add parser unicode

src/json.cpp

@@ -4,6 +4,7 @@
 
 #include "json.h"
 #include "exception.h"
+#include <cmath>
 
 namespace simpleJson {
 
@@ -793,7 +794,20 @@ namespace simpleJson {
                     ch == '\t') {
                     str += ch;
                 } else if (ch == 'u') {
-                    //unicode TODO
+                    std::string unicode_str;
+                    for (int i = 0; i < 4; i ++) {
+                        reader.get_char();
+                        ch = reader.curr_char();
+                        if (ch >= '0' && ch <= '9' || ch >= 'a' && ch <= 'f' || ch >= 'A' && ch <= 'F') {
+                            unicode_str += ch;
+                        } else {
+                            throw JsonInvalidUnicodeSym(reader.get_curr_line(), reader.get_curr_col(), ch);
+                        }
+                    }
+                    long unicode = std::stol(unicode_str.data(), nullptr, 16);
+                    std::string utf8_str;
+                    encode_utf8(unicode, utf8_str);
+                    str += utf8_str;
                 } else {
                     throw JsonInvalidEscapedSym(reader.get_curr_line(), reader.get_curr_col(), ch);
                 }
@@ -809,7 +823,125 @@ namespace simpleJson {
         node->set_value(str);
     }
 
-    void JsonParser::parseNumber(simpleJson::JsonReader &reader, simpleJson::JsonNodePtr &node) {}
+    void JsonParser::parseNumber(simpleJson::JsonReader &reader, simpleJson::JsonNodePtr &node) {
+        node->setValueType(JSON_TYPE_DOUBLE);
+        bool sign = 1;
+        double value = 0;
+        bool exp_sign = 1;
+        int exp_val = 0;
+        int scale = 0, sub_scale = 0;
+
+        char ch = reader.curr_char();
+        if (ch != '-' && !isdigit(ch)) {
+            throw JsonInvalidSym(reader.get_curr_line(), reader.get_curr_col(), ch);
+        }
+        if (ch == '-') {
+            sign = 0;
+            reader.get_char();
+            ch = reader.curr_char();
+        }
+        if (isdigit(ch) && ch != '0') {
+            while(isdigit(ch)) {
+                value = value * 10 + (ch - '0');
+                reader.get_char();
+                ch = reader.curr_char();
+            }
+        } else if (ch == '0') {
+            reader.get_char();
+            ch = reader.curr_char();
+        }
+        if (ch == '.') {
+            reader.get_char();
+            ch = reader.curr_char();
+            if (!isdigit(ch)) {
+                throw JsonInvalidSym(reader.get_curr_line(), reader.get_curr_col(), ch);
+            }
+            while(isdigit(ch)) {
+                sub_scale += 1;
+                value = value + double(ch-'0')*std::pow(0.1, double(sub_scale));
+                reader.get_char();
+                ch = reader.curr_char();
+            }
+        }
+
+        if (ch == 'e' || ch == 'E') {
+            reader.get_char();
+            ch = reader.curr_char();
+
+            if (ch == '-') {
+                exp_sign = 0;
+                reader.get_char();
+                ch = reader.curr_char();
+            } else if (ch == '+') {
+                reader.get_char();
+                ch = reader.curr_char();
+            }
+
+            if (!isdigit(ch)) {
+                throw JsonInvalidSym(reader.get_curr_line(), reader.get_curr_col(), ch);
+            }
+            while(isdigit(ch)) {
+                exp_val = exp_val * 10 + (ch - '0');
+                reader.get_char();
+                ch = reader.curr_char();
+            }
+
+            exp_val *= exp_sign ? 1 : -1;
+        }
+
+        value = (value * (sign ? 1 : -1)) * std::pow(10, exp_val);
+        node->set_value(value);
+    }
+
+
+    void JsonParser::to_json_string(std::string &_dst_str, bool _one_line) const {
+        _dst_str.clear();
+        root->to_json_string(_dst_str, false, 0, _one_line);
+    }
+
+    bool JsonParser::save_to_file(const std::string &_file_path, bool _one_line) const {
+        std::ofstream output_file_stream(_file_path);
+        if (!output_file_stream) {
+            throw FilePathNotValid(_file_path);
+        }
+        std::string json_str;
+        to_json_string(json_str, _one_line);
+        output_file_stream << json_str;
+        output_file_stream.close();
+        return true;
+    }
+
 
 /****************************************************************************************************************/
+
+    void encode_utf8(long _unicode, std::string& _out)
+    {
+        if (_unicode < 0 || _unicode > 0x10FFFF)
+            return;
+
+        _out.clear();
+        if (_unicode <= 0x7F)
+        {
+            _out += static_cast<char>(_unicode);
+        }
+        else if (_unicode >= 0x80 && _unicode <= 0x7FF)
+        {
+            _out += static_cast<char>((_unicode >> 6) | 0xC0);
+            _out += static_cast<char>((_unicode & 0x3F) | 0x80);
+        }
+        else if (_unicode >= 0x800 && _unicode <= 0xFFFF)
+        {
+            _out += static_cast<char>((_unicode >> 12) | 0xE0);
+            _out += static_cast<char>(((_unicode >> 6) & 0x3F) | 0x80);
+            _out += static_cast<char>((_unicode & 0x3F) | 0x80);
+        }
+        else if (_unicode >= 0x10000 && _unicode <= 0x10FFFF)
+        {
+            _out += static_cast<char>((_unicode >> 18) | 0xF0);
+            _out += static_cast<char>(((_unicode >> 12) & 0x3F) | 0x80);
+            _out += static_cast<char>(((_unicode >> 6) & 0x3F) | 0x80);
+            _out += static_cast<char>((_unicode & 0x3F) | 0x80);
+        }
+
+    }
 }