2 * Copyright (c) 2007-2009, Novell Inc.
4 * This program is licensed under the BSD license, read LICENSE.BSD
5 * for further information
13 #ifndef SATSOLVER_RULES_H
14 #define SATSOLVER_RULES_H
20 /* ----------------------------------------------
23 * providerN(B) == Package Id of package providing tag B
24 * N = 1, 2, 3, in case of multiple providers
26 * A requires B : !A | provider1(B) | provider2(B)
28 * A conflicts B : (!A | !provider1(B)) & (!A | !provider2(B)) ...
30 * 'not' is encoded as a negative Id
32 * Binary rule: p = first literal, d = 0, w2 = second literal, w1 = p
34 * There are a lot of rules, so the struct is kept as small as
35 * possible. Do not add new members unless there is no other way.
38 typedef struct _Rule {
39 Id p; /* first literal in rule */
40 Id d; /* Id offset into 'list of providers terminated by 0' as used by whatprovides; pool->whatprovides + d */
41 /* in case of binary rules, d == 0, w1 == p, w2 == other literal */
42 /* in case of disabled rules: ~d, aka -d - 1 */
43 Id w1, w2; /* watches, literals not-yet-decided */
44 /* if !w2, assertion, not rule */
45 Id n1, n2; /* next rules in linked list, corresponding to w1, w2 */
50 SOLVER_RULE_UNKNOWN = 0,
51 SOLVER_RULE_RPM = 0x100,
52 SOLVER_RULE_RPM_NOT_INSTALLABLE,
53 SOLVER_RULE_RPM_NOTHING_PROVIDES_DEP,
54 SOLVER_RULE_RPM_PACKAGE_REQUIRES,
55 SOLVER_RULE_RPM_SELF_CONFLICT,
56 SOLVER_RULE_RPM_PACKAGE_CONFLICT,
57 SOLVER_RULE_RPM_SAME_NAME,
58 SOLVER_RULE_RPM_PACKAGE_OBSOLETES,
59 SOLVER_RULE_RPM_IMPLICIT_OBSOLETES,
60 SOLVER_RULE_UPDATE = 0x200,
61 SOLVER_RULE_FEATURE = 0x300,
62 SOLVER_RULE_JOB = 0x400,
63 SOLVER_RULE_JOB_NOTHING_PROVIDES_DEP,
64 SOLVER_RULE_DISTUPGRADE = 0x500,
65 SOLVER_RULE_INFARCH = 0x600,
66 SOLVER_RULE_CHOICE = 0x700,
67 SOLVER_RULE_LEARNT = 0x800
70 #define SOLVER_RULE_TYPEMASK 0xff00
74 /*-------------------------------------------------------------------
79 solver_disablerule(struct _Solver *solv, Rule *r)
85 /*-------------------------------------------------------------------
90 solver_enablerule(struct _Solver *solv, Rule *r)
96 Rule *solver_addrule(struct _Solver *solv, Id p, Id d);
97 void solver_unifyrules(struct _Solver *solv);
98 int solver_samerule(struct _Solver *solv, Rule *r1, Rule *r2);
101 void solver_addrpmrulesforsolvable(struct _Solver *solv, Solvable *s, Map *m);
102 void solver_addrpmrulesforweak(struct _Solver *solv, Map *m);
103 void solver_addrpmrulesforupdaters(struct _Solver *solv, Solvable *s, Map *m, int allow_all);
105 /* update/feature rules */
106 void solver_addupdaterule(struct _Solver *solv, Solvable *s, int allow_all);
109 void solver_addinfarchrules(struct _Solver *solv, Map *addedmap);
112 void solver_createdupmaps(struct _Solver *solv);
113 void solver_freedupmaps(struct _Solver *solv);
114 void solver_addduprules(struct _Solver *solv, Map *addedmap);
116 /* policy rule disabling/reenabling */
117 void solver_disablepolicyrules(struct _Solver *solv);
118 void solver_reenablepolicyrules(struct _Solver *solv, int jobidx);
121 int solver_allruleinfos(struct _Solver *solv, Id rid, Queue *rq);
122 SolverRuleinfo solver_ruleinfo(struct _Solver *solv, Id rid, Id *fromp, Id *top, Id *depp);