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FsPath public API #3141

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Merged
merged 1 commit into from
Sep 29, 2021
Merged

FsPath public API #3141

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2 changes: 1 addition & 1 deletion vm/src/stdlib/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -46,7 +46,7 @@ mod zlib;

#[cfg(any(not(target_arch = "wasm32"), target_os = "wasi"))]
#[macro_use]
pub(crate) mod os;
pub mod os;
#[cfg(windows)]
pub(crate) mod nt;
#[cfg(unix)]
Expand Down
97 changes: 46 additions & 51 deletions vm/src/stdlib/os.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -106,6 +106,49 @@ pub enum FsPath {
}

impl FsPath {
pub fn try_from(obj: PyObjectRef, check_for_nul: bool, vm: &VirtualMachine) -> PyResult<Self> {
// PyOS_FSPath in CPython
let check_nul = |b: &[u8]| {
if !check_for_nul || memchr::memchr(b'\0', b).is_none() {
Ok(())
} else {
Err(crate::exceptions::cstring_error(vm))
}
};
let match1 = |obj: PyObjectRef| {
let pathlike = match_class!(match obj {
s @ PyStr => {
check_nul(s.as_str().as_bytes())?;
FsPath::Str(s)
}
b @ PyBytes => {
check_nul(&b)?;
FsPath::Bytes(b)
}
obj => return Ok(Err(obj)),
});
Ok(Ok(pathlike))
};
let obj = match match1(obj)? {
Ok(pathlike) => return Ok(pathlike),
Err(obj) => obj,
};
let method = vm.get_method_or_type_error(obj.clone(), "__fspath__", || {
format!(
"expected str, bytes or os.PathLike object, not {}",
obj.class().name()
)
})?;
let result = vm.invoke(&method, ())?;
match1(result)?.map_err(|result| {
vm.new_type_error(format!(
"expected {}.__fspath__() to return str or bytes, not {}",
obj.class().name(),
result.class().name(),
))
})
}

pub fn as_os_str(&self, vm: &VirtualMachine) -> PyResult<&ffi::OsStr> {
// TODO: FS encodings
match self {
Expand All @@ -123,8 +166,7 @@ impl FsPath {
Ok(PyPathLike { path, mode })
}

#[cfg(not(target_os = "redox"))]
pub(crate) fn as_bytes(&self) -> &[u8] {
pub fn as_bytes(&self) -> &[u8] {
// TODO: FS encodings
match self {
FsPath::Str(s) => s.as_str().as_bytes(),
Expand All @@ -142,61 +184,14 @@ impl IntoPyObject for FsPath {
}
}

pub(crate) fn fspath(
obj: PyObjectRef,
check_for_nul: bool,
vm: &VirtualMachine,
) -> PyResult<FsPath> {
// PyOS_FSPath in CPython
let check_nul = |b: &[u8]| {
if !check_for_nul || memchr::memchr(b'\0', b).is_none() {
Ok(())
} else {
Err(crate::exceptions::cstring_error(vm))
}
};
let match1 = |obj: PyObjectRef| {
let pathlike = match_class!(match obj {
s @ PyStr => {
check_nul(s.as_str().as_bytes())?;
FsPath::Str(s)
}
b @ PyBytes => {
check_nul(&b)?;
FsPath::Bytes(b)
}
obj => return Ok(Err(obj)),
});
Ok(Ok(pathlike))
};
let obj = match match1(obj)? {
Ok(pathlike) => return Ok(pathlike),
Err(obj) => obj,
};
let method = vm.get_method_or_type_error(obj.clone(), "__fspath__", || {
format!(
"expected str, bytes or os.PathLike object, not {}",
obj.class().name()
)
})?;
let result = vm.invoke(&method, ())?;
match1(result)?.map_err(|result| {
vm.new_type_error(format!(
"expected {}.__fspath__() to return str or bytes, not {}",
obj.class().name(),
result.class().name(),
))
})
}

impl TryFromObject for PyPathLike {
fn try_from_object(vm: &VirtualMachine, obj: PyObjectRef) -> PyResult<Self> {
// path_converter in CPython
let obj = match PyBuffer::try_from_borrowed_object(vm, &obj) {
Ok(buffer) => PyBytes::from(buffer.internal.obj_bytes().to_vec()).into_pyobject(vm),
Err(_) => obj,
};
let fs_path = fspath(obj, true, vm)?;
let fs_path = FsPath::try_from(obj, true, vm)?;
fs_path.to_pathlike(vm)
}
}
Expand Down Expand Up @@ -1164,7 +1159,7 @@ pub(super) mod _os {

#[pyfunction]
fn fspath(path: PyObjectRef, vm: &VirtualMachine) -> PyResult<FsPath> {
super::fspath(path, false, vm)
super::FsPath::try_from(path, false, vm)
}

#[pyfunction]
Expand Down
2 changes: 1 addition & 1 deletion vm/src/stdlib/socket.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1413,7 +1413,7 @@ type IfIndex = winapi::shared::ifdef::NET_IFINDEX;

#[cfg(not(target_os = "redox"))]
fn _socket_if_nametoindex(name: PyObjectRef, vm: &VirtualMachine) -> PyResult<IfIndex> {
let name = super::os::fspath(name, true, vm)?;
let name = super::os::FsPath::try_from(name, true, vm)?;
let name = ffi::CString::new(name.as_bytes()).map_err(|err| err.into_pyexception(vm))?;

let ret = unsafe { c::if_nametoindex(name.as_ptr()) };
Expand Down