[memfile] Add support for faking files in memory

src/main/util/str.c

@@ -250,3 +250,12 @@ bool wstr_eq(const wchar_t *lhs, const wchar_t *rhs)
         return wcscmp(lhs, rhs) == 0;
     }
 }
+
+bool wstr_insensitive_eq(const wchar_t *lhs, const wchar_t *rhs)
+{
+    if (lhs == NULL || rhs == NULL) {
+        return lhs == rhs;
+    } else {
+        return _wcsicmp(lhs, rhs) == 0;
+    }
+}

src/main/util/str.h

@@ -21,6 +21,7 @@ void wstr_cpy(wchar_t *dest, size_t dnchars, const wchar_t *src);
 wchar_t *wstr_dup(const wchar_t *src);
 bool wstr_ends_with(const wchar_t *haystack, const wchar_t *needle);
 bool wstr_eq(const wchar_t *lhs, const wchar_t *rhs);
+bool wstr_insensitive_eq(const wchar_t *lhs, const wchar_t *rhs);
 size_t wstr_format(wchar_t *buf, size_t nchars, const wchar_t *fmt, ...);
 bool wstr_narrow(const wchar_t *src, char **dest);
 size_t