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/* $Id: crc32.h 3553 2011-05-05 06:14:19Z nanang $ */
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* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
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* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#ifndef __PJLIB_UTIL_CRC32_H__
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#define __PJLIB_UTIL_CRC32_H__
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* @brief CRC32 implementation
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#include <pjlib-util/types.h>
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* @defgroup PJLIB_UTIL_CRC32 CRC32 (Cyclic Redundancy Check)
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* @ingroup PJLIB_UTIL_ENCRYPTION
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* This implements CRC32 algorithm. See ITU-T V.42 for the formal
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typedef struct pj_crc32_context
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pj_uint32_t crc_state; /**< Current state. */
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* Initialize CRC32 context.
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* @param ctx CRC32 context.
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PJ_DECL(void) pj_crc32_init(pj_crc32_context *ctx);
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* Feed data incrementally to the CRC32 algorithm.
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* @param ctx CRC32 context.
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* @param data Input data.
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* @param nbytes Length of the input data.
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* @return The current CRC32 value.
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PJ_DECL(pj_uint32_t) pj_crc32_update(pj_crc32_context *ctx,
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const pj_uint8_t *data,
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* Finalize CRC32 calculation and retrieve the CRC32 value.
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* @param ctx CRC32 context.
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* @return The current CRC value.
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PJ_DECL(pj_uint32_t) pj_crc32_final(pj_crc32_context *ctx);
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* Perform one-off CRC32 calculation to the specified data.
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* @param data Input data.
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* @param nbytes Length of input data.
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* @return CRC value of the data.
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PJ_DECL(pj_uint32_t) pj_crc32_calc(const pj_uint8_t *data,
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#endif /* __PJLIB_UTIL_CRC32_H__ */