add PIJSON, yet without doc
This commit is contained in:
340
libs/main/core/pijson.cpp
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340
libs/main/core/pijson.cpp
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/*
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PIP - Platform Independent Primitives
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JSON class
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Ivan Pelipenko peri4ko@yandex.ru
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "pijson.h"
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//! \~\class PIJSON pijson.h
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//! \~\details
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//! \~english \section PIJSON_sec0 Synopsis
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//! \~russian \section PIJSON_sec0 Краткий обзор
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//! \~english
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//!
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//! \~russian
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//!
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PIJSON PIJSON::newObject() {
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PIJSON ret;
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ret.c_type = Object;
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return ret;
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}
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PIJSON PIJSON::newArray() {
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PIJSON ret;
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ret.c_type = Array;
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return ret;
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}
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void PIJSON::setValue(const PIVariant & v) {
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c_value = v;
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switch (v.type()) {
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case PIVariant::pivBool: c_type = Boolean; break;
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case PIVariant::pivUChar:
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case PIVariant::pivShort:
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case PIVariant::pivUShort:
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case PIVariant::pivInt:
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case PIVariant::pivUInt:
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case PIVariant::pivLLong:
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case PIVariant::pivULLong:
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case PIVariant::pivFloat:
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case PIVariant::pivDouble:
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case PIVariant::pivLDouble: c_type = Number; break;
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case PIVariant::pivString: c_type = String; break;
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default: c_type = Invalid; break;
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}
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}
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void PIJSON::clear() {
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c_type = Invalid;
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c_value = PIVariant();
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c_name.clear();
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c_object.clear();
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c_array.clear();
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}
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int PIJSON::size() const {
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if (!isArray())
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return 0;
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return c_array.size_s();
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}
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bool PIJSON::contains(const PIString & key) const {
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if (!isObject()) return false;
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return c_object.contains(key);
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}
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void PIJSON::resize(int new_size) {
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c_array.resize(new_size);
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c_type = Array;
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}
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const PIJSON & PIJSON::operator[](int index) const {
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if (!isArray())
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return nullEntry();
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return c_array[index];
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}
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PIJSON & PIJSON::operator[](int index) {
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c_type = Array;
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PIJSON & ret(c_array[index]);
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return ret;
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}
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PIJSON & PIJSON::operator=(const PIJSON & v) {
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c_type = v.c_type;
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c_value = v.c_value;
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c_object = v.c_object;
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c_array = v.c_array;
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return *this;
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}
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PIJSON PIJSON::operator[](const PIString & key) const {
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if (!isObject())
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return nullEntry();
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if (!c_object.contains(key))
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return nullEntry();
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return c_object.value(key);
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}
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PIJSON & PIJSON::operator[](const PIString & key) {
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c_type = Object;
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PIJSON & ret(c_object[key]);
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ret.c_name = key;
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return ret;
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}
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PIString PIJSON::toJSON() const {
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PIString ret;
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print(ret, *this, "", true);
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return ret;
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}
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PIJSON PIJSON::fromJSON(PIString str) {
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return parseValue(str);
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}
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PIJSON & PIJSON::nullEntry() {
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static PIJSON ret;
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ret.clear();
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return ret;
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}
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PIString PIJSON::parseName(PIString & s) {
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//piCout << "\n\n\n parseName" << s;
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PIString ret;
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ret = s.takeRange('"', '"');
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s.trim();
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if (s.isEmpty()) return PIString();
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if (s[0] != ':') return PIString();
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s.remove(0).trim();
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return PIJSON::stringUnmask(ret);
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}
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PIJSON PIJSON::parseValue(PIString & s) {
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PIJSON ret;
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//piCout << "\n\n\n parseValue" << s;
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s.trim();
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if (s.isEmpty()) return ret;
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if (s[0] == '{')
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ret = parseObject(s.takeRange('{', '}'));
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else if (s[0] == '[')
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ret = parseArray(s.takeRange('[', ']'));
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else {
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s.trim();
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if (s.startsWith('"')) {
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ret.c_type = PIJSON::String;
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ret.c_value = PIJSON::stringUnmask(s.takeRange('"', '"'));
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} else {
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PIString value;
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int ind = s.find(',');
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if (ind >= 0) {
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value = s.takeLeft(ind).trim().toLowerCase();
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} else {
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value = s;
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s.clear();
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}
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//piCout << "\n\n\n parseValue value = \"" << value << "\"";
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if (value == "null") {
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ret.c_type = PIJSON::Null;
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} else if (value == "true") {
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ret.c_type = PIJSON::Boolean;
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ret.c_value = true;
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} else if (value == "false") {
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ret.c_type = PIJSON::Boolean;
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ret.c_value = false;
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} else {
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ret.c_type = PIJSON::Number;
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ret.c_value = value;
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}
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}
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}
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return ret;
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}
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PIJSON PIJSON::parseObject(PIString s) {
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//piCout << "\n\n\n parseObject" << s;
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PIJSON ret;
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ret.c_type = PIJSON::Object;
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while (s.isNotEmpty()) {
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PIString name = PIJSON::stringUnmask(parseName(s));
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PIJSON value = parseValue(s);
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auto & child(ret.c_object[name]);
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child = value;
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child.c_name = name;
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s.trim();
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if (s.isEmpty()) break;
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if (s[0] != ',') break;
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s.remove(0);
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}
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return ret;
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}
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PIJSON PIJSON::parseArray(PIString s) {
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//piCout << "\n\n\n parseArray" << s;
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PIJSON ret;
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ret.c_type = PIJSON::Array;
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while (s.isNotEmpty()) {
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PIJSON value = parseValue(s);
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ret.c_array << value;
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s.trim();
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if (s.isEmpty()) break;
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if (s[0] != ',') break;
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s.remove(0);
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}
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return ret;
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}
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PIString PIJSON::stringMask(const PIString & s) {
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PIString ret;
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for (auto c: s) {
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if (!c.isAscii()) {
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ret += "\\u" + PIString::fromNumber(c.unicode16Code(), 16).expandLeftTo(4, '0');
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} else {
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char ca = c.toAscii();
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switch (ca) {
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case '"' : ret += "\\\""; break;
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case '\\': ret += "\\\\"; break;
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case '/' : ret += "\\/" ; break;
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case '\b': ret += "\\b" ; break;
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case '\f': ret += "\\f" ; break;
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case '\n': ret += "\\n" ; break;
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case '\r': ret += "\\r" ; break;
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case '\t': ret += "\\t" ; break;
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default: ret += ca;
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}
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}
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}
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return ret;
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}
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PIString PIJSON::stringUnmask(const PIString & s) {
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PIString ret;
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for (int i = 0; i < s.size_s(); ++i) {
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char ca = s[i].toAscii();
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if (ca == '\\') {
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if (i == s.size_s() - 1) continue;
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++i;
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char na = s[i].toAscii();
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switch (na) {
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case '"' : ret += '\"'; break;
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case '\\': ret += '\\'; break;
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case '/' : ret += '/' ; break;
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case 'b' : ret += '\b'; break;
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case 'f' : ret += '\f'; break;
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case 'n' : ret += '\n'; break;
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case 'r' : ret += '\r'; break;
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case 't' : ret += '\t'; break;
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case 'u' :
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ret += PIChar(s.mid(i + 1, 4).toUShort(16));
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i += 4;
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break;
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default: break;
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}
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} else {
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ret += s[i];
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}
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}
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return ret;
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}
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void PIJSON::print(PIString & s, const PIJSON & v, PIString tab, bool transform, bool comma) {
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s += tab;
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/*
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switch (v.c_type) {
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case JSONEntry::Invalid: s << "(Invalid)"; break;
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case JSONEntry::Null: s << "(Null)"; break;
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case JSONEntry::Boolean: s << "(Boolean)"; break;
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case JSONEntry::Number: s << "(Number)"; break;
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case JSONEntry::String: s << "(String)"; break;
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case JSONEntry::Object: s << "(Object)"; break;
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case JSONEntry::Array: s << "(Array)"; break;
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}
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*/
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if (v.name().isNotEmpty()) s += '"' + (transform ? stringMask(v.name()) : v.name()) + "\": ";
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switch (v.c_type) {
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case PIJSON::Invalid: break;
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case PIJSON::Null: s += "null"; break;
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case PIJSON::Boolean: s += PIString::fromBool(v.c_value.toBool()); break;
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case PIJSON::Number: s += v.c_value.toString(); break;
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case PIJSON::String: s += '"' + (transform ? stringMask(v.c_value.toString()) : v.c_value.toString()) + '"'; break;
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case PIJSON::Object:
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s += "{\n";
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{
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PIString ntab = tab + " ";
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auto it = v.c_object.makeIterator();
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int cnt = 0;
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while (it.next())
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print(s, it.value(), ntab, transform, ++cnt < v.c_object.size_s());
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}
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s += tab + "}";
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break;
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case PIJSON::Array:
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s += "[\n";
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{
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PIString ntab = tab + " ";
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for (int i = 0; i < v.c_array.size_s(); ++i)
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print(s, v.c_array[i], ntab, transform, i < v.c_array.size_s() - 1);
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}
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s += tab + "]";
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break;
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}
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if (comma) s += ',';
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s += "\n";
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}
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