mirror of https://github.com/minetest/minetest.git
120 lines
2.7 KiB
C++
120 lines
2.7 KiB
C++
/*
|
|
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();
|
|
}
|
|
|
|
|