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Copy pathstr.rs
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2673 lines (2383 loc) · 78.5 KB
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use super::{
PositionIterInternal, PyBytesRef, PyDict, PyTupleRef, PyType, PyTypeRef,
int::{PyInt, PyIntRef},
iter::{
IterStatus::{self, Exhausted},
builtins_iter,
},
};
use crate::common::lock::LazyLock;
use crate::{
AsObject, Context, Py, PyExact, PyObject, PyObjectRef, PyPayload, PyRef, PyRefExact, PyResult,
TryFromBorrowedObject, VirtualMachine,
anystr::{self, AnyStr, AnyStrContainer, AnyStrWrapper, adjust_indices},
atomic_func,
cformat::cformat_string,
class::PyClassImpl,
common::str::{PyKindStr, StrData, StrKind},
convert::{IntoPyException, ToPyException, ToPyObject, ToPyResult},
format::{format, format_map},
function::{ArgIterable, ArgSize, FuncArgs, OptionalArg, OptionalOption, PyComparisonValue},
intern::PyInterned,
object::{MaybeTraverse, Traverse, TraverseFn},
protocol::{PyIterReturn, PyMappingMethods, PyNumberMethods, PySequenceMethods},
sequence::SequenceExt,
sliceable::{SequenceIndex, SliceableSequenceOp},
types::{
AsMapping, AsNumber, AsSequence, Comparable, Constructor, Hashable, IterNext, Iterable,
PyComparisonOp, Representable, SelfIter,
},
};
use alloc::{borrow::Cow, fmt};
use ascii::{AsciiChar, AsciiStr, AsciiString};
use bstr::ByteSlice;
use core::{char, mem, ops::Range};
use itertools::Itertools;
use num_traits::ToPrimitive;
use rustpython_common::{
ascii,
atomic::{self, PyAtomic, Radium},
format::{FormatSpec, FormatString, FromTemplate},
hash,
lock::PyMutex,
str::DeduceStrKind,
wtf8::{CodePoint, Wtf8, Wtf8Buf, Wtf8Chunk, Wtf8Concat},
};
use unic_ucd_bidi::BidiClass;
use unic_ucd_category::GeneralCategory;
use unic_ucd_ident::{is_xid_continue, is_xid_start};
use unicode_casing::CharExt;
impl<'a> TryFromBorrowedObject<'a> for String {
fn try_from_borrowed_object(vm: &VirtualMachine, obj: &'a PyObject) -> PyResult<Self> {
obj.try_value_with(|pystr: &PyUtf8Str| Ok(pystr.as_str().to_owned()), vm)
}
}
impl<'a> TryFromBorrowedObject<'a> for &'a str {
fn try_from_borrowed_object(vm: &VirtualMachine, obj: &'a PyObject) -> PyResult<Self> {
let pystr: &Py<PyUtf8Str> = TryFromBorrowedObject::try_from_borrowed_object(vm, obj)?;
Ok(pystr.as_str())
}
}
impl<'a> TryFromBorrowedObject<'a> for &'a Wtf8 {
fn try_from_borrowed_object(vm: &VirtualMachine, obj: &'a PyObject) -> PyResult<Self> {
let pystr: &Py<PyStr> = TryFromBorrowedObject::try_from_borrowed_object(vm, obj)?;
Ok(pystr.as_wtf8())
}
}
pub type PyStrRef = PyRef<PyStr>;
pub type PyUtf8StrRef = PyRef<PyUtf8Str>;
#[pyclass(module = false, name = "str")]
pub struct PyStr {
data: StrData,
hash: PyAtomic<hash::PyHash>,
}
impl fmt::Debug for PyStr {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("PyStr")
.field("value", &self.as_wtf8())
.field("kind", &self.data.kind())
.field("hash", &self.hash)
.finish()
}
}
impl AsRef<str> for PyStr {
#[track_caller] // <- can remove this once it doesn't panic
fn as_ref(&self) -> &str {
self.to_str().expect("str has surrogates")
}
}
impl AsRef<str> for Py<PyStr> {
#[track_caller] // <- can remove this once it doesn't panic
fn as_ref(&self) -> &str {
self.to_str().expect("str has surrogates")
}
}
impl AsRef<str> for PyStrRef {
#[track_caller] // <- can remove this once it doesn't panic
fn as_ref(&self) -> &str {
self.to_str().expect("str has surrogates")
}
}
impl AsRef<Wtf8> for PyStr {
fn as_ref(&self) -> &Wtf8 {
self.as_wtf8()
}
}
impl AsRef<Wtf8> for Py<PyStr> {
fn as_ref(&self) -> &Wtf8 {
self.as_wtf8()
}
}
impl AsRef<Wtf8> for PyStrRef {
fn as_ref(&self) -> &Wtf8 {
self.as_wtf8()
}
}
impl Wtf8Concat for PyStr {
#[inline]
fn fmt_wtf8(&self, buf: &mut Wtf8Buf) {
buf.push_wtf8(self.as_wtf8());
}
}
impl Wtf8Concat for Py<PyStr> {
#[inline]
fn fmt_wtf8(&self, buf: &mut Wtf8Buf) {
buf.push_wtf8(self.as_wtf8());
}
}
impl<'a> From<&'a AsciiStr> for PyStr {
fn from(s: &'a AsciiStr) -> Self {
s.to_owned().into()
}
}
impl From<AsciiString> for PyStr {
fn from(s: AsciiString) -> Self {
s.into_boxed_ascii_str().into()
}
}
impl From<Box<AsciiStr>> for PyStr {
fn from(s: Box<AsciiStr>) -> Self {
StrData::from(s).into()
}
}
impl From<AsciiChar> for PyStr {
fn from(ch: AsciiChar) -> Self {
AsciiString::from(ch).into()
}
}
impl<'a> From<&'a str> for PyStr {
fn from(s: &'a str) -> Self {
s.to_owned().into()
}
}
impl<'a> From<&'a Wtf8> for PyStr {
fn from(s: &'a Wtf8) -> Self {
s.to_owned().into()
}
}
impl From<String> for PyStr {
fn from(s: String) -> Self {
s.into_boxed_str().into()
}
}
impl From<Wtf8Buf> for PyStr {
fn from(w: Wtf8Buf) -> Self {
w.into_box().into()
}
}
impl From<char> for PyStr {
fn from(ch: char) -> Self {
StrData::from(ch).into()
}
}
impl From<CodePoint> for PyStr {
fn from(ch: CodePoint) -> Self {
StrData::from(ch).into()
}
}
impl From<StrData> for PyStr {
fn from(data: StrData) -> Self {
Self {
data,
hash: Radium::new(hash::SENTINEL),
}
}
}
impl<'a> From<alloc::borrow::Cow<'a, str>> for PyStr {
fn from(s: alloc::borrow::Cow<'a, str>) -> Self {
s.into_owned().into()
}
}
impl From<Box<str>> for PyStr {
#[inline]
fn from(value: Box<str>) -> Self {
StrData::from(value).into()
}
}
impl From<Box<Wtf8>> for PyStr {
#[inline]
fn from(value: Box<Wtf8>) -> Self {
StrData::from(value).into()
}
}
impl Default for PyStr {
fn default() -> Self {
Self {
data: StrData::default(),
hash: Radium::new(hash::SENTINEL),
}
}
}
impl fmt::Display for PyStr {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.as_wtf8().fmt(f)
}
}
pub trait AsPyStr<'a>
where
Self: 'a,
{
#[allow(
clippy::wrong_self_convention,
reason = "this trait is intentionally implemented for references"
)]
fn as_pystr(self, ctx: &Context) -> &'a Py<PyStr>;
}
impl<'a> AsPyStr<'a> for &'a Py<PyStr> {
#[inline]
fn as_pystr(self, _ctx: &Context) -> &'a Py<PyStr> {
self
}
}
impl<'a> AsPyStr<'a> for &'a Py<PyUtf8Str> {
#[inline]
fn as_pystr(self, _ctx: &Context) -> &'a Py<PyStr> {
Py::<PyUtf8Str>::as_pystr(self)
}
}
impl<'a> AsPyStr<'a> for &'a PyStrRef {
#[inline]
fn as_pystr(self, _ctx: &Context) -> &'a Py<PyStr> {
self
}
}
impl<'a> AsPyStr<'a> for &'a PyUtf8StrRef {
#[inline]
fn as_pystr(self, _ctx: &Context) -> &'a Py<PyStr> {
Py::<PyUtf8Str>::as_pystr(self)
}
}
impl AsPyStr<'static> for &'static str {
#[inline]
fn as_pystr(self, ctx: &Context) -> &'static Py<PyStr> {
ctx.intern_str(self)
}
}
impl<'a> AsPyStr<'a> for &'a PyStrInterned {
#[inline]
fn as_pystr(self, _ctx: &Context) -> &'a Py<PyStr> {
self
}
}
impl<'a> AsPyStr<'a> for &'a PyUtf8StrInterned {
#[inline]
fn as_pystr(self, _ctx: &Context) -> &'a Py<PyStr> {
Py::<PyUtf8Str>::as_pystr(self)
}
}
#[pyclass(module = false, name = "str_iterator", traverse = "manual")]
#[derive(Debug)]
pub struct PyStrIterator {
internal: PyMutex<(PositionIterInternal<PyStrRef>, usize)>,
}
unsafe impl Traverse for PyStrIterator {
fn traverse(&self, tracer: &mut TraverseFn<'_>) {
// No need to worry about deadlock, for inner is a PyStr and can't make ref cycle
self.internal.lock().0.traverse(tracer);
}
}
impl PyPayload for PyStrIterator {
fn class(ctx: &Context) -> &'static Py<PyType> {
ctx.types.str_iterator_type
}
}
#[pyclass(flags(DISALLOW_INSTANTIATION), with(IterNext, Iterable))]
impl PyStrIterator {
#[pymethod]
fn __length_hint__(&self) -> usize {
self.internal.lock().0.length_hint(|obj| obj.char_len())
}
#[pymethod]
fn __setstate__(&self, state: PyObjectRef, vm: &VirtualMachine) -> PyResult<()> {
let mut internal = self.internal.lock();
internal.1 = usize::MAX;
internal
.0
.set_state(state, |obj, pos| pos.min(obj.char_len()), vm)
}
#[pymethod]
fn __reduce__(&self, vm: &VirtualMachine) -> PyTupleRef {
let func = builtins_iter(vm);
self.internal.lock().0.reduce(
func,
|x| x.clone().into(),
|vm| vm.ctx.empty_str.to_owned().into(),
vm,
)
}
}
impl SelfIter for PyStrIterator {}
impl IterNext for PyStrIterator {
fn next(zelf: &Py<Self>, vm: &VirtualMachine) -> PyResult<PyIterReturn> {
let mut internal = zelf.internal.lock();
if let IterStatus::Active(s) = &internal.0.status {
let value = s.as_wtf8();
if internal.1 == usize::MAX {
if let Some((offset, ch)) = value.code_point_indices().nth(internal.0.position) {
internal.0.position += 1;
internal.1 = offset + ch.len_wtf8();
return Ok(PyIterReturn::Return(ch.to_pyobject(vm)));
}
} else if let Some(value) = value.get(internal.1..)
&& let Some(ch) = value.code_points().next()
{
internal.0.position += 1;
internal.1 += ch.len_wtf8();
return Ok(PyIterReturn::Return(ch.to_pyobject(vm)));
}
internal.0.status = Exhausted;
}
Ok(PyIterReturn::StopIteration(None))
}
}
#[derive(FromArgs)]
pub struct StrArgs {
#[pyarg(any, optional)]
object: OptionalArg<PyObjectRef>,
#[pyarg(any, optional)]
encoding: OptionalArg<PyUtf8StrRef>,
#[pyarg(any, optional)]
errors: OptionalArg<PyUtf8StrRef>,
}
impl Constructor for PyStr {
type Args = StrArgs;
fn slot_new(cls: PyTypeRef, func_args: FuncArgs, vm: &VirtualMachine) -> PyResult {
// Optimization: return exact str as-is (only when no encoding/errors provided)
if cls.is(vm.ctx.types.str_type)
&& func_args.args.len() == 1
&& func_args.kwargs.is_empty()
&& func_args.args[0].class().is(vm.ctx.types.str_type)
{
return Ok(func_args.args[0].clone());
}
let args: Self::Args = func_args.bind(vm)?;
let payload = Self::py_new(&cls, args, vm)?;
payload.into_ref_with_type(vm, cls).map(Into::into)
}
fn py_new(_cls: &Py<PyType>, args: Self::Args, vm: &VirtualMachine) -> PyResult<Self> {
match args.object {
OptionalArg::Present(input) => {
if let OptionalArg::Present(enc) = args.encoding {
let s = vm.state.codec_registry.decode_text(
input,
enc.as_str(),
args.errors.into_option(),
vm,
)?;
Ok(Self::from(s.as_wtf8().to_owned()))
} else {
let s = input.str(vm)?;
Ok(Self::from(s.as_wtf8().to_owned()))
}
}
OptionalArg::Missing => Ok(Self::from(String::new())),
}
}
}
impl PyStr {
/// # Safety: Given `bytes` must be valid data for given `kind`
unsafe fn new_str_unchecked(data: Box<Wtf8>, kind: StrKind) -> Self {
unsafe { StrData::new_str_unchecked(data, kind) }.into()
}
unsafe fn new_with_char_len<T: DeduceStrKind + Into<Box<Wtf8>>>(s: T, char_len: usize) -> Self {
let kind = s.str_kind();
unsafe { StrData::new_with_char_len(s.into(), kind, char_len) }.into()
}
/// # Safety
/// Given `bytes` must be ascii
pub unsafe fn new_ascii_unchecked(bytes: Vec<u8>) -> Self {
unsafe { AsciiString::from_ascii_unchecked(bytes) }.into()
}
#[deprecated(note = "use PyStr::from(...).into_ref() instead")]
pub fn new_ref(zelf: impl Into<Self>, ctx: &Context) -> PyRef<Self> {
let zelf = zelf.into();
zelf.into_ref(ctx)
}
fn new_substr(&self, s: Wtf8Buf) -> Self {
let kind = if self.kind().is_ascii() || s.is_ascii() {
StrKind::Ascii
} else if self.kind().is_utf8() || s.is_utf8() {
StrKind::Utf8
} else {
StrKind::Wtf8
};
unsafe {
// SAFETY: kind is properly decided for substring
Self::new_str_unchecked(s.into(), kind)
}
}
#[inline]
pub const fn as_wtf8(&self) -> &Wtf8 {
self.data.as_wtf8()
}
pub const fn as_bytes(&self) -> &[u8] {
self.data.as_wtf8().as_bytes()
}
pub fn to_str(&self) -> Option<&str> {
self.data.as_str()
}
/// Returns `&str`
///
/// # Panic
/// If the string contains surrogates.
#[inline]
#[track_caller]
pub fn expect_str(&self) -> &str {
self.to_str().expect("PyStr contains surrogates")
}
pub(crate) fn ensure_valid_utf8(&self, vm: &VirtualMachine) -> PyResult<()> {
if self.is_utf8() {
Ok(())
} else {
let start = self
.as_wtf8()
.code_points()
.position(|c| c.to_char().is_none())
.unwrap();
Err(vm.new_unicode_encode_error_real(
identifier!(vm, utf_8).to_owned(),
vm.ctx.new_str(self.data.clone()),
start,
start + 1,
vm.ctx.new_str("surrogates not allowed"),
))
}
}
pub fn to_string_lossy(&self) -> Cow<'_, str> {
self.to_str()
.map(Cow::Borrowed)
.unwrap_or_else(|| self.as_wtf8().to_string_lossy())
}
pub const fn kind(&self) -> StrKind {
self.data.kind()
}
#[inline]
pub fn as_str_kind(&self) -> PyKindStr<'_> {
self.data.as_str_kind()
}
pub const fn is_utf8(&self) -> bool {
self.kind().is_utf8()
}
fn char_all<F>(&self, test: F) -> bool
where
F: Fn(char) -> bool,
{
match self.as_str_kind() {
PyKindStr::Ascii(s) => s.chars().all(|ch| test(ch.into())),
PyKindStr::Utf8(s) => s.chars().all(test),
PyKindStr::Wtf8(w) => w.code_points().all(|ch| ch.is_char_and(&test)),
}
}
fn repeat(zelf: PyRef<Self>, value: isize, vm: &VirtualMachine) -> PyResult<PyRef<Self>> {
if value == 0 && zelf.class().is(vm.ctx.types.str_type) {
// Special case: when some `str` is multiplied by `0`,
// returns the empty `str`.
return Ok(vm.ctx.empty_str.to_owned());
}
if (value == 1 || zelf.is_empty()) && zelf.class().is(vm.ctx.types.str_type) {
// Special case: when some `str` is multiplied by `1` or is the empty `str`,
// nothing really happens, we need to return an object itself
// with the same `id()` to be compatible with CPython.
// This only works for `str` itself, not its subclasses.
return Ok(zelf);
}
zelf.as_wtf8()
.as_bytes()
.mul(vm, value)
.map(|x| Self::from(unsafe { Wtf8Buf::from_bytes_unchecked(x) }).into_ref(&vm.ctx))
}
pub fn try_as_utf8<'a>(&'a self, vm: &VirtualMachine) -> PyResult<&'a PyUtf8Str> {
// Check if the string contains surrogates
self.ensure_valid_utf8(vm)?;
// If no surrogates, we can safely cast to PyStr
Ok(unsafe { &*(self as *const _ as *const PyUtf8Str) })
}
}
impl Py<PyStr> {
pub fn try_as_utf8<'a>(&'a self, vm: &VirtualMachine) -> PyResult<&'a Py<PyUtf8Str>> {
// Check if the string contains surrogates
self.ensure_valid_utf8(vm)?;
// If no surrogates, we can safely cast to PyStr
Ok(unsafe { &*(self as *const _ as *const Py<PyUtf8Str>) })
}
}
#[pyclass(
flags(BASETYPE, _MATCH_SELF),
with(
AsMapping,
AsNumber,
AsSequence,
Representable,
Hashable,
Comparable,
Iterable,
Constructor
)
)]
impl PyStr {
fn __add__(zelf: PyRef<Self>, other: PyObjectRef, vm: &VirtualMachine) -> PyResult {
if let Some(other) = other.downcast_ref::<Self>() {
let bytes = zelf.as_wtf8().py_add(other.as_wtf8());
Ok(unsafe {
// SAFETY: `kind` is safely decided
let kind = zelf.kind() | other.kind();
Self::new_str_unchecked(bytes.into(), kind)
}
.to_pyobject(vm))
} else if let Some(radd) = vm.get_method(other.clone(), identifier!(vm, __radd__)) {
// hack to get around not distinguishing number add from seq concat
radd?.call((zelf,), vm)
} else {
Err(vm.new_type_error(format!(
r#"can only concatenate str (not "{}") to str"#,
other.class().name()
)))
}
}
fn _contains(&self, needle: &PyObject, vm: &VirtualMachine) -> PyResult<bool> {
if let Some(needle) = needle.downcast_ref::<Self>() {
Ok(memchr::memmem::find(self.as_bytes(), needle.as_bytes()).is_some())
} else {
Err(vm.new_type_error(format!(
"'in <string>' requires string as left operand, not {}",
needle.class().name()
)))
}
}
fn __contains__(&self, needle: PyObjectRef, vm: &VirtualMachine) -> PyResult<bool> {
self._contains(&needle, vm)
}
fn _getitem(&self, needle: &PyObject, vm: &VirtualMachine) -> PyResult {
let item = match SequenceIndex::try_from_borrowed_object(vm, needle, "str")? {
SequenceIndex::Int(i) => self.getitem_by_index(vm, i)?.to_pyobject(vm),
SequenceIndex::Slice(slice) => self.getitem_by_slice(vm, slice)?.to_pyobject(vm),
};
Ok(item)
}
fn __getitem__(&self, needle: PyObjectRef, vm: &VirtualMachine) -> PyResult {
self._getitem(&needle, vm)
}
#[inline]
pub(crate) fn hash(&self, vm: &VirtualMachine) -> hash::PyHash {
match self.hash.load(atomic::Ordering::Relaxed) {
hash::SENTINEL => self._compute_hash(vm),
hash => hash,
}
}
#[cold]
fn _compute_hash(&self, vm: &VirtualMachine) -> hash::PyHash {
let hash_val = vm.state.hash_secret.hash_bytes(self.as_bytes());
debug_assert_ne!(hash_val, hash::SENTINEL);
// spell-checker:ignore cmpxchg
// like with char_len, we don't need a cmpxchg loop, since it'll always be the same value
self.hash.store(hash_val, atomic::Ordering::Relaxed);
hash_val
}
#[inline]
pub fn byte_len(&self) -> usize {
self.data.len()
}
#[inline]
pub fn is_empty(&self) -> bool {
self.data.is_empty()
}
#[pymethod(name = "__len__")]
#[inline]
pub fn char_len(&self) -> usize {
self.data.char_len()
}
#[pymethod]
#[inline(always)]
pub const fn isascii(&self) -> bool {
matches!(self.kind(), StrKind::Ascii)
}
#[pymethod]
fn __sizeof__(&self) -> usize {
core::mem::size_of::<Self>() + self.byte_len() * core::mem::size_of::<u8>()
}
fn __mul__(zelf: PyRef<Self>, value: ArgSize, vm: &VirtualMachine) -> PyResult<PyRef<Self>> {
Self::repeat(zelf, value.into(), vm)
}
#[inline]
pub(crate) fn repr(&self, vm: &VirtualMachine) -> PyResult<String> {
use crate::literal::escape::UnicodeEscape;
UnicodeEscape::new_repr(self.as_wtf8())
.str_repr()
.to_string()
.ok_or_else(|| vm.new_overflow_error("string is too long to generate repr"))
}
#[pymethod]
fn lower(&self) -> Self {
match self.as_str_kind() {
PyKindStr::Ascii(s) => s.to_ascii_lowercase().into(),
PyKindStr::Utf8(s) => s.to_lowercase().into(),
PyKindStr::Wtf8(w) => w.to_lowercase().into(),
}
}
// casefold is much more aggressive than lower
#[pymethod]
fn casefold(&self) -> Self {
match self.as_str_kind() {
PyKindStr::Ascii(s) => caseless::default_case_fold_str(s.as_str()).into(),
PyKindStr::Utf8(s) => caseless::default_case_fold_str(s).into(),
PyKindStr::Wtf8(w) => w
.chunks()
.map(|c| match c {
Wtf8Chunk::Utf8(s) => Wtf8Buf::from_string(caseless::default_case_fold_str(s)),
Wtf8Chunk::Surrogate(c) => Wtf8Buf::from(c),
})
.collect::<Wtf8Buf>()
.into(),
}
}
#[pymethod]
fn upper(&self) -> Self {
match self.as_str_kind() {
PyKindStr::Ascii(s) => s.to_ascii_uppercase().into(),
PyKindStr::Utf8(s) => s.to_uppercase().into(),
PyKindStr::Wtf8(w) => w.to_uppercase().into(),
}
}
#[pymethod]
fn capitalize(&self) -> Wtf8Buf {
match self.as_str_kind() {
PyKindStr::Ascii(s) => {
let mut s = s.to_owned();
if let [first, rest @ ..] = s.as_mut_slice() {
first.make_ascii_uppercase();
ascii::AsciiStr::make_ascii_lowercase(rest.into());
}
s.into()
}
PyKindStr::Utf8(s) => {
let mut chars = s.chars();
let mut out = String::with_capacity(s.len());
if let Some(c) = chars.next() {
out.extend(c.to_titlecase());
out.push_str(&chars.as_str().to_lowercase());
}
out.into()
}
PyKindStr::Wtf8(s) => {
let mut out = Wtf8Buf::with_capacity(s.len());
let mut chars = s.code_points();
if let Some(ch) = chars.next() {
match ch.to_char() {
Some(ch) => out.extend(ch.to_titlecase()),
None => out.push(ch),
}
out.push_wtf8(&chars.as_wtf8().to_lowercase());
}
out
}
}
}
#[pymethod]
fn split(zelf: &Py<Self>, args: SplitArgs, vm: &VirtualMachine) -> PyResult<Vec<PyObjectRef>> {
let elements = match zelf.as_str_kind() {
PyKindStr::Ascii(s) => s.py_split(
args,
vm,
|| zelf.as_object().to_owned(),
|v, s, vm| {
v.as_bytes()
.split_str(s)
.map(|s| unsafe { AsciiStr::from_ascii_unchecked(s) }.to_pyobject(vm))
.collect()
},
|v, s, n, vm| {
v.as_bytes()
.splitn_str(n, s)
.map(|s| unsafe { AsciiStr::from_ascii_unchecked(s) }.to_pyobject(vm))
.collect()
},
|v, n, vm| {
v.as_bytes().py_split_whitespace(n, |s| {
unsafe { AsciiStr::from_ascii_unchecked(s) }.to_pyobject(vm)
})
},
),
PyKindStr::Utf8(s) => s.py_split(
args,
vm,
|| zelf.as_object().to_owned(),
|v, s, vm| v.split(s).map(|s| vm.ctx.new_str(s).into()).collect(),
|v, s, n, vm| v.splitn(n, s).map(|s| vm.ctx.new_str(s).into()).collect(),
|v, n, vm| v.py_split_whitespace(n, |s| vm.ctx.new_str(s).into()),
),
PyKindStr::Wtf8(w) => w.py_split(
args,
vm,
|| zelf.as_object().to_owned(),
|v, s, vm| v.split(s).map(|s| vm.ctx.new_str(s).into()).collect(),
|v, s, n, vm| v.splitn(n, s).map(|s| vm.ctx.new_str(s).into()).collect(),
|v, n, vm| v.py_split_whitespace(n, |s| vm.ctx.new_str(s).into()),
),
}?;
Ok(elements)
}
#[pymethod]
fn rsplit(zelf: &Py<Self>, args: SplitArgs, vm: &VirtualMachine) -> PyResult<Vec<PyObjectRef>> {
let mut elements = zelf.as_wtf8().py_split(
args,
vm,
|| zelf.as_object().to_owned(),
|v, s, vm| v.rsplit(s).map(|s| vm.ctx.new_str(s).into()).collect(),
|v, s, n, vm| v.rsplitn(n, s).map(|s| vm.ctx.new_str(s).into()).collect(),
|v, n, vm| v.py_rsplit_whitespace(n, |s| vm.ctx.new_str(s).into()),
)?;
// Unlike Python rsplit, Rust rsplitn returns an iterator that
// starts from the end of the string.
elements.reverse();
Ok(elements)
}
#[pymethod]
fn strip(&self, chars: OptionalOption<PyStrRef>) -> Self {
match self.as_str_kind() {
PyKindStr::Ascii(s) => s
.py_strip(
chars,
|s, chars| {
let s = s
.as_str()
.trim_matches(|c| memchr::memchr(c as _, chars.as_bytes()).is_some());
unsafe { AsciiStr::from_ascii_unchecked(s.as_bytes()) }
},
|s| s.trim(),
)
.into(),
PyKindStr::Utf8(s) => s
.py_strip(
chars,
|s, chars| s.trim_matches(|c| chars.contains(c)),
|s| s.trim(),
)
.into(),
PyKindStr::Wtf8(w) => w
.py_strip(
chars,
|s, chars| s.trim_matches(|c| chars.code_points().contains(&c)),
|s| s.trim(),
)
.into(),
}
}
#[pymethod]
fn lstrip(
zelf: PyRef<Self>,
chars: OptionalOption<PyStrRef>,
vm: &VirtualMachine,
) -> PyRef<Self> {
let s = zelf.as_wtf8();
let stripped = s.py_strip(
chars,
|s, chars| s.trim_start_matches(|c| chars.contains_code_point(c)),
|s| s.trim_start(),
);
if s == stripped {
zelf
} else {
vm.ctx.new_str(stripped)
}
}
#[pymethod]
fn rstrip(
zelf: PyRef<Self>,
chars: OptionalOption<PyStrRef>,
vm: &VirtualMachine,
) -> PyRef<Self> {
let s = zelf.as_wtf8();
let stripped = s.py_strip(
chars,
|s, chars| s.trim_end_matches(|c| chars.contains_code_point(c)),
|s| s.trim_end(),
);
if s == stripped {
zelf
} else {
vm.ctx.new_str(stripped)
}
}
#[pymethod]
fn endswith(&self, options: anystr::StartsEndsWithArgs, vm: &VirtualMachine) -> PyResult<bool> {
let (affix, substr) =
match options.prepare(self.as_wtf8(), self.len(), |s, r| s.get_chars(r)) {
Some(x) => x,
None => return Ok(false),
};
substr.py_starts_ends_with(
&affix,
"endswith",
"str",
|s, x: &Py<Self>| s.ends_with(x.as_wtf8()),
vm,
)
}
#[pymethod]
fn startswith(
&self,
options: anystr::StartsEndsWithArgs,
vm: &VirtualMachine,
) -> PyResult<bool> {
let (affix, substr) =
match options.prepare(self.as_wtf8(), self.len(), |s, r| s.get_chars(r)) {
Some(x) => x,
None => return Ok(false),
};
substr.py_starts_ends_with(
&affix,
"startswith",
"str",
|s, x: &Py<Self>| s.starts_with(x.as_wtf8()),
vm,
)
}
#[pymethod]
fn removeprefix(&self, pref: PyStrRef) -> Wtf8Buf {
self.as_wtf8()
.py_removeprefix(pref.as_wtf8(), pref.byte_len(), |s, p| s.starts_with(p))
.to_owned()
}
#[pymethod]
fn removesuffix(&self, suffix: PyStrRef) -> Wtf8Buf {
self.as_wtf8()
.py_removesuffix(suffix.as_wtf8(), suffix.byte_len(), |s, p| s.ends_with(p))
.to_owned()
}
#[pymethod]
fn isalnum(&self) -> bool {
!self.data.is_empty() && self.char_all(char::is_alphanumeric)
}
#[pymethod]
fn isnumeric(&self) -> bool {
!self.data.is_empty() && self.char_all(char::is_numeric)
}
#[pymethod]
fn isdigit(&self) -> bool {
// python's isdigit also checks if exponents are digits, these are the unicode codepoints for exponents
!self.data.is_empty()
&& self.char_all(|c| {
c.is_ascii_digit()
|| matches!(c, '⁰' | '¹' | '²' | '³' | '⁴' | '⁵' | '⁶' | '⁷' | '⁸' | '⁹')
})
}
#[pymethod]
fn isdecimal(&self) -> bool {
!self.data.is_empty()
&& self.char_all(|c| GeneralCategory::of(c) == GeneralCategory::DecimalNumber)
}
fn __mod__(&self, values: PyObjectRef, vm: &VirtualMachine) -> PyResult<Wtf8Buf> {
cformat_string(vm, self.as_wtf8(), values)
}
#[pymethod]
fn format(&self, args: FuncArgs, vm: &VirtualMachine) -> PyResult<Wtf8Buf> {
let format_str =
FormatString::from_str(self.as_wtf8()).map_err(|e| e.to_pyexception(vm))?;
format(&format_str, &args, vm)
}
#[pymethod]
fn format_map(&self, mapping: PyObjectRef, vm: &VirtualMachine) -> PyResult<Wtf8Buf> {
let format_string =
FormatString::from_str(self.as_wtf8()).map_err(|err| err.to_pyexception(vm))?;
format_map(&format_string, &mapping, vm)
}
#[pymethod]
fn __format__(
zelf: PyRef<PyStr>,
spec: PyUtf8StrRef,
vm: &VirtualMachine,
) -> PyResult<PyRef<PyStr>> {
if spec.is_empty() {
return if zelf.class().is(vm.ctx.types.str_type) {
Ok(zelf)
} else {