dtwalk.c   [plain text]

/*
    This software may only be used by you under license from AT&T Corp.
    ("AT&T").  A copy of AT&T's Source Code Agreement is available at
    AT&T's Internet website having the URL:
    <http://www.research.att.com/sw/tools/graphviz/license/source.html>
    If you received this software without first entering into a license
    with AT&T, you have an infringing copy of this software and cannot use
    it without violating AT&T's intellectual property rights.
*/
#include	"dthdr.h"

#ifdef DMALLOC
#include "dmalloc.h"
#endif

/*	Walk a dictionary and all dictionaries viewed through it.
**	userf:	user function
**
**	Written by Kiem-Phong Vo (5/25/96)
*/

#if __STD_C
int dtwalk(reg Dt_t* dt, int (*userf)(Dt_t*, Void_t*, Void_t*), Void_t* data)
#else
int dtwalk(dt,userf,data)
reg Dt_t*	dt;
int(*		userf)();
Void_t*		data;
#endif
{
	reg Void_t	*obj, *next;
	reg Dt_t*	walk;
	reg int		rv;

	for(obj = dtfirst(dt); obj; )
	{	if(!(walk = dt->walk) )
			walk = dt;
		next = dtnext(dt,obj);
		if((rv = (*userf)(walk, obj, data )) < 0)
			return rv;
		obj = next;
	}
	return 0;
}