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normed most of the line lib

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This commit is contained in:
Maieul BOYER 2024-07-11 18:35:56 +02:00
parent 2cfce88274
commit 79e039c94a
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12 changed files with 751 additions and 597 deletions
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4
allocator/Makefile
View file

@ -6,7 +6,7 @@
# By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ #
# +#+#+#+#+#+ +#+ #
# Created: 2023/11/03 13:20:01 by maiboyer #+# #+# #
# Updated: 2024/07/11 17:11:52 by maiboyer ### ########.fr #
# Updated: 2024/07/11 18:33:48 by maiboyer ### ########.fr #
# #
# **************************************************************************** #
@ -25,6 +25,8 @@ TARGET = $(BUILD_DIR)/$(NAME)
CC ?= clang
CFLAGS = -Wno-unused-command-line-argument -Wall -Werror -Wextra -g3 -L$(BUILD_DIR) -MMD -rdynamic -DBASE_PATH='"$(BASE_PATH)/"'
# CFLAGS += -fsanitize=address -fno-omit-frame-pointer -fsanitize-address-use-after-return=runtime -fno-common -fsanitize-address-use-after-scope
CFLAGS += $(CFLAGS_ADD)
BONUS_FILES =
LIBS_NAME =
SUBJECT_URL =

4
line/include/line/_line_functions.h
View file

@ -6,7 +6,7 @@
/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/07/10 15:23:25 by maiboyer #+# #+# */
/* Updated: 2024/07/10 15:38:46 by maiboyer ### ########.fr */
/* Updated: 2024/07/11 18:24:26 by maiboyer ### ########.fr */
/* */
/* ************************************************************************** */
@ -16,7 +16,6 @@
# include "line/_line_structs.h"
# include "me/fs/fs.h"
# include "me/types.h"
# include "me/vec/vec_str.h"
t_error line_edit_insert(t_line_state *state, char c);
t_error line_edit_start(t_line_state *state, t_fd *stdin_fd, t_fd *stdout_fd,
@ -39,6 +38,7 @@ t_error line_history_load(t_str name);
t_error line_history_save(t_str name);
void line_clear_screen(t_fd *output);
void line_refresh_line(t_line_state *state);
void line_refresh(t_line_state *state, t_line_flags flags);
void line_hide(t_line_state *state);
void line_show(t_line_state *state);

8
line/src.list
View file

@ -1,2 +1,10 @@
line
line_edit_actions
line_edit_actions2
line_edit_mode
line_editing
line_editing2
line_globals
line_history
line_internals
line_no_tty

602
line/src/line.c
View file

@ -6,14 +6,12 @@
/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/07/07 16:53:27 by maiboyer #+# #+# */
/* Updated: 2024/07/10 16:37:02 by maiboyer ### ########.fr */
/* Updated: 2024/07/11 18:26:46 by maiboyer ### ########.fr */
/* */
/* ************************************************************************** */
#include "line/_line_internal.h"
#include "line/line.h"
#include "me/fs/fs.h"
#include "me/gnl/gnl.h"
#include "me/mem/mem.h"
#include "me/printf/printf.h"
#include "me/str/str.h"
@ -24,478 +22,10 @@
#include <sys/ioctl.h>
#include <termios.h>
/* ======================= Low level terminal handling ====================== */
// FIXME: remove the sscanf here !
/* Use the ESC [6n escape sequence to query the horizontal cursor position
* and return it. On error -1 is returned, on success the position of the
* cursor. */
t_error line_get_cursor_position(t_fd *input, t_fd *output, t_u32 *column_out)
static t_str _set_line_edit_feed(t_line_state *state, t_str *res)
{
char buf[32];
t_u32 i;
t_i32 cols;
t_i32 rows;
i = 0;
if (write_fd(output, (t_u8 *)"\x1b[6n", 4, NULL))
return (ERROR);
while (i < sizeof(buf) - 1)
{
if (read_fd(input, (t_u8 *)(buf + i), 1, NULL))
break ;
if (buf[i] == 'R')
break ;
i++;
}
buf[i] = '\0';
if (buf[0] != K_ESC && buf[1] != '[')
return (ERROR);
if (sscanf(buf + 2, "%d;%d", &rows, &cols) != 2)
return (ERROR);
return (*column_out = cols, NO_ERROR);
}
/* Try to get the number of columns in the current terminal, or assume 80
* if it fails. */
t_u32 line_get_columns(t_fd *input, t_fd *output)
{
struct winsize ws;
t_u32 cols;
t_u32 start;
if (ioctl(1, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0)
{
if (line_get_cursor_position(input, output, &start))
return (80);
me_printf_fd(output, "\x1b[999C");
if (line_get_cursor_position(input, output, &cols))
return (80);
if (cols > start)
me_printf_fd(output, "\x1b[%dD", cols - start);
return (cols);
}
else
return (ws.ws_col);
}
/* Clear the screen. Used to handle ctrl+l */
void line_clear_screen(t_fd *output)
{
me_printf_fd(output, "\x1b[H\x1b[2J");
}
/* Raw mode: 1960 magic shit. */
t_error line_enable_raw_mode(t_fd *fd)
{
struct termios raw;
t_raw_mode_state *raw_state;
raw_state = get_raw_mode_state();
if (!isatty(fd->fd))
return (errno = ENOTTY, ERROR);
if (tcgetattr(fd->fd, &raw_state->state) == -1)
return (errno = ENOTTY, ERROR);
raw = raw_state->state;
raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
raw.c_oflag &= ~(OPOST);
raw.c_cflag |= (CS8);
raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
raw.c_cc[VMIN] = 1;
raw.c_cc[VTIME] = 0;
if (tcsetattr(fd->fd, TCSAFLUSH, &raw) < 0)
return (errno = ENOTTY, ERROR);
raw_state->enabled = true;
return (NO_ERROR);
}
void line_disable_raw_mode(t_fd *fd)
{
t_raw_mode_state *state;
state = get_raw_mode_state();
if (state->enabled && tcsetattr(fd->fd, TCSAFLUSH, &state->state) != -1)
state->enabled = false;
}
/* =========================== Line editing ================================= */
/* We define a very simple "append buffer" structure, that is an heap
* allocated string where we can append to. This is useful in order to
* write all the escape sequences in a buffer and flush them to the standard
* output in a single call, to avoid flickering effects. */
void _modify_vars(t_usize *a, t_usize *b, bool operation)
{
if (!operation)
{
*a = 0;
*b = 0;
}
else
{
*a += 1;
*b += 1;
}
}
t_usize line_get_prompt_len(t_const_str s)
{
t_usize i;
t_usize ret;
t_isize color;
if ((_modify_vars(&i, &ret, false), true) && s == NULL)
return (0);
while (s[i])
{
if (s[i] == '\x1b' && s[i++] == '[')
{
color = ((void)(i++), 0);
while (color >= 0)
{
while (((void)color--, true) && s[i] >= '0' && s[i] <= '9')
color += ((void)(i++), 2);
if (s[i] == ';')
i++;
else if (s[i] == 'm' && ((void)i++, true))
break ;
}
}
_modify_vars(&i, &ret, true);
}
return (ret);
}
/* Single line low level line refresh.
*
* Rewrite the currently edited line accordingly to the buffer content,
* cursor position, and number of columns of the terminal.
*
* Flags is REFRESH_* macros. The function can just remove the old
* prompt, just write it, or both. */
void line_refresh(t_line_state *state, t_line_flags flags)
{
t_string str;
str = string_new(64);
string_push(&str, "\r\x1b[2K");
if (flags & REFRESH_WRITE)
me_printf_str(&str, "%s%s\x1b[0G\x1b[%uC", state->prompt,
state->buf.buf, state->pos + line_get_prompt_len(state->prompt));
me_printf_fd(state->output_fd, "%s", str.buf);
string_free(str);
}
/* Utility function to avoid specifying REFRESH_ALL all the times. */
void line_refresh_line(t_line_state *state)
{
line_refresh(state, REFRESH_ALL);
}
/* Hide the current line, when using the multiplexing API. */
void line_hide(t_line_state *state)
{
line_refresh(state, REFRESH_CLEAN);
}
/* Show the current line, when using the multiplexing API. */
void line_show(t_line_state *state)
{
line_refresh(state, REFRESH_WRITE);
}
/* Insert the character 'c' at cursor current position.
*
* On error writing to the terminal -1 is returned, otherwise 0. */
t_error line_edit_insert(t_line_state *state, char c)
{
if (state->pos == state->buf.len)
{
if (string_push_char(&state->buf, c))
return (ERROR);
}
else if (string_insert_char(&state->buf, state->pos, c))
return (ERROR);
state->pos++;
line_refresh_line(state);
return (NO_ERROR);
}
/* Move cursor on the left. */
void line_edit_move_left(t_line_state *state)
{
if (state->pos > 0)
{
state->pos--;
line_refresh_line(state);
}
}
/* Move cursor on the right. */
void line_edit_move_right(t_line_state *state)
{
if (state->pos != state->buf.len)
{
state->pos++;
line_refresh_line(state);
}
}
/* Move cursor to the start of the line. */
void line_edit_move_home(t_line_state *state)
{
if (state->pos != 0)
{
state->pos = 0;
line_refresh_line(state);
}
}
/* Move cursor to the end of the line. */
void line_edit_move_end(t_line_state *state)
{
if (state->pos != state->buf.len)
{
state->pos = state->buf.len;
line_refresh_line(state);
}
}
/* Substitute the currently edited line with the next or previous history
* entry as specified by 'dir'. */
void line_edit_history_next(t_line_state *state,
t_history_direction direction)
{
t_vec_str *history;
t_isize dir;
history = get_history();
if (history->len > 1)
{
mem_free(history->buffer[history->len - 1 - state->history_index]);
history->buffer[history->len - 1
- state->history_index] = str_clone(state->buf.buf);
dir = -1;
if (direction == HIST_PREV)
dir = 1;
state->history_index += dir;
if (state->history_index < 0)
return ((void)(state->history_index = 0));
else if ((t_usize)state->history_index >= history->len)
return ((void)(state->history_index = history->len - 1));
string_clear(&state->buf);
string_push(&state->buf, history->buffer[history->len - 1
- state->history_index]);
state->pos = state->buf.len;
line_refresh_line(state);
}
}
/* Delete the character at the right of the cursor without altering the cursor
* position. Basically this is what happens with the "Delete" keyboard key. */
void line_edit_delete(t_line_state *state)
{
string_remove(&state->buf, state->pos, NULL);
line_refresh_line(state);
}
/* Backspace implementation. */
void line_edit_backspace(t_line_state *state)
{
if (state->pos > 0)
{
string_remove(&state->buf, state->pos - 1, NULL);
state->pos--;
line_refresh_line(state);
}
}
/* This function is part of the multiplexed API of Linenoise, that is used
* in order to implement the blocking variant of the API but can also be
* called by the user directly in an event driven program. It will:
*
* 1. Initialize the linenoise state passed by the user.
* 2. Put the terminal in RAW mode.
* 3. Show the prompt.
* 4. Return control to the user, that will have to call linenoiseEditFeed()
* each time there is some data arriving in the standard input.
*
* The user can also call linenoiseEditHide() and linenoiseEditShow() if it
* is required to show some input arriving asyncronously, without mixing
* it with the currently edited line.
*
* When linenoiseEditFeed() returns non-NULL, the user finished with the
* line editing session (pressed enter CTRL-D/C): in this case the caller
* needs to call linenoiseEditStop() to put back the terminal in normal
* mode. This will not destroy the buffer, as long as the linenoiseState
* is still valid in the context of the caller.
*
* The function returns 0 on success, or -1 if writing to standard output
* fails. If stdin_fd or stdout_fd are set to -1, the default is to use
* STDIN_FILENO and STDOUT_FILENO.
*/
t_error line_edit_start(t_line_state *state, t_fd *stdin_fd, t_fd *stdout_fd,
t_const_str prompt)
{
if (stdin_fd == NULL)
stdin_fd = get_stdin();
if (stdout_fd == NULL)
stdout_fd = get_stdout();
state->input_fd = stdin_fd;
state->output_fd = stdout_fd;
state->buf = string_new(4096);
state->prompt = prompt;
state->prompt_len = str_len(state->prompt);
state->pos = 0;
if (line_enable_raw_mode(state->input_fd))
return (ERROR);
state->columns = line_get_columns(stdin_fd, stdout_fd);
state->history_index = 0;
if (!isatty(state->input_fd->fd))
return (NO_ERROR);
line_history_add("");
if (write_fd(state->output_fd, (t_u8 *)prompt, state->prompt_len, NULL))
return (ERROR);
return (NO_ERROR);
}
/* This function is part of the multiplexed API of linenoise, see the top
* comment on linenoiseEditStart() for more information. Call this function
* each time there is some data to read from the standard input file
* descriptor. In the case of blocking operations, this function can just be
* called in a loop, and block.
*
* The function returns get_unfinished_str() to signal that line editing is still
* in progress, that is, the user didn't yet pressed enter / CTRL-D. Otherwise
* the function returns the pointer to the heap-allocated buffer with the
* edited line, that the user should mem_free with linenoiseFree().
*
* On special conditions, NULL is returned and errno is populated:
*
* EAGAIN if the user pressed Ctrl-C
* ENOENT if the user pressed Ctrl-D
*
* Some other errno: I/O error.
*/
t_str line_edit_feed(t_line_state *state)
{
char c;
t_isize nread;
char seq[3];
t_vec_str *history;
t_str tmp;
if (!isatty(state->input_fd->fd))
return (line_no_tty_impl());
history = get_history();
if (read_fd(state->input_fd, (t_u8 *)&c, 1, &nread))
return (NULL);
if (c == K_NEWLINE || c == K_ENTER)
{
if (!vec_str_pop(history, &tmp))
mem_free(tmp);
return (str_clone(state->buf.buf));
}
else if (c == K_CTRL_C)
return (errno = EAGAIN, NULL);
else if (c == K_BACKSPACE || c == K_CTRL_H)
line_edit_backspace(state);
else if (c == K_CTRL_D)
{
if (state->buf.len > 0)
line_edit_delete(state);
else
{
history->len--;
mem_free(history->buffer[history->len]);
return (errno = ENOENT, NULL);
}
}
else if (c == K_CTRL_B)
line_edit_move_left(state);
else if (c == K_CTRL_F)
line_edit_move_right(state);
else if (c == K_CTRL_P)
line_edit_history_next(state, HIST_PREV);
else if (c == K_CTRL_N)
line_edit_history_next(state, HIST_PREV);
else if (c == K_ESC)
{
if (read_fd(state->input_fd, (t_u8 *)seq, 1, NULL))
return ((t_str)get_unfinished_str());
if (read_fd(state->input_fd, (t_u8 *)(seq + 1), 1, NULL))
return ((t_str)get_unfinished_str());
if (seq[0] == '[')
{
if (seq[1] >= '0' && seq[1] <= '9')
{
if (read_fd(state->input_fd, (t_u8 *)(seq + 2), 1, NULL))
return ((t_str)get_unfinished_str());
if (seq[1] == '3' && seq[2] == '~')
line_edit_delete(state);
}
else
{
if (seq[1] == 'A')
line_edit_history_next(state, HIST_PREV);
if (seq[1] == 'B')
line_edit_history_next(state, HIST_NEXT);
if (seq[1] == 'C')
line_edit_move_right(state);
if (seq[1] == 'D')
line_edit_move_left(state);
if (seq[1] == 'H')
line_edit_move_home(state);
if (seq[1] == 'F')
line_edit_move_end(state);
}
}
else if (seq[0] == 'O')
{
if (seq[1] == 'H')
line_edit_move_home(state);
if (seq[1] == 'F')
line_edit_move_end(state);
}
}
else if (c == K_CTRL_U)
{
string_clear(&state->buf);
state->pos = 0;
line_refresh_line(state);
}
else if (c == K_CTRL_K)
{
string_clear_after(&state->buf, state->pos);
line_refresh_line(state);
}
else if (c == K_CTRL_A)
line_edit_move_home(state);
else if (c == K_CTRL_E)
line_edit_move_end(state);
else if (c == K_CTRL_L)
{
line_clear_screen(state->output_fd);
line_refresh_line(state);
}
else if (line_edit_insert(state, c))
return (NULL);
return ((t_str)get_unfinished_str());
}
/* This is part of the multiplexed linenoise API. See linenoiseEditStart()
* for more information. This function is called when linenoiseEditFeed()
* returns something different than NULL. At this point the user input
* is in the buffer, and we can restore the terminal in normal mode. */
void line_edit_stop(t_line_state *state)
{
if (!isatty(state->input_fd->fd))
return ;
line_disable_raw_mode(state->input_fd);
me_printf_fd(state->output_fd, "\n");
string_free(state->buf);
*res = line_edit_feed(state);
return (*res);
}
/* This just implements a blocking loop for the multiplexed API.
@ -504,44 +34,16 @@ void line_edit_stop(t_line_state *state)
* and return the buffer. */
t_str line_blocking_edit(t_fd *stdin_fd, t_fd *stdout_fd, t_const_str prompt)
{
t_line_state l;
t_line_state state;
t_str res;
line_edit_start(&l, stdin_fd, stdout_fd, prompt);
while ((res = line_edit_feed(&l)) == get_unfinished_str())
line_edit_start(&state, stdin_fd, stdout_fd, prompt);
while (_set_line_edit_feed(&state, &res) == get_unfinished_str())
;
line_edit_stop(&l);
line_edit_stop(&state);
return (res);
}
/* This function is called when linenoise() is called with the standard
* input file descriptor not attached to a TTY. So for example when the
* program using linenoise is called in pipe or with a file redirected
* to its standard input. In this case, we want to be able to return the
* line regardless of its length (by default we are limited to 4k). */
t_str line_no_tty_impl(void)
{
t_string line;
t_isize ret;
char chr;
line = string_new(16);
while (true)
{
chr = '\n';
if (read_fd(get_stdin(), (t_u8 *)&chr, 1, &ret))
return (string_free(line), NULL);
if (ret == 0 || chr == '\n')
{
if (line.len == 0)
return (string_free(line), NULL);
return (line.buf);
}
else
string_push_char(&line, chr);
}
}
/* The high level function that is the main API of the linenoise library.
* This function checks if the terminal has basic capabilities, just checking
* for a blacklist of stupid terminals, and later either calls the line
@ -556,91 +58,3 @@ t_str linenoise(t_const_str prompt)
retval = line_blocking_edit(get_stdin(), get_stdout(), prompt);
return (retval);
}
/* ================================ History ================================= */
/* This is the API call to add a new entry in the linenoise history.
* It uses a fixed array of char pointers that are shifted (memmoved)
* when the history max length is reached in order to remove the older
* entry and make room for the new one, so it is not exactly suitable for huge
* histories, but will work well for a few hundred of entries.
*
* Using a circular buffer is smarter, but a bit more complex to handle. */
bool line_history_add(t_const_str line)
{
t_str linecopy;
t_vec_str *history;
history = get_history();
if (history->len != 0 && str_compare(history->buffer[history->len - 1], line))
return (false);
linecopy = str_clone(line);
if (linecopy == NULL)
return (false);
vec_str_push(history, linecopy);
return (true);
}
/* Save the history in the specified file. On success 0 is returned
* otherwise -1 is returned. */
t_error line_history_save(t_str name)
{
t_fd *fd;
t_usize j;
t_vec_str *history;
history = get_history();
fd = open_fd(name, FD_READ, FD_CLOSE_ON_EXEC | FD_TRUNCATE | FD_CREATE, \
FP_OWRITE);
if (fd == NULL)
return (ERROR);
j = 0;
while (j < history->len)
{
write_fd(fd, (t_u8 *)history->buffer[j], str_len(history->buffer[j]),
NULL);
write_fd(fd, (t_u8 *)"\n", 1, NULL);
j++;
}
close_fd(fd);
return (NO_ERROR);
}
t_error gnl_wrapper(t_fd *fd, t_string *out)
{
bool error;
t_string value;
if (out == NULL || fd == NULL)
return (ERROR);
value = get_next_line(fd->fd, &error);
if (error)
return (ERROR);
return (*out = value, NO_ERROR);
}
/* Load the history from the specified file. If the file does not exist
* zero is returned and no operation is performed.
*
* If the file exists and the operation succeeded 0 is returned, otherwise
* on error -1 is returned. */
t_error line_history_load(t_str name)
{
t_fd *fd;
t_string tmp;
t_vec_str *history;
fd = open_fd(name, FD_READ, FD_CLOSE_ON_EXEC, FP_ALL_READ);
if (fd == NULL)
return (ERROR);
history = get_history();
while (!gnl_wrapper(fd, &tmp))
{
while (tmp.len != 0 && (tmp.buf[tmp.len - 1] == '\n' || \
tmp.buf[tmp.len - 1] == '\r'))
string_pop(&tmp);
vec_str_push(history, tmp.buf);
}
close_fd(fd);
return (NO_ERROR);
}

71
line/src/line_edit_actions.c Normal file
View file

@ -0,0 +1,71 @@
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* line_edit_actions.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/07/11 18:24:03 by maiboyer #+# #+# */
/* Updated: 2024/07/11 18:24:20 by maiboyer ### ########.fr */
/* */
/* ************************************************************************** */
#include "line/_line_functions.h"
#include "line/_line_structs.h"
/* Insert the character 'c' at cursor current position.
*
* On error writing to the terminal -1 is returned, otherwise 0. */
t_error line_edit_insert(t_line_state *state, char c)
{
if (state->pos == state->buf.len)
{
if (string_push_char(&state->buf, c))
return (ERROR);
}
else if (string_insert_char(&state->buf, state->pos, c))
return (ERROR);
state->pos++;
line_refresh_line(state);
return (NO_ERROR);
}
/* Move cursor on the left. */
void line_edit_move_left(t_line_state *state)
{
if (state->pos > 0)
{
state->pos--;
line_refresh_line(state);
}
}
/* Move cursor on the right. */
void line_edit_move_right(t_line_state *state)
{
if (state->pos != state->buf.len)
{
state->pos++;
line_refresh_line(state);
}
}
/* Move cursor to the start of the line. */
void line_edit_move_home(t_line_state *state)
{
if (state->pos != 0)
{
state->pos = 0;
line_refresh_line(state);
}
}
/* Move cursor to the end of the line. */
void line_edit_move_end(t_line_state *state)
{
if (state->pos != state->buf.len)
{
state->pos = state->buf.len;
line_refresh_line(state);
}
}

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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* line_edit_actions2.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/07/11 18:24:49 by maiboyer #+# #+# */
/* Updated: 2024/07/11 18:25:55 by maiboyer ### ########.fr */
/* */
/* ************************************************************************** */
#include "line/_line_functions.h"
#include "line/_line_internal.h"
#include "line/_line_structs.h"
#include "me/mem/mem.h"
#include "me/str/str.h"
#include "me/vec/vec_str.h"
/* Substitute the currently edited line with the next or previous history
* entry as specified by 'dir'. */
void line_edit_history_next(t_line_state *state,
t_history_direction direction)
{
t_vec_str *history;
t_isize dir;
history = get_history();
if (history->len > 1)
{
mem_free(history->buffer[history->len - 1 - state->history_index]);
history->buffer[history->len - 1
- state->history_index] = str_clone(state->buf.buf);
dir = -1;
if (direction == HIST_PREV)
dir = 1;
state->history_index += dir;
if (state->history_index < 0)
return ((void)(state->history_index = 0));
else if ((t_usize)state->history_index >= history->len)
return ((void)(state->history_index = history->len - 1));
string_clear(&state->buf);
string_push(&state->buf, history->buffer[history->len - 1
- state->history_index]);
state->pos = state->buf.len;
line_refresh_line(state);
}
}
/* Delete the character at the right of the cursor without altering the cursor
* position. Basically this is what happens with the "Delete" keyboard key. */
void line_edit_delete(t_line_state *state)
{
string_remove(&state->buf, state->pos, NULL);
line_refresh_line(state);
}
/* Backspace implementation. */
void line_edit_backspace(t_line_state *state)
{
if (state->pos > 0)
{
string_remove(&state->buf, state->pos - 1, NULL);
state->pos--;
line_refresh_line(state);
}
}

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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* line_edit_mode.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/07/11 18:26:32 by maiboyer #+# #+# */
/* Updated: 2024/07/11 18:27:56 by maiboyer ### ########.fr */
/* */
/* ************************************************************************** */
#include "line/_line_functions.h"
#include "line/_line_internal.h"
#include "line/_line_structs.h"
#include "me/fs/fs.h"
#include "me/mem/mem.h"
#include "me/printf/printf.h"
#include "me/str/str.h"
#include "me/vec/vec_str.h"
#include <errno.h>
/* This function is part of the multiplexed API of Linenoise, that is used
* in order to implement the blocking variant of the API but can also be
* called by the user directly in an event driven program. It will:
*
* 1. Initialize the linenoise state passed by the user.
* 2. Put the terminal in RAW mode.
* 3. Show the prompt.
* 4. Return control to the user, that will have to call linenoiseEditFeed()
* each time there is some data arriving in the standard input.
*
* The user can also call linenoiseEditHide() and linenoiseEditShow() if it
* is required to show some input arriving asyncronously, without mixing
* it with the currently edited line.
*
* When linenoiseEditFeed() returns non-NULL, the user finished with the
* line editing session (pressed enter CTRL-D/C): in this case the caller
* needs to call linenoiseEditStop() to put back the terminal in normal
* mode. This will not destroy the buffer, as long as the linenoiseState
* is still valid in the context of the caller.
*
* The function returns 0 on success, or -1 if writing to standard output
* fails. If stdin_fd or stdout_fd are set to -1, the default is to use
* STDIN_FILENO and STDOUT_FILENO.
*/
t_error line_edit_start(t_line_state *state, t_fd *stdin_fd, t_fd *stdout_fd,
t_const_str prompt)
{
if (stdin_fd == NULL)
stdin_fd = get_stdin();
if (stdout_fd == NULL)
stdout_fd = get_stdout();
state->input_fd = stdin_fd;
state->output_fd = stdout_fd;
state->buf = string_new(4096);
state->prompt = prompt;
state->prompt_len = str_len(state->prompt);
state->pos = 0;
if (line_enable_raw_mode(state->input_fd))
return (ERROR);
state->columns = line_get_columns(stdin_fd, stdout_fd);
state->history_index = 0;
if (!isatty(state->input_fd->fd))
return (NO_ERROR);
line_history_add("");
if (write_fd(state->output_fd, (t_u8 *)prompt, state->prompt_len, NULL))
return (ERROR);
return (NO_ERROR);
}
/* This function is part of the multiplexed API of linenoise, see the top
* comment on linenoiseEditStart() for more information. Call this function
* each time there is some data to read from the standard input file
* descriptor. In the case of blocking operations, this function can just be
* called in a loop, and block.
*
* The function returns get_unfinished_str() to signal that line editing is still
* in progress, that is, the user didn't yet pressed enter / CTRL-D. Otherwise
* the function returns the pointer to the heap-allocated buffer with the
* edited line, that the user should mem_free with linenoiseFree().
*
* On special conditions, NULL is returned and errno is populated:
*
* EAGAIN if the user pressed Ctrl-C
* ENOENT if the user pressed Ctrl-D
*
* Some other errno: I/O error.
*/
t_str line_edit_feed(t_line_state *state)
{
char c;
t_isize nread;
char seq[3];
t_vec_str *history;
t_str tmp;
if (!isatty(state->input_fd->fd))
return (line_no_tty_impl());
history = get_history();
if (read_fd(state->input_fd, (t_u8 *)&c, 1, &nread))
return (NULL);
if (c == K_NEWLINE || c == K_ENTER)
{
if (!vec_str_pop(history, &tmp))
mem_free(tmp);
return (str_clone(state->buf.buf));
}
else if (c == K_CTRL_C)
return (errno = EAGAIN, NULL);
else if (c == K_BACKSPACE || c == K_CTRL_H)
line_edit_backspace(state);
else if (c == K_CTRL_D)
{
if (state->buf.len > 0)
line_edit_delete(state);
else
{
history->len--;
mem_free(history->buffer[history->len]);
return (errno = ENOENT, NULL);
}
}
else if (c == K_CTRL_B)
line_edit_move_left(state);
else if (c == K_CTRL_F)
line_edit_move_right(state);
else if (c == K_CTRL_P)
line_edit_history_next(state, HIST_PREV);
else if (c == K_CTRL_N)
line_edit_history_next(state, HIST_PREV);
else if (c == K_ESC)
{
if (read_fd(state->input_fd, (t_u8 *)seq, 1, NULL))
return ((t_str)get_unfinished_str());
if (read_fd(state->input_fd, (t_u8 *)(seq + 1), 1, NULL))
return ((t_str)get_unfinished_str());
if (seq[0] == '[')
{
if (seq[1] >= '0' && seq[1] <= '9')
{
if (read_fd(state->input_fd, (t_u8 *)(seq + 2), 1, NULL))
return ((t_str)get_unfinished_str());
if (seq[1] == '3' && seq[2] == '~')
line_edit_delete(state);
}
else
{
if (seq[1] == 'A')
line_edit_history_next(state, HIST_PREV);
if (seq[1] == 'B')
line_edit_history_next(state, HIST_NEXT);
if (seq[1] == 'C')
line_edit_move_right(state);
if (seq[1] == 'D')
line_edit_move_left(state);
if (seq[1] == 'H')
line_edit_move_home(state);
if (seq[1] == 'F')
line_edit_move_end(state);
}
}
else if (seq[0] == 'O')
{
if (seq[1] == 'H')
line_edit_move_home(state);
if (seq[1] == 'F')
line_edit_move_end(state);
}
}
else if (c == K_CTRL_U)
{
string_clear(&state->buf);
state->pos = 0;
line_refresh_line(state);
}
else if (c == K_CTRL_K)
{
string_clear_after(&state->buf, state->pos);
line_refresh_line(state);
}
else if (c == K_CTRL_A)
line_edit_move_home(state);
else if (c == K_CTRL_E)
line_edit_move_end(state);
else if (c == K_CTRL_L)
{
line_clear_screen(state->output_fd);
line_refresh_line(state);
}
else if (line_edit_insert(state, c))
return (NULL);
return ((t_str)get_unfinished_str());
}
/* This is part of the multiplexed linenoise API. See linenoiseEditStart()
* for more information. This function is called when linenoiseEditFeed()
* returns something different than NULL. At this point the user input
* is in the buffer, and we can restore the terminal in normal mode. */
void line_edit_stop(t_line_state *state)
{
if (!isatty(state->input_fd->fd))
return ;
line_disable_raw_mode(state->input_fd);
me_printf_fd(state->output_fd, "\n");
string_free(state->buf);
}

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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* line_editing.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/07/11 18:21:45 by maiboyer #+# #+# */
/* Updated: 2024/07/11 18:28:19 by maiboyer ### ########.fr */
/* */
/* ************************************************************************** */
#include "line/_line_functions.h"
#include "line/_line_internal.h"
#include "line/_line_structs.h"
#include "me/printf/printf.h"
/* =========================== Line editing ================================= */
/* We define a very simple "append buffer" structure, that is an heap
* allocated string where we can append to. This is useful in order to
* write all the escape sequences in a buffer and flush them to the standard
* output in a single call, to avoid flickering effects. */
static void _modify_vars(t_usize *a, t_usize *b, bool operation)
{
if (!operation)
{
*a = 0;
*b = 0;
}
else
{
*a += 1;
*b += 1;
}
}
t_usize line_get_prompt_len(t_const_str s)
{
t_usize i;
t_usize ret;
t_isize color;
if ((_modify_vars(&i, &ret, false), true) && s == NULL)
return (0);
while (s[i])
{
if (s[i] == '\x1b' && s[i++] == '[')
{
color = ((void)(i++), 0);
while (color >= 0)
{
while (((void)color--, true) && s[i] >= '0' && s[i] <= '9')
color += ((void)(i++), 2);
if (s[i] == ';')
i++;
else if (s[i] == 'm' && ((void)i++, true))
break ;
}
}
_modify_vars(&i, &ret, true);
}
return (ret);
}
/* Single line low level line refresh.
*
* Rewrite the currently edited line accordingly to the buffer content,
* cursor position, and number of columns of the terminal.
*
* Flags is REFRESH_* macros. The function can just remove the old
* prompt, just write it, or both. */
void line_refresh(t_line_state *state, t_line_flags flags)
{
t_string str;
str = string_new(64);
string_push(&str, "\r\x1b[2K");
if (flags & REFRESH_WRITE)
me_printf_str(&str, "%s%s\x1b[0G\x1b[%uC", state->prompt,
state->buf.buf, state->pos + line_get_prompt_len(state->prompt));
me_printf_fd(state->output_fd, "%s", str.buf);
string_free(str);
}

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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* line_editing2.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/07/11 18:22:58 by maiboyer #+# #+# */
/* Updated: 2024/07/11 18:23:15 by maiboyer ### ########.fr */
/* */
/* ************************************************************************** */
#include "line/_line_functions.h"
#include "line/_line_internal.h"
#include "line/_line_structs.h"
/* Utility function to avoid specifying REFRESH_ALL all the times. */
void line_refresh_line(t_line_state *state)
{
line_refresh(state, REFRESH_ALL);
}
/* Hide the current line, when using the multiplexing API. */
void line_hide(t_line_state *state)
{
line_refresh(state, REFRESH_CLEAN);
}
/* Show the current line, when using the multiplexing API. */
void line_show(t_line_state *state)
{
line_refresh(state, REFRESH_WRITE);
}

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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* line_history.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/07/11 18:10:24 by maiboyer #+# #+# */
/* Updated: 2024/07/11 18:17:26 by maiboyer ### ########.fr */
/* */
/* ************************************************************************** */
#include "line/_line_functions.h"
#include "line/_line_internal.h"
#include "me/gnl/gnl.h"
#include "me/str/str.h"
#include "me/string/string.h"
#include "me/types.h"
/* ================================ History ================================= */
/* This is the API call to add a new entry in the linenoise history.
* It uses a fixed array of char pointers that are shifted (memmoved)
* when the history max length is reached in order to remove the older
* entry and make room for the new one, so it is not exactly suitable for huge
* histories, but will work well for a few hundred of entries.
*
* Using a circular buffer is smarter, but a bit more complex to handle. */
bool line_history_add(t_const_str line)
{
t_str linecopy;
t_vec_str *history;
history = get_history();
if (history->len != 0 && \
str_compare(history->buffer[history->len - 1], line))
return (false);
linecopy = str_clone(line);
if (linecopy == NULL)
return (false);
vec_str_push(history, linecopy);
return (true);
}
/* Save the history in the specified file. On success 0 is returned
* otherwise -1 is returned. */
t_error line_history_save(t_str name)
{
t_fd *fd;
t_usize j;
t_vec_str *history;
history = get_history();
fd = open_fd(name, FD_READ, FD_CLOSE_ON_EXEC | FD_TRUNCATE | FD_CREATE, \
FP_OWRITE);
if (fd == NULL)
return (ERROR);
j = 0;
while (j < history->len)
{
write_fd(fd, (t_u8 *)history->buffer[j], str_len(history->buffer[j]),
NULL);
write_fd(fd, (t_u8 *)"\n", 1, NULL);
j++;
}
close_fd(fd);
return (NO_ERROR);
}
t_error gnl_wrapper(t_fd *fd, t_string *out)
{
bool error;
t_string value;
if (out == NULL || fd == NULL)
return (ERROR);
value = get_next_line(fd->fd, &error);
if (error)
return (ERROR);
return (*out = value, NO_ERROR);
}
/* Load the history from the specified file. If the file does not exist
* zero is returned and no operation is performed.
*
* If the file exists and the operation succeeded 0 is returned, otherwise
* on error -1 is returned. */
t_error line_history_load(t_str name)
{
t_fd *fd;
t_string tmp;
t_vec_str *history;
fd = open_fd(name, FD_READ, FD_CLOSE_ON_EXEC, FP_ALL_READ);
if (fd == NULL)
return (ERROR);
history = get_history();
while (!gnl_wrapper(fd, &tmp))
{
while (tmp.len != 0 && (tmp.buf[tmp.len - 1] == '\n' || \
tmp.buf[tmp.len - 1] == '\r'))
string_pop(&tmp);
vec_str_push(history, tmp.buf);
}
close_fd(fd);
return (NO_ERROR);
}

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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* line_internals.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/07/11 18:18:46 by maiboyer #+# #+# */
/* Updated: 2024/07/11 18:20:08 by maiboyer ### ########.fr */
/* */
/* ************************************************************************** */
#include "line/_line_functions.h"
#include "line/_line_internal.h"
#include "line/_line_structs.h"
#include "me/printf/printf.h"
#include "me/types.h"
#include <sys/ioctl.h>
#include <errno.h>
/* ======================= Low level terminal handling ====================== */
// FIXME: remove the sscanf here !
/* Use the ESC [6n escape sequence to query the horizontal cursor position
* and return it. On error -1 is returned, on success the position of the
* cursor. */
t_error line_get_cursor_position(t_fd *input, t_fd *output, t_u32 *column_out)
{
char buf[32];
t_u32 i;
t_i32 cols;
t_i32 rows;
i = 0;
if (write_fd(output, (t_u8 *)"\x1b[6n", 4, NULL))
return (ERROR);
while (i < sizeof(buf) - 1)
{
if (read_fd(input, (t_u8 *)(buf + i), 1, NULL))
break ;
if (buf[i] == 'R')
break ;
i++;
}
buf[i] = '\0';
if (buf[0] != K_ESC && buf[1] != '[')
return (ERROR);
if (sscanf(buf + 2, "%d;%d", &rows, &cols) != 2)
return (ERROR);
return (*column_out = cols, NO_ERROR);
}
/* Try to get the number of columns in the current terminal, or assume 80
* if it fails. */
t_u32 line_get_columns(t_fd *input, t_fd *output)
{
struct winsize ws;
t_u32 cols;
t_u32 start;
if (ioctl(1, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0)
{
if (line_get_cursor_position(input, output, &start))
return (80);
me_printf_fd(output, "\x1b[999C");
if (line_get_cursor_position(input, output, &cols))
return (80);
if (cols > start)
me_printf_fd(output, "\x1b[%dD", cols - start);
return (cols);
}
else
return (ws.ws_col);
}
/* Clear the screen. Used to handle ctrl+l */
void line_clear_screen(t_fd *output)
{
me_printf_fd(output, "\x1b[H\x1b[2J");
}
/* Raw mode: 1960 magic shit. */
t_error line_enable_raw_mode(t_fd *fd)
{
struct termios raw;
t_raw_mode_state *raw_state;
raw_state = get_raw_mode_state();
if (!isatty(fd->fd))
return (errno = ENOTTY, ERROR);
if (tcgetattr(fd->fd, &raw_state->state) == -1)
return (errno = ENOTTY, ERROR);
raw = raw_state->state;
raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
raw.c_oflag &= ~(OPOST);
raw.c_cflag |= (CS8);
raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
raw.c_cc[VMIN] = 1;
raw.c_cc[VTIME] = 0;
if (tcsetattr(fd->fd, TCSAFLUSH, &raw) < 0)
return (errno = ENOTTY, ERROR);
raw_state->enabled = true;
return (NO_ERROR);
}
void line_disable_raw_mode(t_fd *fd)
{
t_raw_mode_state *state;
state = get_raw_mode_state();
if (state->enabled && tcsetattr(fd->fd, TCSAFLUSH, &state->state) != -1)
state->enabled = false;
}

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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* line_no_tty.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/07/11 18:10:24 by maiboyer #+# #+# */
/* Updated: 2024/07/11 18:15:42 by maiboyer ### ########.fr */
/* */
/* ************************************************************************** */
#include "me/types.h"
#include "line/_line_internal.h"
#include "line/_line_functions.h"
#include "line/_line_structs.h"
/* This function is called when linenoise() is called with the standard
* input file descriptor not attached to a TTY. So for example when the
* program using linenoise is called in pipe or with a file redirected
* to its standard input. In this case, we want to be able to return the
* line regardless of its length (by default we are limited to 4k). */
t_str line_no_tty_impl(void)
{
t_string line;
t_isize ret;
char chr;
line = string_new(16);
while (true)
{
chr = '\n';
if (read_fd(get_stdin(), (t_u8 *)&chr, 1, &ret))
return (string_free(line), NULL);
if (ret == 0 || chr == '\n')
{
if (line.len == 0)
return (string_free(line), NULL);
return (line.buf);
}
else
string_push_char(&line, chr);
}
}