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92 lines
2.7 KiB
92 lines
2.7 KiB
/*****************************************************************************
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* strtoll.c: C strtoll() replacement
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*****************************************************************************
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* Copyright © 1998-2008 the VideoLAN project
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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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdlib.h>
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#include <string.h>
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long long int strtoll( const char *nptr, char **endptr, int base )
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{
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long long i_value = 0;
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int sign = 1, newbase = base ? base : 10;
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nptr += strspn( nptr, "\t " );
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if( *nptr == '-' )
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{
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sign = -1;
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nptr++;
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}
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/* Try to detect base */
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if( *nptr == '0' )
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{
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newbase = 8;
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nptr++;
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if( *nptr == 'x' )
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{
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newbase = 16;
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nptr++;
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}
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}
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if( base && newbase != base )
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{
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if( endptr ) *endptr = (char *)nptr;
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return i_value;
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}
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switch( newbase )
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{
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case 10:
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while( *nptr >= '0' && *nptr <= '9' )
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{
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i_value *= 10;
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i_value += ( *nptr++ - '0' );
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}
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if( endptr ) *endptr = (char *)nptr;
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break;
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case 16:
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while( (*nptr >= '0' && *nptr <= '9') ||
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(*nptr >= 'a' && *nptr <= 'f') ||
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(*nptr >= 'A' && *nptr <= 'F') )
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{
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int i_valc = 0;
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if(*nptr >= '0' && *nptr <= '9') i_valc = *nptr - '0';
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else if(*nptr >= 'a' && *nptr <= 'f') i_valc = *nptr - 'a' +10;
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else if(*nptr >= 'A' && *nptr <= 'F') i_valc = *nptr - 'A' +10;
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i_value *= 16;
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i_value += i_valc;
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nptr++;
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}
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if( endptr ) *endptr = (char *)nptr;
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break;
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default:
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i_value = strtol( nptr, endptr, newbase );
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break;
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}
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return i_value * sign;
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}
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