mcs/class/corlib/System.IO/LogcatTextWriter.cs

   1 #if MONODROID
   2
   3 using System;
   4 using System.IO;
   5 using System.Text;
   6 using System.Runtime.InteropServices;
   7
   8 namespace System.IO {
   9
  10         class LogcatTextWriter : TextWriter {
  11
  12                 const string LibLog = "/system/lib/liblog.so";
  13
  14                 TextWriter stdout;
  15                 readonly string appname;
  16                 StringBuilder line = new StringBuilder ();
  17
  18                 public LogcatTextWriter (string appname, TextWriter stdout)
  19                 {
  20                         this.appname = appname;
  21                         this.stdout = stdout;
  22                 }
  23
  24                 public override Encoding Encoding {
  25                         get {return Encoding.UTF8;}
  26                 }
  27
  28                 public override void Write (string s)
  29                 {
  30                         foreach (char c in s)
  31                                 Write (c);
  32                 }
  33
  34                 public override void Write (char value)
  35                 {
  36                         if (value == '\n')
  37                                 WriteLine ();
  38                         else
  39                                 line.Append (value);
  40                 }
  41
  42                 public override void WriteLine ()
  43                 {
  44                         var o = line.ToString ();
  45                         line.Clear ();
  46
  47                         Log (LogLevel.Info, appname, o);
  48                         stdout.WriteLine (o);
  49                 }
  50
  51                 enum LogLevel {
  52                         Unknown,
  53                         Default,
  54                         Verbose,
  55                         Debug,
  56                         Info,
  57                         Warn,
  58                         Error,
  59                         Fatal,
  60                         Silent
  61                 }
  62
  63                 public static bool IsRunningOnAndroid ()
  64                 {
  65                         return File.Exists (LibLog);
  66                 }
  67
  68                 [DllImport (LibLog)]
  69                 static extern void __android_log_print (LogLevel level, string appname, string format, string args, IntPtr zero);
  70
  71                 static void Log (LogLevel level, string appname, string log)
  72                 {
  73                         __android_log_print (level, appname, "%s", log, IntPtr.Zero);
  74                 }
  75         }
  76 }
  77
  78 #endif  // MONODROID