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utils.ts
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/
utils.ts
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export function readInt16BE(buffer: Uint8Array, offset: number): number {
offset = offset >>> 0;
const val = buffer[offset + 1] | (buffer[offset] << 8);
return val & 0x8000 ? val | 0xffff0000 : val;
}
export function readUInt16BE(buffer: Uint8Array, offset: number): number {
offset = offset >>> 0;
return buffer[offset] | (buffer[offset + 1] << 8);
}
export function readInt32BE(buffer: Uint8Array, offset: number): number {
offset = offset >>> 0;
return (
(buffer[offset] << 24) |
(buffer[offset + 1] << 16) |
(buffer[offset + 2] << 8) |
buffer[offset + 3]
);
}
export function readUInt32BE(buffer: Uint8Array, offset: number): number {
offset = offset >>> 0;
return (
buffer[offset] * 0x1000000 +
((buffer[offset + 1] << 16) |
(buffer[offset + 2] << 8) |
buffer[offset + 3])
);
}
export interface DsnResult {
driver: string;
user: string;
password: string;
host: string;
port: string;
database: string;
params: {
[key: string]: string;
};
}
export function parseDsn(dsn: string): DsnResult {
const url = new URL(dsn);
const params = {};
for (const [key, value] of url.searchParams.entries()) {
params[key] = value;
}
return {
// remove trailing colon
driver: url.protocol.slice(0, url.protocol.length - 1),
user: url.username,
password: url.password,
host: url.hostname,
port: url.port,
// remove leading slash from path
database: url.pathname.slice(1),
params
};
}
export function delay<T>(ms: number, value?: T): Promise<T> {
return new Promise<T>((resolve, reject) => {
setTimeout(() => {
resolve(value);
}, ms);
});
}