static void do_geojson_test(char * in, char * out, char * srs, int precision, int has_bbox) { LWGEOM *g; char * h; g = lwgeom_from_wkt(in, LW_PARSER_CHECK_NONE); h = lwgeom_to_geojson(g, srs, precision, has_bbox); if (strcmp(h, out)) fprintf(stderr, "\nIn: %s\nOut: %s\nTheo: %s\n", in, h, out); CU_ASSERT_STRING_EQUAL(h, out); lwgeom_free(g); lwfree(h); }
static void do_geojson_unsupported(char * in, char * out) { LWGEOM *g; char *h; g = lwgeom_from_wkt(in, LW_PARSER_CHECK_NONE); h = lwgeom_to_geojson(g, NULL, 0, 0); if (strcmp(cu_error_msg, out)) fprintf(stderr, "\nIn: %s\nOut: %s\nTheo: %s\n", in, cu_error_msg, out); CU_ASSERT_STRING_EQUAL(out, cu_error_msg); cu_error_msg_reset(); lwfree(h); lwgeom_free(g); }
Datum geography_as_geojson(PG_FUNCTION_ARGS) { LWGEOM *lwgeom = NULL; GSERIALIZED *g = NULL; char *geojson; text *result; int version; int option = 0; int has_bbox = 0; int precision = OUT_MAX_DOUBLE_PRECISION; char * srs = NULL; /* Get the version */ version = PG_GETARG_INT32(0); if ( version != 1) { elog(ERROR, "Only GeoJSON 1 is supported"); PG_RETURN_NULL(); } /* Get the geography */ if (PG_ARGISNULL(1) ) PG_RETURN_NULL(); g = (GSERIALIZED*)PG_DETOAST_DATUM(PG_GETARG_DATUM(1)); /* Convert to lwgeom so we can run the old functions */ lwgeom = lwgeom_from_gserialized(g); /* Retrieve precision if any (default is max) */ if (PG_NARGS() >2 && !PG_ARGISNULL(2)) { precision = PG_GETARG_INT32(2); if ( precision > OUT_MAX_DOUBLE_PRECISION ) precision = OUT_MAX_DOUBLE_PRECISION; else if ( precision < 0 ) precision = 0; } /* Retrieve output option * 0 = without option (default) * 1 = bbox * 2 = short crs * 4 = long crs */ if (PG_NARGS() >3 && !PG_ARGISNULL(3)) option = PG_GETARG_INT32(3); if (option & 2 || option & 4) { /* Geography only handle srid SRID_DEFAULT */ if (option & 2) srs = getSRSbySRID(SRID_DEFAULT, true); if (option & 4) srs = getSRSbySRID(SRID_DEFAULT, false); if (!srs) { elog(ERROR, "SRID SRID_DEFAULT unknown in spatial_ref_sys table"); PG_RETURN_NULL(); } } if (option & 1) has_bbox = 1; geojson = lwgeom_to_geojson(lwgeom, srs, precision, has_bbox); lwgeom_free(lwgeom); PG_FREE_IF_COPY(g, 1); if (srs) pfree(srs); result = cstring2text(geojson); lwfree(geojson); PG_RETURN_TEXT_P(result); }