Sanitize the registered function interface.

Expand the characters which are legal in a function name, and check
the name for validity.  Create a type for the function pointer.
Convert the last argument from a boolean to flags, to allow for expansion.

1 files changed, 2 insertions, 0 deletions

diff --git a/makeint.h b/makeint.h
index f48c087..3e22296 100644
--- a/makeint.h
+++ b/makeint.h
@@ -396,6 +396,8 @@ extern int unixy_shell;
 #define MAP_DOT         0x0200
 #define MAP_COMMA       0x0400
 
+/* These are the valid characters for a user-defined function.  */
+#define MAP_USERFUNC    0x2000
 /* This means not only a '$', but skip the variable reference.  */
 #define MAP_VARIABLE    0x4000
 /* The set of characters which are path separators is OS-specific.  */