| /** |
| * @file printer_json.c |
| * @author Radek Krejci <rkrejci@cesnet.cz> |
| * @brief JSON printer for libyang data structure |
| * |
| * 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 |
| */ |
| |
| #include <assert.h> |
| #include <stdint.h> |
| #include <stdlib.h> |
| |
| #include "common.h" |
| #include "context.h" |
| #include "log.h" |
| #include "out.h" |
| #include "out_internal.h" |
| #include "parser_data.h" |
| #include "plugins_types.h" |
| #include "printer_data.h" |
| #include "printer_internal.h" |
| #include "set.h" |
| #include "tree.h" |
| #include "tree_data.h" |
| #include "tree_schema.h" |
| |
| /** |
| * @brief JSON printer context. |
| */ |
| struct jsonpr_ctx { |
| struct ly_out *out; /**< output specification */ |
| const struct lyd_node *root; /**< root node of the subtree being printed */ |
| const struct lyd_node *parent; /**< parent of the node being printed */ |
| uint16_t level; /**< current indentation level: 0 - no formatting, >= 1 indentation levels */ |
| uint32_t options; /**< [Data printer flags](@ref dataprinterflags) */ |
| const struct ly_ctx *ctx; /**< libyang context */ |
| |
| uint16_t level_printed; /* level where some data were already printed */ |
| struct ly_set open; /* currently open array(s) */ |
| const struct lyd_node *print_sibling_metadata; |
| }; |
| |
| /** |
| * @brief Mark that something was already written in the current level, |
| * used to decide if a comma is expected between the items |
| */ |
| #define LEVEL_PRINTED pctx->level_printed = pctx->level |
| |
| #define PRINT_COMMA \ |
| if (pctx->level_printed >= pctx->level) { \ |
| ly_print_(pctx->out, ",%s", (DO_FORMAT ? "\n" : "")); \ |
| } |
| |
| static LY_ERR json_print_node(struct jsonpr_ctx *pctx, const struct lyd_node *node); |
| |
| /** |
| * @brief Compare 2 nodes, despite it is regular data node or an opaq node, and |
| * decide if they corresponds to the same schema node. |
| * |
| * @return 1 - matching nodes, 0 - non-matching nodes |
| */ |
| static int |
| matching_node(const struct lyd_node *node1, const struct lyd_node *node2) |
| { |
| assert(node1 || node2); |
| |
| if (!node1 || !node2) { |
| return 0; |
| } else if (node1->schema != node2->schema) { |
| return 0; |
| } |
| if (!node1->schema) { |
| /* compare node names */ |
| struct lyd_node_opaq *onode1 = (struct lyd_node_opaq *)node1; |
| struct lyd_node_opaq *onode2 = (struct lyd_node_opaq *)node2; |
| if ((onode1->name.name != onode2->name.name) || (onode1->name.prefix != onode2->name.prefix)) { |
| return 0; |
| } |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * @brief Open the JSON array ('[') for the specified @p node |
| * |
| * @param[in] ctx JSON printer context. |
| * @param[in] node First node of the array. |
| * @return LY_ERR value. |
| */ |
| static LY_ERR |
| json_print_array_open(struct jsonpr_ctx *pctx, const struct lyd_node *node) |
| { |
| ly_print_(pctx->out, "[%s", DO_FORMAT ? "\n" : ""); |
| LY_CHECK_RET(ly_set_add(&pctx->open, (void *)node, 0, NULL)); |
| LEVEL_INC; |
| |
| return LY_SUCCESS; |
| } |
| |
| /** |
| * @brief Get know if the array for the provided @p node is currently open. |
| * |
| * @param[in] ctx JSON printer context. |
| * @param[in] node Data node to check. |
| * @return 1 in case the printer is currently in the array belonging to the provided @p node. |
| * @return 0 in case the provided @p node is not connected with the currently open array (or there is no open array). |
| */ |
| static int |
| is_open_array(struct jsonpr_ctx *pctx, const struct lyd_node *node) |
| { |
| if (pctx->open.count && matching_node(node, pctx->open.dnodes[pctx->open.count - 1])) { |
| return 1; |
| } else { |
| return 0; |
| } |
| } |
| |
| /** |
| * @brief Close the most inner JSON array. |
| * |
| * @param[in] ctx JSON printer context. |
| */ |
| static void |
| json_print_array_close(struct jsonpr_ctx *pctx) |
| { |
| LEVEL_DEC; |
| ly_set_rm_index(&pctx->open, pctx->open.count - 1, NULL); |
| ly_print_(pctx->out, "%s%*s]", DO_FORMAT ? "\n" : "", INDENT); |
| } |
| |
| /** |
| * @brief Get the node's module name to use as the @p node prefix in JSON. |
| * |
| * @param[in] node Node to process. |
| * @return The name of the module where the @p node belongs, it can be NULL in case the module name |
| * cannot be determined (source format is XML and the refered namespace is unknown/not implemented in the current context). |
| */ |
| static const char * |
| node_prefix(const struct lyd_node *node) |
| { |
| if (node->schema) { |
| return node->schema->module->name; |
| } else { |
| struct lyd_node_opaq *onode = (struct lyd_node_opaq *)node; |
| const struct lys_module *mod; |
| |
| switch (onode->format) { |
| case LY_VALUE_JSON: |
| return onode->name.module_name; |
| case LY_VALUE_XML: |
| mod = ly_ctx_get_module_implemented_ns(onode->ctx, onode->name.module_ns); |
| if (!mod) { |
| return NULL; |
| } |
| return mod->name; |
| default: |
| /* cannot be created */ |
| LOGINT(LYD_CTX(node)); |
| } |
| } |
| |
| return NULL; |
| } |
| |
| /** |
| * @brief Compare 2 nodes if the belongs to the same module (if they come from the same namespace) |
| * |
| * Accepts both regulard a well as opaq nodes. |
| * |
| * @param[in] node1 The first node to compare. |
| * @param[in] node2 The second node to compare. |
| * @return 0 in case the nodes' modules are the same |
| * @return 1 in case the nodes belongs to different modules |
| */ |
| int |
| json_nscmp(const struct lyd_node *node1, const struct lyd_node *node2) |
| { |
| assert(node1 || node2); |
| |
| if (!node1 || !node2) { |
| return 1; |
| } else if (node1->schema && node2->schema) { |
| if (node1->schema->module == node2->schema->module) { |
| /* belongs to the same module */ |
| return 0; |
| } else { |
| /* different modules */ |
| return 1; |
| } |
| } else { |
| const char *pref1 = node_prefix(node1); |
| const char *pref2 = node_prefix(node2); |
| if ((pref1 && pref2) && (pref1 == pref2)) { |
| return 0; |
| } else { |
| return 1; |
| } |
| } |
| } |
| |
| /** |
| * @brief Print the @p text as JSON string - encode special characters and add quotation around the string. |
| * |
| * @param[in] out The output handler. |
| * @param[in] text The string to print. |
| * @return LY_ERR value. |
| */ |
| static LY_ERR |
| json_print_string(struct ly_out *out, const char *text) |
| { |
| uint64_t i, n; |
| |
| if (!text) { |
| return LY_SUCCESS; |
| } |
| |
| ly_write_(out, "\"", 1); |
| for (i = n = 0; text[i]; i++) { |
| const unsigned char ascii = text[i]; |
| if (ascii < 0x20) { |
| /* control character */ |
| ly_print_(out, "\\u%.4X", ascii); |
| } else { |
| switch (ascii) { |
| case '"': |
| ly_print_(out, "\\\""); |
| break; |
| case '\\': |
| ly_print_(out, "\\\\"); |
| break; |
| default: |
| ly_write_(out, &text[i], 1); |
| n++; |
| } |
| } |
| } |
| ly_write_(out, "\"", 1); |
| |
| return LY_SUCCESS; |
| } |
| |
| /** |
| * @brief Print JSON object's member name, ending by ':'. It resolves if the prefix is supposed to be printed. |
| * |
| * @param[in] ctx JSON printer context. |
| * @param[in] node The data node being printed. |
| * @param[in] is_attr Flag if the metadata sign (@) is supposed to be added before the identifier. |
| * @return LY_ERR value. |
| */ |
| static LY_ERR |
| json_print_member(struct jsonpr_ctx *pctx, const struct lyd_node *node, ly_bool is_attr) |
| { |
| PRINT_COMMA; |
| if ((LEVEL == 1) || json_nscmp(node, pctx->parent)) { |
| /* print "namespace" */ |
| ly_print_(pctx->out, "%*s\"%s%s:%s\":%s", INDENT, is_attr ? "@" : "", |
| node_prefix(node), node->schema->name, DO_FORMAT ? " " : ""); |
| } else { |
| ly_print_(pctx->out, "%*s\"%s%s\":%s", INDENT, is_attr ? "@" : "", node->schema->name, DO_FORMAT ? " " : ""); |
| } |
| |
| return LY_SUCCESS; |
| } |
| |
| /** |
| * @brief More generic alternative to json_print_member() to print some special cases of the member names. |
| * |
| * @param[in] ctx JSON printer context. |
| * @param[in] parent Parent node to compare modules deciding if the prefix is printed. |
| * @param[in] format Format to decide how to process the @p prefix. |
| * @param[in] name Name structure to provide name and prefix to print. If NULL, only "" name is printed. |
| * @param[in] is_attr Flag if the metadata sign (@) is supposed to be added before the identifier. |
| * @return LY_ERR value. |
| */ |
| static LY_ERR |
| json_print_member2(struct jsonpr_ctx *pctx, const struct lyd_node *parent, LY_VALUE_FORMAT format, |
| const struct ly_opaq_name *name, ly_bool is_attr) |
| { |
| const char *module_name = NULL, *name_str; |
| |
| PRINT_COMMA; |
| |
| /* determine prefix string */ |
| if (name) { |
| const struct lys_module *mod; |
| |
| switch (format) { |
| case LY_VALUE_JSON: |
| module_name = name->module_name; |
| break; |
| case LY_VALUE_XML: |
| mod = ly_ctx_get_module_implemented_ns(pctx->ctx, name->module_ns); |
| if (mod) { |
| module_name = mod->name; |
| } |
| break; |
| default: |
| /* cannot be created */ |
| LOGINT_RET(pctx->ctx); |
| } |
| |
| name_str = name->name; |
| } else { |
| name_str = ""; |
| } |
| |
| /* print the member */ |
| if (module_name && (!parent || (node_prefix(parent) != module_name))) { |
| ly_print_(pctx->out, "%*s\"%s%s:%s\":%s", INDENT, is_attr ? "@" : "", module_name, name_str, DO_FORMAT ? " " : ""); |
| } else { |
| ly_print_(pctx->out, "%*s\"%s%s\":%s", INDENT, is_attr ? "@" : "", name_str, DO_FORMAT ? " " : ""); |
| } |
| |
| return LY_SUCCESS; |
| } |
| |
| /** |
| * @brief Print data value. |
| * |
| * @param[in] pctx JSON printer context. |
| * @param[in] ctx Context used to print the value. |
| * @param[in] val Data value to be printed. |
| * @return LY_ERR value. |
| */ |
| static LY_ERR |
| json_print_value(struct jsonpr_ctx *pctx, const struct ly_ctx *ctx, const struct lyd_value *val) |
| { |
| ly_bool dynamic; |
| LY_DATA_TYPE basetype; |
| const char *value = val->realtype->plugin->print(ctx, val, LY_VALUE_JSON, NULL, &dynamic, NULL); |
| |
| basetype = val->realtype->basetype; |
| |
| print_val: |
| /* leafref is not supported */ |
| switch (basetype) { |
| case LY_TYPE_UNION: |
| /* use the resolved type */ |
| basetype = val->subvalue->value.realtype->basetype; |
| goto print_val; |
| |
| case LY_TYPE_BINARY: |
| case LY_TYPE_STRING: |
| case LY_TYPE_BITS: |
| case LY_TYPE_ENUM: |
| case LY_TYPE_INST: |
| case LY_TYPE_INT64: |
| case LY_TYPE_UINT64: |
| case LY_TYPE_DEC64: |
| case LY_TYPE_IDENT: |
| json_print_string(pctx->out, value); |
| break; |
| |
| case LY_TYPE_INT8: |
| case LY_TYPE_INT16: |
| case LY_TYPE_INT32: |
| case LY_TYPE_UINT8: |
| case LY_TYPE_UINT16: |
| case LY_TYPE_UINT32: |
| case LY_TYPE_BOOL: |
| ly_print_(pctx->out, "%s", value[0] ? value : "null"); |
| break; |
| |
| case LY_TYPE_EMPTY: |
| ly_print_(pctx->out, "[null]"); |
| break; |
| |
| default: |
| /* error */ |
| LOGINT_RET(pctx->ctx); |
| } |
| |
| if (dynamic) { |
| free((char *)value); |
| } |
| |
| return LY_SUCCESS; |
| } |
| |
| /** |
| * @brief Print all the attributes of the opaq node. |
| * |
| * @param[in] ctx JSON printer context. |
| * @param[in] node Opaq node where the attributes are placed. |
| * @param[in] wdmod With-defaults module to mark that default attribute is supposed to be printed. |
| * @return LY_ERR value. |
| */ |
| static LY_ERR |
| json_print_attribute(struct jsonpr_ctx *pctx, const struct lyd_node_opaq *node, const struct lys_module *wdmod) |
| { |
| struct lyd_attr *attr; |
| |
| if (wdmod) { |
| ly_print_(pctx->out, "%*s\"%s:default\":\"true\"", INDENT, wdmod->name); |
| LEVEL_PRINTED; |
| } |
| |
| for (attr = node->attr; attr; attr = attr->next) { |
| PRINT_COMMA; |
| json_print_member2(pctx, &node->node, attr->format, &attr->name, 0); |
| |
| if (attr->hints & (LYD_VALHINT_BOOLEAN | LYD_VALHINT_DECNUM)) { |
| ly_print_(pctx->out, "%s", attr->value[0] ? attr->value : "null"); |
| } else if (attr->hints & LYD_VALHINT_EMPTY) { |
| ly_print_(pctx->out, "[null]"); |
| } else { |
| json_print_string(pctx->out, attr->value); |
| } |
| LEVEL_PRINTED; |
| } |
| |
| return LY_SUCCESS; |
| } |
| |
| /** |
| * @brief Print all the metadata of the node. |
| * |
| * @param[in] ctx JSON printer context. |
| * @param[in] node Node where the metadata are placed. |
| * @param[in] wdmod With-defaults module to mark that default attribute is supposed to be printed. |
| * @return LY_ERR value. |
| */ |
| static LY_ERR |
| json_print_metadata(struct jsonpr_ctx *pctx, const struct lyd_node *node, const struct lys_module *wdmod) |
| { |
| struct lyd_meta *meta; |
| |
| if (wdmod) { |
| ly_print_(pctx->out, "%*s\"%s:default\":\"true\"", INDENT, wdmod->name); |
| LEVEL_PRINTED; |
| } |
| |
| for (meta = node->meta; meta; meta = meta->next) { |
| PRINT_COMMA; |
| ly_print_(pctx->out, "%*s\"%s:%s\":%s", INDENT, meta->annotation->module->name, meta->name, DO_FORMAT ? " " : ""); |
| LY_CHECK_RET(json_print_value(pctx, LYD_CTX(node), &meta->value)); |
| LEVEL_PRINTED; |
| } |
| |
| return LY_SUCCESS; |
| } |
| |
| /** |
| * @brief Print attributes/metadata of the given @p node. Accepts both regular as well as opaq nodes. |
| * |
| * @param[in] ctx JSON printer context. |
| * @param[in] node Data node where the attributes/metadata are placed. |
| * @param[in] inner Flag if the @p node is an inner node in the tree. |
| * @return LY_ERR value. |
| */ |
| static LY_ERR |
| json_print_attributes(struct jsonpr_ctx *pctx, const struct lyd_node *node, ly_bool inner) |
| { |
| const struct lys_module *wdmod = NULL; |
| |
| if ((node->flags & LYD_DEFAULT) && (pctx->options & (LYD_PRINT_WD_ALL_TAG | LYD_PRINT_WD_IMPL_TAG))) { |
| /* we have implicit OR explicit default node */ |
| /* get with-defaults module */ |
| wdmod = ly_ctx_get_module_implemented(LYD_CTX(node), "ietf-netconf-with-defaults"); |
| } |
| |
| if (node->schema && node->meta) { |
| if (inner) { |
| LY_CHECK_RET(json_print_member2(pctx, NULL, LY_VALUE_JSON, NULL, 1)); |
| } else { |
| LY_CHECK_RET(json_print_member(pctx, node, 1)); |
| } |
| ly_print_(pctx->out, "{%s", (DO_FORMAT ? "\n" : "")); |
| LEVEL_INC; |
| LY_CHECK_RET(json_print_metadata(pctx, node, wdmod)); |
| LEVEL_DEC; |
| ly_print_(pctx->out, "%s%*s}", DO_FORMAT ? "\n" : "", INDENT); |
| LEVEL_PRINTED; |
| } else if (!node->schema && ((struct lyd_node_opaq *)node)->attr) { |
| if (inner) { |
| LY_CHECK_RET(json_print_member2(pctx, NULL, LY_VALUE_JSON, NULL, 1)); |
| } else { |
| LY_CHECK_RET(json_print_member2(pctx, node, ((struct lyd_node_opaq *)node)->format, |
| &((struct lyd_node_opaq *)node)->name, 1)); |
| } |
| ly_print_(pctx->out, "{%s", (DO_FORMAT ? "\n" : "")); |
| LEVEL_INC; |
| LY_CHECK_RET(json_print_attribute(pctx, (struct lyd_node_opaq *)node, wdmod)); |
| LEVEL_DEC; |
| ly_print_(pctx->out, "%s%*s}", DO_FORMAT ? "\n" : "", INDENT); |
| LEVEL_PRINTED; |
| } |
| |
| return LY_SUCCESS; |
| } |
| |
| /** |
| * @brief Print leaf data node including its metadata. |
| * |
| * @param[in] ctx JSON printer context. |
| * @param[in] node Data node to print. |
| * @return LY_ERR value. |
| */ |
| static LY_ERR |
| json_print_leaf(struct jsonpr_ctx *pctx, const struct lyd_node *node) |
| { |
| LY_CHECK_RET(json_print_member(pctx, node, 0)); |
| LY_CHECK_RET(json_print_value(pctx, LYD_CTX(node), &((const struct lyd_node_term *)node)->value)); |
| LEVEL_PRINTED; |
| |
| /* print attributes as sibling */ |
| json_print_attributes(pctx, node, 0); |
| |
| return LY_SUCCESS; |
| } |
| |
| /** |
| * @brief Print anydata/anyxml content. |
| * |
| * @param[in] ctx JSON printer context. |
| * @param[in] any Anydata node to print. |
| * @return LY_ERR value. |
| */ |
| static LY_ERR |
| json_print_any_content(struct jsonpr_ctx *pctx, struct lyd_node_any *any) |
| { |
| LY_ERR ret = LY_SUCCESS; |
| struct lyd_node *iter; |
| const struct lyd_node *prev_parent; |
| uint32_t prev_opts, prev_lo; |
| |
| assert(any->schema->nodetype & LYD_NODE_ANY); |
| |
| if (any->value_type == LYD_ANYDATA_LYB) { |
| uint32_t parser_options = LYD_PARSE_ONLY | LYD_PARSE_OPAQ | LYD_PARSE_STRICT; |
| |
| /* turn logging off */ |
| prev_lo = ly_log_options(0); |
| |
| /* try to parse it into a data tree */ |
| if (lyd_parse_data_mem(pctx->ctx, any->value.mem, LYD_LYB, parser_options, 0, &iter) == LY_SUCCESS) { |
| /* successfully parsed */ |
| free(any->value.mem); |
| any->value.tree = iter; |
| any->value_type = LYD_ANYDATA_DATATREE; |
| } |
| |
| /* turn loggin on again */ |
| ly_log_options(prev_lo); |
| } |
| |
| switch (any->value_type) { |
| case LYD_ANYDATA_DATATREE: |
| /* print as an object */ |
| ly_print_(pctx->out, "{%s", DO_FORMAT ? "\n" : ""); |
| LEVEL_INC; |
| |
| /* close opening tag and print data */ |
| prev_parent = pctx->parent; |
| prev_opts = pctx->options; |
| pctx->parent = &any->node; |
| pctx->options &= ~LYD_PRINT_WITHSIBLINGS; |
| LY_LIST_FOR(any->value.tree, iter) { |
| ret = json_print_node(pctx, iter); |
| LY_CHECK_ERR_RET(ret, LEVEL_DEC, ret); |
| } |
| pctx->parent = prev_parent; |
| pctx->options = prev_opts; |
| |
| /* terminate the object */ |
| LEVEL_DEC; |
| if (DO_FORMAT) { |
| ly_print_(pctx->out, "\n%*s}", INDENT); |
| } else { |
| ly_print_(pctx->out, "}"); |
| } |
| break; |
| case LYD_ANYDATA_JSON: |
| if (!any->value.json) { |
| /* no content */ |
| if (any->schema->nodetype == LYS_ANYXML) { |
| ly_print_(pctx->out, "null"); |
| } else { |
| ly_print_(pctx->out, "{}"); |
| } |
| } else { |
| /* print without escaping special characters */ |
| ly_print_(pctx->out, "%s", any->value.json); |
| } |
| break; |
| case LYD_ANYDATA_STRING: |
| case LYD_ANYDATA_XML: |
| if (!any->value.str) { |
| /* no content */ |
| if (any->schema->nodetype == LYS_ANYXML) { |
| ly_print_(pctx->out, "null"); |
| } else { |
| ly_print_(pctx->out, "{}"); |
| } |
| } else { |
| /* print as a string */ |
| ly_print_(pctx->out, "\"%s\"", any->value.str); |
| } |
| break; |
| case LYD_ANYDATA_LYB: |
| /* LYB format is not supported */ |
| LOGWRN(pctx->ctx, "Unable to print anydata content (type %d) as JSON.", any->value_type); |
| break; |
| } |
| |
| return LY_SUCCESS; |
| } |
| |
| /** |
| * @brief Print content of a single container/list data node including its metadata. |
| * The envelope specific to nodes are expected to be printed by the caller. |
| * |
| * @param[in] ctx JSON printer context. |
| * @param[in] node Data node to print. |
| * @return LY_ERR value. |
| */ |
| static LY_ERR |
| json_print_inner(struct jsonpr_ctx *pctx, const struct lyd_node *node) |
| { |
| struct lyd_node *child; |
| const struct lyd_node *prev_parent; |
| struct lyd_node_opaq *opaq = NULL; |
| ly_bool has_content = 0; |
| |
| LY_LIST_FOR(lyd_child(node), child) { |
| if (lyd_node_should_print(child, pctx->options)) { |
| break; |
| } |
| } |
| if (node->meta || child) { |
| has_content = 1; |
| } |
| if (!node->schema) { |
| opaq = (struct lyd_node_opaq *)node; |
| } |
| |
| if ((node->schema && (node->schema->nodetype == LYS_LIST)) || |
| (opaq && (opaq->hints != LYD_HINT_DATA) && (opaq->hints & LYD_NODEHINT_LIST))) { |
| ly_print_(pctx->out, "%s%*s{%s", (is_open_array(pctx, node) && (pctx->level_printed >= pctx->level)) ? |
| (DO_FORMAT ? ",\n" : ",") : "", INDENT, (DO_FORMAT && has_content) ? "\n" : ""); |
| } else { |
| ly_print_(pctx->out, "%s{%s", (is_open_array(pctx, node) && (pctx->level_printed >= pctx->level)) ? "," : "", |
| (DO_FORMAT && has_content) ? "\n" : ""); |
| } |
| LEVEL_INC; |
| |
| json_print_attributes(pctx, node, 1); |
| |
| /* print children */ |
| prev_parent = pctx->parent; |
| pctx->parent = node; |
| LY_LIST_FOR(lyd_child(node), child) { |
| LY_CHECK_RET(json_print_node(pctx, child)); |
| } |
| pctx->parent = prev_parent; |
| |
| LEVEL_DEC; |
| if (DO_FORMAT && has_content) { |
| ly_print_(pctx->out, "\n%*s}", INDENT); |
| } else { |
| ly_print_(pctx->out, "}"); |
| } |
| LEVEL_PRINTED; |
| |
| return LY_SUCCESS; |
| } |
| |
| /** |
| * @brief Print container data node including its metadata. |
| * |
| * @param[in] ctx JSON printer context. |
| * @param[in] node Data node to print. |
| * @return LY_ERR value. |
| */ |
| static int |
| json_print_container(struct jsonpr_ctx *pctx, const struct lyd_node *node) |
| { |
| LY_CHECK_RET(json_print_member(pctx, node, 0)); |
| LY_CHECK_RET(json_print_inner(pctx, node)); |
| |
| return LY_SUCCESS; |
| } |
| |
| /** |
| * @brief Print anydata/anyxml data node including its metadata. |
| * |
| * @param[in] ctx JSON printer context. |
| * @param[in] node Data node to print. |
| * @return LY_ERR value. |
| */ |
| static int |
| json_print_any(struct jsonpr_ctx *pctx, const struct lyd_node *node) |
| { |
| LY_CHECK_RET(json_print_member(pctx, node, 0)); |
| LY_CHECK_RET(json_print_any_content(pctx, (struct lyd_node_any *)node)); |
| LEVEL_PRINTED; |
| |
| /* print attributes as sibling */ |
| json_print_attributes(pctx, node, 0); |
| |
| return LY_SUCCESS; |
| } |
| |
| /** |
| * @brief Check whether a node is the last printed instance of a (leaf-)list. |
| * |
| * @param[in] ctx JSON printer context. |
| * @param[in] node Last printed node. |
| * @return Whether it is the last printed instance or not. |
| */ |
| static ly_bool |
| json_print_array_is_last_inst(struct jsonpr_ctx *pctx, const struct lyd_node *node) |
| { |
| if (!is_open_array(pctx, node)) { |
| /* no array open */ |
| return 0; |
| } |
| |
| if ((pctx->root == node) && !(pctx->options & LYD_PRINT_WITHSIBLINGS)) { |
| /* the only printed instance */ |
| return 1; |
| } |
| |
| if (!node->next || (node->next->schema != node->schema)) { |
| /* last instance */ |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * @brief Print single leaf-list or list instance. |
| * |
| * In case of list, metadata are printed inside the list object. For the leaf-list, |
| * metadata are marked in the context for later printing after closing the array next to it using |
| * json_print_metadata_leaflist(). |
| * |
| * @param[in] ctx JSON printer context. |
| * @param[in] node Data node to print. |
| * @return LY_ERR value. |
| */ |
| static LY_ERR |
| json_print_leaf_list(struct jsonpr_ctx *pctx, const struct lyd_node *node) |
| { |
| if (!is_open_array(pctx, node)) { |
| LY_CHECK_RET(json_print_member(pctx, node, 0)); |
| LY_CHECK_RET(json_print_array_open(pctx, node)); |
| if (node->schema->nodetype == LYS_LEAFLIST) { |
| ly_print_(pctx->out, "%*s", INDENT); |
| } |
| } else if (node->schema->nodetype == LYS_LEAFLIST) { |
| ly_print_(pctx->out, ",%s%*s", DO_FORMAT ? "\n" : "", INDENT); |
| } |
| |
| if (node->schema->nodetype == LYS_LIST) { |
| if (!lyd_child(node)) { |
| /* empty, e.g. in case of filter */ |
| ly_print_(pctx->out, "%s%snull", (pctx->level_printed >= pctx->level) ? "," : "", DO_FORMAT ? " " : ""); |
| LEVEL_PRINTED; |
| } else { |
| /* print list's content */ |
| LY_CHECK_RET(json_print_inner(pctx, node)); |
| } |
| } else { |
| assert(node->schema->nodetype == LYS_LEAFLIST); |
| LY_CHECK_RET(json_print_value(pctx, LYD_CTX(node), &((const struct lyd_node_term *)node)->value)); |
| |
| if (node->meta && !pctx->print_sibling_metadata) { |
| pctx->print_sibling_metadata = node; |
| } |
| } |
| |
| if (json_print_array_is_last_inst(pctx, node)) { |
| json_print_array_close(pctx); |
| } |
| |
| return LY_SUCCESS; |
| } |
| |
| /** |
| * @brief Print leaf-list's metadata in case they were marked in the last call to json_print_leaf_list(). |
| * This function is supposed to be called when the leaf-list array is closed. |
| * |
| * @param[in] ctx JSON printer context. |
| * @return LY_ERR value. |
| */ |
| static LY_ERR |
| json_print_metadata_leaflist(struct jsonpr_ctx *pctx) |
| { |
| const struct lyd_node *prev, *node, *iter; |
| |
| if (!pctx->print_sibling_metadata) { |
| return LY_SUCCESS; |
| } |
| |
| for (node = pctx->print_sibling_metadata, prev = pctx->print_sibling_metadata->prev; |
| prev->next && matching_node(node, prev); |
| node = prev, prev = node->prev) {} |
| |
| /* node is the first instance of the leaf-list */ |
| |
| LY_CHECK_RET(json_print_member(pctx, node, 1)); |
| ly_print_(pctx->out, "[%s", (DO_FORMAT ? "\n" : "")); |
| LEVEL_INC; |
| LY_LIST_FOR(node, iter) { |
| PRINT_COMMA; |
| if (iter->meta) { |
| ly_print_(pctx->out, "%*s%s", INDENT, DO_FORMAT ? "{\n" : "{"); |
| LEVEL_INC; |
| LY_CHECK_RET(json_print_metadata(pctx, iter, NULL)); |
| LEVEL_DEC; |
| ly_print_(pctx->out, "%s%*s}", DO_FORMAT ? "\n" : "", INDENT); |
| } else { |
| ly_print_(pctx->out, "null"); |
| } |
| LEVEL_PRINTED; |
| if (!matching_node(iter, iter->next)) { |
| break; |
| } |
| } |
| LEVEL_DEC; |
| ly_print_(pctx->out, "%s%*s]", DO_FORMAT ? "\n" : "", INDENT); |
| LEVEL_PRINTED; |
| |
| return LY_SUCCESS; |
| } |
| |
| /** |
| * @brief Print opaq data node including its attributes. |
| * |
| * @param[in] ctx JSON printer context. |
| * @param[in] node Opaq node to print. |
| * @return LY_ERR value. |
| */ |
| static LY_ERR |
| json_print_opaq(struct jsonpr_ctx *pctx, const struct lyd_node_opaq *node) |
| { |
| ly_bool first = 1, last = 1; |
| |
| if (node->hints & (LYD_NODEHINT_LIST | LYD_NODEHINT_LEAFLIST)) { |
| if (node->prev->next && matching_node(node->prev, &node->node)) { |
| first = 0; |
| } |
| if (node->next && matching_node(&node->node, node->next)) { |
| last = 0; |
| } |
| } |
| |
| if (first) { |
| LY_CHECK_RET(json_print_member2(pctx, pctx->parent, node->format, &node->name, 0)); |
| |
| if (node->hints & (LYD_NODEHINT_LIST | LYD_NODEHINT_LEAFLIST)) { |
| LY_CHECK_RET(json_print_array_open(pctx, &node->node)); |
| } |
| if (node->hints & LYD_NODEHINT_LEAFLIST) { |
| ly_print_(pctx->out, "%*s", INDENT); |
| } |
| } else if (node->hints & LYD_NODEHINT_LEAFLIST) { |
| ly_print_(pctx->out, ",%s%*s", DO_FORMAT ? "\n" : "", INDENT); |
| } |
| if (node->child || (node->hints & LYD_NODEHINT_LIST)) { |
| LY_CHECK_RET(json_print_inner(pctx, &node->node)); |
| LEVEL_PRINTED; |
| } else { |
| if (node->hints & LYD_VALHINT_EMPTY) { |
| ly_print_(pctx->out, "[null]"); |
| } else if ((node->hints & (LYD_VALHINT_BOOLEAN | LYD_VALHINT_DECNUM)) && !(node->hints & LYD_VALHINT_NUM64)) { |
| ly_print_(pctx->out, "%s", node->value); |
| } else { |
| /* string or a large number */ |
| ly_print_(pctx->out, "\"%s\"", node->value); |
| } |
| LEVEL_PRINTED; |
| |
| /* attributes */ |
| json_print_attributes(pctx, (const struct lyd_node *)node, 0); |
| |
| } |
| if (last && (node->hints & (LYD_NODEHINT_LIST | LYD_NODEHINT_LEAFLIST))) { |
| json_print_array_close(pctx); |
| LEVEL_PRINTED; |
| } |
| |
| return LY_SUCCESS; |
| } |
| |
| /** |
| * @brief Print all the types of data node including its metadata. |
| * |
| * @param[in] ctx JSON printer context. |
| * @param[in] node Data node to print. |
| * @return LY_ERR value. |
| */ |
| static LY_ERR |
| json_print_node(struct jsonpr_ctx *pctx, const struct lyd_node *node) |
| { |
| if (!lyd_node_should_print(node, pctx->options)) { |
| if (json_print_array_is_last_inst(pctx, node)) { |
| json_print_array_close(pctx); |
| } |
| return LY_SUCCESS; |
| } |
| |
| if (!node->schema) { |
| LY_CHECK_RET(json_print_opaq(pctx, (const struct lyd_node_opaq *)node)); |
| } else { |
| switch (node->schema->nodetype) { |
| case LYS_RPC: |
| case LYS_ACTION: |
| case LYS_NOTIF: |
| case LYS_CONTAINER: |
| LY_CHECK_RET(json_print_container(pctx, node)); |
| break; |
| case LYS_LEAF: |
| LY_CHECK_RET(json_print_leaf(pctx, node)); |
| break; |
| case LYS_LEAFLIST: |
| case LYS_LIST: |
| LY_CHECK_RET(json_print_leaf_list(pctx, node)); |
| break; |
| case LYS_ANYDATA: |
| case LYS_ANYXML: |
| LY_CHECK_RET(json_print_any(pctx, node)); |
| break; |
| default: |
| LOGINT(pctx->ctx); |
| return EXIT_FAILURE; |
| } |
| } |
| |
| pctx->level_printed = pctx->level; |
| |
| if (pctx->print_sibling_metadata && !matching_node(node->next, pctx->print_sibling_metadata)) { |
| json_print_metadata_leaflist(pctx); |
| pctx->print_sibling_metadata = NULL; |
| } |
| |
| return LY_SUCCESS; |
| } |
| |
| LY_ERR |
| json_print_data(struct ly_out *out, const struct lyd_node *root, uint32_t options) |
| { |
| const struct lyd_node *node; |
| struct jsonpr_ctx pctx = {0}; |
| const char *delimiter = (options & LYD_PRINT_SHRINK) ? "" : "\n"; |
| |
| if (!root) { |
| ly_print_(out, "{}%s", delimiter); |
| ly_print_flush(out); |
| return LY_SUCCESS; |
| } |
| |
| pctx.out = out; |
| pctx.parent = NULL; |
| pctx.level = 1; |
| pctx.level_printed = 0; |
| pctx.options = options; |
| pctx.ctx = LYD_CTX(root); |
| |
| /* start */ |
| ly_print_(pctx.out, "{%s", delimiter); |
| |
| /* content */ |
| LY_LIST_FOR(root, node) { |
| pctx.root = node; |
| LY_CHECK_RET(json_print_node(&pctx, node)); |
| if (!(options & LYD_PRINT_WITHSIBLINGS)) { |
| break; |
| } |
| } |
| |
| /* end */ |
| ly_print_(out, "%s}%s", delimiter, delimiter); |
| |
| assert(!pctx.open.count); |
| ly_set_erase(&pctx.open, NULL); |
| |
| ly_print_flush(out); |
| return LY_SUCCESS; |
| } |