crypto/comp/comp.h

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