X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;ds=sidebyside;f=src%2Fecoli_node_once.c;fp=src%2Fecoli_node_once.c;h=989c710d5f22c2afdbce342ba51b916c084df038;hb=18d03456d96f7a086a2ccc82ce97fcf056848d90;hp=0000000000000000000000000000000000000000;hpb=a1571d413d2acac5d4a4fbdf2e50b2d1a6da3aa6;p=protos%2Flibecoli.git

diff --git a/src/ecoli_node_once.c b/src/ecoli_node_once.c
new file mode 100644
index 0000000..989c710
--- /dev/null
+++ b/src/ecoli_node_once.c
@@ -0,0 +1,282 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2016, Olivier MATZ <zer0@droids-corp.org>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <stdarg.h>
+#include <errno.h>
+
+#include <ecoli_malloc.h>
+#include <ecoli_log.h>
+#include <ecoli_test.h>
+#include <ecoli_strvec.h>
+#include <ecoli_node.h>
+#include <ecoli_parse.h>
+#include <ecoli_complete.h>
+#include <ecoli_node_str.h>
+#include <ecoli_node_or.h>
+#include <ecoli_node_many.h>
+#include <ecoli_config.h>
+#include <ecoli_node_once.h>
+
+EC_LOG_TYPE_REGISTER(node_once);
+
+struct ec_node_once {
+	struct ec_node gen;
+	struct ec_node *child;
+};
+
+static unsigned int
+count_node(struct ec_parse *parse, const struct ec_node *node)
+{
+	struct ec_parse *child;
+	unsigned int count = 0;
+
+	if (parse == NULL)
+		return 0;
+
+	if (ec_parse_get_node(parse) == node)
+		count++;
+
+	EC_PARSE_FOREACH_CHILD(child, parse)
+		count += count_node(child, node);
+
+	return count;
+}
+
+static int
+ec_node_once_parse(const struct ec_node *gen_node,
+		struct ec_parse *state,
+		const struct ec_strvec *strvec)
+{
+	struct ec_node_once *node = (struct ec_node_once *)gen_node;
+	unsigned int count;
+
+	/* count the number of occurences of the node: if already parsed,
+	 * do not match
+	 */
+	count = count_node(ec_parse_get_root(state), node->child);
+	if (count > 0)
+		return EC_PARSE_NOMATCH;
+
+	return ec_node_parse_child(node->child, state, strvec);
+}
+
+static int
+ec_node_once_complete(const struct ec_node *gen_node,
+		struct ec_comp *comp,
+		const struct ec_strvec *strvec)
+{
+	struct ec_node_once *node = (struct ec_node_once *)gen_node;
+	struct ec_parse *parse = ec_comp_get_state(comp);
+	unsigned int count;
+	int ret;
+
+	/* count the number of occurences of the node: if already parsed,
+	 * do not match
+	 */
+	count = count_node(ec_parse_get_root(parse), node->child);
+	if (count > 0)
+		return 0;
+
+	ret = ec_node_complete_child(node->child, comp, strvec);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static void ec_node_once_free_priv(struct ec_node *gen_node)
+{
+	struct ec_node_once *node = (struct ec_node_once *)gen_node;
+
+	ec_node_free(node->child);
+}
+
+static size_t
+ec_node_once_get_children_count(const struct ec_node *gen_node)
+{
+	struct ec_node_once *node = (struct ec_node_once *)gen_node;
+
+	if (node->child)
+		return 1;
+	return 0;
+}
+
+static int
+ec_node_once_get_child(const struct ec_node *gen_node, size_t i,
+		struct ec_node **child, unsigned int *refs)
+{
+	struct ec_node_once *node = (struct ec_node_once *)gen_node;
+
+	if (i >= 1)
+		return -1;
+
+	*child = node->child;
+	*refs = 2;
+	return 0;
+}
+
+static const struct ec_config_schema ec_node_once_schema[] = {
+	{
+		.key = "child",
+		.desc = "The child node.",
+		.type = EC_CONFIG_TYPE_NODE,
+	},
+	{
+		.type = EC_CONFIG_TYPE_NONE,
+	},
+};
+
+static int ec_node_once_set_config(struct ec_node *gen_node,
+				const struct ec_config *config)
+{
+	struct ec_node_once *node = (struct ec_node_once *)gen_node;
+	const struct ec_config *child;
+
+	child = ec_config_dict_get(config, "child");
+	if (child == NULL)
+		goto fail;
+	if (ec_config_get_type(child) != EC_CONFIG_TYPE_NODE) {
+		errno = EINVAL;
+		goto fail;
+	}
+
+	if (node->child != NULL)
+		ec_node_free(node->child);
+	node->child = ec_node_clone(child->node);
+
+	return 0;
+
+fail:
+	return -1;
+}
+
+static struct ec_node_type ec_node_once_type = {
+	.name = "once",
+	.schema = ec_node_once_schema,
+	.set_config = ec_node_once_set_config,
+	.parse = ec_node_once_parse,
+	.complete = ec_node_once_complete,
+	.size = sizeof(struct ec_node_once),
+	.free_priv = ec_node_once_free_priv,
+	.get_children_count = ec_node_once_get_children_count,
+	.get_child = ec_node_once_get_child,
+};
+
+EC_NODE_TYPE_REGISTER(ec_node_once_type);
+
+int
+ec_node_once_set_child(struct ec_node *gen_node, struct ec_node *child)
+{
+	const struct ec_config *cur_config = NULL;
+	struct ec_config *config = NULL;
+	int ret;
+
+	if (ec_node_check_type(gen_node, &ec_node_once_type) < 0)
+		goto fail;
+
+	cur_config = ec_node_get_config(gen_node);
+	if (cur_config == NULL)
+		config = ec_config_dict();
+	else
+		config = ec_config_dup(cur_config);
+	if (config == NULL)
+		goto fail;
+
+	if (ec_config_dict_set(config, "child", ec_config_node(child)) < 0) {
+		child = NULL; /* freed */
+		goto fail;
+	}
+	child = NULL; /* freed */
+
+	ret = ec_node_set_config(gen_node, config);
+	config = NULL; /* freed */
+	if (ret < 0)
+		goto fail;
+
+	return 0;
+
+fail:
+	ec_config_free(config);
+	ec_node_free(child);
+	return -1;
+}
+
+struct ec_node *ec_node_once(const char *id, struct ec_node *child)
+{
+	struct ec_node *gen_node = NULL;
+
+	if (child == NULL)
+		return NULL;
+
+	gen_node = ec_node_from_type(&ec_node_once_type, id);
+	if (gen_node == NULL)
+		goto fail;
+
+	ec_node_once_set_child(gen_node, child);
+	child = NULL;
+
+	return gen_node;
+
+fail:
+	ec_node_free(child);
+	return NULL;
+}
+
+/* LCOV_EXCL_START */
+static int ec_node_once_testcase(void)
+{
+	struct ec_node *node;
+	int testres = 0;
+
+	node = ec_node_many(EC_NO_ID,
+			EC_NODE_OR(EC_NO_ID,
+				ec_node_once(EC_NO_ID, ec_node_str(EC_NO_ID, "foo")),
+				ec_node_str(EC_NO_ID, "bar")
+				), 0, 0
+		);
+	if (node == NULL) {
+		EC_LOG(EC_LOG_ERR, "cannot create node\n");
+		return -1;
+	}
+	testres |= EC_TEST_CHECK_PARSE(node, 0);
+	testres |= EC_TEST_CHECK_PARSE(node, 1, "foo");
+	testres |= EC_TEST_CHECK_PARSE(node, 1, "bar");
+	testres |= EC_TEST_CHECK_PARSE(node, 2, "foo", "bar");
+	testres |= EC_TEST_CHECK_PARSE(node, 3, "foo", "bar", "bar");
+	testres |= EC_TEST_CHECK_PARSE(node, 3, "bar", "foo", "bar");
+	testres |= EC_TEST_CHECK_PARSE(node, 2, "bar", "foo", "foo");
+	testres |= EC_TEST_CHECK_PARSE(node, 1, "foo", "foo");
+	testres |= EC_TEST_CHECK_PARSE(node, 0, "foox");
+
+	testres |= EC_TEST_CHECK_COMPLETE(node,
+		"", EC_NODE_ENDLIST,
+		"foo", "bar", EC_NODE_ENDLIST);
+	testres |= EC_TEST_CHECK_COMPLETE(node,
+		"f", EC_NODE_ENDLIST,
+		"foo", EC_NODE_ENDLIST);
+	testres |= EC_TEST_CHECK_COMPLETE(node,
+		"b", EC_NODE_ENDLIST,
+		"bar", EC_NODE_ENDLIST);
+	testres |= EC_TEST_CHECK_COMPLETE(node,
+		"foo", "", EC_NODE_ENDLIST,
+		"bar", EC_NODE_ENDLIST);
+	testres |= EC_TEST_CHECK_COMPLETE(node,
+		"bar", "", EC_NODE_ENDLIST,
+		"foo", "bar", EC_NODE_ENDLIST);
+	ec_node_free(node);
+
+	return testres;
+}
+/* LCOV_EXCL_STOP */
+
+static struct ec_test ec_node_once_test = {
+	.name = "node_once",
+	.test = ec_node_once_testcase,
+};
+
+EC_TEST_REGISTER(ec_node_once_test);