vlc_md5.h
资源名称:vlc-1.0.5.zip [点击查看]
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上传日期:2020-07-06
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文件大小:3k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * vlc_md5.h: MD5 hash
- *****************************************************************************
- * Copyright (C) 2004-2005 the VideoLAN team
- * $Id: d05126980ffacc7e6778cdc35a74339374386292 $
- *
- * Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
- * Sam Hocevar <sam@zoy.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- #ifndef VLC_MD5_H
- # define VLC_MD5_H
- /**
- * file
- * This file defines functions and structures for handling md5 checksums
- */
- /*****************************************************************************
- * md5_s: MD5 message structure
- *****************************************************************************
- * This structure stores the static information needed to compute an MD5
- * hash. It has an extra data buffer to allow non-aligned writes.
- *****************************************************************************/
- struct md5_s
- {
- uint64_t i_bits; /* Total written bits */
- uint32_t p_digest[4]; /* The MD5 digest */
- uint32_t p_data[16]; /* Buffer to cache non-aligned writes */
- };
- VLC_EXPORT(void, InitMD5, ( struct md5_s * ) );
- VLC_EXPORT(void, AddMD5, ( struct md5_s *, const void *, size_t ) );
- VLC_EXPORT(void, EndMD5, ( struct md5_s * ) );
- /**
- * Returns a char representation of the md5 hash, as shown by UNIX md5 or
- * md5sum tools.
- */
- static inline char * psz_md5_hash( struct md5_s *md5_s )
- {
- char *psz = malloc( 33 ); /* md5 string is 32 bytes + NULL character */
- if( !psz ) return NULL;
- int i;
- for ( i = 0; i < 4; i++ )
- {
- sprintf( &psz[8*i], "%02x%02x%02x%02x",
- md5_s->p_digest[i] & 0xff,
- ( md5_s->p_digest[i] >> 8 ) & 0xff,
- ( md5_s->p_digest[i] >> 16 ) & 0xff,
- md5_s->p_digest[i] >> 24
- );
- }
- psz[32] = ' ';
- return psz;
- }
- #endif