CWE-ou-minkata/Sources/Plasma/CoreLib/hsStlUtils.h

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*==LICENSE==*/
#ifndef hsStlUtils_h_inc
#define hsStlUtils_h_inc


#include "HeadSpin.h"
#include <functional>
#include <algorithm>
#include <string>
#include <vector>
#include <map>
#include <list>
#include <set>


/*****************************************************************************
*
*   stl extensions
*
***/
namespace xtl
{

// Why oh why doesn't stl have copy_if?
// See Effective STL [Meyers 2001] Item 36.
template< typename InIt, typename OutIt, typename Pred >
OutIt copy_if( InIt srcBegin, InIt srcEnd, OutIt dstBegin, Pred pred )
{
    while ( srcBegin!=srcEnd )
    {
        if ( pred( *srcBegin ) )
            *dstBegin++ = *srcBegin;
        ++srcBegin;
    }
    return dstBegin;
}



// useful when clearing a vector/list/set of pointers that need to be deleted.
// use like:
//  std::vector<foo*>   vec;
//  std::for_each(vec.begin(),vec.end(),xtl::delete_ptr());
//  vec.clear();

struct delete_ptr
{
    template< class T > void operator()( T * p ) const { delete p;}
};

// useful when clearing a map of pointers that need to be deleted.
// use like:
//  typedef std::map<int,foo*> foomap;
//  foomap  m;
//  std::for_each(m.begin(),m.end(),xtl::delete_map_ptr_T<foomap>());
//  m.clear();

template< class A >
struct delete_map_ptr_T
{
    void operator()( typename A::value_type & pair ) const { delete pair.second;}
};

// case insensitive string comparer
//  useful in maps that use strings
struct stricmp_less : public std::binary_function<std::string, std::string, bool>
{
    bool operator()(const std::string & _X, const std::string & _Y) const
    {return ( stricmp(_X.c_str(),_Y.c_str()) < 0); }
};
struct wstricmp_less : public std::binary_function<std::wstring, std::wstring, bool>
{
    bool operator()(const std::wstring & _X, const std::wstring & _Y) const
    {return ( wcsicmp(_X.c_str(),_Y.c_str()) < 0); }
};

// struct stricmp_char_traits
// case insensitive char_traits. used in creating istring class below
#ifdef __SGI_STL_PORT
struct stricmp_char_traits : public __std_alias::char_traits< char >
#else
struct stricmp_char_traits : public std::char_traits< char >
#endif
{
    static int compare(const char * A, const char * B, size_t N)
    {
        for (size_t I=0; I<N; ++I, ++A,++B)
            if (tolower(*A)!=tolower(*B))
                return (lt(tolower(*A),tolower(*B))?-1:+1);
        return (0);
    }
    
    static const char * find(const char * S, size_t N, const char & C)
    {
        char c = tolower(C);
        for (; 0<N; --N, ++S)
            if (c==tolower(*S))
                return S;
        return NULL;
    }
};
#ifdef __SGI_STL_PORT
struct wstricmp_char_traits : public __std_alias::char_traits< wchar_t >
#else
struct wstricmp_char_traits : public std::char_traits< wchar_t >
#endif
{
    static int compare(const wchar_t * A, const wchar_t * B, size_t N)
    {
        for (size_t I=0; I<N; ++I, ++A,++B)
            if (tolower(*A)!=tolower(*B))
                return (lt(tolower(*A),tolower(*B))?-1:+1);
        return (0);
    }

    static const wchar_t * find(const wchar_t * S, size_t N, const wchar_t & C)
    {
        wchar_t c = tolower(C);
        for (; 0<N; --N, ++S)
            if (c==tolower(*S))
                return S;
        return NULL;
    }
};

// class istring
//  A string with case insensitive char_traits.
//  Calls to its find* methods are case insensitive.
typedef std::basic_string<char, stricmp_char_traits> istring;
typedef std::basic_string<wchar_t, wstricmp_char_traits> iwstring;

// std::string trim
std::string & trimleft(std::string & s, const char * charset=" \t\n\r");
std::wstring & trimleft(std::wstring & s, const wchar_t * charset=L" \t\n\r");
std::string & trimright(std::string & s, const char * charset=" \t\n\r");
std::wstring & trimright(std::wstring & s, const wchar_t * charset=L" \t\n\r");
std::string & trim(std::string & s, const char * charset=" \t\n\r");
std::wstring & trim(std::wstring & s, const wchar_t * charset=L" \t\n\r");
// xtl::istring trim
xtl::istring & trimleft(xtl::istring & s, const char * charset=" \t\n\r");
xtl::iwstring & trimleft(xtl::iwstring & s, const wchar_t * charset=L" \t\n\r");
xtl::istring & trimright(xtl::istring & s, const char * charset=" \t\n\r");
xtl::iwstring & trimright(xtl::iwstring & s, const wchar_t * charset=L" \t\n\r");
xtl::istring & trim(xtl::istring & s, const char * charset=" \t\n\r");
xtl::iwstring & trim(xtl::iwstring & s, const wchar_t * charset=L" \t\n\r");
// c-string trim
std::string trim(const char * s, const char * charset=" \t\n\r");
std::wstring trim(const wchar_t * s, const wchar_t * charset=L" \t\n\r");
// format
std::string format(const char * fmt, ...);
std::wstring format(const wchar_t * fmt, ...);
std::string formatv(const char * fmt, va_list args);
std::wstring formatv(const wchar_t * fmt, va_list args);
bool format(std::string & out, const char * fmt, ...);
bool format(std::wstring & out, const wchar_t * fmt, ...);
bool formatv(std::string & out, const char * fmt, va_list args);
bool formatv(std::wstring & out, const wchar_t * fmt, va_list args);


template <typename T> bool GetStringGroup(const std::string& s, T& group, char sep = ',');
template <typename T> bool GetStringGroup(const std::wstring& s, T& group, wchar_t sep = L',');
template <typename T> bool GetStringGroupAsString(const T& group, std::string& s, char sep = ',');
template <typename T> bool GetStringGroupAsString(const T& group, std::wstring& s, wchar_t sep = L',');


} // namespace xtd



#endif // hsStlUtils_h_inc