1 files changed, 101 insertions, 0 deletions
diff --git a/js/src/vm/JSONPrinter.h b/js/src/vm/JSONPrinter.h
new file mode 100644
index 0000000000..b90696a2b4
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+++ b/js/src/vm/JSONPrinter.h
@@ -0,0 +1,101 @@
+/* -*- 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/. */
+
+#ifndef vm_JSONPrinter_h
+#define vm_JSONPrinter_h
+
+#include "mozilla/TimeStamp.h"
+
+#include <stdio.h>
+
+#include "js/Printer.h"
+#include "js/TypeDecls.h"
+
+class JSLinearString;
+
+namespace js {
+
+class JSONPrinter {
+ protected:
+  int indentLevel_ = 0;
+  int inlineLevel_ = 0;
+  bool indent_;
+  bool first_ = true;
+  GenericPrinter& out_;
+
+  void indent();
+
+  void beforeValue();
+
+ public:
+  explicit JSONPrinter(GenericPrinter& out, bool indent = true)
+      : indent_(indent), out_(out) {}
+
+  void setIndentLevel(int indentLevel) { indentLevel_ = indentLevel; }
+
+  void beginObject();
+  void beginList();
+  void beginObjectProperty(const char* name);
+  void beginListProperty(const char* name);
+  void beginInlineListProperty(const char* name);
+
+  void value(const char* format, ...) MOZ_FORMAT_PRINTF(2, 3);
+  void value(int value);
+
+  void boolProperty(const char* name, bool value);
+
+  void property(const char* name, JSLinearString* value);
+  void property(const char* name, const char* value);
+  void property(const char* name, int32_t value);
+  void property(const char* name, uint32_t value);
+  void property(const char* name, int64_t value);
+  void property(const char* name, uint64_t value);
+#if defined(XP_DARWIN) || defined(__OpenBSD__) || defined(__wasi__)
+  // On OSX and OpenBSD, size_t is long unsigned, uint32_t is unsigned, and
+  // uint64_t is long long unsigned. Everywhere else, size_t matches either
+  // uint32_t or uint64_t.
+  void property(const char* name, size_t value);
+#endif
+
+  void formatProperty(const char* name, const char* format, ...)
+      MOZ_FORMAT_PRINTF(3, 4);
+  void formatProperty(const char* name, const char* format, va_list ap);
+
+  void propertyName(const char* name);
+
+  // JSON requires decimals to be separated by periods, but the LC_NUMERIC
+  // setting may cause printf to use commas in some locales.
+  enum TimePrecision { SECONDS, MILLISECONDS, MICROSECONDS };
+  void property(const char* name, const mozilla::TimeDuration& dur,
+                TimePrecision precision);
+
+  void floatProperty(const char* name, double value, size_t precision);
+
+  GenericPrinter& beginStringProperty(const char* name);
+  void endStringProperty();
+
+  GenericPrinter& beginString();
+  void endString();
+
+  void nullProperty(const char* name);
+  void nullValue();
+
+  void endObject();
+  void endList();
+  void endInlineList();
+
+  // Notify the output that the caller has detected OOM and should transition
+  // to its saw-OOM state.
+  void outOfMemory() { out_.reportOutOfMemory(); }
+
+ protected:
+  void beginInline();
+  void endInline();
+};
+
+}  // namespace js
+
+#endif /* vm_JSONPrinter_h */