1/*
2 * Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License").  You may not use
5 * this file except in compliance with the License.  You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10struct comp_method_st {
11    int type;                   /* NID for compression library */
12    const char *name;           /* A text string to identify the library */
13    int (*init) (COMP_CTX *ctx);
14    void (*finish) (COMP_CTX *ctx);
15    int (*compress) (COMP_CTX *ctx,
16                     unsigned char *out, unsigned int olen,
17                     unsigned char *in, unsigned int ilen);
18    int (*expand) (COMP_CTX *ctx,
19                   unsigned char *out, unsigned int olen,
20                   unsigned char *in, unsigned int ilen);
21};
22
23struct comp_ctx_st {
24    struct comp_method_st *meth;
25    unsigned long compress_in;
26    unsigned long compress_out;
27    unsigned long expand_in;
28    unsigned long expand_out;
29    void* data;
30};
31