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File: position.c

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cook 2.19-2
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/*
 *	cook - file construction tool
 *	Copyright (C) 1997, 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 manipulate expression positions
 */

#include <error_intl.h>
#include <expr/position.h>
#include <str.h>
#include <trace.h>


/*
 * NAME
 *	expr_position_constructor
 *
 * SYNOPSIS
 *	void expr_position_constructor(expr_position_ty *, string_ty *, int);
 *
 * DESCRIPTION
 *	The expr_position_constructor function is used to initialize an
 *	expr_position_ty structure for use, given a filename and a line
 *	number.
 */

void
expr_position_constructor(to, fn, ln)
	expr_position_ty *to;
	string_ty	*fn;
	int		ln;
{
	trace(("expr_position_constructor(to = %08lX)\n{\n"/*}*/, (long)to));
	to->pos_name = fn ? str_copy(fn) : str_from_c("");
	to->pos_line = ln;
	trace(("%s:%d (ref cnt %d)\n",
		(to->pos_name ? to->pos_name->str_text : ""), to->pos_line,
		(to->pos_name ? to->pos_name->str_references : 0)));
	trace((/*{*/"}\n"));
}


/*
 * NAME
 *	expr_position_constructorC
 *
 * SYNOPSIS
 *	void expr_position_constructorC(expr_position_ty *, char *, int);
 *
 * DESCRIPTION
 *	The expr_position_constructorC function is used to initialize an
 *	expr_position_ty structure for use, given a filename and a line
 *	number.
 */

void
expr_position_constructorC(to, fn, ln)
	expr_position_ty *to;
	char		*fn;
	int		ln;
{
	trace(("expr_position_constructorC(to = %08lX)\n{\n"/*}*/, (long)to));
	to->pos_name = str_from_c(fn ? fn : "");
	to->pos_line = ln;
	trace(("%s:%d (ref cnt %d)\n",
		(to->pos_name ? to->pos_name->str_text : ""), to->pos_line,
		(to->pos_name ? to->pos_name->str_references : 0)));
	trace((/*{*/"}\n"));
}


/*
 * NAME
 *	expr_position_copy_constructor
 *
 * SYNOPSIS
 *	void expr_position_copy_constructor(expr_position_ty *,
 *		const expr_position_ty *);
 *
 * DESCRIPTION
 *	The expr_position_copy_constructor function is used to
 *	initialize an expr_position_ty structure for use, given a
 *	expr_position_ty instance to copy.
 */

void
expr_position_copy_constructor(to, from)
	expr_position_ty *to;
	const expr_position_ty *from;
{
	trace(("expr_position_copy_constructor(to = %08lX)\n{\n"/*}*/,
		(long)to));
	if (from)
		expr_position_constructor(to, from->pos_name, from->pos_line);
	else
	{
		to->pos_name = str_from_c("");
		to->pos_line = 0;
	}
	trace(("%s:%d (ref cnt %d)\n",
		(to->pos_name ? to->pos_name->str_text : ""), to->pos_line,
		(to->pos_name ? to->pos_name->str_references : 0)));
	trace((/*{*/"}\n"));
}


/*
 * NAME
 *	expr_position_destructor
 *
 * SYNOPSIS
 *	void expr_position_destructor(expr_position_ty *);
 *
 * DESCRIPTION
 *	The expr_position_destructor function is used to release the
 *	resources held by a expr_position_ty structure.
 */

void
expr_position_destructor(pp)
	expr_position_ty *pp;
{
	trace(("expr_position_destructor(pp = %08lX)\n{\n"/*}*/, (long)pp));
	trace(("%s:%d (ref cnt %d)\n",
		(pp->pos_name ? pp->pos_name->str_text : ""), pp->pos_line,
		(pp->pos_name ? pp->pos_name->str_references : 0)));
	if (pp->pos_name)
		str_free(pp->pos_name);
	pp->pos_name = 0;
	pp->pos_line = 0;
	trace((/*{*/"}\n"));
}


/*
 * NAME
 *	error_with_position
 *
 * SYNOPSIS
 *	void error_with_position(expr_position_ty *, char *);
 *
 * DESCRIPTION
 *	The error_with_position function is used to report an error at a
 *	given location.  The arguments should be set using sub_var_set,
 *	as the string will be passed through the internationalized error
 *	functions.
 */

void
error_with_position(pp, scp, fmt)
	const expr_position_ty *pp;
	sub_context_ty	*scp;
	char		*fmt;
{
	string_ty	*s;
	int		need_to_delete;

	if (scp)
		need_to_delete = 0;
	else
	{
		scp = sub_context_new();
		need_to_delete = 1;
	}

	s = subst_intl(scp, fmt);

	/* re-use the substitution context */
	if (pp && pp->pos_name && pp->pos_line)
	{
		sub_var_set(scp, "File_Name", "%S", pp->pos_name);
		sub_var_set(scp, "Number", "%d", pp->pos_line);
		sub_var_set(scp, "MeSsaGe", "%S", s);
		error_intl(scp, i18n("$filename: $number: $message"));
		str_free(s);
	}
	else
	{
		sub_var_set(scp, "MeSsaGe", "%S", s);
		error_intl(scp, i18n("$message"));
		str_free(s);
	}

	if (need_to_delete)
		sub_context_delete(scp);
}