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// TarOut.cpp
#include "StdAfx.h"
#include "Common/IntToString.h"
#include "../../Common/StreamUtils.h"
#include "TarOut.h"
namespace NArchive {
namespace NTar {
HRESULT COutArchive::WriteBytes(const void *buffer, UInt32 size)
{
return WriteStream(m_Stream, buffer, size);
}
void COutArchive::Create(ISequentialOutStream *outStream)
{
m_Stream = outStream;
}
static AString MakeOctalString(UInt64 value)
{
char s[32];
ConvertUInt64ToString(value, s, 8);
return AString(s) + ' ';
}
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 MakeOctalString8(char *s, UInt32 value)
{
AString tempString = MakeOctalString(value);
const int kMaxSize = 8;
if (tempString.Length() >= kMaxSize)
return false;
int numSpaces = kMaxSize - (tempString.Length() + 1);
for(int i = 0; i < numSpaces; i++)
s[i] = ' ';
MyStringCopy(s + numSpaces, (const char *)tempString);
return true;
}
static void MakeOctalString12(char *s, UInt64 value)
{
AString tempString = MakeOctalString(value);
const int kMaxSize = 12;
if (tempString.Length() > kMaxSize)
{
// GNU extension;
s[0] = (char)(Byte)0x80;
s[1] = s[2] = s[3] = 0;
for (int i = 0; i < 8; i++, value <<= 8)
s[4 + i] = (char)(value >> 56);
return;
}
int numSpaces = kMaxSize - tempString.Length();
for(int i = 0; i < numSpaces; i++)
s[i] = ' ';
memmove(s + numSpaces, (const char *)tempString, tempString.Length());
}
static bool CopyString(char *dest, const AString &src, int maxSize)
{
if (src.Length() >= maxSize)
return false;
MyStringCopy(dest, (const char *)src);
return true;
}
#define RETURN_IF_NOT_TRUE(x) { if (!(x)) return E_FAIL; }
HRESULT COutArchive::WriteHeaderReal(const CItem &item)
{
char record[NFileHeader::kRecordSize];
char *cur = record;
int i;
for (i = 0; i < NFileHeader::kRecordSize; i++)
record[i] = 0;
// RETURN_IF_NOT_TRUE(CopyString(header.Name, item.Name, NFileHeader::kNameSize));
if (item.Name.Length() > NFileHeader::kNameSize)
return E_FAIL;
MyStrNCpy(cur, item.Name, NFileHeader::kNameSize);
cur += NFileHeader::kNameSize;
RETURN_IF_NOT_TRUE(MakeOctalString8(cur, item.Mode)); cur += 8;
RETURN_IF_NOT_TRUE(MakeOctalString8(cur, item.UID)); cur += 8;
RETURN_IF_NOT_TRUE(MakeOctalString8(cur, item.GID)); cur += 8;
MakeOctalString12(cur, item.Size); cur += 12;
MakeOctalString12(cur, item.MTime); cur += 12;
memmove(cur, NFileHeader::kCheckSumBlanks, 8);
cur += 8;
*cur++ = item.LinkFlag;
RETURN_IF_NOT_TRUE(CopyString(cur, item.LinkName, NFileHeader::kNameSize));
cur += NFileHeader::kNameSize;
memmove(cur, item.Magic, 8);
cur += 8;
RETURN_IF_NOT_TRUE(CopyString(cur, item.User, NFileHeader::kUserNameSize));
cur += NFileHeader::kUserNameSize;
RETURN_IF_NOT_TRUE(CopyString(cur, item.Group, NFileHeader::kGroupNameSize));
cur += NFileHeader::kGroupNameSize;
if (item.DeviceMajorDefined)
RETURN_IF_NOT_TRUE(MakeOctalString8(cur, item.DeviceMajor));
cur += 8;
if (item.DeviceMinorDefined)
RETURN_IF_NOT_TRUE(MakeOctalString8(cur, item.DeviceMinor));
cur += 8;
UInt32 checkSumReal = 0;
for(i = 0; i < NFileHeader::kRecordSize; i++)
checkSumReal += Byte(record[i]);
RETURN_IF_NOT_TRUE(MakeOctalString8(record + 148, checkSumReal));
return WriteBytes(record, NFileHeader::kRecordSize);
}
HRESULT COutArchive::WriteHeader(const CItem &item)
{
int nameSize = item.Name.Length();
if (nameSize < NFileHeader::kNameSize)
return WriteHeaderReal(item);
CItem modifiedItem = item;
int nameStreamSize = nameSize + 1;
modifiedItem.Size = nameStreamSize;
modifiedItem.LinkFlag = 'L';
modifiedItem.Name = NFileHeader::kLongLink;
modifiedItem.LinkName.Empty();
RINOK(WriteHeaderReal(modifiedItem));
RINOK(WriteBytes(item.Name, nameStreamSize));
RINOK(FillDataResidual(nameStreamSize));
modifiedItem = item;
modifiedItem.Name = item.Name.Left(NFileHeader::kNameSize - 1);
return WriteHeaderReal(modifiedItem);
}
HRESULT COutArchive::FillDataResidual(UInt64 dataSize)
{
UInt32 lastRecordSize = UInt32(dataSize & (NFileHeader::kRecordSize - 1));
if (lastRecordSize == 0)
return S_OK;
UInt32 residualSize = NFileHeader::kRecordSize - lastRecordSize;
Byte residualBytes[NFileHeader::kRecordSize];
for (UInt32 i = 0; i < residualSize; i++)
residualBytes[i] = 0;
return WriteBytes(residualBytes, residualSize);
}
HRESULT COutArchive::WriteFinishHeader()
{
Byte record[NFileHeader::kRecordSize];
int i;
for (i = 0; i < NFileHeader::kRecordSize; i++)
record[i] = 0;
for (i = 0; i < 2; i++)
{
RINOK(WriteBytes(record, NFileHeader::kRecordSize));
}
return S_OK;
}
}}
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