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new Stream for StreamView

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This commit is contained in:
Ivan Morozov
2022-08-03 17:23:53 +03:00
parent ad10681ba0
commit 58f2b9d3f0
12 changed files with 161 additions and 129 deletions
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35
Common/cppcf/streamview.cpp
View File

@ -10,7 +10,7 @@ StreamView::StreamView(const SVector<Sector> &sectorChain, int sectorSize, Strea
// if (sectorChain == null)
// throw CFException("Sector Chain cannot be null");
auto pos = stream->tellg();
auto pos = stream->tell();
if (sectorSize <= 0)
throw CFException("Sector size must be greater than zero");
}
@ -24,10 +24,16 @@ StreamView::StreamView(const SVector<Sector> &sectorChain, int sectorSize, std::
}
void StreamView::Write(const char *buffer, std::streamsize offset, std::streamsize count)
std::streamsize StreamView::tell()
{
return position;
}
void StreamView::write(const char *buffer, std::streamsize count)
{
int byteWritten = 0;
int roundByteWritten = 0;
int offset = 0;
// Assure length
if ((position + count) > length)
@ -84,10 +90,17 @@ void StreamView::Write(const char *buffer, std::streamsize offset, std::streamsi
}
}
std::streamsize StreamView::Read(char *buffer, std::streamsize offset, std::streamsize count)
void StreamView::close()
{
if (std::dynamic_pointer_cast<std::iostream>(stream) != nullptr)
stream->close();
}
std::streamsize StreamView::read(char *buffer, std::streamsize len)
{
int nRead = 0;
int nToRead = 0;
int offset = 0;
if (sectorChain.empty() == false && sectorChain.size() > 0)
{
// First sector
@ -96,7 +109,7 @@ std::streamsize StreamView::Read(char *buffer, std::streamsize offset, std::stre
// Bytes to read count is the min between request count
// and sector border
nToRead = std::min((int)sectorChain[0]->GetData().size() - ((int)position % sectorSize), (int)count);
nToRead = std::min((int)sectorChain[0]->GetData().size() - ((int)position % sectorSize), (int)len);
if (secIndex < (int)sectorChain.size())
{
@ -110,7 +123,7 @@ std::streamsize StreamView::Read(char *buffer, std::streamsize offset, std::stre
secIndex++;
// Central sectors
while (nRead < (count - sectorSize))
while (nRead < (len - sectorSize))
{
nToRead = sectorSize;
char* src = reinterpret_cast<char*>(sectorChain[secIndex]->GetData().data());
@ -122,7 +135,7 @@ std::streamsize StreamView::Read(char *buffer, std::streamsize offset, std::stre
}
// Last sector
nToRead = count - nRead;
nToRead = len - nRead;
if (nToRead != 0)
{
@ -143,9 +156,9 @@ std::streamsize StreamView::Read(char *buffer, std::streamsize offset, std::stre
return 0;
}
std::streamsize StreamView::Seek(std::streamsize offset, int origin)
std::streamsize StreamView::seek(std::streamsize offset, std::ios_base::seekdir mode)
{
switch (origin)
switch (mode)
{
case std::ios_base::beg:
position = offset;
@ -156,8 +169,8 @@ std::streamsize StreamView::Seek(std::streamsize offset, int origin)
break;
case std::ios_base::end:
default:
position = length - offset;
break;
}
adjustLength(position);
@ -172,14 +185,14 @@ void StreamView::SetLength(std::streamsize value)
int StreamView::ReadInt32()
{
Read(reinterpret_cast<char*>(&buf), 0, 4);
read(reinterpret_cast<char*>(&buf), 4);
return buf;
}
void StreamView::WriteInt32(int val)
{
buf = ((val & 0xFF) << 24) | ((val & 0x00FF) << 16) | ((val & 0x0000FF) << 8) | (val & 0x000000FF);
Write(reinterpret_cast<char*>(&buf), 0, 4);
write(reinterpret_cast<char*>(&buf), 4);
}
void StreamView::adjustLength(std::streamsize value)