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165 lines
3.4 KiB
165 lines
3.4 KiB
/*==LICENSE==* |
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CyanWorlds.com Engine - MMOG client, server and tools |
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Copyright (C) 2011 Cyan Worlds, Inc. |
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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 3 of the License, or |
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(at your option) any later version. |
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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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You should have received a copy of the GNU General Public License |
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along with this program. If not, see <http://www.gnu.org/licenses/>. |
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You can contact Cyan Worlds, Inc. by email legal@cyan.com |
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or by snail mail at: |
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Cyan Worlds, Inc. |
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14617 N Newport Hwy |
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Mead, WA 99021 |
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*==LICENSE==*/ |
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#include "hsTypes.h" |
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#include "hsMemory.h" |
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#include "hsRadixSort.h" |
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hsRadixSort::hsRadixSort() |
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{ |
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HSMemory::Clear(fHeads, 256*sizeof(Elem*)); |
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HSMemory::Clear(fTails, 256*sizeof(Elem*)); |
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} |
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void hsRadixSort::ILink(Elem*& head, Elem*& tail, int i) |
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{ |
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if( fHeads[i] ) |
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{ |
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if( !head ) |
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head = fHeads[i]; |
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else |
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tail->fNext = fHeads[i]; |
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tail = fTails[i]; |
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} |
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fHeads[i] = fTails[i] = nil; |
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} |
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void hsRadixSort::ISlot(Elem* in, int i) |
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{ |
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if( !fTails[i] ) |
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fHeads[i] = in; |
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else |
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fTails[i]->fNext = in; |
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in->fNext = nil; |
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fTails[i] = in; |
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} |
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void hsRadixSort::ICollapse() |
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{ |
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Elem* head = nil; |
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Elem* tail = nil; |
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int i; |
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for( i = 0; i < 256; i++ ) |
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ILink(head, tail, i); |
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fList = head; |
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} |
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void hsRadixSort::IUnPackSignedInt() |
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{ |
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Elem* head = nil; |
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Elem* tail = nil; |
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int i; |
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for( i = 128; i < 256; i++ ) |
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ILink(head, tail, i); |
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for( i = 0; i < 128; i++ ) |
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ILink(head, tail, i); |
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fList = head; |
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} |
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void hsRadixSort::IUnPackFloat() |
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{ |
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Elem* head = nil; |
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Elem* tail = nil; |
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int i; |
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for( i = 128; i < 256; i++ ) |
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ILink(head, tail, i); |
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fList = head; |
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head = tail; |
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tail = fList; |
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IReverse(); |
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for( i = 0; i < 128; i++ ) |
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ILink(head, tail, i); |
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fList = head; |
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} |
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void hsRadixSort::IReverse() |
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{ |
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if( !(fList && fList->fNext) ) |
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return; |
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Elem* p = fList->fNext; |
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fList->fNext = nil; |
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while( p ) |
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{ |
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Elem* n = p->fNext; |
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p->fNext = fList; |
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fList = p; |
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p = n; |
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} |
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} |
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hsRadixSort::Elem* hsRadixSort::Sort(Elem* inList, UInt32 flags) |
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{ |
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if( !(inList && inList->fNext) ) |
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return inList; |
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fList = inList; |
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Elem* p; |
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Elem* n; |
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for( p = fList, n = p->fNext; n; p = n, n = p->fNext ) |
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ISlot(p, p->fKey.fLong & 0xff); |
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ISlot(p, p->fKey.fLong & 0xff); |
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ICollapse(); |
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for( p = fList, n = p->fNext; n; p = n, n = p->fNext ) |
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ISlot(p, (p->fKey.fLong >> 8) & 0xff); |
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ISlot(p, (p->fKey.fLong >> 8) & 0xff); |
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ICollapse(); |
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for( p = fList, n = p->fNext; n; p = n, n = p->fNext ) |
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ISlot(p, (p->fKey.fLong >> 16) & 0xff); |
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ISlot(p, (p->fKey.fLong >> 16) & 0xff); |
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ICollapse(); |
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for( p = fList, n = p->fNext; n; p = n, n = p->fNext ) |
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ISlot(p, (p->fKey.fLong >> 24) & 0xff); |
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ISlot(p, (p->fKey.fLong >> 24) & 0xff); |
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if( flags & kSignedInt ) |
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IUnPackSignedInt(); |
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else if( flags & kUnsigned ) |
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ICollapse(); |
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else |
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IUnPackFloat(); |
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if( flags & kReverse ) |
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IReverse(); |
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return fList; |
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}
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