versadac  1
versadac - Scalable Recorder Firmware
comp.h
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  {
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 
42 COMP_CTX *COMP_CTX_new(COMP_METHOD *meth);
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 
51 /* BEGIN ERROR CODES */
52 /* The following lines are auto generated by the script mkerr.pl. Any changes
53  * made after this point may be overwritten when the script is next run.
54  */
55 void ERR_load_COMP_strings(void);
56 
57 /* Error codes for the COMP functions. */
58 
59 /* Function codes. */
60 
61 /* Reason codes. */
62 
63 #ifdef __cplusplus
64 }
65 #endif
66 #endif
Definition: comp.h:30
Definition: crypto.h:285
Definition: comp.h:13