utils: add locale_workaround

Attempt to work around some locale handling throwing in some systems.

   "locale::facet::_S_create_c_locale name not valid"

Ugly, but maybe it helps.

2 files changed, 26 insertions, 16 deletions

diff --git a/lib/utils/mu-utils.cc b/lib/utils/mu-utils.cc
index 0cc34a5..28abc43 100644
--- a/lib/utils/mu-utils.cc
+++ b/lib/utils/mu-utils.cc
@@ -19,6 +19,7 @@
 
 #ifndef _XOPEN_SOURCE
 #define _XOPEN_SOURCE
+#include <stdexcept>
 #endif /*_XOPEN_SOURCE*/
 
 #include <array>
@@ -606,3 +607,21 @@ Mu::TempDir::~TempDir()
 
 	g_debug("removed '%s'", path_.c_str());
 }
+
+bool
+Mu::locale_workaround()
+{
+	// quite horrible... but some systems break otherwise with
+	//  https://github.com/djcb/mu/issues/2252
+
+	for (auto&& loc : {"", "en_US.UTF-8", "C" }) {
+		try {
+			std::locale::global(std::locale(loc));
+			return true;
+		} catch (const std::runtime_error& re) {
+			continue;
+		}
+	}
+
+	return false;
+}
diff --git a/lib/utils/mu-utils.hh b/lib/utils/mu-utils.hh
index 95d6d82..8018a49 100644
--- a/lib/utils/mu-utils.hh
+++ b/lib/utils/mu-utils.hh
@@ -147,22 +147,13 @@ std::string date_to_time_t_string(int64_t t);
 std::string time_to_string(const std::string& frm, time_t t, bool utc = false) G_GNUC_CONST;
 
 
-// /**
-//  * Create a std::string by consuming a gchar* array; this takes ownership
-//  * of str which should no longer be used.
-//  *
-//  * @param str a gchar* or NULL (latter taken as "")
-//  *
-//  * @return a std::string
-//  */
-// static inline std::string
-// from_gchars(gchar*&& str)
-// {
-//	std::string s{str ? str : ""};
-//	g_free(str);
-
-//	return s;
-// }
+/**
+ * Hack to avoid locale crashes
+ *
+ * @return true if setting locale worked; false otherwise
+ */
+bool locale_workaround();
+
 
 // https://stackoverflow.com/questions/19053351/how-do-i-use-a-custom-deleter-with-a-stdunique-ptr-member
 template <auto fn>