83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
/*
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open source routing machine
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Copyright (C) Dennis Luxen, 2010
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU AFFERO General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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or see http://www.gnu.org/licenses/agpl.txt.
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*/
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#ifndef STRINGUTIL_H_
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#define STRINGUTIL_H_
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// precision: position after decimal point
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// length: maximum number of digits including comma and decimals
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template< int length, int precision >
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inline char* printInt( char* buffer, int value )
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{
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bool minus = false;
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if ( value < 0 ) {
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minus = true;
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value = -value;
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}
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buffer += length - 1;
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for ( int i = 0; i < precision; i++ ) {
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*buffer = '0' + ( value % 10 );
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value /= 10;
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buffer--;
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}
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*buffer = '.';
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buffer--;
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for ( int i = precision + 1; i < length; i++ ) {
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*buffer = '0' + ( value % 10 );
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value /= 10;
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if ( value == 0 ) break;
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buffer--;
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}
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if ( minus ) {
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buffer--;
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*buffer = '-';
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}
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return buffer;
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}
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inline void intToString(const int value, std::string & output)
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{
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// The largest 32-bit integer is 4294967295, that is 10 chars
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// On the safe side, add 1 for sign, and 1 for trailing zero
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char buffer[12] ;
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sprintf(buffer, "%i", value) ;
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output = buffer ;
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}
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inline void convertLatLon(const int value, std::string & output)
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{
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char buffer[100];
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buffer[10] = 0; // Nullterminierung
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char* string = printInt< 10, 5 >( buffer, value );
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output = string;
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}
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/* used to be boosts lexical cast, but this was too slow */
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inline void doubleToString(const double value, std::string & output)
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{
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// The largest 32-bit integer is 4294967295, that is 10 chars
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// On the safe side, add 1 for sign, and 1 for trailing zero
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char buffer[12] ;
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sprintf(buffer, "%f", value) ;
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output = buffer ;
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}
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#endif /* STRINGUTIL_H_ */
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