Swallow Whole and Grappling - Weapon In Hand?

[Dracarius]

I'm studying for a new adventure I'm creating, and one of the creatures has the swallow whole ability.

The question I have is this: If your grappled by said creature if it succeeds at it's swallow whole. Can you reach for a light weapon, or does that weapon already have to be in hand at the time of the grapple/swallow whole?

I see two sides to this:

If you have a weapon in hand, assuming you don't drop it, your good to go.

or

Per the grapple feat you can't "move" so would this prevent a character from grabbing a weapon?

What if the weapon is right near your hand, etc.

Thoughts on this?

[Caderyn]

Move is in relation to taking a move action or 5 foot step to change what square you are currently in, this is restricted in that it can only be done as part of a grapple check if you are in control of the grapple.

You are allowed to perform any action you could take with 1 hand, which would involve drawing a light or one handed weapon