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Contents of /trunk/src/waysx.h

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Revision 1167 - (show annotations) (download) (as text)
Tue Nov 20 16:21:27 2012 UTC (12 years, 3 months ago) by amb
File MIME type: text/x-chdr
File size: 4393 byte(s)
Rename the '--preserve' command line option to '--keep' for simplicity.

1 /***************************************
2 A header file for the extended Ways structure.
3
4 Part of the Routino routing software.
5 ******************/ /******************
6 This file Copyright 2008-2012 Andrew M. Bishop
7
8 This program is free software: you can redistribute it and/or modify
9 it under the terms of the GNU Affero General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU Affero General Public License for more details.
17
18 You should have received a copy of the GNU Affero General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 ***************************************/
21
22
23 #ifndef WAYSX_H
24 #define WAYSX_H /*+ To stop multiple inclusions. +*/
25
26 #include <stdint.h>
27
28 #include "types.h"
29
30 #include "typesx.h"
31 #include "ways.h"
32
33 #include "files.h"
34
35
36 /* Data structures */
37
38
39 /*+ An extended structure containing a single way. +*/
40 struct _WayX
41 {
42 way_t id; /*+ The way identifier; initially the OSM value, later the Way index. +*/
43
44 Way way; /*+ The real way data. +*/
45 };
46
47
48 /*+ A structure containing a set of ways (memory format). +*/
49 struct _WaysX
50 {
51 char *filename; /*+ The name of the intermediate file (for the WaysX). +*/
52 char *filename_tmp; /*+ The name of the temporary file (for the WaysX). +*/
53
54 int fd; /*+ The file descriptor of the open file (for the WaysX). +*/
55
56 index_t number; /*+ The number of extended ways still being considered. +*/
57
58 #if !SLIM
59
60 WayX *data; /*+ The extended ways data (when mapped into memory). +*/
61
62 #else
63
64 WayX cached[3]; /*+ Three cached extended ways read from the file in slim mode. +*/
65 index_t incache[3]; /*+ The indexes of the cached extended ways. +*/
66
67 #endif
68
69 way_t *idata; /*+ The extended way IDs (sorted by ID). +*/
70
71 index_t *cdata; /*+ The compacted way IDs (same order as sorted ways). +*/
72
73 char *nfilename_tmp; /*+ The name of the temporary file (for the WaysX names). +*/
74
75 int nfd; /*+ The file descriptor of the temporary file (for the WaysX names). +*/
76
77 uint32_t nlength; /*+ The length of the string of name entries. +*/
78 };
79
80
81 /* Functions in waysx.c */
82
83
84 WaysX *NewWayList(int append,int readonly);
85 void FreeWayList(WaysX *waysx,int keep);
86
87 void AppendWayList(WaysX *waysx,way_t id,Way *way,const char *name);
88 void FinishWayList(WaysX *waysx);
89
90 index_t IndexWayX(WaysX *waysx,way_t id);
91
92 void SortWayList(WaysX *waysx);
93
94 void ExtractWayNames(WaysX *waysx,int keep);
95
96 void CompactWayList(WaysX *waysx,SegmentsX *segmentsx);
97
98 void SaveWayList(WaysX *waysx,const char *filename);
99
100
101 /* Macros / inline functions */
102
103 #if !SLIM
104
105 #define LookupWayX(waysx,index,position) &(waysx)->data[index]
106
107 #define PutBackWayX(waysx,wayx) /* nop */
108
109 #else
110
111 static WayX *LookupWayX(WaysX *waysx,index_t index,int position);
112
113 static void PutBackWayX(WaysX *waysx,WayX *wayx);
114
115
116 /*++++++++++++++++++++++++++++++++++++++
117 Lookup a particular extended way with the specified id from the file on disk.
118
119 WayX *LookupWayX Returns a pointer to a cached copy of the extended way.
120
121 WaysX *waysx The set of ways to use.
122
123 index_t index The way index to look for.
124
125 int position The position in the cache to use.
126 ++++++++++++++++++++++++++++++++++++++*/
127
128 static inline WayX *LookupWayX(WaysX *waysx,index_t index,int position)
129 {
130 SeekReadFile(waysx->fd,&waysx->cached[position-1],sizeof(WayX),(off_t)index*sizeof(WayX));
131
132 waysx->incache[position-1]=index;
133
134 return(&waysx->cached[position-1]);
135 }
136
137
138 /*++++++++++++++++++++++++++++++++++++++
139 Put back an extended way's data into the file on disk.
140
141 WaysX *waysx The set of ways to use.
142
143 WayX *wayx The extended way to be put back.
144 ++++++++++++++++++++++++++++++++++++++*/
145
146 static inline void PutBackWayX(WaysX *waysx,WayX *wayx)
147 {
148 int position1=wayx-&waysx->cached[0];
149
150 SeekWriteFile(waysx->fd,&waysx->cached[position1],sizeof(WayX),(off_t)waysx->incache[position1]*sizeof(WayX));
151 }
152
153 #endif /* SLIM */
154
155
156 #endif /* WAYSX_H */

Properties

Name Value
cvs:description Extended ways header.