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- /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.] */
-
- #ifndef OPENSSL_HEADER_COMP_H
- #define OPENSSL_HEADER_COMP_H
-
- #include <openssl/base.h>
-
- #include <openssl/ex_data.h>
-
- #if defined(__cplusplus)
- extern "C" {
- #endif
-
-
- /* Compression methods */
-
- /* COMP_zlib returns a method that implements standard, zlib compression. */
- COMP_METHOD *COMP_zlib(void);
-
-
- /* Compression contexts */
-
- /* COMP_CTX_new allocates a fresh |COMP_CTX| which will compress with the given
- * compression method. It returns the new |COMP_CTX| or NULL on error. */
- COMP_CTX *COMP_CTX_new(COMP_METHOD *meth);
-
- /* COMP_CTX_free frees all data owned by |ctx| and |ctx| itself. */
- void COMP_CTX_free(COMP_CTX *ctx);
-
-
- int COMP_compress_block(COMP_CTX *ctx, uint8_t *out, size_t out_len,
- uint8_t *in, size_t in_len);
-
- int COMP_expand_block(COMP_CTX *ctx, uint8_t *out, size_t out_len,
- uint8_t *in, size_t in_len);
-
-
- /* Private functions */
-
- 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;
- };
-
- struct comp_method_st {
- int type; /* NID for compression library */
- const char *name; /* A text string to identify the library */
- int (*init)(COMP_CTX *ctx);
- void (*finish)(COMP_CTX *ctx);
- int (*compress)(COMP_CTX *ctx, uint8_t *out, unsigned int olen, uint8_t *in,
- unsigned int ilen);
- int (*expand)(COMP_CTX *ctx, uint8_t *out, unsigned int olen, uint8_t *in,
- unsigned int ilen);
- /* The following two do NOTHING, but are kept for backward compatibility */
- long (*ctrl)(void);
- long (*callback_ctrl)(void);
- } /* COMP_METHOD */;
-
-
- #if defined(__cplusplus)
- } /* extern C */
- #endif
-
- #endif /* OPENSSL_HEADER_HMAC_H */
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