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comp.h
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1 
2 #ifndef HEADER_COMP_H
3 #define HEADER_COMP_H
4 
5 #include <openssl/crypto.h>
6 
7 #ifdef __cplusplus
8 extern "C" {
9 #endif
10 
11 typedef struct comp_ctx_st COMP_CTX;
12 
13 typedef 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 
30 struct comp_ctx_st
31  {
33  unsigned long compress_in;
34  unsigned long compress_out;
35  unsigned long expand_in;
36  unsigned long expand_out;
37 
39  };
40 
41 
43 void COMP_CTX_free(COMP_CTX *ctx);
44 int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen,
45  unsigned char *in, int ilen);
46 int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen,
47  unsigned char *in, int ilen);
48 COMP_METHOD *COMP_rle(void );
49 COMP_METHOD *COMP_zlib(void );
50 void COMP_zlib_cleanup(void);
51 
52 #ifdef HEADER_BIO_H
53 #ifdef ZLIB
54 BIO_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  */
62 void 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