947531a6a9
Merge from Widevine repo of http://go/wvgerrit/46204 Refactor utility code - split the mock, step 1 Merge from Widevine repo of http://go/wvgerrit/46205 Move some OEMCrypto types to common header - split the mock, step 2 Merge from Widevine repo of http://go/wvgerrit/46206 Split mock into two -- step 3 Merge from Widevine repo of http://go/wvgerrit/47460 Split the mock into two -- step 3.5 The CL moves several files used by oemcrypto and cdm into a common subdirectory, so that it may more easily be shared with partners. The CORE_DISALLOW_COPY_AND_ASSIGN macro was moved to its own header in the util/include directory. This CL removes some references to the mock from other code, and puts some constants and types, such as the definition of the keybox, into a header in oemcrypto. Test: tested as part of http://go/ag/4674759 bug: 76393338 Change-Id: I75b4bde7062ed8ee572c97ebc2f4da018f4be0c9
73 lines
2.2 KiB
C++
73 lines
2.2 KiB
C++
// Copyright 2018 Google LLC. All Rights Reserved. This file and proprietary
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// source code may only be used and distributed under the Widevine Master
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// License Agreement.
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#ifndef WVCDM_CORE_BUFFER_READER_H_
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#define WVCDM_CORE_BUFFER_READER_H_
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#include <stdint.h>
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#include <string>
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#include <vector>
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#include "disallow_copy_and_assign.h"
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namespace wvcdm {
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// Annotate a function indicating the caller must examine the return value.
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// Use like:
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// int foo() WARN_UNUSED_RESULT;
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// To explicitly ignore a result, see |ignore_result()| in <base/basictypes.h>.
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#if defined(COMPILER_GCC)
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#define WARN_UNUSED_RESULT __attribute__((warn_unused_result))
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#else
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#define WARN_UNUSED_RESULT
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#endif
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class BufferReader {
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public:
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BufferReader(const uint8_t* buf, size_t size)
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: buf_(buf), size_(buf != NULL ? size : 0), pos_(0) {}
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bool HasBytes(size_t count) const { return pos_ + count <= size_; }
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bool IsEOF() const { return pos_ >= size_; }
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// Read a value from the stream, performing endian correction,
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// and advance the stream pointer.
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bool Read1(uint8_t* v) WARN_UNUSED_RESULT;
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bool Read2(uint16_t* v) WARN_UNUSED_RESULT;
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bool Read2s(int16_t* v) WARN_UNUSED_RESULT;
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bool Read4(uint32_t* v) WARN_UNUSED_RESULT;
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bool Read4s(int32_t* v) WARN_UNUSED_RESULT;
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bool Read8(uint64_t* v) WARN_UNUSED_RESULT;
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bool Read8s(int64_t* v) WARN_UNUSED_RESULT;
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bool ReadString(std::string* str, size_t count) WARN_UNUSED_RESULT;
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bool ReadVec(std::vector<uint8_t>* t, size_t count) WARN_UNUSED_RESULT;
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// These variants read a 4-byte integer of the corresponding signedness and
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// store it in the 8-byte return type.
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bool Read4Into8(uint64_t* v) WARN_UNUSED_RESULT;
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bool Read4sInto8s(int64_t* v) WARN_UNUSED_RESULT;
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// Advance the stream by this many bytes.
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bool SkipBytes(size_t nbytes) WARN_UNUSED_RESULT;
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const uint8_t* data() const { return buf_; }
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size_t size() const { return size_; }
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size_t pos() const { return pos_; }
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protected:
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const uint8_t* buf_;
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size_t size_;
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size_t pos_;
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template <typename T>
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bool Read(T* t) WARN_UNUSED_RESULT;
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CORE_DISALLOW_COPY_AND_ASSIGN(BufferReader);
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};
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} // namespace wvcdm
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#endif // WVCDM_CORE_BUFFER_READER_H_
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