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-rw-r--r--lib/libalpm/Makefile.am2
-rw-r--r--lib/libalpm/alpm.h1
-rw-r--r--lib/libalpm/deps.c138
-rw-r--r--lib/libalpm/deps.h9
4 files changed, 93 insertions, 57 deletions
diff --git a/lib/libalpm/Makefile.am b/lib/libalpm/Makefile.am
index 29a2f02d..afbfed0e 100644
--- a/lib/libalpm/Makefile.am
+++ b/lib/libalpm/Makefile.am
@@ -43,7 +43,7 @@ libalpm_la_SOURCES = \
versioncmp.h versioncmp.c
libalpm_la_LDFLAGS = -no-undefined -version-info $(LIB_VERSION_INFO)
-libalpm_la_LIBADD = -larchive -ldownload -lm
+libalpm_la_LIBADD = -larchive -ldownload
if HAS_DOXYGEN
all: doxygen.in
diff --git a/lib/libalpm/alpm.h b/lib/libalpm/alpm.h
index d4c584f8..e6c905fa 100644
--- a/lib/libalpm/alpm.h
+++ b/lib/libalpm/alpm.h
@@ -50,6 +50,7 @@ typedef struct __pmsyncpkg_t pmsyncpkg_t;
typedef struct __pmdepend_t pmdepend_t;
typedef struct __pmdepmissing_t pmdepmissing_t;
typedef struct __pmconflict_t pmconflict_t;
+typedef struct __pmgraph_t pmgraph_t;
/*
* Library
diff --git a/lib/libalpm/deps.c b/lib/libalpm/deps.c
index 52fdd9ac..66b2d77c 100644
--- a/lib/libalpm/deps.c
+++ b/lib/libalpm/deps.c
@@ -29,7 +29,6 @@
#ifdef __sun__
#include <strings.h>
#endif
-#include <math.h>
/* libalpm */
#include "deps.h"
@@ -46,6 +45,28 @@
extern pmhandle_t *handle;
+static pmgraph_t *_alpm_graph_new(void)
+{
+ pmgraph_t *graph = NULL;
+
+ graph = (pmgraph_t *)malloc(sizeof(pmgraph_t));
+ if(graph) {
+ graph->state = 0;
+ graph->data = NULL;
+ graph->parent = NULL;
+ graph->children = NULL;
+ graph->childptr = NULL;
+ }
+ return(graph);
+}
+
+static void _alpm_graph_free(void *data)
+{
+ pmgraph_t *graph = data;
+ alpm_list_free(graph->children);
+ free(graph);
+}
+
pmdepmissing_t *_alpm_depmiss_new(const char *target, pmdeptype_t type,
pmdepmod_t depmod, const char *depname,
const char *depversion)
@@ -108,11 +129,10 @@ int _alpm_depmiss_isin(pmdepmissing_t *needle, alpm_list_t *haystack)
alpm_list_t *_alpm_sortbydeps(alpm_list_t *targets, pmtranstype_t mode)
{
alpm_list_t *newtargs = NULL;
- alpm_list_t *i, *j, *k, *l;
- int change = 1;
- int numscans = 0;
- int numtargs = 0;
- int maxscans;
+ alpm_list_t *i, *j, *k;
+ alpm_list_t *vertices = NULL;
+ alpm_list_t *vptr;
+ pmgraph_t *vertex;
ALPM_LOG_FUNC;
@@ -120,65 +140,69 @@ alpm_list_t *_alpm_sortbydeps(alpm_list_t *targets, pmtranstype_t mode)
return(NULL);
}
+ _alpm_log(PM_LOG_DEBUG, _("started sorting dependencies"));
+
+ /* We create the vertices */
for(i = targets; i; i = i->next) {
- newtargs = alpm_list_add(newtargs, i->data);
- numtargs++;
+ pmgraph_t *vertex = _alpm_graph_new();
+ vertex->data = (void *)i->data;
+ vertices = alpm_list_add(vertices, vertex);
}
- maxscans = (int)sqrt(numtargs);
+ /* We compute the edges */
+ for(i = vertices; i; i = i->next) {
+ pmgraph_t *vertex_i = i->data;
+ pmpkg_t *p_i = vertex_i->data;
+ /* TODO this should be somehow combined with _alpm_checkdeps */
+ for(j = vertices; j; j = j->next) {
+ pmgraph_t *vertex_j = j->data;
+ pmpkg_t *p_j = vertex_j->data;
+ int child = 0;
+ for(k = alpm_pkg_get_depends(p_i); k && !child; k = k->next) {
+ pmdepend_t *depend = alpm_splitdep(k->data);
+ child = alpm_depcmp(p_j, depend);
+ free(depend);
+ }
+ if(child) vertex_i->children =
+ alpm_list_add(vertex_i->children, vertex_j);
+ }
+ vertex_i->childptr = vertex_i->children;
+ }
- _alpm_log(PM_LOG_DEBUG, _("started sorting dependencies"));
- while(change) {
- alpm_list_t *tmptargs = NULL;
- change = 0;
- if(numscans > maxscans) {
- _alpm_log(PM_LOG_DEBUG, _("possible dependency cycle detected"));
- continue;
+ vptr = vertices;
+ vertex = vertices->data;
+ while(vptr) {
+ /* mark that we touched the vertex */
+ vertex->state = -1;
+ int found = 0;
+ while(vertex->childptr && !found) {
+ pmgraph_t *nextchild = (vertex->childptr)->data;
+ vertex->childptr = (vertex->childptr)->next;
+ if (nextchild->state == 0) {
+ found = 1;
+ nextchild->parent = vertex;
+ vertex = nextchild;
+ }
+ else if(nextchild->state == -1) {
+ _alpm_log(PM_LOG_WARNING, _("dependency cycle detected\n"));
+ }
}
- numscans++;
- /* run thru targets, moving up packages as necessary */
- for(i = newtargs; i; i = i->next) {
- pmpkg_t *p = i->data;
- _alpm_log(PM_LOG_DEBUG, " sorting %s", alpm_pkg_get_name(p));
- for(j = alpm_pkg_get_depends(p); j; j = j->next) {
- pmdepend_t *depend = alpm_splitdep(j->data);
- pmpkg_t *q = NULL;
- if(depend == NULL) {
- continue;
+ if(!found) {
+ newtargs = alpm_list_add(newtargs, vertex->data);
+ /* mark that we've left this vertex */
+ vertex->state = 1;
+ vertex = vertex->parent;
+ if(!vertex) {
+ vptr = vptr->next;
+ while(vptr) {
+ vertex = vptr->data;
+ if (vertex->state == 0) break;
+ vptr = vptr->next;
}
- /* look for depend->name -- if it's farther down in the list, then
- * move it up above p
- */
- for(k = i->next; k; k = k->next) {
- q = k->data;
- const char *qname = alpm_pkg_get_name(q);
- if(!strcmp(depend->name, qname)) {
- if(!_alpm_pkg_find(qname, tmptargs)) {
- change = 1;
- tmptargs = alpm_list_add(tmptargs, q);
- }
- break;
- }
- for(l = alpm_pkg_get_provides(q); l; l = l->next) {
- const char *provname = l->data;
- if(!strcmp(depend->name, provname)) {
- if(!_alpm_pkg_find(qname, tmptargs)) {
- change = 1;
- tmptargs = alpm_list_add(tmptargs, q);
- }
- break;
- }
- }
- }
- free(depend);
- }
- if(!_alpm_pkg_find(alpm_pkg_get_name(p), tmptargs)) {
- tmptargs = alpm_list_add(tmptargs, p);
}
}
- alpm_list_free(newtargs);
- newtargs = tmptargs;
}
+
_alpm_log(PM_LOG_DEBUG, _("sorting dependencies finished"));
if(mode == PM_TRANS_TYPE_REMOVE) {
@@ -189,6 +213,8 @@ alpm_list_t *_alpm_sortbydeps(alpm_list_t *targets, pmtranstype_t mode)
newtargs = tmptargs;
}
+ alpm_list_free_inner(vertices, _alpm_graph_free);
+
return(newtargs);
}
diff --git a/lib/libalpm/deps.h b/lib/libalpm/deps.h
index 8f3a9b91..132f21f4 100644
--- a/lib/libalpm/deps.h
+++ b/lib/libalpm/deps.h
@@ -42,6 +42,15 @@ struct __pmdepmissing_t {
pmdepend_t depend;
};
+/* Graphs */
+struct __pmgraph_t {
+ int state; /* 0: untouched, -1: entered, other: leaving time */
+ void *data;
+ struct __pmgraph_t *parent; /* where did we come from? */
+ alpm_list_t *children;
+ alpm_list_t *childptr; /* points to a child in children list */
+};
+
pmdepmissing_t *_alpm_depmiss_new(const char *target, pmdeptype_t type,
pmdepmod_t depmod, const char *depname,
const char *depversion);
generated by cgit v1.2.3-70-g09d2 (git 2.47.0) at 2024-12-24 17:39:39 +0000