QuickJS test code.

QuickJS_Sample.cpp

#include <iostream>
#include <string>
#include <fstream>
#include <quickjs.h>


std::string readTextFile(const std::string& path)
{
  std::ifstream ifs(path);
  return std::string(std::istreambuf_iterator<char>(ifs),
                     std::istreambuf_iterator<char>());
}


int main()
{
  JSRuntime *rt = JS_NewRuntime();
  JSContext *ctx = JS_NewContext(rt);

  auto text = readTextFile("test.js");
  if (JS_IsException(JS_Eval(ctx, text.c_str(), text.size(), "<input>", JS_EVAL_FLAG_STRICT)))
  {
    JS_FreeContext(ctx);
    JS_FreeRuntime(rt);
    return -1;
  }

  JSValue global = JS_GetGlobalObject(ctx);
  JSValue func = JS_GetPropertyStr(ctx, global, "update");
  for (int i = 0; i < 3; ++i)
  {
    JSValue jsResult = JS_Call(ctx, func, global, 0, nullptr);

    int32_t result;
    JS_ToInt32(ctx, &result, jsResult);
    std::cout << result << "\n";
  }

  JSValue used[] = { func, global };
  for (int i = 0; i < std::size(used); ++i)
  {
    JS_FreeValue(ctx, used[i]);
  }

  JS_FreeContext(ctx);
  JS_FreeRuntime(rt);
}