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#include "CondFormats/Common/interface/MultiFileBlob.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include <iostream>
#include <zlib.h>
MultiFileBlob::MultiFileBlob() : compressed(false), isize(0), expanded(false) {}
MultiFileBlob::~MultiFileBlob() {}
void MultiFileBlob::finalized(bool compress) {
if (!compress)
return;
if (0 == isize)
return;
compressed = true;
expanded = false;
std::vector<unsigned char> out(isize);
uLongf destLen = compressBound(isize);
int zerr = compress2(&out.front(), &destLen, &blob.front(), isize, 9);
if (zerr != 0)
edm::LogError("MultiFileBlob") << "Compression error " << zerr;
out.resize(destLen);
blob.swap(out);
}
void MultiFileBlob::read(const std::string& name, std::istream& is) {
Positions::const_iterator pos = positions.find(name);
if (pos != positions.end()) {
edm::LogError("MultiFileBlob:") << name << "already in this object";
return;
}
positions[name] = isize;
char c;
while (is.get(c))
blob.push_back((unsigned char)c);
isize = blob.size();
}
void MultiFileBlob::write(const std::string& name, std::ostream& os) const {
Range r = rawBlob(name);
os.write((const char*)(r.first), r.second - r.first);
}
MultiFileBlob::Range MultiFileBlob::rawBlob(const std::string& name) const {
const_cast<MultiFileBlob*>(this)->expand();
Positions::const_iterator pos = positions.find(name);
if (pos == positions.end()) {
edm::LogError("MultiFileBlob:") << name << "not in this object";
return Range(nullptr, nullptr);
}
unsigned long long b = (*pos).second;
unsigned long long e = isize;
pos++;
if (pos != positions.end())
e = (*pos).second;
return Range(&blob[b], &blob[e]);
}
unsigned long long MultiFileBlob::size(const std::string& name) const {
Range r = rawBlob(name);
return r.second - r.first;
}
void MultiFileBlob::expand() {
if (expanded)
return;
if (!compressed) {
expanded = true;
return;
}
std::vector<unsigned char> out(isize);
uLongf destLen = out.size();
int zerr = uncompress(&out.front(), &destLen, &blob.front(), blob.size());
if (zerr != 0 || out.size() != destLen)
edm::LogError("FileBlob") << "uncompressing error " << zerr << " original size was " << isize << " new size is "
<< destLen;
blob.swap(out);
expanded = true;
}
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