43 lines
1.6 KiB
JavaScript
43 lines
1.6 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.translateOffset = translateOffset;
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let warned = false;
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function translateOffset(start, fromOffsets, toOffsets, fromLengths, toLengths = fromLengths) {
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const isSorted = fromOffsets.every((value, index) => index === 0 || fromOffsets[index - 1] <= value);
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if (!isSorted) {
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for (let i = 0; i < fromOffsets.length; i++) {
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const fromOffset = fromOffsets[i];
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const fromLength = fromLengths[i];
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if (start >= fromOffset && start <= fromOffset + fromLength) {
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const toLength = toLengths[i];
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const toOffset = toOffsets[i];
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let rangeOffset = Math.min(start - fromOffset, toLength);
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return toOffset + rangeOffset;
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}
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}
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if (!warned) {
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warned = true;
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console.warn('fromOffsets should be sorted in ascending order');
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}
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}
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let low = 0;
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let high = fromOffsets.length - 1;
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while (low <= high) {
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const mid = Math.floor((low + high) / 2);
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const fromOffset = fromOffsets[mid];
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const fromLength = fromLengths[mid];
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if (start >= fromOffset && start <= fromOffset + fromLength) {
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const toLength = toLengths[mid];
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const toOffset = toOffsets[mid];
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let rangeOffset = Math.min(start - fromOffset, toLength);
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return toOffset + rangeOffset;
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}
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else if (start < fromOffset) {
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high = mid - 1;
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}
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else {
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low = mid + 1;
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}
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}
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}
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//# sourceMappingURL=translateOffset.js.map
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