71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
/*
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Copyright 2015-2016 Amebis
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This file is part of ZRCola.
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ZRCola is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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ZRCola is distributed in the hope that it will be useful, but
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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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You should have received a copy of the GNU General Public License
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along with ZRCola. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "stdafx.h"
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size_t ZRCola::mapping_vector::to_composed(_In_ size_t decmp) const
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{
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for (size_type l = 0, r = size();;) {
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if (l < r) {
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size_type m = (l + r) / 2;
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const mapping &el = (*this)[m];
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if (decmp < el.decmp) r = m;
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else if (el.decmp < decmp) l = m + 1;
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else {
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// An exact match found.
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return el.cmp;
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}
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} else if (l) {
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// We found a map interval.
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const mapping &el = (*this)[l - 1];
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return el.cmp + (decmp - el.decmp);
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} else {
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// The decomposed character index is far left.
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return decmp;
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}
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}
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}
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size_t ZRCola::mapping_vector::to_decomposed(_In_ size_t cmp) const
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{
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for (size_type l = 0, r = size();;) {
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if (l < r) {
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size_type m = (l + r) / 2;
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const mapping &el = (*this)[m];
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if (cmp < el.cmp) r = m;
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else if (el.cmp < cmp) l = m + 1;
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else {
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// An exact match found.
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return el.decmp;
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}
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} else if (l) {
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// We found a map interval.
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const mapping &el = (*this)[l - 1];
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return el.decmp + (cmp - el.cmp);
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} else {
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// The composed character index is far left.
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return cmp;
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}
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}
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}
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