comp.h revision 296341
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 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 31struct 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 40COMP_CTX *COMP_CTX_new(COMP_METHOD *meth); 41void COMP_CTX_free(COMP_CTX *ctx); 42int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen, 43 unsigned char *in, int ilen); 44int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen, 45 unsigned char *in, int ilen); 46COMP_METHOD *COMP_rle(void); 47COMP_METHOD *COMP_zlib(void); 48void COMP_zlib_cleanup(void); 49 50# ifdef HEADER_BIO_H 51# ifdef ZLIB 52BIO_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 */ 61void 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 80