#include <stdio.h>

#define VBUF_ABUF_SIZE 16

typedef struct {
	unsigned int flags;
	unsigned int len;
	unsigned int size;
	unsigned int chunksize;
	char* ptr;
	char abuf[VBUF_ABUF_SIZE];
} vbuf_t;

void
vbuf_init0(vbuf_t* vbuf);

void
vbuf_destroy(vbuf_t* vbuf);

vbuf_t*
vbuf_createbuf2(const char* buf, int len);

void
vbuf_init(vbuf_t* vbuf);

void
vbuf_freeptr(vbuf_t* vbuf);

int
vbuf_gets(vbuf_t* vbuf, FILE* fp);

void
vbuf_ensure(vbuf_t* vbuf, unsigned int delta);

char*
vbuf_tostring(const vbuf_t* vbuf);

const char*
vbuf_notnull(const vbuf_t* vbuf);