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ajout de ft_printf a la librairie

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hugogogo
2021-05-19 18:06:12 +02:00
parent b7340d9324
commit f1ce5b8b9e
10 changed files with 770 additions and 9 deletions
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162
srcs/ft_printf_files/ft_printf.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_printf.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: hulamy <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/03/12 22:31:29 by hulamy #+# #+# */
/* Updated: 2020/06/30 00:41:35 by hulamy ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
/*
** SPECIFIER :
** receive a word as a string, check if it start by '%', and return the
** specifier (diuxXspefgn) and the length (h hh l ll)
** -if s is a string, or is a single '%'
** return NULL (to print is as a string)
** -if s is a double '%%', remove one '%', and
** return NULL (to print is as a string)
** -then s is a conversion, go to the length and specifier
** -copy them in 'string'
** -and remove them from s
** -return the length and specifier in a string
*/
char *specifier(char *s)
{
char *string;
int i;
if (s[0] != '%' || s[1] == '\0')
return (NULL);
if (s[1] == '%')
{
s[1] = '\0';
return (NULL);
}
i = 1;
while (ft_strchr("#0- +'0123456789.*", s[i]) != NULL)
i++;
string = ft_strdup(s + i);
while (s[i] != '\0')
{
s[i] = '\0';
i++;
}
return (string);
}
/*
** -receive 'i' the number in which '*' will expand
** -turn it into a string
** -calculate the total lentgh of the string '%...' for nbr replacing '*'
** -allocate a new string with this length
** -copy the original str with first '*' expanded into it's corresponding nbr
*/
int ft_expand_star(int nbr, char **string)
{
char *s;
char *n;
int i;
int j;
int k;
n = ft_itoa(nbr);
if (!(s = ft_memalloc(sizeof(char) * (ft_strlen(n) + ft_strlen(*string)))))
return (0);
i = -1;
j = 0;
k = 0;
while ((*string)[++i] != '\0')
{
s[j] = (*string)[i];
if (s[j] == '*')
while (n[k] != '\0')
s[j++] = n[k++];
else
j++;
}
free(n);
free(*string);
*string = s;
return (1);
}
/*
** print the string
** because of lake of space, it also free 'type'
*/
int ft_put_word(char *s, char *type, int size)
{
int i;
i = 0;
while (i < size)
write(1, &(s[i++]), 1);
free(type);
free(s);
return (i);
}
/*
** because of lake of space...
** -1 expand the specifier according to its type and its length
** and put in a string 'print'
** -2 transform 'print' according to the flags
*/
char *convert_with_flags(char *s, va_list ap, char *type, int *size)
{
char *print;
if (!(print = ft_convert(ap, type, &s)))
return (NULL);
if (!(print = ft_flag_transform(s, print, type, size)))
return (NULL);
free(s);
return (print);
}
/*
** -printf receive a string to print with a variadic number of arguments
** -it will go in a loop through each 'words'
** -a word is either a string containing no '%' or a conversion starting by '%'
** -if it's a string it's printed right away
** -if it's a conversion it will call convert_with_flags for some actions :
** -1 expand the specifier according to its type and its length
** and put in a string 'print'
** -2 transform 'print' according to the flags
*/
int ft_printf(char *string, ...)
{
char *s;
char *type;
int length;
int size;
va_list ap;
length = 0;
va_start(ap, string);
while ((s = next_word(&string)) != NULL)
{
if ((type = specifier(s)) == NULL)
length += ft_put_word(s, type, ft_strlen(s));
else
{
size = 0;
if (!(s = convert_with_flags(s, ap, type, &size)))
return (-1);
length += ft_put_word(s, type, size);
}
}
free(s);
va_end(ap);
return (length);
}