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// Archive/DebIn.cpp
#include "StdAfx.h"
#include "DebIn.h"
#include "DebHeader.h"
#include "Windows/Defs.h"
namespace NArchive {
namespace NDeb {
using namespace NHeader;
HRESULT CInArchive::ReadBytes(void *data, UInt32 size, UInt32 &processedSize)
{
RINOK(m_Stream->Read(data, size, &processedSize));
m_Position += processedSize;
return S_OK;
}
HRESULT CInArchive::Open(IInStream *inStream)
{
RINOK(inStream->Seek(0, STREAM_SEEK_CUR, &m_Position));
char signature[kSignatureLen];
UInt32 processedSize;
RINOK(inStream->Read(signature, kSignatureLen, &processedSize));
m_Position += processedSize;
if (processedSize != kSignatureLen)
return S_FALSE;
if (memcmp(signature, kSignature, kSignatureLen) != 0)
return S_FALSE;
m_Stream = inStream;
return S_OK;
}
static bool CheckString(const char *srcString, int numChars, int radix)
{
for(int i = 0; i < numChars; i++)
{
char c = srcString[i];
if (c == 0)
return true;
if (c >= '0' && c <= '0' + radix - 1)
continue;
if (c != ' ')
return false;
}
return true;
}
static bool CheckOctalString(const char *srcString, int numChars)
{ return CheckString(srcString, numChars, 8); }
static bool CheckDecimalString(const char *srcString, int numChars)
{ return CheckString(srcString, numChars, 10); }
#define ReturnIfBadOctal(x, y) { if (!CheckOctalString((x), (y))) return S_FALSE; }
#define ReturnIfBadDecimal(x, y) { if (!CheckDecimalString((x), (y))) return S_FALSE; }
static UInt32 StringToNumber(const char *srcString, int numChars, int radix)
{
AString modString;
for (int i = 0; i < numChars; i++)
modString += srcString[i];
char *endPtr;
return strtoul(modString, &endPtr, radix);
}
static UInt32 OctalToNumber(const char *srcString, int numChars)
{ return StringToNumber(srcString, numChars, 8); }
static UInt32 DecimalToNumber(const char *srcString, int numChars)
{ return StringToNumber(srcString, numChars, 10); }
HRESULT CInArchive::GetNextItemReal(bool &filled, CItemEx &item)
{
filled = false;
char header[NHeader::kHeaderSize];
const char *cur = header;
UInt32 processedSize;
item.HeaderPosition = m_Position;
RINOK(ReadBytes(header, sizeof(header), processedSize));
if (processedSize < sizeof(header))
return S_OK;
char tempString[kNameSize + 1];
strncpy(tempString, cur, kNameSize);
cur += kNameSize;
tempString[kNameSize] = '\0';
item.Name = tempString;
item.Name.Trim();
for (int i = 0; i < item.Name.Length(); i++)
if (((Byte)item.Name[i]) < 0x20)
return S_FALSE;
ReturnIfBadDecimal(cur, kTimeSize);
item.ModificationTime = DecimalToNumber(cur, kTimeSize);
cur += kTimeSize;
cur += 6 + 6;
ReturnIfBadOctal(cur, kModeSize);
item.Mode = OctalToNumber(cur, kModeSize);
cur += kModeSize;
ReturnIfBadDecimal(cur, kSizeSize);
item.Size = DecimalToNumber(cur, kSizeSize);
cur += kSizeSize;
filled = true;
return S_OK;
}
HRESULT CInArchive::GetNextItem(bool &filled, CItemEx &item)
{
while(true)
{
RINOK(GetNextItemReal(filled, item));
if (!filled)
return S_OK;
if (item.Name.CompareNoCase("debian-binary") != 0)
return S_OK;
if (item.Size != 4)
return S_OK;
SkeepData(item.Size);
}
return S_OK;
}
HRESULT CInArchive::Skeep(UInt64 numBytes)
{
UInt64 newPostion;
RINOK(m_Stream->Seek(numBytes, STREAM_SEEK_CUR, &newPostion));
m_Position += numBytes;
if (m_Position != newPostion)
return E_FAIL;
return S_OK;
}
HRESULT CInArchive::SkeepData(UInt64 dataSize)
{
return Skeep((dataSize + 1) & (~((UInt64)0x1)));
}
}}
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