/*
 * This file contains some public functions
 * related to show/set/reset variable commands.
 * Tatsuo Ishii
 * $Id: variable.c,v 1.6 2000/01/18 13:44:48 ishii Exp $
 */

#include "postgres.h"
#include "miscadmin.h"
#include "mb/pg_wchar.h"

bool
parse_client_encoding(const char *value)
{
	int			encoding;

	encoding = pg_valid_client_encoding(value);
	if (encoding < 0)
	{
		if (value)
			elog(ERROR, "Client encoding %s is not supported", value);
		else
			elog(ERROR, "No client encoding is specified");
	}
	else
	{
		if (pg_set_client_encoding(encoding))
		{
			elog(ERROR, "Conversion between %s and %s is not supported",
				 value, pg_encoding_to_char(GetDatabaseEncoding()));
		}
	}
	return TRUE;
}

bool
show_client_encoding()
{
	elog(NOTICE, "Current client encoding is %s",
		 pg_encoding_to_char(pg_get_client_encoding()));
	return TRUE;
}

bool
reset_client_encoding()
{
	int			encoding;
	char	   *env = getenv("PGCLIENTENCODING");

	if (env)
	{
		encoding = pg_char_to_encoding(env);
		if (encoding < 0)
			encoding = GetDatabaseEncoding();
	}
	else
		encoding = GetDatabaseEncoding();
	pg_set_client_encoding(encoding);
	return TRUE;
}

bool
parse_server_encoding(const char *value)
{
	elog(NOTICE, "SET SERVER_ENCODING is not supported");
	return TRUE;
}

bool
show_server_encoding()
{
	elog(NOTICE, "Current server encoding is %s",
		 pg_encoding_to_char(GetDatabaseEncoding()));
	return TRUE;
}

bool
reset_server_encoding()
{
	elog(NOTICE, "RESET SERVER_ENCODING is not supported");
	return TRUE;
}