/* This file is part of Eclat.
   Copyright (C) 2012 Sergey Poznyakoff.
 
   Eclat 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 3, or (at your option)
   any later version.
 
   Eclat 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 Eclat.  If not, see <http://www.gnu.org/licenses/>. */

#include "eclat.h"

const char *program_name;

void
vdiag(grecs_locus_t const *locus, const char *qual, const char *fmt, va_list ap)
{
	if (program_name)
		fprintf(stderr, "%s: ", program_name);

	if (locus) {
		size_t size = 0;

		if (locus->beg.col == 0)
			fprintf(stderr, "%s:%u",
				locus->beg.file,
				locus->beg.line);
		else if (strcmp(locus->beg.file, locus->end.file))
			fprintf(stderr, "%s:%u.%u-%s:%u.%u",
				locus->beg.file,
				locus->beg.line, locus->beg.col,
				locus->end.file,
				locus->end.line, locus->end.col);
		else if (locus->beg.line != locus->end.line)
			fprintf(stderr, "%s:%u.%u-%u.%u",
				locus->beg.file,
				locus->beg.line, locus->beg.col,
				locus->end.line, locus->end.col);
		else
			fprintf(stderr, "%s:%u.%u-%u",
				locus->beg.file,
				locus->beg.line, locus->beg.col,
				locus->end.col);
		fprintf(stderr, ": ");
	}
	
	if (qual)
		fprintf(stderr, "%s: ", qual);
	vfprintf(stderr, fmt, ap);
	fputc('\n', stderr);
}

void
diag(grecs_locus_t const *locus, const char *qual, const char *fmt, ...)
{
	va_list ap;
	
	va_start(ap, fmt);
	vdiag(locus, qual, fmt, ap);
	va_end(ap);
}	

void
die(int status, const char *fmt, ...)
{
	va_list ap;
	
	va_start(ap, fmt);
	vdiag(NULL, NULL, fmt, ap);
	va_end(ap);
	exit(status);
}

void
err(const char *fmt, ...)
{
	va_list ap;
	
	va_start(ap, fmt);
	vdiag(NULL, NULL, fmt, ap);
	va_end(ap);
}

void
warn(const char *fmt, ...)
{
	va_list ap;
	
	va_start(ap, fmt);
	vdiag(NULL, "warning", fmt, ap);
	va_end(ap);
}

void
debug_printf(const char *fmt, ...)
{
	va_list ap;
	
	va_start(ap, fmt);
	vdiag(NULL, "debug", fmt, ap);
	va_end(ap);
}