AppRTCDemo file logging.

talk/examples/objc/AppRTCDemo/common/ARDLogging.h

 /*
  * libjingle
  * Copyright 2015 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
  *     this list of conditions and the following disclaimer in the documentation
  *     and/or other materials provided with the distribution.
  *  3. The name of the author may not be used to endorse or promote products
  *     derived from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #import <Foundation/Foundation.h>
 
-@class RTCSessionDescription;
+#if defined(__cplusplus)
+extern "C" void ARDLogToWebRTCLogger(NSString *logString);
+extern "C" NSString *ARDFileName(const char *filePath);
+#else
+extern void ARDLogToWebRTCLogger(NSString *logString);
+extern NSString *ARDFileName(const char *filePath);
+#endif
 
-@interface ARDSDPUtils : NSObject
+#define ARDLogString(format, ...)                                                                \
+  [NSString stringWithFormat:@"(%s %@:%d): " format, __PRETTY_FUNCTION__, ARDFileName(__FILE__), \
+                             __LINE__, ##__VA_ARGS__]
 
-// Updates the original SDP description to instead prefer the specified video
-// codec. We do this by placing the specified codec at the beginning of the
-// codec list if it exists in the sdp.
-+ (RTCSessionDescription *)
-    descriptionForDescription:(RTCSessionDescription *)description
-          preferredVideoCodec:(NSString *)codec;
+#define ARDLog(format, ...)                                    \
+  do {                                                         \
+    NSString *logString = ARDLogString(format, ##__VA_ARGS__); \
+    ARDLogToWebRTCLogger(logString);                           \
+  } while (false)
 
-@end
+#ifdef DEBUG
+#define ARDLogDebug(format, ...) ARDLog(format, ##__VA_ARGS__)
+#else
+#define ARDLogDebug(format, ...) \
+  do {                           \
+  } while (false)
+#endif