/**
 * GBK Encoding Table - 懒加载版本
 *
 * 优化策略：
 * 1. 默认使用精简版编码表 (gbk-lite.ts，约 3500 常用字)
 * 2. 遇到非常用字时动态加载完整编码表
 * 3. 二分查找代替 Map，大幅减少内存占用
 *
 * GBK: 23940 个字符映射
 * Big5: 13911 个字符映射
 */
export declare const unicodeToGbk: Map<number, number>;
export declare const gbkToUnicode: Map<number, number>;
export declare const unicodeToBig5: Map<number, number>;
export declare const big5ToUnicode: Map<number, number>;
/**
 * Get GBK bytes for a Unicode character
 * 先查精简表，查不到再懒加载完整表
 */
export declare function getGbkBytes(unicode: number): [number, number] | null;
/**
 * Get Unicode character from GBK bytes
 * 懒加载完整表
 */
export declare function getUnicodeFromGbk(high: number, low: number): number | null;
/**
 * Get Big5 bytes for a Unicode character
 * 懒加载完整表
 */
export declare function getBig5Bytes(unicode: number): [number, number] | null;
/**
 * Check if a character is in the ASCII range
 * @param code - Unicode code point
 * @returns true if ASCII
 */
export declare function isAscii(code: number): boolean;
/**
 * Check if a character is a CJK character
 * @param code - Unicode code point
 * @returns true if CJK
 */
export declare function isCjk(code: number): boolean;
/**
 * Check if a character is a Chinese punctuation mark
 * @param code - Unicode code point
 * @returns true if Chinese punctuation
 */
export declare function isChinesePunctuation(code: number): boolean;