/*** *memset.c - set a section of memory to all one byte * * Copyright (c) 1988-2001, Microsoft Corporation. All rights reserved. * *Purpose: * contains the memset() routine * *Revision History: * 05-31-89 JCR C version created. * 02-27-90 GJF Fixed calling type, #include , fixed * copyright. * 08-14-90 SBM Compiles cleanly with -W3 * 10-01-90 GJF New-style function declarator. Also, rewrote expr. to * avoid using cast as an lvalue. * 04-01-91 SRW Add #pragma function for i386 _WIN32_ and _CRUISER_ * builds * 07-16-93 SRW ALPHA Merge * 09-01-93 GJF Merged NT SDK and Cuda versions. * 11-12-93 GJF Replace _MIPS_ and _ALPHA_ with _M_MRX000 and * _M_ALPHA (resp.). * 11-17-93 CFW Fix RtlFillMemory prototype typo. * 12-03-93 GJF Turn on #pragma function for all MS front-ends (esp., * Alpha compiler). * 10-02-94 BWT Add PPC support. * 10-07-97 RDL Added IA64. * *******************************************************************************/ #include #include #ifdef _MSC_VER #pragma function(memset) #endif /*** *char *memset(dst, val, count) - sets "count" bytes at "dst" to "val" * *Purpose: * Sets the first "count" bytes of the memory starting * at "dst" to the character value "val". * *Entry: * void *dst - pointer to memory to fill with val * int val - value to put in dst bytes * size_t count - number of bytes of dst to fill * *Exit: * returns dst, with filled bytes * *Exceptions: * *******************************************************************************/ void * __cdecl memset ( void *dst, int val, size_t count ) { void *start = dst; #if defined(_M_IA64) || defined(_M_AMD64) { #if !defined(LIBCNTPR) __declspec(dllimport) #endif void RtlFillMemory( void *, size_t count, char ); RtlFillMemory( dst, count, (char)val ); } #else while (count--) { *(char *)dst = (char)val; dst = (char *)dst + 1; } #endif return(start); }