comp.h revision 296465 
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    int type;                   /* NID for compression library */
15    const char *name;           /* A text string to identify the library */
16    int (*init) (COMP_CTX *ctx);
17    void (*finish) (COMP_CTX *ctx);
18    int (*compress) (COMP_CTX *ctx,
19                     unsigned char *out, unsigned int olen,
20                     unsigned char *in, unsigned int ilen);
21    int (*expand) (COMP_CTX *ctx,
22                   unsigned char *out, unsigned int olen,
23                   unsigned char *in, unsigned int ilen);
24    /*
25     * The following two do NOTHING, but are kept for backward compatibility
26     */
27    long (*ctrl) (void);
28    long (*callback_ctrl) (void);
29} COMP_METHOD;
30
31struct comp_ctx_st {
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    CRYPTO_EX_DATA ex_data;
38};
39
40COMP_CTX *COMP_CTX_new(COMP_METHOD *meth);
41void COMP_CTX_free(COMP_CTX *ctx);
42int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen,
43                        unsigned char *in, int ilen);
44int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen,
45                      unsigned char *in, int ilen);
46COMP_METHOD *COMP_rle(void);
47COMP_METHOD *COMP_zlib(void);
48void COMP_zlib_cleanup(void);
49
50# ifdef HEADER_BIO_H
51#  ifdef ZLIB
52BIO_METHOD *BIO_f_zlib(void);
53#  endif
54# endif
55
56/* BEGIN ERROR CODES */
57/*
58 * The following lines are auto generated by the script mkerr.pl. Any changes
59 * made after this point may be overwritten when the script is next run.
60 */
61void ERR_load_COMP_strings(void);
62
63/* Error codes for the COMP functions. */
64
65/* Function codes. */
66# define COMP_F_BIO_ZLIB_FLUSH                            99
67# define COMP_F_BIO_ZLIB_NEW                              100
68# define COMP_F_BIO_ZLIB_READ                             101
69# define COMP_F_BIO_ZLIB_WRITE                            102
70
71/* Reason codes. */
72# define COMP_R_ZLIB_DEFLATE_ERROR                        99
73# define COMP_R_ZLIB_INFLATE_ERROR                        100
74# define COMP_R_ZLIB_NOT_SUPPORTED                        101
75
76#ifdef  __cplusplus
77}
78#endif
79#endif
80