mirror of
https://github.com/moparisthebest/mailiverse
synced 2024-11-28 19:22:16 -05:00
534 lines
16 KiB
C++
Executable File
534 lines
16 KiB
C++
Executable File
/******************************************************************************
|
|
|
|
Copyright (c) 2009-2010, Terry Caton
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
* Neither the name of the projecct nor the names of its contributors
|
|
may be used to endorse or promote products derived from this software
|
|
without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
|
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
|
|
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
|
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
******************************************************************************/
|
|
|
|
#include <cassert>
|
|
#include <set>
|
|
#include <sstream>
|
|
|
|
/*
|
|
|
|
TODO:
|
|
* better documentation
|
|
* unicode character decoding
|
|
|
|
*/
|
|
|
|
namespace json
|
|
{
|
|
|
|
template<typename istream>
|
|
inline istream& operator >> (istream& istr, UnknownElement& elementRoot) {
|
|
Reader<istream>::Read(elementRoot, istr);
|
|
return istr;
|
|
}
|
|
|
|
//////////////////////
|
|
// Reader::InputStream
|
|
///////////////////
|
|
// Reader (finally)
|
|
|
|
|
|
template <typename istream>
|
|
template <typename ElementTypeT>
|
|
void Reader<istream>::Read_i(ElementTypeT& element, istream& istr)
|
|
{
|
|
Reader reader;
|
|
|
|
Tokens tokens;
|
|
InputStream inputStream(istr);
|
|
reader.Scan(tokens, inputStream);
|
|
|
|
TokenStream tokenStream(tokens);
|
|
reader.Parse(element, tokenStream);
|
|
|
|
if (tokenStream.EOS() == false)
|
|
{
|
|
const Token& token = tokenStream.Peek();
|
|
std::string sMessage = std::string("Expected End of token stream; found ") + token.sValue;
|
|
throw ParseException(sMessage, token.locBegin, token.locEnd);
|
|
}
|
|
}
|
|
|
|
template <typename istream>
|
|
inline void Reader<istream>::Scan(Tokens& tokens, InputStream& inputStream)
|
|
{
|
|
while (EatWhiteSpace(inputStream), // ignore any leading white space...
|
|
inputStream.EOS() == false) // ...before checking for EOS
|
|
{
|
|
// if all goes well, we'll create a token each pass
|
|
Token token;
|
|
token.locBegin = inputStream.GetLocation();
|
|
|
|
// gives us null-terminated string
|
|
char sChar = inputStream.Peek();
|
|
switch (sChar)
|
|
{
|
|
case '{':
|
|
token.sValue = MatchExpectedString(inputStream, "{");
|
|
token.nType = Token::TOKEN_OBJECT_BEGIN;
|
|
break;
|
|
|
|
case '}':
|
|
token.sValue = MatchExpectedString(inputStream, "}");
|
|
token.nType = Token::TOKEN_OBJECT_END;
|
|
break;
|
|
|
|
case '[':
|
|
token.sValue = MatchExpectedString(inputStream, "[");
|
|
token.nType = Token::TOKEN_ARRAY_BEGIN;
|
|
break;
|
|
|
|
case ']':
|
|
token.sValue = MatchExpectedString(inputStream, "]");
|
|
token.nType = Token::TOKEN_ARRAY_END;
|
|
break;
|
|
|
|
case ',':
|
|
token.sValue = MatchExpectedString(inputStream, ",");
|
|
token.nType = Token::TOKEN_NEXT_ELEMENT;
|
|
break;
|
|
|
|
case ':':
|
|
token.sValue = MatchExpectedString(inputStream, ":");
|
|
token.nType = Token::TOKEN_MEMBER_ASSIGN;
|
|
break;
|
|
|
|
case '"':
|
|
token.sValue = MatchString(inputStream);
|
|
token.nType = Token::TOKEN_STRING;
|
|
break;
|
|
|
|
case '-':
|
|
case '0':
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
case '8':
|
|
case '9':
|
|
token.nValue = MatchNumber(inputStream);
|
|
token.nType = Token::TOKEN_NUMBER;
|
|
break;
|
|
|
|
case 't':
|
|
token.sValue = MatchExpectedString(inputStream, "true");
|
|
token.nType = Token::TOKEN_BOOLEAN;
|
|
break;
|
|
|
|
case 'f':
|
|
token.sValue = MatchExpectedString(inputStream, "false");
|
|
token.nType = Token::TOKEN_BOOLEAN;
|
|
break;
|
|
|
|
case 'n':
|
|
token.sValue = MatchExpectedString(inputStream, "null");
|
|
token.nType = Token::TOKEN_NULL;
|
|
break;
|
|
|
|
default:
|
|
{
|
|
std::string sErrorMessage = std::string("Unexpected character in stream: ") + sChar;
|
|
throw ScanException(sErrorMessage, inputStream.GetLocation());
|
|
}
|
|
}
|
|
|
|
token.locEnd = inputStream.GetLocation();
|
|
tokens.push_back(token);
|
|
}
|
|
}
|
|
|
|
|
|
template <typename istream>
|
|
inline void Reader<istream>::EatWhiteSpace(InputStream& inputStream)
|
|
{
|
|
while (inputStream.EOS() == false &&
|
|
::isspace(inputStream.Peek()))
|
|
inputStream.Get();
|
|
}
|
|
|
|
template <typename istream>
|
|
inline const std::string &Reader<istream>::MatchExpectedString(InputStream& inputStream, const std::string& sExpected)
|
|
{
|
|
std::string::const_iterator it(sExpected.begin()),
|
|
itEnd(sExpected.end());
|
|
for ( ; it != itEnd; ++it) {
|
|
if (inputStream.EOS() || // did we reach the end before finding what we're looking for...
|
|
inputStream.Get() != *it) // ...or did we find something different?
|
|
{
|
|
std::string sMessage = std::string("Expected string: ") + sExpected;
|
|
throw ScanException(sMessage, inputStream.GetLocation());
|
|
}
|
|
}
|
|
|
|
// all's well if we made it here
|
|
return sExpected;
|
|
}
|
|
|
|
inline unsigned int decodeUnicodeCodePoint (InputStream& inputStream)
|
|
{
|
|
unsigned int v_[2];
|
|
unsigned int &unicode = v_[0];
|
|
unsigned int &surrogate = v_[1];
|
|
|
|
for (int n=0; n<2; n++)
|
|
{
|
|
unsigned int &v = v_[x];
|
|
v = 0;
|
|
|
|
for (int i=3; i>=0 && !inputStream.EOS(); --i)
|
|
{
|
|
char c = inputStream.Get();
|
|
unsigned int ord = 0;
|
|
if ('0' <= c && c <= '9')
|
|
ord = c - '0';
|
|
else
|
|
if ('A' <= c && c <= 'F')
|
|
ord = 10 + (c - 'A');
|
|
else
|
|
if ('a' <= c && c <= 'f')
|
|
ord = 10 + (c - 'a');
|
|
|
|
v |= ord << (4 * i);
|
|
}
|
|
|
|
bool hasSurrogate = false;
|
|
if (v >= 0xD800 && v <= 0xDBFF)
|
|
{
|
|
int pos = inputStream.TellG();
|
|
|
|
if (!inputStream.Get() != '\\' || !inputStream.Get() != 'u')
|
|
inputStream.SetG(pos);
|
|
else
|
|
hasSurrogate = true;
|
|
}
|
|
|
|
if (!hasSurrogate)
|
|
break;
|
|
}
|
|
|
|
if (n == 2)
|
|
unicode = 0x10000 + ((unicode & 0x3FF) << 10) + (surrogate & 0x3FF);
|
|
|
|
return unicode;
|
|
}
|
|
|
|
inline std::string codePointToUTF8(unsigned int cp)
|
|
{
|
|
std::string result;
|
|
|
|
// based on description from http://en.wikipedia.org/wiki/UTF-8
|
|
|
|
if (cp <= 0x7f)
|
|
{
|
|
result.resize(1);
|
|
result[0] = static_cast<char>(cp);
|
|
}
|
|
else if (cp <= 0x7FF)
|
|
{
|
|
result.resize(2);
|
|
result[1] = static_cast<char>(0x80 | (0x3f & cp));
|
|
result[0] = static_cast<char>(0xC0 | (0x1f & (cp >> 6)));
|
|
}
|
|
else if (cp <= 0xFFFF)
|
|
{
|
|
result.resize(3);
|
|
result[2] = static_cast<char>(0x80 | (0x3f & cp));
|
|
result[1] = 0x80 | static_cast<char>((0x3f & (cp >> 6)));
|
|
result[0] = 0xE0 | static_cast<char>((0xf & (cp >> 12)));
|
|
}
|
|
else if (cp <= 0x10FFFF)
|
|
{
|
|
result.resize(4);
|
|
result[3] = static_cast<char>(0x80 | (0x3f & cp));
|
|
result[2] = static_cast<char>(0x80 | (0x3f & (cp >> 6)));
|
|
result[1] = static_cast<char>(0x80 | (0x3f & (cp >> 12)));
|
|
result[0] = static_cast<char>(0xF0 | (0x7 & (cp >> 18)));
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
template <typename istream>
|
|
inline const std::string &Reader<istream>::MatchString(InputStream& inputStream)
|
|
{
|
|
MatchExpectedString(inputStream, "\"");
|
|
|
|
buffer.resize(0);
|
|
std::string &string = buffer;
|
|
|
|
while (inputStream.EOS() == false &&
|
|
inputStream.Peek() != '"')
|
|
{
|
|
char c = inputStream.Get();
|
|
|
|
// escape?
|
|
if (c == '\\' &&
|
|
inputStream.EOS() == false) // shouldn't have reached the end yet
|
|
{
|
|
c = inputStream.Get();
|
|
switch (c) {
|
|
case '/': string.push_back('/'); break;
|
|
case '"': string.push_back('"'); break;
|
|
case '\\': string.push_back('\\'); break;
|
|
case 'b': string.push_back('\b'); break;
|
|
case 'f': string.push_back('\f'); break;
|
|
case 'n': string.push_back('\n'); break;
|
|
case 'r': string.push_back('\r'); break;
|
|
case 't': string.push_back('\t'); break;
|
|
case 'u':
|
|
{
|
|
string += codePointToUTF8(decodeUnicodeCodePoint(inputStream));
|
|
}
|
|
break;
|
|
default: {
|
|
std::string sMessage = std::string("Unrecognized escape sequence found in string: \\") + c;
|
|
throw ScanException(sMessage, inputStream.GetLocation());
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
string.push_back(c);
|
|
}
|
|
}
|
|
|
|
// eat the last '"' that we just peeked
|
|
MatchExpectedString(inputStream, "\"");
|
|
|
|
// all's well if we made it here
|
|
return buffer;
|
|
}
|
|
|
|
|
|
template <typename istream>
|
|
inline Number::ValueType Reader<istream>::MatchNumber(InputStream& inputStream)
|
|
{
|
|
const int MAX_BUF=255;
|
|
char buffer[MAX_BUF+1];
|
|
char p = 0;
|
|
|
|
while (p<MAX_BUF && inputStream.EOS() == false &&
|
|
numericChars.find(inputStream.Peek()) != numericChars.end())
|
|
{
|
|
buffer[p++] = inputStream.Get();
|
|
}
|
|
buffer[p] = 0;
|
|
|
|
#ifdef JSON_USE_STRING_AS_NUMBER
|
|
return json::NumberString(buffer);
|
|
#else
|
|
int base=0;
|
|
char *end;
|
|
return strtol(buffer,&end, base);
|
|
#endif
|
|
}
|
|
|
|
template <typename istream>
|
|
inline void Reader<istream>::Parse(UnknownElement& element, Reader::TokenStream& tokenStream)
|
|
{
|
|
const Token& token = tokenStream.Peek();
|
|
switch (token.nType) {
|
|
case Token::TOKEN_OBJECT_BEGIN:
|
|
{
|
|
// implicit non-const cast will perform conversion for us (if necessary)
|
|
Object& object = element;
|
|
Parse(object, tokenStream);
|
|
break;
|
|
}
|
|
|
|
case Token::TOKEN_ARRAY_BEGIN:
|
|
{
|
|
Array& array = element;
|
|
Parse(array, tokenStream);
|
|
break;
|
|
}
|
|
|
|
case Token::TOKEN_STRING:
|
|
{
|
|
String& string = element;
|
|
Parse(string, tokenStream);
|
|
break;
|
|
}
|
|
|
|
case Token::TOKEN_NUMBER:
|
|
{
|
|
Number& number = element;
|
|
Parse(number, tokenStream);
|
|
break;
|
|
}
|
|
|
|
case Token::TOKEN_BOOLEAN:
|
|
{
|
|
Boolean& boolean = element;
|
|
Parse(boolean, tokenStream);
|
|
break;
|
|
}
|
|
|
|
case Token::TOKEN_NULL:
|
|
{
|
|
Null& null = element;
|
|
Parse(null, tokenStream);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
std::string sMessage = std::string("Unexpected token: ") + token.sValue;
|
|
throw ParseException(sMessage, token.locBegin, token.locEnd);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
template <typename istream>
|
|
inline void Reader<istream>::Parse(Object& object, Reader::TokenStream& tokenStream)
|
|
{
|
|
MatchExpectedToken(Token::TOKEN_OBJECT_BEGIN, tokenStream);
|
|
|
|
bool bContinue = (tokenStream.EOS() == false &&
|
|
tokenStream.Peek().nType != Token::TOKEN_OBJECT_END);
|
|
while (bContinue)
|
|
{
|
|
Object::Member member;
|
|
|
|
// first the member name. save the token in case we have to throw an exception
|
|
const Token& tokenName = tokenStream.Peek();
|
|
member.name = MatchExpectedToken(Token::TOKEN_STRING, tokenStream);
|
|
|
|
// ...then the key/value separator...
|
|
MatchExpectedToken(Token::TOKEN_MEMBER_ASSIGN, tokenStream);
|
|
|
|
// ...then the value itself (can be anything).
|
|
Parse(member.element, tokenStream);
|
|
|
|
// try adding it to the object (this could throw)
|
|
try
|
|
{
|
|
object.Insert(member);
|
|
}
|
|
catch (Exception&)
|
|
{
|
|
// must be a duplicate name
|
|
std::string sMessage = std::string("Duplicate object member token: ") + member.name;
|
|
throw ParseException(sMessage, tokenName.locBegin, tokenName.locEnd);
|
|
}
|
|
|
|
bContinue = (tokenStream.EOS() == false &&
|
|
tokenStream.Peek().nType == Token::TOKEN_NEXT_ELEMENT);
|
|
if (bContinue)
|
|
MatchExpectedToken(Token::TOKEN_NEXT_ELEMENT, tokenStream);
|
|
}
|
|
|
|
MatchExpectedToken(Token::TOKEN_OBJECT_END, tokenStream);
|
|
}
|
|
|
|
template <typename istream>
|
|
inline void Reader<istream>::Parse(Array& array, Reader::TokenStream& tokenStream)
|
|
{
|
|
MatchExpectedToken(Token::TOKEN_ARRAY_BEGIN, tokenStream);
|
|
|
|
bool bContinue = (tokenStream.EOS() == false &&
|
|
tokenStream.Peek().nType != Token::TOKEN_ARRAY_END);
|
|
while (bContinue)
|
|
{
|
|
// ...what's next? could be anything
|
|
Array::iterator itElement = array.Insert(UnknownElement());
|
|
UnknownElement& element = *itElement;
|
|
Parse(element, tokenStream);
|
|
|
|
bContinue = (tokenStream.EOS() == false &&
|
|
tokenStream.Peek().nType == Token::TOKEN_NEXT_ELEMENT);
|
|
if (bContinue)
|
|
MatchExpectedToken(Token::TOKEN_NEXT_ELEMENT, tokenStream);
|
|
}
|
|
|
|
MatchExpectedToken(Token::TOKEN_ARRAY_END, tokenStream);
|
|
}
|
|
|
|
template <typename istream>
|
|
inline void Reader<istream>::Parse(String& string, Reader::TokenStream& tokenStream)
|
|
{
|
|
string = MatchExpectedToken(Token::TOKEN_STRING, tokenStream);
|
|
}
|
|
|
|
|
|
template <typename istream>
|
|
inline void Reader<istream>::Parse(Number& number, Reader::TokenStream& tokenStream)
|
|
{
|
|
/*
|
|
#ifdef JSON_USE_STRING_AS_NUMBER
|
|
const std::string& sValue = MatchExpectedToken(Token::TOKEN_NUMBER, tokenStream);
|
|
|
|
// std::istringstream iStr(sValue);
|
|
Number::ValueType dValue;
|
|
// iStr >> dValue;
|
|
|
|
int base=0;
|
|
char *end;
|
|
const char *s = sValue.c_str();
|
|
dValue = strtol(s, &end, base);
|
|
|
|
// did we consume all characters in the token?
|
|
if (*end != '\0')
|
|
// if (iStr.eof() == false)
|
|
{
|
|
// char c = iStr.peek();
|
|
char c = *end;
|
|
std::string sMessage = std::string("Unexpected character in NUMBER token: ") + c;
|
|
throw ParseException(sMessage, currentToken.locBegin, currentToken.locEnd);
|
|
}
|
|
|
|
number = dValue;
|
|
#else
|
|
*/
|
|
const Token& currentToken = tokenStream.Get(); // might need this later for throwing exception
|
|
number = currentToken.nValue;
|
|
//#endif
|
|
}
|
|
|
|
|
|
template <typename istream>
|
|
inline void Reader<istream>::Parse(Boolean& boolean, Reader::TokenStream& tokenStream)
|
|
{
|
|
const std::string& sValue = MatchExpectedToken(Token::TOKEN_BOOLEAN, tokenStream);
|
|
boolean = (sValue == "true" ? true : false);
|
|
}
|
|
|
|
|
|
template <typename istream>
|
|
inline void Reader<istream>::Parse(Null&, Reader::TokenStream& tokenStream)
|
|
{
|
|
MatchExpectedToken(Token::TOKEN_NULL, tokenStream);
|
|
}
|
|
|
|
|
|
} // End namespace
|