/**
 * The two EDF numeric grammars.
 *
 * Layer 0. Imports one predicate from `latin1.ts` and nothing else. Sole owner of turning an
 * 8-byte ASCII field into a number.
 *
 * The spec says these fields are ASCII, left-justified and space-padded. Real files break
 * that in every way imaginable, so parsing reports *why* it failed rather than returning NaN
 * and leaving the caller to guess which diagnostic the bytes deserve: a comma decimal is
 * fatal, a right-justified field is a warning, and `'20 48'` is neither of those.
 */
/**
 * The outcome of parsing one numeric field.
 *
 * `ok === false` means `value` is meaningless — it is NaN, so a caller that ignores this flag
 * fails loudly instead of quietly recording a plausible 0.
 *
 * `problem` is single-valued and ordered by how much it matters: a field that is both
 * right-justified and comma-separated reports `'comma-decimal'`, because that is the one the
 * caller must refuse.
 */
export interface EdfNumberParse {
    readonly ok: boolean;
    readonly value: number;
    /** The field exactly as it was read, padding included. */
    readonly raw: string;
    readonly problem: 'none' | 'empty' | 'comma-decimal' | 'not-left-justified' | 'malformed';
}
/**
 * Parse a field that must be a whole number: signal count, samples per record, record count,
 * digital minimum and maximum.
 *
 * Exponent forms are deliberately rejected. Every field parsed by this function sizes the
 * file geometry, and `'1E3'` in one of them is far likelier to be corruption than a writer's
 * idea of 1000 — accepting it would turn unreadable bytes into a confidently wrong offset.
 * `'256.0'` is rejected for the same reason.
 */
export declare function parseEdfInteger(raw: string): EdfNumberParse;
/**
 * Parse a field that may be fractional: physical minimum and maximum, record duration.
 *
 * Accepts a leading sign, a bare leading or trailing point, and an exponent, because writers
 * in the wild emit `'+22'`, `'.5'`, `'1E3'` and `'-1.23E-4'`.
 */
export declare function parseEdfNumber(raw: string): EdfNumberParse;
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