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/*
* Copyright (c) 2009-2015 Travis Geiselbrecht
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#pragma once
#include <stdbool.h>
#include <sys/types.h>
struct file_stat {
bool is_dir;
uint64_t size;
};
#define FS_MAX_PATH_LEN 256
#define FS_MAX_FILE_LEN 128
typedef struct _filehandle filehandle;
status_t fs_mount(const char *path, const char *fs, const char *device) __NONNULL((1)) __NONNULL((2));
status_t fs_unmount(const char *path) __NONNULL();
/* file api */
status_t fs_create_file(const char *path, filehandle **handle, uint64_t len) __NONNULL();
status_t fs_open_file(const char *path, filehandle **handle) __NONNULL();
ssize_t fs_read_file(filehandle *handle, void *buf, off_t offset, size_t len) __NONNULL();
ssize_t fs_write_file(filehandle *handle, const void *buf, off_t offset, size_t len) __NONNULL();
status_t fs_close_file(filehandle *handle) __NONNULL();
status_t fs_stat_file(filehandle *handle, struct file_stat *) __NONNULL((1));
status_t fs_make_dir(const char *path) __NONNULL();
/* convenience routines */
ssize_t fs_load_file(const char *path, void *ptr, size_t maxlen) __NONNULL();
/* walk through a path string, removing duplicate path seperators, flattening . and .. references */
void fs_normalize_path(char *path) __NONNULL();
/* file system api */
typedef struct _fscookie fscookie;
typedef struct _filecookie filecookie;
struct bdev;
struct fs_api {
status_t (*mount)(struct bdev *, fscookie **);
status_t (*unmount)(fscookie *);
status_t (*open)(fscookie *, const char *, filecookie **);
status_t (*create)(fscookie *, const char *, filecookie **, uint64_t);
status_t (*mkdir)(fscookie *, const char *);
status_t (*stat)(filecookie *, struct file_stat *);
ssize_t (*read)(filecookie *, void *, off_t, size_t);
ssize_t (*write)(filecookie *, const void *, off_t, size_t);
status_t (*close)(filecookie *);
};
/* called by each fs implementation to register a set of hooks */
status_t fs_register_type(const char *name, const struct fs_api *api);
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