wrjusts.c

来自「详细介绍了一篇关于pci开发的接口芯片」· C语言 代码 · 共 33 行

/*  CXL - Copyright (c) 1987-1989 by Mike Smedley - All Rights Reserved  */
/*  WRJUSTS.C   - right justifies a string in active window  */

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

int wrjusts(int wrow,int wjcol,int attr,char *str)
{
    int row,col,jcol;

    /* check for active window */
    if(!_winfo.total) return(_winfo.errno=W_NOACTIVE);

    /* check for valid coordinates */
    if(wchkcoord(wrow,wjcol)) return(_winfo.errno=W_INVCOORD);

    /* calculate effective coordinates */
    row=_winfo.active->srow+wrow+_winfo.active->border;
    jcol=_winfo.active->scol + wjcol + _winfo.active->border;
    col=jcol - strlen(str) + 1;

    /* make sure left side of string fits in window */
    if( col < (_winfo.active->scol+_winfo.active->border) )
        return(_winfo.errno=W_STRLONG);

    /* display the string */
    prints(row,col,attr,str);

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