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#include "StdAfx.h"
#include "ArchivePool.h"
#include "FileSystem.h"
#include <algorithm>
#include <stdexcept>
#include "Util.h"
#include "mmgr.h"
#include "LogOutput.h"
#include <sstream>
#include <string>
#include <cstring>
#include <iostream>
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 len)
{
unsigned offset = 0;
while (true) {
int i = gzread(file, ((char *)buf)+offset, len-offset);
if (i == -1) return false;
offset += i;
if (offset == len) return true;
}
}
CArchivePool::CArchivePool(const std::string& name):
CArchiveBuffered(name),
isOpen(false)
{
char c_name[255];
unsigned char c_md5[16];
unsigned char c_crc32[4];
unsigned char c_size[4];
gzFile in = gzopen (name.c_str(), "rb");
if (in == NULL) {
LogObject() << "Error opening " << name;
return;
}
while (true) {
if (gzeof(in)) {
isOpen = true;
break;
}
int length = gzgetc(in);
if (length == -1) 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);
fileMap[f->name] = f;
}
gzclose(in);
}
CArchivePool::~CArchivePool(void)
{
std::vector<FileData *>::iterator i = files.begin();
for(; i < files.end(); i++) delete *i;
}
unsigned int CArchivePool::GetCrc32 (const std::string& fileName)
{
std::string lower = StringToLower(fileName);
FileData *f = fileMap[lower];
return f->crc32;
}
bool CArchivePool::IsOpen()
{
return isOpen;
}
ABOpenFile_t* CArchivePool::GetEntireFileImpl(const std::string& fName)
{
if (!isOpen) return NULL;
std::string fileName = StringToLower(fName);
if (fileMap.find(fileName) == fileMap.end()) {
return NULL;
}
FileData *f = fileMap[fileName];
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 = filesystem.LocateFile(rpath);
gzFile in = gzopen (path.c_str(), "rb");
if (in == NULL) return NULL;
ABOpenFile_t* of = new ABOpenFile_t;
of->size = f->size;
of->pos = 0;
of->data = (char*) malloc(of->size);
int j, i = 0;
while (true) {
j = gzread(in, of->data + i, of->size - i);
if (j == 0) break;
if (j == -1) {
gzclose(in);
delete of;
return NULL;
}
i += j;
}
gzclose(in);
return of;
}
int CArchivePool::FindFiles(int cur, std::string* name, int* size)
{
if (cur < 0 || static_cast<size_t>(cur) >= files.size()) {
return 0;
} else {
*name = files[cur]->name;
*size = files[cur]->size;
return cur + 1;
}
}
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