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#include <util/memory/tempbuf.h>
#include <util/system/align.h>
#include "multiblob_builder.h"
/*
* TBlobSaverMemory
*/
TBlobSaverMemory::TBlobSaverMemory(const void* ptr, size_t size)
: Blob(TBlob::NoCopy(ptr, size))
{
}
TBlobSaverMemory::TBlobSaverMemory(const TBlob& blob)
: Blob(blob)
{
}
void TBlobSaverMemory::Save(IOutputStream& output, ui32 /*flags*/) {
output.Write((void*)Blob.Data(), Blob.Length());
}
size_t TBlobSaverMemory::GetLength() {
return Blob.Length();
}
/*
* TBlobSaverFile
*/
TBlobSaverFile::TBlobSaverFile(TFile file)
: File(file)
{
Y_ASSERT(File.IsOpen());
}
TBlobSaverFile::TBlobSaverFile(const char* filename, EOpenMode oMode)
: File(filename, oMode)
{
Y_ASSERT(File.IsOpen());
}
void TBlobSaverFile::Save(IOutputStream& output, ui32 /*flags*/) {
TTempBuf buffer(1 << 20);
while (size_t size = File.Read((void*)buffer.Data(), buffer.Size()))
output.Write((void*)buffer.Data(), size);
}
size_t TBlobSaverFile::GetLength() {
return File.GetLength();
}
/*
* TMultiBlobBuilder
*/
TMultiBlobBuilder::TMultiBlobBuilder(bool isOwn)
: IsOwner(isOwn)
{
}
TMultiBlobBuilder::~TMultiBlobBuilder() {
if (IsOwner)
DeleteSubBlobs();
}
namespace {
ui64 PadToAlign(IOutputStream& output, ui64 fromPos, ui32 align) {
ui64 toPos = AlignUp<ui64>(fromPos, align);
for (; fromPos < toPos; ++fromPos) {
output << (char)0;
}
return toPos;
}
}
void TMultiBlobBuilder::Save(IOutputStream& output, ui32 flags) {
TMultiBlobHeader header;
memset((void*)&header, 0, sizeof(header));
header.BlobMetaSig = BLOBMETASIG;
header.BlobRecordSig = TMultiBlobHeader::RecordSig;
header.Count = Blobs.size();
header.Align = ALIGN;
header.Flags = flags & EMF_WRITEABLE;
output.Write((void*)&header, sizeof(header));
for (size_t i = sizeof(header); i < header.HeaderSize(); ++i)
output << (char)0;
ui64 pos = header.HeaderSize();
if (header.Flags & EMF_INTERLAY) {
for (size_t i = 0; i < Blobs.size(); ++i) {
ui64 size = Blobs[i]->GetLength();
pos = PadToAlign(output, pos, sizeof(ui64)); // Align size record
output.Write((void*)&size, sizeof(ui64));
pos = PadToAlign(output, pos + sizeof(ui64), header.Align); // Align blob
Blobs[i]->Save(output, header.Flags);
pos += size;
}
} else {
for (size_t i = 0; i < Blobs.size(); ++i) {
ui64 size = Blobs[i]->GetLength();
output.Write((void*)&size, sizeof(ui64));
}
pos += Blobs.size() * sizeof(ui64);
for (size_t i = 0; i < Blobs.size(); ++i) {
pos = PadToAlign(output, pos, header.Align);
Blobs[i]->Save(output, header.Flags);
pos += Blobs[i]->GetLength();
}
}
// Compensate for imprecise size
for (ui64 len = GetLength(); pos < len; ++pos) {
output << (char)0;
}
}
size_t TMultiBlobBuilder::GetLength() {
// Sizes may be diferent with and without EMF_INTERLAY, so choose greater of 2
size_t resNonInter = TMultiBlobHeader::HeaderSize() + Blobs.size() * sizeof(ui64);
size_t resInterlay = TMultiBlobHeader::HeaderSize();
for (size_t i = 0; i < Blobs.size(); ++i) {
resInterlay = AlignUp<ui64>(resInterlay, sizeof(ui64)) + sizeof(ui64);
resInterlay = AlignUp<ui64>(resInterlay, ALIGN) + Blobs[i]->GetLength();
resNonInter = AlignUp<ui64>(resNonInter, ALIGN) + Blobs[i]->GetLength();
}
resInterlay = AlignUp<ui64>(resInterlay, ALIGN);
resNonInter = AlignUp<ui64>(resNonInter, ALIGN);
return Max(resNonInter, resInterlay);
}
TMultiBlobBuilder::TSavers& TMultiBlobBuilder::GetBlobs() {
return Blobs;
}
const TMultiBlobBuilder::TSavers& TMultiBlobBuilder::GetBlobs() const {
return Blobs;
}
void TMultiBlobBuilder::AddBlob(IBlobSaverBase* blob) {
Blobs.push_back(blob);
}
void TMultiBlobBuilder::DeleteSubBlobs() {
for (size_t i = 0; i < Blobs.size(); ++i)
delete Blobs[i];
Blobs.clear();
}
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