1 files changed, 106 insertions, 35 deletions

diff --git a/lib/libalpm/deps.c b/lib/libalpm/deps.c
index ec52083e..c08c59e9 100644
--- a/lib/libalpm/deps.c
+++ b/lib/libalpm/deps.c
@@ -36,10 +36,19 @@
 #include "cache.h"
 #include "handle.h"
 
+void _alpm_dep_free(pmdepend_t *dep)
+{
+	FREE(dep->name);
+	FREE(dep->version);
+	FREE(dep);
+}
+
 static pmgraph_t *_alpm_graph_new(void)
 {
 	pmgraph_t *graph = NULL;
 
+	ALPM_LOG_FUNC;
+
 	MALLOC(graph, sizeof(pmgraph_t), RET_ERR(PM_ERR_MEMORY, NULL));
 
 	if(graph) {
@@ -59,8 +68,8 @@ static void _alpm_graph_free(void *data)
 	free(graph);
 }
 
-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;
 
@@ -68,18 +77,21 @@ 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)
@@ -217,6 +229,31 @@ static int satisfycmp(const void *pkg, const void *depend)
 /** 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_list_find(_alpm_db_get_pkgcache(db), dep, satisfycmp)) {
+			ret = alpm_list_add(ret, target);
+		}
+		_alpm_dep_free(dep);
+	}
+	return(ret);
+}
+
+/** 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 reversedeps handles the backward dependencies
  * @param remove an alpm_list_t* of packages to be removed
  * @param upgrade an alpm_list_t* of packages to be upgraded (remove-then-upgrade)
@@ -264,8 +301,7 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(pmdb_t *db, int reversedeps,
 				_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 +314,18 @@ 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_find(modified, depend, satisfycmp);
 				/* 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) &&
+				if(causingpkg &&
 				   !alpm_list_find(upgrade, depend, satisfycmp) &&
 				   !alpm_list_find(dblist, depend, satisfycmp)) {
 					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);
 				}
 			}
@@ -357,7 +393,7 @@ 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;
@@ -366,9 +402,9 @@ 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. */
@@ -392,25 +428,36 @@ 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
@@ -524,7 +571,7 @@ 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 */
@@ -612,7 +659,8 @@ 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);
 
@@ -628,7 +676,17 @@ 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)
@@ -638,7 +696,7 @@ 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)
@@ -648,7 +706,7 @@ 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)
@@ -658,7 +716,7 @@ 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)
@@ -668,7 +726,7 @@ 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.
@@ -678,7 +736,7 @@ 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;
@@ -686,6 +744,12 @@ 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 = "";
@@ -710,11 +774,18 @@ 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);
 }