#ifndef INCLUDED_C_RABINKARP_H
#define INCLUDED_C_RABINKARP_H

#ifndef INCLUDED_C_TYPES_H
#include <c_Types.h>
#endif /*INCLUDED_C_TYPES_H*/

#ifndef INCLUDED_C_ALLOCATOR_H
#include <c_Allocator.h>
#endif /*INCLUDED_C_ALLOCATOR_H*/


/* ------------------------------------------------------------------------------------------------------------------ */
/*  */


typedef struct {
    char* pattern;            // 独立深拷贝转储的模式串（子串）载体
    c_size_t m_len;           // 模式串的有效字符物理长度 (M)
    uint64_t pattern_hash;    // 模式串的数字指纹哈希码值
    uint64_t RM;              // 滚动哈希最高位字符的位移系数权重乘子： R^(M-1) % Q
    uint64_t Q_prime;         // 滚动哈希专用的大素数取模基数 (Q)
    uint64_t R_base;          // 字母表物理基数 (常数项乘子，扩展 ASCII 固定为 256)
    c_Allocator_t allocator;  // 统一的内联组合分配器实例
} c_RabinKarp_t;

/* ------------------------------------------------------------------------------------------------------------------ */
/*  */

c_err_t c_RabinKarp_Init(c_RabinKarp_t* self, const char* pattern, c_Allocator_t* allocator);
c_err_t c_RabinKarp_Search(const c_RabinKarp_t* self, const char* text, c_size_t* out_index);
void c_RabinKarp_Destroy(c_RabinKarp_t* self);


#endif /*INCLUDED_C_RABINKARP_H*/