quotedprintable.cc

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/*	Name 		:	quotedprintable
**	File		:	quotedprintable.h
**	Author		:	Inconnu
**	Description	:	Permet d'encoder et de decoder des caractere accentues QUOTED-PRINTABLE
**
**	Version		:	
**	Note		:	
**	Mail		:	
**	Copyright	:	
*/

#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <sstream>
#include <string>

using namespace std;

void enc_quotedP(string & str)
{
	ostringstream buf;
	ostringstream hexa;
	string hexaVal;
	for(int i=0;i<str.size();++i)
	{
		unsigned int carac = (unsigned) str[i];
		if ( carac > 127 ) 	//encodage sur 2 octets
		{
				unsigned int carac2 =  (unsigned) str[++i];
				carac  = (carac-192)<<6;
				carac2 = carac2 - 128;

				carac  = carac + carac2;
				hexa << hex << carac;	
				hexaVal = hexa.str();
				if (buf.str().size()%76 < 71)
					buf << "=" 
						<< hexaVal.substr(hexaVal.size()-2,hexaVal.size());
				else 
					buf << "=\r\n="
						<< hexaVal.substr(hexaVal.size()-2,hexaVal.size());
				hexa << flush; hexaVal.clear();
		}
		else if (buf.str().size()%76 < 73)				//encodage sur 1 octet
			buf << str[i]; 
		else buf << "=\r\n" << str[i];
	}
	str = buf.str();
}

void dec_quotedP(string & str)
{	
	ostringstream buf;

	for(int i=0;i<str.size();++i)
	{
		if (str[i] == '=')
			if (str[++i] == '\r') ++i;
			else 
			{
				string c = str.substr(i,2);
				char *pEnd;
				short unsigned int car = strtol (c.c_str(),&pEnd,16);

				//on veut les 6 derniers bits + 128
				int Msk  = car & 63 | 128;

				//on veut les 2 derniers bits et on les décale de
				//6 positions 
				int Msk2 = 195 ;

				buf << char(Msk2) << char(Msk);
				//buf << (char)car;
				++i;
			}
		else  
			buf << str[i];
	}
	str = buf.str();
}