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#include "common.h"
#include "utils.h"
#include <unzip.h>
extern "C" void fill_memory_filefunc64 (zlib_filefunc64_def* pzlib_filefunc_def);
bool extractCurrentFile(unzFile uf, TCHAR *path)
{
int err = UNZ_OK;
unz_file_info64 file_info;
char filename[MAX_PATH];
char buf[8192];
err = unzGetCurrentFileInfo64(uf, &file_info, filename, sizeof(filename), buf, sizeof(buf), NULL, 0);
if (err != UNZ_OK) return false;
// Get Unicode file name for InfoZip style archives, otherwise assume PKZip/WinZip style
if (file_info.size_file_extra)
{
char *p = buf;
unsigned long size = min(file_info.size_file_extra, sizeof(buf));
while (size > 0)
{
unsigned short id = *(unsigned short*)p;
unsigned len = *(unsigned short*)(p + 2);
if (size < (len + 4)) break;
if (id == 0x7075 && len > 5 && (len - 5) < sizeof(filename) && *(p + 4) == 1)
{
memcpy(filename, p + 9, len - 5);
filename[len - 5] = 0;
break;
}
size -= len + 4;
p += len + 4;
}
}
TCHAR save_file[MAX_PATH];
TCHAR* p = mir_utf8decodeT(filename);
if (p == NULL) p = mir_a2t(filename);
mir_sntprintf(save_file, SIZEOF(save_file), _T("%s\\%s"), path, p);
mir_free(p);
for (p = save_file; *p; ++p) if (*p == '/') *p = '\\';
if (file_info.external_fa & FILE_ATTRIBUTE_DIRECTORY)
CreatePath(save_file);
else
{
err = unzOpenCurrentFile(uf);
if (err != UNZ_OK) return false;
p = _tcsrchr(save_file, '\\'); if (p) *p = 0;
CreatePath(save_file);
if (p) *p = '\\';
HANDLE hFile = CreateFile(save_file, GENERIC_WRITE, FILE_SHARE_WRITE, 0,
CREATE_ALWAYS, file_info.external_fa, 0);
if (hFile != INVALID_HANDLE_VALUE)
{
for (;;)
{
err = unzReadCurrentFile(uf, buf, sizeof(buf));
if (err <= 0) break;
DWORD bytes;
if (!WriteFile(hFile, buf, err, &bytes, FALSE))
{
err = UNZ_ERRNO;
break;
}
}
FILETIME ftLocal, ftCreate, ftLastAcc, ftLastWrite;
GetFileTime(hFile, &ftCreate, &ftLastAcc, &ftLastWrite);
DosDateTimeToFileTime(HIWORD(file_info.dosDate), LOWORD(file_info.dosDate), &ftLocal);
LocalFileTimeToFileTime(&ftLocal, &ftLastWrite);
SetFileTime(hFile, &ftCreate, &ftLastAcc, &ftLastWrite);
CloseHandle(hFile);
unzCloseCurrentFile(uf); /* don't lose the error */
}
}
return true;
}
void unzip_mem(char* buf, int len, TCHAR* dest)
{
zlib_filefunc64_def ffunc;
fill_memory_filefunc64(&ffunc);
char zipfile[128];
mir_snprintf(zipfile, sizeof(zipfile), "%p+%x", buf, len);
unzFile uf = unzOpen2_64(zipfile, &ffunc);
if (uf)
{
do {
extractCurrentFile(uf, dest);
}
while (unzGoToNextFile(uf) == UNZ_OK);
unzClose(uf);
}
}
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