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/*
Copyright (C) 2016-2020, Dirk Krause
SPDX-License-Identifier: BSD-3-Clause
*/

/*
	WARNING: This file was generated by the dkct program (see
	http://dktools.sourceforge.net/ for details).
	Changes you make here will be lost if dkct is run again!
	You should modify the original source and run dkct on it.
	Original source: dk4svbuf.ctr
*/

/**	@file dk4svbuf.c The dk4svbuf module.
*/


#line 77 "dk4svbuf.ctr"


#include "dk4conf.h"
#include "dk4svbuf.h"

#if	DK4_HAVE_ERRNO_H
#ifndef	ERRNO_H_INCLUDED
#include <errno.h>
#define	ERRNO_H_INCLUDED	1
#endif
#endif

#if DK4_HAVE_ASSERT_H
#ifndef	ASSERT_H_INCLUDED
#include <assert.h>
#define	ASSERT_H_INCLUDED 1
#endif
#endif



#line 97 "dk4svbuf.ctr"



/**	Buffering type constants.
*/
static int buffering_types[] = {
	_IONBF, _IOLBF, _IOFBF
};


int
dk4setvbuf(
	FILE					*fipo,
	dk4_file_buffering_t	 tp,
	char					*pbuf,
	size_t					 szbuf,
	dk4_er_t				*erp
)
{
	int		 back	= 0;
#if	DK4_HAVE_SETVBUF
	int		 svbres	= 0;
#endif
	int		 btp;

#if	DK4_USE_ASSERT
  assert(NULL != fipo);
#endif
	if (NULL != fipo) {
		btp = (
			((0 <= (int)tp) && (3 > (int)tp))
			? (buffering_types[(int)tp])
			: (buffering_types[2])
		);
#if DK4_HAVE_SETVBUF
		errno = 0;
		svbres = setvbuf(
			fipo,
			((0 < szbuf) ? (pbuf) : (NULL)),
			(((NULL != pbuf) && (0 < szbuf)) ? (btp) : (buffering_types[0])),
			szbuf
		);
		if (0 == svbres) {
			back = 1;
		}
		else {
			dk4error_set_idetails(erp, DK4_E_SYSTEM, errno);
		}
#else
#if	DK4_HAVE_SETBUFFER
		setbuffer(fipo, pbuf, szbuf);
		back = 1;
#else
		back = 1;
		dk4error_set_simple_error_code(erp, DK4_E_NOT_SUPPORTED);
#endif
#endif
	}
	else {
		dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
	}
	return back;
}

/* vim: set ai sw=4 ts=4 : */