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 
43 class Bin
44 { /* a linked list of jordan arcs */
45 private:
46     Arc_ptr head;/*first arc on list */
47     Arc_ptr		current;	/* current arc on list */
48 public:
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 
69 inline void
70 Bin::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 
81 inline Arc_ptr
82 Bin::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 
96 inline Arc_ptr
97 Bin::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 
114 inline Arc_ptr
115 Bin::firstarc( void )
116 {
117     current = head;
118     return nextarc( );
119 }
120 
121 #endif /* __glubin_h_ */
122