From 5068d34c08f951a7ea6257d305a1627b09a95817 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 4 May 2024 19:44:55 +0200 Subject: Adding upstream version 0.11.1. Signed-off-by: Daniel Baumann --- src/yajlpp/json_ptr.hh | 136 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 136 insertions(+) create mode 100644 src/yajlpp/json_ptr.hh (limited to 'src/yajlpp/json_ptr.hh') diff --git a/src/yajlpp/json_ptr.hh b/src/yajlpp/json_ptr.hh new file mode 100644 index 0000000..f7822ab --- /dev/null +++ b/src/yajlpp/json_ptr.hh @@ -0,0 +1,136 @@ +/** + * Copyright (c) 2014-2019, 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 TIMOTHY STACK 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 json_ptr.hh + */ + +#ifndef json_ptr_hh +#define json_ptr_hh + +#include +#include + +#include +#include +#include +#include + +#include "base/auto_mem.hh" +#include "yajl/api/yajl_parse.h" +#include "yajl/api/yajl_tree.h" + +class json_ptr_walk { +public: + const static yajl_callbacks callbacks; + + json_ptr_walk() + { + this->jpw_handle = yajl_alloc(&callbacks, nullptr, this); + } + + yajl_status parse(const char* buffer, ssize_t len); + + yajl_status complete_parse(); + + void update_error_msg(yajl_status status, const char* buffer, ssize_t len); + + void clear() { this->jpw_values.clear(); } + + void inc_array_index() + { + if (!this->jpw_array_indexes.empty() + && this->jpw_array_indexes.back() != -1) { + this->jpw_array_indexes.back() += 1; + } + } + + std::string current_ptr(); + + struct walk_triple { + walk_triple(std::string ptr, yajl_type type, std::string value) + : wt_ptr(std::move(ptr)), wt_type(type), wt_value(std::move(value)) + { + } + + std::string wt_ptr; + yajl_type wt_type; + std::string wt_value; + }; + + using walk_list_t = std::vector; + + auto_mem jpw_handle{yajl_free}; + std::string jpw_error_msg; + walk_list_t jpw_values; + std::vector jpw_keys; + std::vector jpw_array_indexes; + size_t jpw_max_ptr_len{0}; +}; + +class json_ptr { +public: + enum class match_state_t { + DONE, + VALUE, + ERR_INVALID_TYPE, + ERR_NO_SLASH, + ERR_INVALID_ESCAPE, + ERR_INVALID_INDEX, + }; + + static size_t encode(char* dst, + size_t dst_len, + const char* src, + size_t src_len = -1); + + static size_t decode(char* dst, const char* src, ssize_t src_len = -1); + + json_ptr(const char* value) : jp_value(value), jp_pos(value) {} + + bool expect_map(int32_t& depth, int32_t& index); + + bool at_key(int32_t depth, const char* component, ssize_t len = -1); + + void exit_container(int32_t& depth, int32_t& index); + + bool expect_array(int32_t& depth, int32_t& index); + + bool at_index(int32_t& depth, int32_t& index, bool primitive = true); + + bool reached_end() const { return this->jp_pos[0] == '\0'; } + + std::string error_msg() const; + + const char* jp_value; + const char* jp_pos; + int32_t jp_depth{0}; + int32_t jp_array_index{-1}; + match_state_t jp_state{match_state_t::VALUE}; +}; + +#endif -- cgit v1.2.3