src/rules.h

   1 /*
   2  * Copyright (c) 2007-2009, Novell Inc.
   3  *
   4  * This program is licensed under the BSD license, read LICENSE.BSD
   5  * for further information
   6  */
   7
   8 /*
   9  * rules.h
  10  *
  11  */
  12
  13 #ifndef LIBSOLV_RULES_H
  14 #define LIBSOLV_RULES_H
  15
  16 #ifdef __cplusplus
  17 extern "C" {
  18 #endif
  19
  20 /* ----------------------------------------------
  21  * Rule
  22  *
  23  *   providerN(B) == Package Id of package providing tag B
  24  *   N = 1, 2, 3, in case of multiple providers
  25  *
  26  * A requires B : !A | provider1(B) | provider2(B)
  27  *
  28  * A conflicts B : (!A | !provider1(B)) & (!A | !provider2(B)) ...
  29  *
  30  * 'not' is encoded as a negative Id
  31  *
  32  * Binary rule: p = first literal, d = 0, w2 = second literal, w1 = p
  33  *
  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.
  36  */
  37
  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 */
  46 } Rule;
  47
  48
  49 typedef enum {
  50   SOLVER_RULE_UNKNOWN = 0,
  51   SOLVER_RULE_PKG = 0x100,
  52   SOLVER_RULE_PKG_NOT_INSTALLABLE,
  53   SOLVER_RULE_PKG_NOTHING_PROVIDES_DEP,
  54   SOLVER_RULE_PKG_REQUIRES,
  55   SOLVER_RULE_PKG_SELF_CONFLICT,
  56   SOLVER_RULE_PKG_CONFLICTS,
  57   SOLVER_RULE_PKG_SAME_NAME,
  58   SOLVER_RULE_PKG_OBSOLETES,
  59   SOLVER_RULE_PKG_IMPLICIT_OBSOLETES,
  60   SOLVER_RULE_PKG_INSTALLED_OBSOLETES,
  61   SOLVER_RULE_UPDATE = 0x200,
  62   SOLVER_RULE_FEATURE = 0x300,
  63   SOLVER_RULE_JOB = 0x400,
  64   SOLVER_RULE_JOB_NOTHING_PROVIDES_DEP,
  65   SOLVER_RULE_JOB_PROVIDED_BY_SYSTEM,
  66   SOLVER_RULE_JOB_UNKNOWN_PACKAGE,
  67   SOLVER_RULE_JOB_UNSUPPORTED,
  68   SOLVER_RULE_DISTUPGRADE = 0x500,
  69   SOLVER_RULE_INFARCH = 0x600,
  70   SOLVER_RULE_CHOICE = 0x700,
  71   SOLVER_RULE_LEARNT = 0x800,
  72   SOLVER_RULE_BEST = 0x900,
  73   SOLVER_RULE_YUMOBS = 0xa00
  74 } SolverRuleinfo;
  75
  76 #define SOLVER_RULE_TYPEMASK    0xff00
  77
  78 struct _Solver;
  79
  80 /*-------------------------------------------------------------------
  81  * disable rule
  82  */
  83
  84 static inline void
  85 solver_disablerule(struct _Solver *solv, Rule *r)
  86 {
  87   if (r->d >= 0)
  88     r->d = -r->d - 1;
  89 }
  90
  91 /*-------------------------------------------------------------------
  92  * enable rule
  93  */
  94
  95 static inline void
  96 solver_enablerule(struct _Solver *solv, Rule *r)
  97 {
  98   if (r->d < 0)
  99     r->d = -r->d - 1;
 100 }
 101
 102 extern Rule *solver_addrule(struct _Solver *solv, Id p, Id d);
 103 extern void solver_unifyrules(struct _Solver *solv);
 104 extern int solver_rulecmp(struct _Solver *solv, Rule *r1, Rule *r2);
 105 extern void solver_shrinkrules(struct _Solver *solv, int nrules);
 106
 107 /* pkg rules */
 108 extern void solver_addpkgrulesforsolvable(struct _Solver *solv, Solvable *s, Map *m);
 109 extern void solver_addpkgrulesforweak(struct _Solver *solv, Map *m);
 110 extern void solver_addpkgrulesforlinked(struct _Solver *solv, Map *m);
 111 extern void solver_addpkgrulesforupdaters(struct _Solver *solv, Solvable *s, Map *m, int allow_all);
 112
 113 /* update/feature rules */
 114 extern void solver_addupdaterule(struct _Solver *solv, Solvable *s, int allow_all);
 115
 116 /* infarch rules */
 117 extern void solver_addinfarchrules(struct _Solver *solv, Map *addedmap);
 118
 119 /* dup rules */
 120 extern void solver_createdupmaps(struct _Solver *solv);
 121 extern void solver_freedupmaps(struct _Solver *solv);
 122 extern void solver_addduprules(struct _Solver *solv, Map *addedmap);
 123
 124 /* choice rules */
 125 extern void solver_addchoicerules(struct _Solver *solv);
 126 extern void solver_disablechoicerules(struct _Solver *solv, Rule *r);
 127
 128 /* best rules */
 129 extern void solver_addbestrules(struct _Solver *solv, int havebestinstalljobs);
 130
 131 /* yumobs rules */
 132 extern void solver_addyumobsrules(struct _Solver *solv);
 133
 134 /* policy rule disabling/reenabling */
 135 extern void solver_disablepolicyrules(struct _Solver *solv);
 136 extern void solver_reenablepolicyrules(struct _Solver *solv, int jobidx);
 137 extern void solver_reenablepolicyrules_cleandeps(struct _Solver *solv, Id pkg);
 138
 139 /* rule info */
 140 extern int solver_allruleinfos(struct _Solver *solv, Id rid, Queue *rq);
 141 extern SolverRuleinfo solver_ruleinfo(struct _Solver *solv, Id rid, Id *fromp, Id *top, Id *depp);
 142 extern SolverRuleinfo solver_ruleclass(struct _Solver *solv, Id rid);
 143 extern void solver_ruleliterals(struct _Solver *solv, Id rid, Queue *q);
 144 extern int  solver_rule2jobidx(struct _Solver *solv, Id rid);
 145 extern Id   solver_rule2job(struct _Solver *solv, Id rid, Id *whatp);
 146 extern Id   solver_rule2solvable(struct _Solver *solv, Id rid);
 147 extern void solver_rule2rules(struct _Solver *solv, Id rid, Queue *q, int recursive);
 148
 149 /* orphan handling */
 150 extern void solver_breakorphans(struct _Solver *solv);
 151 extern void solver_check_brokenorphanrules(struct _Solver *solv, Queue *dq);
 152
 153
 154 /* legacy */
 155 #define SOLVER_RULE_RPM SOLVER_RULE_PKG
 156 #define SOLVER_RULE_RPM_NOT_INSTALLABLE SOLVER_RULE_PKG_NOT_INSTALLABLE
 157 #define SOLVER_RULE_RPM_NOTHING_PROVIDES_DEP SOLVER_RULE_PKG_NOTHING_PROVIDES_DEP
 158 #define SOLVER_RULE_RPM_PACKAGE_REQUIRES SOLVER_RULE_PKG_REQUIRES
 159 #define SOLVER_RULE_RPM_SELF_CONFLICT SOLVER_RULE_PKG_SELF_CONFLICT
 160 #define SOLVER_RULE_RPM_PACKAGE_CONFLICT SOLVER_RULE_PKG_CONFLICTS
 161 #define SOLVER_RULE_RPM_SAME_NAME SOLVER_RULE_PKG_SAME_NAME
 162 #define SOLVER_RULE_RPM_PACKAGE_OBSOLETES SOLVER_RULE_PKG_OBSOLETES
 163 #define SOLVER_RULE_RPM_IMPLICIT_OBSOLETES SOLVER_RULE_PKG_IMPLICIT_OBSOLETES
 164 #define SOLVER_RULE_RPM_INSTALLEDPKG_OBSOLETES SOLVER_RULE_PKG_INSTALLED_OBSOLETES
 165
 166 #ifdef __cplusplus
 167 }
 168 #endif
 169
 170 #endif
 171