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_02_primitives.dart
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_02_primitives.dart
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import 'package:ffi/ffi.dart';
import 'package:connect_dart_with_others/color_printer.dart';
import 'package:connect_dart_with_others/lib_builder.dart';
import 'dart:ffi';
void main() async {
final math = await MathFunctions.loadFunctions();
printGreen('Output:');
final sumResult = math.sum(1, 2);
print('sum(1, 2) return $sumResult');
final argPointer = calloc<Int32>()..value = 10;
final substractResult = math.substract(argPointer, 3);
print('substract(10, 3) return $substractResult');
calloc.free(argPointer);
final multiResult = math.myltiply(3, 3);
print('multiply(3, 3) return ${multiResult.value}');
calloc.free(multiResult);
final resultMultiSum = math.multiSum(3, 1, 2, 3);
print('mutliSum(3, 1, 2, 3) return $resultMultiSum');
}
typedef CXX_Sum_Func = Int32 Function(Int32, Int32);
typedef Dart_Sum_Func = int Function(int, int);
typedef CXX_Substract_Func = Int32 Function(Pointer<Int32>, Int32);
typedef Dart_Substract_Func = int Function(Pointer<Int32>, int);
typedef CXX_Multiply_Func = Pointer<Int32> Function(Int32, Int32);
typedef Dart_Multiply_Func = Pointer<Int32> Function(int, int);
typedef CXX_MultiSum_Func = Int32 Function(Int32 n_count, Int32, Int32, Int32);
typedef Dart_MultiSum_Fun = int Function(int n_coun, int, int, int);
class MathFunctions {
final Dart_Sum_Func sum;
final Dart_Substract_Func substract;
final Dart_Multiply_Func myltiply;
final Dart_MultiSum_Fun multiSum;
static Future<MathFunctions> loadFunctions() async {
final libMath = await _loadMathLibrary();
final sum = libMath.lookupFunction<CXX_Sum_Func, Dart_Sum_Func>('sum');
final substract = libMath
.lookupFunction<CXX_Substract_Func, Dart_Substract_Func>('substract');
final multiply = libMath
.lookupFunction<CXX_Multiply_Func, Dart_Multiply_Func>('multiply');
final multi_sum = libMath
.lookupFunction<CXX_MultiSum_Func, Dart_MultiSum_Fun>('multi_sum');
return MathFunctions._internals(sum, substract, multiply, multi_sum);
}
static Future<DynamicLibrary> _loadMathLibrary() async{
final fileName = await buildAndGetFileNameLib('primitives_lib');
final libMath = DynamicLibrary.open(fileName);
return libMath;
}
MathFunctions._internals(
this.sum, this.substract, this.myltiply, this.multiSum);
}