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author | marha <marha@users.sourceforge.net> | 2012-09-03 09:54:39 +0200 |
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committer | marha <marha@users.sourceforge.net> | 2012-09-03 09:54:39 +0200 |
commit | b86e8562b1ddca2a8bc29f22a79451a041bf5293 (patch) | |
tree | 60fead0638fce6922b4043767fa991ff1f0e3488 /mesalib/src/glu/sgi/libtess/priorityq.c | |
parent | 53192e17e55aa9ed3e3721bf4fdcb2b01a595202 (diff) | |
download | vcxsrv-b86e8562b1ddca2a8bc29f22a79451a041bf5293.tar.gz vcxsrv-b86e8562b1ddca2a8bc29f22a79451a041bf5293.tar.bz2 vcxsrv-b86e8562b1ddca2a8bc29f22a79451a041bf5293.zip |
mesa xkeyboard-config git update 3 sep 2012
Diffstat (limited to 'mesalib/src/glu/sgi/libtess/priorityq.c')
-rw-r--r-- | mesalib/src/glu/sgi/libtess/priorityq.c | 260 |
1 files changed, 0 insertions, 260 deletions
diff --git a/mesalib/src/glu/sgi/libtess/priorityq.c b/mesalib/src/glu/sgi/libtess/priorityq.c deleted file mode 100644 index c6b99cce5..000000000 --- a/mesalib/src/glu/sgi/libtess/priorityq.c +++ /dev/null @@ -1,260 +0,0 @@ -/* - * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008) - * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice including the dates of first publication and - * either this permission notice or a reference to - * http://oss.sgi.com/projects/FreeB/ - * shall be included in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, - * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF - * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - * - * Except as contained in this notice, the name of Silicon Graphics, Inc. - * shall not be used in advertising or otherwise to promote the sale, use or - * other dealings in this Software without prior written authorization from - * Silicon Graphics, Inc. - */ -/* -** Author: Eric Veach, July 1994. -** -*/ - -#include "gluos.h" -#include <stddef.h> -#include <assert.h> -#include <limits.h> /* LONG_MAX */ -#include "memalloc.h" - -/* Include all the code for the regular heap-based queue here. */ - -#include "priorityq-heap.c" - -/* Now redefine all the function names to map to their "Sort" versions. */ - -#include "priorityq-sort.h" - -/* really __gl_pqSortNewPriorityQ */ -PriorityQ *pqNewPriorityQ( int (*leq)(PQkey key1, PQkey key2) ) -{ - PriorityQ *pq = (PriorityQ *)memAlloc( sizeof( PriorityQ )); - if (pq == NULL) return NULL; - - pq->heap = __gl_pqHeapNewPriorityQ( leq ); - if (pq->heap == NULL) { - memFree(pq); - return NULL; - } - - pq->keys = (PQHeapKey *)memAlloc( INIT_SIZE * sizeof(pq->keys[0]) ); - if (pq->keys == NULL) { - __gl_pqHeapDeletePriorityQ(pq->heap); - memFree(pq); - return NULL; - } - - pq->size = 0; - pq->max = INIT_SIZE; - pq->initialized = FALSE; - pq->leq = leq; - return pq; -} - -/* really __gl_pqSortDeletePriorityQ */ -void pqDeletePriorityQ( PriorityQ *pq ) -{ - assert(pq != NULL); - if (pq->heap != NULL) __gl_pqHeapDeletePriorityQ( pq->heap ); - if (pq->order != NULL) memFree( pq->order ); - if (pq->keys != NULL) memFree( pq->keys ); - memFree( pq ); -} - - -#define LT(x,y) (! LEQ(y,x)) -#define GT(x,y) (! LEQ(x,y)) -#define Swap(a,b) do{PQkey *tmp = *a; *a = *b; *b = tmp;}while(0) - -/* really __gl_pqSortInit */ -int pqInit( PriorityQ *pq ) -{ - PQkey **p, **r, **i, **j, *piv; - struct { PQkey **p, **r; } Stack[50], *top = Stack; - unsigned long seed = 2016473283; - - /* Create an array of indirect pointers to the keys, so that we - * the handles we have returned are still valid. - */ -/* - pq->order = (PQHeapKey **)memAlloc( (size_t) - (pq->size * sizeof(pq->order[0])) ); -*/ - pq->order = (PQHeapKey **)memAlloc( (size_t) - ((pq->size+1) * sizeof(pq->order[0])) ); -/* the previous line is a patch to compensate for the fact that IBM */ -/* machines return a null on a malloc of zero bytes (unlike SGI), */ -/* so we have to put in this defense to guard against a memory */ -/* fault four lines down. from fossum@austin.ibm.com. */ - if (pq->order == NULL) return 0; - - p = pq->order; - r = p + pq->size - 1; - for( piv = pq->keys, i = p; i <= r; ++piv, ++i ) { - *i = piv; - } - - /* Sort the indirect pointers in descending order, - * using randomized Quicksort - */ - top->p = p; top->r = r; ++top; - while( --top >= Stack ) { - p = top->p; - r = top->r; - while( r > p + 10 ) { - seed = seed * 1539415821 + 1; - i = p + seed % (r - p + 1); - piv = *i; - *i = *p; - *p = piv; - i = p - 1; - j = r + 1; - do { - do { ++i; } while( GT( **i, *piv )); - do { --j; } while( LT( **j, *piv )); - Swap( i, j ); - } while( i < j ); - Swap( i, j ); /* Undo last swap */ - if( i - p < r - j ) { - top->p = j+1; top->r = r; ++top; - r = i-1; - } else { - top->p = p; top->r = i-1; ++top; - p = j+1; - } - } - /* Insertion sort small lists */ - for( i = p+1; i <= r; ++i ) { - piv = *i; - for( j = i; j > p && LT( **(j-1), *piv ); --j ) { - *j = *(j-1); - } - *j = piv; - } - } - pq->max = pq->size; - pq->initialized = TRUE; - __gl_pqHeapInit( pq->heap ); /* always succeeds */ - -#ifndef NDEBUG - p = pq->order; - r = p + pq->size - 1; - for( i = p; i < r; ++i ) { - assert( LEQ( **(i+1), **i )); - } -#endif - - return 1; -} - -/* really __gl_pqSortInsert */ -/* returns LONG_MAX iff out of memory */ -PQhandle pqInsert( PriorityQ *pq, PQkey keyNew ) -{ - long curr; - - if( pq->initialized ) { - return __gl_pqHeapInsert( pq->heap, keyNew ); - } - curr = pq->size; - if( ++ pq->size >= pq->max ) { - PQkey *saveKey= pq->keys; - - /* If the heap overflows, double its size. */ - pq->max <<= 1; - pq->keys = (PQHeapKey *)memRealloc( pq->keys, - (size_t) - (pq->max * sizeof( pq->keys[0] ))); - if (pq->keys == NULL) { - pq->keys = saveKey; /* restore ptr to free upon return */ - return LONG_MAX; - } - } - assert(curr != LONG_MAX); - pq->keys[curr] = keyNew; - - /* Negative handles index the sorted array. */ - return -(curr+1); -} - -/* really __gl_pqSortExtractMin */ -PQkey pqExtractMin( PriorityQ *pq ) -{ - PQkey sortMin, heapMin; - - if( pq->size == 0 ) { - return __gl_pqHeapExtractMin( pq->heap ); - } - sortMin = *(pq->order[pq->size-1]); - if( ! __gl_pqHeapIsEmpty( pq->heap )) { - heapMin = __gl_pqHeapMinimum( pq->heap ); - if( LEQ( heapMin, sortMin )) { - return __gl_pqHeapExtractMin( pq->heap ); - } - } - do { - -- pq->size; - } while( pq->size > 0 && *(pq->order[pq->size-1]) == NULL ); - return sortMin; -} - -/* really __gl_pqSortMinimum */ -PQkey pqMinimum( PriorityQ *pq ) -{ - PQkey sortMin, heapMin; - - if( pq->size == 0 ) { - return __gl_pqHeapMinimum( pq->heap ); - } - sortMin = *(pq->order[pq->size-1]); - if( ! __gl_pqHeapIsEmpty( pq->heap )) { - heapMin = __gl_pqHeapMinimum( pq->heap ); - if( LEQ( heapMin, sortMin )) { - return heapMin; - } - } - return sortMin; -} - -/* really __gl_pqSortIsEmpty */ -int pqIsEmpty( PriorityQ *pq ) -{ - return (pq->size == 0) && __gl_pqHeapIsEmpty( pq->heap ); -} - -/* really __gl_pqSortDelete */ -void pqDelete( PriorityQ *pq, PQhandle curr ) -{ - if( curr >= 0 ) { - __gl_pqHeapDelete( pq->heap, curr ); - return; - } - curr = -(curr+1); - assert( curr < pq->max && pq->keys[curr] != NULL ); - - pq->keys[curr] = NULL; - while( pq->size > 0 && *(pq->order[pq->size-1]) == NULL ) { - -- pq->size; - } -} |