152 lines
3.9 KiB
C++
152 lines
3.9 KiB
C++
//
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// The developer of the original code and/or files is Tripwire, Inc.
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// Portions created by Tripwire, Inc. are copyright (C) 2000-2018 Tripwire,
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// Inc. Tripwire is a registered trademark of Tripwire, Inc. All rights
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// reserved.
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//
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// This program is free software. The contents of this file are subject
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// to the terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2 of the License, or (at your
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// option) any later version. You may redistribute it and/or modify it
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// only in compliance with the GNU General Public License.
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//
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// This program is distributed in the hope that it will be useful.
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// However, this program is distributed AS-IS WITHOUT ANY
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// WARRANTY; INCLUDING THE IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS
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// FOR A PARTICULAR PURPOSE. Please see the GNU General Public License
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// 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,
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// USA.
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//
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// Nothing in the GNU General Public License or any other license to use
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// the code or files shall permit you to use Tripwire's trademarks,
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// service marks, or other intellectual property without Tripwire's
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// prior written consent.
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//
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// If you have any questions, please contact Tripwire, Inc. at either
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// info@tripwire.org or www.tripwire.org.
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//
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//
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// Name....: charutil.cpp
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// Date....: 10/20/99
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// Creator.: Brian McFeely (bmcfeely)
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//
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// [Description]
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//
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#include "stdcore.h"
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#include "charutil.h"
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#include "ntmbs.h"
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#if IS_ANDROID
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int mblen(const char* s, size_t n)
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{
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return mbtowc(0, s, n);
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}
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#endif
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//
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// finds the next whole character in string identified by ['cur'-'end')
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// identifies beginning of char in 'first', then end of character in 'last'
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// returns number of TCHARs that make up the next character
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// if there are no more characters, will return 0 and first = last = end
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// POSTCONDITIONS:
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//
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// RETURNS:
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//
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// THROWS:
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//
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// COMPLEXITY:
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//
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//
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/* static */
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bool cCharUtil::PeekNextChar(const TSTRING::const_iterator& cur,
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const TSTRING::const_iterator& end,
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TSTRING::const_iterator& first,
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TSTRING::const_iterator& last)
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{
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//
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// do we have a valid string here?
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//
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if (cur > end)
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{
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return false;
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}
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if (cur == end)
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{
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first = last = end;
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return false;
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}
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if (*cur == _T('\0'))
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{
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first = last = cur;
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return false;
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}
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first = cur;
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if (!(*cur))
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{
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last = cur;
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}
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else
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{
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#if !IS_AROS
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mblen(NULL, 0);
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int len = mblen(&*cur, MB_CUR_MAX);
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if (len < 0) //invalid multibyte sequence, but let's not blow up.
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len = 1;
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last = cur + len;
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#else // AROS mblen() seems broken (as of 6/2016) so don't use it.
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last = cur + 1;
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#endif
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}
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return true;
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}
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//=============================================================================
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//
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// /* static */
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// bool cCharUtil::PopNextChar( TSTRING::const_iterator& cur,
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// const TSTRING::const_iterator& end,
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// TSTRING::const_iterator& first,
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// TSTRING::const_iterator& last )
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//-----------------------------------------------------------------------------
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// REQUIRES:
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//
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// EFFECTS:
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//
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// same as PeekNextChar but increments 'cur' to 'last'
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//
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// POSTCONDITIONS:
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//
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// RETURNS:
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//
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// THROWS:
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//
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// COMPLEXITY:
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//
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//
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/* static */
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bool cCharUtil::PopNextChar(TSTRING::const_iterator& cur,
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const TSTRING::const_iterator& end,
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TSTRING::const_iterator& first,
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TSTRING::const_iterator& last)
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{
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bool f = PeekNextChar(cur, end, first, last);
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cur = last; // pop causes 'cur' to move to just beyond character ('last')
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return f;
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}
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