1 files changed, 31 insertions, 1 deletions
diff --git a/asciidoc/__init__.py b/asciidoc/__init__.py
index 884b29e..0e30eda 100644
--- a/asciidoc/__init__.py
+++ b/asciidoc/__init__.py
@@ -3,7 +3,37 @@
 import sys
 from .__metadata__ import VERSION, __version__
 
-__all__ = ['VERSION', '__version__']
+__all__ = [
+    'VERSION',
+    '__version__',
+    'set_legacy_compat',
+    'set_future_compat',
+    'set_compat_mode',
+    'get_compat_mode',
+]
+
+COMPAT_MODE = 1
+
+
+def set_legacy_compat() -> None:
+    set_compat_mode(1)
+
+
+def set_future_compat() -> None:
+    set_compat_mode(2)
+
+
+def set_compat_mode(mode: int) -> None:
+    if mode < 1 or mode > 2:
+        raise ValueError('compat mode must be 1 <= mode <= 2')
+
+    global COMPAT_MODE
+    COMPAT_MODE = mode
+
+
+def get_compat_mode() -> int:
+    return COMPAT_MODE
+
 
 # If running as a script, we avoid these imports to avoid a circular
 # RuntimeWarning, which is fine as we don't use them in that case.