Subversion Repositories SvarDOS

/*

 * replacement for a couple of libc functions

 */

#include <i86.h>

#include <stddef.h>

#include "libc.h"

unsigned short mdr_dos_write(unsigned short handle, const void far *buf, unsigned short count, unsigned short *bytes) {

  unsigned short res = 0;

  unsigned short resax = 0;

  unsigned short buf_seg = FP_SEG(buf);

  unsigned short buf_off = FP_OFF(buf);

  _asm {

    push bx

    push cx

    push dx

    mov ah, 0x40

    mov bx, handle

    mov cx, count

    mov dx, buf_off

    push ds

    mov ds, buf_seg

    int 0x21

    pop ds

    jnc done

    mov res, ax

    done:

    mov resax, ax

    pop dx

    pop cx

    pop bx

  }

  *bytes = resax;

  return(res);

}