char_traits

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/*	Copyright (C) 2004 Garrett A. Kajmowicz

	This file is part of the uClibc++ Library.
	This library is free software; you can redistribute it and/or
	modify it under the terms of the GNU Lesser General Public
	License as published by the Free Software Foundation; either
	version 2.1 of the License, or (at your option) any later version.

	This library is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
	Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public
	License along with this library; if not, write to the Free Software
	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "basic_definitions"
#include <string.h>
#include "exception"
#include "memory"

#ifdef __UCLIBCXX_HAS_WCHAR__
#include "cwchar"
#include "cwctype"
#endif

#ifndef __HEADER_CHAR_TRAITS
#define __HEADER_CHAR_TRAITS 1

namespace std{
	/* Inlining all wrapped function calls to shrink the amount of code generated*/
	//Typedefs to use for stuff
	typedef signed int char_traits_off_type;

	//Generic char_traits
	template<class charT> struct _UCXXEXPORT char_traits { };

	//Specialize for char
	template<> struct _UCXXEXPORT char_traits<char> {
		typedef char char_type;
		typedef short int int_type;
		typedef char_traits_off_type off_type;
		typedef char_traits_off_type pos_type;
		typedef char state_type;
		
		inline static void assign(char_type & c, const char_type & d) { c = d; }

		inline static bool eq(const char_type& c1, const char_type& c2){
			if(strncmp(&c1, &c2, 1) == 0){
				return true;
			}
			return false;
		}

		static char_type to_char_type(const int_type & i){
			if(i > 0 && i <= 255){
		return (char)(unsigned char)i;
			}

			//Out of range
			return 0;
		}

		inline static int_type to_int_type(const char_type & c){
			return (short int)(unsigned char)c;
		}

		inline static bool eq_int_type(const int_type & a, const int_type & b){
			if(a==b){
				return true;
			}
			return false;
		}


		inline static bool lt(const char_type& c1, const char_type& c2){
			if(strncmp(&c1, &c2, 1) < 0){
				return true;
			}
			return false;
		}

		inline static char_type* move(char_type* s1, const char_type* s2, size_t n){
			return (char*) memmove(s1, s2, n);
		}

		inline static char_type* copy(char_type* s1, const char_type* s2, size_t n){
			for(unsigned long int i=0; i< n; ++i){
				assign(s1[i], s2[i]);
			}
			return s1 + n;
		}

		inline static char_type* assign(char_type* s, size_t n, char_type a){
			return (char *)memset(s, a, n);
		}

		inline static int compare(const char_type* s1, const char_type* s2, size_t n){
			return strncmp(s1, s2, n);
		}

		inline static size_t length(const char_type* s){
			return strlen(s);
		}

		static const char_type* find(const char_type* s, int n, const char_type& a);

		inline static char_type eos() { return 0; }
		inline static int_type eof() { return -1; }
		inline static int_type not_eof(const int_type & i) {
			if(i == -1){
				return 0;
			} else {
				return i;
			}
		}
		/*
		static state_type get_state(pos_type p){
			p = p;
			state_type a;
			return a;
		}*/
	};


#ifdef __UCLIBCXX_HAS_WCHAR__
	template<> struct _UCXXEXPORT char_traits<wchar_t> {
		typedef wchar_t char_type;
		typedef wint_t int_type;
		typedef char_traits_off_type off_type;
		typedef char_traits_off_type pos_type;
		typedef mbstate_t state_type;

		static void assign(char_type & c, const char_type & d){ c=d; }

		static char_type to_char_type(const int_type & i){
			return i;
		}

		static int_type to_int_type(const char_type & c){
			return c;
		}

		inline static bool eq_int_type(const int_type & a, const int_type & b){
			if(a==b){
				return true;
			}
			return false;
		}

		inline static bool eq(const char_type& c1, const char_type& c2){
			if(wcsncmp(&c1, &c2, 1) == 0){
				return true;
			}
			return false;
		}

		inline static bool lt(const char_type& c1, const char_type& c2){
			if(wcsncmp(&c1, &c2, 1) < 0){
				return true;
			}
			return false;
		}

		inline static char_type* move(char_type* s1, const char_type* s2, size_t n){
			return (char_type*) memmove(s1, s2, n * sizeof(char_type));
		}

		inline static char_type* copy(char_type* s1, const char_type* s2, size_t n){
			for(unsigned long int i=0; i< n; ++i){
				assign(s1[i], s2[i]);
			}
			return s1 + n;
		}

		inline static char_type* assign(char_type* s, size_t n, char_type a){
			return (char_type *)memset(s, a, n);	/*FIXME*/
		}

		inline static int compare(const char_type* s1, const char_type* s2, size_t n){
			return wcsncmp(s1, s2, n);
		}

		inline static size_t length(const char_type* s){
			return wcslen(s);
		}

		static const char_type* find(const char_type* s, int n, const char_type& a);

		inline static char_type eos() { return 0; }
		inline static int_type eof() { return WEOF; }
		inline static int_type not_eof(const int_type & i) {
			if(i == WEOF){
				return (int_type)0;
			} else {
				return i;
			}
		}
		/*
		static state_type get_state(pos_type){
			state_type a;
			return a;
		}*/
	};
#endif

}

#endif