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-rw-r--r--js/xpconnect/src/XPCException.cpp77
1 files changed, 77 insertions, 0 deletions
diff --git a/js/xpconnect/src/XPCException.cpp b/js/xpconnect/src/XPCException.cpp
new file mode 100644
index 0000000000..64a83e3b31
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+++ b/js/xpconnect/src/XPCException.cpp
@@ -0,0 +1,77 @@
+/* -*- 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/. */
+
+/* An implementaion of nsIException. */
+
+#include "xpcprivate.h"
+#include "nsError.h"
+
+#include <iterator>
+
+/***************************************************************************/
+/* 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 (std::size(map) - 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; }