--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/misc/debug.h	Wed Jan 16 22:39:43 2008 +0100
@@ -0,0 +1,94 @@
+// Copyright (C) 1999,2000 Bruce Guenter <bruceg@em.ca>
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+#ifndef VMAILMGR__DEBUG__H__
+#define VMAILMGR__DEBUG__H__
+
+#define trace(X) trace2(this,X)
+#define traceptr(X,P) trace3(this,X " " #P "=",P)
+#define tracestr(X,P) trace4(this,X " " #P "=(",P)
+
+#ifdef TRACE
+
+#include <unistd.h>
+
+static inline const char* itoh(unsigned i)
+{
+  static char convert[17] = "0123456789abcdef";
+  static char buf[9];
+  for(unsigned j = 8; j > 0; ) {
+    --j;
+    buf[j] = convert[i & 0xf];
+    i >>= 4;
+  }
+  buf[8] = 0;
+  return buf;
+}
+
+static inline void trace2(const void* s, const char* x)
+{
+  write(2, itoh((unsigned)s), 8);
+  write(2, ": ", 2);
+  write(2, x, strlen(x));
+  write(2, "\n", 1);
+}
+
+static inline void trace3(const void* s, const char* x, const void* p)
+{
+  write(2, itoh((unsigned)s), 8);
+  write(2, ": ", 2);
+  write(2, x, strlen(x));
+  write(2, itoh((unsigned)p), 8);
+  write(2, "\n", 1);
+}
+
+static inline void trace4(const void* s, const char* x, const char* p)
+{
+  write(2, itoh((unsigned)s), 8);
+  write(2, ": ", 2);
+  write(2, x, strlen(x));
+  write(2, itoh((unsigned)p), 8);
+  write(2, ")'", 2);
+  write(2, p, strlen(p));
+  write(2, "'\n", 2);
+}
+
+#else
+#define trace2(X,P)
+#define trace3(T,X,P)
+#define trace4(T,X,P)
+#endif
+
+#ifdef DEBUG
+
+static inline void debug(const char* x)
+{
+  write(2, x, strlen(x));
+  write(2, "\n", 1);
+}
+
+static inline void fail(int code, const char* message)
+{
+  debug(message);
+  exit(code);
+}
+
+#else
+#define fail(X,Y) exit(X)
+#define debug(X)
+#endif
+
+#endif