mirror of
https://github.com/koverstreet/bcachefs-tools.git
synced 2025-02-24 00:00:19 +03:00
e0e06d95f8
This is a _very_ preliminary rewrite of the cmd_list tool in rust, which is intended to be a testing ground for a safe interface in Rust to the core btree interface. This adds rust wrappers for: bch_fs: provides bch2_fs_open(), bch2_fs_stop btree_trans: provides bch2_trans_init(), bch2_trans_exit() btree_iter: provides peek, peek_and_restart, advance bch_errcode: implements Display (wraps bch2_err_str()) bpos: implements Ord (wraps bpos_cmp()) bkey_s_c: implements Display (wraps bch2_bkey_val_to_text()) and other assorted types. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
41 lines
1.0 KiB
Rust
41 lines
1.0 KiB
Rust
use crate::bcachefs;
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use std::ffi::CStr;
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use std::fmt;
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pub use crate::c::bch_errcode;
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impl fmt::Display for bch_errcode {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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let s = unsafe { CStr::from_ptr(bcachefs::bch2_err_str(*self as i32)) };
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write!(f, "{:?}", s)
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}
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}
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/* Can we make a function generic over ptr constness? */
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pub fn errptr_to_result<T>(p: *mut T) -> Result<*mut T, bch_errcode> {
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let addr = p as usize;
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let max_err: isize = -4096;
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if addr > max_err as usize {
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let addr = addr as i32;
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let err: bch_errcode = unsafe { std::mem::transmute(-addr) };
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Err(err)
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} else {
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Ok(p)
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}
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}
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pub fn errptr_to_result_c<T>(p: *const T) -> Result<*const T, bch_errcode> {
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let addr = p as usize;
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let max_err: isize = -4096;
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if addr > max_err as usize {
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let addr = addr as i32;
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let err: bch_errcode = unsafe { std::mem::transmute(-addr) };
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Err(err)
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} else {
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Ok(p)
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}
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}
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impl std::error::Error for bch_errcode {}
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