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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "PoolArchive.h"
#include <algorithm>
#include <stdexcept>
#include <sstream>
#include <string>
#include <cstring>
#include <iostream>
#include <assert.h>
#include "System/FileSystem/DataDirsAccess.h"
#include "System/FileSystem/FileSystem.h"
#include "System/Exceptions.h"
#include "System/StringUtil.h"
#include "System/Log/ILog.h"
CPoolArchiveFactory::CPoolArchiveFactory(): IArchiveFactory("sdp")
{
}
IArchive* CPoolArchiveFactory::DoCreateArchive(const std::string& filePath) const
{
return new CPoolArchive(filePath);
}
static uint32_t parse_uint32(uint8_t c[4])
{
uint32_t i = 0;
i = c[0] << 24 | i;
i = c[1] << 16 | i;
i = c[2] << 8 | i;
i = c[3] << 0 | i;
return i;
}
static bool gz_really_read(gzFile file, voidp buf, unsigned int len)
{
return (gzread(file, reinterpret_cast<char*>(buf), len) == len);
}
CPoolArchive::CPoolArchive(const std::string& name): CBufferedArchive(name)
{
char c_name[255];
uint8_t c_md5sum[16];
uint8_t c_crc32[4];
uint8_t c_size[4];
uint8_t length;
gzFile in = gzopen(name.c_str(), "rb");
if (in == nullptr)
throw content_error("[" + std::string(__func__) + "] could not open " + name);
files.reserve(1024);
stats.reserve(1024);
while (gz_really_read(in, &length, 1)) {
if (!gz_really_read(in, &c_name, length)) break;
if (!gz_really_read(in, &c_md5sum, 16)) break;
if (!gz_really_read(in, &c_crc32, 4)) break;
if (!gz_really_read(in, &c_size, 4)) break;
files.emplace_back();
stats.emplace_back();
FileData& f = files.back();
FileStat& s = stats.back();
f.name = std::move(std::string(c_name, length));
std::memcpy(&f.md5sum, &c_md5sum, 16);
f.crc32 = parse_uint32(c_crc32);
f.size = parse_uint32(c_size);
s.fileIndx = files.size() - 1;
s.readTime = 0;
lcNameIndex[f.name] = files.size() - 1;
}
isOpen = gzeof(in);
gzclose(in);
}
CPoolArchive::~CPoolArchive()
{
const std::string& name = GetArchiveName();
const std::pair<uint64_t, uint64_t>& sums = GetSums();
const unsigned long numZipFiles = files.size();
const unsigned long sumInflSize = sums.first / 1024;
const unsigned long sumReadTime = sums.second / (1000 * 1000);
LOG_L(L_INFO, "[%s] name=\"%s\" numZipFiles=%lu sumInflSize=%lukb sumReadTime=%lums", __func__, name.c_str(), numZipFiles, sumInflSize, sumReadTime);
std::partial_sort(stats.begin(), stats.begin() + std::min(stats.size(), size_t(10)), stats.end());
// show top-10 worst access times
for (size_t n = 0; n < std::min(stats.size(), size_t(10)); n++) {
const FileStat& s = stats[n];
const FileData& f = files[s.fileIndx];
const unsigned long indx = s.fileIndx;
const unsigned long time = s.readTime / (1000 * 1000);
LOG_L(L_INFO, "\tfile=\"%s\" indx=%lu inflSize=%ukb readTime=%lums", f.name.c_str(), indx, f.size / 1024, time);
}
}
bool CPoolArchive::GetFileImpl(unsigned int fid, std::vector<std::uint8_t>& buffer)
{
assert(IsFileId(fid));
FileData* f = &files[fid];
FileStat* s = &stats[fid];
constexpr const char table[] = "0123456789abcdef";
char c_hex[32];
for (int i = 0; i < 16; ++i) {
c_hex[2 * i ] = table[(f->md5sum[i] >> 4) & 0xf];
c_hex[2 * i + 1] = table[ f->md5sum[i] & 0xf];
}
const std::string prefix(c_hex, 2);
const std::string postfix(c_hex + 2, 30);
std::string rpath = "pool/" + prefix + "/" + postfix + ".gz";
const std::string path = dataDirsAccess.LocateFile(FileSystem::FixSlashes(rpath));
const spring_time startTime = spring_now();
gzFile in = gzopen(path.c_str(), "rb");
if (in == nullptr)
return false;
buffer.clear();
buffer.resize(f->size);
const int bytesRead = (buffer.empty()) ? 0 : gzread(in, reinterpret_cast<char*>(buffer.data()), f->size);
gzclose(in);
s->readTime = (spring_now() - startTime).toNanoSecsi();
if (bytesRead != buffer.size()) {
LOG_L(L_ERROR, "[PoolArchive::%s] could not read file \"%s\"", __func__, path.c_str());
buffer.clear();
return false;
}
return true;
}
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