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#![forbid(unsafe_code)]
use core::cmp::Ordering;
use crate::toodee::*;
use crate::view::*;
use crate::ops::*;
/// Provides basic copying operations for `TooDee` structures.
pub trait CopyOps<T> : TooDeeOpsMut<T> {
/// Copies data from another slice into this area. The source slice's length
/// must match the size of this object's area. Data is copied row by row.
///
/// # Examples
///
/// ```
/// use toodee::{TooDee,TooDeeOps,TooDeeOpsMut,CopyOps};
/// let ascending = vec![0, 1, 2, 3, 4];
/// let mut toodee : TooDee<u32> = TooDee::new(10, 5);
/// toodee.view_mut((5, 1), (10, 2)).copy_from_slice(&ascending);
/// ```
fn copy_from_slice(&mut self, src: &[T]) where T: Copy {
let cols = self.num_cols();
assert_eq!(cols * self.num_rows(), src.len());
for (d, s) in self.rows_mut().zip(src.chunks_exact(cols)) {
d.copy_from_slice(s)
}
}
/// Clones data from another slice into this area. The source slice's length
/// must match the size of this object's area. Data is cloned row by row.
///
/// # Examples
///
/// ```
/// use toodee::{TooDee,TooDeeOps,TooDeeOpsMut,CopyOps};
/// let ascending = vec![0, 1, 2, 3, 4];
/// let mut toodee : TooDee<u32> = TooDee::new(10, 5);
/// toodee.view_mut((5, 1), (10, 2)).clone_from_slice(&ascending);
/// ```
fn clone_from_slice(&mut self, src: &[T]) where T: Clone {
let cols = self.num_cols();
assert_eq!(cols * self.num_rows(), src.len());
for (d, s) in self.rows_mut().zip(src.chunks_exact(cols)) {
d.clone_from_slice(s)
}
}
/// Copies data from another `TooDeeOps` object into this one. The source and
/// destination dimensions must match.
///
/// # Examples
///
/// ```
/// use toodee::{TooDee,TooDeeOps,TooDeeOpsMut,CopyOps};
/// let ascending = TooDee::from_vec(5, 1, vec![0, 1, 2, 3, 4]);
/// let mut toodee : TooDee<u32> = TooDee::new(10, 5);
/// toodee.view_mut((5, 1), (10, 2)).copy_from_toodee(&ascending);
/// ```
fn copy_from_toodee(&mut self, src: &impl TooDeeOps<T>) where T : Copy {
assert_eq!(self.size(), src.size());
// Data is copied row by row.
for (d, s) in self.rows_mut().zip(src.rows()) {
d.copy_from_slice(s);
}
}
/// Copies data from another `TooDeeOps` object into this one. The source and
/// destination dimensions must match.
///
/// # Examples
///
/// ```
/// use toodee::{TooDee,TooDeeOps,TooDeeOpsMut,CopyOps};
/// let ascending = TooDee::from_vec(5, 1, vec![0, 1, 2, 3, 4]);
/// let mut toodee : TooDee<u32> = TooDee::new(10, 5);
/// toodee.view_mut((5, 1), (10, 2)).clone_from_toodee(&ascending);
/// ```
fn clone_from_toodee(&mut self, src: &impl TooDeeOps<T>) where T : Clone {
assert_eq!(self.size(), src.size());
// Data is copied row by row.
for (d, s) in self.rows_mut().zip(src.rows()) {
d.clone_from_slice(s);
}
}
/// Copies the `src` area (top-left to bottom-right) to a destination area. `dest` specifies
/// the top-left position of destination area. The `src` area will be partially overwritten
/// if the regions overlap.
///
/// # Panics
///
/// Panics if:
/// - `src` dimensions are outside the array's bounds
/// - there's insufficient room to copy all of `src` to `dest`
///
/// # Examples
///
/// ```
/// use toodee::{TooDee,TooDeeOps,TooDeeOpsMut,CopyOps};
/// let mut toodee : TooDee<u32> = TooDee::new(10, 5);
/// toodee.view_mut((0, 0), (5, 1)).fill(42);
/// assert_eq!(toodee[(3,1)], 0);
/// toodee.copy_within(((0, 0), (5, 1)), (0, 1));
/// assert_eq!(toodee[(3,1)], 42);
/// ```
fn copy_within(&mut self, src: (Coordinate, Coordinate), dest: Coordinate)
where T : Copy {
let (top_left, bottom_right) = src;
assert!(top_left.0 <= bottom_right.0);
assert!(top_left.1 <= bottom_right.1);
let num_cols = self.num_cols();
let num_rows = self.num_rows();
assert!(bottom_right.0 <= num_cols);
assert!(bottom_right.1 <= num_rows);
let cols = bottom_right.0 - top_left.0;
let rows = bottom_right.1 - top_left.1;
assert!(dest.0 + cols <= num_cols);
assert!(dest.1 + rows <= num_rows);
// Ensure that we don't copy over src before copying it to dest.
match top_left.1.cmp(&dest.1) {
Ordering::Less => {
let row_offset = dest.1 - top_left.1;
for r in (top_left.1..bottom_right.1).rev() {
let (s, d) = self.row_pair_mut(r, r + row_offset);
d[dest.0..dest.0 + cols].copy_from_slice(&s[top_left.0..bottom_right.0]);
}
},
Ordering::Greater => {
let row_offset = top_left.1 - dest.1;
for r in top_left.1..bottom_right.1 {
let (s, d) = self.row_pair_mut(r, r - row_offset);
d[dest.0..dest.0 + cols].copy_from_slice(&s[top_left.0..bottom_right.0]);
}
},
Ordering::Equal => {
for r in top_left.1..bottom_right.1 {
let row_data = &mut self[r];
row_data.copy_within(top_left.0..bottom_right.0, dest.0);
}
},
}
}
}
impl<T> CopyOps<T> for TooDeeViewMut<'_, T> {}
impl<T> CopyOps<T> for TooDee<T> {
fn copy_from_slice(&mut self, src: &[T]) where T: Copy {
self.data_mut().copy_from_slice(src);
}
fn clone_from_slice(&mut self, src: &[T]) where T: Clone {
self.data_mut().clone_from_slice(src);
}
fn copy_from_toodee(&mut self, src: &impl TooDeeOps<T>) where T : Copy {
assert_eq!(self.size(), src.size());
let num_cols = self.num_cols();
let mut v = self.data_mut();
for r in src.rows() {
let (fst, snd) = v.split_at_mut(num_cols);
fst.copy_from_slice(r);
v = snd;
}
}
fn clone_from_toodee(&mut self, src: &impl TooDeeOps<T>) where T : Clone {
assert_eq!(self.size(), src.size());
let num_cols = self.num_cols();
let mut v = self.data_mut();
for r in src.rows() {
let (fst, snd) = v.split_at_mut(num_cols);
fst.clone_from_slice(r);
v = snd;
}
}
}