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ft_printf.c
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ft_printf.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_printf.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: hleung <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/11/18 10:47:46 by hleung #+# #+# */
/* Updated: 2022/11/22 15:41:13 by hleung ### ########lyon.fr */
/* */
/* ************************************************************************** */
#include "ft_printf.h"
int ft_check_format(char c, char *charset)
{
int i;
i = 0;
while (charset[i])
{
if (c == charset[i])
return (1);
i++;
}
return (0);
}
int ft_print_format(va_list ptr, char format)
{
int len;
char *low16;
low16 = "abcdef";
len = 0;
if (format == 'c')
return (len = ft_putchar((unsigned char)va_arg(ptr, int)));
else if (format == 's')
return (len = ft_putstr(va_arg(ptr, char *)));
else if (format == 'd' || format == 'i')
return (len = ft_putnbr(va_arg(ptr, int)));
else if (format == 'p')
{
ft_putstr("0x");
return (len = ft_putadd((unsigned long)va_arg(ptr, void *), low16) + 2);
}
else if (format == 'u')
return (len = ft_putnbr_unsigned(va_arg(ptr, unsigned int)));
else if (format == 'x')
return (len = ft_putnbr_base(va_arg(ptr, int), low16));
else if (format == 'X')
return (len = ft_putnbr_base(va_arg(ptr, int), "ABCDEF"));
else if (format == '%')
return (len = ft_putchar('%'));
return (len);
}
int ft_printf(const char *arg, ...)
{
int i;
int len;
va_list ptr;
len = 0;
i = 0;
va_start(ptr, arg);
if (write(1, 0, 0) == -1)
return (-1);
while (arg[i])
{
if (arg[i] == '%' && ft_check_format(arg[i + 1], "csdipuxX%%"))
{
len += ft_print_format(ptr, arg[i + 1]);
i++;
}
else
len += ft_putchar(arg[i]);
i++;
}
va_end(ptr);
return (len);
}