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/*****************************************************************************/
/* Path.h Copyright (c) Ladislav Zezula 2019 */
/*---------------------------------------------------------------------------*/
/* Global path merger class */
/*---------------------------------------------------------------------------*/
/* Date Ver Who Comment */
/* -------- ---- --- ------- */
/* 24.07.17 1.00 Lad Created */
/*****************************************************************************/
#ifndef __CASC_PATH_H__
#define __CASC_PATH_H__
//-----------------------------------------------------------------------------
// Structures
template <typename xchar>
struct CASC_PATH
{
CASC_PATH(const xchar * szRoot, ...)
{
va_list argList;
Initialize(PATH_SEP_CHAR);
va_start(argList, szRoot);
Create(szRoot, argList);
va_end(argList);
}
CASC_PATH(xchar chSeparator = PATH_SEP_CHAR)
{
Initialize(chSeparator);
}
~CASC_PATH()
{
if(m_szBufferBegin != m_Buffer)
{
CASC_FREE(m_szBufferBegin);
}
}
void Create(const xchar * szRoot, ...)
{
va_list argList;
va_start(argList, szRoot);
Create(szRoot, argList);
va_end(argList);
}
void Create(const xchar * szRoot, va_list argList)
{
const xchar * szPathPart;
// Fill-in the root path
SetPathRoot(szRoot);
// Append all parts until there is NULL
while((szPathPart = va_arg(argList, const xchar *)) != NULL)
{
AppendString(szPathPart, true);
}
}
bool CutLastPart()
{
xchar * szBufferPtr;
// Cut ending (back)slashes, if any
while((m_szBufferPtr > m_szBufferBegin) && (m_szBufferPtr[-1] == _T('\\') || m_szBufferPtr[-1] == _T('/')))
m_szBufferPtr--;
szBufferPtr = m_szBufferPtr - 1;
// Cut the last path part
while(szBufferPtr > m_szBufferBegin)
{
// End of path?
if(szBufferPtr[0] == _T('\\') || szBufferPtr[0] == _T('/'))
{
m_szBufferPtr = szBufferPtr;
m_szBufferPtr[0] = 0;
return true;
}
// Go one character back
szBufferPtr--;
}
return false;
}
void SetLocalCaching(int bLocalCache)
{
m_bLocalCache = (xchar)(bLocalCache != 0);
}
bool LocalCaching()
{
return (m_bLocalCache != 0);
}
// LPCTSTR szPath = Path;
operator const xchar * () const
{
return m_szBufferBegin;
}
// LPTSTR szPath = Path.New();
xchar * New(bool bCutLastPart = false)
{
xchar * szNewStr;
if(bCutLastPart)
{
CutLastPart();
}
if((szNewStr = CASC_ALLOC<xchar>(Length() + 1)) != NULL)
{
memcpy(szNewStr, m_szBufferBegin, Length() * sizeof(xchar));
szNewStr[Length()] = 0;
}
return szNewStr;
}
size_t Save()
{
return (m_szBufferPtr - m_szBufferBegin);
}
bool Restore(size_t nSavePos)
{
if((m_szBufferBegin + nSavePos) < m_szBufferEnd)
{
m_szBufferPtr = m_szBufferBegin + nSavePos;
m_szBufferPtr[0] = 0;
return true;
}
return false;
}
// Path.CopyTo(szBuffer, _countof(szBuffer));
bool CopyTo(xchar * szBuffer, size_t cchBuffer)
{
if((Length() + 1) > cchBuffer)
return false;
memcpy(szBuffer, m_szBufferBegin, Length() * sizeof(xchar));
szBuffer[Length()] = 0;
return true;
}
size_t Length() const
{
return m_szBufferPtr - m_szBufferBegin;
}
bool SetPathRoot(const xchar * szRoot)
{
// Make sure that there is no characters
m_szBufferPtr = m_szBufferBegin;
m_szBufferPtr[0] = 0;
// Append the root path
return AppendString(szRoot, false);
}
bool AppendStringN(const xchar * szString, size_t nMaxchars, bool bWithSeparator)
{
const xchar * szStringEnd = szString + nMaxchars;
xchar chOneChar;
if(szString && szString[0] && nMaxchars)
{
// Append separator, if required and not in begin of the string
if(m_szBufferPtr > m_szBufferBegin && bWithSeparator)
AppendChar(m_chSeparator);
// Append the characters from the string
while(szString[0] && szString < szStringEnd)
{
// Retrieve the single character
chOneChar = *szString++;
// Normalize the character
if(chOneChar == '/' || chOneChar == '\\')
chOneChar = m_chSeparator;
if(!AppendChar(chOneChar))
break;
}
}
return true;
}
bool AppendString(const xchar * szString, bool bWithSeparator)
{
return AppendStringN(szString, (0x10000 / sizeof(xchar)), bWithSeparator);
}
bool AppendEKey(LPBYTE pbEKey)
{
xchar szEKey[MD5_STRING_SIZE + 1];
StringFromBinary(pbEKey, MD5_HASH_SIZE, szEKey);
AppendStringN(szEKey, 2, true);
AppendStringN(szEKey+2, 2, true);
return AppendString(szEKey, true);
}
bool AppendChar(xchar chOneChar)
{
// Buffer our of space?
if((m_szBufferPtr + 2) >= m_szBufferEnd)
{
xchar * szOldBuffer = m_szBufferBegin;
xchar * szNewBuffer;
size_t nToAllocate = (m_szBufferEnd - m_szBufferBegin) * 2;
size_t nLength = (m_szBufferPtr - m_szBufferBegin);
if((szNewBuffer = CASC_ALLOC<xchar>(nToAllocate)) == NULL)
return false;
// Copy the chars
memcpy(szNewBuffer, m_szBufferBegin, (m_szBufferPtr - m_szBufferBegin) * sizeof(xchar));
m_szBufferBegin = szNewBuffer;
m_szBufferPtr = m_szBufferBegin + nLength;
m_szBufferEnd = m_szBufferBegin + nToAllocate;
// Free the old buffer
if(szOldBuffer != m_Buffer)
CASC_FREE(szOldBuffer);
}
// Append the character
*m_szBufferPtr++ = chOneChar;
m_szBufferPtr[0] = 0;
return true;
}
protected:
void Initialize(xchar chSeparator)
{
m_szBufferBegin = m_szBufferPtr = m_Buffer;
m_szBufferEnd = m_szBufferBegin + _countof(m_Buffer);
m_chSeparator = chSeparator;
m_bLocalCache = 0;
m_Buffer[0] = 0;
}
xchar * m_szBufferBegin;
xchar * m_szBufferPtr;
xchar * m_szBufferEnd;
xchar m_Buffer[MAX_PATH];
xchar m_chSeparator;
xchar m_bLocalCache:1;
};
#endif // __CASC_PATH_H__
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