/* This file is part of 'minixfs' Copyright 1991,1992,1993 S.N. Henson */

#include "minixfs.h"
#include "proto.h"
#include "global.h"

/* inode_busy() scans the list   for a given inode , this is used to stop
 * unlink blowing away a busy inode. In addition f->aux flag is set if 'flag'
 * is non zero. This is to allow a subsequent close to recognise that the inode
 * is marked for zapping.
 */

int inode_busy(inum,drive,flag)
unsigned inum;
int drive;
int flag;	/* Propagate AUX_DEL */
{
    FILEPTR *f;
    int found;

    found=0;
    for(f=firstptr;f;f=f->next)
    {
	if((f->fc.index==inum) && (f->fc.dev==drive))
	{
		if(flag) f->fc.aux|=AUX_DEL;
		if(found!=2) found++;
	}
	else if(found) break; /* Since same files consecutive, halt search */
    }
    return (found);
}


/* Copy characters from 'from' to 'to' translating backslashes to slashes */

void btos_cpy(to,from)
char *to;
const char *from;
{
	char c;
	do {
		c=*from++;	
		if(c=='\\')*to++='/';
		else *to++=c;
	}
	while(c);
}

/* Translate slashes to backslashes , return zero if all characters copied */

int stob_ncpy(to,from,n)
char *to;
const char *from;
long n;
{
	char c;

	if(n==0) return 0;

	do
	{
		c=*from++;
		if(c=='/')*to++='\\';
		else *to++=c;
	}
	while(--n && c );

	if(c)
	{
		*--to='\0';
		return 1;
	}
	return 0;
}