littlefs-rust-core 0.1.0

Port of LittleFS to unsafe rust
Documentation 
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//! Block device config. Per lfs.h struct lfs_config.
//! Callbacks use raw function pointers for C-compatible layout.

#![allow(non_camel_case_types)]

use crate::types::{lfs_block_t, lfs_off_t, lfs_size_t};

/// Read callback: (cfg, block, off, buffer, size) -> 0 or negative error
pub type lfs_read_t =
    unsafe extern "C" fn(*const LfsConfig, lfs_block_t, lfs_off_t, *mut u8, lfs_size_t) -> i32;

/// Prog callback: (cfg, block, off, buffer, size) -> 0 or negative error
pub type lfs_prog_t =
    unsafe extern "C" fn(*const LfsConfig, lfs_block_t, lfs_off_t, *const u8, lfs_size_t) -> i32;

/// Erase callback: (cfg, block) -> 0 or negative error
pub type lfs_erase_t = unsafe extern "C" fn(*const LfsConfig, lfs_block_t) -> i32;

/// Sync callback: (cfg) -> 0 or negative error
pub type lfs_sync_t = unsafe extern "C" fn(*const LfsConfig) -> i32;

/// Per lfs.h struct lfs_config.
/// Layout matches C for potential FFI. Callbacks use Option to allow null.
#[repr(C)]
pub struct LfsConfig {
    pub context: *mut core::ffi::c_void,
    pub read: Option<lfs_read_t>,
    pub prog: Option<lfs_prog_t>,
    pub erase: Option<lfs_erase_t>,
    pub sync: Option<lfs_sync_t>,
    pub read_size: lfs_size_t,
    pub prog_size: lfs_size_t,
    pub block_size: lfs_size_t,
    pub block_count: lfs_size_t,
    pub block_cycles: i32,
    pub cache_size: lfs_size_t,
    pub lookahead_size: lfs_size_t,
    pub compact_thresh: lfs_size_t,
    pub read_buffer: *mut core::ffi::c_void,
    pub prog_buffer: *mut core::ffi::c_void,
    pub lookahead_buffer: *mut core::ffi::c_void,
    pub name_max: lfs_size_t,
    pub file_max: lfs_size_t,
    pub attr_max: lfs_size_t,
    pub metadata_max: lfs_size_t,
    pub inline_max: lfs_size_t,
}