1
2#ifndef HEADER_COMP_H
3#define HEADER_COMP_H
4
5#include <openssl/crypto.h>
6
7#ifdef __cplusplus
8extern "C" {
9#endif
10
11typedef struct comp_ctx_st COMP_CTX;
12
13typedef struct comp_method_st
14 {
15 int type; /* NID for compression library */
16 const char *name; /* A text string to identify the library */
17 int (*init)(COMP_CTX *ctx);
18 void (*finish)(COMP_CTX *ctx);
19 int (*compress)(COMP_CTX *ctx,
20 unsigned char *out, unsigned int olen,
21 unsigned char *in, unsigned int ilen);
22 int (*expand)(COMP_CTX *ctx,
23 unsigned char *out, unsigned int olen,
24 unsigned char *in, unsigned int ilen);
25 /* The following two do NOTHING, but are kept for backward compatibility */
26 long (*ctrl)(void);
27 long (*callback_ctrl)(void);
28 } COMP_METHOD;
29
30struct comp_ctx_st
31 {
32 COMP_METHOD *meth;
33 unsigned long compress_in;
34 unsigned long compress_out;
35 unsigned long expand_in;
36 unsigned long expand_out;
37
38 CRYPTO_EX_DATA ex_data;
39 };
40
41
42COMP_CTX *COMP_CTX_new(COMP_METHOD *meth);
43void COMP_CTX_free(COMP_CTX *ctx);
44int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen,
45 unsigned char *in, int ilen);
46int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen,
47 unsigned char *in, int ilen);
48COMP_METHOD *COMP_rle(void );
49COMP_METHOD *COMP_zlib(void );
50void COMP_zlib_cleanup(void);
51
52#ifdef HEADER_BIO_H
53#ifdef ZLIB
54BIO_METHOD *BIO_f_zlib(void);
55#endif
56#endif
57
58/* BEGIN ERROR CODES */
59/* The following lines are auto generated by the script mkerr.pl. Any changes
60 * made after this point may be overwritten when the script is next run.
61 */
62void ERR_load_COMP_strings(void);
63
64/* Error codes for the COMP functions. */
65
66/* Function codes. */
67#define COMP_F_BIO_ZLIB_FLUSH 99
68#define COMP_F_BIO_ZLIB_NEW 100
69#define COMP_F_BIO_ZLIB_READ 101
70#define COMP_F_BIO_ZLIB_WRITE 102
71
72/* Reason codes. */
73#define COMP_R_ZLIB_DEFLATE_ERROR 99
74#define COMP_R_ZLIB_INFLATE_ERROR 100
75#define COMP_R_ZLIB_NOT_SUPPORTED 101
76
77#ifdef __cplusplus
78}
79#endif
80#endif
81