comp.h revision 160815 
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 );
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 */
55void 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
67