diff options
Diffstat (limited to 'json-glib/json-value.c')
| -rw-r--r-- | json-glib/json-value.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/json-glib/json-value.c b/json-glib/json-value.c index 148cf8d..e636499 100644 --- a/json-glib/json-value.c +++ b/json-glib/json-value.c @@ -186,6 +186,51 @@ json_value_seal (JsonValue *value) value->immutable = TRUE; } +guint +json_value_hash (gconstpointer key) +{ + JsonValue *value; + guint value_hash; + guint type_hash; + + value = (JsonValue *) key; + + /* Hash the type and value separately. + * Use the top 3 bits to store the type. */ + type_hash = value->type << (sizeof (guint) * 8 - 3); + + switch (value->type) + { + case JSON_VALUE_NULL: + value_hash = 0; + break; + case JSON_VALUE_BOOLEAN: + value_hash = json_value_get_boolean (value) ? 1 : 0; + break; + case JSON_VALUE_STRING: + value_hash = json_string_hash (json_value_get_string (value)); + break; + case JSON_VALUE_INT: { + gint64 v = json_value_get_int (value); + value_hash = g_int64_hash (&v); + break; + } + case JSON_VALUE_DOUBLE: { + gdouble v = json_value_get_double (value); + value_hash = g_double_hash (&v); + break; + } + case JSON_VALUE_INVALID: + default: + g_assert_not_reached (); + } + + /* Mask out the top 3 bits of the @value_hash. */ + value_hash &= ~(7 << (sizeof (guint) * 8 - 3)); + + return (type_hash | value_hash); +} + #define _JSON_VALUE_DEFINE_SET(Type,EType,CType,VField) \ void \ json_value_set_##Type (JsonValue *value, CType VField) \ |