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https://github.com/axiomatic-systems/Bento4.git
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69 lines
2.0 KiB
C++
69 lines
2.0 KiB
C++
/*****************************************************************
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| AP4 - Win32 Random Byte Generator implementation
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| Copyright 2002-2011 Axiomatic Systems, LLC
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| This file is part of Bento4/AP4 (MP4 Atom Processing Library).
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| Unless you have obtained Bento4 under a difference license,
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| this version of Bento4 is Bento4|GPL.
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| Bento4|GPL 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, or (at your option)
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| any later version.
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| Bento4|GPL 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 Bento4|GPL; see the file COPYING. If not, write to the
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| Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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| 02111-1307, USA.
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****************************************************************/
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/*----------------------------------------------------------------------
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| includes
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+---------------------------------------------------------------------*/
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#define _CRT_RAND_S
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#include <stdlib.h>
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#include "Ap4Utils.h"
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/*----------------------------------------------------------------------
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| AP4_System_GenerateRandomBytes
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_System_GenerateRandomBytes(AP4_UI08* buffer, AP4_Size buffer_size)
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{
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AP4_SetMemory(buffer, 0, buffer_size);
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while (buffer_size) {
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unsigned int r;
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errno_t result = rand_s(&r);
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if (result != 0) return AP4_FAILURE;
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unsigned int chunk = buffer_size < sizeof(r) ? buffer_size : sizeof(r);
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memcpy(buffer, (void*)&r, chunk);
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buffer += chunk;
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buffer_size -= chunk;
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}
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return AP4_SUCCESS;
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}
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