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-rw-r--r--core/fxcrt/cfx_seekablemultistream.cpp85
-rw-r--r--core/fxcrt/cfx_seekablemultistream.h36
-rw-r--r--core/fxcrt/cfx_seekablemultistream_unittest.cpp85
3 files changed, 206 insertions, 0 deletions
diff --git a/core/fxcrt/cfx_seekablemultistream.cpp b/core/fxcrt/cfx_seekablemultistream.cpp
new file mode 100644
index 0000000000..12682d7678
--- /dev/null
+++ b/core/fxcrt/cfx_seekablemultistream.cpp
@@ -0,0 +1,85 @@
+// Copyright 2017 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/fxcrt/cfx_seekablemultistream.h"
+
+#include <algorithm>
+
+#include "core/fpdfapi/parser/cpdf_stream_acc.h"
+#include "third_party/base/logging.h"
+#include "third_party/base/stl_util.h"
+
+CFX_SeekableMultiStream::CFX_SeekableMultiStream(
+ const std::vector<CPDF_Stream*>& streams) {
+ for (CPDF_Stream* pStream : streams) {
+ m_Data.push_back(pdfium::MakeRetain<CPDF_StreamAcc>(pStream));
+ m_Data.back()->LoadAllData();
+ }
+}
+
+CFX_SeekableMultiStream::~CFX_SeekableMultiStream() {}
+
+FX_FILESIZE CFX_SeekableMultiStream::GetSize() {
+ uint32_t dwSize = 0;
+ for (const auto& acc : m_Data)
+ dwSize += acc->GetSize();
+ return dwSize;
+}
+
+bool CFX_SeekableMultiStream::ReadBlock(void* buffer,
+ FX_FILESIZE offset,
+ size_t size) {
+ int32_t iCount = pdfium::CollectionSize<int32_t>(m_Data);
+ int32_t index = 0;
+ while (index < iCount) {
+ const auto& acc = m_Data[index];
+ FX_FILESIZE dwSize = acc->GetSize();
+ if (offset < dwSize)
+ break;
+
+ offset -= dwSize;
+ index++;
+ }
+ while (index < iCount) {
+ const auto& acc = m_Data[index];
+ uint32_t dwSize = acc->GetSize();
+ size_t dwRead = std::min(size, static_cast<size_t>(dwSize - offset));
+ memcpy(buffer, acc->GetData() + offset, dwRead);
+ size -= dwRead;
+ if (size == 0)
+ return true;
+
+ buffer = static_cast<uint8_t*>(buffer) + dwRead;
+ offset = 0;
+ index++;
+ }
+ return false;
+}
+
+size_t CFX_SeekableMultiStream::ReadBlock(void* buffer, size_t size) {
+ NOTREACHED();
+ return 0;
+}
+
+FX_FILESIZE CFX_SeekableMultiStream::GetPosition() {
+ return 0;
+}
+
+bool CFX_SeekableMultiStream::IsEOF() {
+ return false;
+}
+
+bool CFX_SeekableMultiStream::Flush() {
+ NOTREACHED();
+ return false;
+}
+
+bool CFX_SeekableMultiStream::WriteBlock(const void* pData,
+ FX_FILESIZE offset,
+ size_t size) {
+ NOTREACHED();
+ return false;
+}
diff --git a/core/fxcrt/cfx_seekablemultistream.h b/core/fxcrt/cfx_seekablemultistream.h
new file mode 100644
index 0000000000..9138d7c321
--- /dev/null
+++ b/core/fxcrt/cfx_seekablemultistream.h
@@ -0,0 +1,36 @@
+// Copyright 2017 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef CORE_FXCRT_CFX_SEEKABLEMULTISTREAM_H_
+#define CORE_FXCRT_CFX_SEEKABLEMULTISTREAM_H_
+
+#include <vector>
+
+#include "core/fxcrt/fx_stream.h"
+#include "core/fxcrt/retain_ptr.h"
+
+class CPDF_Stream;
+class CPDF_StreamAcc;
+
+class CFX_SeekableMultiStream : public IFX_SeekableStream {
+ public:
+ explicit CFX_SeekableMultiStream(const std::vector<CPDF_Stream*>& streams);
+ ~CFX_SeekableMultiStream() override;
+
+ // IFX_SeekableReadStream
+ FX_FILESIZE GetPosition() override;
+ FX_FILESIZE GetSize() override;
+ bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override;
+ size_t ReadBlock(void* buffer, size_t size) override;
+ bool IsEOF() override;
+ bool Flush() override;
+ bool WriteBlock(const void* pData, FX_FILESIZE offset, size_t size) override;
+
+ private:
+ std::vector<RetainPtr<CPDF_StreamAcc>> m_Data;
+};
+
+#endif // CORE_FXCRT_CFX_SEEKABLEMULTISTREAM_H_
diff --git a/core/fxcrt/cfx_seekablemultistream_unittest.cpp b/core/fxcrt/cfx_seekablemultistream_unittest.cpp
new file mode 100644
index 0000000000..89213b13af
--- /dev/null
+++ b/core/fxcrt/cfx_seekablemultistream_unittest.cpp
@@ -0,0 +1,85 @@
+// Copyright 2016 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "core/fxcrt/cfx_seekablemultistream.h"
+
+#include <memory>
+#include <vector>
+
+#include "core/fpdfapi/parser/cpdf_dictionary.h"
+#include "core/fpdfapi/parser/cpdf_stream.h"
+#include "core/fxcrt/fx_memory.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/test_support.h"
+#include "third_party/base/ptr_util.h"
+
+TEST(CFX_SeekableMultiStreamTest, NoStreams) {
+ std::vector<CPDF_Stream*> streams;
+ auto fileread = pdfium::MakeRetain<CFX_SeekableMultiStream>(streams);
+
+ uint8_t output_buffer[16];
+ memset(output_buffer, 0xbd, sizeof(output_buffer));
+ EXPECT_FALSE(fileread->ReadBlock(output_buffer, 0, 0));
+ EXPECT_EQ(0xbd, output_buffer[0]);
+}
+
+TEST(CXFAFileReadTest, EmptyStreams) {
+ std::vector<CPDF_Stream*> streams;
+ auto stream1 = pdfium::MakeUnique<CPDF_Stream>();
+ streams.push_back(stream1.get());
+ auto fileread = pdfium::MakeRetain<CFX_SeekableMultiStream>(streams);
+
+ uint8_t output_buffer[16];
+ memset(output_buffer, 0xbd, sizeof(output_buffer));
+ EXPECT_FALSE(fileread->ReadBlock(output_buffer, 0, 0));
+ EXPECT_EQ(0xbd, output_buffer[0]);
+}
+
+TEST(CXFAFileReadTest, NormalStreams) {
+ std::vector<CPDF_Stream*> streams;
+ auto stream1 = pdfium::MakeUnique<CPDF_Stream>();
+ auto stream2 = pdfium::MakeUnique<CPDF_Stream>();
+ auto stream3 = pdfium::MakeUnique<CPDF_Stream>();
+
+ // 16 chars total.
+ stream1->InitStream(reinterpret_cast<const uint8_t*>("one t"), 5,
+ pdfium::MakeUnique<CPDF_Dictionary>());
+ stream2->InitStream(reinterpret_cast<const uint8_t*>("wo "), 3,
+ pdfium::MakeUnique<CPDF_Dictionary>());
+ stream3->InitStream(reinterpret_cast<const uint8_t*>("three!!!"), 8,
+ pdfium::MakeUnique<CPDF_Dictionary>());
+
+ streams.push_back(stream1.get());
+ streams.push_back(stream2.get());
+ streams.push_back(stream3.get());
+ auto fileread = pdfium::MakeRetain<CFX_SeekableMultiStream>(streams);
+
+ uint8_t output_buffer[16];
+ memset(output_buffer, 0xbd, sizeof(output_buffer));
+ EXPECT_TRUE(fileread->ReadBlock(output_buffer, 0, 0));
+ EXPECT_EQ(0xbd, output_buffer[0]);
+
+ memset(output_buffer, 0xbd, sizeof(output_buffer));
+ EXPECT_TRUE(fileread->ReadBlock(output_buffer, 1, 0));
+ EXPECT_EQ(0xbd, output_buffer[0]);
+
+ memset(output_buffer, 0xbd, sizeof(output_buffer));
+ EXPECT_TRUE(fileread->ReadBlock(output_buffer, 0, 1));
+ EXPECT_EQ(0, memcmp(output_buffer, "o", 1));
+ EXPECT_EQ(0xbd, output_buffer[1]);
+
+ memset(output_buffer, 0xbd, sizeof(output_buffer));
+ EXPECT_TRUE(fileread->ReadBlock(output_buffer, 0, sizeof(output_buffer)));
+ EXPECT_EQ(0, memcmp(output_buffer, "one two three!!!", 16));
+
+ memset(output_buffer, 0xbd, sizeof(output_buffer));
+ EXPECT_TRUE(fileread->ReadBlock(output_buffer, 2, 10));
+ EXPECT_EQ(0, memcmp(output_buffer, "e two thre", 10));
+ EXPECT_EQ(0xbd, output_buffer[11]);
+
+ memset(output_buffer, 0xbd, sizeof(output_buffer));
+ EXPECT_FALSE(fileread->ReadBlock(output_buffer, 1, sizeof(output_buffer)));
+ EXPECT_EQ(0, memcmp(output_buffer, "ne two three!!!", 15));
+ EXPECT_EQ(0xbd, output_buffer[15]);
+}
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