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 { 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 30 struct 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 42 COMP_CTX *COMP_CTX_new(COMP_METHOD *meth); 43 void COMP_CTX_free(COMP_CTX *ctx); 44 int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen, 45 unsigned char *in, int ilen); 46 int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen, 47 unsigned char *in, int ilen); 48 COMP_METHOD *COMP_rle(void ); 49 COMP_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 */ 55 void 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