1 files changed, 157 insertions, 86 deletions

diff --git a/lib/libalpm/deps.c b/lib/libalpm/deps.c
index b967243d..37e99162 100644
--- a/lib/libalpm/deps.c
+++ b/lib/libalpm/deps.c
@@ -30,37 +30,21 @@
 #include "alpm_list.h"
 #include "util.h"
 #include "log.h"
-#include "error.h"
+#include "graph.h"
 #include "package.h"
 #include "db.h"
 #include "cache.h"
 #include "handle.h"
 
-static pmgraph_t *_alpm_graph_new(void)
+void _alpm_dep_free(pmdepend_t *dep)
 {
-	pmgraph_t *graph = NULL;
-
-	MALLOC(graph, sizeof(pmgraph_t), RET_ERR(PM_ERR_MEMORY, NULL));
-
-	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);
+	FREE(dep->name);
+	FREE(dep->version);
+	FREE(dep);
 }
 
-pmdepmissing_t *_alpm_depmiss_new(const char *target, pmdepmod_t depmod,
-		const char *depname, const char *depversion)
+pmdepmissing_t *_alpm_depmiss_new(const char *target, pmdepend_t *dep,
+		const char *causingpkg)
 {
 	pmdepmissing_t *miss;
 
@@ -68,24 +52,27 @@ pmdepmissing_t *_alpm_depmiss_new(const char *target, pmdepmod_t depmod,
 
 	MALLOC(miss, sizeof(pmdepmissing_t), RET_ERR(PM_ERR_MEMORY, NULL));
 
-	strncpy(miss->target, target, PKG_NAME_LEN);
-	miss->depend.mod = depmod;
-	strncpy(miss->depend.name, depname, PKG_NAME_LEN);
-	if(depversion) {
-		strncpy(miss->depend.version, depversion, PKG_VERSION_LEN);
-	} else {
-		miss->depend.version[0] = 0;
-	}
+	STRDUP(miss->target, target, RET_ERR(PM_ERR_MEMORY, NULL));
+	miss->depend = _alpm_dep_dup(dep);
+	STRDUP(miss->causingpkg, causingpkg, RET_ERR(PM_ERR_MEMORY, NULL));
 
 	return(miss);
 }
 
+void _alpm_depmiss_free(pmdepmissing_t *miss)
+{
+	_alpm_dep_free(miss->depend);
+	FREE(miss->target);
+	FREE(miss->causingpkg);
+	FREE(miss);
+}
+
 /* Convert a list of pmpkg_t * to a graph structure,
  * with a edge for each dependency.
  * Returns a list of vertices (one vertex = one package)
  * (used by alpm_sortbydeps)
  */
-static alpm_list_t *_alpm_graph_init(alpm_list_t *targets)
+static alpm_list_t *dep_graph_init(alpm_list_t *targets)
 {
 	alpm_list_t *i, *j, *k;
 	alpm_list_t *vertices = NULL;
@@ -121,20 +108,19 @@ static alpm_list_t *_alpm_graph_init(alpm_list_t *targets)
 
 /* Re-order a list of target packages with respect to their dependencies.
  *
- * Example (PM_TRANS_TYPE_ADD):
+ * Example (reverse == 0):
  *   A depends on C
  *   B depends on A
  *   Target order is A,B,C,D
  *
  *   Should be re-ordered to C,A,B,D
  *
- * mode should be either PM_TRANS_TYPE_ADD or PM_TRANS_TYPE_REMOVE.  This
- * affects the dependency order sortbydeps() will use.
+ * if reverse is > 0, the dependency order will be reversed.
  *
  * This function returns the new alpm_list_t* target list.
  *
  */
-alpm_list_t *_alpm_sortbydeps(alpm_list_t *targets, pmtranstype_t mode)
+alpm_list_t *_alpm_sortbydeps(alpm_list_t *targets, int reverse)
 {
 	alpm_list_t *newtargs = NULL;
 	alpm_list_t *vertices = NULL;
@@ -149,7 +135,7 @@ alpm_list_t *_alpm_sortbydeps(alpm_list_t *targets, pmtranstype_t mode)
 
 	_alpm_log(PM_LOG_DEBUG, "started sorting dependencies\n");
 
-	vertices = _alpm_graph_init(targets);
+	vertices = dep_graph_init(targets);
 
 	vptr = vertices;
 	vertex = vertices->data;
@@ -169,7 +155,7 @@ alpm_list_t *_alpm_sortbydeps(alpm_list_t *targets, pmtranstype_t mode)
 				pmpkg_t *vertexpkg = vertex->data;
 				pmpkg_t *childpkg = nextchild->data;
 				_alpm_log(PM_LOG_WARNING, _("dependency cycle detected:\n"));
-				if(mode == PM_TRANS_TYPE_REMOVE) {
+				if(reverse) {
 					_alpm_log(PM_LOG_WARNING, _("%s will be removed after its %s dependency\n"), vertexpkg->name, childpkg->name);
 				} else {
 					_alpm_log(PM_LOG_WARNING, _("%s will be installed before its %s dependency\n"), vertexpkg->name, childpkg->name);
@@ -194,8 +180,8 @@ alpm_list_t *_alpm_sortbydeps(alpm_list_t *targets, pmtranstype_t mode)
 
 	_alpm_log(PM_LOG_DEBUG, "sorting dependencies finished\n");
 
-	if(mode == PM_TRANS_TYPE_REMOVE) {
-		/* we're removing packages, so reverse the order */
+	if(reverse) {
+		/* reverse the order */
 		alpm_list_t *tmptargs = alpm_list_reverse(newtargs);
 		/* free the old one */
 		alpm_list_free(newtargs);
@@ -208,10 +194,55 @@ alpm_list_t *_alpm_sortbydeps(alpm_list_t *targets, pmtranstype_t mode)
 	return(newtargs);
 }
 
-/* Little helper function for alpm_list_find */
-static int satisfycmp(const void *pkg, const void *depend)
+alpm_list_t *_alpm_find_dep_satisfiers(alpm_list_t *pkgs, pmdepend_t *dep)
 {
-	return(!alpm_depcmp((pmpkg_t*) pkg, (pmdepend_t*) depend));
+	alpm_list_t *i, *ret = NULL;
+
+	for(i = pkgs; i; i = alpm_list_next(i)) {
+		pmpkg_t *pkg = i->data;
+		if(alpm_depcmp(pkg, dep)) {
+			ret = alpm_list_add(ret, pkg);
+		}
+	}
+	return(ret);
+}
+
+/** Find packages in a list that provide a given package.
+ * @param pkgs an alpm_list_t* of package to search
+ * @param pkgname the name of the package
+ * @return an alpm_list_t* of packages that provide pkgname
+ */
+alpm_list_t SYMEXPORT *alpm_find_pkg_satisfiers(alpm_list_t *pkgs, const char *pkgname)
+{
+	pmdepend_t *dep = _alpm_splitdep(pkgname);
+	alpm_list_t *res = _alpm_find_dep_satisfiers(pkgs, dep);
+	_alpm_dep_free(dep);
+	return(res);
+}
+
+/** Checks dependencies and returns missing ones in a list.
+ * Dependencies can include versions with depmod operators.
+ * @param db pointer to the local package database
+ * @param targets an alpm_list_t* of dependencies strings to satisfy
+ * @return an alpm_list_t* of missing dependencies strings
+ */
+alpm_list_t SYMEXPORT *alpm_deptest(pmdb_t *db, alpm_list_t *targets)
+{
+	alpm_list_t *i, *ret = NULL;
+
+	for(i = targets; i; i = alpm_list_next(i)) {
+		pmdepend_t *dep;
+		char *target;
+
+		target = alpm_list_getdata(i);
+		dep = _alpm_splitdep(target);
+
+		if(!_alpm_find_dep_satisfiers(_alpm_db_get_pkgcache(db), dep)) {
+			ret = alpm_list_add(ret, target);
+		}
+		_alpm_dep_free(dep);
+	}
+	return(ret);
 }
 
 /** Checks dependencies and returns missing ones in a list.
@@ -257,15 +288,14 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(pmdb_t *db, int reversedeps,
 			pmdepend_t *depend = j->data;
 			/* 1. we check the upgrade list */
 			/* 2. we check database for untouched satisfying packages */
-			if(!alpm_list_find(upgrade, depend, satisfycmp) &&
-			   !alpm_list_find(dblist, depend, satisfycmp)) {
+			if(!_alpm_find_dep_satisfiers(upgrade, depend) &&
+			   !_alpm_find_dep_satisfiers(dblist, depend)) {
 				/* Unsatisfied dependency in the upgrade list */
 				char *missdepstring = alpm_dep_get_string(depend);
 				_alpm_log(PM_LOG_DEBUG, "checkdeps: missing dependency '%s' for package '%s'\n",
 						missdepstring, alpm_pkg_get_name(tp));
 				free(missdepstring);
-				miss = _alpm_depmiss_new(alpm_pkg_get_name(tp), depend->mod,
-						depend->name, depend->version);
+				miss = _alpm_depmiss_new(alpm_pkg_get_name(tp), depend, "");
 				baddeps = alpm_list_add(baddeps, miss);
 			}
 		}
@@ -278,18 +308,18 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(pmdb_t *db, int reversedeps,
 			pmpkg_t *lp = i->data;
 			for(j = alpm_pkg_get_depends(lp); j; j = j->next) {
 				pmdepend_t *depend = j->data;
+				pmpkg_t *causingpkg = alpm_list_getdata(_alpm_find_dep_satisfiers(modified, depend));
 				/* we won't break this depend, if it is already broken, we ignore it */
 				/* 1. check upgrade list for satisfiers */
 				/* 2. check dblist for satisfiers */
-				if(alpm_list_find(modified, depend, satisfycmp) &&
-				   !alpm_list_find(upgrade, depend, satisfycmp) &&
-				   !alpm_list_find(dblist, depend, satisfycmp)) {
+				if(causingpkg &&
+				   !_alpm_find_dep_satisfiers(upgrade, depend) &&
+				   !_alpm_find_dep_satisfiers(dblist, depend)) {
 					char *missdepstring = alpm_dep_get_string(depend);
 					_alpm_log(PM_LOG_DEBUG, "checkdeps: transaction would break '%s' dependency of '%s'\n",
 							missdepstring, alpm_pkg_get_name(lp));
 					free(missdepstring);
-					miss = _alpm_depmiss_new(lp->name, depend->mod,
-							depend->name, depend->version);
+					miss = _alpm_depmiss_new(lp->name, depend, alpm_pkg_get_name(causingpkg));
 					baddeps = alpm_list_add(baddeps, miss);
 				}
 			}
@@ -309,7 +339,7 @@ static int dep_vercmp(const char *version1, pmdepmod_t mod,
 	if(mod == PM_DEP_MOD_ANY) {
 		equal = 1;
 	} else {
-		int cmp = _alpm_versioncmp(version1, version2);
+		int cmp = alpm_pkg_vercmp(version1, version2);
 		switch(mod) {
 			case PM_DEP_MOD_EQ: equal = (cmp == 0); break;
 			case PM_DEP_MOD_GE: equal = (cmp >= 0); break;
@@ -356,7 +386,7 @@ int SYMEXPORT alpm_depcmp(pmpkg_t *pkg, pmdepend_t *dep)
 	return(satisfy);
 }
 
-pmdepend_t SYMEXPORT *alpm_splitdep(const char *depstring)
+pmdepend_t *_alpm_splitdep(const char *depstring)
 {
 	pmdepend_t *depend;
 	char *ptr = NULL;
@@ -365,9 +395,9 @@ pmdepend_t SYMEXPORT *alpm_splitdep(const char *depstring)
 	if(depstring == NULL) {
 		return(NULL);
 	}
-	newstr = strdup(depstring);
+	STRDUP(newstr, depstring, RET_ERR(PM_ERR_MEMORY, NULL));
 
-	MALLOC(depend, sizeof(pmdepend_t), return(NULL));
+	CALLOC(depend, 1, sizeof(pmdepend_t), RET_ERR(PM_ERR_MEMORY, NULL));
 
 	/* Find a version comparator if one exists. If it does, set the type and
 	 * increment the ptr accordingly so we can copy the right strings. */
@@ -391,25 +421,36 @@ pmdepend_t SYMEXPORT *alpm_splitdep(const char *depstring)
 		depend->mod = PM_DEP_MOD_GT;
 		*ptr = '\0';
 		ptr += 1;
-
 	} else {
-		/* no version specified - copy in the name and return it */
+		/* no version specified - copy the name and return it */
 		depend->mod = PM_DEP_MOD_ANY;
-		strncpy(depend->name, newstr, PKG_NAME_LEN);
-		depend->version[0] = '\0';
+		STRDUP(depend->name, newstr, RET_ERR(PM_ERR_MEMORY, NULL));
+		depend->version = NULL;
 		free(newstr);
 		return(depend);
 	}
 
 	/* if we get here, we have a version comparator, copy the right parts
 	 * to the right places */
-	strncpy(depend->name, newstr, PKG_NAME_LEN);
-	strncpy(depend->version, ptr, PKG_VERSION_LEN);
+	STRDUP(depend->name, newstr, RET_ERR(PM_ERR_MEMORY, NULL));
+	STRDUP(depend->version, ptr, RET_ERR(PM_ERR_MEMORY, NULL));
 	free(newstr);
 
 	return(depend);
 }
 
+pmdepend_t *_alpm_dep_dup(const pmdepend_t *dep)
+{
+	pmdepend_t *newdep;
+	CALLOC(newdep, 1, sizeof(pmdepend_t), RET_ERR(PM_ERR_MEMORY, NULL));
+
+	STRDUP(newdep->name, dep->name, RET_ERR(PM_ERR_MEMORY, NULL));
+	STRDUP(newdep->version, dep->version, RET_ERR(PM_ERR_MEMORY, NULL));
+	newdep->mod = dep->mod;
+
+	return(newdep);
+}
+
 /* These parameters are messy. We check if this package, given a list of
  * targets and a db is safe to remove. We do NOT remove it if it is in the
  * target list, or if if the package was explictly installed and
@@ -417,9 +458,9 @@ pmdepend_t SYMEXPORT *alpm_splitdep(const char *depstring)
 static int can_remove_package(pmdb_t *db, pmpkg_t *pkg, alpm_list_t *targets,
 		int include_explicit)
 {
-	alpm_list_t *i, *requiredby;
+	alpm_list_t *i, *j;
 
-	if(_alpm_pkg_find(alpm_pkg_get_name(pkg), targets)) {
+	if(_alpm_pkg_find(targets, alpm_pkg_get_name(pkg))) {
 		return(0);
 	}
 
@@ -439,15 +480,17 @@ static int can_remove_package(pmdb_t *db, pmpkg_t *pkg, alpm_list_t *targets,
 	 * if checkdeps detected it would break something */
 
 	/* see if other packages need it */
-	requiredby = alpm_pkg_compute_requiredby(pkg);
-	for(i = requiredby; i; i = i->next) {
-		pmpkg_t *reqpkg = _alpm_db_get_pkgfromcache(db, i->data);
-		if(reqpkg && !_alpm_pkg_find(alpm_pkg_get_name(reqpkg), targets)) {
-			FREELIST(requiredby);
-			return(0);
+	for(i = _alpm_db_get_pkgcache(db); i; i = i->next) {
+		pmpkg_t *lpkg = i->data;
+		for(j = alpm_pkg_get_depends(lpkg); j; j = j->next) {
+			if(alpm_depcmp(pkg, j->data)) {
+				if(!_alpm_pkg_find(targets, lpkg->name)) {
+					return(0);
+				}
+				break;
+			}
 		}
 	}
-	FREELIST(requiredby);
 
 	/* it's ok to remove */
 	return(1);
@@ -523,7 +566,7 @@ int _alpm_resolvedeps(pmdb_t *local, alpm_list_t *dbs_sync, pmpkg_t *syncpkg,
 	for(i = deps; i; i = i->next) {
 		int found = 0;
 		pmdepmissing_t *miss = i->data;
-		pmdepend_t *missdep = &(miss->depend);
+		pmdepend_t *missdep = alpm_miss_get_dep(miss);
 		pmpkg_t *sync = NULL;
 
 		/* check if one of the packages in *list already satisfies this dependency */
@@ -548,13 +591,15 @@ int _alpm_resolvedeps(pmdb_t *local, alpm_list_t *dbs_sync, pmpkg_t *syncpkg,
 			if(!sync) {
 				continue;
 			}
-			found = alpm_depcmp(sync, missdep) && !_alpm_pkg_find(alpm_pkg_get_name(sync), remove);
+			found = alpm_depcmp(sync, missdep) && !_alpm_pkg_find(remove, alpm_pkg_get_name(sync))
+				&& !_alpm_pkg_find(*list, alpm_pkg_get_name(sync));
 			if(!found) {
 				continue;
 			}
 			/* If package is in the ignorepkg list, ask before we pull it */
 			if(_alpm_pkg_should_ignore(sync)) {
-				pmpkg_t *dummypkg = _alpm_pkg_new(miss->target, NULL);
+				pmpkg_t *dummypkg = _alpm_pkg_new();
+				STRDUP(dummypkg->name, miss->target, RET_ERR(PM_ERR_MEMORY, -1));
 				QUESTION(trans, PM_TRANS_CONV_INSTALL_IGNOREPKG, dummypkg, sync, NULL, &found);
 				_alpm_pkg_free(dummypkg);
 			}
@@ -570,12 +615,14 @@ int _alpm_resolvedeps(pmdb_t *local, alpm_list_t *dbs_sync, pmpkg_t *syncpkg,
 					continue;
 				}
 				found = alpm_depcmp(sync, missdep) && strcmp(sync->name, missdep->name)
-					&& !_alpm_pkg_find(alpm_pkg_get_name(sync), remove);
+					&& !_alpm_pkg_find(remove, alpm_pkg_get_name(sync))
+					&& !_alpm_pkg_find(*list, alpm_pkg_get_name(sync));
 				if(!found) {
 					continue;
 				}
 				if(_alpm_pkg_should_ignore(sync)) {
-					pmpkg_t *dummypkg = _alpm_pkg_new(miss->target, NULL);
+					pmpkg_t *dummypkg = _alpm_pkg_new();
+					STRDUP(dummypkg->name, miss->target, RET_ERR(PM_ERR_MEMORY, -1));
 					QUESTION(trans, PM_TRANS_CONV_INSTALL_IGNOREPKG, dummypkg, sync, NULL, &found);
 					_alpm_pkg_free(dummypkg);
 				}
@@ -611,7 +658,8 @@ int _alpm_resolvedeps(pmdb_t *local, alpm_list_t *dbs_sync, pmpkg_t *syncpkg,
 
 	_alpm_log(PM_LOG_DEBUG, "finished resolving dependencies\n");
 
-	FREELIST(deps);
+	alpm_list_free_inner(deps, (alpm_list_fn_free)_alpm_depmiss_free);
+	alpm_list_free(deps);
 
 	return(0);
 
@@ -627,7 +675,17 @@ const char SYMEXPORT *alpm_miss_get_target(const pmdepmissing_t *miss)
 	/* Sanity checks */
 	ASSERT(miss != NULL, return(NULL));
 
-	return miss->target;
+	return(miss->target);
+}
+
+const char SYMEXPORT *alpm_miss_get_causingpkg(const pmdepmissing_t *miss)
+{
+	ALPM_LOG_FUNC;
+
+	/* Sanity checks */
+	ASSERT(miss != NULL, return(NULL));
+
+	return miss->causingpkg;
 }
 
 pmdepend_t SYMEXPORT *alpm_miss_get_dep(pmdepmissing_t *miss)
@@ -637,7 +695,7 @@ pmdepend_t SYMEXPORT *alpm_miss_get_dep(pmdepmissing_t *miss)
 	/* Sanity checks */
 	ASSERT(miss != NULL, return(NULL));
 
-	return &(miss->depend);
+	return(miss->depend);
 }
 
 pmdepmod_t SYMEXPORT alpm_dep_get_mod(const pmdepend_t *dep)
@@ -647,7 +705,7 @@ pmdepmod_t SYMEXPORT alpm_dep_get_mod(const pmdepend_t *dep)
 	/* Sanity checks */
 	ASSERT(dep != NULL, return(-1));
 
-	return dep->mod;
+	return(dep->mod);
 }
 
 const char SYMEXPORT *alpm_dep_get_name(const pmdepend_t *dep)
@@ -657,7 +715,7 @@ const char SYMEXPORT *alpm_dep_get_name(const pmdepend_t *dep)
 	/* Sanity checks */
 	ASSERT(dep != NULL, return(NULL));
 
-	return dep->name;
+	return(dep->name);
 }
 
 const char SYMEXPORT *alpm_dep_get_version(const pmdepend_t *dep)
@@ -667,7 +725,7 @@ const char SYMEXPORT *alpm_dep_get_version(const pmdepend_t *dep)
 	/* Sanity checks */
 	ASSERT(dep != NULL, return(NULL));
 
-	return dep->version;
+	return(dep->version);
 }
 
 /** Reverse of splitdep; make a dep string from a pmdepend_t struct.
@@ -677,7 +735,7 @@ const char SYMEXPORT *alpm_dep_get_version(const pmdepend_t *dep)
  */
 char SYMEXPORT *alpm_dep_get_string(const pmdepend_t *dep)
 {
-	char *opr, *str = NULL;
+	char *name, *opr, *ver, *str = NULL;
 	size_t len;
 
 	ALPM_LOG_FUNC;
@@ -685,6 +743,12 @@ char SYMEXPORT *alpm_dep_get_string(const pmdepend_t *dep)
 	/* Sanity checks */
 	ASSERT(dep != NULL, return(NULL));
 
+	if(dep->name) {
+		name = dep->name;
+	} else {
+		name = "";
+	}
+
 	switch(dep->mod) {
 		case PM_DEP_MOD_ANY:
 			opr = "";
@@ -709,11 +773,18 @@ char SYMEXPORT *alpm_dep_get_string(const pmdepend_t *dep)
 			break;
 	}
 
+	if(dep->version) {
+		ver = dep->version;
+	} else {
+		ver = "";
+	}
+
 	/* we can always compute len and print the string like this because opr
-	 * and ver will be empty when PM_DEP_MOD_ANY is the depend type */
-	len = strlen(dep->name) + strlen(opr) + strlen(dep->version) + 1;
+	 * and ver will be empty when PM_DEP_MOD_ANY is the depend type. the
+	 * reassignments above also ensure we do not do a strlen(NULL). */
+	len = strlen(name) + strlen(opr) + strlen(ver) + 1;
 	MALLOC(str, len, RET_ERR(PM_ERR_MEMORY, NULL));
-	snprintf(str, len, "%s%s%s", dep->name, opr, dep->version);
+	snprintf(str, len, "%s%s%s", name, opr, ver);
 
 	return(str);
 }