From 28382505b286a404fdf53bb17720f850d8dfdecc Mon Sep 17 00:00:00 2001
From: Alan Wu <XrXr@users.noreply.github.com>
Date: Tue, 23 Jul 2024 18:27:07 -0400
Subject: Get fixnum_{min,max} from RbConfig::LIMITS when available

It's better than guessing based on the pointer size if the
implementation provides it directly.
---
 spec/mspec/lib/mspec/helpers/numeric.rb | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

(limited to 'spec/mspec/lib')

diff --git a/spec/mspec/lib/mspec/helpers/numeric.rb b/spec/mspec/lib/mspec/helpers/numeric.rb
index 3be3dcdcd1..d877fc9296 100644
--- a/spec/mspec/lib/mspec/helpers/numeric.rb
+++ b/spec/mspec/lib/mspec/helpers/numeric.rb
@@ -31,7 +31,24 @@ end
 # specs based on the relationship between values rather than specific
 # values.
 if PlatformGuard.standard? or PlatformGuard.implementation? :topaz
-  if PlatformGuard.c_long_size? 32
+  limits_available = begin
+    require 'rbconfig/sizeof'
+    defined?(RbConfig::LIMITS.[]) && ['FIXNUM_MAX', 'FIXNUM_MIN'].all? do |key|
+      Integer === RbConfig::LIMITS[key]
+    end
+  rescue LoadError
+    false
+  end
+
+  if limits_available
+    def fixnum_max
+      RbConfig::LIMITS['FIXNUM_MAX']
+    end
+
+    def fixnum_min
+      RbConfig::LIMITS['FIXNUM_MIN']
+    end
+  elsif PlatformGuard.c_long_size? 32
     def fixnum_max
       (2**30) - 1
     end
-- 
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