Brunobkr/llama.cpp_AlgMor24_github

1import rng from './rng.js';2import { unsafeStringify } from './stringify.js';3const _state = {};4function v1(options, buf, offset) {5    let bytes;6    const isV6 = options?._v6 ?? false;7    if (options) {8        const optionsKeys = Object.keys(options);9        if (optionsKeys.length === 1 && optionsKeys[0] === '_v6') {10            options = undefined;11        }12    }13    if (options) {14        bytes = v1Bytes(options.random ?? options.rng?.() ?? rng(), options.msecs, options.nsecs, options.clockseq, options.node, buf, offset);15    }16    else {17        const now = Date.now();18        const rnds = rng();19        updateV1State(_state, now, rnds);20        bytes = v1Bytes(rnds, _state.msecs, _state.nsecs, isV6 ? undefined : _state.clockseq, isV6 ? undefined : _state.node, buf, offset);21    }22    return buf ?? unsafeStringify(bytes);23}24export function updateV1State(state, now, rnds) {25    state.msecs ??= -Infinity;26    state.nsecs ??= 0;27    if (now === state.msecs) {28        state.nsecs++;29        if (state.nsecs >= 10000) {30            state.node = undefined;31            state.nsecs = 0;32        }33    }34    else if (now > state.msecs) {35        state.nsecs = 0;36    }37    else if (now < state.msecs) {38        state.node = undefined;39    }40    if (!state.node) {41        state.node = rnds.slice(10, 16);42        state.node[0] |= 0x01;43        state.clockseq = ((rnds[8] << 8) | rnds[9]) & 0x3fff;44    }45    state.msecs = now;46    return state;47}48function v1Bytes(rnds, msecs, nsecs, clockseq, node, buf, offset = 0) {49    if (rnds.length < 16) {50        throw new Error('Random bytes length must be >= 16');51    }52    if (!buf) {53        buf = new Uint8Array(16);54        offset = 0;55    }56    else {57        if (offset < 0 || offset + 16 > buf.length) {58            throw new RangeError(`UUID byte range ${offset}:${offset + 15} is out of buffer bounds`);59        }60    }61    msecs ??= Date.now();62    nsecs ??= 0;63    clockseq ??= ((rnds[8] << 8) | rnds[9]) & 0x3fff;64    node ??= rnds.slice(10, 16);65    msecs += 12219292800000;66    const tl = ((msecs & 0xfffffff) * 10000 + nsecs) % 0x100000000;67    buf[offset++] = (tl >>> 24) & 0xff;68    buf[offset++] = (tl >>> 16) & 0xff;69    buf[offset++] = (tl >>> 8) & 0xff;70    buf[offset++] = tl & 0xff;71    const tmh = ((msecs / 0x100000000) * 10000) & 0xfffffff;72    buf[offset++] = (tmh >>> 8) & 0xff;73    buf[offset++] = tmh & 0xff;74    buf[offset++] = ((tmh >>> 24) & 0xf) | 0x10;75    buf[offset++] = (tmh >>> 16) & 0xff;76    buf[offset++] = (clockseq >>> 8) | 0x80;77    buf[offset++] = clockseq & 0xff;78    for (let n = 0; n < 6; ++n) {79        buf[offset++] = node[n];80    }81    return buf;82}83export default v1;84