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-rw-r--r--src/schema_features.c714
1 files changed, 714 insertions, 0 deletions
diff --git a/src/schema_features.c b/src/schema_features.c
new file mode 100644
index 0000000..dca998e
--- /dev/null
+++ b/src/schema_features.c
@@ -0,0 +1,714 @@
+/**
+ * @file schema_features.c
+ * @author Radek Krejci <rkrejci@cesnet.cz>
+ * @brief Schema feature handling
+ *
+ * Copyright (c) 2015 - 2020 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
+ */
+
+#define _GNU_SOURCE
+
+#include "schema_features.h"
+
+#include <assert.h>
+#include <ctype.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "common.h"
+#include "log.h"
+#include "set.h"
+#include "tree.h"
+#include "tree_edit.h"
+#include "tree_schema.h"
+#include "tree_schema_internal.h"
+
+#define IFF_RECORDS_IN_BYTE 4
+#define IFF_RECORD_BITS 2
+#define IFF_RECORD_MASK 0x3
+
+uint8_t
+lysc_iff_getop(uint8_t *list, size_t pos)
+{
+ uint8_t *item;
+ uint8_t mask = IFF_RECORD_MASK, result;
+
+ item = &list[pos / IFF_RECORDS_IN_BYTE];
+ result = (*item) & (mask << IFF_RECORD_BITS * (pos % IFF_RECORDS_IN_BYTE));
+ return result >> IFF_RECORD_BITS * (pos % IFF_RECORDS_IN_BYTE);
+}
+
+static LY_ERR
+lysc_iffeature_value_(const struct lysc_iffeature *iff, size_t *index_e, size_t *index_f)
+{
+ uint8_t op;
+ LY_ERR a, b;
+
+ op = lysc_iff_getop(iff->expr, *index_e);
+ (*index_e)++;
+
+ switch (op) {
+ case LYS_IFF_F:
+ /* resolve feature */
+ return (iff->features[(*index_f)++]->flags & LYS_FENABLED) ? LY_SUCCESS : LY_ENOT;
+ case LYS_IFF_NOT:
+ /* invert result */
+ return lysc_iffeature_value_(iff, index_e, index_f) == LY_SUCCESS ? LY_ENOT : LY_SUCCESS;
+ case LYS_IFF_AND:
+ case LYS_IFF_OR:
+ a = lysc_iffeature_value_(iff, index_e, index_f);
+ b = lysc_iffeature_value_(iff, index_e, index_f);
+ if (op == LYS_IFF_AND) {
+ if ((a == LY_SUCCESS) && (b == LY_SUCCESS)) {
+ return LY_SUCCESS;
+ } else {
+ return LY_ENOT;
+ }
+ } else { /* LYS_IFF_OR */
+ if ((a == LY_SUCCESS) || (b == LY_SUCCESS)) {
+ return LY_SUCCESS;
+ } else {
+ return LY_ENOT;
+ }
+ }
+ }
+
+ return LY_ENOT;
+}
+
+LIBYANG_API_DEF LY_ERR
+lysc_iffeature_value(const struct lysc_iffeature *iff)
+{
+ size_t index_e = 0, index_f = 0;
+
+ LY_CHECK_ARG_RET(NULL, iff, LY_EINVAL);
+
+ if (iff->expr) {
+ return lysc_iffeature_value_(iff, &index_e, &index_f);
+ }
+ return LY_ENOT;
+}
+
+LIBYANG_API_DEF LY_ERR
+lys_identity_iffeature_value(const struct lysc_ident *ident)
+{
+ LY_ARRAY_COUNT_TYPE u, v;
+ ly_bool enabled;
+ const struct lysp_ident *idents_p, *found_ident = NULL;
+ struct lysp_include *includes;
+
+ assert(ident);
+
+ /* Search parsed identity in the module. */
+ idents_p = ident->module->parsed->identities;
+ LY_ARRAY_FOR(idents_p, u) {
+ if (idents_p[u].name == ident->name) {
+ found_ident = &idents_p[u];
+ break;
+ }
+ }
+
+ if (!found_ident) {
+ /* It is not in the module, so it must be in some submodule. */
+ includes = ident->module->parsed->includes;
+ LY_ARRAY_FOR(includes, u) {
+ idents_p = includes[u].submodule->identities;
+ LY_ARRAY_FOR(idents_p, v) {
+ if (idents_p[v].name == ident->name) {
+ found_ident = &idents_p[v];
+ break;
+ }
+ }
+ }
+ }
+
+ assert(found_ident);
+
+ /* Evaluate its if-feature. */
+ LY_CHECK_RET(lys_eval_iffeatures(ident->module->ctx, found_ident->iffeatures, &enabled));
+ if (!enabled) {
+ return LY_ENOT;
+ }
+
+ return LY_SUCCESS;
+}
+
+LIBYANG_API_DEF struct lysp_feature *
+lysp_feature_next(const struct lysp_feature *last, const struct lysp_module *pmod, uint32_t *idx)
+{
+ struct lysp_feature *features;
+
+ if (!*idx) {
+ /* module features */
+ features = pmod->features;
+ } else if ((*idx - 1) < LY_ARRAY_COUNT(pmod->includes)) {
+ /* submodule features */
+ features = pmod->includes[*idx - 1].submodule->features;
+ } else {
+ /* no more features */
+ return NULL;
+ }
+
+ /* get the next feature */
+ if (features && (!last || (&features[LY_ARRAY_COUNT(features) - 1] != last))) {
+ return !last ? &features[0] : (struct lysp_feature *)last + 1;
+ }
+
+ /* no more features in current (sub)module */
+ ++(*idx);
+ return lysp_feature_next(NULL, pmod, idx);
+}
+
+/**
+ * @brief Find a feature of the given name and referenced in the given module.
+ *
+ * @param[in] pmod Module where the feature was referenced (used to resolve prefix of the feature).
+ * @param[in] name Name of the feature including possible prefix.
+ * @param[in] len Length of the string representing the feature identifier in the name variable (mandatory!).
+ * @param[in] prefixed Whether the feature name can be prefixed.
+ * @return Pointer to the feature structure if found, NULL otherwise.
+ */
+static struct lysp_feature *
+lysp_feature_find(const struct lysp_module *pmod, const char *name, size_t len, ly_bool prefixed)
+{
+ const struct lys_module *mod;
+ const char *ptr;
+ struct lysp_feature *f = NULL;
+ uint32_t idx = 0;
+
+ assert(pmod);
+
+ if (prefixed && (ptr = ly_strnchr(name, ':', len))) {
+ /* we have a prefixed feature */
+ mod = ly_resolve_prefix(pmod->mod->ctx, name, ptr - name, LY_VALUE_SCHEMA, (void *)pmod);
+ LY_CHECK_RET(!mod, NULL);
+
+ pmod = mod->parsed;
+ len = len - (ptr - name) - 1;
+ name = ptr + 1;
+ }
+
+ /* feature without prefix, look in main module and all submodules */
+ if (pmod->is_submod) {
+ pmod = pmod->mod->parsed;
+ }
+
+ /* we have the correct module, get the feature */
+ while ((f = lysp_feature_next(f, pmod, &idx))) {
+ if (!ly_strncmp(f->name, name, len)) {
+ return f;
+ }
+ }
+
+ return NULL;
+}
+
+LIBYANG_API_DEF LY_ERR
+lys_feature_value(const struct lys_module *module, const char *feature)
+{
+ const struct lysp_feature *f;
+
+ LY_CHECK_ARG_RET(NULL, module, module->parsed, feature, LY_EINVAL);
+
+ /* search for the specified feature */
+ f = lysp_feature_find(module->parsed, feature, strlen(feature), 0);
+ LY_CHECK_RET(!f, LY_ENOTFOUND);
+
+ /* feature disabled */
+ if (!(f->flags & LYS_FENABLED)) {
+ return LY_ENOT;
+ }
+
+ /* feature enabled */
+ return LY_SUCCESS;
+}
+
+/**
+ * @brief Stack for processing if-feature expressions.
+ */
+struct iff_stack {
+ size_t size; /**< number of items in the stack */
+ size_t index; /**< first empty item */
+ uint8_t *stack; /**< stack - array of @ref ifftokens to create the if-feature expression in prefix format */
+};
+#define IFF_STACK_SIZE_STEP 4
+
+/**
+ * @brief Add @ref ifftokens into the stack.
+ * @param[in] stack The if-feature stack to use.
+ * @param[in] value One of the @ref ifftokens to store in the stack.
+ * @return LY_EMEM in case of memory allocation error
+ * @return LY_ESUCCESS if the value successfully stored.
+ */
+static LY_ERR
+iff_stack_push(struct iff_stack *stack, uint8_t value)
+{
+ if (stack->index == stack->size) {
+ stack->size += IFF_STACK_SIZE_STEP;
+ stack->stack = ly_realloc(stack->stack, stack->size * sizeof *stack->stack);
+ LY_CHECK_ERR_RET(!stack->stack, LOGMEM(NULL); stack->size = 0, LY_EMEM);
+ }
+ stack->stack[stack->index++] = value;
+ return LY_SUCCESS;
+}
+
+/**
+ * @brief Get (and remove) the last item form the stack.
+ * @param[in] stack The if-feature stack to use.
+ * @return The value from the top of the stack.
+ */
+static uint8_t
+iff_stack_pop(struct iff_stack *stack)
+{
+ assert(stack && stack->index);
+
+ stack->index--;
+ return stack->stack[stack->index];
+}
+
+/**
+ * @brief Clean up the stack.
+ * @param[in] stack The if-feature stack to use.
+ */
+static void
+iff_stack_clean(struct iff_stack *stack)
+{
+ stack->size = 0;
+ free(stack->stack);
+}
+
+/**
+ * @brief Store the @ref ifftokens (@p op) on the given position in the 2bits array
+ * (libyang format of the if-feature expression).
+ * @param[in,out] list The 2bits array to modify.
+ * @param[in] op The operand (@ref ifftokens) to store.
+ * @param[in] pos Position (0-based) where to store the given @p op.
+ */
+static void
+iff_setop(uint8_t *list, uint8_t op, size_t pos)
+{
+ uint8_t *item;
+ uint8_t mask = IFF_RECORD_MASK;
+
+ assert(op <= IFF_RECORD_MASK); /* max 2 bits */
+
+ item = &list[pos / IFF_RECORDS_IN_BYTE];
+ mask = mask << IFF_RECORD_BITS * (pos % IFF_RECORDS_IN_BYTE);
+ *item = (*item) & ~mask;
+ *item = (*item) | (op << IFF_RECORD_BITS * (pos % IFF_RECORDS_IN_BYTE));
+}
+
+#define LYS_IFF_LP 0x04 /**< Additional, temporary, value of @ref ifftokens: ( */
+#define LYS_IFF_RP 0x08 /**< Additional, temporary, value of @ref ifftokens: ) */
+
+static LY_ERR
+lys_compile_iffeature(const struct ly_ctx *ctx, const struct lysp_qname *qname, struct lysc_iffeature *iff)
+{
+ LY_ERR rc = LY_SUCCESS;
+ const char *c = qname->str;
+ int64_t i, j;
+ int8_t op_len, last_not = 0, checkversion = 0;
+ LY_ARRAY_COUNT_TYPE f_size = 0, expr_size = 0, f_exp = 1;
+ uint8_t op;
+ struct iff_stack stack = {0, 0, NULL};
+ struct lysp_feature *f;
+
+ assert(c);
+
+ /* pre-parse the expression to get sizes for arrays, also do some syntax checks of the expression */
+ for (i = j = 0; c[i]; i++) {
+ if (c[i] == '(') {
+ j++;
+ checkversion = 1;
+ continue;
+ } else if (c[i] == ')') {
+ j--;
+ continue;
+ } else if (isspace(c[i])) {
+ checkversion = 1;
+ continue;
+ }
+
+ if (!strncmp(&c[i], "not", op_len = ly_strlen_const("not")) ||
+ !strncmp(&c[i], "and", op_len = ly_strlen_const("and")) ||
+ !strncmp(&c[i], "or", op_len = ly_strlen_const("or"))) {
+ uint64_t spaces;
+
+ for (spaces = 0; c[i + op_len + spaces] && isspace(c[i + op_len + spaces]); spaces++) {}
+ if (c[i + op_len + spaces] == '\0') {
+ LOGVAL(ctx, LYVE_SYNTAX_YANG, "Invalid value \"%s\" of if-feature - unexpected end of expression.", qname->str);
+ return LY_EVALID;
+ } else if (!isspace(c[i + op_len])) {
+ /* feature name starting with the not/and/or */
+ last_not = 0;
+ f_size++;
+ } else if (c[i] == 'n') { /* not operation */
+ if (last_not) {
+ /* double not */
+ expr_size = expr_size - 2;
+ last_not = 0;
+ } else {
+ last_not = 1;
+ }
+ } else { /* and, or */
+ if (f_exp != f_size) {
+ LOGVAL(ctx, LYVE_SYNTAX_YANG,
+ "Invalid value \"%s\" of if-feature - missing feature/expression before \"%.*s\" operation.",
+ qname->str, op_len, &c[i]);
+ return LY_EVALID;
+ }
+ f_exp++;
+
+ /* not a not operation */
+ last_not = 0;
+ }
+ i += op_len;
+ } else {
+ f_size++;
+ last_not = 0;
+ }
+ expr_size++;
+
+ while (!isspace(c[i])) {
+ if (!c[i] || (c[i] == ')') || (c[i] == '(')) {
+ i--;
+ break;
+ }
+ i++;
+ }
+ }
+ if (j) {
+ /* not matching count of ( and ) */
+ LOGVAL(ctx, LYVE_SYNTAX_YANG, "Invalid value \"%s\" of if-feature - non-matching opening and closing parentheses.",
+ qname->str);
+ return LY_EVALID;
+ }
+ if (f_exp != f_size) {
+ /* features do not match the needed arguments for the logical operations */
+ LOGVAL(ctx, LYVE_SYNTAX_YANG, "Invalid value \"%s\" of if-feature - number of features in expression does not match "
+ "the required number of operands for the operations.", qname->str);
+ return LY_EVALID;
+ }
+
+ if (checkversion || (expr_size > 1)) {
+ /* check that we have 1.1 module */
+ if (qname->mod->version != LYS_VERSION_1_1) {
+ LOGVAL(ctx, LYVE_SYNTAX_YANG, "Invalid value \"%s\" of if-feature - YANG 1.1 expression in YANG 1.0 module.",
+ qname->str);
+ return LY_EVALID;
+ }
+ }
+
+ /* allocate the memory */
+ LY_ARRAY_CREATE_RET(ctx, iff->features, f_size, LY_EMEM);
+ iff->expr = calloc((j = (expr_size / IFF_RECORDS_IN_BYTE) + ((expr_size % IFF_RECORDS_IN_BYTE) ? 1 : 0)), sizeof *iff->expr);
+ stack.stack = malloc(expr_size * sizeof *stack.stack);
+ LY_CHECK_ERR_GOTO(!stack.stack || !iff->expr, LOGMEM(ctx); rc = LY_EMEM, error);
+
+ stack.size = expr_size;
+ f_size--; expr_size--; /* used as indexes from now */
+
+ for (i--; i >= 0; i--) {
+ if (c[i] == ')') {
+ /* push it on stack */
+ iff_stack_push(&stack, LYS_IFF_RP);
+ continue;
+ } else if (c[i] == '(') {
+ /* pop from the stack into result all operators until ) */
+ while ((op = iff_stack_pop(&stack)) != LYS_IFF_RP) {
+ iff_setop(iff->expr, op, expr_size--);
+ }
+ continue;
+ } else if (isspace(c[i])) {
+ continue;
+ }
+
+ /* end of operator or operand -> find beginning and get what is it */
+ j = i + 1;
+ while (i >= 0 && !isspace(c[i]) && c[i] != '(') {
+ i--;
+ }
+ i++; /* go back by one step */
+
+ if (!strncmp(&c[i], "not", ly_strlen_const("not")) && isspace(c[i + ly_strlen_const("not")])) {
+ if (stack.index && (stack.stack[stack.index - 1] == LYS_IFF_NOT)) {
+ /* double not */
+ iff_stack_pop(&stack);
+ } else {
+ /* not has the highest priority, so do not pop from the stack
+ * as in case of AND and OR */
+ iff_stack_push(&stack, LYS_IFF_NOT);
+ }
+ } else if (!strncmp(&c[i], "and", ly_strlen_const("and")) && isspace(c[i + ly_strlen_const("and")])) {
+ /* as for OR - pop from the stack all operators with the same or higher
+ * priority and store them to the result, then push the AND to the stack */
+ while (stack.index && stack.stack[stack.index - 1] <= LYS_IFF_AND) {
+ op = iff_stack_pop(&stack);
+ iff_setop(iff->expr, op, expr_size--);
+ }
+ iff_stack_push(&stack, LYS_IFF_AND);
+ } else if (!strncmp(&c[i], "or", 2) && isspace(c[i + 2])) {
+ while (stack.index && stack.stack[stack.index - 1] <= LYS_IFF_OR) {
+ op = iff_stack_pop(&stack);
+ iff_setop(iff->expr, op, expr_size--);
+ }
+ iff_stack_push(&stack, LYS_IFF_OR);
+ } else {
+ /* feature name, length is j - i */
+
+ /* add it to the expression */
+ iff_setop(iff->expr, LYS_IFF_F, expr_size--);
+
+ /* now get the link to the feature definition */
+ f = lysp_feature_find(qname->mod, &c[i], j - i, 1);
+ if (!f) {
+ LOGVAL(ctx, LYVE_SYNTAX_YANG, "Invalid value \"%s\" of if-feature - unable to find feature \"%.*s\".",
+ qname->str, (int)(j - i), &c[i]);
+ rc = LY_EVALID;
+ goto error;
+ }
+ iff->features[f_size] = f;
+ LY_ARRAY_INCREMENT(iff->features);
+ f_size--;
+ }
+ }
+ while (stack.index) {
+ op = iff_stack_pop(&stack);
+ iff_setop(iff->expr, op, expr_size--);
+ }
+
+ if (++expr_size || ++f_size) {
+ /* not all expected operators and operands found */
+ LOGVAL(ctx, LYVE_SYNTAX_YANG, "Invalid value \"%s\" of if-feature - processing error.", qname->str);
+ rc = LY_EINT;
+ } else {
+ rc = LY_SUCCESS;
+ }
+
+error:
+ /* cleanup */
+ iff_stack_clean(&stack);
+
+ return rc;
+}
+
+LY_ERR
+lys_eval_iffeatures(const struct ly_ctx *ctx, const struct lysp_qname *iffeatures, ly_bool *enabled)
+{
+ LY_ERR ret;
+ LY_ARRAY_COUNT_TYPE u;
+ struct lysc_iffeature iff;
+ struct lysf_ctx fctx = {.ctx = (struct ly_ctx *)ctx};
+
+ /* enabled by default */
+ *enabled = 1;
+
+ if (!iffeatures) {
+ return LY_SUCCESS;
+ }
+
+ /* evaluate all if-feature conditions or until an unsatisfied one is found */
+ LY_ARRAY_FOR(iffeatures, u) {
+ memset(&iff, 0, sizeof iff);
+ LY_CHECK_RET(lys_compile_iffeature(ctx, &iffeatures[u], &iff));
+
+ ret = lysc_iffeature_value(&iff);
+ lysc_iffeature_free(&fctx, &iff);
+ if (ret == LY_ENOT) {
+ *enabled = 0;
+ break;
+ } else if (ret) {
+ return ret;
+ }
+ }
+
+ return LY_SUCCESS;
+}
+
+LY_ERR
+lys_check_features(const struct lysp_module *pmod)
+{
+ LY_ERR r;
+ uint32_t i = 0;
+ struct lysp_feature *f = NULL;
+
+ while ((f = lysp_feature_next(f, pmod, &i))) {
+ if (!(f->flags & LYS_FENABLED) || !f->iffeatures) {
+ /* disabled feature or no if-features to check */
+ continue;
+ }
+
+ assert(f->iffeatures_c);
+ r = lysc_iffeature_value(f->iffeatures_c);
+ if (r == LY_ENOT) {
+ LOGERR(pmod->mod->ctx, LY_EDENIED, "Feature \"%s\" cannot be enabled because its \"if-feature\" is not satisfied.",
+ f->name);
+ return LY_EDENIED;
+ } else if (r) {
+ return r;
+ } /* else if-feature satisfied */
+ }
+
+ return LY_SUCCESS;
+}
+
+LY_ERR
+lys_set_features(struct lysp_module *pmod, const char **features)
+{
+ uint32_t i = 0, j;
+ struct lysp_feature *f = 0;
+ ly_bool change = 0;
+
+ if (!features) {
+ /* do not touch the features */
+
+ } else if (!features[0]) {
+ /* disable all the features */
+ while ((f = lysp_feature_next(f, pmod, &i))) {
+ if (f->flags & LYS_FENABLED) {
+ f->flags &= ~LYS_FENABLED;
+ change = 1;
+ }
+ }
+ } else if (!strcmp(features[0], "*")) {
+ /* enable all the features */
+ while ((f = lysp_feature_next(f, pmod, &i))) {
+ if (!(f->flags & LYS_FENABLED)) {
+ f->flags |= LYS_FENABLED;
+ change = 1;
+ }
+ }
+ } else {
+ /* check that all the features exist */
+ for (j = 0; features[j]; ++j) {
+ if (!lysp_feature_find(pmod, features[j], strlen(features[j]), 0)) {
+ LOGERR(pmod->mod->ctx, LY_EINVAL, "Feature \"%s\" not found in module \"%s\".", features[j], pmod->mod->name);
+ return LY_EINVAL;
+ }
+ }
+
+ /* enable specific features, disable the rest */
+ while ((f = lysp_feature_next(f, pmod, &i))) {
+ for (j = 0; features[j]; ++j) {
+ if (!strcmp(f->name, features[j])) {
+ break;
+ }
+ }
+
+ if (features[j] && !(f->flags & LYS_FENABLED)) {
+ /* enable */
+ f->flags |= LYS_FENABLED;
+ change = 1;
+ } else if (!features[j] && (f->flags & LYS_FENABLED)) {
+ /* disable */
+ f->flags &= ~LYS_FENABLED;
+ change = 1;
+ }
+ }
+ }
+
+ if (!change) {
+ /* features already set correctly */
+ return LY_EEXIST;
+ }
+
+ return LY_SUCCESS;
+}
+
+/**
+ * @brief Check circular dependency of features - feature MUST NOT reference itself (via their if-feature statement).
+ *
+ * The function works in the same way as lys_compile_identity_circular_check() with different structures and error messages.
+ *
+ * @param[in] ctx Compile context for logging.
+ * @param[in] feature The feature referenced in if-feature statement (its depfeatures list is being extended by the feature
+ * being currently processed).
+ * @param[in] depfeatures The list of depending features of the feature being currently processed (not the one provided as @p feature)
+ * @return LY_SUCCESS if everything is ok.
+ * @return LY_EVALID if the feature references indirectly itself.
+ */
+static LY_ERR
+lys_compile_feature_circular_check(const struct ly_ctx *ctx, struct lysp_feature *feature, struct lysp_feature **depfeatures)
+{
+ LY_ERR ret = LY_SUCCESS;
+ LY_ARRAY_COUNT_TYPE u, v;
+ struct ly_set recursion = {0};
+ struct lysp_feature *drv;
+
+ if (!depfeatures) {
+ return LY_SUCCESS;
+ }
+
+ for (u = 0; u < LY_ARRAY_COUNT(depfeatures); ++u) {
+ if (feature == depfeatures[u]) {
+ LOGVAL(ctx, LYVE_REFERENCE, "Feature \"%s\" is indirectly referenced from itself.", feature->name);
+ ret = LY_EVALID;
+ goto cleanup;
+ }
+ ret = ly_set_add(&recursion, depfeatures[u], 0, NULL);
+ LY_CHECK_GOTO(ret, cleanup);
+ }
+
+ for (v = 0; v < recursion.count; ++v) {
+ drv = recursion.objs[v];
+ for (u = 0; u < LY_ARRAY_COUNT(drv->depfeatures); ++u) {
+ if (feature == drv->depfeatures[u]) {
+ LOGVAL(ctx, LYVE_REFERENCE, "Feature \"%s\" is indirectly referenced from itself.", feature->name);
+ ret = LY_EVALID;
+ goto cleanup;
+ }
+ ly_set_add(&recursion, drv->depfeatures[u], 0, NULL);
+ LY_CHECK_GOTO(ret, cleanup);
+ }
+ }
+
+cleanup:
+ ly_set_erase(&recursion, NULL);
+ return ret;
+}
+
+LY_ERR
+lys_compile_feature_iffeatures(struct lysp_module *pmod)
+{
+ LY_ARRAY_COUNT_TYPE u, v;
+ struct lysp_feature *f = NULL, **df;
+ uint32_t idx = 0;
+
+ while ((f = lysp_feature_next(f, pmod, &idx))) {
+ if (!f->iffeatures) {
+ continue;
+ }
+
+ /* compile if-features */
+ LY_ARRAY_CREATE_RET(pmod->mod->ctx, f->iffeatures_c, LY_ARRAY_COUNT(f->iffeatures), LY_EMEM);
+ LY_ARRAY_FOR(f->iffeatures, u) {
+ LY_ARRAY_INCREMENT(f->iffeatures_c);
+ LY_CHECK_RET(lys_compile_iffeature(pmod->mod->ctx, &(f->iffeatures)[u], &(f->iffeatures_c)[u]));
+ }
+ LY_ARRAY_FOR(f->iffeatures_c, u) {
+ LY_ARRAY_FOR(f->iffeatures_c[u].features, v) {
+ /* check for circular dependency - direct reference first,... */
+ if (f == f->iffeatures_c[u].features[v]) {
+ LOGVAL(pmod->mod->ctx, LYVE_REFERENCE, "Feature \"%s\" is referenced from itself.", f->name);
+ return LY_EVALID;
+ }
+ /* ... and indirect circular reference */
+ LY_CHECK_RET(lys_compile_feature_circular_check(pmod->mod->ctx, f->iffeatures_c[u].features[v], f->depfeatures));
+
+ /* add itself into the dependants list */
+ LY_ARRAY_NEW_RET(pmod->mod->ctx, f->iffeatures_c[u].features[v]->depfeatures, df, LY_EMEM);
+ *df = f;
+ }
+ }
+ }
+
+ return LY_SUCCESS;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-11 18:56:33 +0000