int_to_cstr.h File Reference

#include "stdint.h"
#include "stdlib.h"

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Functions
constexpr bool	is_negative (int32_t i)
constexpr size_t	count_digits (int32_t i)
constexpr char	nth_char (int32_t i, size_t n)
constexpr int	pow_int (int val, size_t pow)
constexpr int	remove_front_digit (int32_t i)
static constexpr size_t	_count_digits_unsigned (uint32_t ui)
static constexpr size_t	count_digits_unsigned (uint32_t ui)
static constexpr char	valid_nth_char_unsigned (uint32_t ui, size_t n)
static constexpr char	nth_char_unsigned (uint32_t ui, size_t n)
static constexpr char	nth_char_negative (int32_t i, size_t n)
static constexpr int	remove_front_digit_unsigned (uint32_t ui)

Function Documentation

is_negative()

constexpr bool is_negative ( int32_t  i )

constexpr

                                      {
    return i < 0;
}

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count_digits()

constexpr size_t count_digits ( int32_t  i )

constexpr

                                         {
    return is_negative(i) ? count_digits_unsigned(-i) + 1 : count_digits_unsigned(i);
}

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nth_char()

constexpr char nth_char ( int32_t  i, size_t  n  )

constexpr

                                             {
    return i < 0 ? nth_char_negative(i, n) : nth_char_unsigned(i, n);
}

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pow_int()

constexpr int pow_int ( int  val, size_t  pow  )

constexpr

                                           {
    return pow == 0 ? 1 : val * pow_int(val, pow - 1);
}

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remove_front_digit()

constexpr int remove_front_digit ( int32_t  i )

constexpr

                                            {
    return i < 0 ? -1 : remove_front_digit_unsigned(i);
}

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_count_digits_unsigned()

static constexpr size_t _count_digits_unsigned ( uint32_t  ui )

staticconstexpr

                                                            {
    return ui > 0 ? _count_digits_unsigned(ui / 10) + 1 : 0;
}

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count_digits_unsigned()

static constexpr size_t count_digits_unsigned ( uint32_t  ui )

staticconstexpr

                                                           {
    return ui == 0 ? 1 : _count_digits_unsigned(ui);
}

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valid_nth_char_unsigned()

static constexpr char valid_nth_char_unsigned ( uint32_t  ui, size_t  n  )

staticconstexpr

                                                                     {
    return n == count_digits_unsigned(ui) - 1 ? (ui % 10) + '0' : valid_nth_char_unsigned(ui / 10, n);
}

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nth_char_unsigned()

static constexpr char nth_char_unsigned ( uint32_t  ui, size_t  n  )

staticconstexpr

                                                               {
    return n >= count_digits_unsigned(ui) ? 0 : valid_nth_char_unsigned(ui, n);
}

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nth_char_negative()

static constexpr char nth_char_negative ( int32_t  i, size_t  n  )

staticconstexpr

                                                             {
    return n == 0 ? '-' : nth_char_unsigned(-i, n - 1);
}

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remove_front_digit_unsigned()

static constexpr int remove_front_digit_unsigned ( uint32_t  ui )

staticconstexpr

                                                              {
    return ui % pow_int(10, count_digits_unsigned(ui));
}

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