?? comp.h
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#ifndef HEADER_COMP_H#define HEADER_COMP_H#include <openssl/crypto.h>#ifdef __cplusplusextern "C" {#endiftypedef struct comp_method_st { int type; /* NID for compression library */ const char *name; /* A text string to identify the library */ int (*init)(); void (*finish)(); int (*compress)(); int (*expand)(); long (*ctrl)(); long (*callback_ctrl)(); } COMP_METHOD;typedef struct comp_ctx_st { COMP_METHOD *meth; unsigned long compress_in; unsigned long compress_out; unsigned long expand_in; unsigned long expand_out; CRYPTO_EX_DATA ex_data; } COMP_CTX;COMP_CTX *COMP_CTX_new(COMP_METHOD *meth);void COMP_CTX_free(COMP_CTX *ctx);int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen, unsigned char *in, int ilen);int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen, unsigned char *in, int ilen);COMP_METHOD *COMP_rle(void );COMP_METHOD *COMP_zlib(void );/* BEGIN ERROR CODES *//* The following lines are auto generated by the script mkerr.pl. Any changes * made after this point may be overwritten when the script is next run. */void ERR_load_COMP_strings(void);/* Error codes for the COMP functions. *//* Function codes. *//* Reason codes. */#ifdef __cplusplus}#endif#endif
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