crypto/openssl/crypto/comp/comp.h

   1
   2 #ifndef HEADER_COMP_H
   3 # define HEADER_COMP_H
   4
   5 # include <openssl/crypto.h>
   6
   7 # ifdef OPENSSL_NO_COMP
   8 #  error COMP is disabled.
   9 # endif
  10
  11 #ifdef  __cplusplus
  12 extern "C" {
  13 #endif
  14
  15 typedef struct comp_ctx_st COMP_CTX;
  16
  17 typedef struct comp_method_st {
  18     int type;                   /* NID for compression library */
  19     const char *name;           /* A text string to identify the library */
  20     int (*init) (COMP_CTX *ctx);
  21     void (*finish) (COMP_CTX *ctx);
  22     int (*compress) (COMP_CTX *ctx,
  23                      unsigned char *out, unsigned int olen,
  24                      unsigned char *in, unsigned int ilen);
  25     int (*expand) (COMP_CTX *ctx,
  26                    unsigned char *out, unsigned int olen,
  27                    unsigned char *in, unsigned int ilen);
  28     /*
  29      * The following two do NOTHING, but are kept for backward compatibility
  30      */
  31     long (*ctrl) (void);
  32     long (*callback_ctrl) (void);
  33 } COMP_METHOD;
  34
  35 struct comp_ctx_st {
  36     COMP_METHOD *meth;
  37     unsigned long compress_in;
  38     unsigned long compress_out;
  39     unsigned long expand_in;
  40     unsigned long expand_out;
  41     CRYPTO_EX_DATA ex_data;
  42 };
  43
  44 COMP_CTX *COMP_CTX_new(COMP_METHOD *meth);
  45 void COMP_CTX_free(COMP_CTX *ctx);
  46 int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen,
  47                         unsigned char *in, int ilen);
  48 int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen,
  49                       unsigned char *in, int ilen);
  50 COMP_METHOD *COMP_rle(void);
  51 COMP_METHOD *COMP_zlib(void);
  52 void COMP_zlib_cleanup(void);
  53
  54 # ifdef HEADER_BIO_H
  55 #  ifdef ZLIB
  56 BIO_METHOD *BIO_f_zlib(void);
  57 #  endif
  58 # endif
  59
  60 /* BEGIN ERROR CODES */
  61 /*
  62  * The following lines are auto generated by the script mkerr.pl. Any changes
  63  * made after this point may be overwritten when the script is next run.
  64  */
  65 void ERR_load_COMP_strings(void);
  66
  67 /* Error codes for the COMP functions. */
  68
  69 /* Function codes. */
  70 # define COMP_F_BIO_ZLIB_FLUSH                            99
  71 # define COMP_F_BIO_ZLIB_NEW                              100
  72 # define COMP_F_BIO_ZLIB_READ                             101
  73 # define COMP_F_BIO_ZLIB_WRITE                            102
  74
  75 /* Reason codes. */
  76 # define COMP_R_ZLIB_DEFLATE_ERROR                        99
  77 # define COMP_R_ZLIB_INFLATE_ERROR                        100
  78 # define COMP_R_ZLIB_NOT_SUPPORTED                        101
  79
  80 #ifdef  __cplusplus
  81 }
  82 #endif
  83 #endif