mirror of
https://github.com/fluencelabs/assemblyscript
synced 2025-04-26 15:32:16 +00:00
80 lines
2.5 KiB
TypeScript
80 lines
2.5 KiB
TypeScript
import { Typeinfo, TypeinfoFlags } from "./shared/typeinfo";
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import { E_INDEXOUTOFRANGE } from "./util/error";
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import { BLOCK, BLOCK_OVERHEAD } from "./rt/common";
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import { ArrayBufferView } from "./arraybuffer";
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// @ts-ignore: decorator
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@builtin
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export declare const RTTI_BASE: usize;
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// @ts-ignore: decorator
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@builtin @unsafe
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export declare function __visit_globals(cookie: u32): void;
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// @ts-ignore: decorator
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@builtin @unsafe
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export declare function __visit_members(ref: usize, cookie: u32): void;
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// @ts-ignore: decorator
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@unsafe
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export function __typeinfo(id: u32): TypeinfoFlags {
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var ptr = RTTI_BASE;
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if (id > load<u32>(ptr)) throw new Error(E_INDEXOUTOFRANGE);
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return changetype<Typeinfo>(ptr + sizeof<u32>() + id * offsetof<Typeinfo>()).flags;
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}
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// @ts-ignore: decorator
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@unsafe
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export function __instanceof(ref: usize, superId: u32): bool { // keyword
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var id = changetype<BLOCK>(ref - BLOCK_OVERHEAD).rtId;
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var ptr = RTTI_BASE;
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if (id <= load<u32>(ptr)) {
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do if (id == superId) return true;
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while (id = changetype<Typeinfo>(ptr + sizeof<u32>() + id * offsetof<Typeinfo>()).base);
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}
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return false;
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}
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// @ts-ignore: decorator
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@unsafe
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export function __allocArray(length: i32, alignLog2: usize, id: u32, data: usize = 0): usize {
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var array = __alloc(offsetof<i32[]>(), id);
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var bufferSize = <usize>length << alignLog2;
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var buffer = __alloc(bufferSize, idof<ArrayBuffer>());
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store<usize>(array, __retain(buffer), offsetof<ArrayBufferView>("data"));
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changetype<ArrayBufferView>(array).dataStart = buffer;
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changetype<ArrayBufferView>(array).dataLength = bufferSize;
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store<i32>(changetype<usize>(array), length, offsetof<i32[]>("length_"));
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if (data) memory.copy(buffer, data, bufferSize);
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return array;
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}
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// These are provided by the respective implementation, included as another entry file by asc:
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// @builtin @unsafe
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// export declare function __alloc(size: usize, id: u32): usize;
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// // @ts-ignore: decorator
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// @builtin @unsafe
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// export declare function __realloc(ref: usize, size: usize): usize;
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// // @ts-ignore: decorator
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// @builtin @unsafe
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// export declare function __free(ref: usize): void;
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// // @ts-ignore: decorator
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// @builtin @unsafe
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// export declare function __retain(ref: usize): usize;
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// // @ts-ignore: decorator
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// @builtin @unsafe
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// export declare function __release(ref: usize): void;
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// // @ts-ignore: decorator
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// @builtin @unsafe
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// export declare function __collect(): void;
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// // @ts-ignore: decorator
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// @builtin @unsafe
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// export declare function __visit(ref: usize, cookie: u32): void;
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