/*
 *	fhist - file history and comparison tools
 *	Copyright (C) 2000, 2002 Peter Miller;
 *	All rights reserved.
 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation; either version 2 of the License, or
 *	(at your option) any later version.
 *
 *	This program is distributed in the hope that it will be useful,
 *	but WITHOUT ANY WARRANTY; without even the implied warranty of
 *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *	GNU General Public License for more details.
 *
 *	You should have received a copy of the GNU General Public License
 *	along with this program; if not, write to the Free Software
 *	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 *
 * MANIFEST: interface definition for common/output.c
 */

#ifndef LIBAEGIS_OUTPUT_H
#define LIBAEGIS_OUTPUT_H

#include <ac/stdarg.h>
#include <ac/stddef.h>

#include <attrib_forma.h>
#include <main.h>

struct string_ty; /* existence */
struct output_ty;

typedef struct output_ty output_ty;
struct output_ty
{
	struct output_vtbl_ty *vptr;
};

/*
 * This structure is not to be used by clients of this API.  It is only
 * present to permit macro optimization of the interface.
 */
typedef struct output_vtbl_ty output_vtbl_ty;
struct output_vtbl_ty
{
	int		size;

	void (*destructor)(output_ty *);
	const char *(*filename)(output_ty *);
	long (*ftell)(output_ty *);
	void (*fputc)(output_ty *, int);
	void (*fputs)(output_ty *, const char *);
	void (*write)(output_ty *, const void *, size_t);
	void (*flush)(output_ty *);

	/*
	 * By putting this last, we catch many cases where a method
	 * pointer has been left out.
	 */
	const char	*typename;
};

void output_delete(output_ty *);
const char *output_filename(output_ty *);
long output_ftell(output_ty *);
void output_fputc(output_ty *, int);
void output_fputs(output_ty *, const char *);
void output_put_str(output_ty *, struct string_ty *);
void output_write(output_ty *, const void *, size_t);
void output_flush(output_ty *);
void output_fprintf(output_ty *, const char *, ...) ATTRIBUTE_FORMAT_2_3;
void output_vfprintf(output_ty *, const char *, va_list);

#ifndef DEBUG
#ifdef __GNUC__

extern __inline const char *output_filename(output_ty *fp) { return
	fp->vptr->filename(fp); }
extern __inline long output_ftell(output_ty *fp) { return
	fp->vptr->ftell(fp); }
extern __inline void output_fputc(output_ty *fp, int c) {
	fp->vptr->fputc(fp, c); }
extern __inline void output_fputs(output_ty *fp, const char *s) {
	fp->vptr->fputs(fp, s); }
extern __inline void output_write(output_ty *fp, const void *data, size_t len) {
	fp->vptr->write(fp, data, len); }
extern __inline void output_flush(output_ty *fp) {
	fp->vptr->flush(fp); }

#else /* !__GNUC__ */

#define output_filename(fp) ((fp)->vptr->filename(fp))
#define output_ftell(fp) ((fp)->vptr->ftell(fp))
#define output_fputc(fp, c) ((fp)->vptr->fputc((fp), (c)))
#define output_fputs(fp, s) ((fp)->vptr->fputs((fp), (s)))
#define output_write(fp, data, len) ((fp)->vptr->write((fp), (data), (len)))
#define output_flush(fp) ((fp)->vptr->flush(fp))

#endif /* __GNUC__ */
#endif /* DEBUG */

#endif /* LIBAEGIS_OUTPUT_H */