| use crate::rust_string::RustString; |
| use alloc::string::String; |
| use alloc::vec::Vec; |
| use core::mem::ManuallyDrop; |
| |
| #[repr(C)] |
| pub struct RustVec<T> { |
| pub(crate) repr: Vec<T>, |
| } |
| |
| impl<T> RustVec<T> { |
| pub fn new() -> Self { |
| RustVec { repr: Vec::new() } |
| } |
| |
| pub fn from(v: Vec<T>) -> Self { |
| RustVec { repr: v } |
| } |
| |
| pub fn from_ref(v: &Vec<T>) -> &Self { |
| unsafe { &*(v as *const Vec<T> as *const RustVec<T>) } |
| } |
| |
| pub fn from_mut(v: &mut Vec<T>) -> &mut Self { |
| unsafe { &mut *(v as *mut Vec<T> as *mut RustVec<T>) } |
| } |
| |
| pub fn into_vec(self) -> Vec<T> { |
| self.repr |
| } |
| |
| pub fn as_vec(&self) -> &Vec<T> { |
| &self.repr |
| } |
| |
| pub fn as_mut_vec(&mut self) -> &mut Vec<T> { |
| &mut self.repr |
| } |
| |
| pub fn len(&self) -> usize { |
| self.repr.len() |
| } |
| |
| pub fn as_ptr(&self) -> *const T { |
| self.repr.as_ptr() |
| } |
| } |
| |
| impl RustVec<RustString> { |
| pub fn from_vec_string(v: Vec<String>) -> Self { |
| let mut v = ManuallyDrop::new(v); |
| let ptr = v.as_mut_ptr().cast::<RustString>(); |
| let len = v.len(); |
| let cap = v.capacity(); |
| Self::from(unsafe { Vec::from_raw_parts(ptr, len, cap) }) |
| } |
| |
| pub fn from_ref_vec_string(v: &Vec<String>) -> &Self { |
| Self::from_ref(unsafe { &*(v as *const Vec<String> as *const Vec<RustString>) }) |
| } |
| |
| pub fn from_mut_vec_string(v: &mut Vec<String>) -> &mut Self { |
| Self::from_mut(unsafe { &mut *(v as *mut Vec<String> as *mut Vec<RustString>) }) |
| } |
| |
| pub fn into_vec_string(self) -> Vec<String> { |
| let mut v = ManuallyDrop::new(self.repr); |
| let ptr = v.as_mut_ptr().cast::<String>(); |
| let len = v.len(); |
| let cap = v.capacity(); |
| unsafe { Vec::from_raw_parts(ptr, len, cap) } |
| } |
| |
| pub fn as_vec_string(&self) -> &Vec<String> { |
| unsafe { &*(&self.repr as *const Vec<RustString> as *const Vec<String>) } |
| } |
| |
| pub fn as_mut_vec_string(&mut self) -> &mut Vec<String> { |
| unsafe { &mut *(&mut self.repr as *mut Vec<RustString> as *mut Vec<String>) } |
| } |
| } |