From 24e98e38d616f64d68c86747dc38e657145bf38b Mon Sep 17 00:00:00 2001
From: Emmanuele Bassi <ebassi@gnome.org>
Date: Wed, 8 Feb 2017 17:34:23 +0000
Subject: Add a macro for checking approximate values

A macro like this is useful to avoid direct comparisons between floating
point values.

https://gitlab.gnome.org/GNOME/glib/issues/914
---
 glib/gmacros.h | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'glib/gmacros.h')

diff --git a/glib/gmacros.h b/glib/gmacros.h
index 0e180bb09..cfeb9a00b 100644
--- a/glib/gmacros.h
+++ b/glib/gmacros.h
@@ -329,6 +329,9 @@
 #undef	CLAMP
 #define CLAMP(x, low, high)  (((x) > (high)) ? (high) : (((x) < (low)) ? (low) : (x)))
 
+#define G_APPROX_VALUE(a, b, epsilon) \
+  (((a) > (b) ? (a) - (b) : (b) - (a)) < (epsilon))
+
 /* Count the number of elements in an array. The array must be defined
  * as such; using this with a dynamically allocated array will give
  * incorrect results.
-- 
cgit v1.2.1