/*
    open source routing machine
    Copyright (C) Dennis Luxen, 2010

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU AFFERO General Public License as published by
the Free Software Foundation; either version 3 of the License, or
any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
or see http://www.gnu.org/licenses/agpl.txt.
 */

#ifndef STRINGUTIL_H_
#define STRINGUTIL_H_

// precision:  position after decimal point
// length: maximum number of digits including comma and decimals
template< int length, int precision >
inline char* printInt( char* buffer, int value )
{
    bool minus = false;
    if ( value < 0 ) {
        minus = true;
        value = -value;
    }
    buffer += length - 1;
    for ( int i = 0; i < precision; i++ ) {
        *buffer = '0' + ( value % 10 );
        value /= 10;
        buffer--;
    }
    *buffer = '.';
    buffer--;
    for ( int i = precision + 1; i < length; i++ ) {
        *buffer = '0' + ( value % 10 );
        value /= 10;
        if ( value == 0 ) break;
        buffer--;
    }
    if ( minus ) {
        buffer--;
        *buffer = '-';
    }
    return buffer;
}

inline void intToString(const int value, std::string & output)
{
    // The largest 32-bit integer is 4294967295, that is 10 chars
    // On the safe side, add 1 for sign, and 1 for trailing zero
    char buffer[12] ;
    sprintf(buffer, "%i", value) ;
    output = buffer ;
}

inline void convertLatLon(const int value, std::string & output)
{
    char buffer[100];
    buffer[10] = 0; // Nullterminierung
    char* string = printInt< 10, 5 >( buffer, value );
    output = string;
}

/* used to be boosts lexical cast, but this was too slow */
inline void doubleToString(const double value, std::string & output)
{
    // The largest 32-bit integer is 4294967295, that is 10 chars
    // On the safe side, add 1 for sign, and 1 for trailing zero
    char buffer[12] ;
    sprintf(buffer, "%f", value) ;
    output = buffer ;
}

inline std::string & replaceAll(std::string &s, const std::string &sub, const std::string &other) {
    assert(!sub.empty());
    size_t b = 0;
    for (;;) {
        b = s.find(sub, b);
        if (b == s.npos) break;
        s.replace(b, sub.size(), other);
        b += other.size();
    }
    return s;
}

std::string originals[] = {"&", "\"",  "<",  ">", "'", "[", "]"};
std::string entities[] = {"&amp;", "&quot;", "&lt;", "&gt;", "&#39;", "&91;", "&93;" };

std::string HTMLEntitize( std::string result) {
    for(unsigned i = 0; i < sizeof(originals)/sizeof(std::string); i++) {
        result = replaceAll(result, originals[i], entities[i]);
    }
    return result;
}

std::string HTMLDeEntitize( std::string result) {
    for(unsigned i = 0; i < sizeof(originals)/sizeof(std::string); i++) {
        result = replaceAll(result, entities[i], originals[i]);
    }
    return result;
}
#endif /* STRINGUTIL_H_ */