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set_format.c
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set_format.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* set_format.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: ldulling <ldulling@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2023/10/22 19:27:21 by ldulling #+# #+# */
/* Updated: 2023/10/22 20:21:27 by ldulling ### ########.fr */
/* */
/* ************************************************************************** */
#include "ft_printf.h"
static void set_flags(const char *format, int *i, t_struct *f);
static void set_width(const char *format, int *i, t_struct *f, va_list *ap);
static void set_precision(const char *format, int *i, t_struct *f, va_list *ap);
static void set_specifier(const char *format, int *i, t_struct *f);
int set_format(const char *format, int *i, t_struct *f, va_list *ap)
{
int i_original;
i_original = *i;
if (format[*i])
{
set_flags(format, i, f);
if (format[*i])
{
set_width(format, i, f, ap);
if (format[*i])
{
set_precision(format, i, f, ap);
if (format[*i])
set_specifier(format, i, f);
}
}
}
return (*i - i_original);
}
static void set_flags(const char *format, int *i, t_struct *f)
{
while (1)
{
if (format[*i] == '#')
f->hash = 1;
else if (format[*i] == '+')
f->plus = 1;
else if (format[*i] == ' ')
f->space = 1;
else if (format[*i] == '-')
f->minus = 1;
else if (format[*i] == '0')
f->zero = 1;
else
return ;
(*i)++;
}
}
static void set_width(const char *format, int *i, t_struct *f, va_list *ap)
{
int nbr;
nbr = 0;
if (format[*i] == '*')
{
nbr = va_arg(*ap, int);
if (nbr < 0)
{
if (!f->minus)
f->minus = FROM_NEGATIVE_WIDTH;
nbr *= -1;
}
(*i)++;
}
else
{
while (ft_isdigit(format[*i]))
{
nbr = nbr * 10 + (format[*i] - '0');
(*i)++;
}
}
f->width = nbr;
return ;
}
static void set_precision(const char *format, int *i, t_struct *f, va_list *ap)
{
int nbr;
if (format[*i] == '.')
{
nbr = 0;
(*i)++;
if (format[*i] == '*')
{
nbr = va_arg(*ap, int);
if (nbr < 0)
nbr = NEGATIVE_PRECISION;
(*i)++;
}
else
{
while (ft_isdigit(format[*i]))
{
nbr = nbr * 10 + (format[*i] - '0');
(*i)++;
}
}
f->precision = nbr;
}
return ;
}
static void set_specifier(const char *format, int *i, t_struct *f)
{
char *specifier;
specifier = ft_strchr(SPECIFIERS, format[*i]);
if (specifier)
{
f->specifier = *specifier;
(*i)++;
}
else
f->unresolved = 1;
return ;
}