bin.h revision f220fa62 
1/*
2 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
3 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice including the dates of first publication and
13 * either this permission notice or a reference to
14 * http://oss.sgi.com/projects/FreeB/
15 * shall be included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
21 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
22 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 *
25 * Except as contained in this notice, the name of Silicon Graphics, Inc.
26 * shall not be used in advertising or otherwise to promote the sale, use or
27 * other dealings in this Software without prior written authorization from
28 * Silicon Graphics, Inc.
29 */
30
31/*
32 * bin.h
33 *
34 */
35
36#ifndef __glubin_h_
37#define __glubin_h_
38
39#include "myassert.h"
40#include "arc.h"
41#include "defines.h"
42
43class Bin
44{ /* a linked list of jordan arcs */
45private:
46    Arc_ptr head;/*first arc on list */
47    Arc_ptr		current;	/* current arc on list */
48public:
49    			Bin();
50			~Bin();
51    inline Arc_ptr	firstarc( void );
52    inline Arc_ptr	nextarc( void );
53    inline Arc_ptr	removearc( void );
54    inline int		isnonempty( void ) { return (head ? 1 : 0); }
55    inline void		addarc( Arc_ptr );
56    void 		remove_this_arc( Arc_ptr );
57    int			numarcs( void );
58    void 		adopt( void );
59    void		markall( void );
60    void		show( const char * );
61    void		listBezier( void );
62};
63
64/*----------------------------------------------------------------------------
65 * Bin::addarc - add an Arc_ptr to head of linked list of Arc_ptr
66 *----------------------------------------------------------------------------
67 */
68
69inline void
70Bin::addarc( Arc_ptr jarc )
71{
72   jarc->link = head;
73   head = jarc;
74}
75
76/*----------------------------------------------------------------------------
77 * Bin::removearc - remove first Arc_ptr from bin
78 *----------------------------------------------------------------------------
79 */
80
81inline Arc_ptr
82Bin::removearc( void )
83{
84    Arc_ptr jarc = head;
85
86    if( jarc ) head = jarc->link;
87    return jarc;
88}
89
90
91/*----------------------------------------------------------------------------
92 * BinIter::nextarc - return current arc in bin and advance pointer to next arc
93 *----------------------------------------------------------------------------
94 */
95
96inline Arc_ptr
97Bin::nextarc( void )
98{
99    Arc_ptr jarc = current;
100
101#ifdef DEBUG
102    assert( jarc->check() != 0 );
103#endif
104
105    if( jarc ) current = jarc->link;
106    return jarc;
107}
108
109/*----------------------------------------------------------------------------
110 * BinIter::firstarc - set current arc to first arc of bin advance to next arc
111 *----------------------------------------------------------------------------
112 */
113
114inline Arc_ptr
115Bin::firstarc( void )
116{
117    current = head;
118    return nextarc( );
119}
120
121#endif /* __glubin_h_ */
122