#ifndef INGRAPHS_H
#define INGRAPHS_H
#include <stdio.h>
typedef Agraph_t* (*opengfn)(FILE*);
typedef struct {
void* (*openf)(char*);
Agraph_t* (*readf)(void*);
int (*closef)(void*);
void* dflt;
} ingdisc;
typedef struct {
char** Files;
int ctr;
void* fp;
ingdisc* fns;
char heap;
} ingraph_state;
extern ingraph_state* newIngraph (ingraph_state*, char**, opengfn);
extern ingraph_state* newIng (ingraph_state*, char**, ingdisc*);
extern void closeIngraph (ingraph_state* sp);
extern Agraph_t* nextGraph (ingraph_state*);
extern char* fileName (ingraph_state*);
#endif