/***************************************
- $Header: /home/amb/routino/src/RCS/ways.h,v 1.37 2010/05/29 13:54:24 amb Exp $
+ $Header: /home/amb/routino/src/RCS/ways.h,v 1.42 2010/08/30 12:32:07 amb Exp $
A header file for the ways.
#define WAYS_H /*+ To stop multiple inclusions. +*/
#include <stdint.h>
+#include <stdlib.h>
#include "types.h"
+#include "files.h"
+
/* Data structures */
{
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. +*/
+ allow_t allow; /*+ The type of traffic allowed on the way. +*/
waytype_t type; /*+ The highway type of the way. +*/
};
-/*+ A structure containing a set of ways (mmap format). +*/
-struct _Ways
+/*+ A structure containing the header from the file. +*/
+typedef struct _WaysFile
{
- uint32_t number; /*+ How many ways are stored? +*/
- uint32_t onumber; /*+ How many ways were there originally? +*/
+ 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. +*/
+ allow_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. +*/
- void *data; /*+ The memory mapped data. +*/
+#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
};
-/* Macros */
+/* Functions */
+
+Ways *LoadWayList(const char *filename);
+
+int WaysCompare(Way *way1,Way *way2);
+
+
+/* Macros and inline functions */
+#if !SLIM
/*+ Return a Way* pointer given a set of ways and an index. +*/
-#define LookupWay(xxx,yyy) (&(xxx)->ways[yyy])
+#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])
+/*+ Return the name of a way given the Way pointer and a set of ways. +*/
+#define WayName(xxx,yyy) (&(xxx)->names[(yyy)->name])
-/*+ Decide if a way has a name or not. +*/
-#define WayNamed(xxx,yyy) ((xxx)->names[(yyy)->name])
+#else
-/*+ 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)))
+static Way *LookupWay(Ways *ways,index_t index,int position);
+static char *WayName(Ways *ways,Way *way);
-/* Functions */
+/*++++++++++++++++++++++++++++++++++++++
+ Find the Way information for a particular way.
-Ways *LoadWayList(const char *filename);
+ Way *LookupWay Returns a pointer to the cached way information.
-int WaysCompare(Way *way1,Way *way2);
+ 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 *WayName Returns a pointer to the name of the way.
+
+ Ways *ways The ways structure to use.
+
+ Way *way The Way pointer.
+ ++++++++++++++++++++++++++++++++++++++*/
+
+static inline char *WayName(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);
+}
+
+#endif
#endif /* WAYS_H */
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