1 files changed, 80 insertions, 0 deletions
diff --git a/js/xpconnect/src/XPCException.cpp b/js/xpconnect/src/XPCException.cpp
new file mode 100644
index 000000000..575cc4aa3
--- /dev/null
+++ b/js/xpconnect/src/XPCException.cpp
@@ -0,0 +1,80 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* vim: set ts=8 sts=4 et sw=4 tw=99: */
+/* 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/. */
+
+/* An implementaion of nsIException. */
+
+#include "xpcprivate.h"
+#include "nsError.h"
+
+/***************************************************************************/
+/* Quick and dirty mapping of well known result codes to strings. We only
+*  call this when building an exception object, so iterating the short array
+*  is not too bad.
+*
+*  It sure would be nice to have exceptions declared in idl and available
+*  in some more global way at runtime.
+*/
+
+static const struct ResultMap
+{nsresult rv; const char* name; const char* format;} map[] = {
+#define XPC_MSG_DEF(val, format) \
+    {(val), #val, format},
+#include "xpc.msg"
+#undef XPC_MSG_DEF
+    {NS_OK,0,0}   // sentinel to mark end of array
+};
+
+#define RESULT_COUNT ((sizeof(map) / sizeof(map[0]))-1)
+
+// static
+bool
+nsXPCException::NameAndFormatForNSResult(nsresult rv,
+                                         const char** name,
+                                         const char** format)
+{
+
+    for (const ResultMap* p = map; p->name; p++) {
+        if (rv == p->rv) {
+            if (name) *name = p->name;
+            if (format) *format = p->format;
+            return true;
+        }
+    }
+    return false;
+}
+
+// static
+const void*
+nsXPCException::IterateNSResults(nsresult* rv,
+                                 const char** name,
+                                 const char** format,
+                                 const void** iterp)
+{
+    const ResultMap* p = (const ResultMap*) *iterp;
+    if (!p)
+        p = map;
+    else
+        p++;
+    if (!p->name)
+        p = nullptr;
+    else {
+        if (rv)
+            *rv = p->rv;
+        if (name)
+            *name = p->name;
+        if (format)
+            *format = p->format;
+    }
+    *iterp = p;
+    return p;
+}
+
+// static
+uint32_t
+nsXPCException::GetNSResultCount()
+{
+    return RESULT_COUNT;
+}