Revert^2 "Move some image/9patch code to androidfw"
This reverts commit 917043bc2586743afda5a21386893fa8c787800b.
Reason for revert: Roll forward with fix
Test: Automatic
Bug: 296324826
Change-Id: I42a0b48c02fd497b2174c0c65f300265202f7ab1
diff --git a/libs/androidfw/BigBufferStream.cpp b/libs/androidfw/BigBufferStream.cpp
new file mode 100644
index 0000000..f18199c
--- /dev/null
+++ b/libs/androidfw/BigBufferStream.cpp
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+#include "androidfw/BigBufferStream.h"
+
+#include <algorithm>
+
+namespace android {
+
+//
+// BigBufferInputStream
+//
+
+bool BigBufferInputStream::Next(const void** data, size_t* size) {
+ if (iter_ == buffer_->end()) {
+ return false;
+ }
+
+ if (offset_ == iter_->size) {
+ ++iter_;
+ if (iter_ == buffer_->end()) {
+ return false;
+ }
+ offset_ = 0;
+ }
+
+ *data = iter_->buffer.get() + offset_;
+ *size = iter_->size - offset_;
+ bytes_read_ += iter_->size - offset_;
+ offset_ = iter_->size;
+ return true;
+}
+
+void BigBufferInputStream::BackUp(size_t count) {
+ if (count > offset_) {
+ bytes_read_ -= offset_;
+ offset_ = 0;
+ } else {
+ offset_ -= count;
+ bytes_read_ -= count;
+ }
+}
+
+bool BigBufferInputStream::CanRewind() const {
+ return true;
+}
+
+bool BigBufferInputStream::Rewind() {
+ iter_ = buffer_->begin();
+ offset_ = 0;
+ bytes_read_ = 0;
+ return true;
+}
+
+size_t BigBufferInputStream::ByteCount() const {
+ return bytes_read_;
+}
+
+bool BigBufferInputStream::HadError() const {
+ return false;
+}
+
+size_t BigBufferInputStream::TotalSize() const {
+ return buffer_->size();
+}
+
+bool BigBufferInputStream::ReadFullyAtOffset(void* data, size_t byte_count, off64_t offset) {
+ if (byte_count == 0) {
+ return true;
+ }
+ if (offset < 0) {
+ return false;
+ }
+ if (offset > std::numeric_limits<off64_t>::max() - byte_count) {
+ return false;
+ }
+ if (offset + byte_count > buffer_->size()) {
+ return false;
+ }
+ auto p = reinterpret_cast<uint8_t*>(data);
+ for (auto iter = buffer_->begin(); iter != buffer_->end() && byte_count > 0; ++iter) {
+ if (offset < iter->size) {
+ size_t to_read = std::min(byte_count, (size_t)(iter->size - offset));
+ memcpy(p, iter->buffer.get() + offset, to_read);
+ byte_count -= to_read;
+ p += to_read;
+ offset = 0;
+ } else {
+ offset -= iter->size;
+ }
+ }
+ return byte_count == 0;
+}
+
+//
+// BigBufferOutputStream
+//
+
+bool BigBufferOutputStream::Next(void** data, size_t* size) {
+ *data = buffer_->NextBlock(size);
+ return true;
+}
+
+void BigBufferOutputStream::BackUp(size_t count) {
+ buffer_->BackUp(count);
+}
+
+size_t BigBufferOutputStream::ByteCount() const {
+ return buffer_->size();
+}
+
+bool BigBufferOutputStream::HadError() const {
+ return false;
+}
+
+} // namespace android