read-footer ( -- footer-offset footer.32/footer.64/f )

Vocabulary

tools.image

Inputs

None

Outputs

footer-offset	an integer
footer.32/footer.64/f	an embedded-image-footer

Word description

Read footer if it exists, return f otherwise

Definition

USING: classes.struct kernel math ;

IN: tools.image

: read-footer ( -- footer-offset footer.32/footer.64/f )
    read-union-footer valid-image-footer?
    [ embedded-image-footer.union struct-size + f ] unless* ;