101 lines
2.1 KiB
C#
101 lines
2.1 KiB
C#
#if MONODROID
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using System;
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using System.IO;
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using System.Text;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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namespace System.IO {
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class LogcatTextWriter : TextWriter {
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const string LibLog = "/system/lib/liblog.so";
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const string LibLog64 = "/system/lib64/liblog.so";
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readonly byte[] appname;
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TextWriter stdout;
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StringBuilder line = new StringBuilder ();
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public LogcatTextWriter (string appname, TextWriter stdout)
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{
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this.appname = Encoding.UTF8.GetBytes (appname + '\0');
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this.stdout = stdout;
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}
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public override Encoding Encoding {
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get {return Encoding.UTF8;}
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}
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public override void Write (string s)
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{
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if (s != null)
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foreach (char c in s)
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Write (c);
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}
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public override void Write (char value)
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{
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if (value == '\n')
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WriteLine ();
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else
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line.Append (value);
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}
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public override void WriteLine ()
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{
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var o = line.ToString ();
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line.Clear ();
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Log (o);
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stdout.WriteLine (o);
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}
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void Log (string message)
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{
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const int buffer_size = 512;
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unsafe {
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if (Encoding.UTF8.GetByteCount (message) < buffer_size) {
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try {
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fixed (char *b_message = message) {
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byte* buffer = stackalloc byte[buffer_size];
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int written = Encoding.UTF8.GetBytes (b_message, message.Length, buffer, buffer_size - 1);
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buffer [written] = (byte)'\0';
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Log (buffer);
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}
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return;
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} catch (ArgumentException) {
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/* It might be due to a failure to encode a character, or due to a smaller than necessary buffer. In the
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* secode case, we want to fallback to simply allocating on the heap. */
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}
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}
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fixed (byte *b_message = Encoding.UTF8.GetBytes(message + '\0')) {
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Log (b_message);
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}
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}
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}
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unsafe void Log (byte* b_message)
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{
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fixed (byte *b_appname = appname) {
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Log (b_appname, 1 << 5 /* G_LOG_LEVEL_MESSAGE */, b_message);
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}
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}
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public static bool IsRunningOnAndroid ()
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{
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return File.Exists (LibLog) || File.Exists (LibLog64);
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}
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[MethodImpl(MethodImplOptions.InternalCall)]
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static unsafe extern void Log (byte *appname, int level, byte *message);
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}
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}
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#endif // MONODROID
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