2 * Copyright (C) 2001, 2004, 2005, 2007, 2008 Free Software Foundation
4 * Author: Nikos Mavrogiannopoulos
6 * This file is part of GNUTLS-EXTRA.
8 * GNUTLS-EXTRA is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, either version 3 of the License, or
11 * (at your option) any later version.
13 * GNUTLS-EXTRA is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #include <gnutls_int.h>
23 #include <gnutls_errors.h>
24 #include <gnutls_extensions.h>
25 #include <gnutls_algorithms.h>
28 # include "minilzo/minilzo.h"
29 # elif HAVE_LZO_LZO1X_H
30 # include <lzo/lzo1x.h>
37 /* the number of the compression algorithms available in the compression
40 extern int _gnutls_comp_algorithms_size
;
42 /* Functions in gnutls that have not been initialized.
45 typedef int (*LZO_FUNC
) ();
46 extern LZO_FUNC _gnutls_lzo1x_decompress_safe
;
47 extern LZO_FUNC _gnutls_lzo1x_1_compress
;
49 extern gnutls_compression_entry _gnutls_compression_algorithms
[];
52 _gnutls_add_lzo_comp (void)
56 /* find the last element */
57 for (i
= 0; i
< _gnutls_comp_algorithms_size
; i
++)
59 if (_gnutls_compression_algorithms
[i
].name
== NULL
)
63 if (_gnutls_compression_algorithms
[i
].name
== NULL
64 && (i
< _gnutls_comp_algorithms_size
- 1))
66 _gnutls_compression_algorithms
[i
].name
= "GNUTLS_COMP_LZO";
67 _gnutls_compression_algorithms
[i
].id
= GNUTLS_COMP_LZO
;
68 _gnutls_compression_algorithms
[i
].num
= 0xf2;
70 _gnutls_compression_algorithms
[i
+ 1].name
= 0;
72 /* Now enable the lzo functions: */
73 _gnutls_lzo1x_decompress_safe
= lzo1x_decompress_safe
;
74 _gnutls_lzo1x_1_compress
= lzo1x_1_compress
;
80 return GNUTLS_E_MEMORY_ERROR
;
84 static int _gnutls_init_extra
= 0;
87 * gnutls_global_init_extra - This function initializes the global state of gnutls-extra
89 * This function initializes the global state of gnutls-extra library
90 * to defaults. Returns zero on success.
92 * Note that gnutls_global_init() has to be called before this
93 * function. If this function is not called then the gnutls-extra
94 * library will not be usable.
98 gnutls_global_init_extra (void)
100 /* If the version of libgnutls != version of
101 * libextra, then do not initialize the library.
102 * This is because it may break things.
104 if (strcmp (gnutls_check_version (NULL
), VERSION
) != 0)
106 return GNUTLS_E_LIBRARY_VERSION_MISMATCH
;
109 _gnutls_init_extra
++;
111 if (_gnutls_init_extra
!= 1)
116 /* Initialize the LZO library
119 if (lzo_init () != LZO_E_OK
)
121 return GNUTLS_E_LZO_INIT_FAILED
;
124 /* Add the LZO compression method in the list of compression
127 ret
= _gnutls_add_lzo_comp ();
138 #include <strverscmp.h>
141 * gnutls_extra_check_version - This function checks the library's version
142 * @req_version: the version to check
144 * Check that the version of the gnutls-extra library is at minimum
145 * the requested one and return the version string; return NULL if the
146 * condition is not satisfied. If a NULL is passed to this function,
147 * no check is done, but the version string is simply returned.
151 gnutls_extra_check_version (const char *req_version
)
153 if (!req_version
|| strverscmp (req_version
, VERSION
) <= 0)