Mercurial > hg
view rust/hg-cpython/src/parsers.rs @ 43424:0836efe4967b
rust-cpython: add generation counter to leaked reference
This counter increments on borrow_mut() to invalidate existing leaked
references. This is modeled after the iterator invalidation in Python.
The other checks will be adjusted by the subsequent patches.
author | Yuya Nishihara <yuya@tcha.org> |
---|---|
date | Sat, 05 Oct 2019 08:27:57 -0400 |
parents | 1ca3823aeefd |
children | ce088b38f92b |
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// parsers.rs // // Copyright 2019 Raphaël Gomès <rgomes@octobus.net> // // This software may be used and distributed according to the terms of the // GNU General Public License version 2 or any later version. //! Bindings for the `hg::dirstate::parsers` module provided by the //! `hg-core` package. //! //! From Python, this will be seen as `mercurial.rustext.parsers` //! use cpython::{ exc, PyBytes, PyDict, PyErr, PyInt, PyModule, PyResult, PyTuple, Python, PythonObject, ToPyObject, }; use hg::{ pack_dirstate, parse_dirstate, utils::hg_path::HgPathBuf, DirstatePackError, DirstateParents, DirstateParseError, PARENT_SIZE, }; use std::collections::HashMap; use std::convert::TryInto; use crate::dirstate::{extract_dirstate, make_dirstate_tuple}; use std::time::Duration; fn parse_dirstate_wrapper( py: Python, dmap: PyDict, copymap: PyDict, st: PyBytes, ) -> PyResult<PyTuple> { let mut dirstate_map = HashMap::new(); let mut copies = HashMap::new(); match parse_dirstate(&mut dirstate_map, &mut copies, st.data(py)) { Ok(parents) => { for (filename, entry) in &dirstate_map { dmap.set_item( py, PyBytes::new(py, filename.as_ref()), make_dirstate_tuple(py, entry)?, )?; } for (path, copy_path) in copies { copymap.set_item( py, PyBytes::new(py, path.as_ref()), PyBytes::new(py, copy_path.as_ref()), )?; } Ok( (PyBytes::new(py, &parents.p1), PyBytes::new(py, &parents.p2)) .to_py_object(py), ) } Err(e) => Err(PyErr::new::<exc::ValueError, _>( py, match e { DirstateParseError::TooLittleData => { "too little data for parents".to_string() } DirstateParseError::Overflow => { "overflow in dirstate".to_string() } DirstateParseError::CorruptedEntry(e) => e, DirstateParseError::Damaged => { "dirstate appears to be damaged".to_string() } }, )), } } fn pack_dirstate_wrapper( py: Python, dmap: PyDict, copymap: PyDict, pl: PyTuple, now: PyInt, ) -> PyResult<PyBytes> { let p1 = pl.get_item(py, 0).extract::<PyBytes>(py)?; let p1: &[u8] = p1.data(py); let p2 = pl.get_item(py, 1).extract::<PyBytes>(py)?; let p2: &[u8] = p2.data(py); let mut dirstate_map = extract_dirstate(py, &dmap)?; let copies: Result<HashMap<HgPathBuf, HgPathBuf>, PyErr> = copymap .items(py) .iter() .map(|(key, value)| { Ok(( HgPathBuf::from_bytes(key.extract::<PyBytes>(py)?.data(py)), HgPathBuf::from_bytes(value.extract::<PyBytes>(py)?.data(py)), )) }) .collect(); if p1.len() != PARENT_SIZE || p2.len() != PARENT_SIZE { return Err(PyErr::new::<exc::ValueError, _>( py, "expected a 20-byte hash".to_string(), )); } match pack_dirstate( &mut dirstate_map, &copies?, DirstateParents { p1: p1.try_into().unwrap(), p2: p2.try_into().unwrap(), }, Duration::from_secs(now.as_object().extract::<u64>(py)?), ) { Ok(packed) => { for (filename, entry) in &dirstate_map { dmap.set_item( py, PyBytes::new(py, filename.as_ref()), make_dirstate_tuple(py, entry)?, )?; } Ok(PyBytes::new(py, &packed)) } Err(error) => Err(PyErr::new::<exc::ValueError, _>( py, match error { DirstatePackError::CorruptedParent => { "expected a 20-byte hash".to_string() } DirstatePackError::CorruptedEntry(e) => e, DirstatePackError::BadSize(expected, actual) => { format!("bad dirstate size: {} != {}", actual, expected) } }, )), } } /// Create the module, with `__package__` given from parent pub fn init_parsers_module(py: Python, package: &str) -> PyResult<PyModule> { let dotted_name = &format!("{}.parsers", package); let m = PyModule::new(py, dotted_name)?; m.add(py, "__package__", package)?; m.add(py, "__doc__", "Parsers - Rust implementation")?; m.add( py, "parse_dirstate", py_fn!( py, parse_dirstate_wrapper(dmap: PyDict, copymap: PyDict, st: PyBytes) ), )?; m.add( py, "pack_dirstate", py_fn!( py, pack_dirstate_wrapper( dmap: PyDict, copymap: PyDict, pl: PyTuple, now: PyInt ) ), )?; let sys = PyModule::import(py, "sys")?; let sys_modules: PyDict = sys.get(py, "modules")?.extract(py)?; sys_modules.set_item(py, dotted_name, &m)?; Ok(m) }