Locale (macOS): queries system-wide locale preference

src/detection/locale/locale_apple.c

@@ -0,0 +1,13 @@
+#include "detection/locale/locale.h"
+#include "common/apple/cf_helpers.h"
+
+const char* ffDetectLocale(FFstrbuf* result) {
+    // Read the system-wide locale preference (equivalent to `defaults read -g AppleLocale`),
+    // which is NOT affected by user environment variables (LANG, LC_ALL, etc.)
+    FF_CFTYPE_AUTO_RELEASE CFStringRef appleLocale = CFPreferencesCopyAppValue(CFSTR("AppleLocale"), kCFPreferencesAnyApplication);
+    if (!appleLocale) {
+        return "Failed to read AppleLocale";
+    }
+
+    return ffCfStrGetString(appleLocale, result);
+}