248 lines
10 KiB
C++
248 lines
10 KiB
C++
/////////////////////////////////////////////////////////////////////
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// Utility Collection of Miscellanious Handy Functions
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// © Dan Andersson 2013
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/////////////////////////////////////////////////////////////////////
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#ifndef UTILITIES_H
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#define UTILITIES_H
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#include <string>
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#include <istream>
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#include <vector>
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#include <locale>
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#include <limits>
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namespace Utility
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{
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namespace DynamicMemory
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{
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/// If dynamicInstance is not NULL, then delete
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template<typename Type> void SafeDeleteInstance( Type *dynamicInstance );
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/// If dynamicArray is not NULL, then delete []
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template<typename Type> void SafeDeleteArray( Type dynamicArray[] );
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template<typename Type>
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struct UniquePointer
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{ /// Wrapper to safely transfer dynamic ownership/responsibility
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public:
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/// Assigns assignedInstance ownership to this UniquePonter, old owned instance will be deleted.
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/// If NULL is assigned is equavalent with clearing all responsibilities from this UniquePointer.
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UniquePointer( Type *assignedInstance = NULL );
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/// Will auto delete assigned dynamic instance.
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~UniquePointer();
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/// Assigns assignedInstance ownership to this UniquePonter, old owned instance will be deleted.
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/// If NULL is assigned is equavalent with clearing all responsibilities from this UniquePointer.
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UniquePointer<Type> & operator = ( Type *assignedInstance );
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/// Transfers assignedInstance ownership from donor to this UniquePonter, old owned instance will be deleted.
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/// If donor had nothing, is equavalent with clearing all responsibilities from this UniquePointer.
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UniquePointer<Type> & operator = ( const UniquePointer<Type> &donor );
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/// Access the assigned dynamic instance. Will crash if nothing there
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operator Type* ();
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/// Access the assigned dynamic instance. Will crash if nothing there
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operator const Type* () const;
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/// Access members of the assigned dynamic instance. Will crash if nothing there
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Type * operator -> ();
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/// Access members of the assigned dynamic instance. Will crash if nothing there
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const Type * operator -> () const;
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/// If true, this UniquePointer have a current ownership/responsibility of a dynamic instance.
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operator bool () const;
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/// This UniquePointer drops all claims of ownership/responsibility and returns the dynamic instance. Now it is your responsibility to delete.
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Type* Release();
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/// (inline) If true, this UniquePointer have a current ownership/responsibility of a dynamic instance.
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bool HaveOwnership() const;
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private:
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mutable Type *ownedInstance;
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};
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template<typename Type>
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struct UniqueArray
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{ /// Wrapper to safely transfer dynamic ownership/responsibility
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public:
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/// Assigns assignedInstance ownership to this UniquePonter, old owned array will be deleted.
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/// If NULL is assigned is equavalent with clearing all responsibilities from this UniqueArray.
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UniqueArray( Type assignedArray[] = NULL );
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/// Will auto delete assigned dynamic array.
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~UniqueArray();
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/// Assigns assignedInstance ownership to this UniquePonter, old owned array will be deleted.
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/// If NULL is assigned is equavalent with clearing all responsibilities from this UniqueArray.
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UniqueArray<Type> & operator = ( Type assignedArray[] );
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/// Transfers assignedInstance ownership from donor to this UniquePonter, old owned array will be deleted.
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/// If donor had nothing, is equavalent with clearing all responsibilities from this UniqueArray.
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UniqueArray<Type> & operator = ( const UniqueArray<Type> &donor );
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/// Accesses the instance at index i of this UniqeArray's owned dynamic array.
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/// Will crash if out-of-bound or there is no assigned array.
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template<typename Index> Type & operator [] ( Index i );
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/// Accesses the instance at index i of this UniqeArray's owned dynamic array.
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/// Will crash if out-of-bound or there is no assigned array.
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template<typename Index> const Type & operator [] ( Index i ) const;
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/// If true, this UniqueArray have a current ownership/responsibility of a dynamic instance.
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operator bool () const;
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/// This UniqueArray drops all claims of ownership/responsibility and returns the dynamic array. Now it is your responsibility to delete.
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Type* Release();
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/// (inline) If true, this UniqueArray have a current ownership/responsibility of a dynamic array.
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bool HaveOwnership() const;
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private:
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mutable Type *ownedArray;
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};
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}
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namespace String
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{
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// string
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::std::vector<::std::string> & Split( ::std::vector<::std::string> &output, const ::std::string &str, char delim, ::std::string::size_type offset = 0 );
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::std::vector<::std::string> & Split( ::std::vector<::std::string> &output, const ::std::string &str, const ::std::string &delim, ::std::string::size_type offset = 0 );
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::std::vector<::std::string> & Split( ::std::vector<::std::string> &output, const ::std::string &str, const ::std::vector<::std::string> &delim, ::std::string::size_type offset = 0 );
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::std::string Trim( const ::std::string &str );
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::std::string & ToLowerCase( ::std::string &output, const ::std::string &str );
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::std::string & ToLowerCase( ::std::string &str );
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::std::string & ToUpperCase( ::std::string &output, const ::std::string &str );
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::std::string & ToUpperCase( ::std::string &str );
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::std::string & ExtractDirPath( ::std::string &output, const ::std::string &file, char dirDelimeter );
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::std::string & ExtractDirPath( ::std::string &output, const ::std::string &file, const ::std::string &dirDelimeter );
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::std::string & ReplaceCharacters( ::std::string &str, char characterToReplace, char newCharacter, const ::std::string::size_type &offset = 0, const ::std::string::size_type &end = ::std::string::npos );
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// wstring
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::std::vector<::std::wstring> & Split( ::std::vector<::std::wstring> &output, const ::std::wstring &str, char delim, ::std::wstring::size_type offset = 0 );
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::std::vector<::std::wstring> & Split( ::std::vector<::std::wstring> &output, const ::std::wstring &str, const ::std::wstring &delim, ::std::wstring::size_type offset = 0 );
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::std::vector<::std::wstring> & Split( ::std::vector<::std::wstring> &output, const ::std::wstring &str, const ::std::vector<::std::wstring> &delim, ::std::wstring::size_type offset = 0 );
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}
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namespace Stream
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{
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float* ReadFloats( float *output, ::std::istream &input, unsigned int numFloats );
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}
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namespace StaticArray
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{
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template<typename ScalarType, unsigned int num>
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inline unsigned int NumElementsOf( const ScalarType(&)[num] )
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{ return num; }
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template<typename ScalarType, unsigned int num>
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inline ScalarType & FirstElementOf( ScalarType (&arr)[num] )
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{ return arr[0]; }
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template<typename ScalarType, unsigned int num>
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inline ScalarType & LastElementOf( ScalarType (&arr)[num] )
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{ return arr[num-1]; }
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}
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namespace Element
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{
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template<typename ScalarType>
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inline void Swap( ScalarType &elementA, ScalarType &elementB, ScalarType &swapSpace )
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{ swapSpace = elementA; elementA = elementB; elementB = swapSpace; }
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template<typename ScalarType>
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inline void Swap( ScalarType &elementA, ScalarType &elementB )
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{ ScalarType swapSpace; Swap( elementA, elementB, swapSpace ); }
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}
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namespace Value
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{
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using ::std::numeric_limits;
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template<typename ValueType>
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inline ValueType Abs( const ValueType &value )
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{ return value < 0 ? value * -1 : value; }
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template<typename ValueType>
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inline ValueType Max( const ValueType &valueA, const ValueType &valueB )
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{ return valueA > valueB ? valueA : valueB; }
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template<typename ValueType>
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inline ValueType Min( const ValueType &valueA, const ValueType &valueB )
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{ return valueA < valueB ? valueA : valueB; }
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template<typename ValueType>
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inline ValueType Average( const ValueType &valueA, const ValueType &valueB )
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{ return (valueA + valueB) * 0.5f; }
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template<typename ValueType>
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inline ValueType AverageWithDelta( const ValueType &origin, const ValueType &delta )
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{ return origin + (delta * 0.5f); }
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template<typename ValueType>
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inline ValueType Radian( const ValueType °ree )
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{ return degree * (3.1415926535897932384626433832795f / 180.0f); }
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template<typename ValueType>
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inline ValueType Degree( const ValueType &radian )
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{ return radian * (180.0f / 3.1415926535897932384626433832795f); }
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// SPECIALIZATIONS //////////////////////////////////////////
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template<> inline char Average<char>( const char &valueA, const char &valueB )
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{ return (valueA + valueB) >> 1; }
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template<> inline unsigned char Average<unsigned char>( const unsigned char &valueA, const unsigned char &valueB )
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{ return (valueA + valueB) >> 1; }
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template<> inline int Average<int>( const int &valueA, const int &valueB )
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{ return (valueA + valueB) >> 1; }
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template<> inline unsigned int Average<unsigned int>( const unsigned int &valueA, const unsigned int &valueB )
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{ return (valueA + valueB) >> 1; }
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template<> inline long Average<long>( const long &valueA, const long &valueB )
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{ return (valueA + valueB) >> 1; }
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template<> inline unsigned long Average<unsigned long>( const unsigned long &valueA, const unsigned long &valueB )
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{ return (valueA + valueB) >> 1; }
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template<> inline long long Average<long long>( const long long &valueA, const long long &valueB )
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{ return (valueA + valueB) >> 1; }
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template<> inline unsigned long long Average<unsigned long long>( const unsigned long long &valueA, const unsigned long long &valueB )
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{ return (valueA + valueB) >> 1; }
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template<> inline char AverageWithDelta<char>( const char &origin, const char &delta )
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{ return origin + (delta >> 1); }
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template<> inline unsigned char AverageWithDelta<unsigned char>( const unsigned char &origin, const unsigned char &delta )
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{ return origin + (delta >> 1); }
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template<> inline int AverageWithDelta<int>( const int &origin, const int &delta )
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{ return origin + (delta >> 1); }
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template<> inline unsigned int AverageWithDelta<unsigned int>( const unsigned int &origin, const unsigned int &delta )
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{ return origin + (delta >> 1); }
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template<> inline long AverageWithDelta<long>( const long &origin, const long &delta )
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{ return origin + (delta >> 1); }
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template<> inline unsigned long AverageWithDelta<unsigned long>( const unsigned long &origin, const unsigned long &delta )
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{ return origin + (delta >> 1); }
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template<> inline long long AverageWithDelta<long long>( const long long &origin, const long long &delta )
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{ return origin + (delta >> 1); }
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template<> inline unsigned long long AverageWithDelta<unsigned long long>( const unsigned long long &origin, const unsigned long long &delta )
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{ return origin + (delta >> 1); }
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}
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}
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#endif |