135 lines
3.2 KiB
Rust
135 lines
3.2 KiB
Rust
use crate::{heap_drop, heap_move, heap_move_nonnull, ByteSlice};
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use servicepoint::{CharGrid, Grid};
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use std::ptr::NonNull;
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/// Creates a new [CharGrid] with the specified dimensions.
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///
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/// returns: [CharGrid] initialized to 0.
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///
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/// # Examples
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///
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/// ```C
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/// CharGrid grid = sp_char_grid_new(4, 3);
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/// sp_char_grid_fill(grid, '?');
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/// sp_char_grid_set(grid, 0, 0, '!');
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/// sp_char_grid_free(grid);
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/// ```
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#[no_mangle]
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pub unsafe extern "C" fn sp_char_grid_new(
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width: usize,
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height: usize,
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) -> NonNull<CharGrid> {
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heap_move_nonnull(CharGrid::new(width, height))
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}
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/// Loads a [CharGrid] with the specified dimensions from the provided data.
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///
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/// returns: new CharGrid or NULL in case of an error
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#[no_mangle]
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pub unsafe extern "C" fn sp_char_grid_load(
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width: usize,
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height: usize,
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data: ByteSlice,
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) -> *mut CharGrid {
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let data = unsafe { data.as_slice() };
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if let Ok(grid) = CharGrid::load_utf8(width, height, data.to_vec()) {
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heap_move(grid)
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} else {
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std::ptr::null_mut()
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}
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}
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/// Clones a [CharGrid].
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#[no_mangle]
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pub unsafe extern "C" fn sp_char_grid_clone(
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char_grid: NonNull<CharGrid>,
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) -> NonNull<CharGrid> {
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heap_move_nonnull(unsafe { char_grid.as_ref().clone() })
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}
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/// Deallocates a [CharGrid].
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#[no_mangle]
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pub unsafe extern "C" fn sp_char_grid_free(char_grid: NonNull<CharGrid>) {
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unsafe { heap_drop(char_grid) }
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}
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/// Returns the current value at the specified position.
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///
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/// # Arguments
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///
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/// - `char_grid`: instance to read from
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/// - `x` and `y`: position of the cell to read
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///
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/// # Panics
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///
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/// - when accessing `x` or `y` out of bounds
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#[no_mangle]
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pub unsafe extern "C" fn sp_char_grid_get(
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char_grid: NonNull<CharGrid>,
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x: usize,
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y: usize,
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) -> u32 {
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unsafe { char_grid.as_ref().get(x, y) as u32 }
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}
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/// Sets the value of the specified position in the [CharGrid].
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///
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/// # Arguments
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///
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/// - `char_grid`: instance to write to
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/// - `x` and `y`: position of the cell
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/// - `value`: the value to write to the cell
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///
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/// returns: old value of the cell
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///
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/// # Panics
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///
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/// - when accessing `x` or `y` out of bounds
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#[no_mangle]
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pub unsafe extern "C" fn sp_char_grid_set(
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char_grid: NonNull<CharGrid>,
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x: usize,
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y: usize,
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value: u32,
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) {
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unsafe { (*char_grid.as_ptr()).set(x, y, char::from_u32(value).unwrap()) };
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}
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/// Sets the value of all cells in the [CharGrid].
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///
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/// # Arguments
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///
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/// - `char_grid`: instance to write to
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/// - `value`: the value to set all cells to
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#[no_mangle]
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pub unsafe extern "C" fn sp_char_grid_fill(
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char_grid: NonNull<CharGrid>,
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value: u32,
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) {
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unsafe { (*char_grid.as_ptr()).fill(char::from_u32(value).unwrap()) };
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}
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/// Gets the width of the [CharGrid] instance.
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///
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/// # Arguments
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///
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/// - `char_grid`: instance to read from
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#[no_mangle]
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pub unsafe extern "C" fn sp_char_grid_width(
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char_grid: NonNull<CharGrid>,
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) -> usize {
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unsafe { char_grid.as_ref().width() }
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}
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/// Gets the height of the [CharGrid] instance.
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///
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/// # Arguments
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///
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/// - `char_grid`: instance to read from
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#[no_mangle]
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pub unsafe extern "C" fn sp_char_grid_height(
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char_grid: NonNull<CharGrid>,
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) -> usize {
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unsafe { char_grid.as_ref().height() }
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}
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