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| 1 | +use crate::{ |
| 2 | + builtins::{PyBytes, PyBytesRef, PyStrRef}, |
| 3 | + convert::{IntoPyException, ToPyObject}, |
| 4 | + function::PyStr, |
| 5 | + protocol::PyBuffer, |
| 6 | + PyObjectRef, PyResult, TryFromObject, VirtualMachine, |
| 7 | +}; |
| 8 | +use std::{ffi::OsStr, path::PathBuf}; |
| 9 | + |
| 10 | +#[derive(Clone)] |
| 11 | +pub enum FsPath { |
| 12 | + Str(PyStrRef), |
| 13 | + Bytes(PyBytesRef), |
| 14 | +} |
| 15 | + |
| 16 | +impl FsPath { |
| 17 | + // PyOS_FSPath in CPython |
| 18 | + pub fn try_from(obj: PyObjectRef, check_for_nul: bool, vm: &VirtualMachine) -> PyResult<Self> { |
| 19 | + let check_nul = |b: &[u8]| { |
| 20 | + if !check_for_nul || memchr::memchr(b'\0', b).is_none() { |
| 21 | + Ok(()) |
| 22 | + } else { |
| 23 | + Err(crate::exceptions::cstring_error(vm)) |
| 24 | + } |
| 25 | + }; |
| 26 | + let match1 = |obj: PyObjectRef| { |
| 27 | + let pathlike = match_class!(match obj { |
| 28 | + s @ PyStr => { |
| 29 | + check_nul(s.as_str().as_bytes())?; |
| 30 | + FsPath::Str(s) |
| 31 | + } |
| 32 | + b @ PyBytes => { |
| 33 | + check_nul(&b)?; |
| 34 | + FsPath::Bytes(b) |
| 35 | + } |
| 36 | + obj => return Ok(Err(obj)), |
| 37 | + }); |
| 38 | + Ok(Ok(pathlike)) |
| 39 | + }; |
| 40 | + let obj = match match1(obj)? { |
| 41 | + Ok(pathlike) => return Ok(pathlike), |
| 42 | + Err(obj) => obj, |
| 43 | + }; |
| 44 | + let method = |
| 45 | + vm.get_method_or_type_error(obj.clone(), identifier!(vm, __fspath__), || { |
| 46 | + format!( |
| 47 | + "should be string, bytes, os.PathLike or integer, not {}", |
| 48 | + obj.class().name() |
| 49 | + ) |
| 50 | + })?; |
| 51 | + let result = method.call((), vm)?; |
| 52 | + match1(result)?.map_err(|result| { |
| 53 | + vm.new_type_error(format!( |
| 54 | + "expected {}.__fspath__() to return str or bytes, not {}", |
| 55 | + obj.class().name(), |
| 56 | + result.class().name(), |
| 57 | + )) |
| 58 | + }) |
| 59 | + } |
| 60 | + |
| 61 | + pub fn as_os_str(&self, vm: &VirtualMachine) -> PyResult<&OsStr> { |
| 62 | + // TODO: FS encodings |
| 63 | + match self { |
| 64 | + FsPath::Str(s) => Ok(s.as_str().as_ref()), |
| 65 | + FsPath::Bytes(b) => Self::bytes_as_osstr(b.as_bytes(), vm), |
| 66 | + } |
| 67 | + } |
| 68 | + |
| 69 | + pub fn as_bytes(&self) -> &[u8] { |
| 70 | + // TODO: FS encodings |
| 71 | + match self { |
| 72 | + FsPath::Str(s) => s.as_str().as_bytes(), |
| 73 | + FsPath::Bytes(b) => b.as_bytes(), |
| 74 | + } |
| 75 | + } |
| 76 | + |
| 77 | + pub fn as_str(&self) -> &str { |
| 78 | + match self { |
| 79 | + FsPath::Bytes(b) => std::str::from_utf8(b).unwrap(), |
| 80 | + FsPath::Str(s) => s.as_str(), |
| 81 | + } |
| 82 | + } |
| 83 | + |
| 84 | + pub fn to_path_buf(&self, vm: &VirtualMachine) -> PyResult<PathBuf> { |
| 85 | + let path = match self { |
| 86 | + FsPath::Str(s) => PathBuf::from(s.as_str()), |
| 87 | + FsPath::Bytes(b) => PathBuf::from(Self::bytes_as_osstr(b, vm)?), |
| 88 | + }; |
| 89 | + Ok(path) |
| 90 | + } |
| 91 | + |
| 92 | + pub fn to_cstring(&self, vm: &VirtualMachine) -> PyResult<std::ffi::CString> { |
| 93 | + std::ffi::CString::new(self.as_bytes()).map_err(|e| e.into_pyexception(vm)) |
| 94 | + } |
| 95 | + |
| 96 | + #[cfg(windows)] |
| 97 | + pub fn to_widecstring(&self, vm: &VirtualMachine) -> PyResult<widestring::WideCString> { |
| 98 | + widestring::WideCString::from_os_str(self.as_os_str(vm)?) |
| 99 | + .map_err(|err| err.into_pyexception(vm)) |
| 100 | + } |
| 101 | + |
| 102 | + pub fn bytes_as_osstr<'a>(b: &'a [u8], vm: &VirtualMachine) -> PyResult<&'a std::ffi::OsStr> { |
| 103 | + rustpython_common::os::bytes_as_osstr(b) |
| 104 | + .map_err(|_| vm.new_unicode_decode_error("can't decode path for utf-8".to_owned())) |
| 105 | + } |
| 106 | +} |
| 107 | + |
| 108 | +impl ToPyObject for FsPath { |
| 109 | + fn to_pyobject(self, _vm: &VirtualMachine) -> PyObjectRef { |
| 110 | + match self { |
| 111 | + Self::Str(s) => s.into(), |
| 112 | + Self::Bytes(b) => b.into(), |
| 113 | + } |
| 114 | + } |
| 115 | +} |
| 116 | + |
| 117 | +impl TryFromObject for FsPath { |
| 118 | + // PyUnicode_FSDecoder in CPython |
| 119 | + fn try_from_object(vm: &VirtualMachine, obj: PyObjectRef) -> PyResult<Self> { |
| 120 | + let obj = match obj.try_to_value::<PyBuffer>(vm) { |
| 121 | + Ok(buffer) => { |
| 122 | + let mut bytes = vec![]; |
| 123 | + buffer.append_to(&mut bytes); |
| 124 | + vm.ctx.new_bytes(bytes).into() |
| 125 | + } |
| 126 | + Err(_) => obj, |
| 127 | + }; |
| 128 | + Self::try_from(obj, true, vm) |
| 129 | + } |
| 130 | +} |
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