Fs interal WIP
This commit is contained in:
Maieul BOYER
parent
b1cfc0ee71
commit
a614195a2e
5 changed files with 496 additions and 84 deletions
302
stdme/src/fs/fs_internal.c
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302
stdme/src/fs/fs_internal.c
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/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* fs_internal.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2024/05/19 15:53:50 by maiboyer #+# #+# */
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/* Updated: 2024/05/24 14:44:45 by maiboyer ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "me/types.h"
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#include "me/fs/fs.h"
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#include "me/mem/mem.h"
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#include "me/str/str.h"
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#include <stdio.h>
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#include <dirent.h>
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#include <sys/stat.h>
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#include <errno.h>
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t_fd_array *get_fd_arrays(void)
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{
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static t_fd_array val = {};
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return (&val);
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}
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struct s_file_slot *get_unused_fd_slot(void)
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{
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t_usize i;
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t_fd_array *arr;
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arr = get_fd_arrays();
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i = 0;
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while (i < FILE_SLOT_LEN)
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{
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if (arr->storage[i].ty == SLOT_UNUSED)
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return (&arr->storage[i]);
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i++;
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}
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me_abort(
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"Unable to find slot for a file descriptor, increate FILE_SLOT_LEN");
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return (NULL);
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}
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void close_all_slots(void)
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{
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t_usize i;
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t_fd_array *arr;
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arr = get_fd_arrays();
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i = 0;
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while (i < FILE_SLOT_LEN)
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close_slot(&arr->storage[i++]);
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}
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void close_slot(struct s_file_slot *slot)
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{
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if (slot == NULL)
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return;
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if (slot->ty == SLOT_UNUSED)
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;
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else if (slot->ty == SLOT_FD)
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close_fd(&slot->slot.fd);
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else if (slot->ty == SLOT_DIR)
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close_dir(&slot->slot.dir);
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else if (slot->ty == SLOT_FILE)
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close_file(&slot->slot.file);
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else
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write(2, "Unknown SLOT type", 17);
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mem_set_zero(slot, sizeof(*slot));
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}
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/* ______ _____
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| ____| __ \
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| |__ | | | |
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| __| | | | |
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| | | |__| |
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|_| |_____/
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*/
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t_fd *open_fd(t_str name, t_fd_perm perms, t_file_open_option open_options,
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t_file_perm file_perm)
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{
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t_fd *fd;
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struct s_file_slot *slot;
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int actual_perms;
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if (perms & FD_READ && perms & FD_WRITE)
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actual_perms = O_RDWR;
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else if (perms & FD_READ)
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actual_perms = O_RDONLY;
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else if (perms & FD_WRITE)
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actual_perms = O_WRONLY;
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else
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return (NULL);
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actual_perms |= open_options;
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slot = get_unused_fd_slot();
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fd = &slot->slot.fd;
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fd->fd = open(name, actual_perms, file_perm);
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if (fd->fd == -1)
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return (fd->fd = 0, NULL);
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slot->ty = SLOT_FD;
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fd->name = str_clone(name);
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fd->perms = perms;
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fd->type = FD_FILE;
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return (fd);
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}
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t_error read_fd(t_fd *fd, t_u8 *buffer, t_usize size, t_isize *read_count)
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{
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t_isize ret;
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if (fd == NULL || buffer == NULL || read_count == NULL || fd->fd == -1 || !(fd->perms & FD_READ))
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return (ERROR);
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ret = read(fd->fd, buffer, size);
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if (ret == -1)
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return (ERROR);
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*read_count = ret;
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return (NO_ERROR);
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}
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t_error write_fd(t_fd *fd, t_u8 *buffer, t_usize size, t_isize *write_count)
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{
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t_isize ret;
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t_isize fake_ret;
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if (write_count == NULL)
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write_count = &fake_ret;
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if (fd == NULL || buffer == NULL || fd->fd == -1 || !(fd->perms & FD_WRITE))
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return (ERROR);
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ret = write(fd->fd, buffer, size);
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if (ret == -1)
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return (ERROR);
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*write_count = ret;
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return (NO_ERROR);
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}
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t_error stat_fd(t_fd *fd, t_stat *stat)
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{
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if (fd == NULL || stat == NULL || fd->fd == -1)
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return (ERROR);
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if (fstat(fd->fd, stat) == -1)
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return (ERROR);
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return (NO_ERROR);
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}
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void close_fd(t_fd *fd)
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{
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struct s_file_slot *slot;
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if (fd == NULL)
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return ;
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if (close(fd->fd) == -1)
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return ;
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slot = (void*)(fd) - offsetof(struct s_file_slot, slot.fd);
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mem_set_zero(slot, sizeof(*slot));
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}
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#define INLINE_BUFFER_SIZE 128
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void put_number_fd(t_fd *fd, t_u64 number)
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{
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t_u8 buffer[INLINE_BUFFER_SIZE];
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t_usize i;
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i = 0;
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while (number > 0)
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{
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buffer[i++] = number % 10 + '0';
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number /= 10;
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}
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while (i > 0)
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write_fd(fd, &buffer[--i], 1, NULL);
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}
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void put_string_fd(t_fd *fd, t_const_str string)
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{
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write_fd(fd, (t_u8*)string, str_len(string), NULL);
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}
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void put_char_fd(t_fd *fd, t_u8 c)
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{
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write_fd(fd, &c, 1, NULL);
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}
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/* _____ _____ _____ ______ _____ _______ ____ _______ __
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| __ \_ _| __ \| ____/ ____|__ __/ __ \| __ \ \ / /
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| | | || | | |__) | |__ | | | | | | | | |__) \ \_/ /
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| | | || | | _ /| __|| | | | | | | | _ / \ /
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| |__| || |_| | \ \| |___| |____ | | | |__| | | \ \ | |
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|_____/_____|_| \_\______\_____| |_| \____/|_| \_\ |_|
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*/
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t_error open_dir(t_str name, t_dir **dir)
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{
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t_dir *out;
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struct s_file_slot *slot;
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slot = get_unused_fd_slot();
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out = &slot->slot.dir;
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out->ptr = opendir(name);
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if (out->ptr == NULL)
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return (ERROR);
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slot->ty = SLOT_DIR;
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out->name = str_clone(name);
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*dir = out;
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return (NO_ERROR);
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}
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t_error read_dir(t_dir *dir, t_dir_entry *out)
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{
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struct dirent *entry;
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if (dir == NULL || out == NULL || dir->ptr == NULL)
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return (ERROR);
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errno = 0;
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entry = readdir(dir->ptr);
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if (entry == NULL && errno != 0)
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return (ERROR);
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*out = entry;
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return (NO_ERROR);
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}
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void close_dir(t_dir *dir)
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{
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struct s_file_slot *slot;
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if (dir == NULL)
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return ;
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if (closedir(dir->ptr) == -1)
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return ;
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slot = (void*)(dir) - offsetof(struct s_file_slot, slot.dir);
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mem_set_zero(slot, sizeof(*slot));
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}
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/*______ _____ _ ______
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| ____|_ _| | | ____|
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| |__ | | | | | |__
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| __| | | | | | __|
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| | _| |_| |____| |____
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|_| |_____|______|______|
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*/
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t_error open_file(t_str name, t_mode mode, t_file **file)
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{
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t_file *out;
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struct s_file_slot *slot;
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slot = get_unused_fd_slot();
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out = &slot->slot.file;
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out->ptr = fopen(name, mode);
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if (out->ptr == NULL)
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return (ERROR);
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slot->ty = SLOT_FILE;
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out->name = str_clone(name);
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*file = out;
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return (NO_ERROR);
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}
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t_error write_file(t_file *file, t_u8 *buffer, t_usize size, t_isize *write_count)
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{
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t_isize ret;
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t_isize fake_ret;
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if (write_count == NULL)
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write_count = &fake_ret;
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if (file == NULL || buffer == NULL || file->ptr == NULL)
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return (ERROR);
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ret = fwrite(buffer, size, 1, file->ptr);
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if (ret == -1)
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return (ERROR);
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*write_count = ret;
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return (NO_ERROR);
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}
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t_error read_file(t_file *file, t_u8 *buffer, t_usize size, t_isize *read_count)
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{
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t_isize ret;
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if (file == NULL || buffer == NULL || read_count == NULL || file->ptr == NULL)
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return (ERROR);
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ret = fread(buffer, size, 1, file->ptr);
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if (ret == -1)
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return (ERROR);
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*read_count = ret;
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return (NO_ERROR);
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}
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void close_file(t_file *file)
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{
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struct s_file_slot *slot;
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if (file == NULL)
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return ;
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if (fclose(file->ptr) == -1)
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return ;
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slot = (void*)(file) - offsetof(struct s_file_slot, slot.file);
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mem_set_zero(slot, sizeof(*slot));
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}
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