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import PHPWasm from "./php-wasm.js";
process.once("message", async ({ code: originalCode, input }) => {
const PRELUDE = `
define('STDIN', fopen('php://stdin', 'r'));
define('STDOUT', fopen('php://stdout', 'r'));
define('STDERR', fopen('php://stderr', 'r'));
error_reporting(E_ALL & ~E_WARNING & ~E_NOTICE & ~E_DEPRECATED);
`;
// remove php tag
let code;
if (originalCode.startsWith("<?php")) {
code = PRELUDE + originalCode.slice(5);
} else if (originalCode.startsWith("<?")) {
code = PRELUDE + originalCode.slice(2);
} else {
code = PRELUDE + originalCode;
}
const BUFFER_MAX = 10 * 1024;
let stdinPos = 0; // bytewise
const stdinBuf = Buffer.from(input);
let stdoutPos = 0; // bytewise
const stdoutBuf = Buffer.alloc(BUFFER_MAX);
let stderrPos = 0; // bytewise
const stderrBuf = Buffer.alloc(BUFFER_MAX);
const { ccall } = await PHPWasm({
stdin: () => {
if (stdinBuf.length <= stdinPos) {
return null;
}
return stdinBuf.readUInt8(stdinPos++);
},
stdout: (asciiCode) => {
if (asciiCode === null) {
return; // flush
}
if (BUFFER_MAX <= stdoutPos) {
return; // ignore
}
stdoutBuf.writeUInt8(
asciiCode < 0 ? asciiCode + 256 : asciiCode,
stdoutPos++,
);
},
stderr: (asciiCode) => {
if (asciiCode === null) {
return; // flush
}
if (BUFFER_MAX <= stderrPos) {
return; // ignore
}
stderrBuf.writeUInt8(
asciiCode < 0 ? asciiCode + 256 : asciiCode,
stderrPos++,
);
},
});
let err;
let result;
try {
result = ccall("php_wasm_run", "number", ["string"], [code]);
} catch (e) {
err = e;
}
if (err) {
process.send({
status: "runtime_error",
stdout: stdoutBuf.subarray(0, stdoutPos).toString(),
stderr: `${stderrBuf.subarray(0, stderrPos).toString()}\n${err.toString()}`,
});
} else {
process.send({
status: result === 0 ? "success" : "runtime_error",
stdout: stdoutBuf.subarray(0, stdoutPos).toString(),
stderr: stderrBuf.subarray(0, stderrPos).toString(),
});
}
});
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