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                         if (s != null)
  31                                 foreach (char c in s)
  32                                         Write (c);
  33                 }
  34
  35                 public override void Write (char value)
  36                 {
  37                         if (value == '\n')
  38                                 WriteLine ();
  39                         else
  40                                 line.Append (value);
  41                 }
  42
  43                 public override void WriteLine ()
  44                 {
  45                         var o = line.ToString ();
  46                         line.Clear ();
  47
  48                         Log (LogLevel.Info, appname, o);
  49                         stdout.WriteLine (o);
  50                 }
  51
  52                 enum LogLevel {
  53                         Unknown,
  54                         Default,
  55                         Verbose,
  56                         Debug,
  57                         Info,
  58                         Warn,
  59                         Error,
  60                         Fatal,
  61                         Silent
  62                 }
  63
  64                 public static bool IsRunningOnAndroid ()
  65                 {
  66                         return File.Exists (LibLog);
  67                 }
  68
  69                 [DllImport (LibLog)]
  70                 static extern void __android_log_print (LogLevel level, string appname, string format, string args, IntPtr zero);
  71
  72                 static void Log (LogLevel level, string appname, string log)
  73                 {
  74                         __android_log_print (level, appname, "%s", log, IntPtr.Zero);
  75                 }
  76         }
  77 }
  78
  79 #endif  // MONODROID