63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
/*
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* Copyright 2005-2007 Gerald Schmidt.
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*
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* This file is part of Xml Copy Editor.
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*
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* Xml Copy Editor is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* Xml Copy Editor 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 Xml Copy Editor; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <string>
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#include "contexthandler.h"
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ContextMatch ContextHandler::getContext (
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const char *s,
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int len,
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const char *origin,
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int context )
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{
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const char *t, *u;
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int maxrange = context * 20;
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int range = context + 1, i = 0;
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for ( t = s; t != origin; --t )
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if ( *t == ' ' || *t == '\t' || *t == '\r' || *t == '\n' )
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if ( ++i == range )
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{
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++t;
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break;
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}
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i = 0;
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for ( u = s + len; *u; ++u )
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if ( *u == ' ' || *u == '\t' || *u == '\r' || *u == '\n' )
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if ( ++i == range )
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break;
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ContextMatch match;
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// prevent excessive context
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if ( ( s - t ) < maxrange )
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match.prelog.assign ( t, s - t );
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else
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match.prelog = "...";
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match.match.assign ( s, len );
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if ( ( u - s ) < maxrange )
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match.postlog.assign ( s + len, u - ( s + len ) );
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else
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match.postlog = "...";
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return match;
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}
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