Add a binary data handler.

1 files changed, 103 insertions, 0 deletions

diff --git a/Frameworks/PostgresKit/Source/PGPostgresTypeBinaryHandler.m b/Frameworks/PostgresKit/Source/PGPostgresTypeBinaryHandler.m
new file mode 100644
index 00000000..f544fb39
--- /dev/null
+++ b/Frameworks/PostgresKit/Source/PGPostgresTypeBinaryHandler.m
@@ -0,0 +1,103 @@
+//
+//  $Id$
+//
+//  PGPostgresTypeBinaryHandler.m
+//  PostgresKit
+//
+//  Created by Stuart Connolly (stuconnolly.com) on September 28, 2012.
+//  Copyright (c) 2012 Stuart Connolly. All rights reserved.
+//
+//  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.
+
+#import "PGPostgresTypeBinaryHandler.h"
+
+static PGPostgresOid PGPostgresTypeBinaryTypes[] = 
+{ 
+	PGPostgresOidByteData,
+	0 
+};
+
+@interface PGPostgresTypeBinaryHandler ()
+
+- (id)_binaryDataFromResult;
+
+@end
+
+
+@implementation PGPostgresTypeBinaryHandler
+
+@synthesize row = _row;
+@synthesize type = _type;
+@synthesize column = _column;
+@synthesize result = _result;
+
+#pragma mark -
+#pragma mark Protocol Implementation
+
+- (PGPostgresOid *)remoteTypes 
+{
+	return PGPostgresTypeBinaryTypes;
+}
+
+- (Class)nativeClass 
+{
+	return [NSString class];
+}
+
+- (NSArray *)classAliases
+{
+	return nil;
+}
+
+- (id)objectFromResult
+{	
+	if (!_result || !_type) return [NSNull null];
+	
+	switch (_type)
+	{
+		case PGPostgresOidByteData:
+			return [self _binaryDataFromResult];
+	}
+	
+	return [NSNull null];
+}
+
+#pragma mark -
+#pragma mark Private API
+
+/**
+ * Converts a binary data value to an NSData instance.
+ *
+ * @return The NSData representation of the data.
+ */
+- (id)_binaryDataFromResult
+{
+	PGbytea data;
+	
+	if (!PQgetf(_result, _row, PGPostgresResultValueByteA, _column)) return [NSNull null];
+	
+	if (!data.data || !data.len) return [NSNull null];
+	
+	return [NSData dataWithBytes:data.data length:data.len];
+}
+
+@end