xref: /src/usr.bin/xlint/lint1/debug.c

/* $NetBSD: debug.c,v 1.2 2021/08/01 19:11:54 rillig Exp $ */

/*-
 * Copyright (c) 2021 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Roland Illig <rillig (at) NetBSD.org>.
 *
 * 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.
 */

#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif

#include <sys/cdefs.h>
#if defined(__RCSID) && !defined(lint)
__RCSID("$NetBSD: debug.c,v 1.2 2021/08/01 19:11:54 rillig Exp $");
#endif

#include <stdlib.h>

#include "lint1.h"


#ifdef DEBUG

static int debug_indentation = 0;


void __printflike(1, 2)
debug_printf(const char *fmt, ...)
{
	va_list va;

	va_start(va, fmt);
	vfprintf(stdout, fmt, va);
	va_end(va);
}

void
debug_indent(void)
{

	debug_printf("%*s", 2 * debug_indentation, "");
}

void
debug_indent_inc(void)
{

	debug_indentation++;
}

void
debug_indent_dec(void)
{

	debug_indentation--;
}

void
(debug_enter)(const char *func)
{

	printf("%*s+ %s\n", 2 * debug_indentation++, "", func);
}

void __printflike(1, 2)
debug_step(const char *fmt, ...)
{
	va_list va;

	debug_indent();
	va_start(va, fmt);
	vfprintf(stdout, fmt, va);
	va_end(va);
	printf("\n");
}

void
(debug_leave)(const char *func)
{

	printf("%*s- %s\n", 2 * --debug_indentation, "", func);
}

void
debug_node(const tnode_t *tn)
{
	op_t op;

	if (tn == NULL) {
		debug_step("null");
		return;
	}

	op = tn->tn_op;
	debug_indent();
	debug_printf("'%s' with type '%s'%s%s",
	    op == CVT && !tn->tn_cast ? "convert" : modtab[op].m_name,
	    type_name(tn->tn_type), tn->tn_lvalue ? ", lvalue" : "",
	    tn->tn_parenthesized ? ", parenthesized" : "");

	if (op == NAME)
		debug_printf(" %s %s\n", tn->tn_sym->s_name,
		    storage_class_name(tn->tn_sym->s_scl));
	else if (op == CON && is_floating(tn->tn_type->t_tspec))
		debug_printf(", value %Lg", tn->tn_val->v_ldbl);
	else if (op == CON && is_uinteger(tn->tn_type->t_tspec))
		debug_printf(", value %llu\n", (unsigned long long)tn->tn_val->v_quad);
	else if (op == CON && is_integer(tn->tn_type->t_tspec))
		debug_printf(", value %lld\n", (long long)tn->tn_val->v_quad);
	else if (op == CON)
		debug_printf(", unknown value\n");
	else if (op == STRING && tn->tn_string->st_tspec == CHAR)
		debug_printf(", length %zu, \"%s\"\n",
		    tn->tn_string->st_len, tn->tn_string->st_cp);
	else if (op == STRING && tn->tn_string->st_tspec == WCHAR) {
		char *s;
		size_t n;
		n = MB_CUR_MAX * (tn->tn_string->st_len + 1);
		s = xmalloc(n);
		(void)wcstombs(s, tn->tn_string->st_wcp, n);
		debug_printf(", length %zu, L\"%s\"",
		    tn->tn_string->st_len, s);
		free(s);

	} else {
		debug_printf("\n");

		debug_indent_inc();
		debug_node(tn->tn_left);
		if (modtab[op].m_binary || tn->tn_right != NULL)
			debug_node(tn->tn_right);
		debug_indent_dec();
	}
}

#endif