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sortix--sortix/libmaxsi/strspn.cpp
Jonas 'Sortie' Termansen 87c8120b95 Refactored libmaxsi/string.cpp into multiple files.
However, parts libmaxsi/string.cpp remains as the kernel and parts of the
standard library still rely on <libmaxsi/string.h>.
2012-07-26 14:17:56 +02:00

44 lines
1.4 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
This file is part of LibMaxsi.
LibMaxsi is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
LibMaxsi 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 Lesser General Public License for more
details.
You should have received a copy of the GNU Lesser General Public License
along with LibMaxsi. If not, see <http://www.gnu.org/licenses/>.
strspn.cpp
Search a string for a set of characters.
*******************************************************************************/
#include <string.h>
extern "C" size_t strspn(const char* str, const char* accept)
{
size_t acceptlen = 0;
while ( accept[acceptlen] ) { acceptlen++; }
for ( size_t result = 0; true; result++ )
{
char c = str[result];
if ( !c ) { return result; }
bool matches = false;
for ( size_t i = 0; i < acceptlen; i++ )
{
if ( str[result] != accept[i] ) { continue; }
matches = true;
break;
}
if ( !matches ) { return result; }
}
}