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Comment:Add file sqlite3rtree.h.
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SHA1:e1d9ffce0f84469eeb926f50030cb772de98a652
User & Date: dan 2010-08-30 11:34:40
Context
2010-08-30
15:02
Remove the sqlite3BtreeFactory() wrapper routine. All modules now call sqlite3BtreeOpen() directly. check-in: 0900e353 user: drh tags: trunk
11:34
Add file sqlite3rtree.h. check-in: e1d9ffce user: dan tags: trunk
01:17
Updates to comments on the VDBE opcodes. check-in: 49c05b4e user: drh tags: trunk
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Added ext/rtree/sqlite3rtree.h.





















































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#include <sqlite3.h>

typedef struct RtreeGeometry RtreeGeometry;

struct RtreeGeometry {
  void *pContext;                 /* Copy of pContext passed to s_r_g_c() */
  int nParam;                     /* Size of array aParam[] */
  double *aParam;                 /* Parameters passed to SQL geom function */
  void *pUser;                    /* Callback implementation user data */
  void (*xDelUser)(void *);       /* Called by SQLite to clean up pUser */
};

/*
** Register a geometry callback named zGeom that can be used as part of an
** R-Tree geometry query as follows:
**
**   SELECT ... FROM <rtree> WHERE <rtree> MATCH $zGeom(... params ...)
*/
int sqlite3_rtree_geometry_callback(
  sqlite3 *db,
  const char *zGeom,
  int (*xGeom)(RtreeGeometry *, int nCoord, double *aCoord, int *piResOut),
  void *pContext
);