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-rw-r--r--src/plugins_exts.c680
1 files changed, 680 insertions, 0 deletions
diff --git a/src/plugins_exts.c b/src/plugins_exts.c
new file mode 100644
index 0000000..00970fa
--- /dev/null
+++ b/src/plugins_exts.c
@@ -0,0 +1,680 @@
+/**
+ * @file plugins_exts.c
+ * @author Radek Krejci <rkrejci@cesnet.cz>
+ * @author Michal Vasko <mvasko@cesnet.cz>
+ * @brief helper functions for extension plugins
+ *
+ * Copyright (c) 2019 - 2022 CESNET, z.s.p.o.
+ *
+ * This source code is licensed under BSD 3-Clause License (the "License").
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ */
+
+#include "plugins_exts.h"
+
+#include <assert.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "common.h"
+#include "dict.h"
+#include "parser_internal.h"
+#include "printer_internal.h"
+#include "schema_compile.h"
+#include "schema_compile_amend.h"
+#include "schema_compile_node.h"
+#include "schema_features.h"
+#include "tree_schema_internal.h"
+
+LIBYANG_API_DEF const struct lysp_module *
+lyplg_ext_parse_get_cur_pmod(const struct lysp_ctx *pctx)
+{
+ return PARSER_CUR_PMOD(pctx);
+}
+
+LIBYANG_API_DEF LY_ERR
+lyplg_ext_parse_extension_instance(struct lysp_ctx *pctx, struct lysp_ext_instance *ext)
+{
+ LY_ERR rc = LY_SUCCESS;
+ LY_ARRAY_COUNT_TYPE u;
+ struct lysp_stmt *stmt;
+
+ /* check for invalid substatements */
+ LY_LIST_FOR(ext->child, stmt) {
+ if (stmt->flags & (LYS_YIN_ATTR | LYS_YIN_ARGUMENT)) {
+ continue;
+ }
+ LY_ARRAY_FOR(ext->substmts, u) {
+ if (ext->substmts[u].stmt == stmt->kw) {
+ break;
+ }
+ }
+ if (u == LY_ARRAY_COUNT(ext->substmts)) {
+ LOGVAL(PARSER_CTX(pctx), LYVE_SYNTAX_YANG, "Invalid keyword \"%s\" as a child of \"%s%s%s\" extension instance.",
+ stmt->stmt, ext->name, ext->argument ? " " : "", ext->argument ? ext->argument : "");
+ rc = LY_EVALID;
+ goto cleanup;
+ }
+ }
+
+ /* parse all the known statements */
+ LY_ARRAY_FOR(ext->substmts, u) {
+ LY_LIST_FOR(ext->child, stmt) {
+ if (ext->substmts[u].stmt != stmt->kw) {
+ continue;
+ }
+
+ if ((rc = lys_parse_ext_instance_stmt(pctx, &ext->substmts[u], stmt))) {
+ goto cleanup;
+ }
+ }
+ }
+
+cleanup:
+ return rc;
+}
+
+/**
+ * @brief Compile an instance extension statement.
+ *
+ * @param[in] ctx Compile context.
+ * @param[in] parsed Parsed ext instance substatement structure.
+ * @param[in] ext Compiled ext instance.
+ * @param[in] substmt Compled ext instance substatement info.
+ * @return LY_ERR value.
+ */
+static LY_ERR
+lys_compile_ext_instance_stmt(struct lysc_ctx *ctx, const void *parsed, struct lysc_ext_instance *ext,
+ struct lysc_ext_substmt *substmt)
+{
+ LY_ERR rc = LY_SUCCESS;
+ ly_bool length_restr = 0;
+ LY_DATA_TYPE basetype;
+
+ /* compilation wthout any storage */
+ if (substmt->stmt == LY_STMT_IF_FEATURE) {
+ ly_bool enabled;
+
+ /* evaluate */
+ LY_CHECK_GOTO(rc = lys_eval_iffeatures(ctx->ctx, parsed, &enabled), cleanup);
+ if (!enabled) {
+ /* it is disabled, remove the whole extension instance */
+ rc = LY_ENOT;
+ }
+ }
+
+ if (!substmt->storage || !parsed) {
+ /* nothing to store or nothing parsed to compile */
+ goto cleanup;
+ }
+
+ switch (substmt->stmt) {
+ case LY_STMT_NOTIFICATION:
+ case LY_STMT_INPUT:
+ case LY_STMT_OUTPUT:
+ case LY_STMT_ACTION:
+ case LY_STMT_RPC:
+ case LY_STMT_ANYDATA:
+ case LY_STMT_ANYXML:
+ case LY_STMT_CASE:
+ case LY_STMT_CHOICE:
+ case LY_STMT_CONTAINER:
+ case LY_STMT_LEAF:
+ case LY_STMT_LEAF_LIST:
+ case LY_STMT_LIST:
+ case LY_STMT_USES: {
+ const uint16_t flags;
+ struct lysp_node *pnodes, *pnode;
+ struct lysc_node *node;
+
+ lyplg_ext_get_storage(ext, LY_STMT_STATUS, sizeof flags, (const void **)&flags);
+ pnodes = (struct lysp_node *)parsed;
+
+ /* compile nodes */
+ LY_LIST_FOR(pnodes, pnode) {
+ if (pnode->nodetype & (LYS_INPUT | LYS_OUTPUT)) {
+ /* manual compile */
+ node = calloc(1, sizeof(struct lysc_node_action_inout));
+ LY_CHECK_ERR_GOTO(!node, LOGMEM(ctx->ctx); rc = LY_EMEM, cleanup);
+ LY_CHECK_GOTO(rc = lys_compile_node_action_inout(ctx, pnode, node), cleanup);
+ LY_CHECK_GOTO(rc = lys_compile_node_connect(ctx, NULL, node), cleanup);
+ } else {
+ /* ctx->ext substatement storage is used as the document root */
+ LY_CHECK_GOTO(rc = lys_compile_node(ctx, pnode, NULL, flags, NULL), cleanup);
+ }
+ }
+ break;
+ }
+ case LY_STMT_ARGUMENT:
+ case LY_STMT_CONTACT:
+ case LY_STMT_DESCRIPTION:
+ case LY_STMT_ERROR_APP_TAG:
+ case LY_STMT_ERROR_MESSAGE:
+ case LY_STMT_KEY:
+ case LY_STMT_MODIFIER:
+ case LY_STMT_NAMESPACE:
+ case LY_STMT_ORGANIZATION:
+ case LY_STMT_PRESENCE:
+ case LY_STMT_REFERENCE:
+ case LY_STMT_UNITS:
+ /* just make a copy */
+ LY_CHECK_GOTO(rc = lydict_insert(ctx->ctx, parsed, 0, substmt->storage), cleanup);
+ break;
+
+ case LY_STMT_BIT:
+ basetype = LY_TYPE_BITS;
+ /* fallthrough */
+ case LY_STMT_ENUM:
+ if (substmt->stmt == LY_STMT_ENUM) {
+ basetype = LY_TYPE_ENUM;
+ }
+
+ /* compile */
+ LY_CHECK_GOTO(rc = lys_compile_type_enums(ctx, parsed, basetype, NULL, substmt->storage), cleanup);
+ break;
+
+ case LY_STMT_CONFIG: {
+ uint16_t flags;
+
+ if (!(ctx->compile_opts & LYS_COMPILE_NO_CONFIG)) {
+ memcpy(&flags, &parsed, 2);
+ if (flags & LYS_CONFIG_MASK) {
+ /* explicitly set */
+ flags |= LYS_SET_CONFIG;
+ } else if (ext->parent_stmt & LY_STMT_DATA_NODE_MASK) {
+ /* inherit */
+ flags = ((struct lysc_node *)ext->parent)->flags & LYS_CONFIG_MASK;
+ } else {
+ /* default config */
+ flags = LYS_CONFIG_W;
+ }
+ memcpy(substmt->storage, &flags, 2);
+ } /* else leave zero */
+ break;
+ }
+ case LY_STMT_MUST: {
+ const struct lysp_restr *restrs = parsed;
+
+ /* sized array */
+ COMPILE_ARRAY_GOTO(ctx, restrs, *(struct lysc_must **)substmt->storage, lys_compile_must, rc, cleanup);
+ break;
+ }
+ case LY_STMT_WHEN: {
+ const uint16_t flags;
+ const struct lysp_when *when = parsed;
+
+ /* read compiled status */
+ lyplg_ext_get_storage(ext, LY_STMT_STATUS, sizeof flags, (const void **)&flags);
+
+ /* compile */
+ LY_CHECK_GOTO(rc = lys_compile_when(ctx, when, flags, NULL, NULL, NULL, substmt->storage), cleanup);
+ break;
+ }
+ case LY_STMT_FRACTION_DIGITS:
+ case LY_STMT_REQUIRE_INSTANCE:
+ /* just make a copy */
+ memcpy(substmt->storage, &parsed, 1);
+ break;
+
+ case LY_STMT_MANDATORY:
+ case LY_STMT_ORDERED_BY:
+ case LY_STMT_STATUS:
+ /* just make a copy */
+ memcpy(substmt->storage, &parsed, 2);
+ break;
+
+ case LY_STMT_MAX_ELEMENTS:
+ case LY_STMT_MIN_ELEMENTS:
+ /* just make a copy */
+ memcpy(substmt->storage, &parsed, 4);
+ break;
+
+ case LY_STMT_POSITION:
+ case LY_STMT_VALUE:
+ /* just make a copy */
+ memcpy(substmt->storage, &parsed, 8);
+ break;
+
+ case LY_STMT_IDENTITY:
+ /* compile */
+ LY_CHECK_GOTO(rc = lys_identity_precompile(ctx, NULL, NULL, parsed, substmt->storage), cleanup);
+ break;
+
+ case LY_STMT_LENGTH:
+ length_restr = 1;
+ /* fallthrough */
+ case LY_STMT_RANGE:
+ /* compile, use uint64 default range */
+ LY_CHECK_GOTO(rc = lys_compile_type_range(ctx, parsed, LY_TYPE_UINT64, length_restr, 0, NULL, substmt->storage),
+ cleanup);
+ break;
+
+ case LY_STMT_PATTERN:
+ /* compile */
+ LY_CHECK_GOTO(rc = lys_compile_type_patterns(ctx, parsed, NULL, substmt->storage), cleanup);
+ break;
+
+ case LY_STMT_TYPE: {
+ const uint16_t flags;
+ const char *units;
+ const struct lysp_type *ptype = parsed;
+
+ /* read compiled info */
+ lyplg_ext_get_storage(ext, LY_STMT_STATUS, sizeof flags, (const void **)&flags);
+ lyplg_ext_get_storage(ext, LY_STMT_UNITS, sizeof units, (const void **)&units);
+
+ /* compile */
+ LY_CHECK_GOTO(rc = lys_compile_type(ctx, NULL, flags, ext->def->name, ptype, substmt->storage, &units, NULL), cleanup);
+ break;
+ }
+ case LY_STMT_EXTENSION_INSTANCE: {
+ struct lysp_ext_instance *extps = (struct lysp_ext_instance *)parsed;
+
+ /* compile sized array */
+ COMPILE_EXTS_GOTO(ctx, extps, *(struct lysc_ext_instance **)substmt->storage, ext, rc, cleanup);
+ break;
+ }
+ case LY_STMT_AUGMENT:
+ case LY_STMT_GROUPING:
+ case LY_STMT_BASE:
+ case LY_STMT_BELONGS_TO:
+ case LY_STMT_DEFAULT:
+ case LY_STMT_DEVIATE:
+ case LY_STMT_DEVIATION:
+ case LY_STMT_EXTENSION:
+ case LY_STMT_FEATURE:
+ case LY_STMT_IF_FEATURE:
+ case LY_STMT_IMPORT:
+ case LY_STMT_INCLUDE:
+ case LY_STMT_MODULE:
+ case LY_STMT_PATH:
+ case LY_STMT_PREFIX:
+ case LY_STMT_REFINE:
+ case LY_STMT_REVISION:
+ case LY_STMT_REVISION_DATE:
+ case LY_STMT_SUBMODULE:
+ case LY_STMT_TYPEDEF:
+ case LY_STMT_UNIQUE:
+ case LY_STMT_YANG_VERSION:
+ case LY_STMT_YIN_ELEMENT:
+ LOGVAL(ctx->ctx, LYVE_SYNTAX_YANG, "Statement \"%s\" compilation is not supported.", lyplg_ext_stmt2str(substmt->stmt));
+ rc = LY_EVALID;
+ goto cleanup;
+
+ default:
+ LOGVAL(ctx->ctx, LYVE_SYNTAX_YANG, "Statement \"%s\" is not supported as an extension "
+ "(found in \"%s%s%s\") substatement.", lyplg_ext_stmt2str(substmt->stmt), ext->def->name,
+ ext->argument ? " " : "", ext->argument ? ext->argument : "");
+ rc = LY_EVALID;
+ goto cleanup;
+ }
+
+cleanup:
+ return rc;
+}
+
+LIBYANG_API_DEF LY_ERR
+lyplg_ext_compile_extension_instance(struct lysc_ctx *ctx, const struct lysp_ext_instance *extp,
+ struct lysc_ext_instance *ext)
+{
+ LY_ERR rc = LY_SUCCESS;
+ LY_ARRAY_COUNT_TYPE u, v;
+ enum ly_stmt stmtp;
+ const void *storagep;
+ struct ly_set storagep_compiled = {0};
+
+ LY_CHECK_ARG_RET(ctx ? ctx->ctx : NULL, ctx, extp, ext, LY_EINVAL);
+
+ /* note into the compile context that we are processing extension now */
+ ctx->ext = ext;
+
+ LY_ARRAY_FOR(extp->substmts, u) {
+ stmtp = extp->substmts[u].stmt;
+ storagep = *(void **)extp->substmts[u].storage;
+
+ if (ly_set_contains(&storagep_compiled, storagep, NULL)) {
+ /* this parsed statement has already been compiled (for example, if it is a linked list of parsed nodes) */
+ continue;
+ }
+
+ LY_ARRAY_FOR(ext->substmts, v) {
+ if (stmtp != ext->substmts[v].stmt) {
+ continue;
+ }
+
+ if ((rc = lys_compile_ext_instance_stmt(ctx, storagep, ext, &ext->substmts[v]))) {
+ goto cleanup;
+ }
+
+ /* parsed substatement compiled */
+ break;
+ }
+
+ /* compiled */
+ ly_set_add(&storagep_compiled, storagep, 1, NULL);
+ }
+
+cleanup:
+ ctx->ext = NULL;
+ ly_set_erase(&storagep_compiled, NULL);
+ return rc;
+}
+
+LIBYANG_API_DEF struct ly_ctx *
+lyplg_ext_compile_get_ctx(const struct lysc_ctx *ctx)
+{
+ return ctx->ctx;
+}
+
+LIBYANG_API_DEF uint32_t *
+lyplg_ext_compile_get_options(const struct lysc_ctx *ctx)
+{
+ return &((struct lysc_ctx *)ctx)->compile_opts;
+}
+
+LIBYANG_API_DEF const struct lys_module *
+lyplg_ext_compile_get_cur_mod(const struct lysc_ctx *ctx)
+{
+ return ctx->cur_mod;
+}
+
+LIBYANG_API_DEF struct lysp_module *
+lyplg_ext_compile_get_pmod(const struct lysc_ctx *ctx)
+{
+ return ctx->pmod;
+}
+
+LIBYANG_API_DEF struct ly_out **
+lyplg_ext_print_get_out(const struct lyspr_ctx *ctx)
+{
+ return &((struct lyspr_ctx *)ctx)->out;
+}
+
+LIBYANG_API_DEF uint32_t *
+lyplg_ext_print_get_options(const struct lyspr_ctx *ctx)
+{
+ return &((struct lyspr_ctx *)ctx)->options;
+}
+
+LIBYANG_API_DEF uint16_t *
+lyplg_ext_print_get_level(const struct lyspr_ctx *ctx)
+{
+ return &((struct lyspr_ctx *)ctx)->level;
+}
+
+LIBYANG_API_DECL LY_ERR
+lyplg_ext_sprinter_ctree_add_ext_nodes(const struct lyspr_tree_ctx *ctx, struct lysc_ext_instance *ext,
+ lyplg_ext_sprinter_ctree_override_clb clb)
+{
+ LY_ERR rc = LY_SUCCESS;
+ uint32_t i;
+ struct lysc_node *schema;
+
+ LY_CHECK_ARG_RET2(NULL, ctx, ext, LY_EINVAL);
+
+ LY_ARRAY_FOR(ext->substmts, i) {
+ switch (ext->substmts[i].stmt) {
+ case LY_STMT_NOTIFICATION:
+ case LY_STMT_INPUT:
+ case LY_STMT_OUTPUT:
+ case LY_STMT_ACTION:
+ case LY_STMT_RPC:
+ case LY_STMT_ANYDATA:
+ case LY_STMT_ANYXML:
+ case LY_STMT_CASE:
+ case LY_STMT_CHOICE:
+ case LY_STMT_CONTAINER:
+ case LY_STMT_LEAF:
+ case LY_STMT_LEAF_LIST:
+ case LY_STMT_LIST:
+ schema = *((struct lysc_node **)ext->substmts[i].storage);
+ if (schema) {
+ rc = lyplg_ext_sprinter_ctree_add_nodes(ctx, schema, clb);
+ return rc;
+ }
+ default:
+ break;
+ }
+ }
+
+ return rc;
+}
+
+LIBYANG_API_DECL LY_ERR
+lyplg_ext_sprinter_ptree_add_ext_nodes(const struct lyspr_tree_ctx *ctx, struct lysp_ext_instance *ext,
+ lyplg_ext_sprinter_ptree_override_clb clb)
+{
+ LY_ERR rc = LY_SUCCESS;
+ uint32_t i;
+ struct lysp_node *schema;
+
+ LY_CHECK_ARG_RET2(NULL, ctx, ext, LY_EINVAL);
+
+ LY_ARRAY_FOR(ext->substmts, i) {
+ switch (ext->substmts[i].stmt) {
+ case LY_STMT_NOTIFICATION:
+ case LY_STMT_INPUT:
+ case LY_STMT_OUTPUT:
+ case LY_STMT_ACTION:
+ case LY_STMT_RPC:
+ case LY_STMT_ANYDATA:
+ case LY_STMT_ANYXML:
+ case LY_STMT_CASE:
+ case LY_STMT_CHOICE:
+ case LY_STMT_CONTAINER:
+ case LY_STMT_LEAF:
+ case LY_STMT_LEAF_LIST:
+ case LY_STMT_LIST:
+ schema = *((struct lysp_node **)ext->substmts[i].storage);
+ if (schema) {
+ rc = lyplg_ext_sprinter_ptree_add_nodes(ctx, schema, clb);
+ return rc;
+ }
+ default:
+ break;
+ }
+ }
+
+ return rc;
+}
+
+LIBYANG_API_DECL LY_ERR
+lyplg_ext_sprinter_ctree_add_nodes(const struct lyspr_tree_ctx *ctx, struct lysc_node *nodes,
+ lyplg_ext_sprinter_ctree_override_clb clb)
+{
+ struct lyspr_tree_schema *new;
+
+ LY_CHECK_ARG_RET1(NULL, ctx, LY_EINVAL);
+
+ if (!nodes) {
+ return LY_SUCCESS;
+ }
+
+ LY_ARRAY_NEW_RET(NULL, ((struct lyspr_tree_ctx *)ctx)->schemas, new, LY_EMEM);
+ new->compiled = 1;
+ new->ctree = nodes;
+ new->cn_overr = clb;
+
+ return LY_SUCCESS;
+}
+
+LIBYANG_API_DECL LY_ERR
+lyplg_ext_sprinter_ptree_add_nodes(const struct lyspr_tree_ctx *ctx, struct lysp_node *nodes,
+ lyplg_ext_sprinter_ptree_override_clb clb)
+{
+ struct lyspr_tree_schema *new;
+
+ LY_CHECK_ARG_RET1(NULL, ctx, LY_EINVAL);
+
+ if (!nodes) {
+ return LY_SUCCESS;
+ }
+
+ LY_ARRAY_NEW_RET(NULL, ((struct lyspr_tree_ctx *)ctx)->schemas, new, LY_EMEM);
+ new->compiled = 0;
+ new->ptree = nodes;
+ new->pn_overr = clb;
+
+ return LY_SUCCESS;
+}
+
+LIBYANG_API_DECL LY_ERR
+lyplg_ext_sprinter_tree_set_priv(const struct lyspr_tree_ctx *ctx, void *plugin_priv, void (*free_clb)(void *plugin_priv))
+{
+ LY_CHECK_ARG_RET1(NULL, ctx, LY_EINVAL);
+
+ ((struct lyspr_tree_ctx *)ctx)->plugin_priv = plugin_priv;
+ ((struct lyspr_tree_ctx *)ctx)->free_plugin_priv = free_clb;
+
+ return LY_SUCCESS;
+}
+
+LIBYANG_API_DEF const char *
+lyplg_ext_stmt2str(enum ly_stmt stmt)
+{
+ if (stmt == LY_STMT_EXTENSION_INSTANCE) {
+ return "extension instance";
+ } else {
+ return lys_stmt_str(stmt);
+ }
+}
+
+LIBYANG_API_DEF enum ly_stmt
+lyplg_ext_nodetype2stmt(uint16_t nodetype)
+{
+ switch (nodetype) {
+ case LYS_CONTAINER:
+ return LY_STMT_CONTAINER;
+ case LYS_CHOICE:
+ return LY_STMT_CHOICE;
+ case LYS_LEAF:
+ return LY_STMT_LEAF;
+ case LYS_LEAFLIST:
+ return LY_STMT_LEAF_LIST;
+ case LYS_LIST:
+ return LY_STMT_LIST;
+ case LYS_ANYXML:
+ return LY_STMT_ANYXML;
+ case LYS_ANYDATA:
+ return LY_STMT_ANYDATA;
+ case LYS_CASE:
+ return LY_STMT_CASE;
+ case LYS_RPC:
+ return LY_STMT_RPC;
+ case LYS_ACTION:
+ return LY_STMT_ACTION;
+ case LYS_NOTIF:
+ return LY_STMT_NOTIFICATION;
+ case LYS_USES:
+ return LY_STMT_USES;
+ case LYS_INPUT:
+ return LY_STMT_INPUT;
+ case LYS_OUTPUT:
+ return LY_STMT_OUTPUT;
+ default:
+ return LY_STMT_NONE;
+ }
+}
+
+LY_ERR
+lyplg_ext_get_storage_p(const struct lysc_ext_instance *ext, int stmt, const void ***storage_p)
+{
+ LY_ARRAY_COUNT_TYPE u;
+ enum ly_stmt match = 0;
+
+ *storage_p = NULL;
+
+ if (!(stmt & LY_STMT_NODE_MASK)) {
+ /* matching a non-node statement */
+ match = stmt;
+ }
+
+ LY_ARRAY_FOR(ext->substmts, u) {
+ if ((match && (ext->substmts[u].stmt == match)) || (!match && (ext->substmts[u].stmt & stmt))) {
+ *storage_p = ext->substmts[u].storage;
+ return LY_SUCCESS;
+ }
+ }
+
+ return LY_ENOT;
+}
+
+LIBYANG_API_DEF LY_ERR
+lyplg_ext_get_storage(const struct lysc_ext_instance *ext, int stmt, uint32_t storage_size, const void **storage)
+{
+ LY_ERR rc = LY_SUCCESS;
+ const void **s;
+
+ /* get pointer to the storage, is set even on error */
+ rc = lyplg_ext_get_storage_p(ext, stmt, &s);
+
+ /* assign */
+ if (s) {
+ memcpy(storage, s, storage_size);
+ } else {
+ memset(storage, 0, storage_size);
+ }
+
+ return rc;
+}
+
+LIBYANG_API_DEF LY_ERR
+lyplg_ext_parsed_get_storage(const struct lysc_ext_instance *ext, int stmt, uint32_t storage_size, const void **storage)
+{
+ LY_ARRAY_COUNT_TYPE u;
+ const struct lysp_ext_instance *extp = NULL;
+ enum ly_stmt match = 0;
+ const void **s = NULL;
+
+ /* find the parsed ext instance */
+ LY_ARRAY_FOR(ext->module->parsed->exts, u) {
+ extp = &ext->module->parsed->exts[u];
+
+ if (ext->def == extp->def->compiled) {
+ break;
+ }
+ extp = NULL;
+ }
+ assert(extp);
+
+ if (!(stmt & LY_STMT_NODE_MASK)) {
+ /* matching a non-node statement */
+ match = stmt;
+ }
+
+ /* get the substatement */
+ LY_ARRAY_FOR(extp->substmts, u) {
+ if ((match && (extp->substmts[u].stmt == match)) || (!match && (extp->substmts[u].stmt & stmt))) {
+ s = extp->substmts[u].storage;
+ break;
+ }
+ }
+
+ /* assign */
+ if (s) {
+ memcpy(storage, s, storage_size);
+ } else {
+ memset(storage, 0, storage_size);
+ }
+
+ return LY_SUCCESS;
+}
+
+LIBYANG_API_DEF LY_ERR
+lyplg_ext_get_data(const struct ly_ctx *ctx, const struct lysc_ext_instance *ext, void **ext_data, ly_bool *ext_data_free)
+{
+ LY_ERR rc;
+
+ if (!ctx->ext_clb) {
+ lyplg_ext_compile_log(NULL, ext, LY_LLERR, LY_EINVAL, "Failed to get extension data, no callback set.");
+ return LY_EINVAL;
+ }
+
+ if ((rc = ctx->ext_clb(ext, ctx->ext_clb_data, ext_data, ext_data_free))) {
+ lyplg_ext_compile_log(NULL, ext, LY_LLERR, rc, "Callback for getting ext data failed.");
+ }
+ return rc;
+}