开源中国 2018 年度最后一场技术盛会邀你来约~错过就要等明年啦!点此立即预约

RonxBulld / ftrpcC++GPL-3.0

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这是一个简单的异步RPC框架,基于JSON进行传输。程序只进行打/解包参数工作,不涉及具体通信方式,socket、websocket都可以使用。目前作者使用此项目生成 typescript 前端和 C++ 后端,更多语言将被支持。 展开 收起

https://gitee.com/RonxBulld/ftrpc/wikis

  • C 81.1%
  • C++ 17.7%
  • JavaScript 0.7%
  • TypeScript 0.3%
  • CMake 0.1%
  • Other 0.1%
jsoncpp.cpp 161.40 KB
一键复制 编辑 Web IDE 原始数据 按行查看 历史
RonxBulld 提交于 2018-05-08 01:13 . 6项优化 3项修正 3项新增
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/// Json-cpp amalgamated source (http://jsoncpp.sourceforge.net/).
/// It is intended to be used with #include "json/json.h"
// //////////////////////////////////////////////////////////////////////
// Beginning of content of file: LICENSE
// //////////////////////////////////////////////////////////////////////
/*
The JsonCpp library's source code, including accompanying documentation,
tests and demonstration applications, are licensed under the following
conditions...
Baptiste Lepilleur and The JsonCpp Authors explicitly disclaim copyright in all
jurisdictions which recognize such a disclaimer. In such jurisdictions,
this software is released into the Public Domain.
In jurisdictions which do not recognize Public Domain property (e.g. Germany as of
2010), this software is Copyright (c) 2007-2010 by Baptiste Lepilleur and
The JsonCpp Authors, and is released under the terms of the MIT License (see below).
In jurisdictions which recognize Public Domain property, the user of this
software may choose to accept it either as 1) Public Domain, 2) under the
conditions of the MIT License (see below), or 3) under the terms of dual
Public Domain/MIT License conditions described here, as they choose.
The MIT License is about as close to Public Domain as a license can get, and is
described in clear, concise terms at:
http://en.wikipedia.org/wiki/MIT_License
The full text of the MIT License follows:
========================================================================
Copyright (c) 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use, copy,
modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
========================================================================
(END LICENSE TEXT)
The MIT license is compatible with both the GPL and commercial
software, affording one all of the rights of Public Domain with the
minor nuisance of being required to keep the above copyright notice
and license text in the source code. Note also that by accepting the
Public Domain "license" you can re-license your copy using whatever
license you like.
*/
// //////////////////////////////////////////////////////////////////////
// End of content of file: LICENSE
// //////////////////////////////////////////////////////////////////////
#include "json/json.h"
#ifndef JSON_IS_AMALGAMATION
#error "Compile with -I PATH_TO_JSON_DIRECTORY"
#endif
// //////////////////////////////////////////////////////////////////////
// Beginning of content of file: src/lib_json/json_tool.h
// //////////////////////////////////////////////////////////////////////
// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
// Distributed under MIT license, or public domain if desired and
// recognized in your jurisdiction.
// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
#ifndef LIB_JSONCPP_JSON_TOOL_H_INCLUDED
#define LIB_JSONCPP_JSON_TOOL_H_INCLUDED
// Also support old flag NO_LOCALE_SUPPORT
#ifdef NO_LOCALE_SUPPORT
#define JSONCPP_NO_LOCALE_SUPPORT
#endif
#ifndef JSONCPP_NO_LOCALE_SUPPORT
#include <clocale>
#endif
/* This header provides common string manipulation support, such as UTF-8,
* portable conversion from/to string...
*
* It is an internal header that must not be exposed.
*/
namespace Json {
static char getDecimalPoint() {
#ifdef JSONCPP_NO_LOCALE_SUPPORT
return '\0';
#else
struct lconv* lc = localeconv();
return lc ? *(lc->decimal_point) : '\0';
#endif
}
/// Converts a unicode code-point to UTF-8.
static inline JSONCPP_STRING codePointToUTF8(unsigned int cp) {
JSONCPP_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] = static_cast<char>(0x80 | (0x3f & (cp >> 6)));
result[0] = static_cast<char>(0xE0 | (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;
}
enum {
/// Constant that specify the size of the buffer that must be passed to
/// uintToString.
uintToStringBufferSize = 3 * sizeof(LargestUInt) + 1
};
// Defines a char buffer for use with uintToString().
typedef char UIntToStringBuffer[uintToStringBufferSize];
/** Converts an unsigned integer to string.
* @param value Unsigned integer to convert to string
* @param current Input/Output string buffer.
* Must have at least uintToStringBufferSize chars free.
*/
static inline void uintToString(LargestUInt value, char*& current) {
*--current = 0;
do {
*--current = static_cast<char>(value % 10U + static_cast<unsigned>('0'));
value /= 10;
} while (value != 0);
}
/** Change ',' to '.' everywhere in buffer.
*
* We had a sophisticated way, but it did not work in WinCE.
* @see https://github.com/open-source-parsers/jsoncpp/pull/9
*/
static inline void fixNumericLocale(char* begin, char* end) {
while (begin < end) {
if (*begin == ',') {
*begin = '.';
}
++begin;
}
}
static inline void fixNumericLocaleInput(char* begin, char* end) {
char decimalPoint = getDecimalPoint();
if (decimalPoint != '\0' && decimalPoint != '.') {
while (begin < end) {
if (*begin == '.') {
*begin = decimalPoint;
}
++begin;
}
}
}
/**
* Delete zeros in the end of string, if it isn't last zero before '.' character.
*/
static inline void fixZerosInTheEnd(char* begin, char* end) {
end--;
while ((begin < end) && (*end == '0')) {
// don't delete last zero before point.
if (*(end - 1) != '.') {
*end = '\0';
}
end--;
}
}
} // namespace Json {
#endif // LIB_JSONCPP_JSON_TOOL_H_INCLUDED
// //////////////////////////////////////////////////////////////////////
// End of content of file: src/lib_json/json_tool.h
// //////////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////////
// Beginning of content of file: src/lib_json/json_reader.cpp
// //////////////////////////////////////////////////////////////////////
// Copyright 2007-2011 Baptiste Lepilleur and The JsonCpp Authors
// Copyright (C) 2016 InfoTeCS JSC. All rights reserved.
// Distributed under MIT license, or public domain if desired and
// recognized in your jurisdiction.
// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
#if !defined(JSON_IS_AMALGAMATION)
#include <json/assertions.h>
#include <json/reader.h>
#include <json/value.h>
#include "json_tool.h"
#endif // if !defined(JSON_IS_AMALGAMATION)
#include <utility>
#include <cstdio>
#include <cassert>
#include <cstring>
#include <istream>
#include <sstream>
#include <memory>
#include <set>
#include <limits>
#if defined(_MSC_VER)
#if !defined(WINCE) && defined(__STDC_SECURE_LIB__) && _MSC_VER >= 1500 // VC++ 9.0 and above
#define snprintf sprintf_s
#elif _MSC_VER >= 1900 // VC++ 14.0 and above
#define snprintf std::snprintf
#else
#define snprintf _snprintf
#endif
#elif defined(__ANDROID__) || defined(__QNXNTO__)
#define snprintf snprintf
#elif __cplusplus >= 201103L
#if !defined(__MINGW32__) && !defined(__CYGWIN__)
#define snprintf std::snprintf
#endif
#endif
#if defined(__QNXNTO__)
#define sscanf std::sscanf
#endif
#if defined(_MSC_VER) && _MSC_VER >= 1400 // VC++ 8.0
// Disable warning about strdup being deprecated.
#pragma warning(disable : 4996)
#endif
// Define JSONCPP_DEPRECATED_STACK_LIMIT as an appropriate integer at compile time to change the stack limit
#if !defined(JSONCPP_DEPRECATED_STACK_LIMIT)
#define JSONCPP_DEPRECATED_STACK_LIMIT 1000
#endif
static size_t const stackLimit_g = JSONCPP_DEPRECATED_STACK_LIMIT; // see readValue()
namespace Json {
#if __cplusplus >= 201103L || (defined(_CPPLIB_VER) && _CPPLIB_VER >= 520)
typedef std::unique_ptr<CharReader> CharReaderPtr;
#else
typedef std::auto_ptr<CharReader> CharReaderPtr;
#endif
// Implementation of class Features
// ////////////////////////////////
Features::Features()
: allowComments_(true), strictRoot_(false),
allowDroppedNullPlaceholders_(false), allowNumericKeys_(false) {}
Features Features::all() { return Features(); }
Features Features::strictMode() {
Features features;
features.allowComments_ = false;
features.strictRoot_ = true;
features.allowDroppedNullPlaceholders_ = false;
features.allowNumericKeys_ = false;
return features;
}
// Implementation of class Reader
// ////////////////////////////////
bool Reader::containsNewLine(Reader::Location begin, Reader::Location end) {
for (; begin < end; ++begin)
if (*begin == '\n' || *begin == '\r')
return true;
return false;
}
// Class Reader
// //////////////////////////////////////////////////////////////////
Reader::Reader()
: errors_(), document_(), begin_(), end_(), current_(), lastValueEnd_(),
lastValue_(), commentsBefore_(), features_(Features::all()),
collectComments_() {}
Reader::Reader(const Features& features)
: errors_(), document_(), begin_(), end_(), current_(), lastValueEnd_(),
lastValue_(), commentsBefore_(), features_(features), collectComments_() {
}
bool
Reader::parse(const std::string& document, Value& root, bool collectComments) {
document_.assign(document.begin(), document.end());
const char* begin = document_.c_str();
const char* end = begin + document_.length();
return parse(begin, end, root, collectComments);
}
bool Reader::parse(std::istream& sin, Value& root, bool collectComments) {
// std::istream_iterator<char> begin(sin);
// std::istream_iterator<char> end;
// Those would allow streamed input from a file, if parse() were a
// template function.
// Since JSONCPP_STRING is reference-counted, this at least does not
// create an extra copy.
JSONCPP_STRING doc;
std::getline(sin, doc, (char)EOF);
return parse(doc.data(), doc.data() + doc.size(), root, collectComments);
}
bool Reader::parse(const char* beginDoc,
const char* endDoc,
Value& root,
bool collectComments) {
if (!features_.allowComments_) {
collectComments = false;
}
begin_ = beginDoc;
end_ = endDoc;
collectComments_ = collectComments;
current_ = begin_;
lastValueEnd_ = 0;
lastValue_ = 0;
commentsBefore_.clear();
errors_.clear();
while (!nodes_.empty())
nodes_.pop();
nodes_.push(&root);
bool successful = readValue();
Token token;
skipCommentTokens(token);
if (collectComments_ && !commentsBefore_.empty())
root.setComment(commentsBefore_, commentAfter);
if (features_.strictRoot_) {
if (!root.isArray() && !root.isObject()) {
// Set error location to start of doc, ideally should be first token found
// in doc
token.type_ = tokenError;
token.start_ = beginDoc;
token.end_ = endDoc;
addError(
"A valid JSON document must be either an array or an object value.",
token);
return false;
}
}
return successful;
}
bool Reader::readValue() {
// readValue() may call itself only if it calls readObject() or ReadArray().
// These methods execute nodes_.push() just before and nodes_.pop)() just after calling readValue().
// parse() executes one nodes_.push(), so > instead of >=.
if (nodes_.size() > stackLimit_g) throwRuntimeError("Exceeded stackLimit in readValue().");
Token token;
skipCommentTokens(token);
bool successful = true;
if (collectComments_ && !commentsBefore_.empty()) {
currentValue().setComment(commentsBefore_, commentBefore);
commentsBefore_.clear();
}
switch (token.type_) {
case tokenObjectBegin:
successful = readObject(token);
currentValue().setOffsetLimit(current_ - begin_);
break;
case tokenArrayBegin:
successful = readArray(token);
currentValue().setOffsetLimit(current_ - begin_);
break;
case tokenNumber:
successful = decodeNumber(token);
break;
case tokenString:
successful = decodeString(token);
break;
case tokenTrue:
{
Value v(true);
currentValue().swapPayload(v);
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
}
break;
case tokenFalse:
{
Value v(false);
currentValue().swapPayload(v);
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
}
break;
case tokenNull:
{
Value v;
currentValue().swapPayload(v);
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
}
break;
case tokenArraySeparator:
case tokenObjectEnd:
case tokenArrayEnd:
if (features_.allowDroppedNullPlaceholders_) {
// "Un-read" the current token and mark the current value as a null
// token.
current_--;
Value v;
currentValue().swapPayload(v);
currentValue().setOffsetStart(current_ - begin_ - 1);
currentValue().setOffsetLimit(current_ - begin_);
break;
} // Else, fall through...
default:
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
return addError("Syntax error: value, object or array expected.", token);
}
if (collectComments_) {
lastValueEnd_ = current_;
lastValue_ = &currentValue();
}
return successful;
}
void Reader::skipCommentTokens(Token& token) {
if (features_.allowComments_) {
do {
readToken(token);
} while (token.type_ == tokenComment);
} else {
readToken(token);
}
}
bool Reader::readToken(Token& token) {
skipSpaces();
token.start_ = current_;
Char c = getNextChar();
bool ok = true;
switch (c) {
case '{':
token.type_ = tokenObjectBegin;
break;
case '}':
token.type_ = tokenObjectEnd;
break;
case '[':
token.type_ = tokenArrayBegin;
break;
case ']':
token.type_ = tokenArrayEnd;
break;
case '"':
token.type_ = tokenString;
ok = readString();
break;
case '/':
token.type_ = tokenComment;
ok = readComment();
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '-':
token.type_ = tokenNumber;
readNumber();
break;
case 't':
token.type_ = tokenTrue;
ok = match("rue", 3);
break;
case 'f':
token.type_ = tokenFalse;
ok = match("alse", 4);
break;
case 'n':
token.type_ = tokenNull;
ok = match("ull", 3);
break;
case ',':
token.type_ = tokenArraySeparator;
break;
case ':':
token.type_ = tokenMemberSeparator;
break;
case 0:
token.type_ = tokenEndOfStream;
break;
default:
ok = false;
break;
}
if (!ok)
token.type_ = tokenError;
token.end_ = current_;
return true;
}
void Reader::skipSpaces() {
while (current_ != end_) {
Char c = *current_;
if (c == ' ' || c == '\t' || c == '\r' || c == '\n')
++current_;
else
break;
}
}
bool Reader::match(Location pattern, int patternLength) {
if (end_ - current_ < patternLength)
return false;
int index = patternLength;
while (index--)
if (current_[index] != pattern[index])
return false;
current_ += patternLength;
return true;
}
bool Reader::readComment() {
Location commentBegin = current_ - 1;
Char c = getNextChar();
bool successful = false;
if (c == '*')
successful = readCStyleComment();
else if (c == '/')
successful = readCppStyleComment();
if (!successful)
return false;
if (collectComments_) {
CommentPlacement placement = commentBefore;
if (lastValueEnd_ && !containsNewLine(lastValueEnd_, commentBegin)) {
if (c != '*' || !containsNewLine(commentBegin, current_))
placement = commentAfterOnSameLine;
}
addComment(commentBegin, current_, placement);
}
return true;
}
JSONCPP_STRING Reader::normalizeEOL(Reader::Location begin, Reader::Location end) {
JSONCPP_STRING normalized;
normalized.reserve(static_cast<size_t>(end - begin));
Reader::Location current = begin;
while (current != end) {
char c = *current++;
if (c == '\r') {
if (current != end && *current == '\n')
// convert dos EOL
++current;
// convert Mac EOL
normalized += '\n';
} else {
normalized += c;
}
}
return normalized;
}
void
Reader::addComment(Location begin, Location end, CommentPlacement placement) {
assert(collectComments_);
const JSONCPP_STRING& normalized = normalizeEOL(begin, end);
if (placement == commentAfterOnSameLine) {
assert(lastValue_ != 0);
lastValue_->setComment(normalized, placement);
} else {
commentsBefore_ += normalized;
}
}
bool Reader::readCStyleComment() {
while ((current_ + 1) < end_) {
Char c = getNextChar();
if (c == '*' && *current_ == '/')
break;
}
return getNextChar() == '/';
}
bool Reader::readCppStyleComment() {
while (current_ != end_) {
Char c = getNextChar();
if (c == '\n')
break;
if (c == '\r') {
// Consume DOS EOL. It will be normalized in addComment.
if (current_ != end_ && *current_ == '\n')
getNextChar();
// Break on Moc OS 9 EOL.
break;
}
}
return true;
}
void Reader::readNumber() {
const char *p = current_;
char c = '0'; // stopgap for already consumed character
// integral part
while (c >= '0' && c <= '9')
c = (current_ = p) < end_ ? *p++ : '\0';
// fractional part
if (c == '.') {
c = (current_ = p) < end_ ? *p++ : '\0';
while (c >= '0' && c <= '9')
c = (current_ = p) < end_ ? *p++ : '\0';
}
// exponential part
if (c == 'e' || c == 'E') {
c = (current_ = p) < end_ ? *p++ : '\0';
if (c == '+' || c == '-')
c = (current_ = p) < end_ ? *p++ : '\0';
while (c >= '0' && c <= '9')
c = (current_ = p) < end_ ? *p++ : '\0';
}
}
bool Reader::readString() {
Char c = '\0';
while (current_ != end_) {
c = getNextChar();
if (c == '\\')
getNextChar();
else if (c == '"')
break;
}
return c == '"';
}
bool Reader::readObject(Token& tokenStart) {
Token tokenName;
JSONCPP_STRING name;
Value init(objectValue);
currentValue().swapPayload(init);
currentValue().setOffsetStart(tokenStart.start_ - begin_);
while (readToken(tokenName)) {
bool initialTokenOk = true;
while (tokenName.type_ == tokenComment && initialTokenOk)
initialTokenOk = readToken(tokenName);
if (!initialTokenOk)
break;
if (tokenName.type_ == tokenObjectEnd && name.empty()) // empty object
return true;
name.clear();
if (tokenName.type_ == tokenString) {
if (!decodeString(tokenName, name))
return recoverFromError(tokenObjectEnd);
} else if (tokenName.type_ == tokenNumber && features_.allowNumericKeys_) {
Value numberName;
if (!decodeNumber(tokenName, numberName))
return recoverFromError(tokenObjectEnd);
name = JSONCPP_STRING(numberName.asCString());
} else {
break;
}
Token colon;
if (!readToken(colon) || colon.type_ != tokenMemberSeparator) {
return addErrorAndRecover(
"Missing ':' after object member name", colon, tokenObjectEnd);
}
Value& value = currentValue()[name];
nodes_.push(&value);
bool ok = readValue();
nodes_.pop();
if (!ok) // error already set
return recoverFromError(tokenObjectEnd);
Token comma;
if (!readToken(comma) ||
(comma.type_ != tokenObjectEnd && comma.type_ != tokenArraySeparator &&
comma.type_ != tokenComment)) {
return addErrorAndRecover(
"Missing ',' or '}' in object declaration", comma, tokenObjectEnd);
}
bool finalizeTokenOk = true;
while (comma.type_ == tokenComment && finalizeTokenOk)
finalizeTokenOk = readToken(comma);
if (comma.type_ == tokenObjectEnd)
return true;
}
return addErrorAndRecover(
"Missing '}' or object member name", tokenName, tokenObjectEnd);
}
bool Reader::readArray(Token& tokenStart) {
Value init(arrayValue);
currentValue().swapPayload(init);
currentValue().setOffsetStart(tokenStart.start_ - begin_);
skipSpaces();
if (current_ != end_ && *current_ == ']') // empty array
{
Token endArray;
readToken(endArray);
return true;
}
int index = 0;
for (;;) {
Value& value = currentValue()[index++];
nodes_.push(&value);
bool ok = readValue();
nodes_.pop();
if (!ok) // error already set
return recoverFromError(tokenArrayEnd);
Token token;
// Accept Comment after last item in the array.
ok = readToken(token);
while (token.type_ == tokenComment && ok) {
ok = readToken(token);
}
bool badTokenType =
(token.type_ != tokenArraySeparator && token.type_ != tokenArrayEnd);
if (!ok || badTokenType) {
return addErrorAndRecover(
"Missing ',' or ']' in array declaration", token, tokenArrayEnd);
}
if (token.type_ == tokenArrayEnd)
break;
}
return true;
}
bool Reader::decodeNumber(Token& token) {
Value decoded;
if (!decodeNumber(token, decoded))
return false;
currentValue().swapPayload(decoded);
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
return true;
}
bool Reader::decodeNumber(Token& token, Value& decoded) {
// Attempts to parse the number as an integer. If the number is
// larger than the maximum supported value of an integer then
// we decode the number as a double.
Location current = token.start_;
bool isNegative = *current == '-';
if (isNegative)
++current;
// TODO: Help the compiler do the div and mod at compile time or get rid of them.
Value::LargestUInt maxIntegerValue =
isNegative ? Value::LargestUInt(Value::maxLargestInt) + 1
: Value::maxLargestUInt;
Value::LargestUInt threshold = maxIntegerValue / 10;
Value::LargestUInt value = 0;
while (current < token.end_) {
Char c = *current++;
if (c < '0' || c > '9')
return decodeDouble(token, decoded);
Value::UInt digit(static_cast<Value::UInt>(c - '0'));
if (value >= threshold) {
// We've hit or exceeded the max value divided by 10 (rounded down). If
// a) we've only just touched the limit, b) this is the last digit, and
// c) it's small enough to fit in that rounding delta, we're okay.
// Otherwise treat this number as a double to avoid overflow.
if (value > threshold || current != token.end_ ||
digit > maxIntegerValue % 10) {
return decodeDouble(token, decoded);
}
}
value = value * 10 + digit;
}
if (isNegative && value == maxIntegerValue)
decoded = Value::minLargestInt;
else if (isNegative)
decoded = -Value::LargestInt(value);
else if (value <= Value::LargestUInt(Value::maxInt))
decoded = Value::LargestInt(value);
else
decoded = value;
return true;
}
bool Reader::decodeDouble(Token& token) {
Value decoded;
if (!decodeDouble(token, decoded))
return false;
currentValue().swapPayload(decoded);
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
return true;
}
bool Reader::decodeDouble(Token& token, Value& decoded) {
double value = 0;
JSONCPP_STRING buffer(token.start_, token.end_);
JSONCPP_ISTRINGSTREAM is(buffer);
if (!(is >> value))
return addError("'" + JSONCPP_STRING(token.start_, token.end_) +
"' is not a number.",
token);
decoded = value;
return true;
}
bool Reader::decodeString(Token& token) {
JSONCPP_STRING decoded_string;
if (!decodeString(token, decoded_string))
return false;
Value decoded(decoded_string);
currentValue().swapPayload(decoded);
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
return true;
}
bool Reader::decodeString(Token& token, JSONCPP_STRING& decoded) {
decoded.reserve(static_cast<size_t>(token.end_ - token.start_ - 2));
Location current = token.start_ + 1; // skip '"'
Location end = token.end_ - 1; // do not include '"'
while (current != end) {
Char c = *current++;
if (c == '"')
break;
else if (c == '\\') {
if (current == end)
return addError("Empty escape sequence in string", token, current);
Char escape = *current++;
switch (escape) {
case '"':
decoded += '"';
break;
case '/':
decoded += '/';
break;
case '\\':
decoded += '\\';
break;
case 'b':
decoded += '\b';
break;
case 'f':
decoded += '\f';
break;
case 'n':
decoded += '\n';
break;
case 'r':
decoded += '\r';
break;
case 't':
decoded += '\t';
break;
case 'u': {
unsigned int unicode;
if (!decodeUnicodeCodePoint(token, current, end, unicode))
return false;
decoded += codePointToUTF8(unicode);
} break;
default:
return addError("Bad escape sequence in string", token, current);
}
} else {
decoded += c;
}
}
return true;
}
bool Reader::decodeUnicodeCodePoint(Token& token,
Location& current,
Location end,
unsigned int& unicode) {
if (!decodeUnicodeEscapeSequence(token, current, end, unicode))
return false;
if (unicode >= 0xD800 && unicode <= 0xDBFF) {
// surrogate pairs
if (end - current < 6)
return addError(
"additional six characters expected to parse unicode surrogate pair.",
token,
current);
unsigned int surrogatePair;
if (*(current++) == '\\' && *(current++) == 'u') {
if (decodeUnicodeEscapeSequence(token, current, end, surrogatePair)) {
unicode = 0x10000 + ((unicode & 0x3FF) << 10) + (surrogatePair & 0x3FF);
} else
return false;
} else
return addError("expecting another \\u token to begin the second half of "
"a unicode surrogate pair",
token,
current);
}
return true;
}
bool Reader::decodeUnicodeEscapeSequence(Token& token,
Location& current,
Location end,
unsigned int& ret_unicode) {
if (end - current < 4)
return addError(
"Bad unicode escape sequence in string: four digits expected.",
token,
current);
int unicode = 0;
for (int index = 0; index < 4; ++index) {
Char c = *current++;
unicode *= 16;
if (c >= '0' && c <= '9')
unicode += c - '0';
else if (c >= 'a' && c <= 'f')
unicode += c - 'a' + 10;
else if (c >= 'A' && c <= 'F')
unicode += c - 'A' + 10;
else
return addError(
"Bad unicode escape sequence in string: hexadecimal digit expected.",
token,
current);
}
ret_unicode = static_cast<unsigned int>(unicode);
return true;
}
bool
Reader::addError(const JSONCPP_STRING& message, Token& token, Location extra) {
ErrorInfo info;
info.token_ = token;
info.message_ = message;
info.extra_ = extra;
errors_.push_back(info);
return false;
}
bool Reader::recoverFromError(TokenType skipUntilToken) {
size_t const errorCount = errors_.size();
Token skip;
for (;;) {
if (!readToken(skip))
errors_.resize(errorCount); // discard errors caused by recovery
if (skip.type_ == skipUntilToken || skip.type_ == tokenEndOfStream)
break;
}
errors_.resize(errorCount);
return false;
}
bool Reader::addErrorAndRecover(const JSONCPP_STRING& message,
Token& token,
TokenType skipUntilToken) {
addError(message, token);
return recoverFromError(skipUntilToken);
}
Value& Reader::currentValue() { return *(nodes_.top()); }
Reader::Char Reader::getNextChar() {
if (current_ == end_)
return 0;
return *current_++;
}
void Reader::getLocationLineAndColumn(Location location,
int& line,
int& column) const {
Location current = begin_;
Location lastLineStart = current;
line = 0;
while (current < location && current != end_) {
Char c = *current++;
if (c == '\r') {
if (*current == '\n')
++current;
lastLineStart = current;
++line;
} else if (c == '\n') {
lastLineStart = current;
++line;
}
}
// column & line start at 1
column = int(location - lastLineStart) + 1;
++line;
}
JSONCPP_STRING Reader::getLocationLineAndColumn(Location location) const {
int line, column;
getLocationLineAndColumn(location, line, column);
char buffer[18 + 16 + 16 + 1];
snprintf(buffer, sizeof(buffer), "Line %d, Column %d", line, column);
return buffer;
}
// Deprecated. Preserved for backward compatibility
JSONCPP_STRING Reader::getFormatedErrorMessages() const {
return getFormattedErrorMessages();
}
JSONCPP_STRING Reader::getFormattedErrorMessages() const {
JSONCPP_STRING formattedMessage;
for (Errors::const_iterator itError = errors_.begin();
itError != errors_.end();
++itError) {
const ErrorInfo& error = *itError;
formattedMessage +=
"* " + getLocationLineAndColumn(error.token_.start_) + "\n";
formattedMessage += " " + error.message_ + "\n";
if (error.extra_)
formattedMessage +=
"See " + getLocationLineAndColumn(error.extra_) + " for detail.\n";
}
return formattedMessage;
}
std::vector<Reader::StructuredError> Reader::getStructuredErrors() const {
std::vector<Reader::StructuredError> allErrors;
for (Errors::const_iterator itError = errors_.begin();
itError != errors_.end();
++itError) {
const ErrorInfo& error = *itError;
Reader::StructuredError structured;
structured.offset_start = error.token_.start_ - begin_;
structured.offset_limit = error.token_.end_ - begin_;
structured.message = error.message_;
allErrors.push_back(structured);
}
return allErrors;
}
bool Reader::pushError(const Value& value, const JSONCPP_STRING& message) {
ptrdiff_t const length = end_ - begin_;
if(value.getOffsetStart() > length
|| value.getOffsetLimit() > length)
return false;
Token token;
token.type_ = tokenError;
token.start_ = begin_ + value.getOffsetStart();
token.end_ = end_ + value.getOffsetLimit();
ErrorInfo info;
info.token_ = token;
info.message_ = message;
info.extra_ = 0;
errors_.push_back(info);
return true;
}
bool Reader::pushError(const Value& value, const JSONCPP_STRING& message, const Value& extra) {
ptrdiff_t const length = end_ - begin_;
if(value.getOffsetStart() > length
|| value.getOffsetLimit() > length
|| extra.getOffsetLimit() > length)
return false;
Token token;
token.type_ = tokenError;
token.start_ = begin_ + value.getOffsetStart();
token.end_ = begin_ + value.getOffsetLimit();
ErrorInfo info;
info.token_ = token;
info.message_ = message;
info.extra_ = begin_ + extra.getOffsetStart();
errors_.push_back(info);
return true;
}
bool Reader::good() const {
return !errors_.size();
}
// exact copy of Features
class OurFeatures {
public:
static OurFeatures all();
bool allowComments_;
bool strictRoot_;
bool allowDroppedNullPlaceholders_;
bool allowNumericKeys_;
bool allowSingleQuotes_;
bool failIfExtra_;
bool rejectDupKeys_;
bool allowSpecialFloats_;
int stackLimit_;
}; // OurFeatures
// exact copy of Implementation of class Features
// ////////////////////////////////
OurFeatures OurFeatures::all() { return OurFeatures(); }
// Implementation of class Reader
// ////////////////////////////////
// exact copy of Reader, renamed to OurReader
class OurReader {
public:
typedef char Char;
typedef const Char* Location;
struct StructuredError {
ptrdiff_t offset_start;
ptrdiff_t offset_limit;
JSONCPP_STRING message;
};
OurReader(OurFeatures const& features);
bool parse(const char* beginDoc,
const char* endDoc,
Value& root,
bool collectComments = true);
JSONCPP_STRING getFormattedErrorMessages() const;
std::vector<StructuredError> getStructuredErrors() const;
bool pushError(const Value& value, const JSONCPP_STRING& message);
bool pushError(const Value& value, const JSONCPP_STRING& message, const Value& extra);
bool good() const;
private:
OurReader(OurReader const&); // no impl
void operator=(OurReader const&); // no impl
enum TokenType {
tokenEndOfStream = 0,
tokenObjectBegin,
tokenObjectEnd,
tokenArrayBegin,
tokenArrayEnd,
tokenString,
tokenNumber,
tokenTrue,
tokenFalse,
tokenNull,
tokenNaN,
tokenPosInf,
tokenNegInf,
tokenArraySeparator,
tokenMemberSeparator,
tokenComment,
tokenError
};
class Token {
public:
TokenType type_;
Location start_;
Location end_;
};
class ErrorInfo {
public:
Token token_;
JSONCPP_STRING message_;
Location extra_;
};
typedef std::deque<ErrorInfo> Errors;
bool readToken(Token& token);
void skipSpaces();
bool match(Location pattern, int patternLength);
bool readComment();
bool readCStyleComment();
bool readCppStyleComment();
bool readString();
bool readStringSingleQuote();
bool readNumber(bool checkInf);
bool readValue();
bool readObject(Token& token);
bool readArray(Token& token);
bool decodeNumber(Token& token);
bool decodeNumber(Token& token, Value& decoded);
bool decodeString(Token& token);
bool decodeString(Token& token, JSONCPP_STRING& decoded);
bool decodeDouble(Token& token);
bool decodeDouble(Token& token, Value& decoded);
bool decodeUnicodeCodePoint(Token& token,
Location& current,
Location end,
unsigned int& unicode);
bool decodeUnicodeEscapeSequence(Token& token,
Location& current,
Location end,
unsigned int& unicode);
bool addError(const JSONCPP_STRING& message, Token& token, Location extra = 0);
bool recoverFromError(TokenType skipUntilToken);
bool addErrorAndRecover(const JSONCPP_STRING& message,
Token& token,
TokenType skipUntilToken);
void skipUntilSpace();
Value& currentValue();
Char getNextChar();
void
getLocationLineAndColumn(Location location, int& line, int& column) const;
JSONCPP_STRING getLocationLineAndColumn(Location location) const;
void addComment(Location begin, Location end, CommentPlacement placement);
void skipCommentTokens(Token& token);
static JSONCPP_STRING normalizeEOL(Location begin, Location end);
static bool containsNewLine(Location begin, Location end);
typedef std::stack<Value*> Nodes;
Nodes nodes_;
Errors errors_;
JSONCPP_STRING document_;
Location begin_;
Location end_;
Location current_;
Location lastValueEnd_;
Value* lastValue_;
JSONCPP_STRING commentsBefore_;
OurFeatures const features_;
bool collectComments_;
}; // OurReader
// complete copy of Read impl, for OurReader
bool OurReader::containsNewLine(OurReader::Location begin, OurReader::Location end) {
for (; begin < end; ++begin)
if (*begin == '\n' || *begin == '\r')
return true;
return false;
}
OurReader::OurReader(OurFeatures const& features)
: errors_(), document_(), begin_(), end_(), current_(), lastValueEnd_(),
lastValue_(), commentsBefore_(),
features_(features), collectComments_() {
}
bool OurReader::parse(const char* beginDoc,
const char* endDoc,
Value& root,
bool collectComments) {
if (!features_.allowComments_) {
collectComments = false;
}
begin_ = beginDoc;
end_ = endDoc;
collectComments_ = collectComments;
current_ = begin_;
lastValueEnd_ = 0;
lastValue_ = 0;
commentsBefore_.clear();
errors_.clear();
while (!nodes_.empty())
nodes_.pop();
nodes_.push(&root);
bool successful = readValue();
Token token;
skipCommentTokens(token);
if (features_.failIfExtra_) {
if ((features_.strictRoot_ || token.type_ != tokenError) && token.type_ != tokenEndOfStream) {
addError("Extra non-whitespace after JSON value.", token);
return false;
}
}
if (collectComments_ && !commentsBefore_.empty())
root.setComment(commentsBefore_, commentAfter);
if (features_.strictRoot_) {
if (!root.isArray() && !root.isObject()) {
// Set error location to start of doc, ideally should be first token found
// in doc
token.type_ = tokenError;
token.start_ = beginDoc;
token.end_ = endDoc;
addError(
"A valid JSON document must be either an array or an object value.",
token);
return false;
}
}
return successful;
}
bool OurReader::readValue() {
// To preserve the old behaviour we cast size_t to int.
if (static_cast<int>(nodes_.size()) > features_.stackLimit_) throwRuntimeError("Exceeded stackLimit in readValue().");
Token token;
skipCommentTokens(token);
bool successful = true;
if (collectComments_ && !commentsBefore_.empty()) {
currentValue().setComment(commentsBefore_, commentBefore);
commentsBefore_.clear();
}
switch (token.type_) {
case tokenObjectBegin:
successful = readObject(token);
currentValue().setOffsetLimit(current_ - begin_);
break;
case tokenArrayBegin:
successful = readArray(token);
currentValue().setOffsetLimit(current_ - begin_);
break;
case tokenNumber:
successful = decodeNumber(token);
break;
case tokenString:
successful = decodeString(token);
break;
case tokenTrue:
{
Value v(true);
currentValue().swapPayload(v);
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
}
break;
case tokenFalse:
{
Value v(false);
currentValue().swapPayload(v);
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
}
break;
case tokenNull:
{
Value v;
currentValue().swapPayload(v);
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
}
break;
case tokenNaN:
{
Value v(std::numeric_limits<double>::quiet_NaN());
currentValue().swapPayload(v);
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
}
break;
case tokenPosInf:
{
Value v(std::numeric_limits<double>::infinity());
currentValue().swapPayload(v);
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
}
break;
case tokenNegInf:
{
Value v(-std::numeric_limits<double>::infinity());
currentValue().swapPayload(v);
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
}
break;
case tokenArraySeparator:
case tokenObjectEnd:
case tokenArrayEnd:
if (features_.allowDroppedNullPlaceholders_) {
// "Un-read" the current token and mark the current value as a null
// token.
current_--;
Value v;
currentValue().swapPayload(v);
currentValue().setOffsetStart(current_ - begin_ - 1);
currentValue().setOffsetLimit(current_ - begin_);
break;
} // else, fall through ...
default:
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
return addError("Syntax error: value, object or array expected.", token);
}
if (collectComments_) {
lastValueEnd_ = current_;
lastValue_ = &currentValue();
}
return successful;
}
void OurReader::skipCommentTokens(Token& token) {
if (features_.allowComments_) {
do {
readToken(token);
} while (token.type_ == tokenComment);
} else {
readToken(token);
}
}
bool OurReader::readToken(Token& token) {
skipSpaces();
token.start_ = current_;
Char c = getNextChar();
bool ok = true;
switch (c) {
case '{':
token.type_ = tokenObjectBegin;
break;
case '}':
token.type_ = tokenObjectEnd;
break;
case '[':
token.type_ = tokenArrayBegin;
break;
case ']':
token.type_ = tokenArrayEnd;
break;
case '"':
token.type_ = tokenString;
ok = readString();
break;
case '\'':
if (features_.allowSingleQuotes_) {
token.type_ = tokenString;
ok = readStringSingleQuote();
break;
} // else fall through
case '/':
token.type_ = tokenComment;
ok = readComment();
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
token.type_ = tokenNumber;
readNumber(false);
break;
case '-':
if (readNumber(true)) {
token.type_ = tokenNumber;
} else {
token.type_ = tokenNegInf;
ok = features_.allowSpecialFloats_ && match("nfinity", 7);
}
break;
case 't':
token.type_ = tokenTrue;
ok = match("rue", 3);
break;
case 'f':
token.type_ = tokenFalse;
ok = match("alse", 4);
break;
case 'n':
token.type_ = tokenNull;
ok = match("ull", 3);
break;
case 'N':
if (features_.allowSpecialFloats_) {
token.type_ = tokenNaN;
ok = match("aN", 2);
} else {
ok = false;
}
break;
case 'I':
if (features_.allowSpecialFloats_) {
token.type_ = tokenPosInf;
ok = match("nfinity", 7);
} else {
ok = false;
}
break;
case ',':
token.type_ = tokenArraySeparator;
break;
case ':':
token.type_ = tokenMemberSeparator;
break;
case 0:
token.type_ = tokenEndOfStream;
break;
default:
ok = false;
break;
}
if (!ok)
token.type_ = tokenError;
token.end_ = current_;
return true;
}
void OurReader::skipSpaces() {
while (current_ != end_) {
Char c = *current_;
if (c == ' ' || c == '\t' || c == '\r' || c == '\n')
++current_;
else
break;
}
}
bool OurReader::match(Location pattern, int patternLength) {
if (end_ - current_ < patternLength)
return false;
int index = patternLength;
while (index--)
if (current_[index] != pattern[index])
return false;
current_ += patternLength;
return true;
}
bool OurReader::readComment() {
Location commentBegin = current_ - 1;
Char c = getNextChar();
bool successful = false;
if (c == '*')
successful = readCStyleComment();
else if (c == '/')
successful = readCppStyleComment();
if (!successful)
return false;
if (collectComments_) {
CommentPlacement placement = commentBefore;
if (lastValueEnd_ && !containsNewLine(lastValueEnd_, commentBegin)) {
if (c != '*' || !containsNewLine(commentBegin, current_))
placement = commentAfterOnSameLine;
}
addComment(commentBegin, current_, placement);
}
return true;
}
JSONCPP_STRING OurReader::normalizeEOL(OurReader::Location begin, OurReader::Location end) {
JSONCPP_STRING normalized;
normalized.reserve(static_cast<size_t>(end - begin));
OurReader::Location current = begin;
while (current != end) {
char c = *current++;
if (c == '\r') {
if (current != end && *current == '\n')
// convert dos EOL
++current;
// convert Mac EOL
normalized += '\n';
} else {
normalized += c;
}
}
return normalized;
}
void
OurReader::addComment(Location begin, Location end, CommentPlacement placement) {
assert(collectComments_);
const JSONCPP_STRING& normalized = normalizeEOL(begin, end);
if (placement == commentAfterOnSameLine) {
assert(lastValue_ != 0);
lastValue_->setComment(normalized, placement);
} else {
commentsBefore_ += normalized;
}
}
bool OurReader::readCStyleComment() {
while ((current_ + 1) < end_) {
Char c = getNextChar();
if (c == '*' && *current_ == '/')
break;
}
return getNextChar() == '/';
}
bool OurReader::readCppStyleComment() {
while (current_ != end_) {
Char c = getNextChar();
if (c == '\n')
break;
if (c == '\r') {
// Consume DOS EOL. It will be normalized in addComment.
if (current_ != end_ && *current_ == '\n')
getNextChar();
// Break on Moc OS 9 EOL.
break;
}
}
return true;
}
bool OurReader::readNumber(bool checkInf) {
const char *p = current_;
if (checkInf && p != end_ && *p == 'I') {
current_ = ++p;
return false;
}
char c = '0'; // stopgap for already consumed character
// integral part
while (c >= '0' && c <= '9')
c = (current_ = p) < end_ ? *p++ : '\0';
// fractional part
if (c == '.') {
c = (current_ = p) < end_ ? *p++ : '\0';
while (c >= '0' && c <= '9')
c = (current_ = p) < end_ ? *p++ : '\0';
}
// exponential part
if (c == 'e' || c == 'E') {
c = (current_ = p) < end_ ? *p++ : '\0';
if (c == '+' || c == '-')
c = (current_ = p) < end_ ? *p++ : '\0';
while (c >= '0' && c <= '9')
c = (current_ = p) < end_ ? *p++ : '\0';
}
return true;
}
bool OurReader::readString() {
Char c = 0;
while (current_ != end_) {
c = getNextChar();
if (c == '\\')
getNextChar();
else if (c == '"')
break;
}
return c == '"';
}
bool OurReader::readStringSingleQuote() {
Char c = 0;
while (current_ != end_) {
c = getNextChar();
if (c == '\\')
getNextChar();
else if (c == '\'')
break;
}
return c == '\'';
}
bool OurReader::readObject(Token& tokenStart) {
Token tokenName;
JSONCPP_STRING name;
Value init(objectValue);
currentValue().swapPayload(init);
currentValue().setOffsetStart(tokenStart.start_ - begin_);
while (readToken(tokenName)) {
bool initialTokenOk = true;
while (tokenName.type_ == tokenComment && initialTokenOk)
initialTokenOk = readToken(tokenName);
if (!initialTokenOk)
break;
if (tokenName.type_ == tokenObjectEnd && name.empty()) // empty object
return true;
name.clear();
if (tokenName.type_ == tokenString) {
if (!decodeString(tokenName, name))
return recoverFromError(tokenObjectEnd);
} else if (tokenName.type_ == tokenNumber && features_.allowNumericKeys_) {
Value numberName;
if (!decodeNumber(tokenName, numberName))
return recoverFromError(tokenObjectEnd);
name = numberName.asString();
} else {
break;
}
Token colon;
if (!readToken(colon) || colon.type_ != tokenMemberSeparator) {
return addErrorAndRecover(
"Missing ':' after object member name", colon, tokenObjectEnd);
}
if (name.length() >= (1U<<30)) throwRuntimeError("keylength >= 2^30");
if (features_.rejectDupKeys_ && currentValue().isMember(name)) {
JSONCPP_STRING msg = "Duplicate key: '" + name + "'";
return addErrorAndRecover(
msg, tokenName, tokenObjectEnd);
}
Value& value = currentValue()[name];
nodes_.push(&value);
bool ok = readValue();
nodes_.pop();
if (!ok) // error already set
return recoverFromError(tokenObjectEnd);
Token comma;
if (!readToken(comma) ||
(comma.type_ != tokenObjectEnd && comma.type_ != tokenArraySeparator &&
comma.type_ != tokenComment)) {
return addErrorAndRecover(
"Missing ',' or '}' in object declaration", comma, tokenObjectEnd);
}
bool finalizeTokenOk = true;
while (comma.type_ == tokenComment && finalizeTokenOk)
finalizeTokenOk = readToken(comma);
if (comma.type_ == tokenObjectEnd)
return true;
}
return addErrorAndRecover(
"Missing '}' or object member name", tokenName, tokenObjectEnd);
}
bool OurReader::readArray(Token& tokenStart) {
Value init(arrayValue);
currentValue().swapPayload(init);
currentValue().setOffsetStart(tokenStart.start_ - begin_);
skipSpaces();
if (current_ != end_ && *current_ == ']') // empty array
{
Token endArray;
readToken(endArray);
return true;
}
int index = 0;
for (;;) {
Value& value = currentValue()[index++];
nodes_.push(&value);
bool ok = readValue();
nodes_.pop();
if (!ok) // error already set
return recoverFromError(tokenArrayEnd);
Token token;
// Accept Comment after last item in the array.
ok = readToken(token);
while (token.type_ == tokenComment && ok) {
ok = readToken(token);
}
bool badTokenType =
(token.type_ != tokenArraySeparator && token.type_ != tokenArrayEnd);
if (!ok || badTokenType) {
return addErrorAndRecover(
"Missing ',' or ']' in array declaration", token, tokenArrayEnd);
}
if (token.type_ == tokenArrayEnd)
break;
}
return true;
}
bool OurReader::decodeNumber(Token& token) {
Value decoded;
if (!decodeNumber(token, decoded))
return false;
currentValue().swapPayload(decoded);
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
return true;
}
bool OurReader::decodeNumber(Token& token, Value& decoded) {
// Attempts to parse the number as an integer. If the number is
// larger than the maximum supported value of an integer then
// we decode the number as a double.
Location current = token.start_;
bool isNegative = *current == '-';
if (isNegative)
++current;
// TODO: Help the compiler do the div and mod at compile time or get rid of them.
Value::LargestUInt maxIntegerValue =
isNegative ? Value::LargestUInt(-Value::minLargestInt)
: Value::maxLargestUInt;
Value::LargestUInt threshold = maxIntegerValue / 10;
Value::LargestUInt value = 0;
while (current < token.end_) {
Char c = *current++;
if (c < '0' || c > '9')
return decodeDouble(token, decoded);
Value::UInt digit(static_cast<Value::UInt>(c - '0'));
if (value >= threshold) {
// We've hit or exceeded the max value divided by 10 (rounded down). If
// a) we've only just touched the limit, b) this is the last digit, and
// c) it's small enough to fit in that rounding delta, we're okay.
// Otherwise treat this number as a double to avoid overflow.
if (value > threshold || current != token.end_ ||
digit > maxIntegerValue % 10) {
return decodeDouble(token, decoded);
}
}
value = value * 10 + digit;
}
if (isNegative)
decoded = -Value::LargestInt(value);
else if (value <= Value::LargestUInt(Value::maxInt))
decoded = Value::LargestInt(value);
else
decoded = value;
return true;
}
bool OurReader::decodeDouble(Token& token) {
Value decoded;
if (!decodeDouble(token, decoded))
return false;
currentValue().swapPayload(decoded);
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
return true;
}
bool OurReader::decodeDouble(Token& token, Value& decoded) {
double value = 0;
const int bufferSize = 32;
int count;
ptrdiff_t const length = token.end_ - token.start_;
// Sanity check to avoid buffer overflow exploits.
if (length < 0) {
return addError("Unable to parse token length", token);
}
size_t const ulength = static_cast<size_t>(length);
// Avoid using a string constant for the format control string given to
// sscanf, as this can cause hard to debug crashes on OS X. See here for more
// info:
//
// http://developer.apple.com/library/mac/#DOCUMENTATION/DeveloperTools/gcc-4.0.1/gcc/Incompatibilities.html
char format[] = "%lf";
if (length <= bufferSize) {
Char buffer[bufferSize + 1];
memcpy(buffer, token.start_, ulength);
buffer[length] = 0;
fixNumericLocaleInput(buffer, buffer + length);
count = sscanf(buffer, format, &value);
} else {
JSONCPP_STRING buffer(token.start_, token.end_);
count = sscanf(buffer.c_str(), format, &value);
}
if (count != 1)
return addError("'" + JSONCPP_STRING(token.start_, token.end_) +
"' is not a number.",
token);
decoded = value;
return true;
}
bool OurReader::decodeString(Token& token) {
JSONCPP_STRING decoded_string;
if (!decodeString(token, decoded_string))
return false;
Value decoded(decoded_string);
currentValue().swapPayload(decoded);
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
return true;
}
bool OurReader::decodeString(Token& token, JSONCPP_STRING& decoded) {
decoded.reserve(static_cast<size_t>(token.end_ - token.start_ - 2));
Location current = token.start_ + 1; // skip '"'
Location end = token.end_ - 1; // do not include '"'
while (current != end) {
Char c = *current++;
if (c == '"')
break;
else if (c == '\\') {
if (current == end)
return addError("Empty escape sequence in string", token, current);
Char escape = *current++;
switch (escape) {
case '"':
decoded += '"';
break;
case '/':
decoded += '/';
break;
case '\\':
decoded += '\\';
break;
case 'b':
decoded += '\b';
break;
case 'f':
decoded += '\f';
break;
case 'n':
decoded += '\n';
break;
case 'r':
decoded += '\r';
break;
case 't':
decoded += '\t';
break;
case 'u': {
unsigned int unicode;
if (!decodeUnicodeCodePoint(token, current, end, unicode))
return false;
decoded += codePointToUTF8(unicode);
} break;
default:
return addError("Bad escape sequence in string", token, current);
}
} else {
decoded += c;
}
}
return true;
}
bool OurReader::decodeUnicodeCodePoint(Token& token,
Location& current,
Location end,
unsigned int& unicode) {
if (!decodeUnicodeEscapeSequence(token, current, end, unicode))
return false;
if (unicode >= 0xD800 && unicode <= 0xDBFF) {
// surrogate pairs
if (end - current < 6)
return addError(
"additional six characters expected to parse unicode surrogate pair.",
token,
current);
unsigned int surrogatePair;
if (*(current++) == '\\' && *(current++) == 'u') {
if (decodeUnicodeEscapeSequence(token, current, end, surrogatePair)) {
unicode = 0x10000 + ((unicode & 0x3FF) << 10) + (surrogatePair & 0x3FF);
} else
return false;
} else
return addError("expecting another \\u token to begin the second half of "
"a unicode surrogate pair",
token,
current);
}
return true;
}
bool OurReader::decodeUnicodeEscapeSequence(Token& token,
Location& current,
Location end,
unsigned int& ret_unicode) {
if (end - current < 4)
return addError(
"Bad unicode escape sequence in string: four digits expected.",
token,
current);
int unicode = 0;
for (int index = 0; index < 4; ++index) {
Char c = *current++;
unicode *= 16;
if (c >= '0' && c <= '9')
unicode += c - '0';
else if (c >= 'a' && c <= 'f')
unicode += c - 'a' + 10;
else if (c >= 'A' && c <= 'F')
unicode += c - 'A' + 10;
else
return addError(
"Bad unicode escape sequence in string: hexadecimal digit expected.",
token,
current);
}
ret_unicode = static_cast<unsigned int>(unicode);
return true;
}
bool
OurReader::addError(const JSONCPP_STRING& message, Token& token, Location extra) {
ErrorInfo info;
info.token_ = token;
info.message_ = message;
info.extra_ = extra;
errors_.push_back(info);
return false;
}
bool OurReader::recoverFromError(TokenType skipUntilToken) {
size_t errorCount = errors_.size();
Token skip;
for (;;) {
if (!readToken(skip))
errors_.resize(errorCount); // discard errors caused by recovery
if (skip.type_ == skipUntilToken || skip.type_ == tokenEndOfStream)
break;
}
errors_.resize(errorCount);
return false;
}
bool OurReader::addErrorAndRecover(const JSONCPP_STRING& message,
Token& token,
TokenType skipUntilToken) {
addError(message, token);
return recoverFromError(skipUntilToken);
}
Value& OurReader::currentValue() { return *(nodes_.top()); }
OurReader::Char OurReader::getNextChar() {
if (current_ == end_)
return 0;
return *current_++;
}
void OurReader::getLocationLineAndColumn(Location location,
int& line,
int& column) const {
Location current = begin_;
Location lastLineStart = current;
line = 0;
while (current < location && current != end_) {
Char c = *current++;
if (c == '\r') {
if (*current == '\n')
++current;
lastLineStart = current;
++line;
} else if (c == '\n') {
lastLineStart = current;
++line;
}
}
// column & line start at 1
column = int(location - lastLineStart) + 1;
++line;
}
JSONCPP_STRING OurReader::getLocationLineAndColumn(Location location) const {
int line, column;
getLocationLineAndColumn(location, line, column);
char buffer[18 + 16 + 16 + 1];
snprintf(buffer, sizeof(buffer), "Line %d, Column %d", line, column);
return buffer;
}
JSONCPP_STRING OurReader::getFormattedErrorMessages() const {
JSONCPP_STRING formattedMessage;
for (Errors::const_iterator itError = errors_.begin();
itError != errors_.end();
++itError) {
const ErrorInfo& error = *itError;
formattedMessage +=
"* " + getLocationLineAndColumn(error.token_.start_) + "\n";
formattedMessage += " " + error.message_ + "\n";
if (error.extra_)
formattedMessage +=
"See " + getLocationLineAndColumn(error.extra_) + " for detail.\n";
}
return formattedMessage;
}
std::vector<OurReader::StructuredError> OurReader::getStructuredErrors() const {
std::vector<OurReader::StructuredError> allErrors;
for (Errors::const_iterator itError = errors_.begin();
itError != errors_.end();
++itError) {
const ErrorInfo& error = *itError;
OurReader::StructuredError structured;
structured.offset_start = error.token_.start_ - begin_;
structured.offset_limit = error.token_.end_ - begin_;
structured.message = error.message_;
allErrors.push_back(structured);
}
return allErrors;
}
bool OurReader::pushError(const Value& value, const JSONCPP_STRING& message) {
ptrdiff_t length = end_ - begin_;
if(value.getOffsetStart() > length
|| value.getOffsetLimit() > length)
return false;
Token token;
token.type_ = tokenError;
token.start_ = begin_ + value.getOffsetStart();
token.end_ = end_ + value.getOffsetLimit();
ErrorInfo info;
info.token_ = token;
info.message_ = message;
info.extra_ = 0;
errors_.push_back(info);
return true;
}
bool OurReader::pushError(const Value& value, const JSONCPP_STRING& message, const Value& extra) {
ptrdiff_t length = end_ - begin_;
if(value.getOffsetStart() > length
|| value.getOffsetLimit() > length
|| extra.getOffsetLimit() > length)
return false;
Token token;
token.type_ = tokenError;
token.start_ = begin_ + value.getOffsetStart();
token.end_ = begin_ + value.getOffsetLimit();
ErrorInfo info;
info.token_ = token;
info.message_ = message;
info.extra_ = begin_ + extra.getOffsetStart();
errors_.push_back(info);
return true;
}
bool OurReader::good() const {
return !errors_.size();
}
class OurCharReader : public CharReader {
bool const collectComments_;
OurReader reader_;
public:
OurCharReader(
bool collectComments,
OurFeatures const& features)
: collectComments_(collectComments)
, reader_(features)
{}
bool parse(
char const* beginDoc, char const* endDoc,
Value* root, JSONCPP_STRING* errs) JSONCPP_OVERRIDE {
bool ok = reader_.parse(beginDoc, endDoc, *root, collectComments_);
if (errs) {
*errs = reader_.getFormattedErrorMessages();
}
return ok;
}
};
CharReaderBuilder::CharReaderBuilder()
{
setDefaults(&settings_);
}
CharReaderBuilder::~CharReaderBuilder()
{}
CharReader* CharReaderBuilder::newCharReader() const
{
bool collectComments = settings_["collectComments"].asBool();
OurFeatures features = OurFeatures::all();
features.allowComments_ = settings_["allowComments"].asBool();
features.strictRoot_ = settings_["strictRoot"].asBool();
features.allowDroppedNullPlaceholders_ = settings_["allowDroppedNullPlaceholders"].asBool();
features.allowNumericKeys_ = settings_["allowNumericKeys"].asBool();
features.allowSingleQuotes_ = settings_["allowSingleQuotes"].asBool();
features.stackLimit_ = settings_["stackLimit"].asInt();
features.failIfExtra_ = settings_["failIfExtra"].asBool();
features.rejectDupKeys_ = settings_["rejectDupKeys"].asBool();
features.allowSpecialFloats_ = settings_["allowSpecialFloats"].asBool();
return new OurCharReader(collectComments, features);
}
static void getValidReaderKeys(std::set<JSONCPP_STRING>* valid_keys)
{
valid_keys->clear();
valid_keys->insert("collectComments");
valid_keys->insert("allowComments");
valid_keys->insert("strictRoot");
valid_keys->insert("allowDroppedNullPlaceholders");
valid_keys->insert("allowNumericKeys");
valid_keys->insert("allowSingleQuotes");
valid_keys->insert("stackLimit");
valid_keys->insert("failIfExtra");
valid_keys->insert("rejectDupKeys");
valid_keys->insert("allowSpecialFloats");
}
bool CharReaderBuilder::validate(Json::Value* invalid) const
{
Json::Value my_invalid;
if (!invalid) invalid = &my_invalid; // so we do not need to test for NULL
Json::Value& inv = *invalid;
std::set<JSONCPP_STRING> valid_keys;
getValidReaderKeys(&valid_keys);
Value::Members keys = settings_.getMemberNames();
size_t n = keys.size();
for (size_t i = 0; i < n; ++i) {
JSONCPP_STRING const& key = keys[i];
if (valid_keys.find(key) == valid_keys.end()) {
inv[key] = settings_[key];
}
}
return 0u == inv.size();
}
Value& CharReaderBuilder::operator[](JSONCPP_STRING key)
{
return settings_[key];
}
// static
void CharReaderBuilder::strictMode(Json::Value* settings)
{
//! [CharReaderBuilderStrictMode]
(*settings)["allowComments"] = false;
(*settings)["strictRoot"] = true;
(*settings)["allowDroppedNullPlaceholders"] = false;
(*settings)["allowNumericKeys"] = false;
(*settings)["allowSingleQuotes"] = false;
(*settings)["stackLimit"] = 1000;
(*settings)["failIfExtra"] = true;
(*settings)["rejectDupKeys"] = true;
(*settings)["allowSpecialFloats"] = false;
//! [CharReaderBuilderStrictMode]
}
// static
void CharReaderBuilder::setDefaults(Json::Value* settings)
{
//! [CharReaderBuilderDefaults]
(*settings)["collectComments"] = true;
(*settings)["allowComments"] = true;
(*settings)["strictRoot"] = false;
(*settings)["allowDroppedNullPlaceholders"] = false;
(*settings)["allowNumericKeys"] = false;
(*settings)["allowSingleQuotes"] = false;
(*settings)["stackLimit"] = 1000;
(*settings)["failIfExtra"] = false;
(*settings)["rejectDupKeys"] = false;
(*settings)["allowSpecialFloats"] = false;
//! [CharReaderBuilderDefaults]
}
//////////////////////////////////
// global functions
bool parseFromStream(
CharReader::Factory const& fact, JSONCPP_ISTREAM& sin,
Value* root, JSONCPP_STRING* errs)
{
JSONCPP_OSTRINGSTREAM ssin;
ssin << sin.rdbuf();
JSONCPP_STRING doc = ssin.str();
char const* begin = doc.data();
char const* end = begin + doc.size();
// Note that we do not actually need a null-terminator.
CharReaderPtr const reader(fact.newCharReader());
return reader->parse(begin, end, root, errs);
}
JSONCPP_ISTREAM& operator>>(JSONCPP_ISTREAM& sin, Value& root) {
CharReaderBuilder b;
JSONCPP_STRING errs;
bool ok = parseFromStream(b, sin, &root, &errs);
if (!ok) {
throwRuntimeError(errs);
}
return sin;
}
} // namespace Json
// //////////////////////////////////////////////////////////////////////
// End of content of file: src/lib_json/json_reader.cpp
// //////////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////////
// Beginning of content of file: src/lib_json/json_valueiterator.inl
// //////////////////////////////////////////////////////////////////////
// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
// Distributed under MIT license, or public domain if desired and
// recognized in your jurisdiction.
// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
// included by json_value.cpp
namespace Json {
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// class ValueIteratorBase
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
ValueIteratorBase::ValueIteratorBase()
: current_(), isNull_(true) {
}
ValueIteratorBase::ValueIteratorBase(
const Value::ObjectValues::iterator& current)
: current_(current), isNull_(false) {}
Value& ValueIteratorBase::deref() const {
return current_->second;
}
void ValueIteratorBase::increment() {
++current_;
}
void ValueIteratorBase::decrement() {
--current_;
}
ValueIteratorBase::difference_type
ValueIteratorBase::computeDistance(const SelfType& other) const {
#ifdef JSON_USE_CPPTL_SMALLMAP
return other.current_ - current_;
#else
// Iterator for null value are initialized using the default
// constructor, which initialize current_ to the default
// std::map::iterator. As begin() and end() are two instance
// of the default std::map::iterator, they can not be compared.
// To allow this, we handle this comparison specifically.
if (isNull_ && other.isNull_) {
return 0;
}
// Usage of std::distance is not portable (does not compile with Sun Studio 12
// RogueWave STL,
// which is the one used by default).
// Using a portable hand-made version for non random iterator instead:
// return difference_type( std::distance( current_, other.current_ ) );
difference_type myDistance = 0;
for (Value::ObjectValues::iterator it = current_; it != other.current_;
++it) {
++myDistance;
}
return myDistance;
#endif
}
bool ValueIteratorBase::isEqual(const SelfType& other) const {
if (isNull_) {
return other.isNull_;
}
return current_ == other.current_;
}
void ValueIteratorBase::copy(const SelfType& other) {
current_ = other.current_;
isNull_ = other.isNull_;
}
Value ValueIteratorBase::key() const {
const Value::CZString czstring = (*current_).first;
if (czstring.data()) {
if (czstring.isStaticString())
return Value(StaticString(czstring.data()));
return Value(czstring.data(), czstring.data() + czstring.length());
}
return Value(czstring.index());
}
UInt ValueIteratorBase::index() const {
const Value::CZString czstring = (*current_).first;
if (!czstring.data())
return czstring.index();
return Value::UInt(-1);
}
JSONCPP_STRING ValueIteratorBase::name() const {
char const* keey;
char const* end;
keey = memberName(&end);
if (!keey) return JSONCPP_STRING();
return JSONCPP_STRING(keey, end);
}
char const* ValueIteratorBase::memberName() const {
const char* cname = (*current_).first.data();
return cname ? cname : "";
}
char const* ValueIteratorBase::memberName(char const** end) const {
const char* cname = (*current_).first.data();
if (!cname) {
*end = NULL;
return NULL;
}
*end = cname + (*current_).first.length();
return cname;
}
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// class ValueConstIterator
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
ValueConstIterator::ValueConstIterator() {}
ValueConstIterator::ValueConstIterator(
const Value::ObjectValues::iterator& current)
: ValueIteratorBase(current) {}
ValueConstIterator::ValueConstIterator(ValueIterator const& other)
: ValueIteratorBase(other) {}
ValueConstIterator& ValueConstIterator::
operator=(const ValueIteratorBase& other) {
copy(other);
return *this;
}
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// class ValueIterator
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
ValueIterator::ValueIterator() {}
ValueIterator::ValueIterator(const Value::ObjectValues::iterator& current)
: ValueIteratorBase(current) {}
ValueIterator::ValueIterator(const ValueConstIterator& other)
: ValueIteratorBase(other) {
throwRuntimeError("ConstIterator to Iterator should never be allowed.");
}
ValueIterator::ValueIterator(const ValueIterator& other)
: ValueIteratorBase(other) {}
ValueIterator& ValueIterator::operator=(const SelfType& other) {
copy(other);
return *this;
}
} // namespace Json
// //////////////////////////////////////////////////////////////////////
// End of content of file: src/lib_json/json_valueiterator.inl
// //////////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////////
// Beginning of content of file: src/lib_json/json_value.cpp
// //////////////////////////////////////////////////////////////////////
// Copyright 2011 Baptiste Lepilleur and The JsonCpp Authors
// Distributed under MIT license, or public domain if desired and
// recognized in your jurisdiction.
// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
#if !defined(JSON_IS_AMALGAMATION)
#include <json/assertions.h>
#include <json/value.h>
#include <json/writer.h>
#endif // if !defined(JSON_IS_AMALGAMATION)
#include <math.h>
#include <sstream>
#include <utility>
#include <cstring>
#include <cassert>
#ifdef JSON_USE_CPPTL
#include <cpptl/conststring.h>
#endif
#include <cstddef> // size_t
#include <algorithm> // min()
#define JSON_ASSERT_UNREACHABLE assert(false)
namespace Json {
// This is a walkaround to avoid the static initialization of Value::null.
// kNull must be word-aligned to avoid crashing on ARM. We use an alignment of
// 8 (instead of 4) as a bit of future-proofing.
#if defined(__ARMEL__)
#define ALIGNAS(byte_alignment) __attribute__((aligned(byte_alignment)))
#else
#define ALIGNAS(byte_alignment)
#endif
//static const unsigned char ALIGNAS(8) kNull[sizeof(Value)] = { 0 };
//const unsigned char& kNullRef = kNull[0];
//const Value& Value::null = reinterpret_cast<const Value&>(kNullRef);
//const Value& Value::nullRef = null;
// static
Value const& Value::nullSingleton()
{
static Value const nullStatic;
return nullStatic;
}
// for backwards compatibility, we'll leave these global references around, but DO NOT
// use them in JSONCPP library code any more!
Value const& Value::null = Value::nullSingleton();
Value const& Value::nullRef = Value::nullSingleton();
const Int Value::minInt = Int(~(UInt(-1) / 2));
const Int Value::maxInt = Int(UInt(-1) / 2);
const UInt Value::maxUInt = UInt(-1);
#if defined(JSON_HAS_INT64)
const Int64 Value::minInt64 = Int64(~(UInt64(-1) / 2));
const Int64 Value::maxInt64 = Int64(UInt64(-1) / 2);
const UInt64 Value::maxUInt64 = UInt64(-1);
// The constant is hard-coded because some compiler have trouble
// converting Value::maxUInt64 to a double correctly (AIX/xlC).
// Assumes that UInt64 is a 64 bits integer.
static const double maxUInt64AsDouble = 18446744073709551615.0;
#endif // defined(JSON_HAS_INT64)
const LargestInt Value::minLargestInt = LargestInt(~(LargestUInt(-1) / 2));
const LargestInt Value::maxLargestInt = LargestInt(LargestUInt(-1) / 2);
const LargestUInt Value::maxLargestUInt = LargestUInt(-1);
const UInt Value::defaultRealPrecision = 17;
#if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
template <typename T, typename U>
static inline bool InRange(double d, T min, U max) {
// The casts can lose precision, but we are looking only for
// an approximate range. Might fail on edge cases though. ~cdunn
//return d >= static_cast<double>(min) && d <= static_cast<double>(max);
return d >= min && d <= max;
}
#else // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
static inline double integerToDouble(Json::UInt64 value) {
return static_cast<double>(Int64(value / 2)) * 2.0 + static_cast<double>(Int64(value & 1));
}
template <typename T> static inline double integerToDouble(T value) {
return static_cast<double>(value);
}
template <typename T, typename U>
static inline bool InRange(double d, T min, U max) {
return d >= integerToDouble(min) && d <= integerToDouble(max);
}
#endif // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
/** Duplicates the specified string value.
* @param value Pointer to the string to duplicate. Must be zero-terminated if
* length is "unknown".
* @param length Length of the value. if equals to unknown, then it will be
* computed using strlen(value).
* @return Pointer on the duplicate instance of string.
*/
static inline char* duplicateStringValue(const char* value,
size_t length)
{
// Avoid an integer overflow in the call to malloc below by limiting length
// to a sane value.
if (length >= static_cast<size_t>(Value::maxInt))
length = Value::maxInt - 1;
char* newString = static_cast<char*>(malloc(length + 1));
if (newString == NULL) {
throwRuntimeError(
"in Json::Value::duplicateStringValue(): "
"Failed to allocate string value buffer");
}
memcpy(newString, value, length);
newString[length] = 0;
return newString;
}
/* Record the length as a prefix.
*/
static inline char* duplicateAndPrefixStringValue(
const char* value,
unsigned int length)
{
// Avoid an integer overflow in the call to malloc below by limiting length
// to a sane value.
JSON_ASSERT_MESSAGE(length <= static_cast<unsigned>(Value::maxInt) - sizeof(unsigned) - 1U,
"in Json::Value::duplicateAndPrefixStringValue(): "
"length too big for prefixing");
unsigned actualLength = length + static_cast<unsigned>(sizeof(unsigned)) + 1U;
char* newString = static_cast<char*>(malloc(actualLength));
if (newString == 0) {
throwRuntimeError(
"in Json::Value::duplicateAndPrefixStringValue(): "
"Failed to allocate string value buffer");
}
*reinterpret_cast<unsigned*>(newString) = length;
memcpy(newString + sizeof(unsigned), value, length);
newString[actualLength - 1U] = 0; // to avoid buffer over-run accidents by users later
return newString;
}
inline static void decodePrefixedString(
bool isPrefixed, char const* prefixed,
unsigned* length, char const** value)
{
if (!isPrefixed) {
*length = static_cast<unsigned>(strlen(prefixed));
*value = prefixed;
} else {
*length = *reinterpret_cast<unsigned const*>(prefixed);
*value = prefixed + sizeof(unsigned);
}
}
/** Free the string duplicated by duplicateStringValue()/duplicateAndPrefixStringValue().
*/
#if JSONCPP_USING_SECURE_MEMORY
static inline void releasePrefixedStringValue(char* value) {
unsigned length = 0;
char const* valueDecoded;
decodePrefixedString(true, value, &length, &valueDecoded);
size_t const size = sizeof(unsigned) + length + 1U;
memset(value, 0, size);
free(value);
}
static inline void releaseStringValue(char* value, unsigned length) {
// length==0 => we allocated the strings memory
size_t size = (length==0) ? strlen(value) : length;
memset(value, 0, size);
free(value);
}
#else // !JSONCPP_USING_SECURE_MEMORY
static inline void releasePrefixedStringValue(char* value) {
free(value);
}
static inline void releaseStringValue(char* value, unsigned) {
free(value);
}
#endif // JSONCPP_USING_SECURE_MEMORY
} // namespace Json
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// ValueInternals...
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
#if !defined(JSON_IS_AMALGAMATION)
#include "json_valueiterator.inl"
#endif // if !defined(JSON_IS_AMALGAMATION)
namespace Json {
Exception::Exception(JSONCPP_STRING const& msg)
: msg_(msg)
{}
Exception::~Exception() JSONCPP_NOEXCEPT
{}
char const* Exception::what() const JSONCPP_NOEXCEPT
{
return msg_.c_str();
}
RuntimeError::RuntimeError(JSONCPP_STRING const& msg)
: Exception(msg)
{}
LogicError::LogicError(JSONCPP_STRING const& msg)
: Exception(msg)
{}
JSONCPP_NORETURN void throwRuntimeError(JSONCPP_STRING const& msg)
{
throw RuntimeError(msg);
}
JSONCPP_NORETURN void throwLogicError(JSONCPP_STRING const& msg)
{
throw LogicError(msg);
}
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// class Value::CommentInfo
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
Value::CommentInfo::CommentInfo() : comment_(0)
{}
Value::CommentInfo::~CommentInfo() {
if (comment_)
releaseStringValue(comment_, 0u);
}
void Value::CommentInfo::setComment(const char* text, size_t len) {
if (comment_) {
releaseStringValue(comment_, 0u);
comment_ = 0;
}
JSON_ASSERT(text != 0);
JSON_ASSERT_MESSAGE(
text[0] == '\0' || text[0] == '/',
"in Json::Value::setComment(): Comments must start with /");
// It seems that /**/ style comments are acceptable as well.
comment_ = duplicateStringValue(text, len);
}
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// class Value::CZString
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// Notes: policy_ indicates if the string was allocated when
// a string is stored.
Value::CZString::CZString(ArrayIndex aindex) : cstr_(0), index_(aindex) {}
Value::CZString::CZString(char const* str, unsigned ulength, DuplicationPolicy allocate)
: cstr_(str) {
// allocate != duplicate
storage_.policy_ = allocate & 0x3;
storage_.length_ = ulength & 0x3FFFFFFF;
}
Value::CZString::CZString(const CZString& other) {
cstr_ = (other.storage_.policy_ != noDuplication && other.cstr_ != 0
? duplicateStringValue(other.cstr_, other.storage_.length_)
: other.cstr_);
storage_.policy_ = static_cast<unsigned>(other.cstr_
? (static_cast<DuplicationPolicy>(other.storage_.policy_) == noDuplication
? noDuplication : duplicate)
: static_cast<DuplicationPolicy>(other.storage_.policy_)) & 3U;
storage_.length_ = other.storage_.length_;
}
#if JSON_HAS_RVALUE_REFERENCES
Value::CZString::CZString(CZString&& other)
: cstr_(other.cstr_), index_(other.index_) {
other.cstr_ = nullptr;
}
#endif
Value::CZString::~CZString() {
if (cstr_ && storage_.policy_ == duplicate) {
releaseStringValue(const_cast<char*>(cstr_), storage_.length_ + 1u); //+1 for null terminating character for sake of completeness but not actually necessary
}
}
void Value::CZString::swap(CZString& other) {
std::swap(cstr_, other.cstr_);
std::swap(index_, other.index_);
}
Value::CZString& Value::CZString::operator=(const CZString& other) {
cstr_ = other.cstr_;
index_ = other.index_;
return *this;
}
#if JSON_HAS_RVALUE_REFERENCES
Value::CZString& Value::CZString::operator=(CZString&& other) {
cstr_ = other.cstr_;
index_ = other.index_;
other.cstr_ = nullptr;
return *this;
}
#endif
bool Value::CZString::operator<(const CZString& other) const {
if (!cstr_) return index_ < other.index_;
//return strcmp(cstr_, other.cstr_) < 0;
// Assume both are strings.
unsigned this_len = this->storage_.length_;
unsigned other_len = other.storage_.length_;
unsigned min_len = std::min<unsigned>(this_len, other_len);
JSON_ASSERT(this->cstr_ && other.cstr_);
int comp = memcmp(this->cstr_, other.cstr_, min_len);
if (comp < 0) return true;
if (comp > 0) return false;
return (this_len < other_len);
}
bool Value::CZString::operator==(const CZString& other) const {
if (!cstr_) return index_ == other.index_;
//return strcmp(cstr_, other.cstr_) == 0;
// Assume both are strings.
unsigned this_len = this->storage_.length_;
unsigned other_len = other.storage_.length_;
if (this_len != other_len) return false;
JSON_ASSERT(this->cstr_ && other.cstr_);
int comp = memcmp(this->cstr_, other.cstr_, this_len);
return comp == 0;
}
ArrayIndex Value::CZString::index() const { return index_; }
//const char* Value::CZString::c_str() const { return cstr_; }
const char* Value::CZString::data() const { return cstr_; }
unsigned Value::CZString::length() const { return storage_.length_; }
bool Value::CZString::isStaticString() const { return storage_.policy_ == noDuplication; }
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// class Value::Value
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
// //////////////////////////////////////////////////////////////////
/*! \internal Default constructor initialization must be equivalent to:
* memset( this, 0, sizeof(Value) )
* This optimization is used in ValueInternalMap fast allocator.
*/
Value::Value(ValueType vtype) {
static char const emptyString[] = "";
initBasic(vtype);
switch (vtype) {
case nullValue:
break;
case intValue:
case uintValue:
value_.int_ = 0;
break;
case realValue:
value_.real_ = 0.0;
break;
case stringValue:
// allocated_ == false, so this is safe.
value_.string_ = const_cast<char*>(static_cast<char const*>(emptyString));
break;
case arrayValue:
case objectValue:
value_.map_ = new ObjectValues();
break;
case booleanValue:
value_.bool_ = false;
break;
default:
JSON_ASSERT_UNREACHABLE;
}
}
Value::Value(Int value) {
initBasic(intValue);
value_.int_ = value;
}
Value::Value(UInt value) {
initBasic(uintValue);
value_.uint_ = value;
}
#if defined(JSON_HAS_INT64)
Value::Value(Int64 value) {
initBasic(intValue);
value_.int_ = value;
}
Value::Value(UInt64 value) {
initBasic(uintValue);
value_.uint_ = value;
}
#endif // defined(JSON_HAS_INT64)
Value::Value(double value) {
initBasic(realValue);
value_.real_ = value;
}
Value::Value(const char* value) {
initBasic(stringValue, true);
JSON_ASSERT_MESSAGE(value != NULL, "Null Value Passed to Value Constructor");
value_.string_ = duplicateAndPrefixStringValue(value, static_cast<unsigned>(strlen(value)));
}
Value::Value(const char* beginValue, const char* endValue) {
initBasic(stringValue, true);
value_.string_ =
duplicateAndPrefixStringValue(beginValue, static_cast<unsigned>(endValue - beginValue));
}
Value::Value(const JSONCPP_STRING& value) {
initBasic(stringValue, true);
value_.string_ =
duplicateAndPrefixStringValue(value.data(), static_cast<unsigned>(value.length()));
}
Value::Value(const StaticString& value) {
initBasic(stringValue);
value_.string_ = const_cast<char*>(value.c_str());
}
#ifdef JSON_USE_CPPTL
Value::Value(const CppTL::ConstString& value) {
initBasic(stringValue, true);
value_.string_ = duplicateAndPrefixStringValue(value, static_cast<unsigned>(value.length()));
}
#endif
Value::Value(bool value) {
initBasic(booleanValue);
value_.bool_ = value;
}
Value::Value(const Value& other) {
dupPayload(other);
dupMeta(other);
}
#if JSON_HAS_RVALUE_REFERENCES
// Move constructor
Value::Value(Value&& other) {
initBasic(nullValue);
swap(other);
}
#endif
Value::~Value() {
releasePayload();
delete[] comments_;
value_.uint_ = 0;
}
Value& Value::operator=(Value other) {
swap(other);
return *this;
}
void Value::swapPayload(Value& other) {
ValueType temp = type_;
type_ = other.type_;
other.type_ = temp;
std::swap(value_, other.value_);
int temp2 = allocated_;
allocated_ = other.allocated_;
other.allocated_ = temp2 & 0x1;
}
void Value::copyPayload(const Value& other) {
releasePayload();
dupPayload(other);
}
void Value::swap(Value& other) {
swapPayload(other);
std::swap(comments_, other.comments_);
std::swap(start_, other.start_);
std::swap(limit_, other.limit_);
}
void Value::copy(const Value& other) {
copyPayload(other);
delete[] comments_;
dupMeta(other);
}
ValueType Value::type() const { return type_; }
int Value::compare(const Value& other) const {
if (*this < other)
return -1;
if (*this > other)
return 1;
return 0;
}
bool Value::operator<(const Value& other) const {
int typeDelta = type_ - other.type_;
if (typeDelta)
return typeDelta < 0 ? true : false;
switch (type_) {
case nullValue:
return false;
case intValue:
return value_.int_ < other.value_.int_;
case uintValue:
return value_.uint_ < other.value_.uint_;
case realValue:
return value_.real_ < other.value_.real_;
case booleanValue:
return value_.bool_ < other.value_.bool_;
case stringValue:
{
if ((value_.string_ == 0) || (other.value_.string_ == 0)) {
if (other.value_.string_) return true;
else return false;
}
unsigned this_len;
unsigned other_len;
char const* this_str;
char const* other_str;
decodePrefixedString(this->allocated_, this->value_.string_, &this_len, &this_str);
decodePrefixedString(other.allocated_, other.value_.string_, &other_len, &other_str);
unsigned min_len = std::min<unsigned>(this_len, other_len);
JSON_ASSERT(this_str && other_str);
int comp = memcmp(this_str, other_str, min_len);
if (comp < 0) return true;
if (comp > 0) return false;
return (this_len < other_len);
}
case arrayValue:
case objectValue: {
int delta = int(value_.map_->size() - other.value_.map_->size());
if (delta)
return delta < 0;
return (*value_.map_) < (*other.value_.map_);
}
default:
JSON_ASSERT_UNREACHABLE;
}
return false; // unreachable
}
bool Value::operator<=(const Value& other) const { return !(other < *this); }
bool Value::operator>=(const Value& other) const { return !(*this < other); }
bool Value::operator>(const Value& other) const { return other < *this; }
bool Value::operator==(const Value& other) const {
// if ( type_ != other.type_ )
// GCC 2.95.3 says:
// attempt to take address of bit-field structure member `Json::Value::type_'
// Beats me, but a temp solves the problem.
int temp = other.type_;
if (type_ != temp)
return false;
switch (type_) {
case nullValue:
return true;
case intValue:
return value_.int_ == other.value_.int_;
case uintValue:
return value_.uint_ == other.value_.uint_;
case realValue:
return value_.real_ == other.value_.real_;
case booleanValue:
return value_.bool_ == other.value_.bool_;
case stringValue:
{
if ((value_.string_ == 0) || (other.value_.string_ == 0)) {
return (value_.string_ == other.value_.string_);
}
unsigned this_len;
unsigned other_len;
char const* this_str;
char const* other_str;
decodePrefixedString(this->allocated_, this->value_.string_, &this_len, &this_str);
decodePrefixedString(other.allocated_, other.value_.string_, &other_len, &other_str);
if (this_len != other_len) return false;
JSON_ASSERT(this_str && other_str);
int comp = memcmp(this_str, other_str, this_len);
return comp == 0;
}
case arrayValue:
case objectValue:
return value_.map_->size() == other.value_.map_->size() &&
(*value_.map_) == (*other.value_.map_);
default:
JSON_ASSERT_UNREACHABLE;
}
return false; // unreachable
}
bool Value::operator!=(const Value& other) const { return !(*this == other); }
const char* Value::asCString() const {
JSON_ASSERT_MESSAGE(type_ == stringValue,
"in Json::Value::asCString(): requires stringValue");
if (value_.string_ == 0) return 0;
unsigned this_len;
char const* this_str;
decodePrefixedString(this->allocated_, this->value_.string_, &this_len, &this_str);
return this_str;
}
#if JSONCPP_USING_SECURE_MEMORY
unsigned Value::getCStringLength() const {
JSON_ASSERT_MESSAGE(type_ == stringValue,
"in Json::Value::asCString(): requires stringValue");
if (value_.string_ == 0) return 0;
unsigned this_len;
char const* this_str;
decodePrefixedString(this->allocated_, this->value_.string_, &this_len, &this_str);
return this_len;
}
#endif
bool Value::getString(char const** str, char const** cend) const {
if (type_ != stringValue) return false;
if (value_.string_ == 0) return false;
unsigned length;
decodePrefixedString(this->allocated_, this->value_.string_, &length, str);
*cend = *str + length;
return true;
}
JSONCPP_STRING Value::asString() const {
switch (type_) {
case nullValue:
return "";
case stringValue:
{
if (value_.string_ == 0) return "";
unsigned this_len;
char const* this_str;
decodePrefixedString(this->allocated_, this->value_.string_, &this_len, &this_str);
return JSONCPP_STRING(this_str, this_len);
}
case booleanValue:
return value_.bool_ ? "true" : "false";
case intValue:
return valueToString(value_.int_);
case uintValue:
return valueToString(value_.uint_);
case realValue:
return valueToString(value_.real_);
default:
JSON_FAIL_MESSAGE("Type is not convertible to string");
}
}
#ifdef JSON_USE_CPPTL
CppTL::ConstString Value::asConstString() const {
unsigned len;
char const* str;
decodePrefixedString(allocated_, value_.string_,
&len, &str);
return CppTL::ConstString(str, len);
}
#endif
Value::Int Value::asInt() const {
switch (type_) {
case intValue:
JSON_ASSERT_MESSAGE(isInt(), "LargestInt out of Int range");
return Int(value_.int_);
case uintValue:
JSON_ASSERT_MESSAGE(isInt(), "LargestUInt out of Int range");
return Int(value_.uint_);
case realValue:
JSON_ASSERT_MESSAGE(InRange(value_.real_, minInt, maxInt),
"double out of Int range");
return Int(value_.real_);
case nullValue:
return 0;
case booleanValue:
return value_.bool_ ? 1 : 0;
default:
break;
}
JSON_FAIL_MESSAGE("Value is not convertible to Int.");
}
Value::UInt Value::asUInt() const {
switch (type_) {
case intValue:
JSON_ASSERT_MESSAGE(isUInt(), "LargestInt out of UInt range");
return UInt(value_.int_);
case uintValue:
JSON_ASSERT_MESSAGE(isUInt(), "LargestUInt out of UInt range");
return UInt(value_.uint_);
case realValue:
JSON_ASSERT_MESSAGE(InRange(value_.real_, 0, maxUInt),
"double out of UInt range");
return UInt(value_.real_);
case nullValue:
return 0;
case booleanValue:
return value_.bool_ ? 1 : 0;
default:
break;
}
JSON_FAIL_MESSAGE("Value is not convertible to UInt.");
}
#if defined(JSON_HAS_INT64)
Value::Int64 Value::asInt64() const {
switch (type_) {
case intValue:
return Int64(value_.int_);
case uintValue:
JSON_ASSERT_MESSAGE(isInt64(), "LargestUInt out of Int64 range");
return Int64(value_.uint_);
case realValue:
JSON_ASSERT_MESSAGE(InRange(value_.real_, minInt64, maxInt64),
"double out of Int64 range");
return Int64(value_.real_);
case nullValue:
return 0;
case booleanValue:
return value_.bool_ ? 1 : 0;
default:
break;
}
JSON_FAIL_MESSAGE("Value is not convertible to Int64.");
}
Value::UInt64 Value::asUInt64() const {
switch (type_) {
case intValue:
JSON_ASSERT_MESSAGE(isUInt64(), "LargestInt out of UInt64 range");
return UInt64(value_.int_);
case uintValue:
return UInt64(value_.uint_);
case realValue:
JSON_ASSERT_MESSAGE(InRange(value_.real_, 0, maxUInt64),
"double out of UInt64 range");
return UInt64(value_.real_);
case nullValue:
return 0;
case booleanValue:
return value_.bool_ ? 1 : 0;
default:
break;
}
JSON_FAIL_MESSAGE("Value is not convertible to UInt64.");
}
#endif // if defined(JSON_HAS_INT64)
LargestInt Value::asLargestInt() const {
#if defined(JSON_NO_INT64)
return asInt();
#else
return asInt64();
#endif
}
LargestUInt Value::asLargestUInt() const {
#if defined(JSON_NO_INT64)
return asUInt();
#else
return asUInt64();
#endif
}
double Value::asDouble() const {
switch (type_) {
case intValue:
return static_cast<double>(value_.int_);
case uintValue:
#if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
return static_cast<double>(value_.uint_);
#else // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
return integerToDouble(value_.uint_);
#endif // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
case realValue:
return value_.real_;
case nullValue:
return 0.0;
case booleanValue:
return value_.bool_ ? 1.0 : 0.0;
default:
break;
}
JSON_FAIL_MESSAGE("Value is not convertible to double.");
}
float Value::asFloat() const {
switch (type_) {
case intValue:
return static_cast<float>(value_.int_);
case uintValue:
#if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
return static_cast<float>(value_.uint_);
#else // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
// This can fail (silently?) if the value is bigger than MAX_FLOAT.
return static_cast<float>(integerToDouble(value_.uint_));
#endif // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
case realValue:
return static_cast<float>(value_.real_);
case nullValue:
return 0.0;
case booleanValue:
return value_.bool_ ? 1.0f : 0.0f;
default:
break;
}
JSON_FAIL_MESSAGE("Value is not convertible to float.");
}
bool Value::asBool() const {
switch (type_) {
case booleanValue:
return value_.bool_;
case nullValue:
return false;
case intValue:
return value_.int_ ? true : false;
case uintValue:
return value_.uint_ ? true : false;
case realValue:
// This is kind of strange. Not recommended.
return (value_.real_ != 0.0) ? true : false;
default:
break;
}
JSON_FAIL_MESSAGE("Value is not convertible to bool.");
}
bool Value::isConvertibleTo(ValueType other) const {
switch (other) {
case nullValue:
return (isNumeric() && asDouble() == 0.0) ||
(type_ == booleanValue && value_.bool_ == false) ||
(type_ == stringValue && asString().empty()) ||
(type_ == arrayValue && value_.map_->size() == 0) ||
(type_ == objectValue && value_.map_->size() == 0) ||
type_ == nullValue;
case intValue:
return isInt() ||
(type_ == realValue && InRange(value_.real_, minInt, maxInt)) ||
type_ == booleanValue || type_ == nullValue;
case uintValue:
return isUInt() ||
(type_ == realValue && InRange(value_.real_, 0, maxUInt)) ||
type_ == booleanValue || type_ == nullValue;
case realValue:
return isNumeric() || type_ == booleanValue || type_ == nullValue;
case booleanValue:
return isNumeric() || type_ == booleanValue || type_ == nullValue;
case stringValue:
return isNumeric() || type_ == booleanValue || type_ == stringValue ||
type_ == nullValue;
case arrayValue:
return type_ == arrayValue || type_ == nullValue;
case objectValue:
return type_ == objectValue || type_ == nullValue;
}
JSON_ASSERT_UNREACHABLE;
return false;
}
/// Number of values in array or object
ArrayIndex Value::size() const {
switch (type_) {
case nullValue:
case intValue:
case uintValue:
case realValue:
case booleanValue:
case stringValue:
return 0;
case arrayValue: // size of the array is highest index + 1
if (!value_.map_->empty()) {
ObjectValues::const_iterator itLast = value_.map_->end();
--itLast;
return (*itLast).first.index() + 1;
}
return 0;
case objectValue:
return ArrayIndex(value_.map_->size());
}
JSON_ASSERT_UNREACHABLE;
return 0; // unreachable;
}
bool Value::empty() const {
if (isNull() || isArray() || isObject())
return size() == 0u;
else
return false;
}
Value::operator bool() const { return ! isNull(); }
void Value::clear() {
JSON_ASSERT_MESSAGE(type_ == nullValue || type_ == arrayValue ||
type_ == objectValue,
"in Json::Value::clear(): requires complex value");
start_ = 0;
limit_ = 0;
switch (type_) {
case arrayValue:
case objectValue:
value_.map_->clear();
break;
default:
break;
}
}
void Value::resize(ArrayIndex newSize) {
JSON_ASSERT_MESSAGE(type_ == nullValue || type_ == arrayValue,
"in Json::Value::resize(): requires arrayValue");
if (type_ == nullValue)
*this