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// Archive/DebIn.cpp
#include "StdAfx.h"
#include "DebIn.h"
#include "DebHeader.h"
#include "Common/StringToInt.h"
#include "Windows/Defs.h"
#include "../../Common/StreamUtils.h"
namespace NArchive {
namespace NDeb {
using namespace NHeader;
HRESULT CInArchive::ReadBytes(void *data, UInt32 size, UInt32 &processedSize)
{
RINOK(ReadStream(m_Stream, 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(ReadStream(inStream, 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 void MyStrNCpy(char *dest, const char *src, int size)
{
for (int i = 0; i < size; i++)
{
char c = src[i];
dest[i] = c;
if (c == 0)
break;
}
}
static bool OctalToNumber(const char *s, int size, UInt64 &res)
{
char sz[32];
MyStrNCpy(sz, s, size);
sz[size] = 0;
const char *end;
int i;
for (i = 0; sz[i] == ' '; i++);
res = ConvertOctStringToUInt64(sz + i, &end);
return (*end == ' ' || *end == 0);
}
static bool OctalToNumber32(const char *s, int size, UInt32 &res)
{
UInt64 res64;
if (!OctalToNumber(s, size, res64))
return false;
res = (UInt32)res64;
return (res64 <= 0xFFFFFFFF);
}
static bool DecimalToNumber(const char *s, int size, UInt64 &res)
{
char sz[32];
MyStrNCpy(sz, s, size);
sz[size] = 0;
const char *end;
int i;
for (i = 0; sz[i] == ' '; i++);
res = ConvertStringToUInt64(sz + i, &end);
return (*end == ' ' || *end == 0);
}
static bool DecimalToNumber32(const char *s, int size, UInt32 &res)
{
UInt64 res64;
if (!DecimalToNumber(s, size, res64))
return false;
res = (UInt32)res64;
return (res64 <= 0xFFFFFFFF);
}
#define RIF(x) { if (!(x)) return S_FALSE; }
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];
MyStrNCpy(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;
RIF(DecimalToNumber32(cur, kTimeSize, item.ModificationTime));
cur += kTimeSize;
cur += 6 + 6;
RIF(OctalToNumber32(cur, kModeSize, item.Mode));
cur += kModeSize;
RIF(DecimalToNumber(cur, kSizeSize, item.Size));
cur += kSizeSize;
filled = true;
return S_OK;
}
HRESULT CInArchive::GetNextItem(bool &filled, CItemEx &item)
{
for (;;)
{
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);
}
}
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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