trunk/src/ways.h

/***************************************
 $Header: /home/amb/CVS/routino/src/ways.h,v 1.40 2010-07-31 14:36:15 amb Exp $

 A header file for the ways.

 Part of the Routino routing software.
 ******************/ /******************
 This file Copyright 2008-2010 Andrew M. Bishop

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU Affero General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU Affero General Public License for more details.

 You should have received a copy of the GNU Affero General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ***************************************/


#ifndef WAYS_H
#define WAYS_H    /*+ To stop multiple inclusions. +*/

#include <stdint.h>
#include <stdlib.h>

#include "types.h"

#include "files.h"


/* Data structures */


/*+ A structure containing a single way (members ordered to minimise overall size). +*/
struct _Way
{
 index_t    name;               /*+ The offset of the name of the way in the names array. +*/

 wayallow_t allow;              /*+ The type of traffic allowed on the way. +*/

 waytype_t  type;               /*+ The highway type of the way. +*/

 wayprop_t  props;              /*+ The properties of the way. +*/

 speed_t    speed;              /*+ The defined maximum speed limit of the way. +*/

 weight_t   weight;             /*+ The defined maximum weight of traffic on the way. +*/
 height_t   height;             /*+ The defined maximum height of traffic on the way. +*/
 width_t    width;              /*+ The defined maximum width of traffic on the way. +*/
 length_t   length;             /*+ The defined maximum length of traffic on the way. +*/
};


/*+ A structure containing the header from the file. +*/
typedef struct _WaysFile
{
 index_t    number;             /*+ How many ways are stored? +*/
 index_t    onumber;            /*+ How many ways were there originally? +*/

 wayallow_t allow;              /*+ The types of traffic that were seen when parsing. +*/
 wayprop_t  props;              /*+ The properties that were seen when parsing. +*/
}
 WaysFile;


/*+ A structure containing a set of ways (and pointers to mmap file). +*/
struct _Ways
{
 WaysFile file;                 /*+ The header data from the file. +*/

#if !SLIM

 void      *data;               /*+ The memory mapped data. +*/

 Way       *ways;               /*+ An array of ways. +*/
 char      *names;              /*+ An array of characters containing the names. +*/

#else

 int        fd;                 /*+ The file descriptor for the file. +*/
 off_t      namesoffset;        /*+ The offset of the names within the file. +*/

 Way        wcached[2];         /*+ The cached ways. +*/

 char      *ncached;            /*+ The cached way name. +*/
 index_t    nincache;           /*+ The index of the cached way name. +*/
 int        nalloc;             /*+ The amount of memory allocated for the way name. +*/

#endif
};


/* Functions */

Ways *LoadWayList(const char *filename);

int WaysCompare(Way *way1,Way *way2);


/* Macros and inline functions */

/*+ Return the name of a way if it has one or the name of the highway type otherwise. +*/
#define WayNameHighway(xxx,yyy)    (WayNamed(xxx,yyy)?WayNameRaw(xxx,yyy):HighwayName(HIGHWAY(yyy->type)))

#if !SLIM

/*+ Return a Way* pointer given a set of ways and an index. +*/
#define LookupWay(xxx,yyy,zzz)     (&(xxx)->ways[yyy])

/*+ Return the raw name of a way given the Way pointer and a set of ways. +*/
#define WayNameRaw(xxx,yyy)        (&(xxx)->names[(yyy)->name])

/*+ Decide if a way has a name or not. +*/
#define WayNamed(xxx,yyy)          ((xxx)->names[(yyy)->name])

#else

static Way *LookupWay(Ways *ways,index_t index,int position);

static char *WayNameRaw(Ways *ways,Way *way);

static int WayNamed(Ways *ways,Way *way);


/*++++++++++++++++++++++++++++++++++++++
  Find the Way information for a particular way.

  Way *LookupWay Returns a pointer to the cached way information.

  Ways *ways The ways structure to use.

  index_t index The index of the way.

  int position The position in the cache to store the value.
  ++++++++++++++++++++++++++++++++++++++*/

static inline Way *LookupWay(Ways *ways,index_t index,int position)
{
 SeekFile(ways->fd,sizeof(WaysFile)+(off_t)index*sizeof(Way));

 ReadFile(ways->fd,&ways->wcached[position-1],sizeof(Way));

 return(&ways->wcached[position-1]);
}


/*++++++++++++++++++++++++++++++++++++++
  Find the name of a way.

  char *WayNameRaw Returns a pointer to the name of the way.

  Ways *ways The ways structure to use.

  Way *way The Way pointer.
  ++++++++++++++++++++++++++++++++++++++*/

static inline char *WayNameRaw(Ways *ways,Way *way)
{
 int n=0;

 if(way->name==ways->nincache)
    return(ways->ncached);

 SeekFile(ways->fd,ways->namesoffset+way->name);

 if(!ways->ncached)
    ways->ncached=(char*)malloc(32);

 while(1)
   {
    int i;
    int m=ReadFile(ways->fd,ways->ncached+n,32);

    if(m<0)
       break;
    
    for(i=n;i<n+32;i++)
       if(ways->ncached[i]==0)
          goto exitloop;

    n+=32;

    ways->ncached=(char*)realloc((void*)ways->ncached,n+32);
   }

 exitloop:

 return(ways->ncached);
}


/*++++++++++++++++++++++++++++++++++++++
  Check if a way has a name.

  int WayNamed Returns a pointer to the name of the way.

  Ways *ways The ways structure to use.

  Way *way The Way pointer.
  ++++++++++++++++++++++++++++++++++++++*/

static inline int WayNamed(Ways *ways,Way *way)
{
 if(way->name!=ways->nincache)
    WayNameRaw(ways,way);

 return(ways->ncached[0]);
}

#endif


#endif /* WAYS_H */
1	/***************************************
2	$Header: /home/amb/CVS/routino/src/ways.h,v 1.40 2010-07-31 14:36:15 amb Exp $
3
4	A header file for the ways.
5
6	Part of the Routino routing software.
7	****************/ /****************
8	This file Copyright 2008-2010 Andrew M. Bishop
9
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.
14
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.
19
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	***************************************/
23
24
25	#ifndef WAYS_H
26	#define WAYS_H /+ To stop multiple inclusions. +/
27
28	#include <stdint.h>
29	#include <stdlib.h>
30
31	#include "types.h"
32
33	#include "files.h"
34
35
36	/* Data structures */
37
38
39	/+ A structure containing a single way (members ordered to minimise overall size). +/
40	struct _Way
41	{
42	index_t name; /+ The offset of the name of the way in the names array. +/
43
44	wayallow_t allow; /+ The type of traffic allowed on the way. +/
45
46	waytype_t type; /+ The highway type of the way. +/
47
48	wayprop_t props; /+ The properties of the way. +/
49
50	speed_t speed; /+ The defined maximum speed limit of the way. +/
51
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. +/
56	};
57
58
59	/+ A structure containing the header from the file. +/
60	typedef struct _WaysFile
61	{
62	index_t number; /+ How many ways are stored? +/
63	index_t onumber; /+ How many ways were there originally? +/
64
65	wayallow_t allow; /+ The types of traffic that were seen when parsing. +/
66	wayprop_t props; /+ The properties that were seen when parsing. +/
67	}
68	WaysFile;
69
70
71	/+ A structure containing a set of ways (and pointers to mmap file). +/
72	struct _Ways
73	{
74	WaysFile file; /+ The header data from the file. +/
75
76	#if !SLIM
77
78	void data; /+ The memory mapped data. +*/
79
80	Way ways; /+ An array of ways. +*/
81	char names; /+ An array of characters containing the names. +*/
82
83	#else
84
85	int fd; /+ The file descriptor for the file. +/
86	off_t namesoffset; /+ The offset of the names within the file. +/
87
88	Way wcached[2]; /+ The cached ways. +/
89
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. +/
93
94	#endif
95	};
96
97
98	/* Functions */
99
100	Ways LoadWayList(const char filename);
101
102	int WaysCompare(Way way1,Way way2);
103
104
105	/* Macros and inline functions */
106
107	/+ Return the name of a way if it has one or the name of the highway type otherwise. +/
108	#define WayNameHighway(xxx,yyy) (WayNamed(xxx,yyy)?WayNameRaw(xxx,yyy):HighwayName(HIGHWAY(yyy->type)))
109
110	#if !SLIM
111
112	/+ Return a Way pointer given a set of ways and an index. +*/
113	#define LookupWay(xxx,yyy,zzz) (&(xxx)->ways[yyy])
114
115	/+ Return the raw name of a way given the Way pointer and a set of ways. +/
116	#define WayNameRaw(xxx,yyy) (&(xxx)->names[(yyy)->name])
117
118	/+ Decide if a way has a name or not. +/
119	#define WayNamed(xxx,yyy) ((xxx)->names[(yyy)->name])
120
121	#else
122
123	static Way LookupWay(Ways ways,index_t index,int position);
124
125	static char WayNameRaw(Ways ways,Way *way);
126
127	static int WayNamed(Ways ways,Way way);
128
129
130	/*++++++++++++++++++++++++++++++++++++++
131	Find the Way information for a particular way.
132
133	Way *LookupWay Returns a pointer to the cached way information.
134
135	Ways *ways The ways structure to use.
136
137	index_t index The index of the way.
138
139	int position The position in the cache to store the value.
140	++++++++++++++++++++++++++++++++++++++*/
141
142	static inline Way LookupWay(Ways ways,index_t index,int position)
143	{
144	SeekFile(ways->fd,sizeof(WaysFile)+(off_t)index*sizeof(Way));
145
146	ReadFile(ways->fd,&ways->wcached[position-1],sizeof(Way));
147
148	return(&ways->wcached[position-1]);
149	}
150
151
152	/*++++++++++++++++++++++++++++++++++++++
153	Find the name of a way.
154
155	char *WayNameRaw Returns a pointer to the name of the way.
156
157	Ways *ways The ways structure to use.
158
159	Way *way The Way pointer.
160	++++++++++++++++++++++++++++++++++++++*/
161
162	static inline char WayNameRaw(Ways ways,Way *way)
163	{
164	int n=0;
165
166	if(way->name==ways->nincache)
167	return(ways->ncached);
168
169	SeekFile(ways->fd,ways->namesoffset+way->name);
170
171	if(!ways->ncached)
172	ways->ncached=(char*)malloc(32);
173
174	while(1)
175	{
176	int i;
177	int m=ReadFile(ways->fd,ways->ncached+n,32);
178
179	if(m<0)
180	break;
181
182	for(i=n;i<n+32;i++)
183	if(ways->ncached[i]==0)
184	goto exitloop;
185
186	n+=32;
187
188	ways->ncached=(char)realloc((void)ways->ncached,n+32);
189	}
190
191	exitloop:
192
193	return(ways->ncached);
194	}
195
196
197	/*++++++++++++++++++++++++++++++++++++++
198	Check if a way has a name.
199
200	int WayNamed Returns a pointer to the name of the way.
201
202	Ways *ways The ways structure to use.
203
204	Way *way The Way pointer.
205	++++++++++++++++++++++++++++++++++++++*/
206
207	static inline int WayNamed(Ways ways,Way way)
208	{
209	if(way->name!=ways->nincache)
210	WayNameRaw(ways,way);
211
212	return(ways->ncached[0]);
213	}
214
215	#endif
216
217
218	#endif /* WAYS_H */