Initial version

2021-10-11 22:27:00 +02:00 · 2021-10-11 22:27:00 +02:00 · 6f405265a5
commit 6f405265a5
102 changed files with 14486 additions and 0 deletions
--- a/code/threads/utility.cc
+++ b/code/threads/utility.cc
@ -0,0 +1,115 @@
+// utility.cc 
+//      Debugging routines.  Allows users to control whether to 
+//      print DEBUG statements, based on a command line argument.
+//
+// Copyright (c) 1992-1993 The Regents of the University of California.
+// All rights reserved.  See copyright.h for copyright notice and limitation 
+// of liability and disclaimer of warranty provisions.
+
+#include "copyright.h"
+#include "utility.h"
+
+#include <unistd.h>
+
+// this seems to be dependent on how the compiler is configured.
+// if you have problems with va_start, try both of these alternatives
+#if defined(HOST_SNAKE) || defined(HOST_SPARC) || defined(HOST_i386) || defined(HOST_PPC) || defined(HOST_x86_64)
+#include <stdarg.h>
+#else
+#include "/usr/include/stdarg.h"
+#endif
+
+static const char *enableFlags = NULL;	// controls which DEBUG messages are printed 
+
+//----------------------------------------------------------------------
+// SetColor
+//      Set the color for subsequent printouts
+//
+//      This assumes that the TTY recognizes ANSI colors
+//----------------------------------------------------------------------
+void
+SetColor (FILE *output, enum AnsiColor color)
+{
+    if (isatty(fileno(output)))
+	fprintf(output, "\e[%dm", 30 + color);
+}
+
+//----------------------------------------------------------------------
+// SetBold
+//      Set bold attribute for subsequent printouts
+//
+//      This assumes that the TTY recognizes ANSI colors
+//----------------------------------------------------------------------
+void
+SetBold (FILE *output)
+{
+    if (isatty(fileno(output)))
+	fprintf(output, "\e[1m");
+}
+
+//----------------------------------------------------------------------
+// ClearColor
+//      Clear the color to default for subsequent printouts
+//
+//      This assumes that the TTY recognizes ANSI colors
+//----------------------------------------------------------------------
+void
+ClearColor (FILE *output)
+{
+    if (isatty(fileno(output)))
+	fprintf(output, "\e[0m");
+}
+
+//----------------------------------------------------------------------
+// DebugInit
+//      Initialize so that only DEBUG messages with a flag in flagList 
+//      will be printed.
+//
+//      If the flag is "+", we enable all DEBUG messages.
+//
+//      "flagList" is a string of characters for whose DEBUG messages are 
+//              to be enabled.
+//----------------------------------------------------------------------
+
+void
+DebugInit (const char *flagList)
+{
+    enableFlags = flagList;
+}
+
+//----------------------------------------------------------------------
+// DebugIsEnabled
+//      Return TRUE if DEBUG messages with "flag" are to be printed.
+//----------------------------------------------------------------------
+
+bool
+DebugIsEnabled (char flag)
+{
+    if (enableFlags != NULL)
+	return (strchr (enableFlags, flag) != 0)
+	    || (strchr (enableFlags, '+') != 0);
+    else
+	return FALSE;
+}
+
+//----------------------------------------------------------------------
+// DEBUG
+//      Print a debug message, if flag is enabled.  Like printf,
+//      only with an extra argument on the front.
+//----------------------------------------------------------------------
+
+void
+DEBUG (char flag, const char *format, ...)
+{
+    if (DebugIsEnabled (flag))
+      {
+	  va_list ap;
+	  // You will get an unused variable message here -- ignore it.
+	  va_start (ap, format);
+	  SetColor(stdout, ColorMagenta);
+	  vfprintf (stdout, format, ap);
+	  ClearColor(stdout);
+	  va_end (ap);
+	  fflush (stdout);
+      }
+}