From ec249526ef406db942067c274415d17fb923c2cc Mon Sep 17 00:00:00 2001
From: Patrick McDermott <pj@pehjota.net>
Date: Wed, 25 Oct 2017 12:36:41 -0400
Subject: MqTree: Fix width of pointers in debugging output

And modify configure.ac to search for logl() and add -lm to LIBS.
---
diff --git a/configure.ac b/configure.ac
index 9d82351..e6ff630 100644
--- a/configure.ac
+++ b/configure.ac
@@ -69,6 +69,8 @@ AC_ARG_ENABLE(
 	[enable_debug=no])
 
 if test "x${enable_debug}" = 'xyes'; then
+	AC_SEARCH_LIBS([logl], [m], [],
+		[AC_MSG_ERROR([unable to find the logl() function])])
 	AC_DEFINE([MQ_TREE_DEBUG], [1], [Define to 1 to enable tree debugging.])
 else
 	AC_DEFINE([MQ_TREE_DEBUG], [0], [Define to 1 to enable tree debugging.])
diff --git a/src/tree.c b/src/tree.c
index 61db6f6..1363098 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -31,6 +31,10 @@
 
 #if MQ_TREE_DEBUG
 
+#include <math.h>
+
+#define PRIWxPTR ((int) (logl(UINTPTR_MAX) / logl(16)))
+
 static void
 debug_print_tree_recurse(MqTree *node, gsize indent)
 {
@@ -40,15 +44,16 @@ debug_print_tree_recurse(MqTree *node, gsize indent)
 		for (i = 0; i < indent; ++i) {
 			g_print("\t");
 		}
-		g_print("\t0x%" PRIxPTR " (size %d, position %d, "
-			"parent 0x%" PRIxPTR ", "
-			"siblings 0x%" PRIxPTR " and 0x%" PRIxPTR ", "
-			"children 0x%" PRIxPTR " to 0x%" PRIxPTR ")\n",
-			(uintptr_t) node, node->size, node->position,
-			(uintptr_t) node->parent,
-			(uintptr_t) node->prev, (uintptr_t) node->next,
-			(uintptr_t) node->first_child,
-			(uintptr_t) node->last_child);
+		g_print("\t0x%0*" PRIxPTR " (size %d, position %d, "
+			"parent 0x%0*" PRIxPTR ", "
+			"siblings 0x%0*" PRIxPTR " and 0x%0*" PRIxPTR ", "
+			"children 0x%0*" PRIxPTR " to 0x%0*" PRIxPTR ")\n",
+			PRIWxPTR, (uintptr_t) node, node->size, node->position,
+			PRIWxPTR, (uintptr_t) node->parent,
+			PRIWxPTR, (uintptr_t) node->prev,
+			PRIWxPTR, (uintptr_t) node->next,
+			PRIWxPTR, (uintptr_t) node->first_child,
+			PRIWxPTR, (uintptr_t) node->last_child);
 
 		if (node->first_child) {
 			debug_print_tree_recurse(node->first_child, indent + 1);
@@ -59,7 +64,7 @@ debug_print_tree_recurse(MqTree *node, gsize indent)
 static void
 debug_print_tree(const gchar *msg, MqTree *node)
 {
-	g_print("%s 0x%" PRIxPTR ", ", msg, (uintptr_t) node);
+	g_print("%s 0x%0*" PRIxPTR ", ", msg, PRIWxPTR, (uintptr_t) node);
 	node = node->root;
 	g_print("new tree (size %d):\n", node->size);
 	debug_print_tree_recurse(node, 0);
@@ -68,13 +73,14 @@ debug_print_tree(const gchar *msg, MqTree *node)
 static void
 debug_print_node(MqTree *node)
 {
-	g_print("\t0x%" PRIxPTR "\n", (uintptr_t) node);
+	g_print("\t0x%0*" PRIxPTR "\n", PRIWxPTR, (uintptr_t) node);
 }
 
 static void
 debug_print_head(const gchar *head, MqTree *node)
 {
-	g_print("%s, starting at 0x%" PRIxPTR "\n", head, (uintptr_t) node);
+	g_print("%s, starting at 0x%0*" PRIxPTR "\n",
+		head, PRIWxPTR, (uintptr_t) node);
 }
 
 #else  /* MQ_TREE_DEBUG */
--
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