src/solver.h

   1 /*
   2  * solver.h
   3  *
   4  */
   5
   6 #ifndef SOLVER_H
   7 #define SOLVER_H
   8
   9 #include "pooltypes.h"
  10 #include "pool.h"
  11 #include "repo.h"
  12 #include "queue.h"
  13 #include "bitmap.h"
  14
  15 /* ----------------------------------------------
  16  * Rule
  17  *
  18  *   providerN(B) == Package Id of package providing tag B
  19  *   N = 1, 2, 3, in case of multiple providers
  20  *
  21  * A requires B : !A | provider1(B) | provider2(B)
  22  *
  23  * A conflicts B : (!A | !provider1(B)) & (!A | !provider2(B)) ...
  24  *
  25  * 'not' is encoded as a negative Id
  26  *
  27  * Binary rule: p = first literal, d = 0, w2 = second literal, w1 = p
  28  */
  29
  30 typedef struct rule {
  31   Id p;                 /* first literal in rule */
  32   Id d;                 /* Id offset into 'list of providers terminated by 0' as used by whatprovides; pool->whatprovides + d */
  33                         /* in case of binary rules, d == 0, w1 == p, w2 == other literal */
  34   Id w1, w2;            /* watches, literals not-yet-decided */
  35                                        /* if !w1, disabled */
  36                                        /* if !w2, assertion, not rule */
  37   Id n1, n2;            /* next rules in linked list, corresponding to w1,w2 */
  38 } Rule;
  39
  40 typedef struct solver {
  41   Pool *pool;
  42   Repo *installed;
  43
  44   int fixsystem;                        /* repair errors in rpm dependency graph */
  45   int allowdowngrade;                   /* allow to downgrade installed solvable */
  46   int allowarchchange;                  /* allow to change architecture of installed solvables */
  47   int allowvendorchange;                /* allow to change vendor of installed solvables */
  48   int allowuninstall;                   /* allow removal of installed solvables */
  49   int updatesystem;                     /* distupgrade */
  50   int allowvirtualconflicts;            /* false: conflicts on package name, true: conflicts on package provides */
  51   int noupdateprovide;                  /* true: update packages needs not to provide old package */
  52
  53   Rule *rules;                          /* all rules */
  54   Id nrules;                            /* rpm rules */
  55
  56   Id jobrules;                          /* user rules */
  57   Id systemrules;                       /* policy rules, e.g. keep packages installed or update. All literals > 0 */
  58   Id weakrules;                         /* rules that can be autodisabled */
  59   Id learntrules;                       /* learnt rules */
  60
  61   Id *weaksystemrules;                  /* please try to install (r->d) */
  62
  63   Id *watches;                          /* Array of rule offsets
  64                                          * watches has nsolvables*2 entries and is addressed from the middle
  65                                          * middle-solvable : decision to conflict, offset point to linked-list of rules
  66                                          * middle+solvable : decision to install: offset point to linked-list of rules
  67                                          */
  68
  69   Queue ruletojob;
  70
  71   /* our decisions: */
  72   Queue decisionq;
  73   Queue decisionq_why;                  /* index of rule, Offset into rules */
  74   Id *decisionmap;                      /* map for all available solvables, > 0: level of decision when installed, < 0 level of decision when conflict */
  75
  76   /* learnt rule history */
  77   Queue learnt_why;
  78   Queue learnt_pool;
  79   Queue minimize;
  80
  81   int propagate_index;
  82
  83   Queue problems;
  84   Queue suggestions;                    /* suggested packages */
  85
  86   Map recommendsmap;                    /* recommended packages from decisionmap */
  87   Map suggestsmap;                      /* suggested packages from decisionmap */
  88   int recommends_index;                 /* recommended level */
  89
  90   Id *obsoletes;                        /* obsoletes for each installed solvable */
  91   Id *obsoletes_data;                   /* data area for obsoletes */
  92
  93   int rc_output;                        /* output result compatible to redcarpet/zypp testsuite, set == 2 for pure rc (will suppress architecture) */
  94 } Solver;
  95
  96 /*
  97  * queue commands
  98  */
  99
 100 enum solvcmds {
 101   SOLVCMD_NULL=0,
 102   SOLVER_INSTALL_SOLVABLE,
 103   SOLVER_ERASE_SOLVABLE,
 104   SOLVER_INSTALL_SOLVABLE_NAME,
 105   SOLVER_ERASE_SOLVABLE_NAME,
 106   SOLVER_INSTALL_SOLVABLE_PROVIDES,
 107   SOLVER_ERASE_SOLVABLE_PROVIDES,
 108   SOLVER_INSTALL_SOLVABLE_UPDATE
 109 } SolverCmd;
 110
 111 extern Solver *solver_create(Pool *pool, Repo *installed);
 112 extern void solver_free(Solver *solv);
 113 extern void solve(Solver *solv, Queue *job);
 114
 115 extern void prune_best_version_arch(Pool *pool, Queue *plist);
 116
 117 void printdecisions(Solver *solv);
 118
 119
 120 #endif /* SOLVER_H */