| /* JSON trees |
| Copyright (C) 2017-2019 Free Software Foundation, Inc. |
| Contributed by David Malcolm <dmalcolm@redhat.com>. |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 3, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef GCC_JSON_H |
| #define GCC_JSON_H |
| |
| /* Implementation of JSON, a lightweight data-interchange format. |
| |
| See http://www.json.org/ |
| and http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-404.pdf |
| and https://tools.ietf.org/html/rfc7159 |
| |
| Supports creating a DOM-like tree of json::value *, and then dumping |
| json::value * to text. */ |
| |
| namespace json |
| { |
| |
| /* Forward decls of json::value and its subclasses (using indentation |
| to denote inheritance. */ |
| |
| class value; |
| class object; |
| class array; |
| class number; |
| class string; |
| class literal; |
| |
| /* An enum for discriminating the subclasses of json::value. */ |
| |
| enum kind |
| { |
| /* class json::object. */ |
| JSON_OBJECT, |
| |
| /* class json::array. */ |
| JSON_ARRAY, |
| |
| /* class json::number. */ |
| JSON_NUMBER, |
| |
| /* class json::string. */ |
| JSON_STRING, |
| |
| /* class json::literal uses these three values to identify the |
| particular literal. */ |
| JSON_TRUE, |
| JSON_FALSE, |
| JSON_NULL |
| }; |
| |
| /* Base class of JSON value. */ |
| |
| class value |
| { |
| public: |
| virtual ~value () {} |
| virtual enum kind get_kind () const = 0; |
| virtual void print (pretty_printer *pp) const = 0; |
| |
| void dump (FILE *) const; |
| }; |
| |
| /* Subclass of value for objects: an unordered collection of |
| key/value pairs. */ |
| |
| class object : public value |
| { |
| public: |
| ~object (); |
| |
| enum kind get_kind () const FINAL OVERRIDE { return JSON_OBJECT; } |
| void print (pretty_printer *pp) const FINAL OVERRIDE; |
| |
| void set (const char *key, value *v); |
| |
| private: |
| typedef hash_map <char *, value *, |
| simple_hashmap_traits<nofree_string_hash, value *> > map_t; |
| map_t m_map; |
| }; |
| |
| /* Subclass of value for arrays. */ |
| |
| class array : public value |
| { |
| public: |
| ~array (); |
| |
| enum kind get_kind () const FINAL OVERRIDE { return JSON_ARRAY; } |
| void print (pretty_printer *pp) const FINAL OVERRIDE; |
| |
| void append (value *v); |
| |
| private: |
| auto_vec<value *> m_elements; |
| }; |
| |
| /* Subclass of value for numbers. */ |
| |
| class number : public value |
| { |
| public: |
| number (double value) : m_value (value) {} |
| |
| enum kind get_kind () const FINAL OVERRIDE { return JSON_NUMBER; } |
| void print (pretty_printer *pp) const FINAL OVERRIDE; |
| |
| double get () const { return m_value; } |
| |
| private: |
| double m_value; |
| }; |
| |
| /* Subclass of value for strings. */ |
| |
| class string : public value |
| { |
| public: |
| string (const char *utf8); |
| ~string () { free (m_utf8); } |
| |
| enum kind get_kind () const FINAL OVERRIDE { return JSON_STRING; } |
| void print (pretty_printer *pp) const FINAL OVERRIDE; |
| |
| const char *get_string () const { return m_utf8; } |
| |
| private: |
| char *m_utf8; |
| }; |
| |
| /* Subclass of value for the three JSON literals "true", "false", |
| and "null". */ |
| |
| class literal : public value |
| { |
| public: |
| literal (enum kind kind) : m_kind (kind) {} |
| |
| /* Construct literal for a boolean value. */ |
| literal (bool value): m_kind (value ? JSON_TRUE : JSON_FALSE) {} |
| |
| enum kind get_kind () const FINAL OVERRIDE { return m_kind; } |
| void print (pretty_printer *pp) const FINAL OVERRIDE; |
| |
| private: |
| enum kind m_kind; |
| }; |
| |
| } // namespace json |
| |
| #endif /* GCC_JSON_H */ |