i < (int) size; i++) {
+ size_t off = objects[i];
+ if ((off >= offset) && (off < offset + len)) {
+ if (firstIndex == -1) {
+ firstIndex = i;
+ }
+ lastIndex = i;
+ }
+ }
+ int numObjects = lastIndex - firstIndex + 1;
+
+ // grow data
+ err = growData(len);
+ if (err != NO_ERROR) {
+ return err;
+ }
+
+ // append data
+ memcpy(mData + mDataPos, data + offset, len);
+ mDataPos += len;
+ mDataSize += len;
+
+ if (numObjects > 0) {
+ // grow objects
+ if (mObjectsCapacity < mObjectsSize + numObjects) {
+ int newSize = ((mObjectsSize + numObjects)*3)/2;
+ size_t *objects =
+ (size_t*)realloc(mObjects, newSize*sizeof(size_t));
+ if (objects == (size_t*)0) {
+ return NO_MEMORY;
+ }
+ mObjects = objects;
+ mObjectsCapacity = newSize;
+ }
+
+ // append and acquire objects
+ int idx = mObjectsSize;
+ for (int i = firstIndex; i <= lastIndex; i++) {
+ size_t off = objects[i] - offset + startPos;
+ mObjects[idx++] = off;
+ mObjectsSize++;
+
+ const flat_binder_object* flat
+ = reinterpret_cast<flat_binder_object*>(mData + off);
+ acquire_object(proc, *flat, this);
+
+ // take note if the object is a file descriptor
+ if (flat->type == BINDER_TYPE_FD) {
+ mHasFds = mFdsKnown = true;
+ }
+ }
+ }
+
+ return NO_ERROR;
+}
+
+bool Parcel::hasFileDescriptors() const
+{
+ if (!mFdsKnown) {
+ scanForFds();
+ }
+ return mHasFds;
+}
+
+status_t Parcel::writeInterfaceToken(const String16& interface)
+{
+ // currently the interface identification token is just its name as a string
+ return writeString16(interface);
+}
+
+bool Parcel::enforceInterface(const String16& interface) const
+{
+ String16 str = readString16();
+ if (str == interface) {
+ return true;
+ } else {
+ LOGW("**** enforceInterface() expected '%s' but read '%s'\n",
+ String8(interface).string(), String8(str).string());
+ return false;
+ }
+}
+
+const size_t* Parcel::objects() const
+{
+ return mObjects;
+}
+
+size_t Parcel::objectsCount() const
+{
+ return mObjectsSize;
+}
+
+status_t Parcel::errorCheck() const
+{
+ return mError;
+}
+
+void Parcel::setError(status_t err)
+{
+ mError = err;
+}
+
+status_t Parcel::finishWrite(size_t len)
+{
+ //printf("Finish write of %d\n", len);
+ mDataPos += len;
+ LOGV("finishWrite Setting data pos of %p to %d\n", this, mDataPos);
+ if (mDataPos > mDataSize) {
+ mDataSize = mDataPos;
+ LOGV("finishWrite Setting data size of %p to %d\n", this, mDataSize);
+ }
+ //printf("New pos=%d, size=%d\n", mDataPos, mDataSize);
+ return NO_ERROR;
+}
+
+status_t Parcel::writeUnpadded(const void* data, size_t len)
+{
+ size_t end = mDataPos + len;
+ if (end < mDataPos) {
+ // integer overflow
+ return BAD_VALUE;
+ }
+
+ if (end <= mDataCapacity) {
+restart_write:
+ memcpy(mData+mDataPos, data, len);
+ return finishWrite(len);
+ }
+
+ status_t err = growData(len);
+ if (err == NO_ERROR) goto restart_write;
+ return err;
+}
+
+status_t Parcel::write(const void* data, size_t len)
+{
+ void* const d = writeInplace(len);
+ if (d) {
+ memcpy(d, data, len);
+ return NO_ERROR;
+ }
+ return mError;
+}
+
+void* Parcel::writeInplace(size_t len)
+{
+ const size_t padded = PAD_SIZE(len);
+
+ // sanity check for integer overflow
+ if (mDataPos+padded < mDataPos) {
+ return NULL;
+ }
+
+ if ((mDataPos+padded) <= mDataCapacity) {
+restart_write:
+ //printf("Writing %ld bytes, padded to %ld\n", len, padded);
+ uint8_t* const data = mData+mDataPos;
+
+ // Need to pad at end?
+ if (padded != len) {
+#if BYTE_ORDER == BIG_ENDIAN
+ static const uint32_t mask[4] = {
+ 0x00000000, 0xffffff00, 0xffff0000, 0xff000000
+ };
+#endif
+#if BYTE_ORDER == LITTLE_ENDIAN
+ static const uint32_t mask[4] = {
+ 0x00000000, 0x00ffffff, 0x0000ffff, 0x000000ff
+ };
+#endif
+ //printf("Applying pad mask: %p to %p\n", (void*)mask[padded-len],
+ // *reinterpret_cast<void**>(data+padded-4));
+ *reinterpret_cast<uint32_t*>(data+padded-4) &= mask[padded-len];
+ }
+
+ finishWrite(padded);
+ return data;
+ }
+
+ status_t err = growData(padded);
+ if (err == NO_ERROR) goto restart_write;
+ return NULL;
+}
+
+status_t Parcel::writeInt32(int32_t val)
+{
+ if ((mDataPos+sizeof(val)) <= mDataCapacity) {
+restart_write:
+ *reinterpret_cast<int32_t*>(mData+mDataPos) = val;
+ return finishWrite(sizeof(val));
+ }
+
+ status_t err = growData(sizeof(val));
+ if (err == NO_ERROR) goto restart_write;
+ return err;
+}
+
+status_t Parcel::writeInt64(int64_t val)
+{
+ if ((mDataPos+sizeof(val)) <= mDataCapacity) {
+restart_write:
+ *reinterpret_cast<int64_t*>(mData+mDataPos) = val;
+ return finishWrite(sizeof(val));
+ }
+
+ status_t err = growData(sizeof(val));
+ if (err == NO_ERROR) goto restart_write;
+ return err;
+}
+
+status_t Parcel::writeFloat(float val)
+{
+ if ((mDataPos+sizeof(val)) <= mDataCapacity) {
+restart_write:
+ *reinterpret_cast<float*>(mData+mDataPos) = val;
+ return finishWrite(sizeof(val));
+ }
+
+ status_t err = growData(sizeof(val));
+ if (err == NO_ERROR) goto restart_write;
+ return err;
+}
+
+status_t Parcel::writeDouble(double val)
+{
+ if ((mDataPos+sizeof(val)) <= mDataCapacity) {
+restart_write:
+ *reinterpret_cast<double*>(mData+mDataPos) = val;
+ return finishWrite(sizeof(val));
+ }
+
+ status_t err = growData(sizeof(val));
+ if (err == NO_ERROR) goto restart_write;
+ return err;
+}
+
+status_t Parcel::writeCString(const char* str)
+{
+ return write(str, strlen(str)+1);
+}
+
+status_t Parcel::writeString8(const String8& str)
+{
+ status_t err = writeInt32(str.bytes());
+ if (err == NO_ERROR) {
+ err = write(str.string(), str.bytes()+1);
+ }
+ return err;
+}
+
+status_t Parcel::writeString16(const String16& str)
+{
+ return writeString16(str.string(), str.size());
+}
+
+status_t Parcel::writeString16(const char16_t* str, size_t len)
+{
+ if (str == NULL) return writeInt32(-1);
+
+ status_t err = writeInt32(len);
+ if (err == NO_ERROR) {
+ len *= sizeof(char16_t);
+ uint8_t* data = (uint8_t*)writeInplace(len+sizeof(char16_t));
+ if (data) {
+ memcpy(data, str, len);
+ *reinterpret_cast<char16_t*>(data+len) = 0;
+ return NO_ERROR;
+ }
+ err = mError;
+ }
+ return err;
+}
+
+status_t Parcel::writeStrongBinder(const sp<IBinder>& val)
+{
+ return flatten_binder(ProcessState::self(), val, this);
+}
+
+status_t Parcel::writeWeakBinder(const wp<IBinder>& val)
+{
+ return flatten_binder(ProcessState::self(), val, this);
+}
+
+status_t Parcel::writeFileDescriptor(int fd)
+{
+ flat_binder_object obj;
+ obj.type = BINDER_TYPE_FD;
+ obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS;
+ obj.handle = fd;
+ obj.cookie = (void*)0;
+ return writeObject(obj, true);
+}
+
+status_t Parcel::writeDupFileDescriptor(int fd)
+{
+ flat_binder_object obj;
+ obj.type = BINDER_TYPE_FD;
+ obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS;
+ obj.handle = dup(fd);
+ obj.cookie = (void*)1;
+ return writeObject(obj, true);
+}
+
+status_t Parcel::writeObject(const flat_binder_object& val, bool nullMetaData)
+{
+ const bool enoughData = (mDataPos+sizeof(val)) <= mDataCapacity;
+ const bool enoughObjects = mObjectsSize < mObjectsCapacity;
+ if (enoughData && enoughObjects) {
+restart_write:
+ *reinterpret_cast<flat_binder_object*>(mData+mDataPos) = val;
+
+ // Need to write meta-data?
+ if (nullMetaData || val.binder != NULL) {
+ mObjects[mObjectsSize] = mDataPos;
+ acquire_object(ProcessState::self(), val, this);
+ mObjectsSize++;
+ }
+
+ // remember if it's a file descriptor
+ if (val.type == BINDER_TYPE_FD) {
+ mHasFds = mFdsKnown = true;
+ }
+
+ return finishWrite(sizeof(flat_binder_object));
+ }
+
+ if (!enoughData) {
+ const status_t err = growData(sizeof(val));
+ if (err != NO_ERROR) return err;
+ }
+ if (!enoughObjects) {
+ size_t newSize = ((mObjectsSize+2)*3)/2;
+ size_t* objects = (size_t*)realloc(mObjects, newSize*sizeof(size_t));
+ if (objects == NULL) return NO_MEMORY;
+ mObjects = objects;
+ mObjectsCapacity = newSize;
+ }
+
+ goto restart_write;
+}
+
+
+void Parcel::remove(size_t start, size_t amt)
+{
+ LOG_ALWAYS_FATAL("Parcel::remove() not yet implemented!");
+}
+
+status_t Parcel::read(void* outData, size_t len) const
+{
+ if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) {
+ memcpy(outData, mData+mDataPos, len);
+ mDataPos += PAD_SIZE(len);
+ LOGV("read Setting data pos of %p to %d\n", this, mDataPos);
+ return NO_ERROR;
+ }
+ return NOT_ENOUGH_DATA;
+}
+
+const void* Parcel::readInplace(size_t len) const
+{
+ if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) {
+ const void* data = mData+mDataPos;
+ mDataPos += PAD_SIZE(len);
+ LOGV("readInplace Setting data pos of %p to %d\n", this, mDataPos);
+ return data;
+ }
+ return NULL;
+}
+
+status_t Parcel::readInt32(int32_t *pArg) const
+{
+ if ((mDataPos+sizeof(int32_t)) <= mDataSize) {
+ const void* data = mData+mDataPos;
+ mDataPos += sizeof(int32_t);
+ *pArg = *reinterpret_cast<const int32_t*>(data);
+ return NO_ERROR;
+ } else {
+ return NOT_ENOUGH_DATA;
+ }
+}
+
+int32_t Parcel::readInt32() const
+{
+ if ((mDataPos+sizeof(int32_t)) <= mDataSize) {
+ const void* data = mData+mDataPos;
+ mDataPos += sizeof(int32_t);
+ LOGV("readInt32 Setting data pos of %p to %d\n", this, mDataPos);
+ return *reinterpret_cast<const int32_t*>(data);
+ }
+ return 0;
+}
+
+
+status_t Parcel::readInt64(int64_t *pArg) const
+{
+ if ((mDataPos+sizeof(int64_t)) <= mDataSize) {
+ const void* data = mData+mDataPos;
+ mDataPos += sizeof(int64_t);
+ *pArg = *reinterpret_cast<const int64_t*>(data);
+ LOGV("readInt64 Setting data pos of %p to %d\n", this, mDataPos);
+ return NO_ERROR;
+ } else {
+ return NOT_ENOUGH_DATA;
+ }
+}
+
+
+int64_t Parcel::readInt64() const
+{
+ if ((mDataPos+sizeof(int64_t)) <= mDataSize) {
+ const void* data = mData+mDataPos;
+ mDataPos += sizeof(int64_t);
+ LOGV("readInt64 Setting data pos of %p to %d\n", this, mDataPos);
+ return *reinterpret_cast<const int64_t*>(data);
+ }
+ return 0;
+}
+
+status_t Parcel::readFloat(float *pArg) const
+{
+ if ((mDataPos+sizeof(float)) <= mDataSize) {
+ const void* data = mData+mDataPos;
+ mDataPos += sizeof(float);
+ LOGV("readFloat Setting data pos of %p to %d\n", this, mDataPos);
+ *pArg = *reinterpret_cast<const float*>(data);
+ return NO_ERROR;
+ } else {
+ return NOT_ENOUGH_DATA;
+ }
+}
+
+
+float Parcel::readFloat() const
+{
+ if ((mDataPos+sizeof(float)) <= mDataSize) {
+ const void* data = mData+mDataPos;
+ mDataPos += sizeof(float);
+ LOGV("readFloat Setting data pos of %p to %d\n", this, mDataPos);
+ return *reinterpret_cast<const float*>(data);
+ }
+ return 0;
+}
+
+status_t Parcel::readDouble(double *pArg) const
+{
+ if ((mDataPos+sizeof(double)) <= mDataSize) {
+ const void* data = mData+mDataPos;
+ mDataPos += sizeof(double);
+ LOGV("readDouble Setting data pos of %p to %d\n", this, mDataPos);
+ *pArg = *reinterpret_cast<const double*>(data);
+ return NO_ERROR;
+ } else {
+ return NOT_ENOUGH_DATA;
+ }
+}
+
+
+double Parcel::readDouble() const
+{
+ if ((mDataPos+sizeof(double)) <= mDataSize) {
+ const void* data = mData+mDataPos;
+ mDataPos += sizeof(double);
+ LOGV("readDouble Setting data pos of %p to %d\n", this, mDataPos);
+ return *reinterpret_cast<const double*>(data);
+ }
+ return 0;
+}
+
+
+const char* Parcel::readCString() const
+{
+ const size_t avail = mDataSize-mDataPos;
+ if (avail > 0) {
+ const char* str = reinterpret_cast<const char*>(mData+mDataPos);
+ // is the string's trailing NUL within the parcel's valid bounds?
+ const char* eos = reinterpret_cast<const char*>(memchr(str, 0, avail));
+ if (eos) {
+ const size_t len = eos - str;
+ mDataPos += PAD_SIZE(len+1);
+ LOGV("readCString Setting data pos of %p to %d\n", this, mDataPos);
+ return str;
+ }
+ }
+ return NULL;
+}
+
+String8 Parcel::readString8() const
+{
+ int32_t size = readInt32();
+ // watch for potential int overflow adding 1 for trailing NUL
+ if (size > 0 && size < INT32_MAX) {
+ const char* str = (const char*)readInplace(size+1);
+ if (str) return String8(str, size);
+ }
+ return String8();
+}
+
+String16 Parcel::readString16() const
+{
+ size_t len;
+ const char16_t* str = readString16Inplace(&len);
+ if (str) return String16(str, len);
+ LOGE("Reading a NULL string not supported here.");
+ return String16();
+}
+
+const char16_t* Parcel::readString16Inplace(size_t* outLen) const
+{
+ int32_t size = readInt32();
+ // watch for potential int overflow from size+1
+ if (size >= 0 && size < INT32_MAX) {
+ *outLen = size;
+ const char16_t* str = (const char16_t*)readInplace((size+1)*sizeof(char16_t));
+ if (str != NULL) {
+ return str;
+ }
+ }
+ *outLen = 0;
+ return NULL;
+}
+
+sp<IBinder> Parcel::readStrongBinder() const
+{
+ sp<IBinder> val;
+ unflatten_binder(ProcessState::self(), *this, &val);
+ return val;
+}
+
+wp<IBinder> Parcel::readWeakBinder() const
+{
+ wp<IBinder> val;
+ unflatten_binder(ProcessState::self(), *this, &val);
+ return val;
+}
+
+int Parcel::readFileDescriptor() const
+{
+ const flat_binder_object* flat = readObject(true);
+ if (flat) {
+ switch (flat->type) {
+ case BINDER_TYPE_FD:
+ //LOGI("Returning file descriptor %ld from parcel %p\n", flat->handle, this);
+ return flat->handle;
+ }
+ }
+ return BAD_TYPE;
+}
+
+const flat_binder_object* Parcel::readObject(bool nullMetaData) const
+{
+ const size_t DPOS = mDataPos;
+ if ((DPOS+sizeof(flat_binder_object)) <= mDataSize) {
+ const flat_binder_object* obj
+ = reinterpret_cast<const flat_binder_object*>(mData+DPOS);
+ mDataPos = DPOS + sizeof(flat_binder_object);
+ if (!nullMetaData && (obj->cookie == NULL && obj->binder == NULL)) {
+ // When transfering a NULL object, we don't write it into
+ // the object list, so we don't want to check for it when
+ // reading.
+ LOGV("readObject Setting data pos of %p to %d\n", this, mDataPos);
+ return obj;
+ }
+
+ // Ensure that this object is valid...
+ size_t* const OBJS = mObjects;
+ const size_t N = mObjectsSize;
+ size_t opos = mNextObjectHint;
+
+ if (N > 0) {
+ LOGV("Parcel %p looking for obj at %d, hint=%d\n",
+ this, DPOS, opos);
+
+ // Start at the current hint position, looking for an object at
+ // the current data position.
+ if (opos < N) {
+ while (opos < (N-1) && OBJS[opos] < DPOS) {
+ opos++;
+ }
+ } else {
+ opos = N-1;
+ }
+ if (OBJS[opos] == DPOS) {
+ // Found it!
+ LOGV("Parcel found obj %d at index %d with forward search",
+ this, DPOS, opos);
+ mNextObjectHint = opos+1;
+ LOGV("readObject Setting data pos of %p to %d\n", this, mDataPos);
+ return obj;
+ }
+
+ // Look backwards for it...
+ while (opos > 0 && OBJS[opos] > DPOS) {
+ opos--;
+ }
+ if (OBJS[opos] == DPOS) {
+ // Found it!
+ LOGV("Parcel found obj %d at index %d with backward search",
+ this, DPOS, opos);
+ mNextObjectHint = opos+1;
+ LOGV("readObject Setting data pos of %p to %d\n", this, mDataPos);
+ return obj;
+ }
+ }
+ LOGW("Attempt to read object from Parcel %p at offset %d that is not in the object list",
+ this, DPOS);
+ }
+ return NULL;
+}
+
+void Parcel::closeFileDescriptors()
+{
+ size_t i = mObjectsSize;
+ if (i > 0) {
+ //LOGI("Closing file descriptors for %d objects...", mObjectsSize);
+ }
+ while (i > 0) {
+ i--;
+ const flat_binder_object* flat
+ = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]);
+ if (flat->type == BINDER_TYPE_FD) {
+ //LOGI("Closing fd: %ld\n", flat->handle);
+ close(flat->handle);
+ }
+ }
+}
+
+const uint8_t* Parcel::ipcData() const
+{
+ return mData;
+}
+
+size_t Parcel::ipcDataSize() const
+{
+ return (mDataSize > mDataPos ? mDataSize : mDataPos);
+}
+
+const size_t* Parcel::ipcObjects() const
+{
+ return mObjects;
+}
+
+size_t Parcel::ipcObjectsCount() const
+{
+ return mObjectsSize;
+}
+
+void Parcel::ipcSetDataReference(const uint8_t* data, size_t dataSize,
+ const size_t* objects, size_t objectsCount, release_func relFunc, void* relCookie)
+{
+ freeDataNoInit();
+ mError = NO_ERROR;
+ mData = const_cast<uint8_t*>(data);
+ mDataSize = mDataCapacity = dataSize;
+ //LOGI("setDataReference Setting data size of %p to %lu (pid=%d)\n", this, mDataSize, getpid());
+ mDataPos = 0;
+ LOGV("setDataReference Setting data pos of %p to %d\n", this, mDataPos);
+ mObjects = const_cast<size_t*>(objects);
+ mObjectsSize = mObjectsCapacity = objectsCount;
+ mNextObjectHint = 0;
+ mOwner = relFunc;
+ mOwnerCookie = relCookie;
+ scanForFds();
+}
+
+void Parcel::print(TextOutput& to, uint32_t flags) const
+{
+ to << "Parcel(";
+
+ if (errorCheck() != NO_ERROR) {
+ const status_t err = errorCheck();
+ to << "Error: " << (void*)err << " \"" << strerror(-err) << "\"";
+ } else if (dataSize() > 0) {
+ const uint8_t* DATA = data();
+ to << indent << HexDump(DATA, dataSize()) << dedent;
+ const size_t* OBJS = objects();
+ const size_t N = objectsCount();
+ for (size_t i=0; i<N; i++) {
+ const flat_binder_object* flat
+ = reinterpret_cast<const flat_binder_object*>(DATA+OBJS[i]);
+ to << endl << "Object #" << i << " @ " << (void*)OBJS[i] << ": "
+ << TypeCode(flat->type & 0x7f7f7f00)
+ << " = " << flat->binder;
+ }
+ } else {
+ to << "NULL";
+ }
+
+ to << ")";
+}
+
+void Parcel::releaseObjects()
+{
+ const sp<ProcessState> proc(ProcessState::self());
+ size_t i = mObjectsSize;
+ uint8_t* const data = mData;
+ size_t* const objects = mObjects;
+ while (i > 0) {
+ i--;
+ const flat_binder_object* flat
+ = reinterpret_cast<flat_binder_object*>(data+objects[i]);
+ release_object(proc, *flat, this);
+ }
+}
+
+void Parcel::acquireObjects()
+{
+ const sp<ProcessState> proc(ProcessState::self());
+ size_t i = mObjectsSize;
+ uint8_t* const data = mData;
+ size_t* const objects = mObjects;
+ while (i > 0) {
+ i--;
+ const flat_binder_object* flat
+ = reinterpret_cast<flat_binder_object*>(data+objects[i]);
+ acquire_object(proc, *flat, this);
+ }
+}
+
+void Parcel::freeData()
+{
+ freeDataNoInit();
+ initState();
+}
+
+void Parcel::freeDataNoInit()
+{
+ if (mOwner) {
+ //LOGI("Freeing data ref of %p (pid=%d)\n", this, getpid());
+ mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie);
+ } else {
+ releaseObjects();
+ if (mData) free(mData);
+ if (mObjects) free(mObjects);
+ }
+}
+
+status_t Parcel::growData(size_t len)
+{
+ size_t newSize = ((mDataSize+len)*3)/2;
+ return (newSize <= mDataSize)
+ ? (status_t) NO_MEMORY
+ : continueWrite(newSize);
+}
+
+status_t Parcel::restartWrite(size_t desired)
+{
+ if (mOwner) {
+ freeData();
+ return continueWrite(desired);
+ }
+
+ uint8_t* data = (uint8_t*)realloc(mData, desired);
+ if (!data && desired > mDataCapacity) {
+ mError = NO_MEMORY;
+ return NO_MEMORY;
+ }
+
+ releaseObjects();
+
+ if (data) {
+ mData = data;
+ mDataCapacity = desired;
+ }
+
+ mDataSize = mDataPos = 0;
+ LOGV("restartWrite Setting data size of %p to %d\n", this, mDataSize);
+ LOGV("restartWrite Setting data pos of %p to %d\n", this, mDataPos);
+
+ free(mObjects);
+ mObjects = NULL;
+ mObjectsSize = mObjectsCapacity = 0;
+ mNextObjectHint = 0;
+ mHasFds = false;
+ mFdsKnown = true;
+
+ return NO_ERROR;
+}
+
+status_t Parcel::continueWrite(size_t desired)
+{
+ // If shrinking, first adjust for any objects that appear
+ // after the new data size.
+ size_t objectsSize = mObjectsSize;
+ if (desired < mDataSize) {
+ if (desired == 0) {
+ objectsSize = 0;
+ } else {
+ while (objectsSize > 0) {
+ if (mObjects[objectsSize-1] < desired)
+ break;
+ objectsSize--;
+ }
+ }
+ }
+
+ if (mOwner) {
+ // If the size is going to zero, just release the owner's data.
+ if (desired == 0) {
+ freeData();
+ return NO_ERROR;
+ }
+
+ // If there is a different owner, we need to take
+ // posession.
+ uint8_t* data = (uint8_t*)malloc(desired);
+ if (!data) {
+ mError = NO_MEMORY;
+ return NO_MEMORY;
+ }
+ size_t* objects = NULL;
+
+ if (objectsSize) {
+ objects = (size_t*)malloc(objectsSize*sizeof(size_t));
+ if (!objects) {
+ mError = NO_MEMORY;
+ return NO_MEMORY;
+ }
+
+ // Little hack to only acquire references on objects
+ // we will be keeping.
+ size_t oldObjectsSize = mObjectsSize;
+ mObjectsSize = objectsSize;
+ acquireObjects();
+ mObjectsSize = oldObjectsSize;
+ }
+
+ if (mData) {
+ memcpy(data, mData, mDataSize < desired ? mDataSize : desired);
+ }
+ if (objects && mObjects) {
+ memcpy(objects, mObjects, objectsSize*sizeof(size_t));
+ }
+ //LOGI("Freeing data ref of %p (pid=%d)\n", this, getpid());
+ mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie);
+ mOwner = NULL;
+
+ mData = data;
+ mObjects = objects;
+ mDataSize = (mDataSize < desired) ? mDataSize : desired;
+ LOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize);
+ mDataCapacity = desired;
+ mObjectsSize = mObjectsCapacity = objectsSize;
+ mNextObjectHint = 0;
+
+ } else if (mData) {
+ if (objectsSize < mObjectsSize) {
+ // Need to release refs on any objects we are dropping.
+ const sp<ProcessState> proc(ProcessState::self());
+ for (size_t i=objectsSize; i<mObjectsSize; i++) {
+ const flat_binder_object* flat
+ = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]);
+ if (flat->type == BINDER_TYPE_FD) {
+ // will need to rescan because we may have lopped off the only FDs
+ mFdsKnown = false;
+ }
+ release_object(proc, *flat, this);
+ }
+ size_t* objects =
+ (size_t*)realloc(mObjects, objectsSize*sizeof(size_t));
+ if (objects) {
+ mObjects = objects;
+ }
+ mObjectsSize = objectsSize;
+ mNextObjectHint = 0;
+ }
+
+ // We own the data, so we can just do a realloc().
+ if (desired > mDataCapacity) {
+ uint8_t* data = (uint8_t*)realloc(mData, desired);
+ if (data) {
+ mData = data;
+ mDataCapacity = desired;
+ } else if (desired > mDataCapacity) {
+ mError = NO_MEMORY;
+ return NO_MEMORY;
+ }
+ } else {
+ mDataSize = desired;
+ LOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize);
+ if (mDataPos > desired) {
+ mDataPos = desired;
+ LOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos);
+ }
+ }
+
+ } else {
+ // This is the first data. Easy!
+ uint8_t* data = (uint8_t*)malloc(desired);
+ if (!data) {
+ mError = NO_MEMORY;
+ return NO_MEMORY;
+ }
+
+ if(!(mDataCapacity == 0 && mObjects == NULL
+ && mObjectsCapacity == 0)) {
+ LOGE("continueWrite: %d/%p/%d/%d", mDataCapacity, mObjects, mObjectsCapacity, desired);
+ }
+
+ mData = data;
+ mDataSize = mDataPos = 0;
+ LOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize);
+ LOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos);
+ mDataCapacity = desired;
+ }
+
+ return NO_ERROR;
+}
+
+void Parcel::initState()
+{
+ mError = NO_ERROR;
+ mData = 0;
+ mDataSize = 0;
+ mDataCapacity = 0;
+ mDataPos = 0;
+ LOGV("initState Setting data size of %p to %d\n", this, mDataSize);
+ LOGV("initState Setting data pos of %p to %d\n", this, mDataPos);
+ mObjects = NULL;
+ mObjectsSize = 0;
+ mObjectsCapacity = 0;
+ mNextObjectHint = 0;
+ mHasFds = false;
+ mFdsKnown = true;
+ mOwner = NULL;
+}
+
+void Parcel::scanForFds() const
+{
+ bool hasFds = false;
+ for (size_t i=0; i<mObjectsSize; i++) {
+ const flat_binder_object* flat
+ = reinterpret_cast<const flat_binder_object*>(mData + mObjects[i]);
+ if (flat->type == BINDER_TYPE_FD) {
+ hasFds = true;
+ break;
+ }
+ }
+ mHasFds = hasFds;
+ mFdsKnown = true;
+}
+
+}; // namespace android