upstream/mercurial-mirror Files · rust/hg-cpython/src/utils.rs

rust-node: handling binary Node prefix...

rust-node: handling binary Node prefix Parallel to the inner signatures of the nodetree functions in revlog.c, we'll have to handle prefixes of `Node` in binary form. Another motivation is that it allows to convert from full Node references to `NodePrefixRef` without copy. This is expected to be by far the most common case in practice. There's a slight complication due to the fact that we'll be sometimes interested in prefixes with an odd number of hexadecimal digits, which translates in binary form by a last byte in which only the highest weight 4 bits are considered. This is totally transparent for callers and could be revised once we have proper means to measure performance. The C implementation does the same, passing the length in nybbles as function arguments. Because Rust byte slices already have a length, we carry the even/odd informaton as a boolean, to avoid introducing logical redundancies and the related potential inconsistency bugs. There are a few candidates for inlining here, but we refrain from such premature optimizations, letting the compiler decide. Differential Revision: https://phab.mercurial-scm.org/D7790

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             utils.rs
        
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        Raphaël Gomès
    
rust-utils: introduce a debug util to print the python stack trace...

              r43545
            
      use cpython::{PyDict, PyObject, PyResult, PyTuple, Python};

      #[allow(unused)]

      pub fn print_python_trace(py: Python) -> PyResult<PyObject> {

          eprintln!("===============================");

          eprintln!("Printing Python stack from Rust");

          eprintln!("===============================");

          let traceback = py.import("traceback")?;

          let sys = py.import("sys")?;

          let kwargs = PyDict::new(py);

          kwargs.set_item(py, "file", sys.get(py, "stderr")?)?;

          traceback.call(py, "print_stack", PyTuple::new(py, &[]), Some(&kwargs))

      }

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Raphaël Gomès rust-utils: introduce a debug util to print the python stack trace...	r43545	use cpython::{PyDict, PyObject, PyResult, PyTuple, Python};

		#[allow(unused)]
		pub fn print_python_trace(py: Python) -> PyResult<PyObject> {
		eprintln!("===============================");
		eprintln!("Printing Python stack from Rust");
		eprintln!("===============================");
		let traceback = py.import("traceback")?;
		let sys = py.import("sys")?;
		let kwargs = PyDict::new(py);
		kwargs.set_item(py, "file", sys.get(py, "stderr")?)?;
		traceback.call(py, "print_stack", PyTuple::new(py, &[]), Some(&kwargs))
		}