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* add rule * p = direct literal; always < 0 for installed rpm rules * d, if < 0 direct literal, if > 0 offset into whatprovides, if == 0 rule is assertion (look at p only) * * * A requires b, b provided by B1,B2,B3 => (-A|B1|B2|B3) * * p < 0 : pkg id of A * d > 0 : Offset in whatprovidesdata (list of providers of b) * * A conflicts b, b provided by B1,B2,B3 => (-A|-B1), (-A|-B2), (-A|-B3) * p < 0 : pkg id of A * d < 0 : Id of solvable (e.g. B1) * * d == 0: unary rule, assertion => (A) or (-A) * * Install: p > 0, d = 0 (A) user requested install * Remove: p < 0, d = 0 (-A) user requested remove (also: uninstallable) * Requires: p < 0, d > 0 (-A|B1|B2|...) d: <list of providers for requirement of p> * Updates: p > 0, d > 0 (A|B1|B2|...) d: <list of updates for solvable p> * Conflicts: p < 0, d < 0 (-A|-B) either p (conflict issuer) or d (conflict provider) (binary rule) * also used for obsoletes * ?: p > 0, d < 0 (A|-B) * No-op ?: p = 0, d = 0 (null) (used as policy rule placeholder) * * resulting watches: * ------------------ * Direct assertion (no watch needed)( if d <0 ) --> d = 0, w1 = p, w2 = 0 * Binary rule: p = first literal, d = 0, w2 = second literal, w1 = p * every other : w1 = p, w2 = whatprovidesdata[d]; * Disabled rule: w1 = 0 * * always returns a rule for non-rpm rules p > 0, d = 0, (A), w1 = p, w2 = 0 p < 0, d = 0, (-A), w1 = p, w2 = 0 p !=0, d = 0, (p|q), w1 = p, w2 = q