fxjs/cjs_util.h

// Copyright 2014 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

#ifndef FXJS_CJS_UTIL_H_
#define FXJS_CJS_UTIL_H_

#include "core/fxcrt/span.h"
#include "core/fxcrt/widestring.h"
#include "fxjs/cjs_object.h"
#include "fxjs/js_define.h"
#include "v8/include/v8-forward.h"

class CJS_Util final : public CJS_Object {
 public:
  enum class DataType {
    kInvalid = -1,
    kInt = 0,
    kDouble = 1,
    kString = 2,
  };

  static uint32_t GetObjDefnID();
  static void DefineJSObjects(CFXJS_Engine* pEngine);

  CJS_Util(v8::Local<v8::Object> pObject, CJS_Runtime* pRuntime);
  ~CJS_Util() override;

  // Ensure that |sFormat| contains at most one well-understood printf
  // formatting directive which is safe to use with a single argument, and
  // return the type of argument expected, or -1 otherwise. If -1 is returned,
  // it is NOT safe to use |sFormat| with printf() and it must be copied
  // byte-by-byte.
  //
  // Exposed for testing.
  static DataType ParseDataType(WideString* sFormat);

  // Exposed for testing.
  static WideString StringPrintx(const WideString& cFormat,
                                 const WideString& cSource);

  JS_STATIC_METHOD(printd, CJS_Util)
  JS_STATIC_METHOD(printf, CJS_Util)
  JS_STATIC_METHOD(printx, CJS_Util)
  JS_STATIC_METHOD(scand, CJS_Util)
  JS_STATIC_METHOD(byteToChar, CJS_Util)

 private:
  static uint32_t ObjDefnID;
  static const char kName[];
  static const JSMethodSpec MethodSpecs[];

  CJS_Result printd(CJS_Runtime* pRuntime,
                    pdfium::span<v8::Local<v8::Value>> params);
  CJS_Result printf(CJS_Runtime* pRuntime,
                    pdfium::span<v8::Local<v8::Value>> params);
  CJS_Result printx(CJS_Runtime* pRuntime,
                    pdfium::span<v8::Local<v8::Value>> params);
  CJS_Result scand(CJS_Runtime* pRuntime,
                   pdfium::span<v8::Local<v8::Value>> params);
  CJS_Result byteToChar(CJS_Runtime* pRuntime,
                        pdfium::span<v8::Local<v8::Value>> params);
};

#endif  // FXJS_CJS_UTIL_H_