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FMEMOPS.C
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1996-11-24
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/* +++Date last modified: 28-Sep-1996 */
/*
** FMEMOPS.C - Emulate MSC's far memory functions in ZTC++ & early BC++
**
** Original Copyright 1988-1992 by Bob Stout as part of
** the MicroFirm Function Library (MFL)
**
** The user is granted a free limited license to use this source file
** to create royalty-free programs, subject to the terms of the
** license restrictions specified in the LICENSE.MFL file.
*/
#if defined(__ZTC__) && !defined(__SC__)
#include <stdlib.h>
#include <dos.h>
#include "fmemops.h"
/*
** Don't #include <string.h> to avoid incompatible prototypes
*/
#if __cplusplus
extern "C" {
#endif
void CDECL movedata(unsigned,unsigned,unsigned,unsigned,size_t);
#if __cplusplus
}
#endif
typedef unsigned char FAR *FarBytePtr;
void FAR * _fmemcpy(void FAR *dest, void FAR *src, size_t count)
{
movedata(FP_SEG(src), FP_OFF(src), FP_SEG(dest), FP_OFF(dest), count);
return dest;
}
void FAR * _fmemmove(void FAR *dest, void FAR *src, size_t count)
{
void FAR *target = dest;
FarBytePtr to = (FarBytePtr)dest, from = (FarBytePtr)src;
if (src >= dest)
_fmemcpy(dest, src, count);
else for (to += count, from += count; count; --count)
*--to = *--from;
return target;
}
void FAR * _fmemset(void FAR *dest, int ch, size_t count)
{
void FAR *target = dest;
FarBytePtr to = (FarBytePtr)dest;
for ( ; count; --count)
*to++ = (unsigned char) ch;
return target;
}
#endif /* __ZTC__ */