/** Code point intervals `[lo, hi]`, sorted and apart. */
export type CodePointRanges = readonly (readonly [number, number])[];
/** Whether `bytes` is a TrueType or OpenType file (or a collection of
 *  them), the kind {@link sfntCodePointRanges} reads. */
export declare function isSfnt(bytes: Uint8Array): boolean;
/**
 * The characters a TrueType or OpenType file (the first face of a
 * collection) maps to a glyph, as sorted intervals: the Unicode subtable a
 * browser reads (a full-repertoire one, format 12 or 13, else the BMP's
 * format 4), or, in a symbol font, its private-use codes and the Latin-1
 * codes they stand for. Null when the bytes are not such a file or have no
 * Unicode `cmap` (a WOFF or WOFF2 file, a damaged one).
 */
export declare function sfntCodePointRanges(bytes: Uint8Array): CodePointRanges | null;
/** Whether `ranges` hold `cp` (a binary search). */
export declare function rangesHave(ranges: CodePointRanges, cp: number): boolean;
/** The part of `ranges` inside `within` (a slice's `unicode-range`). */
export declare function intersectRanges(ranges: CodePointRanges, within: CodePointRanges): [number, number][];
/** The union of several interval lists. */
export declare function unionRanges(lists: readonly CodePointRanges[]): [number, number][];
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