/*
 * This C module implements operations on the tree level.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include "types.h"
#include "struct.h"
#include "globals.h"
#include "pathname.h"

static void
visible_walk_dir(pathbuf_start, pathbuf_ptr, dirino, depth, callback)
	char *pathbuf_start, *pathbuf_ptr;
	void (*callback)();
{
	int ndepth = depth + 1;
	int child;
	struct inode_info *inf;

	if (depth > MAX_DIR_NEST) {
		fprintf(stderr,
			"error: max dir nesting exceeded at inode #%x\n",
			dirino);
		return;
	}
	for (child = inode_info[dirino]->descend; child; child = inf->sibling) {
		if (!validate_inode(child)) {
			fprintf(stderr,
			"error: walk of visible tree hit invalid inode #%x\n",
				child);
			return;
		}
		inf = inode_info[child];
		switch (inf->type) {
		case 0x00:
			/* walking the *visible* tree: skip deleted objects */
			continue;
		case 0xF4:
			fprintf(stderr,
	"warning: directory #%x has child #%x of type segment (F4), skipping\n",
				dirino, child);
			continue;
		}
		if (!validate_obj_name(child, 0)) {
			fprintf(stderr,
		"visible tree walk error: no valid name for inode #%x\n",
				child);
			continue;
		}
		sprintf(pathbuf_ptr, "/%s", inf->dataptr);
		callback(pathbuf_start, child, ndepth);
		if (inf->type == 0xF2)
			visible_walk_dir(pathbuf_start,
					 index(pathbuf_ptr, '\0'), child,
					 ndepth, callback);
	}
}

traverse_visible_tree(callback)
	void (*callback)();
{
	char pathbuf[PATHNAME_BUF_SIZE];

	visible_walk_dir(pathbuf, pathbuf, root_inode, 0, callback);
}