/* Minetest-c55 Copyright (C) 2010-2012 celeron55, Perttu Ahola <celeron55@gmail.com> This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This program 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "serialize.h" #include <sstream> #include <iomanip> // Creates a string encoded in JSON format (almost equivalent to a C string literal) std::string serializeJsonString(const std::string &plain) { std::ostringstream os(std::ios::binary); os<<"\""; for(size_t i = 0; i < plain.size(); i++) { char c = plain[i]; switch(c) { case '"': os<<"\\\""; break; case '\\': os<<"\\\\"; break; case '/': os<<"\\/"; break; case '\b': os<<"\\b"; break; case '\f': os<<"\\f"; break; case '\n': os<<"\\n"; break; case '\r': os<<"\\r"; break; case '\t': os<<"\\t"; break; default: { if(c >= 32 && c <= 126) { os<<c; } else { u32 cnum = (u32) (u8) c; os<<"\\u"<<std::hex<<std::setw(4)<<std::setfill('0')<<cnum; } break; } } } os<<"\""; return os.str(); } // Reads a string encoded in JSON format std::string deSerializeJsonString(std::istream &is) { std::ostringstream os(std::ios::binary); char c, c2; // Parse initial doublequote is >> c; if(c != '"') throw SerializationError("JSON string must start with doublequote"); // Parse characters for(;;) { c = is.get(); if(is.eof()) throw SerializationError("JSON string ended prematurely"); if(c == '"') { return os.str(); } else if(c == '\\') { c2 = is.get(); if(is.eof()) throw SerializationError("JSON string ended prematurely"); switch(c2) { default: os<<c2; break; case 'b': os<<'\b'; break; case 'f': os<<'\f'; break; case 'n': os<<'\n'; break; case 'r': os<<'\r'; break; case 't': os<<'\t'; break; case 'u': { char hexdigits[4+1]; is.read(hexdigits, 4); if(is.eof()) throw SerializationError("JSON string ended prematurely"); hexdigits[4] = 0; std::istringstream tmp_is(hexdigits, std::ios::binary); int hexnumber; tmp_is >> std::hex >> hexnumber; os<<((char)hexnumber); break; } } } else { os<<c; } } return os.str(); }