1 /*

     2  *    Copyright 2006 Intel Corporation

     3  * 

     4  *    Licensed under the Apache License, Version 2.0 (the "License");

     5  *    you may not use this file except in compliance with the License.

     6  *    You may obtain a copy of the License at

     7  * 

     8  *        http://www.apache.org/licenses/LICENSE-2.0

     9  * 

    10  *    Unless required by applicable law or agreed to in writing, software

    11  *    distributed under the License is distributed on an "AS IS" BASIS,

    12  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

    13  *    See the License for the specific language governing permissions and

    14  *    limitations under the License.

    15  */

    16 

    17 #ifndef _SDNV_C_H_

    18 #define _SDNV_C_H_

    19 

    20 #ifdef __cplusplus

    21 extern "C" {

    22 #endif 

    23 

    24 #include <sys/types.h>

    25 

    26 /**

    27  * Return the number of bytes needed to encode the given value.

    28  */

    29 extern size_t sdnv_encoding_len(u_int64_t val);

    30 

    31 /**

    32  * Convert the given 64-bit integer into an SDNV.

    33  *

    34  * @return The number of bytes used, or -1 on error.

    35  */

    36 extern int sdnv_encode(u_int64_t val, u_char* bp, size_t len);

    37 

    38 /**

    39  * Convert an SDNV pointed to by bp into a unsigned 64-bit

    40  * integer.

    41  *

    42  * @return The number of bytes of bp consumed, or -1 on error.

    43  */

    44 extern int sdnv_decode(const u_char* bp, size_t len, u_int64_t* val);

    45 

    46 #ifdef __cplusplus

    47 }

    48 #endif

    49 

    50 #endif /* _SDNV_C_H_ */