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Malte UblandClaude Opus 5.5
7be1a990c7
`process.stdout.write(data)`/`process.stderr.write(data)` with a chunk whose type is only known at run time (`any`, or a `string | Uint8Array` union) was refused. Lower the one-argument form to the new `process.stdioWriteDyn` libCall, and factor the existing stdio write method's dispatch into `scr_stdio_write_call` so both share Node's Writable validation: a string or a Uint8Array/Buffer writes its bytes, null throws ERR_STREAM_NULL_VALUES, and any other value throws ERR_INVALID_ARG_TYPE, all before anything is written. `scr_stdio_write_call` keeps its exact statements, so it is only the call sites that change; programs that contain a JS stdio value and link the events unit may differ (their write method's bytes). Corpus: `tests/corpus/process-write-dynamic-chunks.ts` covers strings, Buffer, Uint8Array, a string | Uint8Array union, a JSON field, and the four invalid chunks with their codes and messages. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
35 lines
1.2 KiB
TypeScript
35 lines
1.2 KiB
TypeScript
// process.stdout/stderr.write of chunks whose type is only known at run
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// time: `any` values (a child's 'data' chunk, a JSON field) and
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// string | Uint8Array unions. Strings and Uint8Array/Buffer values write
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// their bytes; null throws ERR_STREAM_NULL_VALUES and any other value
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// throws ERR_INVALID_ARG_TYPE, both TypeErrors raised synchronously before
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// anything is written.
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function forward(data: any): boolean {
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return process.stdout.write(data);
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}
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function pick(useBytes: boolean): string | Uint8Array {
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return useBytes ? new Uint8Array([98, 121, 116, 101, 115, 10]) : "text\n";
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}
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console.log("string", forward("any string\n"));
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console.log("buffer", forward(Buffer.from("any buffer\n")));
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console.log("u8", forward(new TextEncoder().encode("any u8\n")));
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process.stdout.write(pick(false));
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process.stdout.write(pick(true));
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process.stderr.write(pick(false));
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const parsed: any = JSON.parse('{"chunk":"from json\\n","n":42}');
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forward(parsed.chunk);
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for (const bad of [parsed.n, null, undefined, { a: 1 }]) {
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try {
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forward(bad);
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console.log("no throw");
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} catch (error) {
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if (error instanceof TypeError) {
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console.log((error as NodeJS.ErrnoException).code, error.message);
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}
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}
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}
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