1 /***************************************
2 $Header: /home/amb/routino/src/RCS/ways.h,v 1.42 2010/08/30 12:32:07 amb Exp $
4 A header file for the ways.
6 Part of the Routino routing software.
7 ******************/ /******************
8 This file Copyright 2008-2010 Andrew M. Bishop
10 This program is free software: you can redistribute it and/or modify
11 it under the terms of the GNU Affero General Public License as published by
12 the Free Software Foundation, either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU Affero General Public License for more details.
20 You should have received a copy of the GNU Affero General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 ***************************************/
26 #define WAYS_H /*+ To stop multiple inclusions. +*/
39 /*+ A structure containing a single way (members ordered to minimise overall size). +*/
42 index_t name; /*+ The offset of the name of the way in the names array. +*/
44 allow_t allow; /*+ The type of traffic allowed on the way. +*/
46 waytype_t type; /*+ The highway type of the way. +*/
48 wayprop_t props; /*+ The properties of the way. +*/
50 speed_t speed; /*+ The defined maximum speed limit of the way. +*/
52 weight_t weight; /*+ The defined maximum weight of traffic on the way. +*/
53 height_t height; /*+ The defined maximum height of traffic on the way. +*/
54 width_t width; /*+ The defined maximum width of traffic on the way. +*/
55 length_t length; /*+ The defined maximum length of traffic on the way. +*/
59 /*+ A structure containing the header from the file. +*/
60 typedef struct _WaysFile
62 index_t number; /*+ How many ways are stored? +*/
63 index_t onumber; /*+ How many ways were there originally? +*/
65 allow_t allow; /*+ The types of traffic that were seen when parsing. +*/
66 wayprop_t props; /*+ The properties that were seen when parsing. +*/
71 /*+ A structure containing a set of ways (and pointers to mmap file). +*/
74 WaysFile file; /*+ The header data from the file. +*/
78 void *data; /*+ The memory mapped data. +*/
80 Way *ways; /*+ An array of ways. +*/
81 char *names; /*+ An array of characters containing the names. +*/
85 int fd; /*+ The file descriptor for the file. +*/
86 off_t namesoffset; /*+ The offset of the names within the file. +*/
88 Way wcached[2]; /*+ The cached ways. +*/
90 char *ncached; /*+ The cached way name. +*/
91 index_t nincache; /*+ The index of the cached way name. +*/
92 int nalloc; /*+ The amount of memory allocated for the way name. +*/
100 Ways *LoadWayList(const char *filename);
102 int WaysCompare(Way *way1,Way *way2);
105 /* Macros and inline functions */
109 /*+ Return a Way* pointer given a set of ways and an index. +*/
110 #define LookupWay(xxx,yyy,zzz) (&(xxx)->ways[yyy])
112 /*+ Return the name of a way given the Way pointer and a set of ways. +*/
113 #define WayName(xxx,yyy) (&(xxx)->names[(yyy)->name])
117 static Way *LookupWay(Ways *ways,index_t index,int position);
119 static char *WayName(Ways *ways,Way *way);
122 /*++++++++++++++++++++++++++++++++++++++
123 Find the Way information for a particular way.
125 Way *LookupWay Returns a pointer to the cached way information.
127 Ways *ways The ways structure to use.
129 index_t index The index of the way.
131 int position The position in the cache to store the value.
132 ++++++++++++++++++++++++++++++++++++++*/
134 static inline Way *LookupWay(Ways *ways,index_t index,int position)
136 SeekFile(ways->fd,sizeof(WaysFile)+(off_t)index*sizeof(Way));
138 ReadFile(ways->fd,&ways->wcached[position-1],sizeof(Way));
140 return(&ways->wcached[position-1]);
144 /*++++++++++++++++++++++++++++++++++++++
145 Find the name of a way.
147 char *WayName Returns a pointer to the name of the way.
149 Ways *ways The ways structure to use.
151 Way *way The Way pointer.
152 ++++++++++++++++++++++++++++++++++++++*/
154 static inline char *WayName(Ways *ways,Way *way)
158 if(way->name==ways->nincache)
159 return(ways->ncached);
161 SeekFile(ways->fd,ways->namesoffset+way->name);
164 ways->ncached=(char*)malloc(32);
169 int m=ReadFile(ways->fd,ways->ncached+n,32);
175 if(ways->ncached[i]==0)
180 ways->ncached=(char*)realloc((void*)ways->ncached,n+32);
185 return(ways->ncached);