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ft_printf_findflags.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_printf_findflags.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: dnakano <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/10/11 08:49:46 by dnakano #+# #+# */
/* Updated: 2020/10/18 14:21:59 by dnakano ### ########.fr */
/* */
/* ************************************************************************** */
#include "libftprintf.h"
static char *ft_printf_setwidth(const char *format, t_printf_flags *flags)
{
t_uint res;
if (*format == '0' && flags->precision != -2)
{
flags->flag = flags->flag | FLAG_ZEROPADDING;
format++;
}
res = 0;
while (ft_isdigit(*format))
{
res = res * 10 + *(format++) - '0';
}
if (flags->precision == -2)
flags->precision = res;
else
flags->width = res;
return ((char *)format);
}
static int ft_printf_isflag(int c)
{
int i;
const char flag_char[] = "-.*lh# +";
if (ft_isdigit(c))
return (1);
i = 0;
while (flag_char[i])
{
if (c == flag_char[i])
return (1);
i++;
}
return (0);
}
static void ft_printf_findflags_lh(char fc, t_printf_flags *flags)
{
if (fc == 'l')
{
if (flags->flag & FLAG_LONG)
flags->flag = flags->flag | FLAG_LONGLONG;
else
flags->flag = flags->flag | FLAG_LONG;
}
else if (fc == 'h')
{
if (flags->flag & FLAG_SHORT)
flags->flag = flags->flag | FLAG_SHORTSHORT;
else
flags->flag = flags->flag | FLAG_SHORT;
}
}
static void ft_printf_findflags_getarg(va_list *ap, t_printf_flags *flags)
{
if (flags->precision == -2)
{
flags->precision = va_arg(*ap, long);
if (flags->precision == -2)
flags->precision = -1;
}
else
ft_printf_getwidth(va_arg(*ap, long), flags);
}
char *ft_printf_findflags(const char *format, va_list *ap,
t_printf_flags *flags)
{
ft_printf_initflags(flags);
while (*format && ft_printf_isflag(*format))
{
if (*format == '-')
flags->flag = flags->flag | FLAG_LEFTADJUST;
if (*format == '+')
flags->flag = flags->flag | FLAG_PUTPOSSIGN;
if (*format == ' ')
flags->flag = flags->flag | FLAG_PUTPOSSPACE;
if (*format == '#')
flags->flag = flags->flag | FLAG_ALTERNATE;
if (*format == '*')
ft_printf_findflags_getarg(ap, flags);
if (*format == '.')
flags->precision = -2;
if (*format == 'l' || *format == 'h')
ft_printf_findflags_lh(*format, flags);
if (ft_isdigit(*format))
format = ft_printf_setwidth(format, flags);
else
format++;
}
if (flags->precision == -2)
flags->precision = 0;
return ((char *)format);
}