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-rw-r--r--lib/libalpm/Makefile.am1
-rw-r--r--lib/libalpm/alpm.h4
-rw-r--r--lib/libalpm/alpm_list.c86
-rw-r--r--lib/libalpm/alpm_list.h1
-rw-r--r--lib/libalpm/be_local.c20
-rw-r--r--lib/libalpm/be_sync.c77
-rw-r--r--lib/libalpm/conflict.c4
-rw-r--r--lib/libalpm/db.c55
-rw-r--r--lib/libalpm/db.h7
-rw-r--r--lib/libalpm/deps.c8
-rw-r--r--lib/libalpm/package.c2
-rw-r--r--lib/libalpm/pkghash.c346
-rw-r--r--lib/libalpm/pkghash.h58
-rw-r--r--lib/libalpm/remove.c6
-rw-r--r--lib/libalpm/sync.c8
15 files changed, 610 insertions, 73 deletions
diff --git a/lib/libalpm/Makefile.am b/lib/libalpm/Makefile.am
index da663cb5..1bda5714 100644
--- a/lib/libalpm/Makefile.am
+++ b/lib/libalpm/Makefile.am
@@ -40,6 +40,7 @@ libalpm_la_SOURCES = \
handle.h handle.c \
log.h log.c \
package.h package.c \
+ pkghash.h pkghash.c \
remove.h remove.c \
sync.h sync.c \
trans.h trans.c \
diff --git a/lib/libalpm/alpm.h b/lib/libalpm/alpm.h
index 19ea4ffd..7fec293d 100644
--- a/lib/libalpm/alpm.h
+++ b/lib/libalpm/alpm.h
@@ -52,6 +52,7 @@ typedef struct __pmdepend_t pmdepend_t;
typedef struct __pmdepmissing_t pmdepmissing_t;
typedef struct __pmconflict_t pmconflict_t;
typedef struct __pmfileconflict_t pmfileconflict_t;
+typedef struct __pmpkghash_t pmpkghash_t;
/*
* Library
@@ -186,7 +187,8 @@ int alpm_db_setserver(pmdb_t *db, const char *url);
int alpm_db_update(int level, pmdb_t *db);
pmpkg_t *alpm_db_get_pkg(pmdb_t *db, const char *name);
-alpm_list_t *alpm_db_get_pkgcache(pmdb_t *db);
+pmpkghash_t *alpm_db_get_pkgcache(pmdb_t *db);
+alpm_list_t *alpm_db_get_pkgcache_list(pmdb_t *db);
pmgrp_t *alpm_db_readgrp(pmdb_t *db, const char *name);
alpm_list_t *alpm_db_get_grpcache(pmdb_t *db);
diff --git a/lib/libalpm/alpm_list.c b/lib/libalpm/alpm_list.c
index 3f9525e8..4cab665f 100644
--- a/lib/libalpm/alpm_list.c
+++ b/lib/libalpm/alpm_list.c
@@ -287,6 +287,53 @@ alpm_list_t SYMEXPORT *alpm_list_msort(alpm_list_t *list, size_t n, alpm_list_fn
/**
* @brief Remove an item from the list.
+ * item is not freed; this is the respnsiblity of the caller.
+ *
+ * @param haystack the list to remove the item from
+ * @param item the item to remove from the list
+ *
+ * @return the resultant list
+ */
+alpm_list_t SYMEXPORT *alpm_list_remove_item(alpm_list_t *haystack,
+ alpm_list_t *item)
+{
+ if(haystack == NULL || item == NULL) {
+ return(haystack);
+ }
+
+ if(item == haystack) {
+ /* Special case: removing the head node which has a back reference to
+ * the tail node */
+ haystack = item->next;
+ if(haystack) {
+ haystack->prev = item->prev;
+ }
+ item->prev = NULL;
+ } else if(item == haystack->prev) {
+ /* Special case: removing the tail node, so we need to fix the back
+ * reference on the head node. We also know tail != head. */
+ if(item->prev) {
+ /* i->next should always be null */
+ item->prev->next = item->next;
+ haystack->prev = item->prev;
+ item->prev = NULL;
+ }
+ } else {
+ /* Normal case, non-head and non-tail node */
+ if(item->next) {
+ item->next->prev = item->prev;
+ }
+ if(item->prev) {
+ item->prev->next = item->next;
+ }
+ }
+
+ return(haystack);
+}
+
+
+/**
+ * @brief Remove an item from the list.
*
* @param haystack the list to remove the item from
* @param needle the data member of the item we're removing
@@ -295,9 +342,10 @@ alpm_list_t SYMEXPORT *alpm_list_msort(alpm_list_t *list, size_t n, alpm_list_fn
*
* @return the resultant list
*/
-alpm_list_t SYMEXPORT *alpm_list_remove(alpm_list_t *haystack, const void *needle, alpm_list_fn_cmp fn, void **data)
+alpm_list_t SYMEXPORT *alpm_list_remove(alpm_list_t *haystack,
+ const void *needle, alpm_list_fn_cmp fn, void **data)
{
- alpm_list_t *i = haystack, *tmp = NULL;
+ alpm_list_t *i = haystack;
if(data) {
*data = NULL;
@@ -312,44 +360,16 @@ alpm_list_t SYMEXPORT *alpm_list_remove(alpm_list_t *haystack, const void *needl
i = i->next;
continue;
}
- tmp = i->next;
if(fn(i->data, needle) == 0) {
- /* we found a matching item */
- if(i == haystack) {
- /* Special case: removing the head node which has a back reference to
- * the tail node */
- haystack = i->next;
- if(haystack) {
- haystack->prev = i->prev;
- }
- i->prev = NULL;
- } else if(i == haystack->prev) {
- /* Special case: removing the tail node, so we need to fix the back
- * reference on the head node. We also know tail != head. */
- if(i->prev) {
- /* i->next should always be null */
- i->prev->next = i->next;
- haystack->prev = i->prev;
- i->prev = NULL;
- }
- } else {
- /* Normal case, non-head and non-tail node */
- if(i->next) {
- i->next->prev = i->prev;
- }
- if(i->prev) {
- i->prev->next = i->next;
- }
- }
+ haystack = alpm_list_remove_item(haystack, i);
if(data) {
*data = i->data;
}
- i->data = NULL;
free(i);
- i = NULL;
+ break;
} else {
- i = tmp;
+ i = i->next;
}
}
diff --git a/lib/libalpm/alpm_list.h b/lib/libalpm/alpm_list.h
index ee85a5dd..1f6393a6 100644
--- a/lib/libalpm/alpm_list.h
+++ b/lib/libalpm/alpm_list.h
@@ -57,6 +57,7 @@ alpm_list_t *alpm_list_add_sorted(alpm_list_t *list, void *data, alpm_list_fn_cm
alpm_list_t *alpm_list_join(alpm_list_t *first, alpm_list_t *second);
alpm_list_t *alpm_list_mmerge(alpm_list_t *left, alpm_list_t *right, alpm_list_fn_cmp fn);
alpm_list_t *alpm_list_msort(alpm_list_t *list, size_t n, alpm_list_fn_cmp fn);
+alpm_list_t *alpm_list_remove_item(alpm_list_t *haystack, alpm_list_t *item);
alpm_list_t *alpm_list_remove(alpm_list_t *haystack, const void *needle, alpm_list_fn_cmp fn, void **data);
alpm_list_t *alpm_list_remove_str(alpm_list_t *haystack, const char *needle, char **data);
alpm_list_t *alpm_list_remove_dupes(const alpm_list_t *list);
diff --git a/lib/libalpm/be_local.c b/lib/libalpm/be_local.c
index c7110faf..12021ac2 100644
--- a/lib/libalpm/be_local.c
+++ b/lib/libalpm/be_local.c
@@ -367,7 +367,8 @@ static int is_dir(const char *path, struct dirent *entry)
static int local_db_populate(pmdb_t *db)
{
- int count = 0;
+ int est_count, count = 0;
+ struct stat buf;
struct dirent *ent = NULL;
const char *dbpath;
DIR *dbdir;
@@ -384,6 +385,15 @@ static int local_db_populate(pmdb_t *db)
if(dbdir == NULL) {
return(0);
}
+ if(fstat(dirfd(dbdir), &buf) != 0) {
+ return(0);
+ }
+ /* subtract the two always-there pointers to get # of children */
+ est_count = (int)buf.st_nlink - 2;
+
+ /* initialize hash at 50% full */
+ db->pkgcache = _alpm_pkghash_create(est_count * 2);
+
while((ent = readdir(dbdir)) != NULL) {
const char *name = ent->d_name;
@@ -410,7 +420,7 @@ static int local_db_populate(pmdb_t *db)
}
/* duplicated database entries are not allowed */
- if(_alpm_pkg_find(db->pkgcache, pkg->name)) {
+ if(_alpm_pkghash_find(db->pkgcache, pkg->name)) {
_alpm_log(PM_LOG_ERROR, _("duplicated database entry '%s'\n"), pkg->name);
_alpm_pkg_free(pkg);
continue;
@@ -430,12 +440,14 @@ static int local_db_populate(pmdb_t *db)
/* add to the collection */
_alpm_log(PM_LOG_FUNCTION, "adding '%s' to package cache for db '%s'\n",
pkg->name, db->treename);
- db->pkgcache = alpm_list_add(db->pkgcache, pkg);
+ db->pkgcache = _alpm_pkghash_add(db->pkgcache, pkg);
count++;
}
closedir(dbdir);
- db->pkgcache = alpm_list_msort(db->pkgcache, (size_t)count, _alpm_pkg_cmp);
+ if(count > 0) {
+ db->pkgcache->list = alpm_list_msort(db->pkgcache->list, (size_t)count, _alpm_pkg_cmp);
+ }
return(count);
}
diff --git a/lib/libalpm/be_sync.c b/lib/libalpm/be_sync.c
index f7101f54..4ad045c2 100644
--- a/lib/libalpm/be_sync.c
+++ b/lib/libalpm/be_sync.c
@@ -145,9 +145,67 @@ int SYMEXPORT alpm_db_update(int force, pmdb_t *db)
static int sync_db_read(pmdb_t *db, struct archive *archive,
struct archive_entry *entry, pmpkg_t *likely_pkg);
+/*
+ * This is the data table used to generate the estimating function below.
+ * "Weighted Avg" means averaging the bottom table values; thus each repo, big
+ * or small, will have equal influence. "Unweighted Avg" means averaging the
+ * sums of the top table columns, thus each package has equal influence. The
+ * final values are calculated by (surprise) averaging the averages, because
+ * why the hell not.
+ *
+ * Database Pkgs tar bz2 gz xz
+ * community 2096 5294080 256391 421227 301296
+ * core 180 460800 25257 36850 29356
+ * extra 2606 6635520 294647 470818 339392
+ * multilib 126 327680 16120 23261 18732
+ * testing 76 204800 10902 14348 12100
+ *
+ * Bytes Per Package
+ * community 2096 2525.80 122.32 200.97 143.75
+ * core 180 2560.00 140.32 204.72 163.09
+ * extra 2606 2546.25 113.06 180.67 130.23
+ * multilib 126 2600.63 127.94 184.61 148.67
+ * testing 76 2694.74 143.45 188.79 159.21
+
+ * Weighted Avg 2585.48 129.42 191.95 148.99
+ * Unweighted Avg 2543.39 118.74 190.16 137.93
+ * Average of Avgs 2564.44 124.08 191.06 143.46
+ */
+static int estimate_package_count(struct stat *st, struct archive *archive)
+{
+ unsigned int per_package;
+
+ switch(archive_compression(archive)) {
+ case ARCHIVE_COMPRESSION_NONE:
+ per_package = 2564;
+ break;
+ case ARCHIVE_COMPRESSION_GZIP:
+ per_package = 191;
+ break;
+ case ARCHIVE_COMPRESSION_BZIP2:
+ per_package = 124;
+ break;
+ case ARCHIVE_COMPRESSION_COMPRESS:
+ per_package = 193;
+ break;
+ case ARCHIVE_COMPRESSION_LZMA:
+ case ARCHIVE_COMPRESSION_XZ:
+ per_package = 143;
+ break;
+ case ARCHIVE_COMPRESSION_UU:
+ per_package = 3543;
+ break;
+ default:
+ /* assume it is at least somewhat compressed */
+ per_package = 200;
+ }
+ return((int)(st->st_size / per_package) + 1);
+}
+
static int sync_db_populate(pmdb_t *db)
{
- int count = 0;
+ int est_count, count = 0;
+ struct stat buf;
struct archive *archive;
struct archive_entry *entry;
pmpkg_t *pkg = NULL;
@@ -169,6 +227,13 @@ static int sync_db_populate(pmdb_t *db)
archive_read_finish(archive);
RET_ERR(PM_ERR_DB_OPEN, 1);
}
+ if(lstat(_alpm_db_path(db), &buf) != 0) {
+ RET_ERR(PM_ERR_DB_OPEN, 1);
+ }
+ est_count = estimate_package_count(&buf, archive);
+
+ /* initialize hash at 66% full */
+ db->pkgcache = _alpm_pkghash_create(est_count * 3 / 2);
while(archive_read_next_header(archive, &entry) == ARCHIVE_OK) {
const struct stat *st;
@@ -194,7 +259,7 @@ static int sync_db_populate(pmdb_t *db)
}
/* duplicated database entries are not allowed */
- if(_alpm_pkg_find(db->pkgcache, pkg->name)) {
+ if(_alpm_pkghash_find(db->pkgcache, pkg->name)) {
_alpm_log(PM_LOG_ERROR, _("duplicated database entry '%s'\n"), pkg->name);
_alpm_pkg_free(pkg);
continue;
@@ -207,7 +272,7 @@ static int sync_db_populate(pmdb_t *db)
/* add to the collection */
_alpm_log(PM_LOG_FUNCTION, "adding '%s' to package cache for db '%s'\n",
pkg->name, db->treename);
- db->pkgcache = alpm_list_add(db->pkgcache, pkg);
+ db->pkgcache = _alpm_pkghash_add(db->pkgcache, pkg);
count++;
} else {
/* we have desc, depends or deltas - parse it */
@@ -215,7 +280,9 @@ static int sync_db_populate(pmdb_t *db)
}
}
- db->pkgcache = alpm_list_msort(db->pkgcache, (size_t)count, _alpm_pkg_cmp);
+ if(count > 0) {
+ db->pkgcache->list = alpm_list_msort(db->pkgcache->list, (size_t)count, _alpm_pkg_cmp);
+ }
archive_read_finish(archive);
return(count);
@@ -281,7 +348,7 @@ static int sync_db_read(pmdb_t *db, struct archive *archive,
if(likely_pkg && strcmp(likely_pkg->name, pkgname) == 0) {
pkg = likely_pkg;
} else {
- pkg = _alpm_pkg_find(db->pkgcache, pkgname);
+ pkg = _alpm_pkghash_find(db->pkgcache, pkgname);
}
if(pkg == NULL) {
_alpm_log(PM_LOG_DEBUG, "package %s not found in %s sync database",
diff --git a/lib/libalpm/conflict.c b/lib/libalpm/conflict.c
index fc25e7d3..17e728a5 100644
--- a/lib/libalpm/conflict.c
+++ b/lib/libalpm/conflict.c
@@ -207,8 +207,8 @@ alpm_list_t *_alpm_outerconflicts(pmdb_t *db, alpm_list_t *packages)
return(NULL);
}
- alpm_list_t *dblist = alpm_list_diff(_alpm_db_get_pkgcache(db), packages,
- _alpm_pkg_cmp);
+ alpm_list_t *dblist = alpm_list_diff(_alpm_db_get_pkgcache_list(db),
+ packages, _alpm_pkg_cmp);
/* two checks to be done here for conflicts */
_alpm_log(PM_LOG_DEBUG, "check targets vs db\n");
diff --git a/lib/libalpm/db.c b/lib/libalpm/db.c
index c80dcbb8..02f82823 100644
--- a/lib/libalpm/db.c
+++ b/lib/libalpm/db.c
@@ -249,9 +249,9 @@ pmpkg_t SYMEXPORT *alpm_db_get_pkg(pmdb_t *db, const char *name)
/** Get the package cache of a package database
* @param db pointer to the package database to get the package from
- * @return the list of packages on success, NULL on error
+ * @return the hash of packages on success, NULL on error
*/
-alpm_list_t SYMEXPORT *alpm_db_get_pkgcache(pmdb_t *db)
+pmpkghash_t SYMEXPORT *alpm_db_get_pkgcache(pmdb_t *db)
{
ALPM_LOG_FUNC;
@@ -262,6 +262,21 @@ alpm_list_t SYMEXPORT *alpm_db_get_pkgcache(pmdb_t *db)
return(_alpm_db_get_pkgcache(db));
}
+/** Get the package cache of a package database
+ * @param db pointer to the package database to get the package from
+ * @return the list of packages on success, NULL on error
+ */
+alpm_list_t SYMEXPORT *alpm_db_get_pkgcache_list(pmdb_t *db)
+{
+ ALPM_LOG_FUNC;
+
+ /* Sanity checks */
+ ASSERT(handle != NULL, return(NULL));
+ ASSERT(db != NULL, return(NULL));
+
+ return(_alpm_db_get_pkgcache_list(db));
+}
+
/** Get a group entry from a package database
* @param db pointer to the package database to get the group from
* @param name of the group
@@ -417,7 +432,7 @@ alpm_list_t *_alpm_db_search(pmdb_t *db, const alpm_list_t *needles)
const alpm_list_t *i, *j, *k;
alpm_list_t *ret = NULL;
/* copy the pkgcache- we will free the list var after each needle */
- alpm_list_t *list = alpm_list_copy(_alpm_db_get_pkgcache(db));
+ alpm_list_t *list = alpm_list_copy(_alpm_db_get_pkgcache_list(db));
ALPM_LOG_FUNC;
@@ -523,14 +538,15 @@ void _alpm_db_free_pkgcache(pmdb_t *db)
_alpm_log(PM_LOG_DEBUG, "freeing package cache for repository '%s'\n",
db->treename);
- alpm_list_free_inner(db->pkgcache, (alpm_list_fn_free)_alpm_pkg_free);
- alpm_list_free(db->pkgcache);
+ alpm_list_free_inner(_alpm_db_get_pkgcache_list(db),
+ (alpm_list_fn_free)_alpm_pkg_free);
+ _alpm_pkghash_free(db->pkgcache);
db->pkgcache_loaded = 0;
_alpm_db_free_grpcache(db);
}
-alpm_list_t *_alpm_db_get_pkgcache(pmdb_t *db)
+pmpkghash_t *_alpm_db_get_pkgcache(pmdb_t *db)
{
ALPM_LOG_FUNC;
@@ -550,6 +566,19 @@ alpm_list_t *_alpm_db_get_pkgcache(pmdb_t *db)
return(db->pkgcache);
}
+alpm_list_t *_alpm_db_get_pkgcache_list(pmdb_t *db)
+{
+ ALPM_LOG_FUNC;
+
+ pmpkghash_t *hash = _alpm_db_get_pkgcache(db);
+
+ if(hash == NULL) {
+ return(NULL);
+ }
+
+ return(hash->list);
+}
+
/* "duplicate" pkg then add it to pkgcache */
int _alpm_db_add_pkgincache(pmdb_t *db, pmpkg_t *pkg)
{
@@ -568,7 +597,7 @@ int _alpm_db_add_pkgincache(pmdb_t *db, pmpkg_t *pkg)
_alpm_log(PM_LOG_DEBUG, "adding entry '%s' in '%s' cache\n",
alpm_pkg_get_name(newpkg), db->treename);
- db->pkgcache = alpm_list_add_sorted(db->pkgcache, newpkg, _alpm_pkg_cmp);
+ db->pkgcache = _alpm_pkghash_add_sorted(db->pkgcache, newpkg);
_alpm_db_free_grpcache(db);
@@ -577,8 +606,7 @@ int _alpm_db_add_pkgincache(pmdb_t *db, pmpkg_t *pkg)
int _alpm_db_remove_pkgfromcache(pmdb_t *db, pmpkg_t *pkg)
{
- void *vdata;
- pmpkg_t *data;
+ pmpkg_t *data = NULL;
ALPM_LOG_FUNC;
@@ -589,8 +617,7 @@ int _alpm_db_remove_pkgfromcache(pmdb_t *db, pmpkg_t *pkg)
_alpm_log(PM_LOG_DEBUG, "removing entry '%s' from '%s' cache\n",
alpm_pkg_get_name(pkg), db->treename);
- db->pkgcache = alpm_list_remove(db->pkgcache, pkg, _alpm_pkg_cmp, &vdata);
- data = vdata;
+ db->pkgcache = _alpm_pkghash_remove(db->pkgcache, pkg, &data);
if(data == NULL) {
/* package not found */
_alpm_log(PM_LOG_DEBUG, "cannot remove entry '%s' from '%s' cache: not found\n",
@@ -613,14 +640,14 @@ pmpkg_t *_alpm_db_get_pkgfromcache(pmdb_t *db, const char *target)
return(NULL);
}
- alpm_list_t *pkgcache = _alpm_db_get_pkgcache(db);
+ pmpkghash_t *pkgcache = _alpm_db_get_pkgcache(db);
if(!pkgcache) {
_alpm_log(PM_LOG_DEBUG, "warning: failed to get '%s' from NULL pkgcache\n",
target);
return(NULL);
}
- return(_alpm_pkg_find(pkgcache, target));
+ return(_alpm_pkghash_find(pkgcache, target));
}
/* Returns a new group cache from db.
@@ -638,7 +665,7 @@ int _alpm_db_load_grpcache(pmdb_t *db)
_alpm_log(PM_LOG_DEBUG, "loading group cache for repository '%s'\n",
db->treename);
- for(lp = _alpm_db_get_pkgcache(db); lp; lp = lp->next) {
+ for(lp = _alpm_db_get_pkgcache_list(db); lp; lp = lp->next) {
const alpm_list_t *i;
pmpkg_t *pkg = lp->data;
diff --git a/lib/libalpm/db.h b/lib/libalpm/db.h
index b7fa7ca6..c5b3db69 100644
--- a/lib/libalpm/db.h
+++ b/lib/libalpm/db.h
@@ -23,6 +23,8 @@
#define _ALPM_DB_H
#include "alpm.h"
+#include "pkghash.h"
+
#include <time.h>
/* libarchive */
@@ -54,7 +56,7 @@ struct __pmdb_t {
int grpcache_loaded;
/* also indicates whether we are RO or RW */
int is_local;
- alpm_list_t *pkgcache;
+ pmpkghash_t *pkgcache;
alpm_list_t *grpcache;
alpm_list_t *servers;
@@ -84,7 +86,8 @@ int _alpm_db_load_pkgcache(pmdb_t *db);
void _alpm_db_free_pkgcache(pmdb_t *db);
int _alpm_db_add_pkgincache(pmdb_t *db, pmpkg_t *pkg);
int _alpm_db_remove_pkgfromcache(pmdb_t *db, pmpkg_t *pkg);
-alpm_list_t *_alpm_db_get_pkgcache(pmdb_t *db);
+pmpkghash_t *_alpm_db_get_pkgcache(pmdb_t *db);
+alpm_list_t *_alpm_db_get_pkgcache_list(pmdb_t *db);
int _alpm_db_ensure_pkgcache(pmdb_t *db, pmdbinfrq_t infolevel);
pmpkg_t *_alpm_db_get_pkgfromcache(pmdb_t *db, const char *target);
/* groups */
diff --git a/lib/libalpm/deps.c b/lib/libalpm/deps.c
index b667b0e8..dca8877e 100644
--- a/lib/libalpm/deps.c
+++ b/lib/libalpm/deps.c
@@ -475,7 +475,7 @@ 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 */
- for(i = _alpm_db_get_pkgcache(db); i; i = i->next) {
+ for(i = _alpm_db_get_pkgcache_list(db); i; i = i->next) {
pmpkg_t *lpkg = i->data;
if(_alpm_dep_edge(lpkg, pkg) && !_alpm_pkg_find(targets, lpkg->name)) {
return(0);
@@ -508,7 +508,7 @@ void _alpm_recursedeps(pmdb_t *db, alpm_list_t *targs, int include_explicit)
for(i = targs; i; i = i->next) {
pmpkg_t *pkg = i->data;
- for(j = _alpm_db_get_pkgcache(db); j; j = j->next) {
+ for(j = _alpm_db_get_pkgcache_list(db); j; j = j->next) {
pmpkg_t *deppkg = j->data;
if(_alpm_dep_edge(pkg, deppkg)
&& can_remove_package(db, deppkg, targs, include_explicit)) {
@@ -586,7 +586,7 @@ pmpkg_t *_alpm_resolvedep(pmdepend_t *dep, alpm_list_t *dbs,
}
/* 2. satisfiers (skip literals here) */
for(i = dbs; i; i = i->next) {
- for(j = _alpm_db_get_pkgcache(i->data); j; j = j->next) {
+ for(j = _alpm_db_get_pkgcache_list(i->data); j; j = j->next) {
pmpkg_t *pkg = j->data;
if(_alpm_depcmp_tolerant(pkg, dep) && strcmp(pkg->name, dep->name) != 0 &&
!_alpm_pkg_find(excluding, pkg->name)) {
@@ -614,7 +614,7 @@ pmpkg_t *_alpm_resolvedep(pmdepend_t *dep, alpm_list_t *dbs,
/* first check if one provider is already installed locally */
for(i = providers; i; i = i->next) {
pmpkg_t *pkg = i->data;
- if (_alpm_pkg_find(_alpm_db_get_pkgcache(handle->db_local), pkg->name)) {
+ if (_alpm_pkghash_find(_alpm_db_get_pkgcache(handle->db_local), pkg->name)) {
alpm_list_free(providers);
return(pkg);
}
diff --git a/lib/libalpm/package.c b/lib/libalpm/package.c
index d4b3b9c0..0a1102c8 100644
--- a/lib/libalpm/package.c
+++ b/lib/libalpm/package.c
@@ -338,7 +338,7 @@ int SYMEXPORT alpm_pkg_has_scriptlet(pmpkg_t *pkg)
static void find_requiredby(pmpkg_t *pkg, pmdb_t *db, alpm_list_t **reqs)
{
const alpm_list_t *i;
- for(i = _alpm_db_get_pkgcache(db); i; i = i->next) {
+ for(i = _alpm_db_get_pkgcache_list(db); i; i = i->next) {
if(!i->data) {
continue;
}
diff --git a/lib/libalpm/pkghash.c b/lib/libalpm/pkghash.c
new file mode 100644
index 00000000..54805275
--- /dev/null
+++ b/lib/libalpm/pkghash.c
@@ -0,0 +1,346 @@
+/*
+ * pkghash.c
+ *
+ * Copyright (c) 2011 Pacman Development Team <pacman-dev@archlinux.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "pkghash.h"
+#include "util.h"
+#include "log.h"
+
+/* List of primes for possible sizes of hash tables.
+ *
+ * The maximum table size is the last prime under 1,000,000. That is
+ * more than an order of magnitude greater than the number of packages
+ * in any Linux distribution.
+ */
+static const size_t prime_list[] =
+{
+ 11ul, 13ul, 17ul, 19ul, 23ul, 29ul, 31ul, 37ul, 41ul, 43ul, 47ul,
+ 53ul, 59ul, 61ul, 67ul, 71ul, 73ul, 79ul, 83ul, 89ul, 97ul, 103ul,
+ 109ul, 113ul, 127ul, 137ul, 139ul, 149ul, 157ul, 167ul, 179ul, 193ul,
+ 199ul, 211ul, 227ul, 241ul, 257ul, 277ul, 293ul, 313ul, 337ul, 359ul,
+ 383ul, 409ul, 439ul, 467ul, 503ul, 541ul, 577ul, 619ul, 661ul, 709ul,
+ 761ul, 823ul, 887ul, 953ul, 1031ul, 1109ul, 1193ul, 1289ul, 1381ul,
+ 1493ul, 1613ul, 1741ul, 1879ul, 2029ul, 2179ul, 2357ul, 2549ul,
+ 2753ul, 2971ul, 3209ul, 3469ul, 3739ul, 4027ul, 4349ul, 4703ul,
+ 5087ul, 5503ul, 5953ul, 6427ul, 6949ul, 7517ul, 8123ul, 8783ul,
+ 9497ul, 10273ul, 11113ul, 12011ul, 12983ul, 14033ul, 15173ul,
+ 16411ul, 17749ul, 19183ul, 20753ul, 22447ul, 24281ul, 26267ul,
+ 28411ul, 30727ul, 33223ul, 35933ul, 38873ul, 42043ul, 45481ul,
+ 49201ul, 53201ul, 57557ul, 62233ul, 67307ul, 72817ul, 78779ul,
+ 85229ul, 92203ul, 99733ul, 107897ul, 116731ul, 126271ul, 136607ul,
+ 147793ul, 159871ul, 172933ul, 187091ul, 202409ul, 218971ul, 236897ul,
+ 256279ul, 277261ul, 299951ul, 324503ul, 351061ul, 379787ul, 410857ul,
+ 444487ul, 480881ul, 520241ul, 562841ul, 608903ul, 658753ul, 712697ul,
+ 771049ul, 834181ul, 902483ul, 976369ul
+};
+
+/* Allocate a hash table with at least "size" buckets */
+pmpkghash_t *_alpm_pkghash_create(size_t size)
+{
+ pmpkghash_t *hash = NULL;
+ size_t i, loopsize;
+
+ MALLOC(hash, sizeof(pmpkghash_t), RET_ERR(PM_ERR_MEMORY, NULL));
+
+ hash->list = NULL;
+ hash->entries = 0;
+ hash->buckets = 0;
+
+ loopsize = sizeof(prime_list) / sizeof(*prime_list);
+ for(i = 0; i < loopsize; i++) {
+ if(prime_list[i] > size) {
+ hash->buckets = prime_list[i];
+ break;
+ }
+ }
+
+ if(hash->buckets < size) {
+ _alpm_log(PM_LOG_ERROR, _("database larger than maximum size"));
+ free(hash);
+ return(NULL);
+ }
+
+ CALLOC(hash->hash_table, hash->buckets, sizeof(alpm_list_t*), \
+ free(hash); RET_ERR(PM_ERR_MEMORY, NULL));
+
+ return(hash);
+}
+
+static size_t get_hash_position(unsigned long name_hash, pmpkghash_t *hash)
+{
+ size_t position;
+ alpm_list_t *ptr;
+
+ position = name_hash % hash->buckets;
+
+ /* collision resolution using open addressing with linear probing */
+ while((ptr = hash->hash_table[position]) != NULL) {
+ position = (position + 1) % hash->buckets;
+ }
+
+ return(position);
+}
+
+/* Expand the hash table size to the next increment and rebin the entries */
+static pmpkghash_t *rehash(pmpkghash_t *oldhash)
+{
+ pmpkghash_t *newhash;
+ size_t newsize, position, i;
+
+ /* Hash tables will need resized in two cases:
+ * - adding packages to the local database
+ * - poor estimation of the number of packages in sync database
+ *
+ * For small hash tables sizes (<500) the increase in size is by a
+ * minimum of a factor of 2 for optimal rehash efficiency. For
+ * larger database sizes, this increase is reduced to avoid excess
+ * memory allocation as both scenarios requiring a rehash should not
+ * require a table size increase that large. */
+ if(oldhash->buckets < 500) {
+ newsize = oldhash->buckets * 2;
+ } else if(oldhash->buckets < 2000) {
+ newsize = oldhash->buckets * 3 / 2;
+ } else if(oldhash->buckets < 5000) {
+ newsize = oldhash->buckets * 4 / 3;
+ } else {
+ newsize = oldhash->buckets + 1;
+ }
+
+ newhash = _alpm_pkghash_create(newsize);
+ if(newhash == NULL) {
+ /* creation of newhash failed, stick with old one... */
+ return(oldhash);
+ }
+
+ newhash->list = oldhash->list;
+ oldhash->list = NULL;
+
+ for(i = 0; i < oldhash->buckets; i++) {
+ if(oldhash->hash_table[i] != NULL) {
+ pmpkg_t *package = oldhash->hash_table[i]->data;
+
+ position = get_hash_position(package->name_hash, newhash);
+
+ newhash->hash_table[position] = oldhash->hash_table[i];
+ oldhash->hash_table[i] = NULL;
+ }
+ }
+
+ newhash->entries = oldhash->entries;
+
+ _alpm_pkghash_free(oldhash);
+
+ return(newhash);
+}
+
+pmpkghash_t *_alpm_pkghash_add(pmpkghash_t *hash, pmpkg_t *pkg)
+{
+ alpm_list_t *ptr;
+ size_t position;
+
+ if(pkg == NULL || hash == NULL) {
+ return(hash);
+ }
+
+ if((hash->entries + 1) / MAX_HASH_LOAD > hash->buckets) {
+ hash = rehash(hash);
+ }
+
+ position = get_hash_position(pkg->name_hash, hash);
+
+ ptr = calloc(1, sizeof(alpm_list_t));
+ if(ptr == NULL) {
+ return(hash);
+ }
+
+ ptr->data = pkg;
+ ptr->next = NULL;
+ ptr->prev = ptr;
+
+ hash->hash_table[position] = ptr;
+ hash->list = alpm_list_join(hash->list, ptr);
+ hash->entries += 1;
+
+ return(hash);
+}
+
+pmpkghash_t *_alpm_pkghash_add_sorted(pmpkghash_t *hash, pmpkg_t *pkg)
+{
+ if(!hash) {
+ return(_alpm_pkghash_add(hash, pkg));
+ }
+
+ alpm_list_t *ptr;
+ size_t position;
+
+ if((hash->entries + 1) / MAX_HASH_LOAD > hash->buckets) {
+ hash = rehash(hash);
+ }
+
+ position = get_hash_position(pkg->name_hash, hash);
+
+ ptr = calloc(1, sizeof(alpm_list_t));
+ if(ptr == NULL) {
+ return(hash);
+ }
+
+ ptr->data = pkg;
+ ptr->next = NULL;
+ ptr->prev = ptr;
+
+ hash->hash_table[position] = ptr;
+ hash->list = alpm_list_mmerge(hash->list, ptr, _alpm_pkg_cmp);
+ hash->entries += 1;
+
+ return(hash);
+}
+
+static size_t move_one_entry(pmpkghash_t *hash, size_t start, size_t end)
+{
+ /* Iterate backwards from 'end' to 'start', seeing if any of the items
+ * would hash to 'start'. If we find one, we move it there and break. If
+ * we get all the way back to position and find none that hash to it, we
+ * also end iteration. Iterating backwards helps prevent needless shuffles;
+ * we will never need to move more than one item per function call. The
+ * return value is our current iteration location; if this is equal to
+ * 'start' we can stop this madness. */
+ while(end != start) {
+ alpm_list_t *i = hash->hash_table[end];
+ pmpkg_t *info = i->data;
+ size_t new_position = get_hash_position(info->name_hash, hash);
+
+ if(new_position == start) {
+ hash->hash_table[start] = i;
+ hash->hash_table[end] = NULL;
+ break;
+ }
+
+ /* the odd math ensures we are always positive, e.g.
+ * e.g. (0 - 1) % 47 == -1
+ * e.g. (47 + 0 - 1) % 47 == 46 */
+ end = (hash->buckets + end - 1) % hash->buckets;
+ }
+ return(end);
+}
+
+/**
+ * @brief Remove a package from a pkghash.
+ *
+ * @param hash the hash to remove the package from
+ * @param pkg the package we are removing
+ * @param data output parameter containing the removed item
+ *
+ * @return the resultant hash
+ */
+pmpkghash_t *_alpm_pkghash_remove(pmpkghash_t *hash, pmpkg_t *pkg,
+ pmpkg_t **data)
+{
+ alpm_list_t *i;
+ size_t position;
+
+ if(data) {
+ *data = NULL;
+ }
+
+ if(pkg == NULL || hash == NULL) {
+ return(hash);
+ }
+
+ position = pkg->name_hash % hash->buckets;
+ while((i = hash->hash_table[position]) != NULL) {
+ pmpkg_t *info = i->data;
+
+ if(info->name_hash == pkg->name_hash &&
+ strcmp(info->name, pkg->name) == 0) {
+ size_t stop, prev;
+
+ /* remove from list and hash */
+ hash->list = alpm_list_remove_item(hash->list, i);
+ if(data) {
+ *data = info;
+ }
+ hash->hash_table[position] = NULL;
+ free(i);
+ hash->entries -= 1;
+
+ /* Potentially move entries following removed entry to keep open
+ * addressing collision resolution working. We start by finding the
+ * next null bucket to know how far we have to look. */
+ stop = (position + 1) % hash->buckets;
+ while(hash->hash_table[stop] != NULL && stop != position) {
+ stop = (stop + 1) % hash->buckets;
+ }
+ stop = (hash->buckets + stop - 1) % hash->buckets;
+
+ /* We now search backwards from stop to position. If we find an
+ * item that now hashes to position, we will move it, and then try
+ * to plug the new hole we just opened up, until we finally don't
+ * move anything. */
+ while((prev = move_one_entry(hash, position, stop)) != position) {
+ position = prev;
+ }
+
+ return(hash);
+ }
+
+ position = (position + 1) % hash->buckets;
+ }
+
+ return(hash);
+}
+
+void _alpm_pkghash_free(pmpkghash_t *hash)
+{
+ size_t i;
+ if(hash != NULL) {
+ for(i = 0; i < hash->buckets; i++) {
+ free(hash->hash_table[i]);
+ }
+ free(hash->hash_table);
+ }
+ free(hash);
+}
+
+pmpkg_t *_alpm_pkghash_find(pmpkghash_t *hash, const char *name)
+{
+ alpm_list_t *lp;
+ unsigned long name_hash;
+ size_t position;
+
+ ALPM_LOG_FUNC;
+
+ if(name == NULL || hash == NULL) {
+ return(NULL);
+ }
+
+ name_hash = _alpm_hash_sdbm(name);
+
+ position = name_hash % hash->buckets;
+
+ while((lp = hash->hash_table[position]) != NULL) {
+ pmpkg_t *info = lp->data;
+
+ if(info->name_hash == name_hash && strcmp(info->name, name) == 0) {
+ return(info);
+ }
+
+ position = (position + 1) % hash->buckets;
+ }
+
+ return(NULL);
+}
diff --git a/lib/libalpm/pkghash.h b/lib/libalpm/pkghash.h
new file mode 100644
index 00000000..a6c1db71
--- /dev/null
+++ b/lib/libalpm/pkghash.h
@@ -0,0 +1,58 @@
+/*
+ * pkghash.h
+ *
+ * Copyright (c) 2011 Pacman Development Team <pacman-dev@archlinux.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _ALPM_PKGHASH_H
+#define _ALPM_PKGHASH_H
+
+#include <stdlib.h>
+
+#include "alpm.h"
+#include "alpm_list.h"
+
+
+/**
+ * @brief A hash table for holding pmpkg_t objects.
+ *
+ * A combination of a hash table and a list, allowing for fast look-up
+ * by package name but also iteration over the packages.
+ */
+struct __pmpkghash_t {
+ /** data held by the hash table */
+ alpm_list_t **hash_table;
+ /** number of buckets in hash table */
+ size_t buckets;
+ /** number of entries in hash table */
+ size_t entries;
+ /** head node of the hash table data in normal list format */
+ alpm_list_t *list;
+};
+
+pmpkghash_t *_alpm_pkghash_create(size_t size);
+
+pmpkghash_t *_alpm_pkghash_add(pmpkghash_t *hash, pmpkg_t *pkg);
+pmpkghash_t *_alpm_pkghash_add_sorted(pmpkghash_t *hash, pmpkg_t *pkg);
+pmpkghash_t *_alpm_pkghash_remove(pmpkghash_t *hash, pmpkg_t *pkg, pmpkg_t **data);
+
+void _alpm_pkghash_free(pmpkghash_t *hash);
+
+pmpkg_t *_alpm_pkghash_find(pmpkghash_t *hash, const char *name);
+
+#define MAX_HASH_LOAD 0.7
+
+#endif /* _ALPM_PKGHASH_H */
diff --git a/lib/libalpm/remove.c b/lib/libalpm/remove.c
index 5def92a6..823795be 100644
--- a/lib/libalpm/remove.c
+++ b/lib/libalpm/remove.c
@@ -95,7 +95,7 @@ static void remove_prepare_cascade(pmtrans_t *trans, pmdb_t *db,
}
alpm_list_free_inner(lp, (alpm_list_fn_free)_alpm_depmiss_free);
alpm_list_free(lp);
- lp = alpm_checkdeps(_alpm_db_get_pkgcache(db), 1, trans->remove, NULL);
+ lp = alpm_checkdeps(_alpm_db_get_pkgcache_list(db), 1, trans->remove, NULL);
}
}
@@ -125,7 +125,7 @@ static void remove_prepare_keep_needed(pmtrans_t *trans, pmdb_t *db,
}
alpm_list_free_inner(lp, (alpm_list_fn_free)_alpm_depmiss_free);
alpm_list_free(lp);
- lp = alpm_checkdeps(_alpm_db_get_pkgcache(db), 1, trans->remove, NULL);
+ lp = alpm_checkdeps(_alpm_db_get_pkgcache_list(db), 1, trans->remove, NULL);
}
}
@@ -147,7 +147,7 @@ int _alpm_remove_prepare(pmtrans_t *trans, pmdb_t *db, alpm_list_t **data)
EVENT(trans, PM_TRANS_EVT_CHECKDEPS_START, NULL, NULL);
_alpm_log(PM_LOG_DEBUG, "looking for unsatisfied dependencies\n");
- lp = alpm_checkdeps(_alpm_db_get_pkgcache(db), 1, trans->remove, NULL);
+ lp = alpm_checkdeps(_alpm_db_get_pkgcache_list(db), 1, trans->remove, NULL);
if(lp != NULL) {
if(trans->flags & PM_TRANS_FLAG_CASCADE) {
diff --git a/lib/libalpm/sync.c b/lib/libalpm/sync.c
index 9f5bec3b..859b8c94 100644
--- a/lib/libalpm/sync.c
+++ b/lib/libalpm/sync.c
@@ -102,7 +102,7 @@ int SYMEXPORT alpm_sync_sysupgrade(int enable_downgrade)
ASSERT(trans->state == STATE_INITIALIZED, RET_ERR(PM_ERR_TRANS_NOT_INITIALIZED, -1));
_alpm_log(PM_LOG_DEBUG, "checking for package upgrades\n");
- for(i = _alpm_db_get_pkgcache(db_local); i; i = i->next) {
+ for(i = _alpm_db_get_pkgcache_list(db_local); i; i = i->next) {
pmpkg_t *lpkg = i->data;
if(_alpm_pkg_find(trans->add, lpkg->name)) {
@@ -149,7 +149,7 @@ int SYMEXPORT alpm_sync_sysupgrade(int enable_downgrade)
break; /* jump to next local package */
} else { /* 2. search for replacers in sdb */
int found = 0;
- for(k = _alpm_db_get_pkgcache(sdb); k; k = k->next) {
+ for(k = _alpm_db_get_pkgcache_list(sdb); k; k = k->next) {
spkg = k->data;
if(alpm_list_find_str(alpm_pkg_get_replaces(spkg), lpkg->name)) {
found = 1;
@@ -331,7 +331,7 @@ int _alpm_sync_prepare(pmtrans_t *trans, pmdb_t *db_local, alpm_list_t *dbs_sync
}
/* Compute the fake local database for resolvedeps (partial fix for the phonon/qt issue) */
- alpm_list_t *localpkgs = alpm_list_diff(_alpm_db_get_pkgcache(db_local), trans->add, _alpm_pkg_cmp);
+ alpm_list_t *localpkgs = alpm_list_diff(_alpm_db_get_pkgcache_list(db_local), trans->add, _alpm_pkg_cmp);
/* Resolve packages in the transaction one at a time, in addtion
building up a list of packages which could not be resolved. */
@@ -518,7 +518,7 @@ int _alpm_sync_prepare(pmtrans_t *trans, pmdb_t *db_local, alpm_list_t *dbs_sync
if(!(trans->flags & PM_TRANS_FLAG_NODEPS)) {
_alpm_log(PM_LOG_DEBUG, "checking dependencies\n");
- deps = alpm_checkdeps(_alpm_db_get_pkgcache(db_local), 1, trans->remove, trans->add);
+ deps = alpm_checkdeps(_alpm_db_get_pkgcache_list(db_local), 1, trans->remove, trans->add);
if(deps) {
pm_errno = PM_ERR_UNSATISFIED_DEPS;
ret = -1;

Copyright © 2002-2022 Judd Vinet and Aaron Griffin. Copyright © 2022 Erich Eckner.
The Arch Linux name and logo are recognized trademarks. Some rights reserved. The registered trademark Linux® is used pursuant to a sublicense from LMI, the exclusive licensee of Linus Torvalds, owner of the mark on a world-wide basis.