/*
    File lz_nonslide.h, part of lzxcomp library
    Copyright (C) 2002 Matthew T. Russotto

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation; version 2.1 only

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

*/

#pragma once

typedef struct lz_info lz_info;
typedef int (*get_chars_t)(lz_info *lzi, int n, unsigned char *buf);
typedef int (*output_match_t)(lz_info *lzi, int match_pos, int match_len);
typedef void (*output_literal_t)(lz_info *lzi, unsigned char ch);

struct lz_info {
    int wsize;     /* window size in bytes */
    int max_match; /* size of longest match in bytes */
    int min_match;
    unsigned char *block_buf;
    unsigned char *block_bufe;
    int block_buf_size;
    int chars_in_buf;
    int cur_loc; /* location within stream */
    int block_loc;
    int frame_size;
    int max_dist;
    unsigned char **prevtab;
    int *lentab;
    short eofcount;
    short stop;
    short analysis_valid;

    get_chars_t get_chars;
    output_match_t output_match;
    output_literal_t output_literal;
    void *user_data;
};

void lz_init(
    lz_info *lzi,
    int wsize,
    int max_dist,
    int max_match,
    int min_match,
    int frame_size,
    get_chars_t get_chars,
    output_match_t output_match,
    output_literal_t output_literal,
    void *user_data);

void lz_release(lz_info *lzi);

void lz_reset(lz_info *lzi);
void lz_stop_compressing(lz_info *lzi);
int lz_left_to_process(lz_info *lzi); /* returns # chars read in but unprocessed */
int lz_compress(lz_info *lzi, int nchars);
