blob: 3a5a30768b0dd3f2884b8b73dafe843674076749 [file] [log] [blame]
// Copyright 2017 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
#include "core/fxcrt/fx_stream.h"
#include <memory>
#include <utility>
#include "core/fxcrt/fileaccess_iface.h"
namespace {
class CFX_CRTFileStream final : public IFX_SeekableStream {
public:
CONSTRUCT_VIA_MAKE_RETAIN;
// IFX_SeekableStream:
FX_FILESIZE GetSize() override { return m_pFile->GetSize(); }
bool IsEOF() override { return GetPosition() >= GetSize(); }
FX_FILESIZE GetPosition() override { return m_pFile->GetPosition(); }
bool ReadBlockAtOffset(pdfium::span<uint8_t> buffer,
FX_FILESIZE offset) override {
return m_pFile->ReadPos(buffer, offset) > 0;
}
bool WriteBlock(pdfium::span<const uint8_t> buffer) override {
if (m_pFile->SetPosition(GetSize()) == static_cast<FX_FILESIZE>(-1)) {
return false;
}
return !!m_pFile->Write(buffer);
}
bool Flush() override { return m_pFile->Flush(); }
private:
explicit CFX_CRTFileStream(std::unique_ptr<FileAccessIface> pFA)
: m_pFile(std::move(pFA)) {}
~CFX_CRTFileStream() override = default;
std::unique_ptr<FileAccessIface> m_pFile;
};
} // namespace
bool IFX_WriteStream::WriteString(ByteStringView str) {
return WriteBlock(str.unsigned_span());
}
bool IFX_WriteStream::WriteByte(uint8_t byte) {
return WriteBlock(pdfium::byte_span_from_ref(byte));
}
bool IFX_WriteStream::WriteDWord(uint32_t i) {
char buf[20] = {};
FXSYS_itoa(i, buf, 10);
auto buf_span = pdfium::as_byte_span(buf);
return WriteBlock(buf_span.first(strlen(buf)));
}
bool IFX_WriteStream::WriteFilesize(FX_FILESIZE size) {
char buf[20] = {};
FXSYS_i64toa(size, buf, 10);
return WriteBlock(pdfium::as_writable_byte_span(buf).first(strlen(buf)));
}
// static
RetainPtr<IFX_SeekableReadStream> IFX_SeekableReadStream::CreateFromFilename(
const char* filename) {
std::unique_ptr<FileAccessIface> pFA = FileAccessIface::Create();
if (!pFA->Open(filename))
return nullptr;
return pdfium::MakeRetain<CFX_CRTFileStream>(std::move(pFA));
}
bool IFX_SeekableReadStream::IsEOF() {
return false;
}
FX_FILESIZE IFX_SeekableReadStream::GetPosition() {
return 0;
}