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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* b_h.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: rbousset <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/14 17:19:27 by rbousset #+# #+# */
/* Updated: 2020/02/14 17:19:29 by rbousset ### ########lyon.fr */
/* */
/* ************************************************************************** */
#include <libft.h>
#include <stddef.h>
#include <unistd.h>
#include "d_define.h"
#include "f_fail.h"
#include "s_struct.h"
#include "u_utils.h"
static unsigned long b_get_total_hist(t_msh *msh)
{
unsigned long total;
char *ptr;
total = 0;
if (msh->prev_hist != NULL)
{
ptr = msh->prev_hist;
while (*ptr != C_NUL)
{
if (*ptr == C_LF)
total += 1;
ptr++;
}
}
ptr = msh->curr_hist_ptr;
while (*ptr != C_NUL)
{
if (*ptr == C_LF)
total += 1;
ptr++;
}
return (total);
}
static unsigned int b_print_prev_history(unsigned long asked,
unsigned long total,
t_msh *msh)
{
char *hist;
char *tok;
long to_print;
long i;
to_print = total - asked;
to_print = (to_print < 0) ? (0) : (to_print);
i = 1;
if (msh->prev_hist != NULL)
{
if ((hist = ft_strdup(msh->prev_hist)) == NULL)
return (i);
tok = ft_strtok(hist, "\n");
while (tok != NULL)
{
if (i > to_print)
ft_printf("%5lu %s\n", i, tok);
i++;
tok = ft_strtok(NULL, "\n");
}
ft_memdel((void*)&hist);
}
return (i);
}
static void b_print_history(unsigned long asked,
unsigned long total,
t_msh *msh)
{
char *hist;
char *tok;
long to_print;
long i;
to_print = total - asked;
to_print = (to_print < 0) ? (0) : (to_print);
i = b_print_prev_history(asked, total, msh);
if ((hist = ft_strdup(msh->curr_hist_ptr)) == NULL)
return ;
tok = ft_strtok(hist, "\n");
while (tok != NULL)
{
if (i > to_print)
ft_printf("%5lu %s\n", i, tok);
i++;
tok = ft_strtok(NULL, "\n");
}
ft_memdel((void*)&hist);
}
static t_bool b_check_numeric(const char arg[])
{
char *ptr;
ptr = (char*)arg;
while (*ptr != C_NUL)
{
if (ft_isdigit(*ptr) == FALSE)
{
return (FALSE);
}
ptr++;
}
return (TRUE);
}
unsigned char b_h(char *args[], t_msh *msh)
{
const unsigned long argc = u_builtins_get_argc((const char **)args);
if (argc > 1)
{
f_fail_too_many_args("h", msh);
return (127);
}
if (argc == 1 && b_check_numeric(*args) == FALSE)
{
ft_dprintf(STDERR_FILENO,
"minishell: history: %s: numeric argument required\n",
*args);
return (1);
}
else
{
if (argc == 1)
b_print_history(ft_atoi(*args), b_get_total_hist(msh), msh);
else
b_print_history(0, 0, msh);
}
return (0);
}
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