/*
 *	aegis - project change supervisor
 *	Copyright (C) 1998, 2001 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: functions to accumulate strings
 */

#include <ac/string.h>

#include <mem.h>
#include <stracc.h>


void
stracc_constructor(sap)
	stracc_t	*sap;
{
	sap->length = 0;
	sap->maximum = 0;
	sap->buffer = 0;
}


void
stracc_destructor(sap)
	stracc_t	*sap;
{
	if (sap->buffer)
		mem_free(sap->buffer);
	sap->length = 0;
	sap->maximum = 0;
	sap->buffer = 0;
}


void
stracc_open(sap)
	stracc_t	*sap;
{
	sap->length = 0;
}


string_ty *
stracc_close(sap)
	const stracc_t	*sap;
{
	return str_n_from_c(sap->buffer, sap->length);
}


#undef stracc_char

void
stracc_char(sap, c)
	stracc_t	*sap;
	int		c;
{
	if (sap->length >= sap->maximum)
	{
		sap->maximum = sap->maximum * 2 + 16;
		sap->buffer = mem_change_size(sap->buffer, sap->maximum);
	}
	sap->buffer[sap->length++] = c;
}


void
stracc_chars(sap, cp, n)
	stracc_t	*sap;
	const char	*cp;
	size_t		n;
{
	if (!n)
		return;
	while (sap->length + n > sap->maximum)
	{
		sap->maximum = sap->maximum * 2 + 16;
		sap->buffer = mem_change_size(sap->buffer, sap->maximum);
	}
	memcpy(sap->buffer + sap->length, cp, n);
	sap->length += n;
}