#pragma once

#define iota(x) 1 << (x)
enum
{
    fs·preorder = iota(0),
    fs·nolinks  = iota(1),
    fs·verbose  = iota(2),
};
#undef iota

typedef struct fs·Walker    fs·Walker;
typedef struct fs·History   fs·History;

typedef sys·DirEntry  fs·DirEntry;
typedef sys·Directory fs·Directory;

/* node in filesystem */

// XXX: simplify with our newer code
/* walk a filesystem hierarchy */
struct fs·Walker
{
    int fd, lev, max, err;
    uchar  flags : 4;
    fs·History *hist;
    struct {
        void  *data;
        int  (*func)(void *data, char *relp, char *absp, struct stat *info);
    };
    char *base, *end, path[4096];
};

int  fs·init(fs·Walker *, char *path);
void fs·fini(fs·Walker *);
void fs·walk(fs·Walker *);

/* small utilities */
int     fs·exists(byte *path, int flag);
byte   *fs·dirname(byte *path);
byte   *fs·basename(byte *path);