- Update

Example/Pods/CocoaLumberjack/Lumberjack/Extensions/DDMultiFormatter.m

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+#import "DDMultiFormatter.h"
+
+/**
+ * Welcome to Cocoa Lumberjack!
+ *
+ * The project page has a wealth of documentation if you have any questions.
+ * https://github.com/CocoaLumberjack/CocoaLumberjack
+ *
+ * If you're new to the project you may wish to read the "Getting Started" page.
+ * https://github.com/CocoaLumberjack/CocoaLumberjack/wiki/GettingStarted
+ **/
+
+#if TARGET_OS_IPHONE
+// Compiling for iOS
+#if __IPHONE_OS_VERSION_MIN_REQUIRED >= 60000 // iOS 6.0 or later
+#define NEEDS_DISPATCH_RETAIN_RELEASE 0
+#else                                         // iOS 5.X or earlier
+#define NEEDS_DISPATCH_RETAIN_RELEASE 1
+#endif
+#else
+// Compiling for Mac OS X
+#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1080     // Mac OS X 10.8 or later
+#define NEEDS_DISPATCH_RETAIN_RELEASE 0
+#else                                         // Mac OS X 10.7 or earlier
+#define NEEDS_DISPATCH_RETAIN_RELEASE 1
+#endif
+#endif
+
+
+#if ! __has_feature(objc_arc)
+#error This file must be compiled with ARC. Use -fobjc-arc flag (or convert project to ARC).
+#endif
+
+
+@interface DDMultiFormatter ()
+
+- (DDLogMessage *)logMessageForLine:(NSString *)line originalMessage:(DDLogMessage *)message;
+
+@end
+
+
+@implementation DDMultiFormatter {
+    dispatch_queue_t _queue;
+    NSMutableArray *_formatters;
+}
+
+- (id)init {
+    self = [super init];
+    if (self) {
+#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
+        _queue = dispatch_queue_create("cocoa.lumberjack.multiformatter", DISPATCH_QUEUE_CONCURRENT);
+#else
+        _queue = dispatch_queue_create("cocoa.lumberjack.multiformatter", NULL);
+#endif
+        _formatters = [NSMutableArray new];
+    }
+    
+    return self;
+}
+
+#if NEEDS_DISPATCH_RETAIN_RELEASE
+- (void)dealloc {
+    dispatch_release(_queue);
+}
+#endif
+
+#pragma mark Processing
+
+- (NSString *)formatLogMessage:(DDLogMessage *)logMessage {
+    __block NSString *line = logMessage->logMsg;
+    
+    dispatch_sync(_queue, ^{
+        for (id<DDLogFormatter> formatter in _formatters) {
+            DDLogMessage *message = [self logMessageForLine:line originalMessage:logMessage];
+            line = [formatter formatLogMessage:message];
+            
+            if (!line) {
+                break;
+            }
+        }
+    });
+    
+    return line;
+}
+
+- (DDLogMessage *)logMessageForLine:(NSString *)line originalMessage:(DDLogMessage *)message {
+    DDLogMessage *newMessage = [message copy];
+    newMessage->logMsg = line;
+    return newMessage;
+}
+
+#pragma mark Formatters
+
+- (NSArray *)formatters {
+    __block NSArray *formatters;
+    
+    dispatch_sync(_queue, ^{
+        formatters = [_formatters copy];
+    });
+    
+    return formatters;
+}
+
+- (void)addFormatter:(id<DDLogFormatter>)formatter {
+    dispatch_barrier_async(_queue, ^{
+        [_formatters addObject:formatter];
+    });
+}
+
+- (void)removeFormatter:(id<DDLogFormatter>)formatter {
+    dispatch_barrier_async(_queue, ^{
+        [_formatters removeObject:formatter];
+    });
+}
+
+- (void)removeAllFormatters {
+    dispatch_barrier_async(_queue, ^{
+        [_formatters removeAllObjects];
+    });
+}
+
+- (BOOL)isFormattingWithFormatter:(id<DDLogFormatter>)formatter {
+    __block BOOL hasFormatter;
+    
+    dispatch_sync(_queue, ^{
+        hasFormatter = [_formatters containsObject:formatter];
+    });
+    
+    return hasFormatter;
+}
+
+@end