wmessage.c

详细介绍了一篇关于pci开发的接口芯片

/*  CXL - Copyright (c) 1987-1989 by Mike Smedley - All Rights Reserved  */
/*  WMESSAGE.C  - displays text on window's top or bottom border  */

/* Changed to allow if leftofs is negative, then offset is from right */

#include <string.h>
#include "cxlvid.h"
#include "cxlwin.h"

int wmessage(char *str,int border,int leftofs,int attr)
{
    /* check for active window */
    if(!_winfo.total) return(_winfo.errno=W_NOACTIVE);

    /* make sure window has a border */
    if(!_winfo.active->border) return(_winfo.errno=W_NOBORDER);


    if ( leftofs >= 0 )
    {
      /* make sure string fits in window */
      if( (_winfo.active->scol+leftofs+strlen(str)-1) > (_winfo.active->ecol) )
          return(_winfo.errno=W_STRLONG);

      /* display string */
      prints(border?_winfo.active->erow:_winfo.active->srow,
            _winfo.active->scol+leftofs,attr,str);
    }
    else {
      /* Change sign */
      leftofs = -leftofs;
      /* make sure string fits in window */
      if( (_winfo.active->ecol-leftofs-strlen(str)+1) < (_winfo.active->scol) )
          return(_winfo.errno=W_STRLONG);

      /* display string */
      prints(border?_winfo.active->erow:_winfo.active->srow,
            _winfo.active->ecol-leftofs-strlen(str)+1,attr,str);
    }

    /* return normally */
    return(_winfo.errno=W_NOERROR);
}