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// Archive/ZipItem.cpp
#include "StdAfx.h"
#include "../../../../C/CpuArch.h"
#include "../../../Common/MyLinux.h"
#include "../Common/ItemNameUtils.h"
#include "ZipItem.h"
namespace NArchive {
namespace NZip {
using namespace NFileHeader;
bool CExtraSubBlock::ExtractNtfsTime(unsigned index, FILETIME &ft) const
{
ft.dwHighDateTime = ft.dwLowDateTime = 0;
UInt32 size = (UInt32)Data.Size();
if (ID != NExtraID::kNTFS || size < 32)
return false;
const Byte *p = (const Byte *)Data;
p += 4; // for reserved
size -= 4;
while (size > 4)
{
UInt16 tag = GetUi16(p);
unsigned attrSize = GetUi16(p + 2);
p += 4;
size -= 4;
if (attrSize > size)
attrSize = size;
if (tag == NNtfsExtra::kTagTime && attrSize >= 24)
{
p += 8 * index;
ft.dwLowDateTime = GetUi32(p);
ft.dwHighDateTime = GetUi32(p + 4);
return true;
}
p += attrSize;
size -= attrSize;
}
return false;
}
bool CExtraSubBlock::ExtractUnixTime(bool isCentral, unsigned index, UInt32 &res) const
{
res = 0;
UInt32 size = (UInt32)Data.Size();
if (ID != NExtraID::kUnixTime || size < 5)
return false;
const Byte *p = (const Byte *)Data;
Byte flags = *p++;
size--;
if (isCentral)
{
if (index != NUnixTime::kMTime ||
(flags & (1 << NUnixTime::kMTime)) == 0 ||
size < 4)
return false;
res = GetUi32(p);
return true;
}
for (unsigned i = 0; i < 3; i++)
if ((flags & (1 << i)) != 0)
{
if (size < 4)
return false;
if (index == i)
{
res = GetUi32(p);
return true;
}
p += 4;
size -= 4;
}
return false;
}
bool CLocalItem::IsDir() const
{
return NItemName::HasTailSlash(Name, GetCodePage());
}
bool CItem::IsDir() const
{
if (NItemName::HasTailSlash(Name, GetCodePage()))
return true;
if (!FromCentral)
return false;
UInt16 highAttrib = (UInt16)((ExternalAttrib >> 16 ) & 0xFFFF);
Byte hostOS = GetHostOS();
switch (hostOS)
{
case NHostOS::kAMIGA:
switch (highAttrib & NAmigaAttrib::kIFMT)
{
case NAmigaAttrib::kIFDIR: return true;
case NAmigaAttrib::kIFREG: return false;
default: return false; // change it throw kUnknownAttributes;
}
case NHostOS::kFAT:
case NHostOS::kNTFS:
case NHostOS::kHPFS:
case NHostOS::kVFAT:
return ((ExternalAttrib & FILE_ATTRIBUTE_DIRECTORY) != 0);
case NHostOS::kAtari:
case NHostOS::kMac:
case NHostOS::kVMS:
case NHostOS::kVM_CMS:
case NHostOS::kAcorn:
case NHostOS::kMVS:
return false; // change it throw kUnknownAttributes;
case NHostOS::kUnix:
return MY_LIN_S_ISDIR(highAttrib);
default:
return false;
}
}
UInt32 CItem::GetWinAttrib() const
{
UInt32 winAttrib = 0;
switch (GetHostOS())
{
case NHostOS::kFAT:
case NHostOS::kNTFS:
if (FromCentral)
winAttrib = ExternalAttrib;
break;
case NHostOS::kUnix:
// do we need to clear 16 low bits in this case?
if (FromCentral)
winAttrib = ExternalAttrib & 0xFFFF0000;
break;
}
if (IsDir()) // test it;
winAttrib |= FILE_ATTRIBUTE_DIRECTORY;
return winAttrib;
}
bool CItem::GetPosixAttrib(UInt32 &attrib) const
{
// some archivers can store PosixAttrib in high 16 bits even with HostOS=FAT.
if (FromCentral && GetHostOS() == NHostOS::kUnix)
{
attrib = ExternalAttrib >> 16;
return (attrib != 0);
}
attrib = 0;
if (IsDir())
attrib = MY_LIN_S_IFDIR;
return false;
}
}}
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