bc518174
 王天杨
提交两个项目文件
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const bufLength = 1024 * 16;
// Provide a fallback for older environments.
const td =
typeof TextDecoder !== 'undefined'
? /* #__PURE__ */ new TextDecoder()
: typeof Buffer !== 'undefined'
? {
decode(buf: Uint8Array): string {
const out = Buffer.from(buf.buffer, buf.byteOffset, buf.byteLength);
return out.toString();
},
}
: {
decode(buf: Uint8Array): string {
let out = '';
for (let i = 0; i < buf.length; i++) {
out += String.fromCharCode(buf[i]);
}
return out;
},
};
export class StringWriter {
pos = 0;
private out = '';
private buffer = new Uint8Array(bufLength);
write(v: number): void {
const { buffer } = this;
buffer[this.pos++] = v;
if (this.pos === bufLength) {
this.out += td.decode(buffer);
this.pos = 0;
}
}
flush(): string {
const { buffer, out, pos } = this;
return pos > 0 ? out + td.decode(buffer.subarray(0, pos)) : out;
}
}
export class StringReader {
pos = 0;
declare private buffer: string;
constructor(buffer: string) {
this.buffer = buffer;
}
next(): number {
return this.buffer.charCodeAt(this.pos++);
}
peek(): number {
return this.buffer.charCodeAt(this.pos);
}
indexOf(char: string): number {
const { buffer, pos } = this;
const idx = buffer.indexOf(char, pos);
return idx === -1 ? buffer.length : idx;
}
}
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