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36 #include <openssl/crypto.h>
44 typedef struct comp_ctx_st COMP_CTX;
46 typedef struct comp_method_st
48 int type; /* NID for compression library */
49 const char *name; /* A text string to identify the library */
50 int (*init)(COMP_CTX *ctx);
51 void (*finish)(COMP_CTX *ctx);
52 int (*compress)(COMP_CTX *ctx,
53 unsigned char *out, unsigned int olen,
54 unsigned char *in, unsigned int ilen);
55 int (*expand)(COMP_CTX *ctx,
56 unsigned char *out, unsigned int olen,
57 unsigned char *in, unsigned int ilen);
58 /* The following two do NOTHING, but are kept for backward compatibility */
60 long (*callback_ctrl)(void);
66 unsigned long compress_in;
67 unsigned long compress_out;
68 unsigned long expand_in;
69 unsigned long expand_out;
71 CRYPTO_EX_DATA ex_data;
75 IMPORT_C COMP_CTX *COMP_CTX_new(COMP_METHOD *meth);
76 IMPORT_C void COMP_CTX_free(COMP_CTX *ctx);
77 IMPORT_C int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen,
78 unsigned char *in, int ilen);
79 IMPORT_C int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen,
80 unsigned char *in, int ilen);
81 IMPORT_C COMP_METHOD *COMP_rle(void );
82 IMPORT_C COMP_METHOD *COMP_zlib(void );
84 /* BEGIN ERROR CODES */
85 /* The following lines are auto generated by the script mkerr.pl. Any changes
86 * made after this point may be overwritten when the script is next run.
88 IMPORT_C void ERR_load_COMP_strings(void);
90 /* Error codes for the COMP functions. */