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Diffstat (limited to '')
| -rw-r--r-- | src/yajlpp/yajlpp.cc | 1565 |
1 files changed, 1565 insertions, 0 deletions
diff --git a/src/yajlpp/yajlpp.cc b/src/yajlpp/yajlpp.cc new file mode 100644 index 0000000..010a7f9 --- /dev/null +++ b/src/yajlpp/yajlpp.cc @@ -0,0 +1,1565 @@ +/** + * Copyright (c) 2015, Timothy Stack + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * * Neither the name of Timothy Stack nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * @file yajlpp.cc + */ + +#include <regex> +#include <utility> + +#include "yajlpp.hh" + +#include "base/fs_util.hh" +#include "base/snippet_highlighters.hh" +#include "config.h" +#include "fmt/format.h" +#include "ghc/filesystem.hpp" +#include "yajl/api/yajl_parse.h" +#include "yajlpp_def.hh" + +const json_path_handler_base::enum_value_t + json_path_handler_base::ENUM_TERMINATOR((const char*) nullptr, 0); + +yajl_gen_status +yajl_gen_tree(yajl_gen hand, yajl_val val) +{ + switch (val->type) { + case yajl_t_string: { + return yajl_gen_string(hand, YAJL_GET_STRING(val)); + } + case yajl_t_number: { + if (YAJL_IS_INTEGER(val)) { + return yajl_gen_integer(hand, YAJL_GET_INTEGER(val)); + } + if (YAJL_IS_DOUBLE(val)) { + return yajl_gen_double(hand, YAJL_GET_DOUBLE(val)); + } + return yajl_gen_number( + hand, YAJL_GET_NUMBER(val), strlen(YAJL_GET_NUMBER(val))); + } + case yajl_t_object: { + auto rc = yajl_gen_map_open(hand); + if (rc != yajl_gen_status_ok) { + return rc; + } + for (size_t lpc = 0; lpc < YAJL_GET_OBJECT(val)->len; lpc++) { + rc = yajl_gen_string(hand, YAJL_GET_OBJECT(val)->keys[lpc]); + if (rc != yajl_gen_status_ok) { + return rc; + } + rc = yajl_gen_tree(hand, YAJL_GET_OBJECT(val)->values[lpc]); + if (rc != yajl_gen_status_ok) { + return rc; + } + } + rc = yajl_gen_map_close(hand); + if (rc != yajl_gen_status_ok) { + return rc; + } + return yajl_gen_status_ok; + } + case yajl_t_array: { + auto rc = yajl_gen_array_open(hand); + if (rc != yajl_gen_status_ok) { + return rc; + } + for (size_t lpc = 0; lpc < YAJL_GET_ARRAY(val)->len; lpc++) { + rc = yajl_gen_tree(hand, YAJL_GET_ARRAY(val)->values[lpc]); + if (rc != yajl_gen_status_ok) { + return rc; + } + } + rc = yajl_gen_array_close(hand); + if (rc != yajl_gen_status_ok) { + return rc; + } + return yajl_gen_status_ok; + } + case yajl_t_true: { + return yajl_gen_bool(hand, true); + } + case yajl_t_false: { + return yajl_gen_bool(hand, false); + } + case yajl_t_null: { + return yajl_gen_null(hand); + } + default: + return yajl_gen_status_ok; + } +} + +void +yajl_cleanup_tree(yajl_val val) +{ + if (YAJL_IS_OBJECT(val)) { + auto* val_as_obj = YAJL_GET_OBJECT(val); + + for (size_t lpc = 0; lpc < val_as_obj->len;) { + auto* child_val = val_as_obj->values[lpc]; + + yajl_cleanup_tree(child_val); + if (YAJL_IS_OBJECT(child_val) + && YAJL_GET_OBJECT(child_val)->len == 0) + { + free((char*) val_as_obj->keys[lpc]); + yajl_tree_free(val_as_obj->values[lpc]); + val_as_obj->len -= 1; + for (auto lpc2 = lpc; lpc2 < val_as_obj->len; lpc2++) { + val_as_obj->keys[lpc2] = val_as_obj->keys[lpc2 + 1]; + val_as_obj->values[lpc2] = val_as_obj->values[lpc2 + 1]; + } + } else { + lpc++; + } + } + } +} + +json_path_handler_base::json_path_handler_base(const std::string& property) + : jph_property(property.back() == '#' + ? property.substr(0, property.size() - 1) + : property), + jph_regex(lnav::pcre2pp::code::from(lnav::pcre2pp::quote(property), + PCRE2_ANCHORED) + .unwrap() + .to_shared()), + jph_is_array(property.back() == '#') +{ + memset(&this->jph_callbacks, 0, sizeof(this->jph_callbacks)); +} + +static std::string +scrub_pattern(const std::string& pattern) +{ + static const std::regex CAPTURE(R"(\(\?\<\w+\>)"); + + return std::regex_replace(pattern, CAPTURE, "("); +} + +json_path_handler_base::json_path_handler_base( + const std::shared_ptr<const lnav::pcre2pp::code>& property) + : jph_property(scrub_pattern(property->get_pattern())), jph_regex(property), + jph_is_array(property->get_pattern().find('#') != std::string::npos), + jph_is_pattern_property(property->get_capture_count() > 0) +{ + memset(&this->jph_callbacks, 0, sizeof(this->jph_callbacks)); +} + +json_path_handler_base::json_path_handler_base( + std::string property, + const std::shared_ptr<const lnav::pcre2pp::code>& property_re) + : jph_property(std::move(property)), jph_regex(property_re), + jph_is_array(property_re->get_pattern().find('#') != std::string::npos) +{ + memset(&this->jph_callbacks, 0, sizeof(this->jph_callbacks)); +} + +yajl_gen_status +json_path_handler_base::gen(yajlpp_gen_context& ygc, yajl_gen handle) const +{ + if (this->jph_is_array) { + auto size = this->jph_size_provider(ygc.ygc_obj_stack.top()); + auto md = lnav::pcre2pp::match_data::unitialized(); + + yajl_gen_string(handle, this->jph_property); + yajl_gen_array_open(handle); + for (size_t index = 0; index < size; index++) { + yajlpp_provider_context ypc{&md, index}; + yajlpp_gen_context elem_ygc(handle, *this->jph_children); + elem_ygc.ygc_depth = 1; + elem_ygc.ygc_obj_stack.push( + this->jph_obj_provider(ypc, ygc.ygc_obj_stack.top())); + + elem_ygc.gen(); + } + yajl_gen_array_close(handle); + + return yajl_gen_status_ok; + } + + std::vector<std::string> local_paths; + + if (this->jph_path_provider) { + this->jph_path_provider(ygc.ygc_obj_stack.top(), local_paths); + } else { + local_paths.emplace_back(this->jph_property); + } + + if (this->jph_children) { + for (const auto& lpath : local_paths) { + std::string full_path = lpath; + if (this->jph_path_provider) { + full_path += "/"; + } + int start_depth = ygc.ygc_depth; + + yajl_gen_string(handle, lpath); + yajl_gen_map_open(handle); + ygc.ygc_depth += 1; + + if (this->jph_obj_provider) { + static thread_local auto md + = lnav::pcre2pp::match_data::unitialized(); + + auto find_res = this->jph_regex->capture_from(full_path) + .into(md) + .matches(); + + ygc.ygc_obj_stack.push(this->jph_obj_provider( + {&md, yajlpp_provider_context::nindex}, + ygc.ygc_obj_stack.top())); + if (!ygc.ygc_default_stack.empty()) { + ygc.ygc_default_stack.push(this->jph_obj_provider( + {&md, yajlpp_provider_context::nindex}, + ygc.ygc_default_stack.top())); + } + } + + for (const auto& jph : this->jph_children->jpc_children) { + yajl_gen_status status = jph.gen(ygc, handle); + + const unsigned char* buf; + size_t len; + yajl_gen_get_buf(handle, &buf, &len); + if (status != yajl_gen_status_ok) { + log_error("yajl_gen failure for: %s -- %d", + jph.jph_property.c_str(), + status); + return status; + } + } + + if (this->jph_obj_provider) { + ygc.ygc_obj_stack.pop(); + if (!ygc.ygc_default_stack.empty()) { + ygc.ygc_default_stack.pop(); + } + } + + while (ygc.ygc_depth > start_depth) { + yajl_gen_map_close(handle); + ygc.ygc_depth -= 1; + } + } + } else if (this->jph_gen_callback != nullptr) { + return this->jph_gen_callback(ygc, *this, handle); + } + + return yajl_gen_status_ok; +} + +const char* const SCHEMA_TYPE_STRINGS[] = { + "any", + "boolean", + "integer", + "number", + "string", + "array", + "object", +}; + +yajl_gen_status +json_path_handler_base::gen_schema(yajlpp_gen_context& ygc) const +{ + if (this->jph_children) { + { + yajlpp_map schema(ygc.ygc_handle); + + if (this->jph_description && this->jph_description[0]) { + schema.gen("description"); + schema.gen(this->jph_description); + } + if (this->jph_is_pattern_property) { + ygc.ygc_path.emplace_back( + fmt::format(FMT_STRING("<{}>"), + this->jph_regex->get_name_for_capture(1))); + } else { + ygc.ygc_path.emplace_back(this->jph_property); + } + if (this->jph_children->jpc_definition_id.empty()) { + schema.gen("title"); + schema.gen(fmt::format(FMT_STRING("/{}"), + fmt::join(ygc.ygc_path, "/"))); + schema.gen("type"); + if (this->jph_is_array) { + if (this->jph_regex->get_pattern().find("#?") + == std::string::npos) + { + schema.gen("array"); + } else { + yajlpp_array type_array(ygc.ygc_handle); + + type_array.gen("array"); + for (auto schema_type : this->get_types()) { + type_array.gen( + SCHEMA_TYPE_STRINGS[(int) schema_type]); + } + } + schema.gen("items"); + yajl_gen_map_open(ygc.ygc_handle); + yajl_gen_string(ygc.ygc_handle, "type"); + this->gen_schema_type(ygc); + } else { + this->gen_schema_type(ygc); + } + this->jph_children->gen_schema(ygc); + if (this->jph_is_array) { + yajl_gen_map_close(ygc.ygc_handle); + } + } else { + schema.gen("title"); + schema.gen(fmt::format(FMT_STRING("/{}"), + fmt::join(ygc.ygc_path, "/"))); + this->jph_children->gen_schema(ygc); + } + ygc.ygc_path.pop_back(); + } + } else { + yajlpp_map schema(ygc.ygc_handle); + + if (this->jph_is_pattern_property) { + ygc.ygc_path.emplace_back(fmt::format( + FMT_STRING("<{}>"), this->jph_regex->get_name_for_capture(1))); + } else { + ygc.ygc_path.emplace_back(this->jph_property); + } + + schema.gen("title"); + schema.gen( + fmt::format(FMT_STRING("/{}"), fmt::join(ygc.ygc_path, "/"))); + if (this->jph_description && this->jph_description[0]) { + schema.gen("description"); + schema.gen(this->jph_description); + } + + schema.gen("type"); + + if (this->jph_is_array) { + if (this->jph_regex->get_pattern().find("#?") == std::string::npos) + { + schema.gen("array"); + } else { + yajlpp_array type_array(ygc.ygc_handle); + + type_array.gen("array"); + for (auto schema_type : this->get_types()) { + type_array.gen(SCHEMA_TYPE_STRINGS[(int) schema_type]); + } + } + yajl_gen_string(ygc.ygc_handle, "items"); + yajl_gen_map_open(ygc.ygc_handle); + yajl_gen_string(ygc.ygc_handle, "type"); + } + + this->gen_schema_type(ygc); + + if (!this->jph_examples.empty()) { + schema.gen("examples"); + + yajlpp_array example_array(ygc.ygc_handle); + for (const auto& ex : this->jph_examples) { + example_array.gen(ex); + } + } + + if (this->jph_is_array) { + yajl_gen_map_close(ygc.ygc_handle); + } + + ygc.ygc_path.pop_back(); + } + + return yajl_gen_status_ok; +} + +yajl_gen_status +json_path_handler_base::gen_schema_type(yajlpp_gen_context& ygc) const +{ + yajlpp_generator schema(ygc.ygc_handle); + + auto types = this->get_types(); + if (types.size() == 1) { + yajl_gen_string(ygc.ygc_handle, SCHEMA_TYPE_STRINGS[(int) types[0]]); + } else { + yajlpp_array type_array(ygc.ygc_handle); + + for (auto schema_type : types) { + type_array.gen(SCHEMA_TYPE_STRINGS[(int) schema_type]); + } + } + + for (auto& schema_type : types) { + switch (schema_type) { + case schema_type_t::STRING: + if (this->jph_min_length > 0) { + schema("minLength"); + schema(this->jph_min_length); + } + if (this->jph_max_length < INT_MAX) { + schema("maxLength"); + schema(this->jph_max_length); + } + if (this->jph_pattern_re) { + schema("pattern"); + schema(this->jph_pattern_re); + } + if (this->jph_enum_values) { + schema("enum"); + + yajlpp_array enum_array(ygc.ygc_handle); + for (int lpc = 0; this->jph_enum_values[lpc].first; lpc++) { + enum_array.gen(this->jph_enum_values[lpc].first); + } + } + break; + case schema_type_t::INTEGER: + case schema_type_t::NUMBER: + if (this->jph_min_value > LLONG_MIN) { + schema("minimum"); + schema(this->jph_min_value); + } + break; + default: + break; + } + } + + return yajl_gen_keys_must_be_strings; +} + +void +json_path_handler_base::walk( + const std::function< + void(const json_path_handler_base&, const std::string&, void*)>& cb, + void* root, + const std::string& base) const +{ + std::vector<std::string> local_paths; + + if (this->jph_path_provider) { + this->jph_path_provider(root, local_paths); + + for (auto& lpath : local_paths) { + cb(*this, + fmt::format(FMT_STRING("{}{}{}"), + base, + lpath, + this->jph_children ? "/" : ""), + nullptr); + } + if (this->jph_obj_deleter) { + local_paths.clear(); + this->jph_path_provider(root, local_paths); + } + } else { + local_paths.emplace_back(this->jph_property); + + std::string full_path = base + this->jph_property; + if (this->jph_children) { + full_path += "/"; + } + cb(*this, full_path, nullptr); + } + + if (this->jph_children) { + for (const auto& lpath : local_paths) { + for (const auto& jph : this->jph_children->jpc_children) { + static const intern_string_t POSS_SRC + = intern_string::lookup("possibilities"); + + std::string full_path = base + lpath; + if (this->jph_children) { + full_path += "/"; + } + json_path_container dummy{ + json_path_handler(this->jph_property, this->jph_regex), + }; + + yajlpp_parse_context ypc(POSS_SRC, &dummy); + void* child_root = root; + + ypc.set_path(full_path).with_obj(root).update_callbacks(); + if (this->jph_obj_provider) { + static thread_local auto md + = lnav::pcre2pp::match_data::unitialized(); + + std::string full_path = lpath + "/"; + + if (!this->jph_regex->capture_from(full_path) + .into(md) + .matches() + .ignore_error()) + { + ensure(false); + } + child_root = this->jph_obj_provider( + {&md, yajlpp_provider_context::nindex}, root); + } + + jph.walk(cb, child_root, full_path); + } + } + } else { + for (auto& lpath : local_paths) { + void* field = nullptr; + + if (this->jph_field_getter) { + field = this->jph_field_getter(root, lpath); + } + cb(*this, base + lpath, field); + } + } +} + +nonstd::optional<int> +json_path_handler_base::to_enum_value(const string_fragment& sf) const +{ + for (int lpc = 0; this->jph_enum_values[lpc].first; lpc++) { + const auto& ev = this->jph_enum_values[lpc]; + + if (sf == ev.first) { + return ev.second; + } + } + + return nonstd::nullopt; +} + +const char* +json_path_handler_base::to_enum_string(int value) const +{ + for (int lpc = 0; this->jph_enum_values[lpc].first; lpc++) { + const auto& ev = this->jph_enum_values[lpc]; + + if (ev.second == value) { + return ev.first; + } + } + + return ""; +} + +std::vector<json_path_handler_base::schema_type_t> +json_path_handler_base::get_types() const +{ + std::vector<schema_type_t> retval; + + if (this->jph_callbacks.yajl_boolean) { + retval.push_back(schema_type_t::BOOLEAN); + } + if (this->jph_callbacks.yajl_integer) { + retval.push_back(schema_type_t::INTEGER); + } + if (this->jph_callbacks.yajl_double || this->jph_callbacks.yajl_number) { + retval.push_back(schema_type_t::NUMBER); + } + if (this->jph_callbacks.yajl_string) { + retval.push_back(schema_type_t::STRING); + } + if (this->jph_children) { + retval.push_back(schema_type_t::OBJECT); + } + if (retval.empty()) { + retval.push_back(schema_type_t::ANY); + } + return retval; +} + +yajlpp_parse_context::yajlpp_parse_context( + intern_string_t source, const struct json_path_container* handlers) + : ypc_source(source), ypc_handlers(handlers) +{ + this->ypc_path.reserve(4096); + this->ypc_path.push_back('/'); + this->ypc_path.push_back('\0'); + this->ypc_callbacks = DEFAULT_CALLBACKS; + memset(&this->ypc_alt_callbacks, 0, sizeof(this->ypc_alt_callbacks)); +} + +int +yajlpp_parse_context::map_start(void* ctx) +{ + yajlpp_parse_context* ypc = (yajlpp_parse_context*) ctx; + int retval = 1; + + require(ypc->ypc_path.size() >= 2); + + ypc->ypc_path_index_stack.push_back(ypc->ypc_path.size() - 1); + + if (ypc->ypc_path.size() > 1 + && ypc->ypc_path[ypc->ypc_path.size() - 2] == '#') + { + ypc->ypc_array_index.back() += 1; + } + + if (ypc->ypc_alt_callbacks.yajl_start_map != nullptr) { + retval = ypc->ypc_alt_callbacks.yajl_start_map(ypc); + } + + return retval; +} + +int +yajlpp_parse_context::map_key(void* ctx, const unsigned char* key, size_t len) +{ + yajlpp_parse_context* ypc = (yajlpp_parse_context*) ctx; + int retval = 1; + + require(ypc->ypc_path.size() >= 2); + + ypc->ypc_path.resize(ypc->ypc_path_index_stack.back()); + if (ypc->ypc_path.back() != '/') { + ypc->ypc_path.push_back('/'); + } + for (size_t lpc = 0; lpc < len; lpc++) { + switch (key[lpc]) { + case '~': + ypc->ypc_path.push_back('~'); + ypc->ypc_path.push_back('0'); + break; + case '/': + ypc->ypc_path.push_back('~'); + ypc->ypc_path.push_back('1'); + break; + case '#': + ypc->ypc_path.push_back('~'); + ypc->ypc_path.push_back('2'); + break; + default: + ypc->ypc_path.push_back(key[lpc]); + break; + } + } + ypc->ypc_path.push_back('\0'); + + if (ypc->ypc_alt_callbacks.yajl_map_key != nullptr) { + retval = ypc->ypc_alt_callbacks.yajl_map_key(ctx, key, len); + } + + if (ypc->ypc_handlers != nullptr) { + ypc->update_callbacks(); + } + + ensure(ypc->ypc_path.size() >= 2); + + return retval; +} + +void +yajlpp_parse_context::update_callbacks(const json_path_container* orig_handlers, + int child_start) +{ + const json_path_container* handlers = orig_handlers; + + this->ypc_current_handler = nullptr; + + if (this->ypc_handlers == nullptr) { + return; + } + + this->ypc_sibling_handlers = orig_handlers; + this->ypc_callbacks = DEFAULT_CALLBACKS; + + if (handlers == nullptr) { + handlers = this->ypc_handlers; + this->ypc_handler_stack.clear(); + this->ypc_array_handler_count = 0; + } + + if (!this->ypc_active_paths.empty()) { + std::string curr_path(&this->ypc_path[0], this->ypc_path.size() - 1); + + if (this->ypc_active_paths.find(curr_path) + == this->ypc_active_paths.end()) + { + return; + } + } + + if (child_start == 0 && !this->ypc_obj_stack.empty()) { + while (this->ypc_obj_stack.size() > 1) { + this->ypc_obj_stack.pop(); + } + } + + auto path_frag = string_fragment::from_byte_range( + this->ypc_path.data(), 1 + child_start, this->ypc_path.size() - 1); + for (const auto& jph : handlers->jpc_children) { + static thread_local auto md = lnav::pcre2pp::match_data::unitialized(); + + if (jph.jph_regex->capture_from(path_frag) + .into(md) + .matches() + .ignore_error()) + { + auto cap = md[0].value(); + + if (jph.jph_is_array) { + this->ypc_array_handler_count += 1; + } + if (jph.jph_obj_provider) { + auto index = this->ypc_array_handler_count == 0 + ? static_cast<size_t>(-1) + : this->ypc_array_index[this->ypc_array_handler_count - 1]; + + if ((cap.sf_end != (int) this->ypc_path.size() - 1) + && (!jph.is_array() + || index != yajlpp_provider_context::nindex)) + { + this->ypc_obj_stack.push(jph.jph_obj_provider( + {&md, index, this}, this->ypc_obj_stack.top())); + } + } + + if (jph.jph_children) { + this->ypc_handler_stack.emplace_back(&jph); + + if (cap.sf_end != (int) this->ypc_path.size() - 1) { + this->update_callbacks(jph.jph_children, cap.sf_end); + return; + } + } else { + if (cap.sf_end != (int) this->ypc_path.size() - 1) { + continue; + } + + this->ypc_current_handler = &jph; + } + + if (jph.jph_callbacks.yajl_null != nullptr) { + this->ypc_callbacks.yajl_null = jph.jph_callbacks.yajl_null; + } + if (jph.jph_callbacks.yajl_boolean != nullptr) { + this->ypc_callbacks.yajl_boolean + = jph.jph_callbacks.yajl_boolean; + } + if (jph.jph_callbacks.yajl_integer != nullptr) { + this->ypc_callbacks.yajl_integer + = jph.jph_callbacks.yajl_integer; + } + if (jph.jph_callbacks.yajl_double != nullptr) { + this->ypc_callbacks.yajl_double = jph.jph_callbacks.yajl_double; + } + if (jph.jph_callbacks.yajl_string != nullptr) { + this->ypc_callbacks.yajl_string = jph.jph_callbacks.yajl_string; + } + if (jph.jph_is_array) { + this->ypc_array_handler_count -= 1; + } + return; + } + } +} + +int +yajlpp_parse_context::map_end(void* ctx) +{ + yajlpp_parse_context* ypc = (yajlpp_parse_context*) ctx; + int retval = 1; + + ypc->ypc_path.resize(ypc->ypc_path_index_stack.back()); + ypc->ypc_path.push_back('\0'); + ypc->ypc_path_index_stack.pop_back(); + + if (ypc->ypc_alt_callbacks.yajl_end_map != nullptr) { + retval = ypc->ypc_alt_callbacks.yajl_end_map(ctx); + } + + ypc->update_callbacks(); + + ensure(ypc->ypc_path.size() >= 2); + + return retval; +} + +int +yajlpp_parse_context::array_start(void* ctx) +{ + yajlpp_parse_context* ypc = (yajlpp_parse_context*) ctx; + int retval = 1; + + ypc->ypc_path_index_stack.push_back(ypc->ypc_path.size() - 1); + ypc->ypc_path[ypc->ypc_path.size() - 1] = '#'; + ypc->ypc_path.push_back('\0'); + ypc->ypc_array_index.push_back(-1); + + if (ypc->ypc_alt_callbacks.yajl_start_array != nullptr) { + retval = ypc->ypc_alt_callbacks.yajl_start_array(ctx); + } + + ypc->update_callbacks(); + + ensure(ypc->ypc_path.size() >= 2); + + return retval; +} + +int +yajlpp_parse_context::array_end(void* ctx) +{ + yajlpp_parse_context* ypc = (yajlpp_parse_context*) ctx; + int retval = 1; + + ypc->ypc_path.resize(ypc->ypc_path_index_stack.back()); + ypc->ypc_path.push_back('\0'); + ypc->ypc_path_index_stack.pop_back(); + ypc->ypc_array_index.pop_back(); + + if (ypc->ypc_alt_callbacks.yajl_end_array != nullptr) { + retval = ypc->ypc_alt_callbacks.yajl_end_array(ctx); + } + + ypc->update_callbacks(); + + ensure(ypc->ypc_path.size() >= 2); + + return retval; +} + +int +yajlpp_parse_context::handle_unused(void* ctx) +{ + yajlpp_parse_context* ypc = (yajlpp_parse_context*) ctx; + + if (ypc->ypc_ignore_unused) { + return 1; + } + + const json_path_handler_base* handler = ypc->ypc_current_handler; + lnav::console::user_message msg; + + if (handler != nullptr && strlen(handler->jph_synopsis) > 0 + && strlen(handler->jph_description) > 0) + { + auto help_text = handler->get_help_text(ypc); + std::vector<std::string> expected_types; + + if (ypc->ypc_callbacks.yajl_boolean + != (int (*)(void*, int)) yajlpp_parse_context::handle_unused) + { + expected_types.emplace_back("boolean"); + } + if (ypc->ypc_callbacks.yajl_integer + != (int (*)(void*, long long)) yajlpp_parse_context::handle_unused) + { + expected_types.emplace_back("integer"); + } + if (ypc->ypc_callbacks.yajl_double + != (int (*)(void*, double)) yajlpp_parse_context::handle_unused) + { + expected_types.emplace_back("float"); + } + if (ypc->ypc_callbacks.yajl_string + != (int (*)(void*, const unsigned char*, size_t)) + yajlpp_parse_context::handle_unused) + { + expected_types.emplace_back("string"); + } + if (!expected_types.empty()) { + help_text.appendf( + FMT_STRING(" expecting one of the following types: {}"), + fmt::join(expected_types, ", ")); + } + msg = lnav::console::user_message::warning( + attr_line_t("unexpected data for property ") + .append_quoted(lnav::roles::symbol( + ypc->get_full_path().to_string()))) + .with_help(help_text); + } else if (ypc->ypc_path[1]) { + msg = lnav::console::user_message::warning( + attr_line_t("unexpected value for property ") + .append_quoted( + lnav::roles::symbol(ypc->get_full_path().to_string()))); + } else { + msg = lnav::console::user_message::error("unexpected JSON value"); + } + + if (handler == nullptr) { + const json_path_container* accepted_handlers; + + if (ypc->ypc_sibling_handlers) { + accepted_handlers = ypc->ypc_sibling_handlers; + } else { + accepted_handlers = ypc->ypc_handlers; + } + + attr_line_t help_text; + + if (accepted_handlers->jpc_children.size() == 1 + && accepted_handlers->jpc_children.front().jph_is_array) + { + const auto& jph = accepted_handlers->jpc_children.front(); + + help_text.append("expecting an array of ") + .append(lnav::roles::variable(jph.jph_synopsis)) + .append(" values"); + } else { + help_text.append(lnav::roles::h2("Available Properties")) + .append("\n"); + for (const auto& jph : accepted_handlers->jpc_children) { + help_text.append(" ") + .append(lnav::roles::symbol(jph.jph_property)) + .append(lnav::roles::symbol( + jph.jph_children != nullptr ? "/" : "")) + .append(" ") + .append(lnav::roles::variable(jph.jph_synopsis)) + .append("\n"); + } + } + msg.with_help(help_text); + } + + msg.with_snippet(ypc->get_snippet()); + + ypc->report_error(msg); + + return 1; +} + +int +yajlpp_parse_context::handle_unused_or_delete(void* ctx) +{ + yajlpp_parse_context* ypc = (yajlpp_parse_context*) ctx; + + if (!ypc->ypc_handler_stack.empty() + && ypc->ypc_handler_stack.back()->jph_obj_deleter) + { + static thread_local auto md = lnav::pcre2pp::match_data::unitialized(); + + auto key_start = ypc->ypc_path_index_stack.back(); + auto path_frag = string_fragment::from_byte_range( + ypc->ypc_path.data(), key_start + 1, ypc->ypc_path.size() - 1); + yajlpp_provider_context provider_ctx{&md, static_cast<size_t>(-1)}; + ypc->ypc_handler_stack.back() + ->jph_regex->capture_from(path_frag) + .into(md) + .matches(); + + ypc->ypc_handler_stack.back()->jph_obj_deleter( + provider_ctx, ypc->ypc_obj_stack.top()); + return 1; + } + + return handle_unused(ctx); +} + +const yajl_callbacks yajlpp_parse_context::DEFAULT_CALLBACKS = { + yajlpp_parse_context::handle_unused_or_delete, + (int (*)(void*, int)) yajlpp_parse_context::handle_unused, + (int (*)(void*, long long)) yajlpp_parse_context::handle_unused, + (int (*)(void*, double)) yajlpp_parse_context::handle_unused, + nullptr, + (int (*)(void*, const unsigned char*, size_t)) + yajlpp_parse_context::handle_unused, + yajlpp_parse_context::map_start, + yajlpp_parse_context::map_key, + yajlpp_parse_context::map_end, + yajlpp_parse_context::array_start, + yajlpp_parse_context::array_end, +}; + +yajl_status +yajlpp_parse_context::parse(const unsigned char* jsonText, size_t jsonTextLen) +{ + this->ypc_json_text = jsonText; + this->ypc_json_text_len = jsonTextLen; + + yajl_status retval = yajl_parse(this->ypc_handle, jsonText, jsonTextLen); + + size_t consumed = yajl_get_bytes_consumed(this->ypc_handle); + + this->ypc_line_number + += std::count(&jsonText[0], &jsonText[consumed], '\n'); + + this->ypc_json_text = nullptr; + + if (retval != yajl_status_ok && this->ypc_error_reporter) { + auto* msg = yajl_get_error(this->ypc_handle, 1, jsonText, jsonTextLen); + + this->report_error( + lnav::console::user_message::error("invalid JSON") + .with_snippet(lnav::console::snippet::from(this->ypc_source, + (const char*) msg) + .with_line(this->get_line_number()))); + yajl_free_error(this->ypc_handle, msg); + } + + return retval; +} + +yajl_status +yajlpp_parse_context::complete_parse() +{ + yajl_status retval = yajl_complete_parse(this->ypc_handle); + + if (retval != yajl_status_ok && this->ypc_error_reporter) { + auto* msg = yajl_get_error(this->ypc_handle, 0, nullptr, 0); + + this->report_error(lnav::console::user_message::error("invalid JSON") + .with_reason((const char*) msg) + .with_snippet(this->get_snippet())); + yajl_free_error(this->ypc_handle, msg); + } + + return retval; +} + +bool +yajlpp_parse_context::parse_doc(const string_fragment& sf) +{ + bool retval = true; + + this->ypc_json_text = (const unsigned char*) sf.data(); + this->ypc_json_text_len = sf.length(); + + auto rc = yajl_parse(this->ypc_handle, this->ypc_json_text, sf.length()); + size_t consumed = yajl_get_bytes_consumed(this->ypc_handle); + this->ypc_total_consumed += consumed; + this->ypc_line_number += std::count( + &this->ypc_json_text[0], &this->ypc_json_text[consumed], '\n'); + + if (rc != yajl_status_ok) { + if (this->ypc_error_reporter) { + auto* msg = yajl_get_error(this->ypc_handle, + 1, + this->ypc_json_text, + this->ypc_json_text_len); + + this->report_error( + lnav::console::user_message::error("invalid JSON") + .with_reason((const char*) msg) + .with_snippet(this->get_snippet())); + yajl_free_error(this->ypc_handle, msg); + } + retval = false; + } else if (this->complete_parse() != yajl_status_ok) { + retval = false; + } + + this->ypc_json_text = nullptr; + + return retval; +} + +const intern_string_t +yajlpp_parse_context::get_path() const +{ + if (this->ypc_path.size() <= 1) { + return intern_string_t(); + } + return intern_string::lookup(&this->ypc_path[1], this->ypc_path.size() - 2); +} + +const intern_string_t +yajlpp_parse_context::get_full_path() const +{ + if (this->ypc_path.size() <= 1) { + static const intern_string_t SLASH = intern_string::lookup("/"); + + return SLASH; + } + return intern_string::lookup(&this->ypc_path[0], this->ypc_path.size() - 1); +} + +void +yajlpp_parse_context::reset(const struct json_path_container* handlers) +{ + this->ypc_handlers = handlers; + this->ypc_path.clear(); + this->ypc_path.push_back('/'); + this->ypc_path.push_back('\0'); + this->ypc_path_index_stack.clear(); + this->ypc_array_index.clear(); + this->ypc_array_handler_count = 0; + this->ypc_callbacks = DEFAULT_CALLBACKS; + memset(&this->ypc_alt_callbacks, 0, sizeof(this->ypc_alt_callbacks)); + this->ypc_sibling_handlers = nullptr; + this->ypc_current_handler = nullptr; + while (!this->ypc_obj_stack.empty()) { + this->ypc_obj_stack.pop(); + } +} + +void +yajlpp_parse_context::set_static_handler(const json_path_handler_base& jph) +{ + this->ypc_path.clear(); + this->ypc_path.push_back('/'); + this->ypc_path.push_back('\0'); + this->ypc_path_index_stack.clear(); + this->ypc_array_index.clear(); + this->ypc_array_handler_count = 0; + if (jph.jph_callbacks.yajl_null != nullptr) { + this->ypc_callbacks.yajl_null = jph.jph_callbacks.yajl_null; + } + if (jph.jph_callbacks.yajl_boolean != nullptr) { + this->ypc_callbacks.yajl_boolean = jph.jph_callbacks.yajl_boolean; + } + if (jph.jph_callbacks.yajl_integer != nullptr) { + this->ypc_callbacks.yajl_integer = jph.jph_callbacks.yajl_integer; + } + if (jph.jph_callbacks.yajl_double != nullptr) { + this->ypc_callbacks.yajl_double = jph.jph_callbacks.yajl_double; + } + if (jph.jph_callbacks.yajl_string != nullptr) { + this->ypc_callbacks.yajl_string = jph.jph_callbacks.yajl_string; + } +} + +yajlpp_parse_context& +yajlpp_parse_context::set_path(const std::string& path) +{ + this->ypc_path.resize(path.size() + 1); + std::copy(path.begin(), path.end(), this->ypc_path.begin()); + this->ypc_path[path.size()] = '\0'; + for (size_t lpc = 0; lpc < path.size(); lpc++) { + switch (path[lpc]) { + case '/': + this->ypc_path_index_stack.push_back( + this->ypc_path_index_stack.empty() ? 1 : 0 + lpc); + break; + } + } + return *this; +} + +const char* +yajlpp_parse_context::get_path_fragment(int offset, + char* frag_in, + size_t& len_out) const +{ + const char* retval; + size_t start, end; + + if (offset < 0) { + offset = ((int) this->ypc_path_index_stack.size()) + offset; + } + start = this->ypc_path_index_stack[offset] + ((offset == 0) ? 0 : 1); + if ((offset + 1) < (int) this->ypc_path_index_stack.size()) { + end = this->ypc_path_index_stack[offset + 1]; + } else { + end = this->ypc_path.size() - 1; + } + if (this->ypc_handlers) { + len_out + = json_ptr::decode(frag_in, &this->ypc_path[start], end - start); + retval = frag_in; + } else { + retval = &this->ypc_path[start]; + len_out = end - start; + } + + return retval; +} + +int +yajlpp_parse_context::get_line_number() const +{ + if (this->ypc_handle != nullptr && this->ypc_json_text) { + size_t consumed = yajl_get_bytes_consumed(this->ypc_handle); + long current_count = std::count( + &this->ypc_json_text[0], &this->ypc_json_text[consumed], '\n'); + + return this->ypc_line_number + current_count; + } + return this->ypc_line_number; +} + +void +yajlpp_gen_context::gen() +{ + yajlpp_map root(this->ygc_handle); + + for (const auto& jph : this->ygc_handlers->jpc_children) { + jph.gen(*this, this->ygc_handle); + } +} + +void +yajlpp_gen_context::gen_schema(const json_path_container* handlers) +{ + if (handlers == nullptr) { + handlers = this->ygc_handlers; + } + + { + yajlpp_map schema(this->ygc_handle); + + if (!handlers->jpc_schema_id.empty()) { + schema.gen("$id"); + schema.gen(handlers->jpc_schema_id); + schema.gen("title"); + schema.gen(handlers->jpc_schema_id); + } + schema.gen("$schema"); + schema.gen("http://json-schema.org/draft-07/schema#"); + if (!handlers->jpc_description.empty()) { + schema.gen("description"); + schema.gen(handlers->jpc_description); + } + handlers->gen_schema(*this); + + if (!this->ygc_schema_definitions.empty()) { + schema.gen("definitions"); + + yajlpp_map defs(this->ygc_handle); + for (auto& container : this->ygc_schema_definitions) { + defs.gen(container.first); + + yajlpp_map def(this->ygc_handle); + + def.gen("title"); + def.gen(container.first); + if (!container.second->jpc_description.empty()) { + def.gen("description"); + def.gen(container.second->jpc_description); + } + def.gen("type"); + def.gen("object"); + def.gen("$$target"); + def.gen(fmt::format(FMT_STRING("#/definitions/{}"), + container.first)); + container.second->gen_properties(*this); + } + } + } +} + +yajlpp_gen_context& +yajlpp_gen_context::with_context(yajlpp_parse_context& ypc) +{ + this->ygc_obj_stack = ypc.ypc_obj_stack; + if (ypc.ypc_current_handler == nullptr && !ypc.ypc_handler_stack.empty() + && ypc.ypc_handler_stack.back() != nullptr) + { + this->ygc_handlers = ypc.ypc_handler_stack.back()->jph_children; + this->ygc_depth += 1; + } + return *this; +} + +json_path_handler& +json_path_handler::with_children(const json_path_container& container) +{ + this->jph_children = &container; + return *this; +} + +lnav::console::snippet +yajlpp_parse_context::get_snippet() const +{ + auto line_number = this->get_line_number(); + attr_line_t content; + + if (this->ypc_json_text != nullptr) { + auto in_text_line = line_number - this->ypc_line_number; + const auto* line_start = this->ypc_json_text; + auto text_len_remaining = this->ypc_json_text_len; + + while (in_text_line > 0) { + const auto* line_end = (const unsigned char*) memchr( + line_start, '\n', text_len_remaining); + if (line_end == nullptr) { + break; + } + + text_len_remaining -= (line_end - line_start) + 1; + line_start = line_end + 1; + in_text_line -= 1; + } + + if (text_len_remaining > 0) { + const auto* line_end = (const unsigned char*) memchr( + line_start, '\n', text_len_remaining); + if (line_end) { + text_len_remaining = (line_end - line_start); + } + content.append( + string_fragment::from_bytes(line_start, text_len_remaining)); + } + } + + content.with_attr_for_all(VC_ROLE.value(role_t::VCR_QUOTED_CODE)); + return lnav::console::snippet::from(this->ypc_source, content) + .with_line(line_number); +} + +void +json_path_handler_base::validate_string(yajlpp_parse_context& ypc, + string_fragment sf) const +{ + if (this->jph_pattern) { + if (!this->jph_pattern->find_in(sf).ignore_error()) { + this->report_pattern_error(&ypc, sf.to_string()); + } + } + if (sf.empty() && this->jph_min_length > 0) { + ypc.report_error(lnav::console::user_message::error( + attr_line_t("invalid value for option ") + .append_quoted(lnav::roles::symbol( + ypc.get_full_path().to_string()))) + .with_reason("empty values are not allowed") + .with_snippet(ypc.get_snippet()) + .with_help(this->get_help_text(&ypc))); + } else if (sf.length() < this->jph_min_length) { + ypc.report_error( + lnav::console::user_message::error( + attr_line_t() + .append_quoted(sf) + .append(" is not a valid value for option ") + .append_quoted( + lnav::roles::symbol(ypc.get_full_path().to_string()))) + .with_reason(attr_line_t("value must be at least ") + .append(lnav::roles::number( + fmt::to_string(this->jph_min_length))) + .append(" characters long")) + .with_snippet(ypc.get_snippet()) + .with_help(this->get_help_text(&ypc))); + } +} + +void +json_path_handler_base::report_pattern_error(yajlpp_parse_context* ypc, + const std::string& value_str) const +{ + ypc->report_error( + lnav::console::user_message::error( + attr_line_t() + .append_quoted(value_str) + .append(" is not a valid value for option ") + .append_quoted( + lnav::roles::symbol(ypc->get_full_path().to_string()))) + .with_snippet(ypc->get_snippet()) + .with_reason(attr_line_t("value does not match pattern: ") + .append(lnav::roles::symbol(this->jph_pattern_re))) + .with_help(this->get_help_text(ypc))); +} + +attr_line_t +json_path_handler_base::get_help_text(const std::string& full_path) const +{ + attr_line_t retval; + + retval.append(lnav::roles::h2("Property Synopsis")) + .append("\n ") + .append(lnav::roles::symbol(full_path)) + .append(" ") + .append(lnav::roles::variable(this->jph_synopsis)) + .append("\n") + .append(lnav::roles::h2("Description")) + .append("\n ") + .append(this->jph_description) + .append("\n"); + + if (this->jph_enum_values != nullptr) { + retval.append(lnav::roles::h2("Allowed Values")).append("\n "); + + for (int lpc = 0; this->jph_enum_values[lpc].first; lpc++) { + const auto& ev = this->jph_enum_values[lpc]; + + retval.append(lpc == 0 ? "" : ", ") + .append(lnav::roles::symbol(ev.first)); + } + } + + if (!this->jph_examples.empty()) { + retval + .append(lnav::roles::h2( + this->jph_examples.size() == 1 ? "Example" : "Examples")) + .append("\n"); + + for (const auto& ex : this->jph_examples) { + retval.appendf(FMT_STRING(" {}\n"), ex); + } + } + + return retval; +} + +attr_line_t +json_path_handler_base::get_help_text(yajlpp_parse_context* ypc) const +{ + return this->get_help_text(ypc->get_full_path().to_string()); +} + +void +json_path_handler_base::report_min_value_error(yajlpp_parse_context* ypc, + long long value) const +{ + ypc->report_error( + lnav::console::user_message::error( + attr_line_t() + .append_quoted(fmt::to_string(value)) + .append(" is not a valid value for option ") + .append_quoted( + lnav::roles::symbol(ypc->get_full_path().to_string()))) + .with_reason(attr_line_t("value must be greater than or equal to ") + .append(lnav::roles::number( + fmt::to_string(this->jph_min_value)))) + .with_snippet(ypc->get_snippet()) + .with_help(this->get_help_text(ypc))); +} + +void +json_path_handler_base::report_duration_error( + yajlpp_parse_context* ypc, + const std::string& value_str, + const relative_time::parse_error& pe) const +{ + ypc->report_error(lnav::console::user_message::error( + attr_line_t() + .append_quoted(value_str) + .append(" is not a valid duration value " + "for option ") + .append_quoted(lnav::roles::symbol( + ypc->get_full_path().to_string()))) + .with_snippet(ypc->get_snippet()) + .with_reason(pe.pe_msg) + .with_help(this->get_help_text(ypc))); +} + +void +json_path_handler_base::report_enum_error(yajlpp_parse_context* ypc, + const std::string& value_str) const +{ + ypc->report_error(lnav::console::user_message::error( + attr_line_t() + .append_quoted(value_str) + .append(" is not a valid value for option ") + .append_quoted(lnav::roles::symbol( + ypc->get_full_path().to_string()))) + .with_snippet(ypc->get_snippet()) + .with_help(this->get_help_text(ypc))); +} + +void +json_path_handler_base::report_error(yajlpp_parse_context* ypc, + const std::string& value, + lnav::console::user_message um) const +{ + ypc->report_error(um.with_snippet(ypc->get_snippet()) + .with_help(this->get_help_text(ypc))); +} + +void +json_path_container::gen_schema(yajlpp_gen_context& ygc) const +{ + if (!this->jpc_definition_id.empty()) { + ygc.ygc_schema_definitions[this->jpc_definition_id] = this; + + yajl_gen_string(ygc.ygc_handle, "$ref"); + yajl_gen_string(ygc.ygc_handle, + fmt::format(FMT_STRING("#/definitions/{}"), + this->jpc_definition_id)); + return; + } + + this->gen_properties(ygc); +} + +void +json_path_container::gen_properties(yajlpp_gen_context& ygc) const +{ + auto pattern_count = count_if( + this->jpc_children.begin(), this->jpc_children.end(), [](auto& jph) { + return jph.jph_is_pattern_property; + }); + auto plain_count = this->jpc_children.size() - pattern_count; + + if (plain_count > 0) { + yajl_gen_string(ygc.ygc_handle, "properties"); + { + yajlpp_map properties(ygc.ygc_handle); + + for (const auto& child_handler : this->jpc_children) { + if (child_handler.jph_is_pattern_property) { + continue; + } + properties.gen(child_handler.jph_property); + child_handler.gen_schema(ygc); + } + } + } + if (pattern_count > 0) { + yajl_gen_string(ygc.ygc_handle, "patternProperties"); + { + yajlpp_map properties(ygc.ygc_handle); + + for (const auto& child_handler : this->jpc_children) { + if (!child_handler.jph_is_pattern_property) { + continue; + } + properties.gen(child_handler.jph_property); + child_handler.gen_schema(ygc); + } + } + } + + yajl_gen_string(ygc.ygc_handle, "additionalProperties"); + yajl_gen_bool(ygc.ygc_handle, false); +} + +static void +schema_printer(FILE* file, const char* str, size_t len) +{ + fwrite(str, len, 1, file); +} + +void +dump_schema_to(const json_path_container& jpc, const char* internals_dir) +{ + yajlpp_gen genner; + yajlpp_gen_context ygc(genner, jpc); + auto internals_dir_path = ghc::filesystem::path(internals_dir); + auto schema_file_name = ghc::filesystem::path(jpc.jpc_schema_id).filename(); + auto schema_path = internals_dir_path / schema_file_name; + auto file = std::unique_ptr<FILE, decltype(&fclose)>( + fopen(schema_path.c_str(), "w+"), fclose); + + if (!file.get()) { + return; + } + + yajl_gen_config(genner, yajl_gen_beautify, true); + yajl_gen_config( + genner, yajl_gen_print_callback, schema_printer, file.get()); + + ygc.gen_schema(); +} + +string_fragment +yajlpp_gen::to_string_fragment() +{ + const unsigned char* buf; + size_t len; + + yajl_gen_get_buf(this->yg_handle.in(), &buf, &len); + + return string_fragment::from_bytes(buf, len); +} |