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391a73c | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 | "use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.indexOf = indexOf;
exports.lastIndexOf = lastIndexOf;
exports.includes = includes;
exports.startsWith = startsWith;
exports.endsWith = endsWith;
exports.slice = slice;
exports.tail = tail;
exports.copy = copy;
exports.compare = compare;
const buffer_source_js_1 = require("./buffer-source.js");
function clampIndex(value, fallback, length) {
const normalized = Number.isFinite(value) ? Math.trunc(value) : fallback;
if (normalized <= 0) {
return 0;
}
if (normalized >= length) {
return length;
}
return normalized;
}
function normalizeForwardRange(length, options) {
const start = clampIndex(options?.start, 0, length);
const end = clampIndex(options?.end, length, length);
return end >= start ? [start, end] : [start, start];
}
function normalizeReverseRange(length, options) {
const start = clampIndex(options?.start, length, length);
const end = clampIndex(options?.end, 0, length);
return start >= end ? [end, start] : [start, start];
}
function normalizeSliceIndex(value, fallback, length) {
const normalized = Number.isFinite(value) ? Math.trunc(value) : fallback;
if (normalized < 0) {
return Math.max(length + normalized, 0);
}
if (normalized > length) {
return length;
}
return normalized;
}
function encodeAscii(text) {
const bytes = new Uint8Array(text.length);
for (let i = 0; i < text.length; i++) {
bytes[i] = text.charCodeAt(i) & 0xff;
}
return bytes;
}
function encodeUtf8(text) {
return new TextEncoder().encode(text);
}
function toPatternBytes(pattern, options) {
if (typeof pattern === "string") {
return options?.encoding === "utf8" ? encodeUtf8(pattern) : encodeAscii(pattern);
}
return (0, buffer_source_js_1.toUint8Array)(pattern);
}
function bytesEqualAt(data, pattern, offset) {
for (let index = 0; index < pattern.byteLength; index++) {
if (data[offset + index] !== pattern[index]) {
return false;
}
}
return true;
}
function indexOf(data, pattern, options) {
const bytes = (0, buffer_source_js_1.toUint8Array)(data);
const needle = toPatternBytes(pattern, options);
const [start, end] = normalizeForwardRange(bytes.byteLength, options);
if (needle.byteLength === 0) {
return start;
}
const lastOffset = end - needle.byteLength;
if (lastOffset < start) {
return -1;
}
for (let offset = start; offset <= lastOffset; offset++) {
if (bytesEqualAt(bytes, needle, offset)) {
return offset;
}
}
return -1;
}
function lastIndexOf(data, pattern, options) {
const bytes = (0, buffer_source_js_1.toUint8Array)(data);
const needle = toPatternBytes(pattern, options);
const [end, start] = normalizeReverseRange(bytes.byteLength, options);
if (needle.byteLength === 0) {
return start;
}
const firstOffset = start - needle.byteLength;
if (firstOffset < end) {
return -1;
}
for (let offset = firstOffset; offset >= end; offset--) {
if (bytesEqualAt(bytes, needle, offset)) {
return offset;
}
}
return -1;
}
function includes(data, pattern, options) {
return indexOf(data, pattern, options) !== -1;
}
function startsWith(data, pattern, options) {
const bytes = (0, buffer_source_js_1.toUint8Array)(data);
const needle = toPatternBytes(pattern, options);
if (needle.byteLength > bytes.byteLength) {
return false;
}
return bytesEqualAt(bytes, needle, 0);
}
function endsWith(data, pattern, options) {
const bytes = (0, buffer_source_js_1.toUint8Array)(data);
const needle = toPatternBytes(pattern, options);
if (needle.byteLength > bytes.byteLength) {
return false;
}
return bytesEqualAt(bytes, needle, bytes.byteLength - needle.byteLength);
}
function slice(data, start, end) {
const bytes = (0, buffer_source_js_1.toUint8Array)(data);
const normalizedStart = normalizeSliceIndex(start, 0, bytes.byteLength);
const normalizedEnd = normalizeSliceIndex(end, bytes.byteLength, bytes.byteLength);
if (normalizedEnd <= normalizedStart) {
return bytes.subarray(normalizedStart, normalizedStart);
}
return bytes.subarray(normalizedStart, normalizedEnd);
}
function tail(data, length) {
const bytes = (0, buffer_source_js_1.toUint8Array)(data);
const normalizedLength = Number.isFinite(length) ? Math.max(0, Math.trunc(length)) : 0;
if (normalizedLength >= bytes.byteLength) {
return bytes;
}
return bytes.subarray(bytes.byteLength - normalizedLength);
}
function copy(data) {
return (0, buffer_source_js_1.toUint8ArrayCopy)(data);
}
function compare(a, b) {
const left = (0, buffer_source_js_1.toUint8Array)(a);
const right = (0, buffer_source_js_1.toUint8Array)(b);
const limit = Math.min(left.byteLength, right.byteLength);
for (let index = 0; index < limit; index++) {
if (left[index] < right[index]) {
return -1;
}
if (left[index] > right[index]) {
return 1;
}
}
if (left.byteLength < right.byteLength) {
return -1;
}
if (left.byteLength > right.byteLength) {
return 1;
}
return 0;
}
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