translat.cpp

来自「想学习汇编语言的」· C++ 代码 · 共 24 行

// translat.cpp

#include "translat.h"


/* Translate a buffer of <count> bytes, using an encryption
   character <eChar>. Uses an XOR operation (ASM function).*/

void TranslateBuffer( char * buf, unsigned count, 
                      unsigned char eChar )
{
  __asm {
     mov esi,buf     ; set index register
     mov ecx,count   /* set loop counter */
     mov al,eChar 
  L1:
     xor [esi],al
     inc  esi
     Loop L1
 } // asm

}