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