[Qemu-devel] [PATCH 3/6] QDict: Introduce qdict_copy()

[Luiz Capitulino <lcapitulino@redhat.com>]

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---
 check-qdict.c |   29 +++++++++++++++++++++++++++++
 qdict.c       |   18 ++++++++++++++++++
 qdict.h       |    1 +
 3 files changed, 48 insertions(+), 0 deletions(-)

diff --git a/check-qdict.c b/check-qdict.c
index fc0d276..12c73ab 100644
--- a/check-qdict.c
+++ b/check-qdict.c
@@ -227,6 +227,34 @@ static void qdict_iterapi_test(void)
     QDECREF(tests_dict);
 }
 
+static void qdict_copy_test(void)
+{
+    QDict *tests_dict = qdict_new();
+    const QDictEntry *ent;
+    QDict *new;
+    int i;
+
+    for (i = 0; i < 1024; i++) {
+        char key[32];
+
+        snprintf(key, sizeof(key), "key%d", i);
+        qdict_put(tests_dict, key, qint_from_int(i));
+    }
+
+    new = qdict_copy(tests_dict);
+
+    g_assert(qdict_size(new) == qdict_size(tests_dict));
+    for (ent = qdict_first(tests_dict); ent; ent = qdict_next(tests_dict, ent)){
+        const char *key = qdict_entry_key(ent);
+
+        g_assert(qdict_haskey(new, key) == 1);
+        g_assert(qdict_get_int(new, key) == qdict_get_int(tests_dict, key));
+    }
+
+    QDECREF(new);
+    QDECREF(tests_dict);
+}
+
 /*
  * Errors test-cases
  */
@@ -365,6 +393,7 @@ int main(int argc, char **argv)
     g_test_add_func("/public/del", qdict_del_test);
     g_test_add_func("/public/to_qdict", qobject_to_qdict_test);
     g_test_add_func("/public/iterapi", qdict_iterapi_test);
+    g_test_add_func("/public/copy", qdict_copy_test);
 
     g_test_add_func("/errors/put_exists", qdict_put_exists_test);
     g_test_add_func("/errors/get_not_exists", qdict_get_not_exists_test);
diff --git a/qdict.c b/qdict.c
index 4bf308b..dc9141f 100644
--- a/qdict.c
+++ b/qdict.c
@@ -401,6 +401,24 @@ const QDictEntry *qdict_next(const QDict *qdict, const QDictEntry *entry)
 }
 
 /**
+ * qdict_copy(): Build a new dictionary from an existing one.
+ */
+QDict *qdict_copy(const QDict *from)
+{
+    const QDictEntry *ent;
+    QDict *new;
+
+    new = qdict_new();
+
+    for (ent = qdict_first(from); ent; ent = qdict_next(from, ent)) {
+        qdict_put_obj(new, qdict_entry_key(ent), qdict_entry_value(ent));
+        qobject_incref(qdict_entry_value(ent));
+    }
+
+    return new;
+}
+
+/**
  * qentry_destroy(): Free all the memory allocated by a QDictEntry
  */
 static void qentry_destroy(QDictEntry *e)
diff --git a/qdict.h b/qdict.h
index 929d8d2..9976a18 100644
--- a/qdict.h
+++ b/qdict.h
@@ -36,6 +36,7 @@ typedef struct QDict {
 QDict *qdict_new(void);
 const char *qdict_entry_key(const QDictEntry *entry);
 QObject *qdict_entry_value(const QDictEntry *entry);
+QDict *qdict_copy(const QDict *from);
 size_t qdict_size(const QDict *qdict);
 void qdict_put_obj(QDict *qdict, const char *key, QObject *value);
 void qdict_del(QDict *qdict, const char *key);
-- 
1.7.9.111.gf3fb0.dirty