PC Extra Super CD 1998 January/PCPLUS131.iso/DJGPP/V2/DJLSR201.ZIP/src/libc/dos/compat/d_write.txh

Text File | 1995-10-09 | 1.3 KB | 50 lines

@node _dos_write, dos
@subheading Syntax

@example
#include <dos.h>

unsigned int _dos_write(int handle, const void *buffer, unsigned int count,
                        unsigned int *result);
@end example

@subheading Description

This is a direct connection to the MS-DOS write function call (%ah = 0x40).
No conversion is done on the data; it is written as raw binary data. This
function writes @var{count} bytes from @var{buffer} to @var{handle}.
@var{count} value may be arbitrary size (e.g. > 64KB). It puts number of
bytes written into @var{result} if writing is successful.

@xref{_dos_open}. @xref{_dos_creat}. @xref{_dos_creatnew}.
@xref{_dos_read}. @xref{_dos_close}

@subheading Return Value

Returns 0 if successful or DOS error code on error (and sets @var{errno}
to EACCES or EBADF)

@subheading Example

@example
int handle;
unsigned int result;
char *filebuffer;

if ( !_dos_creat("FOO.DAT", _A_ARCH, &handle) )
@{
   puts("FOO.DAT creating was successful.");
   if ( (filebuffer = malloc(130000)) != NULL )
   @{
     ...
     /* Put something into filebuffer. */
     ...
     if ( !_dos_write(handle, buffer, 130000, &result) )
       printf("%u bytes written into FOO.DAT.", result);
     else
       puts("Writing error.");
   @}
   _dos_close(handle);
@}
@end example