view place.c @ 136:59680a727e9d

Improve previous. Just in case we ever crash and reach cleanup() while processing an -include foo option, take the array entry for it out of the array to make sure it doesn't get freed twice. This case shouldn't be reachable, but it's better to be safe.
author David A. Holland
date Tue, 09 Jul 2013 13:38:43 -0400
parents 05d67dd74e1f
children 26ee741196d1
line wrap: on
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/*-
 * Copyright (c) 2010 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by David A. Holland.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "utils.h"
#include "array.h"
#include "place.h"

struct placefile {
	struct place includedfrom;
	char *dir;
	char *name;
	int depth;
	bool fromsystemdir;
};
DECLARRAY(placefile, static UNUSED);
DEFARRAY(placefile, static);

static struct placefilearray placefiles;
static bool overall_failure;

////////////////////////////////////////////////////////////
// seenfiles

static
struct placefile *
placefile_create(const struct place *from, const char *name,
		 bool fromsystemdir)
{
	struct placefile *pf;
	const char *s;
	size_t len;

	pf = domalloc(sizeof(*pf));
	pf->includedfrom = *from;

	s = strrchr(name, '/');
	len = (s == NULL) ? 0 : s - name;
	pf->dir = dostrndup(name, len);

	pf->name = dostrdup(name);
	pf->fromsystemdir = fromsystemdir;

	if (from->file != NULL) {
		pf->depth = from->file->depth + 1;
	} else {
		pf->depth = 1;
	}
	return pf;
}

static
void
placefile_destroy(struct placefile *pf)
{
	dostrfree(pf->name);
	dofree(pf, sizeof(*pf));
}

DESTROYALL_ARRAY(placefile, );

const char *
place_getparsedir(const struct place *place)
{
	if (place->file == NULL) {
		return ".";
	}
	return place->file->dir;
}

const struct placefile *
place_addfile(const struct place *place, const char *file, bool issystem)
{
	struct placefile *pf;

	pf = placefile_create(place, file, issystem);
	placefilearray_add(&placefiles, pf, NULL);
	if (pf->depth > 120) {
		complain(place, "Maximum include nesting depth exceeded");
		die();
	}
	return pf;
}

////////////////////////////////////////////////////////////
// places

void
place_setnowhere(struct place *p)
{
	p->type = P_NOWHERE;
	p->file = NULL;
	p->line = 0;
	p->column = 0;
}

void
place_setbuiltin(struct place *p, unsigned num)
{
	p->type = P_BUILTIN;
	p->file = NULL;
	p->line = num;
	p->column = 1;
}

void
place_setcommandline(struct place *p, unsigned line, unsigned column)
{
	p->type = P_COMMANDLINE;
	p->file = NULL;
	p->line = line;
	p->column = column;
}

void
place_setfilestart(struct place *p, const struct placefile *pf)
{
	p->type = P_FILE;
	p->file = pf;
	p->line = 1;
	p->column = 1;
}

static
const char *
place_getname(const struct place *p)
{
	switch (p->type) {
	    case P_NOWHERE: return "<nowhere>";
	    case P_BUILTIN: return "<built-in>";
	    case P_COMMANDLINE: return "<command-line>";
	    case P_FILE: return p->file->name;
	}
	assert(0);
	return NULL;
}

static
void
place_printfrom(const struct place *p)
{
	const struct place *from;

	if (p->file == NULL) {
		return;
	}
	from = &p->file->includedfrom;
	if (from->type != P_NOWHERE) {
		place_printfrom(from);
		fprintf(stderr, "In file included from %s:%u:%u:\n",
			place_getname(from), from->line, from->column);
	}
}

////////////////////////////////////////////////////////////
// complaints

void
complain(const struct place *p, const char *fmt, ...)
{
	va_list ap;

	place_printfrom(p);
	fprintf(stderr, "%s:%u:%u: ", place_getname(p), p->line, p->column);
	va_start(ap, fmt);
	vfprintf(stderr, fmt, ap);
	va_end(ap);
	fprintf(stderr, "\n");
}

void
complain_fail(void)
{
	overall_failure = true;
}

bool
complain_failed(void)
{
	return overall_failure;
}

////////////////////////////////////////////////////////////
// module init and cleanup

void
place_init(void)
{
	placefilearray_init(&placefiles);
}

void
place_cleanup(void)
{
	placefilearray_destroyall(&placefiles);
	placefilearray_cleanup(&placefiles);
}