92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
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/* XFce 4 - Netload Plugin
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* Copyright (c) 2003 Bernhard Walle <bernhard.walle@gmx.de>
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*
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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 General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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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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*
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* You should have received a copy of the GNU 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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*/
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#include <stdio.h>
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#include <string.h>
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#include <limits.h>
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#include <locale.h>
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#ifndef BUFSIZ
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#define BUFSIZ 512
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#endif
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char* format_with_thousandssep( char* string, int stringsize, double number, int digits )
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{
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char* str = string;
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char buffer[BUFSIZ], formatstring[BUFSIZ];
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char* bufptr = buffer;
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unsigned int i;
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int numberOfIntegerChars, count;
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struct lconv* localeinfo = localeconv();
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int grouping = (int)localeinfo->grouping[0] == 0 ? INT_MAX : (int)localeinfo->grouping[0];
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/* sensible value for digits */
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if( digits < 0 || digits >= 10 )
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{
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digits = 2;
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}
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snprintf( formatstring, BUFSIZ, "%%.%df", digits );
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snprintf( buffer, BUFSIZ, formatstring, number );
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/* get the number of integer characters */
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count = numberOfIntegerChars = ( digits > 0
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? ( strstr( buffer, localeinfo->decimal_point ) - buffer )
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: strlen( buffer ) );
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/* check for length */
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if( numberOfIntegerChars / grouping + (int)strlen( buffer ) > stringsize )
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{
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return NULL;
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}
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/* insert the thousands separator */
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while( *bufptr != 0 && *bufptr != localeinfo->decimal_point[0] )
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{
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if( count % grouping == 0 && count != numberOfIntegerChars )
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{
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for( i = 0; i < strlen( localeinfo->thousands_sep ); i++ )
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{
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*str++ = localeinfo->thousands_sep[i];
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}
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}
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*str++ = *bufptr++;
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count--;
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}
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/* Copy the rest */
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while( digits > 0 && *bufptr != 0 )
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{
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*str++ = *bufptr++;
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}
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/* terminate with 0 finally */
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*str = 0;
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return string;
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}
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