// // SPMySQLGeometryData.m // sequel-pro // // Created by Hans-Jörg Bibiko on October 07, 2010 // // Permission is hereby granted, free of charge, to any person // obtaining a copy of this software and associated documentation // files (the "Software"), to deal in the Software without // restriction, including without limitation the rights to use, // copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following // conditions: // // The above copyright notice and this permission notice shall be // included in all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES // OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, // WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR // OTHER DEALINGS IN THE SOFTWARE. // // More info at #import "SPMySQLGeometryData.h" enum wkbType { wkb_point = 1, wkb_linestring = 2, wkb_polygon = 3, wkb_multipoint = 4, wkb_multilinestring = 5, wkb_multipolygon = 6, wkb_geometrycollection = 7 }; typedef struct st_point_2d_ { double x; double y; } st_point_2d; #define SIZEOF_STORED_UINT32 4 #define SIZEOF_STORED_DOUBLE 8 #define POINT_DATA_SIZE (SIZEOF_STORED_DOUBLE*2) #define WKB_HEADER_SIZE (1+SIZEOF_STORED_UINT32) #define BUFFER_START 0 @implementation SPMySQLGeometryData /** * Initialize the SPMySQLGeometryData object */ - (id)init { if ((self = [super init])) { geoBuffer = nil; bufferLength = 0; } return self; } /** * Initialize the SPMySQLGeometryData object with the WKB data */ - (id)initWithBytes:(const void *)geoData length:(NSUInteger)length { if ((self = [self init])) { bufferLength = length; geoBuffer = malloc(bufferLength); memcpy(geoBuffer, geoData, bufferLength); } return self; } /** * Return an autorelease SPMySQLGeometryData object */ + (id)dataWithBytes:(const void *)geoData length:(NSUInteger)length { return [[[SPMySQLGeometryData alloc] initWithBytes:geoData length:length] autorelease]; } /** * copyWithZone */ - (id)copyWithZone:(NSZone *)zone { return [self retain]; } /** * Return the hex representation of the WKB buffer (only for convenience) */ - (NSString*)description { return [[NSData dataWithBytes:geoBuffer length:bufferLength] description]; } /** * Return the length of the WKB buffer */ - (NSUInteger)length { return bufferLength; } /** * Return NSData pointer of the WKB buffer */ - (NSData *)data { return [NSData dataWithBytes:geoBuffer length:bufferLength]; } /** * Return a human readable WKT string of the internal format (imitating the SQL function AsText()). */ - (NSString *)wktString { char byteOrder; uint32_t geoType, numberOfItems, numberOfSubItems, numberOfSubSubItems, numberOfCollectionItems; int32_t srid; st_point_2d aPoint; uint32_t i, j, k, n; // Loop counter for numberOf...Items uint32_t ptr = BUFFER_START; // pointer to geoBuffer while parsing NSMutableString *wkt = [NSMutableString string]; if (bufferLength < WKB_HEADER_SIZE) return @""; memcpy(&srid, &geoBuffer[0], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; byteOrder = (char)geoBuffer[ptr]; if (byteOrder != 0x1) return @"Byte order not yet supported"; ptr++; geoType = geoBuffer[ptr]; ptr += SIZEOF_STORED_UINT32; switch (geoType) { case wkb_point: memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); return [NSString stringWithFormat:@"POINT(%.16g %.16g)%@", aPoint.x, aPoint.y, (srid) ? [NSString stringWithFormat:@",%d",srid]: @""]; break; case wkb_linestring: [wkt setString:@"LINESTRING("]; memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; for (i=0; i < numberOfItems; i++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); [wkt appendFormat:@"%.16g %.16g%@", aPoint.x, aPoint.y, (i < numberOfItems-1) ? @"," : @""]; ptr += POINT_DATA_SIZE; } [wkt appendFormat:@")%@", (srid) ? [NSString stringWithFormat:@",%d",srid]: @""]; return wkt; break; case wkb_polygon: [wkt setString:@"POLYGON("]; memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; for (i=0; i < numberOfItems; i++) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-29 18:02:25 +0000
x, aPoint.y, (j < numberOfSubItems-1) ? @"," : @""]; ptr += POINT_DATA_SIZE; } [wkt appendFormat:@")%@", (i < numberOfItems-1) ? @"," : @""]; } [wkt appendFormat:@")%@", (srid) ? [NSString stringWithFormat:@",%d",srid]: @""]; return wkt; break; case wkb_multipoint: [wkt setString:@"MULTIPOINT("]; memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32+WKB_HEADER_SIZE; for (i=0; i < numberOfItems; i++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); [wkt appendFormat:@"%.16g %.16g%@", aPoint.x, aPoint.y, (i < numberOfItems-1) ? @"," : @""]; ptr += POINT_DATA_SIZE+WKB_HEADER_SIZE; } [wkt appendFormat:@")%@", (srid) ? [NSString stringWithFormat:@",%d",srid]: @""]; return wkt; break; case wkb_multilinestring: [wkt setString:@"MULTILINESTRING("]; memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32+WKB_HEADER_SIZE; for (i=0; i < numberOfItems; i++) { memcpy(&numberOfSubItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; [wkt appendString:@"("]; for (j=0; j < numberOfSubItems; j++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); [wkt appendFormat:@"%.16g %.16g%@", aPoint.x, aPoint.y, (j < numberOfSubItems-1) ? @"," : @""]; ptr += POINT_DATA_SIZE; } ptr += WKB_HEADER_SIZE; [wkt appendFormat:@")%@", (i < numberOfItems-1) ? @"," : @""]; } [wkt appendFormat:@")%@", (srid) ? [NSString stringWithFormat:@",%d",srid]: @""]; return wkt; break; case wkb_multipolygon: [wkt setString:@"MULTIPOLYGON("]; memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32+WKB_HEADER_SIZE; for (i=0; i < numberOfItems; i++) { memcpy(&numberOfSubItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; [wkt appendString:@"("]; for (j=0; j < numberOfSubItems; j++) { memcpy(&numberOfSubSubItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; [wkt appendString:@"("]; for (k=0; k < numberOfSubSubItems; k++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); [wkt appendFormat:@"%.16g %.16g%@", aPoint.x, aPoint.y, (k < numberOfSubSubItems-1) ? @"," : @""]; ptr += POINT_DATA_SIZE; } [wkt appendFormat:@")%@", (j < numberOfSubItems-1) ? @"," : @""]; } ptr += WKB_HEADER_SIZE; [wkt appendFormat:@")%@", (i < numberOfItems-1) ? @"," : @""]; } [wkt appendFormat:@")%@", (srid) ? [NSString stringWithFormat:@",%d",srid]: @""]; return wkt; break; case wkb_geometrycollection: [wkt setString:@"GEOMETRYCOLLECTION("]; numberOfCollectionItems = geoBuffer[ptr]; ptr += SIZEOF_STORED_UINT32; for (n=0; n < numberOfCollectionItems; n++) { byteOrder = (char)geoBuffer[ptr]; if(byteOrder != 0x1) return @"Byte order not yet supported"; ptr++; geoType = geoBuffer[ptr]; ptr += SIZEOF_STORED_UINT32; switch(geoType) { case wkb_point: memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); [wkt appendFormat:@"POINT(%.16g %.16g)", aPoint.x, aPoint.y]; ptr += POINT_DATA_SIZE; break; case wkb_linestring: [wkt appendString:@"LINESTRING("]; memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; for (i=0; i < numberOfItems; i++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); [wkt appendFormat:@"%.16g %.16g%@", aPoint.x, aPoint.y, (i < numberOfItems-1) ? @"," : @""]; ptr += POINT_DATA_SIZE; } [wkt appendString:@")"]; break; case wkb_polygon: [wkt appendString:@"POLYGON("]; memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; for (i=0; i < numberOfItems; i++) { memcpy(&numberOfSubItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; [wkt appendString:@"("]; for (j=0; j < numberOfSubItems; j++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); [wkt appendFormat:@"%.16g %.16g%@", aPoint.x, aPoint.y, (j < numberOfSubItems-1) ? @"," : @""]; ptr += POINT_DATA_SIZE; } [wkt appendFormat:@")%@", (i < numberOfItems-1) ? @"," : @""]; } [wkt appendString:@")"]; break; case wkb_multipoint: [wkt appendString:@"MULTIPOINT("]; memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32+WKB_HEADER_SIZE; for (i=0; i < numberOfItems; i++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); [wkt appendFormat:@"%.16g %.16g%@", aPoint.x, aPoint.y, (i < numberOfItems-1) ? @"," : @""]; ptr += POINT_DATA_SIZE+WKB_HEADER_SIZE; } ptr -= WKB_HEADER_SIZE; [wkt appendString:@")"]; break; case wkb_multilinestring: [wkt appendString:@"MULTILINESTRING("]; memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32+WKB_HEADER_SIZE; for (i=0; i < numberOfItems; i++) { memcpy(&numberOfSubItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; [wkt appendString:@"("]; for (j=0; j < numberOfSubItems; j++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); [wkt appendFormat:@"%.16g %.16g%@", aPoint.x, aPoint.y, (j < numberOfSubItems-1) ? @"," : @""]; ptr += POINT_DATA_SIZE; } ptr += WKB_HEADER_SIZE; [wkt appendFormat:@")%@", (i < numberOfItems-1) ? @"," : @""]; } ptr -= WKB_HEADER_SIZE; [wkt appendString:@")"]; break; case wkb_multipolygon: [wkt appendString:@"MULTIPOLYGON("]; memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32+WKB_HEADER_SIZE; for (i=0; i < numberOfItems; i++) { memcpy(&numberOfSubItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; [wkt appendString:@"("]; for (j=0; j < numberOfSubItems; j++) { memcpy(&numberOfSubSubItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; [wkt appendString:@"("]; for (k=0; k < numberOfSubSubItems; k++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); [wkt appendFormat:@"%.16g %.16g%@", aPoint.x, aPoint.y, (k < numberOfSubSubItems-1) ? @"," : @""]; ptr += POINT_DATA_SIZE; } [wkt appendFormat:@")%@", (j < numberOfSubItems-1) ? @"," : @""]; } ptr += WKB_HEADER_SIZE; [wkt appendFormat:@")%@", (i < numberOfItems-1) ? @"," : @""]; } ptr -= WKB_HEADER_SIZE; [wkt appendString:@")"]; break; default: return @"Error geometrycollection type parsing"; } [wkt appendString:(n < numberOfCollectionItems-1) ? @"," : @""]; } [wkt appendFormat:@")%@", (srid) ? [NSString stringWithFormat:@",%d",srid]: @""]; return wkt; break; default: return @"Error geometry type parsing"; } return @"Error while parsing"; } /** * Return a dictionary of coordinates, bbox, etc. to be able to draw the given geometry. * * @return A dictionary having the following keys: "bbox" as NSArray of NSNumbers of x_min x_max y_min y_max, "coordinates" as NSArray containing the * the to be drawn points as NSPoint strings, "type" as NSString */ - (NSDictionary *)coordinates { char byteOrder; uint32_t geoType, numberOfItems, numberOfSubItems, numberOfSubSubItems, numberOfCollectionItems; int32_t srid; st_point_2d aPoint; uint32_t i, j, k, n; // Loop counter for numberOf...Items uint32_t ptr = BUFFER_START; // pointer to geoBuffer while parsing double x_min = DBL_MAX; double x_max = -DBL_MAX; double y_min = DBL_MAX; double y_max = -DBL_MAX; NSMutableArray *coordinates = [NSMutableArray array]; NSMutableArray *subcoordinates = [NSMutableArray array]; NSMutableArray *pointcoordinates = [NSMutableArray array]; NSMutableArray *linecoordinates = [NSMutableArray array]; NSMutableArray *linesubcoordinates = [NSMutableArray array]; NSMutableArray *polygoncoordinates = [NSMutableArray array]; NSMutableArray *polygonsubcoordinates = [NSMutableArray array]; if (bufferLength < WKB_HEADER_SIZE) return nil; memcpy(&srid, &geoBuffer[0], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; byteOrder = (char)geoBuffer[ptr]; if (byteOrder != 0x1) return nil; ptr++; geoType = geoBuffer[ptr]; ptr += SIZEOF_STORED_UINT32; switch(geoType) { case wkb_point: memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); x_min = aPoint.x; x_max = aPoint.x; y_min = aPoint.y; y_max = aPoint.y; [coordinates addObject:NSStringFromPoint(NSMakePoint((CGFloat)aPoint.x, (CGFloat)aPoint.y))]; return [NSDictionary dictionaryWithObjectsAndKeys: [NSArray arrayWithObjects: [NSNumber numberWithDouble:x_min], [NSNumber numberWithDouble:x_max], [NSNumber numberWithDouble:y_min], [NSNumber numberWithDouble:y_max], nil], @"bbox", coordinates, @"coordinates", [NSNumber numberWithInt:srid], @"srid", @"POINT", @"type", nil]; break; case wkb_linestring: memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; for (i=0; i < numberOfItems; i++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); x_min = (aPoint.x < x_min) ? aPoint.x : x_min; x_max = (aPoint.x > x_max) ? aPoint.x : x_max; y_min = (aPoint.y < y_min) ? aPoint.y : y_min; y_max = (aPoint.y > y_max) ? aPoint.y : y_max; [coordinates addObject:NSStringFromPoint(NSMakePoint((CGFloat)aPoint.x, (CGFloat)aPoint.y))]; ptr += POINT_DATA_SIZE; } return [NSDictionary dictionaryWithObjectsAndKeys: [NSArray arrayWithObjects: [NSNumber numberWithDouble:x_min], [NSNumber numberWithDouble:x_max], [NSNumber numberWithDouble:y_min], [NSNumber numberWithDouble:y_max], nil], @"bbox", [NSArray arrayWithObjects:coordinates,nil], @"coordinates", @"LINESTRING", @"type", nil]; break; case wkb_polygon: memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; for (i=0; i < numberOfItems; i++) { memcpy(&numberOfSubItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; for (j=0; j < numberOfSubItems; j++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); x_min = (aPoint.x < x_min) ? aPoint.x : x_min; x_max = (aPoint.x > x_max) ? aPoint.x : x_max; y_min = (aPoint.y < y_min) ? aPoint.y : y_min; y_max = (aPoint.y > y_max) ? aPoint.y : y_max; [subcoordinates addObject:NSStringFromPoint(NSMakePoint((CGFloat)aPoint.x, (CGFloat)aPoint.y))]; ptr += POINT_DATA_SIZE; } [coordinates addObject:[[subcoordinates copy] autorelease]]; [subcoordinates removeAllObjects]; } return [NSDictionary dictionaryWithObjectsAndKeys: [NSArray arrayWithObjects: [NSNumber numberWithDouble:x_min], [NSNumber numberWithDouble:x_max], [NSNumber numberWithDouble:y_min], [NSNumber numberWithDouble:y_max], nil], @"bbox", coordinates, @"coordinates", [NSNumber numberWithInt:srid], @"srid", @"POLYGON", @"type", nil]; break; case wkb_multipoint: memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32+WKB_HEADER_SIZE; for (i=0; i < numberOfItems; i++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); x_min = (aPoint.x < x_min) ? aPoint.x : x_min; x_max = (aPoint.x > x_max) ? aPoint.x : x_max; y_min = (aPoint.y < y_min) ? aPoint.y : y_min; y_max = (aPoint.y > y_max) ? aPoint.y : y_max; [coordinates addObject:NSStringFromPoint(NSMakePoint((CGFloat)aPoint.x, (CGFloat)aPoint.y))]; ptr += POINT_DATA_SIZE+WKB_HEADER_SIZE; } return [NSDictionary dictionaryWithObjectsAndKeys: [NSArray arrayWithObjects: [NSNumber numberWithDouble:x_min], [NSNumber numberWithDouble:x_max], [NSNumber numberWithDouble:y_min], [NSNumber numberWithDouble:y_max], nil], @"bbox", coordinates, @"coordinates", [NSNumber numberWithInt:srid], @"srid", @"MULTIPOINT", @"type", nil]; break; case wkb_multilinestring: memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32+WKB_HEADER_SIZE; for (i=0; i < numberOfItems; i++) { memcpy(&numberOfSubItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; for (j=0; j < numberOfSubItems; j++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); x_min = (aPoint.x < x_min) ? aPoint.x : x_min; x_max = (aPoint.x > x_max) ? aPoint.x : x_max; y_min = (aPoint.y < y_min) ? aPoint.y : y_min; y_max = (aPoint.y > y_max) ? aPoint.y : y_max; [subcoordinates addObject:NSStringFromPoint(NSMakePoint((CGFloat)aPoint.x, (CGFloat)aPoint.y))]; ptr += POINT_DATA_SIZE; } ptr += WKB_HEADER_SIZE; [coordinates addObject:[[subcoordinates copy] autorelease]]; [subcoordinates removeAllObjects]; } return [NSDictionary dictionaryWithObjectsAndKeys: [NSArray arrayWithObjects: [NSNumber numberWithDouble:x_min], [NSNumber numberWithDouble:x_max], [NSNumber numberWithDouble:y_min], [NSNumber numberWithDouble:y_max], nil], @"bbox", coordinates, @"coordinates", [NSNumber numberWithInt:srid], @"srid", @"MULTILINESTRING", @"type", nil]; break; case wkb_multipolygon: memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32+WKB_HEADER_SIZE; for (i=0; i < numberOfItems; i++) { memcpy(&numberOfSubItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; for (j=0; j < numberOfSubItems; j++) { memcpy(&numberOfSubSubItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; for (k=0; k < numberOfSubSubItems; k++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); x_min = (aPoint.x < x_min) ? aPoint.x : x_min; x_max = (aPoint.x > x_max) ? aPoint.x : x_max; y_min = (aPoint.y < y_min) ? aPoint.y : y_min; y_max = (aPoint.y > y_max) ? aPoint.y : y_max; [subcoordinates addObject:NSStringFromPoint(NSMakePoint((CGFloat)aPoint.x, (CGFloat)aPoint.y))]; ptr += POINT_DATA_SIZE; } [coordinates addObject:[[subcoordinates copy] autorelease]]; [subcoordinates removeAllObjects]; } ptr += WKB_HEADER_SIZE; } return [NSDictionary dictionaryWithObjectsAndKeys: [NSArray arrayWithObjects: [NSNumber numberWithDouble:x_min], [NSNumber numberWithDouble:x_max], [NSNumber numberWithDouble:y_min], [NSNumber numberWithDouble:y_max], nil], @"bbox", coordinates, @"coordinates", [NSNumber numberWithInt:srid], @"srid", @"MULTIPOLYGON", @"type", nil]; break; case wkb_geometrycollection: numberOfCollectionItems = geoBuffer[ptr]; ptr += SIZEOF_STORED_UINT32; for (n=0; n < numberOfCollectionItems; n++) { byteOrder = (char)geoBuffer[ptr]; if (byteOrder != 0x1) return nil; ptr++; geoType = geoBuffer[ptr]; ptr += SIZEOF_STORED_UINT32; switch(geoType) { case wkb_point: memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); x_min = (aPoint.x < x_min) ? aPoint.x : x_min; x_max = (aPoint.x > x_max) ? aPoint.x : x_max; y_min = (aPoint.y < y_min) ? aPoint.y : y_min; y_max = (aPoint.y > y_max) ? aPoint.y : y_max; [pointcoordinates addObject:NSStringFromPoint(NSMakePoint((CGFloat)aPoint.x, (CGFloat)aPoint.y))]; ptr += POINT_DATA_SIZE; break; case wkb_linestring: memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; for (i=0; i < numberOfItems; i++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); x_min = (aPoint.x < x_min) ? aPoint.x : x_min; x_max = (aPoint.x > x_max) ? aPoint.x : x_max; y_min = (aPoint.y < y_min) ? aPoint.y : y_min; y_max = (aPoint.y > y_max) ? aPoint.y : y_max; [linesubcoordinates addObject:NSStringFromPoint(NSMakePoint((CGFloat)aPoint.x, (CGFloat)aPoint.y))]; ptr += POINT_DATA_SIZE; } [linecoordinates addObject:[[linesubcoordinates copy] autorelease]]; [linesubcoordinates removeAllObjects]; break; case wkb_polygon: memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; for (i=0; i < numberOfItems; i++) { memcpy(&numberOfSubItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; for (j=0; j < numberOfSubItems; j++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); x_min = (aPoint.x < x_min) ? aPoint.x : x_min; x_max = (aPoint.x > x_max) ? aPoint.x : x_max; y_min = (aPoint.y < y_min) ? aPoint.y : y_min; y_max = (aPoint.y > y_max) ? aPoint.y : y_max; [polygonsubcoordinates addObject:NSStringFromPoint(NSMakePoint((CGFloat)aPoint.x, (CGFloat)aPoint.y))]; ptr += POINT_DATA_SIZE; } [polygoncoordinates addObject:[[polygonsubcoordinates copy] autorelease]]; [polygonsubcoordinates removeAllObjects]; } break; case wkb_multipoint: memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32+WKB_HEADER_SIZE; for (i=0; i < numberOfItems; i++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); x_min = (aPoint.x < x_min) ? aPoint.x : x_min; x_max = (aPoint.x > x_max) ? aPoint.x : x_max; y_min = (aPoint.y < y_min) ? aPoint.y : y_min; y_max = (aPoint.y > y_max) ? aPoint.y : y_max; [pointcoordinates addObject:NSStringFromPoint(NSMakePoint((CGFloat)aPoint.x, (CGFloat)aPoint.y))]; ptr += POINT_DATA_SIZE+WKB_HEADER_SIZE; } ptr -= WKB_HEADER_SIZE; break; case wkb_multilinestring: memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32+WKB_HEADER_SIZE; for (i=0; i < numberOfItems; i++) { memcpy(&numberOfSubItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; for (j=0; j < numberOfSubItems; j++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); x_min = (aPoint.x < x_min) ? aPoint.x : x_min; x_max = (aPoint.x > x_max) ? aPoint.x : x_max; y_min = (aPoint.y < y_min) ? aPoint.y : y_min; y_max = (aPoint.y > y_max) ? aPoint.y : y_max; [linesubcoordinates addObject:NSStringFromPoint(NSMakePoint((CGFloat)aPoint.x, (CGFloat)aPoint.y))]; ptr += POINT_DATA_SIZE; } [linecoordinates addObject:[[linesubcoordinates copy] autorelease]]; [linesubcoordinates removeAllObjects]; ptr += WKB_HEADER_SIZE; } ptr -= WKB_HEADER_SIZE; break; case wkb_multipolygon: memcpy(&numberOfItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32+WKB_HEADER_SIZE; for (i=0; i < numberOfItems; i++) { memcpy(&numberOfSubItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; for (j=0; j < numberOfSubItems; j++) { memcpy(&numberOfSubSubItems, &geoBuffer[ptr], SIZEOF_STORED_UINT32); ptr += SIZEOF_STORED_UINT32; for (k=0; k < numberOfSubSubItems; k++) { memcpy(&aPoint, &geoBuffer[ptr], POINT_DATA_SIZE); x_min = (aPoint.x < x_min) ? aPoint.x : x_min; x_max = (aPoint.x > x_max) ? aPoint.x : x_max; y_min = (aPoint.y < y_min) ? aPoint.y : y_min; y_max = (aPoint.y > y_max) ? aPoint.y : y_max; [polygonsubcoordinates addObject:NSStringFromPoint(NSMakePoint((CGFloat)aPoint.x, (CGFloat)aPoint.y))]; ptr += POINT_DATA_SIZE; } [polygoncoordinates addObject:[[polygonsubcoordinates copy] autorelease]]; [polygonsubcoordinates removeAllObjects]; } ptr += WKB_HEADER_SIZE; } ptr -= WKB_HEADER_SIZE; break; default: return nil; } } return [NSDictionary dictionaryWithObjectsAndKeys: [NSArray arrayWithObjects: [NSNumber numberWithDouble:x_min], [NSNumber numberWithDouble:x_max], [NSNumber numberWithDouble:y_min], [NSNumber numberWithDouble:y_max], nil], @"bbox", [NSArray arrayWithObjects:pointcoordinates, linecoordinates, polygoncoordinates, nil], @"coordinates", @"GEOMETRYCOLLECTION", @"type", nil]; break; default: return nil; } return nil; } /** * Return the WKB type of the geoBuffer ie if buffer represents a POINT, LINESTRING, etc. * according to stored wkbType in header file. It returns -1 if an error occurred. */ - (NSInteger)wkbType { char byteOrder; SInt32 geoType; NSUInteger ptr = BUFFER_START; // pointer to geoBuffer while parsing if (bufferLength < WKB_HEADER_SIZE) return -1; byteOrder = (char)geoBuffer[ptr]; if (byteOrder != 0x1) return -1; ptr++; geoType = geoBuffer[ptr]; if (geoType > 0 && geoType < 8) return geoType; else return -1; } /** * Return the WKT type of the geoBuffer ie if buffer represents a POINT, LINESTRING, etc. * according to stored wkbType in header file. It returns nil if an error occurred. */ - (NSString *)wktType { switch ([self wkbType]) { case wkb_point: return @"POINT"; case wkb_linestring: return @"LINESTRING"; case wkb_polygon: return @"POLYGON"; case wkb_multipoint: return @"MULTIPOINT"; case wkb_multilinestring: return @"MULTILINESTRING"; case wkb_multipolygon: return @"MULTIPOLYGON"; case wkb_geometrycollection: return @"GEOMETRYCOLLECTION"; default: return nil; } return nil; } /** * dealloc */ - (void)dealloc { if (geoBuffer && bufferLength) free(geoBuffer); [super dealloc]; } @end