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// RarVol.h
#ifndef __ARCHIVE_RAR_VOL_H
#define __ARCHIVE_RAR_VOL_H
#include "../../../Common/StringConvert.h"
#include "RarHeader.h"
namespace NArchive {
namespace NRar {
inline bool IsDigit(wchar_t c)
{
return c >= L'0' && c <= L'9';
}
class CVolumeName
{
bool _first;
bool _newStyle;
UString _unchangedPart;
UString _changedPart;
UString _afterPart;
public:
CVolumeName(): _newStyle(true) {};
bool InitName(const UString &name, bool newStyle = true)
{
_first = true;
_newStyle = newStyle;
int dotPos = name.ReverseFind_Dot();
UString basePart = name;
if (dotPos >= 0)
{
UString ext = name.Ptr(dotPos + 1);
if (ext.IsEqualTo_Ascii_NoCase("rar"))
{
_afterPart = name.Ptr(dotPos);
basePart = name.Left(dotPos);
}
else if (ext.IsEqualTo_Ascii_NoCase("exe"))
{
_afterPart.SetFromAscii(".rar");
basePart = name.Left(dotPos);
}
else if (!_newStyle)
{
if (ext.IsEqualTo_Ascii_NoCase("000") ||
ext.IsEqualTo_Ascii_NoCase("001") ||
ext.IsEqualTo_Ascii_NoCase("r00") ||
ext.IsEqualTo_Ascii_NoCase("r01"))
{
_afterPart.Empty();
_first = false;
_changedPart = ext;
_unchangedPart = name.Left(dotPos + 1);
return true;
}
}
}
if (!_newStyle)
{
_afterPart.Empty();
_unchangedPart = basePart;
_unchangedPart += L'.';
_changedPart.SetFromAscii("r00");
return true;
}
if (basePart.IsEmpty())
return false;
unsigned i = basePart.Len();
do
if (!IsDigit(basePart[i - 1]))
break;
while (--i);
_unchangedPart = basePart.Left(i);
_changedPart = basePart.Ptr(i);
return true;
}
/*
void MakeBeforeFirstName()
{
unsigned len = _changedPart.Len();
_changedPart.Empty();
for (unsigned i = 0; i < len; i++)
_changedPart += L'0';
}
*/
UString GetNextName()
{
if (_newStyle || !_first)
{
unsigned i = _changedPart.Len();
for (;;)
{
wchar_t c = _changedPart[--i];
if (c == L'9')
{
c = L'0';
_changedPart.ReplaceOneCharAtPos(i, c);
if (i == 0)
{
_changedPart.InsertAtFront(L'1');
break;
}
continue;
}
c++;
_changedPart.ReplaceOneCharAtPos(i, c);
break;
}
}
_first = false;
return _unchangedPart + _changedPart + _afterPart;
}
};
}}
#endif
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