163 lines
5.5 KiB
JavaScript
163 lines
5.5 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.decodeAsciiMax15 = exports.decodeAscii = void 0;
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const fromCharCode = String.fromCharCode;
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const decodeAscii = (src, position, length) => {
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const bytes = [];
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for (let i = 0; i < length; i++) {
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const byte = src[position++];
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if (byte & 0x80)
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return;
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bytes.push(byte);
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}
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return fromCharCode.apply(String, bytes);
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};
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exports.decodeAscii = decodeAscii;
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const decodeAsciiMax15 = (src, position, length) => {
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if (length < 4) {
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if (length < 2) {
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if (length === 0)
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return '';
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else {
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const a = src[position++];
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if ((a & 0x80) > 1) {
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position -= 1;
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return;
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}
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return fromCharCode(a);
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}
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}
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else {
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const a = src[position++];
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const b = src[position++];
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if ((a & 0x80) > 0 || (b & 0x80) > 0) {
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position -= 2;
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return;
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}
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if (length < 3)
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return fromCharCode(a, b);
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const c = src[position++];
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if ((c & 0x80) > 0) {
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position -= 3;
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return;
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}
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return fromCharCode(a, b, c);
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}
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}
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else {
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const a = src[position++];
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const b = src[position++];
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const c = src[position++];
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const d = src[position++];
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if ((a & 0x80) > 0 || (b & 0x80) > 0 || (c & 0x80) > 0 || (d & 0x80) > 0) {
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position -= 4;
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return;
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}
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if (length < 6) {
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if (length === 4)
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return fromCharCode(a, b, c, d);
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else {
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const e = src[position++];
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if ((e & 0x80) > 0) {
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position -= 5;
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return;
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}
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return fromCharCode(a, b, c, d, e);
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}
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}
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else if (length < 8) {
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const e = src[position++];
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const f = src[position++];
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if ((e & 0x80) > 0 || (f & 0x80) > 0) {
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position -= 6;
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return;
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}
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if (length < 7)
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return fromCharCode(a, b, c, d, e, f);
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const g = src[position++];
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if ((g & 0x80) > 0) {
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position -= 7;
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return;
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}
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return fromCharCode(a, b, c, d, e, f, g);
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}
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else {
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const e = src[position++];
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const f = src[position++];
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const g = src[position++];
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const h = src[position++];
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if ((e & 0x80) > 0 || (f & 0x80) > 0 || (g & 0x80) > 0 || (h & 0x80) > 0) {
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position -= 8;
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return;
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}
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if (length < 10) {
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if (length === 8)
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return fromCharCode(a, b, c, d, e, f, g, h);
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else {
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const i = src[position++];
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if ((i & 0x80) > 0) {
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position -= 9;
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return;
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}
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return fromCharCode(a, b, c, d, e, f, g, h, i);
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}
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}
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else if (length < 12) {
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const i = src[position++];
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const j = src[position++];
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if ((i & 0x80) > 0 || (j & 0x80) > 0) {
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position -= 10;
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return;
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}
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if (length < 11)
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return fromCharCode(a, b, c, d, e, f, g, h, i, j);
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const k = src[position++];
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if ((k & 0x80) > 0) {
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position -= 11;
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return;
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}
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return fromCharCode(a, b, c, d, e, f, g, h, i, j, k);
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}
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else {
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const i = src[position++];
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const j = src[position++];
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const k = src[position++];
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const l = src[position++];
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if ((i & 0x80) > 0 || (j & 0x80) > 0 || (k & 0x80) > 0 || (l & 0x80) > 0) {
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position -= 12;
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return;
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}
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if (length < 14) {
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if (length === 12)
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return fromCharCode(a, b, c, d, e, f, g, h, i, j, k, l);
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else {
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const m = src[position++];
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if ((m & 0x80) > 0) {
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position -= 13;
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return;
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}
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return fromCharCode(a, b, c, d, e, f, g, h, i, j, k, l, m);
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}
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}
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else {
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const m = src[position++];
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const n = src[position++];
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if ((m & 0x80) > 0 || (n & 0x80) > 0) {
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position -= 14;
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return;
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}
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if (length < 15)
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return fromCharCode(a, b, c, d, e, f, g, h, i, j, k, l, m, n);
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const o = src[position++];
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if ((o & 0x80) > 0) {
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position -= 15;
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return;
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}
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return fromCharCode(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o);
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}
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}
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}
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}
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};
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exports.decodeAsciiMax15 = decodeAsciiMax15;
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//# sourceMappingURL=decodeAscii.js.map
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