1 files changed, 53 insertions, 0 deletions
diff --git a/js/src/util/Printf.cpp b/js/src/util/Printf.cpp
new file mode 100644
index 0000000000..e1ab853af0
--- /dev/null
+++ b/js/src/util/Printf.cpp
@@ -0,0 +1,53 @@
+/* -*- 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/. */
+
+/*
+ * Portable safe sprintf code.
+ *
+ * Author: Kipp E.B. Hickman
+ */
+
+#include "js/Printf.h"
+
+#include "mozilla/Printf.h"
+
+#include "js/AllocPolicy.h"
+
+using namespace js;
+
+using JSSmprintfPointer = mozilla::SmprintfPolicyPointer<js::SystemAllocPolicy>;
+
+JS_PUBLIC_API JS::UniqueChars JS_smprintf(const char* fmt, ...) {
+  va_list ap;
+  va_start(ap, fmt);
+  JSSmprintfPointer result = mozilla::Vsmprintf<js::SystemAllocPolicy>(fmt, ap);
+  va_end(ap);
+  return JS::UniqueChars(result.release());
+}
+
+JS_PUBLIC_API JS::UniqueChars JS_sprintf_append(JS::UniqueChars&& last,
+                                                const char* fmt, ...) {
+  va_list ap;
+  va_start(ap, fmt);
+  JSSmprintfPointer lastPtr(last.release());
+  JSSmprintfPointer result = mozilla::VsmprintfAppend<js::SystemAllocPolicy>(
+      std::move(lastPtr), fmt, ap);
+  va_end(ap);
+  return JS::UniqueChars(result.release());
+}
+
+JS_PUBLIC_API JS::UniqueChars JS_vsmprintf(const char* fmt, va_list ap) {
+  return JS::UniqueChars(
+      mozilla::Vsmprintf<js::SystemAllocPolicy>(fmt, ap).release());
+}
+
+JS_PUBLIC_API JS::UniqueChars JS_vsprintf_append(JS::UniqueChars&& last,
+                                                 const char* fmt, va_list ap) {
+  JSSmprintfPointer lastPtr(last.release());
+  return JS::UniqueChars(mozilla::VsmprintfAppend<js::SystemAllocPolicy>(
+                             std::move(lastPtr), fmt, ap)
+                             .release());
+}