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/*
* Oreka -- A media capture and retrieval platform
*
* Copyright (C) 2005, orecx LLC
*
* http://www.orecx.com
*
* This program is free software, distributed under the terms of
* the GNU General Public License.
* Please refer to http://www.gnu.org/copyleft/gpl.html
*
*/
#ifndef __UTILS_H__
#define __UTILS_H__
#include "ace/Guard_T.h" // For some reason, this include must always come before the StdString include
// otherwise it gives the following compile error:
// error C2039: 'TryEnterCriticalSection' : is not a member of '`global namespace''
// If seeing this error somewhere, the remedy is to #include "Utils.h" first
#include "ace/Thread_Mutex.h"
#include "ace/OS_NS_stdlib.h"
#include "ace/OS_NS_time.h"
#include "StdString.h"
#include "OrkBase.h"
//============================================
// String related stuff
inline CStdString IntToString(int integer)
{
CStdString ret;
ret.Format("%d", integer);
return ret;
}
inline int StringToInt(CStdString& value)
{
char* errorLocation = NULL;
PCSTR szValue = (PCSTR)value;
int intValue = strtol(szValue, &errorLocation, 10);
if(*errorLocation != '\0')
throw CStdString(CStdString("StringToInt: invalid integer:") + value);
return intValue;
}
inline CStdString DoubleToString(double value)
{
CStdString ret;
ret.Format("%f", value);
return ret;
}
inline double StringToDouble(CStdString& value)
{
char* errorLocation = NULL;
PCSTR szValue = (PCSTR)value;
double doubleValue = strtod(szValue, &errorLocation);
if(errorLocation == szValue)
throw CStdString(CStdString("StringToDouble: invalid double:") + value);
return doubleValue;
}
//========================================================
// file related stuff
CStdString DLL_IMPORT_EXPORT FileBaseName(CStdString& path);
CStdString DLL_IMPORT_EXPORT FileStripExtension(CStdString& filename);
bool DLL_IMPORT_EXPORT FileCanOpen(CStdString& path);
//=====================================================
// threading related stuff
typedef ACE_Guard<ACE_Thread_Mutex> MutexSentinel;
//=====================================================
// Miscellanous stuff
/** A counter that generates a "counting" 3 character strings, i.e. aaa, aab, ..., zzz
that represents a number between 0 and 26^3-1 (wrapping counter)
and starts at a random location in this range.
useful for generating debugging IDs
*/
class AlphaCounter
{
public:
inline AlphaCounter::AlphaCounter()
{
// Generate pseudo-random number from high resolution time least significant two bytes
ACE_hrtime_t hrtime = ACE_OS::gethrtime();
unsigned short srandom = (short)hrtime;
double drandom = (double)srandom/65536.0; // 0 <= random < 1
m_counter = (unsigned int)(drandom*(26*26*26));
}
inline CStdString AlphaCounter::GetNext()
{
m_counter++;
if(m_counter >= (26*26*26) )
{
m_counter = 0;
}
unsigned int char1val = m_counter/(26*26);
unsigned int remains = m_counter%(26*26);
unsigned int char2val = remains/26;
unsigned int char3val = remains%26;
char1val += 65;
char2val += 65;
char3val += 65;
CStdString string;
string.Format("%c%c%c", char1val, char2val, char3val);
return string;
}
private:
unsigned int m_counter;
};
#endif
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