dylib | include a dynamic lib | Cell 2 | Search

The code defines a function signature using the define function and uses the resulting object to call functions and verify their correctness. It includes the sum and atoi functions, which are called with test arguments and validated against expected results using the equal function.

Cell 1


// Use define function to define a function signature
const res = define({
  sum: {
      library: "libsum",
      retType: DataType.I32,
      paramsType: [DataType.I32, DataType.I32],
  },
  atoi: {
      library: "libnative",
      retType: DataType.I32,
      paramsType: [DataType.String],
  }
})
equal(res.sum([1, 2]), 3)
equal(res.atoi(["1000"]), 1000)

What the code could have been:

// Define a function signature for mathematical operations and string parsing
function defineOperations(operations) {
  /**
   * Define a function signature for mathematical operations and string parsing.
   * @param {Array} operations - An array of operation definitions.
   * @returns {Object} An object containing the defined operations.
   */
  const definedOperations = operations.reduce((acc, { name, library, returnType, params }) => {
    acc[name] = {
      library,
      returnType,
      params,
      // TODO: Cache results to improve performance
    };
    return acc;
  }, {});

  return definedOperations;
}

// Define supported data types
class DataType {
  static I32 = 'i32';
}

// Define a test suite for the operations
describe('Operations', () => {
  // Define supported operations
  const operations = [
    {
      name:'sum',
      library: 'libsum',
      returnType: DataType.I32,
      params: [DataType.I32, DataType.I32],
    },
    {
      name: 'atoi',
      library: 'libnative',
      returnType: DataType.I32,
      params: [DataType.String],
    },
  ];

  // Define the operations
  const res = defineOperations(operations);

  it('should add two integers', () => {
    // Use the sum operation
    const result = res.sum([1, 2]);
    expect(result).to.equal(3);
  });

  it('should convert a string to an integer', () => {
    // Use the atoi operation
    const result = res.atoi(['1000']);
    expect(result).to.equal(1000);
  });
});
Code Breakdown


Overview


This code defines a function signature using the define function and then uses the resulting object to call functions and verify their correctness.


Key Components


    

  • define: A function used to define a function signature. It takes an object with function names as keys and function properties as values.
    • 

  • Function Properties:

      

    • library: The library containing the function.
      • 

    • retType: The return type of the function.
      • 

    • paramsType: An array of parameter types for the function.
      • 

    • 

  • equal: A function used to compare the result of a function call with an expected value.
    • 

  • Function Calls:

      

    • res.sum([1, 2]): Calls the sum function with arguments [1, 2] and verifies that it returns 3.
      • 

    • res.atoi(["1000"]): Calls the atoi function with argument ["1000"] and verifies that it returns 1000.
      • 

    • 



Note


This code assumes that define, equal, DataType, libsum, and libnative are defined elsewhere in the codebase. The DataType enum is used to specify the data types, which in this case are I32 (32-bit integer) and String.