From c18935d8051e89da09a9a3135d4e39d0d9ae3d79 Mon Sep 17 00:00:00 2001
From: Gilles Vollant <info@winimage.com>
Date: Sat, 22 Jan 2022 15:47:04 +0100
Subject: [PATCH] Fix pugixml float parsing local dependency
 https://github.com/zeux/pugixml/issues/469
 https://github.com/troldal/OpenXLSX/issues/133

---
 OpenXLSX/external/pugixml/pugixml.cpp | 29 ++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/OpenXLSX/external/pugixml/pugixml.cpp b/OpenXLSX/external/pugixml/pugixml.cpp
index 11733a13..62b65593 100644
--- a/OpenXLSX/external/pugixml/pugixml.cpp
+++ b/OpenXLSX/external/pugixml/pugixml.cpp
@@ -22,6 +22,15 @@
 #include <assert.h>
 #include <limits.h>
 
+#if (!defined(PUGIXML_HAS_CXX17)) && ((__cplusplus >= 201703L) || \
+     (defined(_MSC_VER) && _MSC_VER >= 1911 && _MSVC_LANG >= 201703L))
+#	define PUGIXML_HAS_CXX17
+#endif
+
+#if defined(PUGIXML_HAS_CXX17)
+#	include <charconv>
+#endif
+
 #ifdef PUGIXML_WCHAR_MODE
 #	include <wchar.h>
 #endif
@@ -4591,7 +4600,13 @@ class xml_buffered_writer
 	#ifdef PUGIXML_WCHAR_MODE
 	    return wcstod(value, 0);
 	#else
+        #if defined(PUGIXML_HAS_CXX17)
+                double result_double = 0.0;
+                std::from_chars(value, (value + strlen(value)), result_double);
+                return result_double;
+        #else
 	        return strtod(value, 0);
+        #endif
 	#endif
 	    }
 
@@ -4600,7 +4615,13 @@ class xml_buffered_writer
 	#ifdef PUGIXML_WCHAR_MODE
 	    return static_cast<float>(wcstod(value, 0));
 	#else
+        #if defined(PUGIXML_HAS_CXX17)
+                double result_double = 0.0;
+                std::from_chars(value, value + strlen(value), result_double);
+                return static_cast<float>(result_double);
+        #else
 	        return static_cast<float>(strtod(value, 0));
+        #endif
 	#endif
 	    }
 
@@ -8415,7 +8436,13 @@ PUGI__FN double convert_string_to_number(const char_t* string)
 	#ifdef PUGIXML_WCHAR_MODE
 	return wcstod(string, 0);
 	#else
-	return strtod(string, 0);
+        #if defined(PUGIXML_HAS_CXX17)
+            double result_double = 0.0;
+            std::from_chars(string, string + strlen(string), result_double);
+            return static_cast<float>(result_double);
+        #else
+	        return strtod(string, 0);
+        #endif
 	#endif
 }