--- /dev/null
+/*
+ * attributes.c
+ *
+ * Babeltrace CTF writer - Attributes
+ *
+ * Copyright (c) 2015 EfficiOS Inc. and Linux Foundation
+ * Copyright (c) 2015 Philippe Proulx <pproulx@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#define BT_LOG_TAG "CTF-WRITER-ATTRS"
+#include <babeltrace/lib-logging-internal.h>
+
+#include <babeltrace/assert-internal.h>
+#include <babeltrace/babeltrace-internal.h>
+#include <babeltrace/compat/string-internal.h>
+#include <babeltrace/ref.h>
+#include <babeltrace/values-internal.h>
+#include <babeltrace/values.h>
+#include <inttypes.h>
+
+#define BT_CTF_ATTR_NAME_INDEX 0
+#define BT_CTF_ATTR_VALUE_INDEX 1
+
+BT_HIDDEN
+struct bt_value *bt_ctf_attributes_create(void)
+{
+ struct bt_value *attr_obj;
+
+ /*
+ * Attributes: array value object of array value objects, each one
+ * containing two entries: a string value object (attributes
+ * field name), and a value object (attributes field value).
+ *
+ * Example (JSON representation):
+ *
+ * [
+ * ["hostname", "eeppdesk"],
+ * ["sysname", "Linux"],
+ * ["tracer_major", 2],
+ * ["tracer_minor", 5]
+ * ]
+ */
+ BT_LOGD_STR("Creating attributes object.");
+ attr_obj = bt_value_array_create();
+ if (!attr_obj) {
+ BT_LOGE_STR("Failed to create array value.");
+ } else {
+ BT_LOGD("Created attributes object: addr=%p",
+ attr_obj);
+ }
+
+ return attr_obj;
+}
+
+BT_HIDDEN
+void bt_ctf_attributes_destroy(struct bt_value *attr_obj)
+{
+ BT_LOGD("Destroying attributes object: addr=%p", attr_obj);
+ bt_put(attr_obj);
+}
+
+BT_HIDDEN
+int64_t bt_ctf_attributes_get_count(struct bt_value *attr_obj)
+{
+ return bt_value_array_size(attr_obj);
+}
+
+BT_HIDDEN
+const char *bt_ctf_attributes_get_field_name(struct bt_value *attr_obj,
+ uint64_t index)
+{
+ int rc;
+ const char *ret = NULL;
+ struct bt_value *attr_field_obj = NULL;
+ struct bt_value *attr_field_name_obj = NULL;
+
+ if (!attr_obj) {
+ BT_LOGW_STR("Invalid parameter: attributes object is NULL.");
+ goto end;
+ }
+
+ if (index >= bt_value_array_size(attr_obj)) {
+ BT_LOGW("Invalid parameter: index is out of bounds: "
+ "index=%" PRIu64 ", count=%" PRId64,
+ index, bt_value_array_size(attr_obj));
+ goto end;
+ }
+
+ attr_field_obj = bt_value_array_borrow(attr_obj, index);
+ if (!attr_field_obj) {
+ BT_LOGE("Cannot get attributes object's array value's element by index: "
+ "value-addr=%p, index=%" PRIu64, attr_obj, index);
+ goto end;
+ }
+
+ attr_field_name_obj = bt_value_array_borrow(attr_field_obj,
+ BT_CTF_ATTR_NAME_INDEX);
+ if (!attr_field_name_obj) {
+ BT_LOGE("Cannot get attribute array value's element by index: "
+ "value-addr=%p, index=%" PRIu64, attr_field_obj,
+ (uint64_t) BT_CTF_ATTR_NAME_INDEX);
+ goto end;
+ }
+
+ rc = bt_value_string_get(attr_field_name_obj, &ret);
+ if (rc) {
+ BT_LOGE("Cannot get raw value from string value: value-addr=%p",
+ attr_field_name_obj);
+ ret = NULL;
+ }
+
+end:
+ return ret;
+}
+
+BT_HIDDEN
+struct bt_value *bt_ctf_attributes_borrow_field_value(struct bt_value *attr_obj,
+ uint64_t index)
+{
+ struct bt_value *value_obj = NULL;
+ struct bt_value *attr_field_obj = NULL;
+
+ if (!attr_obj) {
+ BT_LOGW_STR("Invalid parameter: attributes object is NULL.");
+ goto end;
+ }
+
+ if (index >= bt_value_array_size(attr_obj)) {
+ BT_LOGW("Invalid parameter: index is out of bounds: "
+ "index=%" PRIu64 ", count=%" PRId64,
+ index, bt_value_array_size(attr_obj));
+ goto end;
+ }
+
+ attr_field_obj = bt_value_array_borrow(attr_obj, index);
+ if (!attr_field_obj) {
+ BT_LOGE("Cannot get attributes object's array value's element by index: "
+ "value-addr=%p, index=%" PRIu64, attr_obj, index);
+ goto end;
+ }
+
+ value_obj = bt_value_array_borrow(attr_field_obj,
+ BT_CTF_ATTR_VALUE_INDEX);
+ if (!value_obj) {
+ BT_LOGE("Cannot get attribute array value's element by index: "
+ "value-addr=%p, index=%" PRIu64, attr_field_obj,
+ (uint64_t) BT_CTF_ATTR_VALUE_INDEX);
+ }
+
+end:
+ return value_obj;
+}
+
+static
+struct bt_value *bt_ctf_attributes_borrow_field_by_name(
+ struct bt_value *attr_obj, const char *name)
+{
+ uint64_t i;
+ int64_t attr_size;
+ struct bt_value *value_obj = NULL;
+ struct bt_value *attr_field_name_obj = NULL;
+
+ attr_size = bt_value_array_size(attr_obj);
+ if (attr_size < 0) {
+ BT_LOGE("Cannot get array value's size: value-addr=%p",
+ attr_obj);
+ goto error;
+ }
+
+ for (i = 0; i < attr_size; ++i) {
+ int ret;
+ const char *field_name;
+
+ value_obj = bt_value_array_borrow(attr_obj, i);
+ if (!value_obj) {
+ BT_LOGE("Cannot get attributes object's array value's element by index: "
+ "value-addr=%p, index=%" PRIu64, attr_obj, i);
+ goto error;
+ }
+
+ attr_field_name_obj = bt_value_array_borrow(value_obj,
+ BT_CTF_ATTR_NAME_INDEX);
+ if (!attr_field_name_obj) {
+ BT_LOGE("Cannot get attribute array value's element by index: "
+ "value-addr=%p, index=%" PRIu64,
+ value_obj, (int64_t) BT_CTF_ATTR_NAME_INDEX);
+ goto error;
+ }
+
+ ret = bt_value_string_get(attr_field_name_obj, &field_name);
+ if (ret) {
+ BT_LOGE("Cannot get raw value from string value: value-addr=%p",
+ attr_field_name_obj);
+ goto error;
+ }
+
+ if (!strcmp(field_name, name)) {
+ break;
+ }
+
+ value_obj = NULL;
+ }
+
+ return value_obj;
+
+error:
+ value_obj = NULL;
+ return value_obj;
+}
+
+BT_HIDDEN
+int bt_ctf_attributes_set_field_value(struct bt_value *attr_obj,
+ const char *name, struct bt_value *value_obj)
+{
+ int ret = 0;
+ struct bt_value *attr_field_obj = NULL;
+
+ if (!attr_obj || !name || !value_obj) {
+ BT_LOGW("Invalid parameter: attributes object, name, or value object is NULL: "
+ "attr-value-addr=%p, name-addr=%p, value-addr=%p",
+ attr_obj, name, value_obj);
+ ret = -1;
+ goto end;
+ }
+
+ attr_field_obj = bt_ctf_attributes_borrow_field_by_name(attr_obj, name);
+ if (attr_field_obj) {
+ ret = bt_value_array_set(attr_field_obj,
+ BT_CTF_ATTR_VALUE_INDEX, value_obj);
+ attr_field_obj = NULL;
+ goto end;
+ }
+
+ attr_field_obj = bt_value_array_create();
+ if (!attr_field_obj) {
+ BT_LOGE_STR("Failed to create empty array value.");
+ ret = -1;
+ goto end;
+ }
+
+ ret = bt_value_array_append_string(attr_field_obj, name);
+ ret |= bt_value_array_append(attr_field_obj, value_obj);
+ if (ret) {
+ BT_LOGE("Cannot append elements to array value: addr=%p",
+ attr_field_obj);
+ goto end;
+ }
+
+ ret = bt_value_array_append(attr_obj, attr_field_obj);
+ if (ret) {
+ BT_LOGE("Cannot append element to array value: "
+ "array-value-addr=%p, element-value-addr=%p",
+ attr_obj, attr_field_obj);
+ }
+
+end:
+ bt_put(attr_field_obj);
+ return ret;
+}
+
+BT_HIDDEN
+struct bt_value *bt_ctf_attributes_borrow_field_value_by_name(
+ struct bt_value *attr_obj, const char *name)
+{
+ struct bt_value *value_obj = NULL;
+ struct bt_value *attr_field_obj = NULL;
+
+ if (!attr_obj || !name) {
+ BT_LOGW("Invalid parameter: attributes object or name is NULL: "
+ "value-addr=%p, name-addr=%p", attr_obj, name);
+ goto end;
+ }
+
+ attr_field_obj = bt_ctf_attributes_borrow_field_by_name(attr_obj, name);
+ if (!attr_field_obj) {
+ BT_LOGD("Cannot find attributes object's field by name: "
+ "value-addr=%p, name=\"%s\"", attr_obj, name);
+ goto end;
+ }
+
+ value_obj = bt_value_array_borrow(attr_field_obj,
+ BT_CTF_ATTR_VALUE_INDEX);
+ if (!value_obj) {
+ BT_LOGE("Cannot get attribute array value's element by index: "
+ "value-addr=%p, index=%" PRIu64, attr_field_obj,
+ (uint64_t) BT_CTF_ATTR_VALUE_INDEX);
+ }
+
+end:
+ return value_obj;
+}
+
+BT_HIDDEN
+int bt_ctf_attributes_freeze(struct bt_value *attr_obj)
+{
+ uint64_t i;
+ int64_t count;
+ int ret = 0;
+
+ if (!attr_obj) {
+ BT_LOGW_STR("Invalid parameter: attributes object is NULL.");
+ ret = -1;
+ goto end;
+ }
+
+ BT_LOGD("Freezing attributes object: value-addr=%p", attr_obj);
+ count = bt_value_array_size(attr_obj);
+ BT_ASSERT(count >= 0);
+
+ /*
+ * We do not freeze the array value object itself here, since
+ * internal stuff could need to modify/add attributes. Each
+ * attribute is frozen one by one.
+ */
+ for (i = 0; i < count; ++i) {
+ struct bt_value *obj = NULL;
+
+ obj = bt_ctf_attributes_borrow_field_value(attr_obj, i);
+ if (!obj) {
+ BT_LOGE("Cannot get attributes object's field value by index: "
+ "value-addr=%p, index=%" PRIu64,
+ attr_obj, i);
+ ret = -1;
+ goto end;
+ }
+
+ bt_value_freeze(obj);
+ }
+
+end:
+ return ret;
+}
projects / babeltrace.git / blobdiff