| // Copyright 2014 The PDFium Authors |
| // 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_FX_STREAM_H_ |
| #define CORE_FXCRT_FX_STREAM_H_ |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include "core/fxcrt/bytestring.h" |
| #include "core/fxcrt/fx_types.h" |
| #include "core/fxcrt/retain_ptr.h" |
| #include "core/fxcrt/span.h" |
| |
| class IFX_WriteStream { |
| public: |
| // When `size` is 0, treat it as a no-op and return true. |
| virtual bool WriteBlock(pdfium::span<const uint8_t> data) = 0; |
| |
| bool WriteString(ByteStringView str); |
| bool WriteByte(uint8_t byte); |
| bool WriteDWord(uint32_t i); |
| bool WriteFilesize(FX_FILESIZE size); |
| |
| protected: |
| virtual ~IFX_WriteStream() = default; |
| }; |
| |
| class IFX_ArchiveStream : public IFX_WriteStream { |
| public: |
| virtual FX_FILESIZE CurrentOffset() const = 0; |
| }; |
| |
| class IFX_StreamWithSize { |
| public: |
| virtual FX_FILESIZE GetSize() = 0; |
| }; |
| |
| class IFX_RetainableWriteStream : virtual public Retainable, |
| public IFX_WriteStream {}; |
| |
| class IFX_SeekableWriteStream : virtual public IFX_StreamWithSize, |
| public IFX_RetainableWriteStream { |
| public: |
| virtual bool Flush() = 0; |
| }; |
| |
| class IFX_SeekableReadStream : virtual public Retainable, |
| virtual public IFX_StreamWithSize { |
| public: |
| static RetainPtr<IFX_SeekableReadStream> CreateFromFilename( |
| const char* filename); |
| |
| virtual bool IsEOF(); |
| virtual FX_FILESIZE GetPosition(); |
| [[nodiscard]] virtual bool ReadBlockAtOffset(pdfium::span<uint8_t> buffer, |
| FX_FILESIZE offset) = 0; |
| }; |
| |
| class IFX_SeekableStream : public IFX_SeekableReadStream, |
| public IFX_SeekableWriteStream { |
| }; |
| |
| #endif // CORE_FXCRT_FX_STREAM_H_ |