stamen

0 #include <cmath>

1 #include <format>

2 #include <iostream>

3

4 #include "stamen/stamen.hpp"

5

6 #include "stamen/menu.h"

7

8 namespace stamen {

9

10 int builtin_display(const char* title, const item_t itemv[], size_t size)

11 {

12 const auto items = std::span(itemv, size);

13 const size_t dgts = static_cast<size_t>(std::log10(size)) + 1;

14 int choice = 0;

15

16 while (true)

17 {

18 std::cout << std::format("{}:\n", title);

19 for (auto i = 0UL; i < size; i++)

20 {

21 std::cout << std::format(" {:{}}. {}\n", i, dgts, items[i].prompt);

22 }

23

24 while (true)

25 {

26 std::cout << "Choose an option: ";

27 if (std::cin >> choice && choice >= -1

28 && choice < static_cast<int>(size))

29 {

30 if (choice == -1)

31 {

32 std::cout << "Choice: back\n";

33 return 1;

34 }

35

36 const auto uchoice = static_cast<size_t>(choice);

37 std::cout << "Choice: " << items[uchoice].prompt << "\n\n";

38 const int res = items[uchoice].callback(uchoice);

39

40 if (res < 2) break;

41 return res - 1;

42 }

43

44 if (std::cin.eof())

45 {

46 std::cerr << "encountered end of input!\n";

47 return std::numeric_limits<int>::max();

48 }

49

50 std::cin.clear();

51 std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');

52 std::cout << "Invalid option, please choose again!\n";

53 }

54 std::cout << std::endl;

55 }

56

57 return 1;

58 }

59

60 } // namespace stamen