From a154ea0c91b64cd7fb4d56e7ea6840488a68cb1d Mon Sep 17 00:00:00 2001
From: Kevin Newton <kddnewton@gmail.com>
Date: Thu, 22 Feb 2024 21:22:56 -0500
Subject: [PATCH] [ruby/prism] Ignore other ERANGE errors for floats

https://github.com/ruby/prism/commit/4267161ca7
---
 prism/defines.h | 12 ++++++++++++
 prism/prism.c   |  4 ++--
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/prism/defines.h b/prism/defines.h
index 0abfa86e66..6c09f108c2 100644
--- a/prism/defines.h
+++ b/prism/defines.h
@@ -10,6 +10,7 @@
 #define PRISM_DEFINES_H
 
 #include <ctype.h>
+#include <math.h>
 #include <stdarg.h>
 #include <stddef.h>
 #include <stdint.h>
@@ -113,4 +114,15 @@
 #   endif
 #endif
 
+/**
+ * isinf on Windows is defined as accepting a float, but on POSIX systems it
+ * accepts a float, a double, or a long double. We want to mirror this behavior
+ * on windows.
+ */
+#ifdef _WIN32
+#   include <float.h>
+#   undef isinf
+#   define isinf(x) (sizeof(x) == sizeof(float) ? !_finitef(x) : !_finite(x))
+#endif
+
 #endif
diff --git a/prism/prism.c b/prism/prism.c
index 4f268fc952..afd7969ae1 100644
--- a/prism/prism.c
+++ b/prism/prism.c
@@ -3181,7 +3181,7 @@ pm_double_parse(pm_parser_t *parser, const pm_token_t *token) {
 
     // If errno is set, then it should only be ERANGE. At this point we need to
     // check if it's infinity (it should be).
-    if (errno == ERANGE) {
+    if (errno == ERANGE && isinf(value)) {
         int warn_width;
         const char *ellipsis;
 
@@ -3194,7 +3194,7 @@ pm_double_parse(pm_parser_t *parser, const pm_token_t *token) {
         }
 
         pm_diagnostic_list_append_format(&parser->warning_list, token->start, token->end, PM_WARN_FLOAT_OUT_OF_RANGE, warn_width, (const char *) token->start, ellipsis);
-        value = (value < 0x0) ? -HUGE_VAL : HUGE_VAL;
+        value = (value < 0.0) ? -HUGE_VAL : HUGE_VAL;
     }
 
     // Finally we can free the buffer and return the value.