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/*
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 * Copyright (c) 2002-2005 The TenDRA Project <http://www.tendra.org/>.
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions are met:
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 *
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 * 1. Redistributions of source code must retain the above copyright notice,
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 *    this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice,
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 *    this list of conditions and the following disclaimer in the documentation
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 *    and/or other materials provided with the distribution.
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 * 3. Neither the name of The TenDRA Project nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific, prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
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 * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
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 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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 * EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 *
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 * $Id$
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 */
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/*
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    		 Crown Copyright (c) 1997
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    This TenDRA(r) Computer Program is subject to Copyright
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    owned by the United Kingdom Secretary of State for Defence
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    acting through the Defence Evaluation and Research Agency
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    (DERA).  It is made available to Recipients with a
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    royalty-free licence for its use, reproduction, transfer
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    to other parties and amendment for any purpose not excluding
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    product development provided that any such use et cetera
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    shall be deemed to be acceptance of the following conditions:-
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        (1) Its Recipients shall ensure that this Notice is
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        reproduced upon any copies or amended versions of it;
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        (2) Any amended version of it shall be clearly marked to
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        show both the nature of and the organisation responsible
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        for the relevant amendment or amendments;
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        (3) Its onward transfer from a recipient to another
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        party shall be deemed to be that party's acceptance of
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        these conditions;
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        (4) DERA gives no warranty or assurance as to its
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        quality or suitability for any purpose and DERA accepts
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        no liability whatsoever in relation to any use to which
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        it may be put.
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*/
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#ifndef UTILITY_INCLUDED
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#define UTILITY_INCLUDED
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#ifndef CONFIG_INCLUDED
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#include "config.h"
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#endif
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/*
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    PROCEDURE DECLARATIONS
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    These routines are concerned with error reporting, memory allocation
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    and system calls.
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*/
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extern void error(int, char *, ...);
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extern pointer xalloc(int);
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extern pointer xrealloc(pointer, int);
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extern char *string_copy(char *);
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extern char *string_concat(char *, char *);
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extern char *string_printf(char *, ...);
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extern void create_dir(char *);
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extern void check_name(char *);
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extern time_t date_stamp(char *);
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/*
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    INPUT BUFFER
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    This buffer is used to store input in various contexts.
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*/
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extern char *buffer;
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#define buffsize		5000
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/*
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    ERROR VARIABLES
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    These variables are concerned with error reporting.
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*/
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extern int exit_status;
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extern int no_errors;
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extern int warnings;
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extern char *progname;
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extern char *progvers;
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extern time_t progdate;
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extern char *filename;
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extern int line_no;
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/*
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    ERROR TYPES
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    These values give the severity levels for the error reporting
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    routine, error.
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*/
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#define ERR_FATAL		0
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#define ERR_INTERNAL		1
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#define ERR_SERIOUS		2
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#define ERR_WARNING		3
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#define ERR_INFO		4
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/*
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    UTILITY MACROS
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    These macros give convenient shorthands for various constructs.
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*/
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#define alloc_size(T, N)\
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	((int)(N)*(int)sizeof(T))
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#define alloc_nof(T, N)\
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	(T *)xalloc(alloc_size(T, N))
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#define realloc_nof(P, T, N)\
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	(T *)xrealloc((pointer)(P), alloc_size(T, N))
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#define array_size(A)\
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	((int)sizeof(A) / (int)sizeof(A [0]))
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/*
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    GENERAL ALLOCATION ROUTINE
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    This routine allocates a variable V of type T, allocating N at a time.
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*/
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#define alloc_variable(V, T, N)\
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    {\
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	static int no_free = 0 ;\
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	static T *free_list = null ;\
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	if (no_free == 0) {\
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	    no_free = N ;\
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	    free_list = alloc_nof(T, N);\
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	}\
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	V = free_list + (--no_free);\
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    }
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#endif