59 lines
2.2 KiB
Rust
59 lines
2.2 KiB
Rust
use crate::ffi::ffi_handle::{FFIHandle, FromFFIHandle};
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use crate::ffi::{ffi_handle_arc_dyn_getter, FFIResult, OwnedPtrString};
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use crate::static_data::{BattleItemCategory, Item, ItemCategory, ItemImpl};
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use crate::StringKey;
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use anyhow::anyhow;
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use hashbrown::HashSet;
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use std::ffi::{c_char, CStr, CString};
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use std::sync::Arc;
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/// Instantiates an item.
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#[no_mangle]
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unsafe extern "C" fn item_new(
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name: *const c_char,
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category: ItemCategory,
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battle_category: BattleItemCategory,
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price: i32,
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flags: *const *const c_char,
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flags_length: usize,
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) -> FFIResult<FFIHandle<Arc<dyn Item>>> {
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let flags = std::slice::from_raw_parts(flags, flags_length);
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let name: StringKey = match CStr::from_ptr(name).to_str() {
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Ok(name) => name.into(),
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Err(_) => return FFIResult::err(anyhow!("Unable to convert name to string")),
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};
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let mut flags_set: HashSet<StringKey> = HashSet::with_capacity(flags_length);
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for flag in flags {
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let flag = match CStr::from_ptr(*flag).to_str() {
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Ok(flag) => flag,
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Err(_) => return FFIResult::err(anyhow!("Unable to convert flag to string")),
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};
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flags_set.insert(flag.into());
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}
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let item: Arc<dyn Item> = Arc::new(ItemImpl::new(&name, category, battle_category, price, flags_set));
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FFIResult::ok(FFIHandle::get_handle(item.into()))
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}
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/// The name of the item.
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#[no_mangle]
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unsafe extern "C" fn item_name(ptr: FFIHandle<Arc<dyn Item>>) -> FFIResult<OwnedPtrString> {
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let item = ptr.from_ffi_handle();
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let name = item.name();
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match CString::new(name.str()) {
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Ok(name) => FFIResult::ok(OwnedPtrString(name.into_raw())),
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Err(_) => FFIResult::err(anyhow!("Unable to convert name `{}` to CString", name.str())),
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}
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}
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ffi_handle_arc_dyn_getter!(Item, category, ItemCategory);
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ffi_handle_arc_dyn_getter!(Item, battle_category, BattleItemCategory);
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ffi_handle_arc_dyn_getter!(Item, price, i32);
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/// Checks whether the item has a specific flag.
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#[no_mangle]
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unsafe extern "C" fn item_has_flag(ptr: FFIHandle<Arc<dyn Item>>, flag: *const c_char) -> u8 {
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let flag = CStr::from_ptr(flag).into();
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u8::from(ptr.from_ffi_handle().has_flag(&flag))
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}
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