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Annotation of embedaddon/sqlite3/ext/rtree/sqlite3rtree.h, revision 1.1.1.1

1.1       misho       1: /*
                      2: ** 2010 August 30
                      3: **
                      4: ** The author disclaims copyright to this source code.  In place of
                      5: ** a legal notice, here is a blessing:
                      6: **
                      7: **    May you do good and not evil.
                      8: **    May you find forgiveness for yourself and forgive others.
                      9: **    May you share freely, never taking more than you give.
                     10: **
                     11: *************************************************************************
                     12: */
                     13: 
                     14: #ifndef _SQLITE3RTREE_H_
                     15: #define _SQLITE3RTREE_H_
                     16: 
                     17: #include <sqlite3.h>
                     18: 
                     19: #ifdef __cplusplus
                     20: extern "C" {
                     21: #endif
                     22: 
                     23: typedef struct sqlite3_rtree_geometry sqlite3_rtree_geometry;
                     24: 
                     25: /*
                     26: ** Register a geometry callback named zGeom that can be used as part of an
                     27: ** R-Tree geometry query as follows:
                     28: **
                     29: **   SELECT ... FROM <rtree> WHERE <rtree col> MATCH $zGeom(... params ...)
                     30: */
                     31: int sqlite3_rtree_geometry_callback(
                     32:   sqlite3 *db,
                     33:   const char *zGeom,
                     34:   int (*xGeom)(sqlite3_rtree_geometry *, int nCoord, double *aCoord, int *pRes),
                     35:   void *pContext
                     36: );
                     37: 
                     38: 
                     39: /*
                     40: ** A pointer to a structure of the following type is passed as the first
                     41: ** argument to callbacks registered using rtree_geometry_callback().
                     42: */
                     43: struct sqlite3_rtree_geometry {
                     44:   void *pContext;                 /* Copy of pContext passed to s_r_g_c() */
                     45:   int nParam;                     /* Size of array aParam[] */
                     46:   double *aParam;                 /* Parameters passed to SQL geom function */
                     47:   void *pUser;                    /* Callback implementation user data */
                     48:   void (*xDelUser)(void *);       /* Called by SQLite to clean up pUser */
                     49: };
                     50: 
                     51: 
                     52: #ifdef __cplusplus
                     53: }  /* end of the 'extern "C"' block */
                     54: #endif
                     55: 
                     56: #endif  /* ifndef _SQLITE3RTREE_H_ */