65 lines
2.2 KiB
Rust
65 lines
2.2 KiB
Rust
use crate::ffi::{ExternPointer, IdentifiablePointer, OwnedPtr};
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use crate::static_data::{Ability, AbilityImpl, EffectParameter};
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use crate::StringKey;
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use std::ffi::{c_char, CStr, CString};
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use std::ptr::drop_in_place;
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use std::sync::Arc;
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/// Instantiates a new ability.
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#[no_mangle]
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unsafe extern "C" fn ability_new(
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name: *const c_char,
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effect: *const c_char,
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parameters: *const OwnedPtr<EffectParameter>,
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parameters_length: usize,
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) -> IdentifiablePointer<Arc<dyn Ability>> {
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let parameters = std::slice::from_raw_parts(parameters, parameters_length);
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let mut parameters_vec: Vec<EffectParameter> = Vec::with_capacity(parameters_length);
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for parameter in parameters {
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parameters_vec.push(*Box::from_raw(*parameter));
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}
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let name: StringKey = CStr::from_ptr(name).to_str().unwrap().into();
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let effect: StringKey = CStr::from_ptr(effect).to_str().unwrap().into();
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let arc: Arc<dyn Ability> = Arc::new(AbilityImpl::new(&name, &effect, parameters_vec));
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arc.into()
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}
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/// Drops a reference counted ability.
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#[no_mangle]
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unsafe extern "C" fn ability_drop(ptr: OwnedPtr<Arc<dyn Ability>>) {
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drop_in_place(ptr)
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}
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/// The name of the ability.
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#[no_mangle]
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unsafe extern "C" fn ability_name(ptr: ExternPointer<Arc<dyn Ability>>) -> OwnedPtr<c_char> {
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CString::new(ptr.as_ref().name().str()).unwrap().into_raw()
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}
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/// The name of the script effect of the ability.
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#[no_mangle]
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unsafe extern "C" fn ability_effect(ptr: ExternPointer<Arc<dyn Ability>>) -> OwnedPtr<c_char> {
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CString::new(ptr.as_ref().effect().str()).unwrap().into_raw()
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}
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/// The length of the parameters for the script effect of the ability.
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#[no_mangle]
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unsafe extern "C" fn ability_parameter_length(ptr: ExternPointer<Arc<dyn Ability>>) -> usize {
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ptr.as_ref().parameters().len()
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}
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/// Gets a parameter for the script effect of the ability.
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#[no_mangle]
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unsafe extern "C" fn ability_parameter_get(
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ptr: ExternPointer<Arc<dyn Ability>>,
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index: usize,
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) -> IdentifiablePointer<EffectParameter> {
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if let Some(p) = ptr.as_ref().parameters().get(index) {
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(p as *const EffectParameter).into()
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} else {
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IdentifiablePointer::none()
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}
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}
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