memset.c

c库的部分源代码 用惯了操作系统提供的内存api,你是否了解系统的运行机制,这是提供动态内存分配最简单的实现代码 静态的代码库 可用各种c编译

/***********************************************************************\
*	Copyright 1990 Software Development Systems, Inc.		*
*	all rights reserved						*
\***********************************************************************/
#include <string.h>

void   *memset ( s, c, n )
  void		 *s;
  int		  c;
  register size_t n;
{ register unsigned char  val = (unsigned char)  c;
  register unsigned char *ptr = (unsigned char*) s;
  register unsigned char *end = ptr + n;

    while ( ptr < end )  *ptr++ = val;

    return ( s );
}