overwrite only if both files are the same size Post: 302685123

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LEARN ABOUT OPENDARWIN

curs_overlay

curs_overlay(3X)														  curs_overlay(3X)

NAME

       overlay, overwrite, copywin - overlay and manipulate overlapped curses windows

SYNOPSIS

       #include <curses.h>

       int overlay(const WINDOW *srcwin, WINDOW *dstwin);
       int overwrite(const WINDOW *srcwin, WINDOW *dstwin);
       int copywin(WINDOW *srcwin, WINDOW *dstwin, int sminrow,
	     int smincol, int dminrow, int dmincol, int dmaxrow,
	     int dmaxcol, int overlay);

DESCRIPTION

       The  overlay  and  overwrite  routines  overlay srcwin on top of dstwin.  scrwin and dstwin are not required to be the same size; only text
       where the two windows overlap is copied.  The difference is that overlay is non-destructive (blanks are not copied)  whereas  overwrite	is
       destructive.

       The  copywin routine provides a finer granularity of control over the overlay and overwrite routines.  Like in the prefresh routine, a rec-
       tangle is specified in the destination window, (dminrow, dmincol) and (dmaxrow, dmaxcol), and  the  upper-left-corner  coordinates  of  the
       source window, (sminrow, smincol).  If the argument overlay is true, then copying is non-destructive, as in overlay.

RETURN VALUE

       Routines  that  return  an  integer return ERR upon failure, and OK (SVr4 only specifies "an integer value other than ERR") upon successful
       completion.

NOTES

       Note that overlay and overwrite may be macros.

PORTABILITY

       The XSI Curses standard, Issue 4 describes these functions (adding the const qualifiers).  It further specifies their behavior in the pres-
       ence of characters with multibyte renditions (not yet supported in this implementation).

SEE ALSO

       curses(3X), curs_pad(3X), curs_refresh(3X)

																  curs_overlay(3X)

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