/*

 * msg.c - routines for error messages.

 */

/*

 * Copyright (C) 1986, 1988, 1989, 1991-2001, 2003, 2010-2013, 2017, 2018,

 * the Free Software Foundation, Inc.

 *

 * This file is part of GAWK, the GNU implementation of the

 * AWK Programming Language.

 *

 * GAWK 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, or (at your option)

 * any later version.

 *

 * GAWK 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA

 */

#include "awk.h"

extern FILE *output_fp;

int sourceline = 0;

char *source = NULL;

static const char *srcfile = NULL;

static int srcline;

jmp_buf fatal_tag;

int fatal_tag_valid = 0;

/* err --- print an error message with source line and file and record */

/* VARARGS2 */

void

err(bool isfatal, const char *s, const char *emsg, va_list argp)

{

	char *file;

	const char *me;

	static bool first = true;

	static bool add_src_info = false;

	if (first) {

		first = false;

		add_src_info = (getenv("GAWK_MSG_SRC") != NULL);

	}

	(void) fflush(output_fp);

	me = myname;

	(void) fprintf(stderr, "%s: ", me);

	if (srcfile != NULL && add_src_info) {

		fprintf(stderr, "%s:%d:", srcfile, srcline);

		srcfile = NULL;

	}

	if (sourceline > 0) {

		if (source != NULL)

			(void) fprintf(stderr, "%s:", source);

		else

			(void) fprintf(stderr, _("cmd. line:"));

		(void) fprintf(stderr, "%d: ", sourceline);

	}

#ifdef HAVE_MPFR

	if (FNR_node && is_mpg_number(FNR_node->var_value)) {

		NODE *val;

		val = mpg_update_var(FNR_node);

		assert((val->flags & MPZN) != 0);

		if (mpz_sgn(val->mpg_i) > 0) {

			int len = FILENAME_node->var_value->stlen;

			file = FILENAME_node->var_value->stptr;

			(void) putc('(', stderr);

			if (file)

				(void) fprintf(stderr, "FILENAME=%.*s ", len, file);

			(void) mpfr_fprintf(stderr, "FNR=%Zd) ", val->mpg_i);

		}

	} else

#endif

	if (FNR > 0) {

		int len = FILENAME_node->var_value->stlen;

		file = FILENAME_node->var_value->stptr;

		(void) putc('(', stderr);

		if (file)

			(void) fprintf(stderr, "FILENAME=%.*s ", len, file);

		(void) fprintf(stderr, "FNR=%ld) ", FNR);

	}

	(void) fprintf(stderr, "%s", s);

	vfprintf(stderr, emsg, argp);

	(void) fprintf(stderr, "\n");

	(void) fflush(stderr);

	if (isfatal) {

#ifdef GAWKDEBUG

		// GLIBC 2.27 doesn't necessarily flush on abort. Sigh.

		fflush(NULL);

		abort();

#endif

		gawk_exit(EXIT_FATAL);

	}

}

/* msg --- take a varargs error message and print it */

void

msg(const char *mesg, ...)

{

	va_list args;

	va_start(args, mesg);

	err(false, "", mesg, args);

	va_end(args);

}

/* r_warning --- print a warning message */

void

r_warning(const char *mesg, ...)

{

	va_list args;

	va_start(args, mesg);

	err(false, _("warning: "), mesg, args);

	va_end(args);

}

void

error(const char *mesg, ...)

{

	va_list args;

	va_start(args, mesg);

	err(false, _("error: "), mesg, args);

	va_end(args);

}

/* set_loc --- set location where a fatal error happened */

void

set_loc(const char *file, int line)

{

	srcfile = file;

	srcline = line;

	/* This stupid line keeps some compilers happy: */

	file = srcfile; line = srcline;

}

/* r_fatal --- print a fatal error message */

void

r_fatal(const char *mesg, ...)

{

	va_list args;

	va_start(args, mesg);

	err(true, _("fatal: "), mesg, args);

	va_end(args);

}

/* gawk_exit --- longjmp out if necessary */

void

gawk_exit(int status)

{

	if (fatal_tag_valid) {

		exit_val = status;

		longjmp(fatal_tag, 1);

	}

	final_exit(status);

}

/* final_exit --- run extension exit handlers and exit */

void

final_exit(int status)

{

	/* run any extension exit handlers */

	run_ext_exit_handlers(status);

	/* we could close_io() here */

	close_extensions();

	exit(status);

}