export interface E57FileHeader {
    majorVersion: number;
    minorVersion: number;
    fileLogicalSize: number;
    xmlLogicalOffset: number;
    xmlLogicalLength: number;
    pageSize: number;
}
/** Read the 48-byte FileHeader. Throws on bad magic. */
export declare function parseE57FileHeader(bytes: Uint8Array): E57FileHeader;
/**
 * Strip the 4-byte CRC tail from each `pageSize`-byte physical page.
 *
 * Returns a freshly-allocated buffer of "logical" bytes — the form that
 * XML offsets and CompressedVector data offsets reference.
 *
 * `pageSize` is read from the header and is conventionally 1024.
 */
export declare function stripPageCrc(bytes: Uint8Array, pageSize: number): Uint8Array;
/** Convert a physical (CRC-paged) offset to the equivalent logical offset. */
export declare function physicalToLogical(physical: number, pageSize: number): number;
/**
 * Convert a logical (CRC-stripped) offset back to its physical (on-disk)
 * offset — the inverse of `physicalToLogical`. Needed by the streaming
 * reader to translate XML / section offsets into the byte ranges it must
 * `Blob.slice()` from disk.
 */
export declare function logicalToPhysical(logical: number, pageSize: number): number;
/**
 * Read a CompressedVector binary-section header (E57 spec §6.4.2) and
 * return the LOGICAL byte offset where its DataPackets actually start.
 *
 * Layout (32 bytes):
 *   [ 0]  u8     sectionId           (must == 1 for CompressedVector)
 *   [ 1]  u8[7]  reserved
 *   [ 8]  u64 LE sectionLogicalLength
 *   [16]  u64 LE dataPhysicalOffset
 *   [24]  u64 LE indexPhysicalOffset
 *
 * The XML's `points@fileOffset` points at this section header — NOT at
 * the first DataPacket. Reading packets straight at `fileOffset` puts
 * the parser ~32 bytes off and the first u16 it reads is the low half
 * of `sectionLogicalLength`, which usually decodes as a bytestreamCount
 * of 0 (matched the user-reported `bytestreamCount (0) ≠ prototype
 * length (7)` error exactly).
 */
export declare function resolveCompressedVectorDataOffset(logical: Uint8Array, physicalSectionOffset: number, pageSize: number): number;
export declare function readU64LE(view: DataView, offset: number): number;
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