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debug.c revision 1.1 
      1 /* $NetBSD: debug.c,v 1.1 2021/07/31 18:16:42 rillig Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2021 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Roland Illig <rillig (at) NetBSD.org>.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #if HAVE_NBTOOL_CONFIG_H
     33 #include "nbtool_config.h"
     34 #endif
     35 
     36 #include <sys/cdefs.h>
     37 #if defined(__RCSID) && !defined(lint)
     38 __RCSID("$NetBSD: debug.c,v 1.1 2021/07/31 18:16:42 rillig Exp $");
     39 #endif
     40 
     41 #include "lint1.h"
     42 
     43 
     44 #ifdef DEBUG
     45 
     46 static int debug_indentation = 0;
     47 
     48 
     49 void __printflike(1, 2)
     50 debug_printf(const char *fmt, ...)
     51 {
     52 	va_list va;
     53 
     54 	va_start(va, fmt);
     55 	vfprintf(stdout, fmt, va);
     56 	va_end(va);
     57 }
     58 
     59 void
     60 debug_indent(void)
     61 {
     62 
     63 	debug_printf("%*s", 2 * debug_indentation, "");
     64 }
     65 
     66 void
     67 debug_indent_inc(void)
     68 {
     69 
     70 	debug_indentation++;
     71 }
     72 
     73 void
     74 debug_indent_dec(void)
     75 {
     76 
     77 	debug_indentation--;
     78 }
     79 
     80 void
     81 (debug_enter)(const char *func)
     82 {
     83 
     84 	printf("%*s+ %s\n", 2 * debug_indentation++, "", func);
     85 }
     86 
     87 void __printflike(1, 2)
     88 debug_step(const char *fmt, ...)
     89 {
     90 	va_list va;
     91 
     92 	debug_indent();
     93 	va_start(va, fmt);
     94 	vfprintf(stdout, fmt, va);
     95 	va_end(va);
     96 	printf("\n");
     97 }
     98 
     99 void
    100 (debug_leave)(const char *func)
    101 {
    102 
    103 	printf("%*s- %s\n", 2 * --debug_indentation, "", func);
    104 }
    105 
    106 void
    107 debug_node(const tnode_t *tn, int indent)
    108 {
    109 	op_t op;
    110 
    111 	if (tn == NULL) {
    112 		printf("%*s" "null\n", indent, "");
    113 		return;
    114 	}
    115 
    116 	op = tn->tn_op;
    117 	printf("%*s%s with type '%s'%s%s",
    118 	    2 * indent, "",
    119 	    op == CVT && !tn->tn_cast ? "convert" : modtab[op].m_name,
    120 	    type_name(tn->tn_type), tn->tn_lvalue ? ", lvalue" : "",
    121 	    tn->tn_parenthesized ? ", parenthesized" : "");
    122 
    123 	if (op == NAME)
    124 		printf(" %s\n", tn->tn_sym->s_name);
    125 	else if (op == CON && is_floating(tn->tn_type->t_tspec))
    126 		printf(", value %Lg", tn->tn_val->v_ldbl);
    127 	else if (op == CON && is_uinteger(tn->tn_type->t_tspec))
    128 		printf(", value %llu\n", (unsigned long long)tn->tn_val->v_quad);
    129 	else if (op == CON && is_integer(tn->tn_type->t_tspec))
    130 		printf(", value %lld\n", (long long)tn->tn_val->v_quad);
    131 	else if (op == CON)
    132 		printf(", unknown value\n");
    133 	else if (op == STRING)
    134 		printf(", length %zu\n", tn->tn_string->st_len);
    135 	else {
    136 		printf("\n");
    137 
    138 		debug_node(tn->tn_left, indent + 1);
    139 		if (modtab[op].m_binary || tn->tn_right != NULL)
    140 			debug_node(tn->tn_right, indent + 1);
    141 	}
    142 }
    143 
    144 #endif
    145