parse_opt_num.c

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   parse_opt_num.c                                    :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: kfujita <kfujita@student.42tokyo.jp>       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/04/23 02:42:54 by kfujita           #+#    #+#             */
/*   Updated: 2022/04/26 00:22:11 by kfujita          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include "ft_printf_local.h"
#include "../ft_string/ft_string.h"
 
static int  calc_num_len(long num, int base, t_fmt *p_ret)
{
    char    *buf;
 
    buf = p_ret->data.str_buf;
    if (p_ret->type == UINT_16BASE)
    {
        if (p_ret->f_hash && num != 0)
            p_ret->header[0] = '0';
    }
    else if (num < 0)
    {
        p_ret->header[0] = '-';
        num *= -1;
    }
    else if (p_ret->f_plus && p_ret->type != UINT_10BASE)
        p_ret->header[0] = '+';
    else if (p_ret->f_space && p_ret->type != UINT_10BASE)
        p_ret->header[0] = ' ';
    p_ret->head_len = ft_strlen(p_ret->header);
    if (num == 0)
    {
        p_ret->data.c = '0';
        return (1);
    }
    return (get_numstr_base(buf, num, base, p_ret->f_upper));
}
 
static bool parse_num_type(char fmt, t_fmt *p_ret)
{
    if (fmt == 'd' || fmt == 'i')
        p_ret->type = INT_10BASE;
    else if (fmt == 'u')
        p_ret->type = UINT_10BASE;
    else if (fmt == 'x' || fmt == 'X')
    {
        p_ret->type = UINT_16BASE;
        p_ret->header[1] = fmt;
    }
    else
        return (false);
    return (true);
}
 
bool    parse_opt_num(char fmt, va_list *args, t_fmt *p_ret)
{
    if (!parse_num_type(fmt, p_ret))
        return (false);
    if (fmt == 'X')
        p_ret->f_upper = true;
    if (p_ret->type == INT_10BASE)
        p_ret->data.s_digit = va_arg(*args, int);
    else
        p_ret->data.s_digit = va_arg(*args, unsigned int);
    if (p_ret->type == INT_10BASE)
        p_ret->str_len = calc_num_len(p_ret->data.s_digit, 10, p_ret);
    else if (p_ret->type == UINT_10BASE)
        p_ret->str_len = calc_num_len(p_ret->data.u_digit, 10, p_ret);
    else
        p_ret->str_len = calc_num_len(p_ret->data.u_digit, 16, p_ret);
    return (true);
}