LTKCPP-- LLRP Toolkit C Plus Plus Library
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  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 
31 struct 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 
40 COMP_CTX *COMP_CTX_new(COMP_METHOD *meth);
41 void COMP_CTX_free(COMP_CTX *ctx);
42 int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen,
43  unsigned char *in, int ilen);
44 int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen,
45  unsigned char *in, int ilen);
46 COMP_METHOD *COMP_rle(void);
47 COMP_METHOD *COMP_zlib(void);
48 void COMP_zlib_cleanup(void);
49 
50 # ifdef HEADER_BIO_H
51 # ifdef ZLIB
52 BIO_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  */
61 void 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