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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 "DataDirsAccess.h"
#include "FileSystem.h"
#include "System/Util.h"
#include "System/mmgr.h"
#include "System/Log/ILog.h"
CPoolArchiveFactory::CPoolArchiveFactory()
: IArchiveFactory("sdp")
{
}
IArchive* CPoolArchiveFactory::DoCreateArchive(const std::string& filePath) const
{
return new CPoolArchive(filePath);
}
static unsigned int parse_int32(unsigned char c[4])
{
unsigned int 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, (char*)buf, len) == len;
}
CPoolArchive::CPoolArchive(const std::string& name)
: CBufferedArchive(name)
, isOpen(false)
{
char c_name[255];
unsigned char c_md5[16];
unsigned char c_crc32[4];
unsigned char c_size[4];
unsigned char length;
gzFile in = gzopen(name.c_str(), "rb");
if (in == NULL) {
LOG_L(L_ERROR, "couldn't open %s", name.c_str());
return;
}
while (true) {
if (!gz_really_read(in, &length, 1)) {
if (gzeof(in)) {
isOpen = true;
}
break;
}
if (!gz_really_read(in, &c_name, length)) break;
if (!gz_really_read(in, &c_md5, 16)) break;
if (!gz_really_read(in, &c_crc32, 4)) break;
if (!gz_really_read(in, &c_size, 4)) break;
FileData* f = new FileData;
f->name = std::string(c_name, length);
std::memcpy(&f->md5, &c_md5, 16);
f->crc32 = parse_int32(c_crc32);
f->size = parse_int32(c_size);
files.push_back(f);
lcNameIndex[f->name] = files.size() - 1;
}
gzclose(in);
}
CPoolArchive::~CPoolArchive()
{
std::vector<FileData*>::iterator fi;
for (fi = files.begin(); fi < files.end(); ++fi) {
delete *fi;
}
}
bool CPoolArchive::IsOpen()
{
return isOpen;
}
unsigned int CPoolArchive::NumFiles() const
{
return files.size();
}
void CPoolArchive::FileInfo(unsigned int fid, std::string& name, int& size) const
{
assert(IsFileId(fid));
name = files[fid]->name;
size = files[fid]->size;
}
unsigned int CPoolArchive::GetCrc32(unsigned int fid)
{
assert(IsFileId(fid));
return files[fid]->crc32;
}
bool CPoolArchive::GetFileImpl(unsigned int fid, std::vector<boost::uint8_t>& buffer)
{
assert(IsFileId(fid));
FileData* f = files[fid];
char table[] = "0123456789abcdef";
char c_hex[32];
for (int i = 0; i < 16; ++i) {
c_hex[2 * i] = table[(f->md5[i] >> 4) & 0xf];
c_hex[2 * i + 1] = table[ f->md5[i] & 0xf];
}
std::string prefix(c_hex, 2);
std::string postfix(c_hex + 2, 30);
std::ostringstream accu;
accu << "pool/" << prefix << "/" << postfix << ".gz";
std::string rpath = accu.str();
FileSystem::FixSlashes(rpath);
std::string path = dataDirsAccess.LocateFile(rpath);
gzFile in = gzopen(path.c_str(), "rb");
if (in == NULL){
LOG_L(L_ERROR, "couldn't open %s", path.c_str());
return false;
}
unsigned int len = f->size;
buffer.resize(len);
int bytesread = (len == 0) ? 0 : gzread(in, (char *)&buffer[0], len);
gzclose(in);
if (bytesread != len) {
LOG_L(L_ERROR, "couldn't read %s", path.c_str());
buffer.clear();
return false;
}
return true;
}
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