182 lines
3.6 KiB
JavaScript
182 lines
3.6 KiB
JavaScript
import { parseArgs } from "util";
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let types = {
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u8: {
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c: "uint8_t",
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js: "Uint8",
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size: 1,
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},
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i8: {
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c: "int8_t",
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js: "Int8",
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size: 1,
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},
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u16: {
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c: "uint16_t",
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js: "Uint16",
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size: 2,
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},
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i16: {
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c: "int16_t",
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js: "Int16",
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size: 2,
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},
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u32: {
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c: "uint32_t",
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js: "Uint32",
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size: 4,
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},
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i32: {
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c: "int32_t",
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js: "Int32",
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size: 4,
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},
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f32: {
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c: "float",
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js: "Float32",
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size: 4,
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},
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f64: {
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c: "double",
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js: "Float64",
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size: 8,
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},
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};
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const { values } = parseArgs({
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args: Bun.argv,
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options: {
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schema: {
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type: "string",
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short: "S",
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},
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out: {
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type: "string",
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short: "o"
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}
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},
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strict: true,
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allowPositionals: true,
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});
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function jsStructConstructor(size, containsString) {
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return `
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get bytes() {
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return new Uint8Array(this._ptr);
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}
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constructor(init = {}, ptr = undefined) {
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this._size = ${size};
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this._ptr = ptr.buffer || new ArrayBuffer(this._size);
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this._data = new DataView(this._ptr);
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${
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containsString
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? `
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this._encoder = new TextEncoder();
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this._decoder = new TextDecoder();`
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: ""
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}
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for (const key of Object.keys(init)) {
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this[key] = init[key];
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}
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}`;
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}
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const sFile = Bun.file(values.schema);
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const schema = await sFile.json();
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let cData = "";
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for (const type of Object.keys(schema)) {
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let containsString = false;
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let offset = 0;
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let size = 0;
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let jsData = "";
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const props = schema[type];
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cData += `typedef struct ${type} {`;
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jsData += `class ${type} {`;
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for (const prop of Object.keys(props)) {
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const propType = props[prop].type;
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const kind = props[prop].kind;
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let typeSize = parseInt(types[propType]?.size);
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switch (kind) {
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case "string":
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containsString = true;
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typeSize = props[prop].size;
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const iSize = parseInt(offset) + parseInt(typeSize);
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jsData += `
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get ${prop}() {
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return this._decoder.decode(new Uint8Array(this._ptr.slice(${parseInt(
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offset
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)}, ${iSize})));
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}
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set ${prop}(v) {
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this._data.set(this._encoder.encode(v), ${parseInt(offset)});
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}
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`;
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cData += `
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char ${prop}[${iSize}];`;
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break;
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case "scalar":
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typeSize = types[propType].size;
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jsData += `
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get ${prop}() {
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return this._data.get${types[propType].js}(${parseInt(offset)}, true);
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}
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set ${prop}(v) {
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return this._data.set${types[propType].js}(${parseInt(
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offset
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)}, v, true);
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}
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`;
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cData += `
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${types[propType].c} ${prop};`;
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break;
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case "struct":
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const jsSize = parseInt(offset) + parseInt(types[propType].size);
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jsData += `
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get ${prop}() {
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return new ${propType}({}, new Uint8Array(this._ptr.slice(${offset}, ${jsSize})));
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}
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set ${prop}(v) {
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this._data.set(v.bytes(), ${offset});
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}
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`;
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cData += `
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${types[propType].c} ${prop};`;
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break;
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case "array":
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break;
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default:
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break;
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}
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size += parseInt(typeSize);
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offset += parseInt(typeSize);
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}
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/**
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* add the new type to the list so we can use it for structs later.
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*/
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types[type] = {
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c: type,
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js: type,
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size: parseInt(size),
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};
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jsData += jsStructConstructor(size, containsString);
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jsData += `
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}`;
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cData += `
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} ${type};
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`;
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await Bun.write(Bun.file(values.out + type + ".js"), jsData);
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}
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await Bun.write(Bun.file(values.out + "types.h"), cData);
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