1 files changed, 83 insertions, 0 deletions
diff --git a/js/xpconnect/src/XPCLog.cpp b/js/xpconnect/src/XPCLog.cpp
new file mode 100644
index 0000000000..834ea2bc3c
--- /dev/null
+++ b/js/xpconnect/src/XPCLog.cpp
@@ -0,0 +1,83 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* Debug Logging support. */
+
+#include "XPCLog.h"
+#include "mozilla/Logging.h"
+#include "mozilla/Sprintf.h"
+#include "mozilla/mozalloc.h"
+#include <string.h>
+#include <stdarg.h>
+
+// this all only works for DEBUG...
+#ifdef DEBUG
+
+#  define SPACE_COUNT 200
+#  define LINE_LEN 200
+#  define INDENT_FACTOR 2
+
+#  define CAN_RUN (g_InitState == 1 || (g_InitState == 0 && Init()))
+
+static char* g_Spaces;
+static int g_InitState = 0;
+static int g_Indent = 0;
+static mozilla::LazyLogModule g_LogMod("xpclog");
+
+static bool Init() {
+  g_Spaces = new char[SPACE_COUNT + 1];
+  if (!g_Spaces || !MOZ_LOG_TEST(g_LogMod, LogLevel::Error)) {
+    g_InitState = 1;
+    XPC_Log_Finish();
+    return false;
+  }
+  memset(g_Spaces, ' ', SPACE_COUNT);
+  g_Spaces[SPACE_COUNT] = 0;
+  g_InitState = 1;
+  return true;
+}
+
+void XPC_Log_Finish() {
+  if (g_InitState == 1) {
+    delete[] g_Spaces;
+  }
+  g_InitState = -1;
+}
+
+void XPC_Log_print(const char* fmt, ...) {
+  va_list ap;
+  char line[LINE_LEN];
+
+  va_start(ap, fmt);
+  VsprintfLiteral(line, fmt, ap);
+  va_end(ap);
+  if (g_Indent) {
+    PR_LogPrint("%s%s", g_Spaces + SPACE_COUNT - (INDENT_FACTOR * g_Indent),
+                line);
+  } else {
+    PR_LogPrint("%s", line);
+  }
+}
+
+bool XPC_Log_Check(int i) {
+  return CAN_RUN && MOZ_LOG_TEST(g_LogMod, LogLevel::Error);
+}
+
+void XPC_Log_Indent() {
+  if (INDENT_FACTOR * (++g_Indent) > SPACE_COUNT) {
+    g_Indent--;
+  }
+}
+
+void XPC_Log_Outdent() {
+  if (--g_Indent < 0) {
+    g_Indent++;
+  }
+}
+
+void XPC_Log_Clear_Indent() { g_Indent = 0; }
+
+#endif