2 * Copyright (c) 2007, Novell Inc.
4 * This program is licensed under the BSD license, read LICENSE.BSD
5 * for further information
13 #ifndef SATSOLVER_SOLVER_H
14 #define SATSOLVER_SOLVER_H
16 #include "pooltypes.h"
22 /* ----------------------------------------------
25 * providerN(B) == Package Id of package providing tag B
26 * N = 1, 2, 3, in case of multiple providers
28 * A requires B : !A | provider1(B) | provider2(B)
30 * A conflicts B : (!A | !provider1(B)) & (!A | !provider2(B)) ...
32 * 'not' is encoded as a negative Id
34 * Binary rule: p = first literal, d = 0, w2 = second literal, w1 = p
38 Id p; /* first literal in rule */
39 Id d; /* Id offset into 'list of providers terminated by 0' as used by whatprovides; pool->whatprovides + d */
40 /* in case of binary rules, d == 0, w1 == p, w2 == other literal */
41 Id w1, w2; /* watches, literals not-yet-decided */
42 /* if !w1, disabled */
43 /* if !w2, assertion, not rule */
44 Id n1, n2; /* next rules in linked list, corresponding to w1,w2 */
49 typedef struct solver {
53 int fixsystem; /* repair errors in rpm dependency graph */
54 int allowdowngrade; /* allow to downgrade installed solvable */
55 int allowarchchange; /* allow to change architecture of installed solvables */
56 int allowvendorchange; /* allow to change vendor of installed solvables */
57 int allowuninstall; /* allow removal of installed solvables */
58 int updatesystem; /* distupgrade */
59 int allowvirtualconflicts; /* false: conflicts on package name, true: conflicts on package provides */
60 int noupdateprovide; /* true: update packages needs not to provide old package */
62 Rule *rules; /* all rules */
63 Id nrules; /* rpm rules */
65 Id jobrules; /* user rules */
66 Id systemrules; /* policy rules, e.g. keep packages installed or update. All literals > 0 */
67 Id weakrules; /* rules that can be autodisabled */
68 Id learntrules; /* learnt rules */
70 Id *weaksystemrules; /* please try to install (r->d) */
71 Map noupdate; /* don't try to update these
72 installed solvables */
74 Id *watches; /* Array of rule offsets
75 * watches has nsolvables*2 entries and is addressed from the middle
76 * middle-solvable : decision to conflict, offset point to linked-list of rules
77 * middle+solvable : decision to install: offset point to linked-list of rules
84 Queue decisionq_why; /* index of rule, Offset into rules */
85 Id *decisionmap; /* map for all available solvables, > 0: level of decision when installed, < 0 level of decision when conflict */
87 /* learnt rule history */
92 int (*solution_callback)(struct solver *solv, void *data);
93 void *solution_callback_data;
98 Queue suggestions; /* suggested packages */
100 Map recommendsmap; /* recommended packages from decisionmap */
101 Map suggestsmap; /* suggested packages from decisionmap */
102 int recommends_index; /* recommended level */
104 Id *obsoletes; /* obsoletes for each installed solvable */
105 Id *obsoletes_data; /* data area for obsoletes */
115 SOLVER_INSTALL_SOLVABLE,
116 SOLVER_ERASE_SOLVABLE,
117 SOLVER_INSTALL_SOLVABLE_NAME,
118 SOLVER_ERASE_SOLVABLE_NAME,
119 SOLVER_INSTALL_SOLVABLE_PROVIDES,
120 SOLVER_ERASE_SOLVABLE_PROVIDES,
121 SOLVER_INSTALL_SOLVABLE_UPDATE
124 extern Solver *solver_create(Pool *pool, Repo *installed);
125 extern void solver_free(Solver *solv);
126 extern void solver_solve(Solver *solv, Queue *job);
127 extern int solver_dep_installed(Solver *solv, Id dep);
129 extern Id solver_next_problem(Solver *solv, Id problem);
130 extern Id solver_next_solution(Solver *solv, Id problem, Id solution);
131 extern Id solver_next_solutionelement(Solver *solv, Id problem, Id solution, Id element, Id *p, Id *rp);
133 /* debug functions, do not use */
134 void printdecisions(Solver *solv);
135 void printsolutions(Solver *solv, Queue *job);
139 solver_dep_fulfilled(Solver *solv, Id dep)
141 Pool *pool = solv->pool;
146 Reldep *rd = GETRELDEP(pool, dep);
147 if (rd->flags == REL_AND)
149 if (!solver_dep_fulfilled(solv, rd->name))
151 return solver_dep_fulfilled(solv, rd->evr);
153 if (rd->flags == REL_NAMESPACE && rd->name == NAMESPACE_INSTALLED)
154 return solver_dep_installed(solv, rd->evr);
156 FOR_PROVIDES(p, pp, dep)
158 if (solv->decisionmap[p] > 0)
165 solver_is_supplementing(Solver *solv, Solvable *s)
168 if (!s->supplements && !s->freshens)
172 supp = s->repo->idarraydata + s->supplements;
173 while ((sup = *supp++) != 0)
174 if (solver_dep_fulfilled(solv, sup))
181 supp = s->repo->idarraydata + s->freshens;
182 while ((sup = *supp++) != 0)
183 if (solver_dep_fulfilled(solv, sup))
192 solver_is_enhancing(Solver *solv, Solvable *s)
197 enhp = s->repo->idarraydata + s->enhances;
198 while ((enh = *enhp++) != 0)
199 if (solver_dep_fulfilled(solv, enh))
204 #endif /* SATSOLVER_SOLVER_H */