MOVEDATA(DOS) XENIX System V MOVEDATA(DOS)
Name
movedata - Copies bytes from a specific address.
Syntax
#include <memory.h>
void movedata (srcseg, srcoff, destseg, destoff, nbytes);
int srcseg;
int srcoff;
int destseg;
int destoff;
unsigned nbytes;
Description
The movedata function copies nbytes bytes from the source
address specified by srcseg:srcoff to the destination
address specified by destseg:destoff.
movedata is intended to be used to move far data in small or
medium model programs where segment addresses of data are
not implicitly known. In large model programs, the memcpy
function can be used since segment addresses are implicitly
known.
Return Value
There is no error return.
See Also
memory(S), segread(DOS), FP_OFF(DOS)
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MOVEDATA(DOS) XENIX System V MOVEDATA(DOS)
Example
#include <memory.h> #include <dos.h>
char far *src; char far *dest; . . . /*
The following statement move 512 bytes of data from ** src
to the dest. */
movedata(FP_SEG(src), FP_OFF(src), FP_SEG(dest),
FP_OFF(dest, 512);
x = -14.87654321; y = modf (x,&n); /* y =
-0.87654321, n = -14.0 */
Notes
Segment values for the srcseg and destseg arguments can be
obtained by using either the segread function or the FP_SEG
macro.
movedata does not handle all cases of overlapping moves
correctly (overlapping moves occur when part of the
destination is the same memory area as part of the source).
Overlapping moves are handled correctly in the memcpy
function.
This call must be compiled with the -dos flag.
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