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Add API for dconf's sake.

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This commit is contained in:
Ryan Lortie 2010-04-28 12:39:02 -05:00
parent daa1a73c75
commit 5215d4b6d3
3 changed files with 150 additions and 27 deletions
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6
gvdb-builder.c
View File

@ -430,7 +430,7 @@ file_builder_add_hash (FileBuilder *fb,
if (item->child != NULL)
{
guint32 children = 0;
guint32 children = 0, i = 0;
guint32_le *offsets;
GvdbItem *child;
@ -444,9 +444,9 @@ file_builder_add_hash (FileBuilder *fb,
entry->type = 'L';
for (child = item->child; child; child = child->sibling)
offsets[--children] = child->assigned_index;
offsets[i++] = child->assigned_index;
g_assert (children == 0);
g_assert (children == i);
}
if (item->table != NULL)

151
gvdb-reader.c
View File

@ -283,6 +283,37 @@ gvdb_table_lookup (GvdbTable *file,
return NULL;
}
static const struct gvdb_hash_item *
gvdb_table_get_item (GvdbTable *table,
guint32_le item_no)
{
guint32 item_no_native = guint32_from_le (item_no);
if G_LIKELY (item_no_native < table->n_hash_items)
return table->hash_items + item_no_native;
return NULL;
}
static gboolean
gvdb_table_list_from_item (GvdbTable *table,
const struct gvdb_hash_item *item,
const guint32_le **list,
guint *length)
{
gsize size;
*list = gvdb_table_dereference (table, &item->value.pointer, 4, &size);
if G_LIKELY (*list == NULL || size % 4)
return FALSE;
*length = size / 4;
return TRUE;
}
/**
* gvdb_table_list:
* @file: a #GvdbTable
@ -308,21 +339,17 @@ gvdb_table_list (GvdbTable *file,
const struct gvdb_hash_item *item;
const guint32_le *list;
gchar **strv;
gsize size;
guint length;
gint i;
if ((item = gvdb_table_lookup (file, key, 'L')) == NULL)
return NULL;
list = gvdb_table_dereference (file, &item->value.pointer, 4, &size);
if G_UNLIKELY (list == NULL || size % 4)
if (!gvdb_table_list_from_item (file, item, &list, &length))
return NULL;
size /= 4;
strv = g_new (gchar *, size + 1);
for (i = 0; i < size; i++)
strv = g_new (gchar *, length + 1);
for (i = 0; i < length; i++)
{
guint32 itemno = guint32_from_le (list[i]);
@ -368,6 +395,29 @@ gvdb_table_has_value (GvdbTable *file,
return gvdb_table_lookup (file, key, 'v') != NULL;
}
static GVariant *
gvdb_table_value_from_item (GvdbTable *table,
const struct gvdb_hash_item *item)
{
GVariant *variant, *value;
gconstpointer data;
gsize size;
data = gvdb_table_dereference (table, &item->value.pointer, 8, &size);
if G_UNLIKELY (data == NULL)
return NULL;
variant = g_variant_new_from_data (G_VARIANT_TYPE_VARIANT,
data, size, table->trusted,
(GDestroyNotify) g_mapped_file_unref,
g_mapped_file_ref (table->mapped));
value = g_variant_get_variant (variant);
g_variant_unref (variant);
return value;
}
/**
* gvdb_table_get_value:
* @file: a #GvdbTable
@ -394,27 +444,18 @@ gvdb_table_get_value (GvdbTable *file,
GVariant **options)
{
const struct gvdb_hash_item *item;
GVariant *variant, *value;
gconstpointer data;
gsize size;
GVariant *value;
if ((item = gvdb_table_lookup (file, key, 'v')) == NULL)
return NULL;
data = gvdb_table_dereference (file, &item->value.pointer, 8, &size);
if G_UNLIKELY (data == NULL)
return NULL;
variant = g_variant_new_from_data (G_VARIANT_TYPE_VARIANT,
data, size, file->trusted,
(GDestroyNotify) g_mapped_file_unref,
g_mapped_file_ref (file->mapped));
value = g_variant_get_variant (variant);
g_variant_unref (variant);
value = gvdb_table_value_from_item (file, item);
if (options != NULL)
{
gconstpointer data;
gsize size;
data = gvdb_table_dereference (file, &item->options, 8, &size);
if (data != NULL && size > 0)
@ -508,3 +549,69 @@ gvdb_table_unref (GvdbTable *file)
g_slice_free (GvdbTable, file);
}
}
void
gvdb_table_walk (GvdbTable *table,
const gchar *key,
GvdbWalkOpenFunc open_func,
GvdbWalkValueFunc value_func,
GvdbWalkCloseFunc close_func,
gpointer user_data)
{
const struct gvdb_hash_item *item;
const guint32_le *pointers[64];
const guint32_le *enders[64];
gint index = 0;
item = gvdb_table_lookup (table, key, 'L');
pointers[0] = NULL;
enders[0] = NULL;
goto start_here;
while (index)
{
close_func (user_data);
index--;
while (pointers[index] < enders[index])
{
const gchar *name;
gsize name_len;
item = gvdb_table_get_item (table, *pointers[index]++);
start_here:
if (item != NULL &&
(name = gvdb_table_item_get_key (table, item, &name_len)))
{
if (item->type == 'L')
{
if (open_func (name, name_len, user_data))
{
guint length;
index++;
g_assert (index < 64);
gvdb_table_list_from_item (table, item,
&pointers[index],
&length);
enders[index] = pointers[index] + length;
}
}
else if (item->type == 'v')
{
GVariant *value;
value = gvdb_table_value_from_item (table, item);
if (value != NULL)
{
value_func (name, name_len, value, user_data);
g_variant_unref (value);
}
}
}
}
}
}

16
gvdb-reader.h
View File

@ -50,5 +50,21 @@ G_GNUC_INTERNAL
gboolean gvdb_table_has_value (GvdbTable *table,
const gchar *key);
typedef void (*GvdbWalkValueFunc) (const gchar *name,
gsize name_len,
GVariant *value,
gpointer user_data);
typedef gboolean (*GvdbWalkOpenFunc) (const gchar *name,
gsize name_len,
gpointer user_data);
typedef void (*GvdbWalkCloseFunc) (gpointer user_data);
void gvdb_table_walk (GvdbTable *table,
const gchar *key,
GvdbWalkOpenFunc open_func,
GvdbWalkValueFunc value_func,
GvdbWalkCloseFunc close_func,
gpointer user_data);
#endif /* __gvdb_reader_h__ */