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mistserver/lib/json.cpp

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/// \file json.cpp Holds all JSON-related code.
#include "json.h"
#include "bitfields.h"
#include "defines.h"
#include <arpa/inet.h> //for htonl
#include <fstream>
#include <sstream>
#include <stdint.h> //for uint64_t
#include <stdlib.h>
#include <string.h> //for memcpy
/// Construct from a root Value to iterate over.
JSON::Iter::Iter(Value &root){
myType = root.myType;
i = 0;
r = &root;
if (!root.size()){myType = JSON::EMPTY;}
if (myType == JSON::ARRAY){aIt = root.arrVal.begin();}
if (myType == JSON::OBJECT){oIt = root.objVal.begin();}
}
/// Dereferences into a Value reference.
/// If invalid iterator, returns an empty reference and prints a warning message.
JSON::Value &JSON::Iter::operator*() const{
if (myType == JSON::ARRAY && aIt != r->arrVal.end()){return **aIt;}
if (myType == JSON::OBJECT && oIt != r->objVal.end()){return *(oIt->second);}
static JSON::Value error;
WARN_MSG("Dereferenced invalid JSON iterator");
return error;
}
/// Dereferences into a Value reference.
/// If invalid iterator, returns an empty reference and prints a warning message.
JSON::Value *JSON::Iter::operator->() const{
return &(operator*());
}
/// True if not done iterating.
JSON::Iter::operator bool() const{
return ((myType == JSON::ARRAY && aIt != r->arrVal.end()) ||
(myType == JSON::OBJECT && oIt != r->objVal.end()));
}
/// Go to next iteration.
JSON::Iter &JSON::Iter::operator++(){
if (*this){
++i;
if (myType == JSON::ARRAY){++aIt;}
if (myType == JSON::OBJECT){++oIt;}
}
return *this;
}
/// Return the name of the current indice.
const std::string &JSON::Iter::key() const{
if (myType == JSON::OBJECT && *this){return oIt->first;}
static const std::string empty;
WARN_MSG("Got key from invalid JSON iterator");
return empty;
}
/// Return the number of the current indice.
uint32_t JSON::Iter::num() const{
return i;
}
/// Delete the current indice from the parent JSON::Value.
void JSON::Iter::remove(){
if (*this){
if (myType == JSON::ARRAY){
r->removeMember(aIt);
return;
}
if (myType == JSON::OBJECT){
r->removeMember(oIt);
return;
}
}
}
/// Construct from a root Value to iterate over.
JSON::ConstIter::ConstIter(const Value &root){
myType = root.myType;
i = 0;
r = &root;
if (!root.size()){myType = JSON::EMPTY;}
if (myType == JSON::ARRAY){aIt = root.arrVal.begin();}
if (myType == JSON::OBJECT){oIt = root.objVal.begin();}
}
/// Dereferences into a Value reference.
/// If invalid iterator, returns an empty reference and prints a warning message.
const JSON::Value &JSON::ConstIter::operator*() const{
if (myType == JSON::ARRAY && aIt != r->arrVal.end()){return **aIt;}
if (myType == JSON::OBJECT && oIt != r->objVal.end()){return *(oIt->second);}
static JSON::Value error;
WARN_MSG("Dereferenced invalid JSON iterator");
return error;
}
/// Dereferences into a Value reference.
/// If invalid iterator, returns an empty reference and prints a warning message.
const JSON::Value *JSON::ConstIter::operator->() const{
return &(operator*());
}
/// True if not done iterating.
JSON::ConstIter::operator bool() const{
return ((myType == JSON::ARRAY && aIt != r->arrVal.end()) ||
(myType == JSON::OBJECT && oIt != r->objVal.end()));
}
/// Go to next iteration.
JSON::ConstIter &JSON::ConstIter::operator++(){
if (*this){
++i;
if (myType == JSON::ARRAY){++aIt;}
if (myType == JSON::OBJECT){++oIt;}
}
return *this;
}
/// Return the name of the current indice.
const std::string &JSON::ConstIter::key() const{
if (myType == JSON::OBJECT && *this){return oIt->first;}
static const std::string empty;
WARN_MSG("Got key from invalid JSON iterator");
return empty;
}
/// Return the number of the current indice.
uint32_t JSON::ConstIter::num() const{
return i;
}
static inline char c2hex(char c){
if (c >= '0' && c <= '9') return c - '0';
if (c >= 'a' && c <= 'f') return c - 'a' + 10;
if (c >= 'A' && c <= 'F') return c - 'A' + 10;
return 0;
}
static inline char hex2c(char c){
if (c < 10){return '0' + c;}
if (c < 16){return 'A' + (c - 10);}
return '0';
}
static std::string UTF8(uint32_t c){
std::string r;
if (c <= 0x7F){
r.append(1, c);
return r;
}
if (c <= 0x7FF){
r.append(1, 0xC0 | (c >> 6));
r.append(1, 0x80 | (c & 0x3F));
return r;
}
if (c <= 0x7FF){
r.append(1, 0xC0 | (c >> 12));
r.append(1, 0x80 | ((c >> 6) & 0x3F));
r.append(1, 0x80 | (c & 0x3F));
return r;
}
r.append(1, 0xC0 | (c >> 18));
r.append(1, 0x80 | ((c >> 12) & 0x3F));
r.append(1, 0x80 | ((c >> 6) & 0x3F));
r.append(1, 0x80 | (c & 0x3F));
return r;
}
static std::string read_string(char separator, std::istream &fromstream){
std::string out;
bool escaped = false;
uint32_t fullChar = 0;
while (fromstream.good()){
char c;
fromstream.get(c);
if (!escaped && c == '\\'){
escaped = true;
continue;
}
if (escaped){
if (fullChar && c != 'u'){
out += UTF8(fullChar >> 16);
fullChar = 0;
}
switch (c){
case 'b': out += '\b'; break;
case '\\': out += '\\'; break;
case 'f': out += '\f'; break;
case 'n': out += '\n'; break;
case 'r': out += '\r'; break;
case 't': out += '\t'; break;
case 'x':
char d1, d2;
fromstream.get(d1);
fromstream.get(d2);
out.append(1, (c2hex(d2) + (c2hex(d1) << 4)));
break;
case 'u':{
char d1, d2, d3, d4;
fromstream.get(d1);
fromstream.get(d2);
fromstream.get(d3);
fromstream.get(d4);
uint32_t tmpChar = (c2hex(d4) + (c2hex(d3) << 4) + (c2hex(d2) << 8) + (c2hex(d1) << 16));
if (fullChar && (tmpChar < 0xDC00 || tmpChar > 0xDFFF)){
// not a low surrogate - handle high surrogate separately!
out += UTF8(fullChar >> 16);
fullChar = 0;
}
fullChar |= tmpChar;
if (fullChar >= 0xD800 && fullChar <= 0xDBFF){
// possibly high surrogate! Read next characters before handling...
fullChar <<= 16; // save as high surrogate
}else{
out += UTF8(fullChar);
fullChar = 0;
}
break;
}
default: out.append(1, c); break;
}
escaped = false;
}else{
if (fullChar){
out += UTF8(fullChar >> 16);
fullChar = 0;
}
if (c == separator){return out;}
out.append(1, c);
}
}
if (fullChar){
out += UTF8(fullChar >> 16);
fullChar = 0;
}
return out;
}
static std::string UTF16(uint32_t c){
if (c > 0xFFFF){
c -= 0x010000;
return UTF16(0xD800 + ((c >> 10) & 0x3FF)) + UTF16(0xDC00 + (c & 0x3FF));
}
std::string ret = "\\u";
ret += hex2c((c >> 12) & 0xf);
ret += hex2c((c >> 8) & 0xf);
ret += hex2c((c >> 4) & 0xf);
ret += hex2c(c & 0xf);
return ret;
}
std::string JSON::string_escape(const std::string &val){
std::string out = "\"";
for (size_t i = 0; i < val.size(); ++i){
const char &c = val.data()[i];
switch (c){
case '"': out += "\\\""; break;
case '\\': out += "\\\\"; break;
case '\n': out += "\\n"; break;
case '\b': out += "\\b"; break;
case '\f': out += "\\f"; break;
case '\r': out += "\\r"; break;
case '\t': out += "\\t"; break;
default:
if (c < 32 || c > 126){
// we assume our data is UTF-8 encoded internally.
// JavaScript expects UTF-16, so if we recognize a valid UTF-8 sequence, we turn it into
// UTF-16 for JavaScript. Anything else is escaped as a single character UTF-16 escape.
if ((c & 0xC0) == 0xC0){
// possible UTF-8 sequence
// check for 2-byte sequence
if (((c & 0xE0) == 0XC0) && (i + 1 < val.size()) &&
((val.data()[i + 1] & 0xC0) == 0x80)){
// valid 2-byte sequence
out += UTF16(((c & 0x1F) << 6) | (val.data()[i + 1] & 0x3F));
i += 1;
break;
}
// check for 3-byte sequence
if (((c & 0xF0) == 0XE0) && (i + 2 < val.size()) &&
((val.data()[i + 1] & 0xC0) == 0x80) && ((val.data()[i + 2] & 0xC0) == 0x80)){
// valid 3-byte sequence
out += UTF16(((c & 0x1F) << 12) | ((val.data()[i + 1] & 0x3F) << 6) |
(val.data()[i + 2] & 0x3F));
i += 2;
break;
}
// check for 4-byte sequence
if (((c & 0xF8) == 0XF0) && (i + 3 < val.size()) &&
((val.data()[i + 1] & 0xC0) == 0x80) && ((val.data()[i + 2] & 0xC0) == 0x80) &&
((val.data()[i + 3] & 0xC0) == 0x80)){
// valid 4-byte sequence
out += UTF16(((c & 0x1F) << 18) | ((val.data()[i + 1] & 0x3F) << 12) |
((val.data()[i + 2] & 0x3F) << 6) | (val.data()[i + 3] & 0x3F));
i += 3;
break;
}
}
// Anything else, we encode as a single UTF-16 character.
out += "\\u00";
out += hex2c((val.data()[i] >> 4) & 0xf);
out += hex2c(val.data()[i] & 0xf);
}else{
out += val.data()[i];
}
break;
}
}
out += "\"";
return out;
}
/// Skips an std::istream forward until any of the following characters is seen: ,]}
static void skipToEnd(std::istream &fromstream){
while (fromstream.good()){
char peek = fromstream.peek();
if (peek == ','){return;}
if (peek == ']'){return;}
if (peek == '}'){return;}
peek = fromstream.get();
}
}
/// Sets this JSON::Value to null;
JSON::Value::Value(){
null();
}
/// Sets this JSON::Value to null
JSON::Value::~Value(){
null();
}
JSON::Value::Value(const Value &rhs){
null();
*this = rhs;
}
/// Sets this JSON::Value to read from this position in the std::istream
JSON::Value::Value(std::istream &fromstream){
null();
bool reading_object = false;
bool reading_array = false;
bool negative = false;
bool stop = false;
while (!stop && fromstream.good()){
int c = fromstream.peek();
switch (c){
case '{':
reading_object = true;
c = fromstream.get();
myType = OBJECT;
break;
case '[':{
reading_array = true;
c = fromstream.get();
myType = ARRAY;
Value tmp = JSON::Value(fromstream);
if (tmp.myType != EMPTY){append(tmp);}
break;
}
case '\'':
case '"':
c = fromstream.get();
if (!reading_object){
myType = STRING;
strVal = read_string(c, fromstream);
stop = true;
}else{
std::string tmpstr = read_string(c, fromstream);
(*this)[tmpstr] = JSON::Value(fromstream);
}
break;
case '-':
c = fromstream.get();
negative = true;
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
c = fromstream.get();
if (myType != INTEGER && myType != DOUBLE){myType = INTEGER;}
if (myType == INTEGER){
intVal *= 10;
intVal += c - '0';
}else{
dblDivider *= 10;
dblVal += ((double)((c - '0')) / dblDivider);
}
break;
case '.':
c = fromstream.get();
myType = DOUBLE;
if (negative){
dblVal = -intVal;
dblDivider = -1;
}else{
dblVal = intVal;
dblDivider = 1;
}
break;
case ',':
if (!reading_object && !reading_array){
stop = true;
break;
}
c = fromstream.get();
if (reading_array){append(JSON::Value(fromstream));}
break;
case '}':
if (reading_object){c = fromstream.get();}
stop = true;
break;
case ']':
if (reading_array){c = fromstream.get();}
stop = true;
break;
case 't':
case 'T':
skipToEnd(fromstream);
myType = BOOL;
intVal = 1;
stop = true;
break;
case 'f':
case 'F':
skipToEnd(fromstream);
myType = BOOL;
intVal = 0;
stop = true;
break;
case 'n':
case 'N':
skipToEnd(fromstream);
myType = EMPTY;
stop = true;
break;
default:
c = fromstream.get(); // ignore this character
continue;
break;
}
}
if (negative){intVal *= -1;}
}
/// Sets this JSON::Value to the given string.
JSON::Value::Value(const std::string &val){
myType = STRING;
strVal = val;
intVal = 0;
}
/// Sets this JSON::Value to the given string.
JSON::Value::Value(const char *val){
myType = STRING;
strVal = val;
intVal = 0;
}
/// Sets this JSON::Value to the given integer.
JSON::Value::Value(uint32_t val){
myType = INTEGER;
intVal = val;
}
/// Sets this JSON::Value to the given integer.
JSON::Value::Value(uint64_t val){
myType = INTEGER;
intVal = val;
}
/// Sets this JSON::Value to the given integer.
JSON::Value::Value(int32_t val){
myType = INTEGER;
intVal = val;
}
/// Sets this JSON::Value to the given integer.
JSON::Value::Value(int64_t val){
myType = INTEGER;
intVal = val;
}
/// Sets this JSON::Value to the given double.
JSON::Value::Value(double val){
myType = DOUBLE;
dblVal = val;
}
/// Sets this JSON::Value to the given integer.
JSON::Value::Value(bool val){
myType = BOOL;
intVal = (val ? 1 : 0);
}
/// Compares a JSON::Value to another for equality.
bool JSON::Value::operator==(const JSON::Value &rhs) const{
if (myType != rhs.myType){return false;}
if (myType == INTEGER || myType == BOOL){return intVal == rhs.intVal;}
if (myType == DOUBLE){return dblVal == rhs.dblVal;}
if (myType == STRING){return strVal == rhs.strVal;}
if (myType == EMPTY){return true;}
if (size() != rhs.size()){return false;}
if (myType == OBJECT){
jsonForEachConst(*this, it){
if (!rhs.isMember(it.key()) || *it != rhs[it.key()]){return false;}
}
return true;
}
if (myType == ARRAY){
jsonForEachConst(*this, it){
if (*it != rhs[it.num()]){return false;}
}
return true;
}
return true;
}
/// Compares a JSON::Value to another for equality.
bool JSON::Value::operator!=(const JSON::Value &rhs) const{
return !((*this) == rhs);
}
bool JSON::Value::compareExcept(const Value &rhs, const std::set<std::string> &skip) const{
if (myType == OBJECT){
jsonForEachConst(*this, it){
if (skip.count(it.key())){continue;}
if (!rhs.isMember(it.key()) || !(*it).compareExcept(rhs[it.key()], skip)){return false;}
}
jsonForEachConst(rhs, it){
if (skip.count(it.key())){continue;}
if (!(*this).isMember(it.key())){return false;}
}
return true;
}
if (myType == ARRAY){
if (size() != rhs.size()){return false;}
jsonForEachConst(*this, it){
if (!(*it).compareExcept(rhs[it.num()], skip)){return false;}
}
return true;
}
return ((*this) == rhs);
}
bool JSON::Value::compareOnly(const Value &rhs, const std::set<std::string> &check) const{
if (myType == OBJECT){
jsonForEachConst(*this, it){
if (!check.count(it.key())){continue;}
if (!rhs.isMember(it.key()) || !(*it).compareOnly(rhs[it.key()], check)){return false;}
}
jsonForEachConst(rhs, it){
if (!check.count(it.key())){continue;}
if (!(*this).isMember(it.key())){return false;}
}
return true;
}
if (myType == ARRAY){
if (size() != rhs.size()){return false;}
jsonForEachConst(*this, it){
if (!(*it).compareOnly(rhs[it.num()], check)){return false;}
}
return true;
}
return ((*this) == rhs);
}
/// Completely clears the contents of this value,
/// changing its type to NULL in the process.
void JSON::Value::null(){
shrink(0);
strVal.clear();
intVal = 0;
dblVal = 0;
dblDivider = 1;
myType = EMPTY;
}
/// Assigns this JSON::Value to the given JSON::Value, skipping given member recursively.
JSON::Value &JSON::Value::assignFrom(const Value &rhs, const std::set<std::string> &skip){
null();
myType = rhs.myType;
if (myType == STRING){strVal = rhs.strVal;}
if (myType == BOOL || myType == INTEGER){intVal = rhs.intVal;}
if (myType == DOUBLE){dblVal = rhs.dblVal;}
if (myType == OBJECT){
jsonForEachConst(rhs, i){
if (!skip.count(i.key())){
JSON::Value tmp;
tmp.assignFrom(*i, skip);
(*this)[i.key()] = tmp;
}
}
}
if (myType == ARRAY){
jsonForEachConst(rhs, i){
JSON::Value tmp;
tmp.assignFrom(*i, skip);
append(tmp);
}
}
return *this;
}
/// Sets this JSON::Value to be equal to the given JSON::Value.
JSON::Value &JSON::Value::operator=(const JSON::Value &rhs){
null();
myType = rhs.myType;
if (myType == STRING){strVal = rhs.strVal;}
if (myType == BOOL || myType == INTEGER){intVal = rhs.intVal;}
if (myType == DOUBLE){dblVal = rhs.dblVal;}
if (myType == OBJECT){
jsonForEachConst(rhs, i){(*this)[i.key()] = *i;}
}
if (myType == ARRAY){
jsonForEachConst(rhs, i){append(*i);}
}
return *this;
}
/// Sets this JSON::Value to the given boolean.
JSON::Value &JSON::Value::operator=(const bool &rhs){
null();
myType = BOOL;
intVal = (rhs ? 1 : 0);
return *this;
}
/// Sets this JSON::Value to the given string.
JSON::Value &JSON::Value::operator=(const std::string &rhs){
null();
myType = STRING;
strVal = rhs;
return *this;
}
/// Sets this JSON::Value to the given string.
JSON::Value &JSON::Value::operator=(const char *rhs){
return ((*this) = (std::string)rhs);
}
/// Sets this JSON::Value to the given integer.
JSON::Value &JSON::Value::operator=(const int64_t &rhs){
null();
myType = INTEGER;
intVal = rhs;
return *this;
}
/// Sets this JSON::Value to the given integer.
JSON::Value &JSON::Value::operator=(const int32_t &rhs){
return ((*this) = (int64_t)rhs);
}
/// Sets this JSON::Value to the given integer.
JSON::Value &JSON::Value::operator=(const uint64_t &rhs){
return ((*this) = (int64_t)rhs);
}
/// Sets this JSON::Value to the given double.
JSON::Value &JSON::Value::operator=(const double &rhs){
null();
myType = DOUBLE;
dblVal = rhs;
return *this;
}
/// Sets this JSON::Value to the given integer.
JSON::Value &JSON::Value::operator=(const uint32_t &rhs){
return ((*this) = (int64_t)rhs);
}
/// Automatic conversion to long long int - returns 0 if not convertable.
JSON::Value::operator int64_t() const{
if (myType == INTEGER){return intVal;}
if (myType == DOUBLE){return (long long int)dblVal;}
if (myType == STRING){return atoll(strVal.c_str());}
return 0;
}
/// Automatic conversion to double - returns 0 if not convertable.
JSON::Value::operator double() const{
if (myType == INTEGER){return (double)intVal;}
if (myType == DOUBLE){return dblVal;}
if (myType == STRING){return atof(strVal.c_str());}
return 0;
}
/// Automatic conversion to std::string.
/// Returns the raw string value if available, otherwise calls toString().
JSON::Value::operator std::string() const{
if (myType == STRING){return strVal;}
if (myType == EMPTY){return "";}
return toString();
}
/// Automatic conversion to bool.
/// Returns true if there is anything meaningful stored into this value.
JSON::Value::operator bool() const{
if (myType == STRING){return strVal != "";}
if (myType == DOUBLE){return dblVal != 0;}
if (myType == INTEGER || myType == BOOL){return intVal != 0;}
if (myType == OBJECT || myType == ARRAY){return size() > 0;}
return false; // Empty or 'unimplemented? should never happen...'
}
/// Explicit conversion to std::string.
std::string JSON::Value::asString() const{
return (std::string) * this;
}
/// Explicit conversion to long long int.
int64_t JSON::Value::asInt() const{
return (int64_t) * this;
}
/// Explicit conversion to double.
const double JSON::Value::asDouble() const{
return (double)*this;
}
/// Explicit conversion to bool.
bool JSON::Value::asBool() const{
return (bool)*this;
}
/// Explicit conversion to std::string reference.
/// Returns a direct reference for string type JSON::Value objects,
/// but a reference to a static empty string otherwise.
/// \warning Only save to use when the JSON::Value is a string type!
const std::string &JSON::Value::asStringRef() const{
static std::string ugly_buffer;
if (myType == STRING){return strVal;}
return ugly_buffer;
}
/// Explicit conversion to c-string.
/// Returns a direct reference for string type JSON::Value objects,
/// a reference to an empty string otherwise.
/// \warning Only save to use when the JSON::Value is a string type!
const char *JSON::Value::c_str() const{
if (myType == STRING){return strVal.c_str();}
return "";
}
/// Retrieves or sets the JSON::Value at this position in the object.
/// Converts destructively to object if not already an object.
JSON::Value &JSON::Value::operator[](const std::string &i){
if (myType != OBJECT){
null();
myType = OBJECT;
}
Value *pntr = objVal[i];
if (!pntr){
objVal[i] = new JSON::Value();
pntr = objVal[i];
}
return *pntr;
}
/// Retrieves or sets the JSON::Value at this position in the object.
/// Converts destructively to object if not already an object.
JSON::Value &JSON::Value::operator[](const char *i){
if (myType != OBJECT){
null();
myType = OBJECT;
}
Value *pntr = objVal[i];
if (!pntr){
objVal[i] = new JSON::Value();
pntr = objVal[i];
}
return *pntr;
}
/// Retrieves or sets the JSON::Value at this position in the array.
/// Converts destructively to array if not already an array.
JSON::Value &JSON::Value::operator[](uint32_t i){
static JSON::Value empty;
if (myType != ARRAY){
null();
myType = ARRAY;
}
while (i >= arrVal.size()){append(empty);}
return *arrVal[i];
}
/// Retrieves the JSON::Value at this position in the object.
/// Fails horribly if that values does not exist.
const JSON::Value &JSON::Value::operator[](const std::string &i) const{
return *objVal.find(i)->second;
}
/// Retrieves the JSON::Value at this position in the object.
/// Fails horribly if that values does not exist.
const JSON::Value &JSON::Value::operator[](const char *i) const{
return *objVal.find(i)->second;
}
/// Retrieves the JSON::Value at this position in the array.
/// Fails horribly if that values does not exist.
const JSON::Value &JSON::Value::operator[](uint32_t i) const{
return *arrVal[i];
}
/// Packs to a std::string for transfer over the network.
/// If the object is a container type, this function will call itself recursively and contain all
/// contents. As a side effect, this function clear the internal buffer of any object-types.
std::string JSON::Value::toPacked() const{
std::string r;
if (isInt() || isNull() || isBool()){
r += 0x01;
uint64_t numval = intVal;
r += *(((char *)&numval) + 7);
r += *(((char *)&numval) + 6);
r += *(((char *)&numval) + 5);
r += *(((char *)&numval) + 4);
r += *(((char *)&numval) + 3);
r += *(((char *)&numval) + 2);
r += *(((char *)&numval) + 1);
r += *(((char *)&numval));
}
if (isString()){
r += 0x02;
r += strVal.size() / (256 * 256 * 256);
r += strVal.size() / (256 * 256);
r += strVal.size() / 256;
r += strVal.size() % 256;
r += strVal;
}
if (isObject()){
r += 0xE0;
if (objVal.size() > 0){
jsonForEachConst(*this, i){
if (i.key().size() > 0){
r += i.key().size() / 256;
r += i.key().size() % 256;
r += i.key();
r += i->toPacked();
}
}
}
r += (char)0x0;
r += (char)0x0;
r += (char)0xEE;
}
if (isArray()){
r += 0x0A;
jsonForEachConst(*this, i){r += i->toPacked();}
r += (char)0x0;
r += (char)0x0;
r += (char)0xEE;
}
// Note: Will output integers for doubles.
// This is intentional, as DTSC packets cannot contain doubles.
if (isDouble()){
r += 0x01;
uint64_t numval = intVal;
r += *(((char *)&numval) + 7);
r += *(((char *)&numval) + 6);
r += *(((char *)&numval) + 5);
r += *(((char *)&numval) + 4);
r += *(((char *)&numval) + 3);
r += *(((char *)&numval) + 2);
r += *(((char *)&numval) + 1);
r += *(((char *)&numval));
}
return r;
}
// toPacked
/// Packs and transfers over the network.
/// If the object is a container type, this function will call itself recursively for all contents.
void JSON::Value::sendTo(Socket::Connection &socket) const{
if (isInt() || isNull() || isBool()){
socket.SendNow("\001", 1);
int tmpHalf = htonl((int)(intVal >> 32));
socket.SendNow((char *)&tmpHalf, 4);
tmpHalf = htonl((int)(intVal & 0xFFFFFFFF));
socket.SendNow((char *)&tmpHalf, 4);
return;
}
if (isString()){
socket.SendNow("\002", 1);
int tmpVal = htonl((int)strVal.size());
socket.SendNow((char *)&tmpVal, 4);
socket.SendNow(strVal);
return;
}
if (isObject()){
if (isMember("trackid") && isMember("time")){
unsigned int trackid = objVal.find("trackid")->second->asInt();
long long time = objVal.find("time")->second->asInt();
unsigned int size = 16;
if (objVal.size() > 0){
jsonForEachConst(*this, i){
if (i.key().size() > 0 && i.key() != "trackid" && i.key() != "time" &&
i.key() != "datatype"){
size += 2 + i.key().size() + i->packedSize();
}
}
}
socket.SendNow("DTP2", 4);
size = htonl(size);
socket.SendNow((char *)&size, 4);
trackid = htonl(trackid);
socket.SendNow((char *)&trackid, 4);
int tmpHalf = htonl((int)(time >> 32));
socket.SendNow((char *)&tmpHalf, 4);
tmpHalf = htonl((int)(time & 0xFFFFFFFF));
socket.SendNow((char *)&tmpHalf, 4);
socket.SendNow("\340", 1);
if (objVal.size() > 0){
jsonForEachConst(*this, i){
if (i.key().size() > 0 && i.key() != "trackid" && i.key() != "time" &&
i.key() != "datatype"){
char sizebuffer[2] ={0, 0};
sizebuffer[0] = (i.key().size() >> 8) & 0xFF;
sizebuffer[1] = i.key().size() & 0xFF;
socket.SendNow(sizebuffer, 2);
socket.SendNow(i.key());
i->sendTo(socket);
}
}
}
socket.SendNow("\000\000\356", 3);
return;
}
if (isMember("tracks")){
socket.SendNow("DTSC", 4);
unsigned int size = htonl(packedSize());
socket.SendNow((char *)&size, 4);
}
socket.SendNow("\340", 1);
if (objVal.size() > 0){
jsonForEachConst(*this, i){
if (i.key().size() > 0){
char sizebuffer[2] ={0, 0};
sizebuffer[0] = (i.key().size() >> 8) & 0xFF;
sizebuffer[1] = i.key().size() & 0xFF;
socket.SendNow(sizebuffer, 2);
socket.SendNow(i.key());
i->sendTo(socket);
}
}
}
socket.SendNow("\000\000\356", 3);
return;
}
if (isArray()){
socket.SendNow("\012", 1);
jsonForEachConst(*this, i){i->sendTo(socket);}
socket.SendNow("\000\000\356", 3);
return;
}
}// sendTo
/// Returns the packed size of this Value.
uint64_t JSON::Value::packedSize() const{
if (isInt() || isNull() || isBool()){return 9;}
if (isString()){return 5 + strVal.size();}
if (isObject()){
uint64_t ret = 4;
if (objVal.size() > 0){
jsonForEachConst(*this, i){
if (i.key().size() > 0){ret += 2 + i.key().size() + i->packedSize();}
}
}
return ret;
}
if (isArray()){
uint64_t ret = 4;
jsonForEachConst(*this, i){ret += i->packedSize();}
return ret;
}
return 0;
}// packedSize
/// Pre-packs any object-type JSON::Value to a std::string for transfer over the network, including
/// proper DTMI header. Non-object-types will print an error. The internal buffer is guaranteed to
/// be up-to-date after this function is called.
void JSON::Value::netPrepare(){
if (myType != OBJECT){
ERROR_MSG("Only objects may be netpacked!");
return;
}
std::string packed = toPacked();
// insert proper header for this type of data
int32_t packID = -1;
int64_t time = (*this)["time"].asInt();
std::string dataType;
if (isMember("datatype") || isMember("trackid")){
dataType = (*this)["datatype"].asString();
if (isMember("trackid")){
packID = (*this)["trackid"].asInt();
}else{
if ((*this)["datatype"].asString() == "video"){packID = 1;}
if ((*this)["datatype"].asString() == "audio"){packID = 2;}
if ((*this)["datatype"].asString() == "meta"){packID = 3;}
// endmark and the likes...
if (packID == -1){packID = 0;}
}
removeMember("time");
if (packID != 0){removeMember("datatype");}
removeMember("trackid");
packed = toPacked();
(*this)["time"] = time;
(*this)["datatype"] = dataType;
(*this)["trackid"] = packID;
strVal.resize(packed.size() + 20);
memcpy((void *)strVal.c_str(), "DTP2", 4);
}else{
packID = -1;
strVal.resize(packed.size() + 8);
memcpy((void *)strVal.c_str(), "DTSC", 4);
}
// insert the packet length at bytes 4-7
size_t size = packed.size();
if (packID != -1){size += 12;}
size = htonl(size);
memcpy((void *)(strVal.c_str() + 4), (void *)&size, 4);
// copy the rest of the string
if (packID == -1){
memcpy((void *)(strVal.c_str() + 8), packed.c_str(), packed.size());
return;
}
packID = htonl(packID);
memcpy((void *)(strVal.c_str() + 8), (void *)&packID, 4);
int tmpHalf = htonl((int)(time >> 32));
memcpy((void *)(strVal.c_str() + 12), (void *)&tmpHalf, 4);
tmpHalf = htonl((int)(time & 0xFFFFFFFF));
memcpy((void *)(strVal.c_str() + 16), (void *)&tmpHalf, 4);
memcpy((void *)(strVal.c_str() + 20), packed.c_str(), packed.size());
}
/// Packs any object-type JSON::Value to a std::string for transfer over the network, including
/// proper DTMI header. Non-object-types will print an error and return an empty string. This
/// function returns a reference to an internal buffer where the prepared data is kept. The internal
/// buffer is *not* made stale if any changes occur inside the object - subsequent calls to
/// toPacked() will clear the buffer, calls to netPrepare will guarantee it is up-to-date.
std::string &JSON::Value::toNetPacked(){
static std::string emptystring;
// check if this is legal
if (myType != OBJECT){
INFO_MSG("Ignored attempt to netpack a non-object.");
return emptystring;
}
// if sneaky storage doesn't contain correct data, re-calculate it
if (strVal.size() == 0 || strVal[0] != 'D' || strVal[1] != 'T'){netPrepare();}
return strVal;
}
/// Converts this JSON::Value to valid JSON notation and returns it.
/// Makes absolutely no attempts to pretty-print anything. :-)
std::string JSON::Value::toString() const{
switch (myType){
case INTEGER:{
std::stringstream st;
st << intVal;
return st.str();
break;
}
case DOUBLE:{
std::stringstream st;
st.precision(10);
st << std::fixed << dblVal;
return st.str();
break;
}
case BOOL:{
if (intVal != 0){
return "true";
}else{
return "false";
}
break;
}
case STRING:{
return JSON::string_escape(strVal);
break;
}
case ARRAY:{
std::string tmp = "[";
if (arrVal.size() > 0){
jsonForEachConst(*this, i){
tmp += i->toString();
if (i.num() + 1 != arrVal.size()){tmp += ",";}
}
}
tmp += "]";
return tmp;
break;
}
case OBJECT:{
std::string tmp2 = "{";
if (objVal.size() > 0){
jsonForEachConst(*this, i){
tmp2 += JSON::string_escape(i.key()) + ":";
tmp2 += i->toString();
if (i.num() + 1 != objVal.size()){tmp2 += ",";}
}
}
tmp2 += "}";
return tmp2;
break;
}
case EMPTY:
default: return "null";
}
return "null"; // should never get here...
}
/// Converts this JSON::Value to valid JSON notation and returns it.
/// Makes an attempt at pretty-printing.
std::string JSON::Value::toPrettyString(size_t indentation) const{
switch (myType){
case INTEGER:{
std::stringstream st;
st << intVal;
return st.str();
break;
}
case DOUBLE:{
std::stringstream st;
st.precision(10);
st << std::fixed << dblVal;
return st.str();
break;
}
case BOOL:{
if (intVal != 0){
return "true";
}else{
return "false";
}
break;
}
case STRING:{
for (uint8_t i = 0; i < 201 && i < strVal.size(); ++i){
if (strVal[i] < 32 || strVal[i] > 126 || strVal.size() > 200){
return "\"" + JSON::Value((int64_t)strVal.size()).asString() + " bytes of data\"";
}
}
return JSON::string_escape(strVal);
break;
}
case ARRAY:{
if (arrVal.size() > 0){
std::string tmp = "[\n" + std::string(indentation + 2, ' ');
jsonForEachConst(*this, i){
tmp += i->toPrettyString(indentation + 2);
if (i.num() + 1 != arrVal.size()){tmp += ", ";}
}
tmp += "\n" + std::string(indentation, ' ') + "]";
return tmp;
}else{
return "[]";
}
break;
}
case OBJECT:{
if (objVal.size() > 0){
bool shortMode = false;
if (size() <= 3 && isMember("len")){shortMode = true;}
std::string tmp2 = "{" + std::string((shortMode ? "" : "\n"));
jsonForEachConst(*this, i){
tmp2 += (shortMode ? std::string("") : std::string(indentation + 2, ' ')) +
JSON::string_escape(i.key()) + ":";
tmp2 += i->toPrettyString(indentation + 2);
if (i.num() + 1 != objVal.size()){tmp2 += "," + std::string((shortMode ? " " : "\n"));}
}
tmp2 += (shortMode ? std::string("") : "\n" + std::string(indentation, ' ')) + "}";
return tmp2;
}else{
return "{}";
}
break;
}
case EMPTY:
default: return "null";
}
return "null"; // should never get here...
}
/// Appends the given value to the end of this JSON::Value array.
/// Turns this value into an array if it is not already one.
void JSON::Value::append(const JSON::Value &rhs){
if (myType != ARRAY){
null();
myType = ARRAY;
}
arrVal.push_back(new JSON::Value(rhs));
}
/// Prepends the given value to the beginning of this JSON::Value array.
/// Turns this value into an array if it is not already one.
void JSON::Value::prepend(const JSON::Value &rhs){
if (myType != ARRAY){
null();
myType = ARRAY;
}
arrVal.push_front(new JSON::Value(rhs));
}
/// For array and object JSON::Value objects, reduces them
/// so they contain at most size elements, throwing away
/// the first elements and keeping the last ones.
/// Does nothing for other JSON::Value types, nor does it
/// do anything if the size is already lower or equal to the
/// given size.
void JSON::Value::shrink(unsigned int size){
while (arrVal.size() > size){
delete arrVal.front();
arrVal.pop_front();
}
while (objVal.size() > size){
delete objVal.begin()->second;
objVal.erase(objVal.begin());
}
}
/// For object JSON::Value objects, removes the member with
/// the given name, if it exists. Has no effect otherwise.
void JSON::Value::removeMember(const std::string &name){
if (objVal.count(name)){
delete objVal[name];
objVal.erase(name);
}
}
void JSON::Value::removeMember(const std::deque<Value *>::iterator &it){
delete (*it);
arrVal.erase(it);
}
void JSON::Value::removeMember(const std::map<std::string, Value *>::iterator &it){
delete it->second;
objVal.erase(it);
}
void JSON::Value::removeNullMembers(){
bool again = true;
while (again){
again = false;
jsonForEach(*this, m){
if (m.key().size() && m->isNull()){
removeMember(m.key());
again = true;
break;
}
}
}
}
/// For object JSON::Value objects, returns true if the
/// given name is a member. Returns false otherwise.
bool JSON::Value::isMember(const std::string &name) const{
return objVal.count(name) > 0;
}
/// Returns true if this object is an integer.
bool JSON::Value::isInt() const{
return (myType == INTEGER);
}
/// Returns true if this object is a double.
bool JSON::Value::isDouble() const{
return (myType == DOUBLE);
}
/// Returns true if this object is a string.
bool JSON::Value::isString() const{
return (myType == STRING);
}
/// Returns true if this object is a bool.
bool JSON::Value::isBool() const{
return (myType == BOOL);
}
/// Returns true if this object is an object.
bool JSON::Value::isObject() const{
return (myType == OBJECT);
}
/// Returns true if this object is an array.
bool JSON::Value::isArray() const{
return (myType == ARRAY);
}
/// Returns true if this object is null.
bool JSON::Value::isNull() const{
return (myType == EMPTY);
}
/// Returns the total of the objects and array size combined.
unsigned int JSON::Value::size() const{
return objVal.size() + arrVal.size();
}
/// Converts a std::string to a JSON::Value.
JSON::Value JSON::fromString(const char *data, uint32_t data_len){
std::string str(data, data_len);
return JSON::fromString(str);
}
/// Converts a std::string to a JSON::Value.
JSON::Value JSON::fromString(const std::string &json){
std::istringstream is(json);
return JSON::Value(is);
}
/// Converts a file to a JSON::Value.
JSON::Value JSON::fromFile(const std::string &filename){
std::ifstream File;
File.open(filename.c_str());
JSON::Value ret(File);
File.close();
return ret;
}
/// Parses a single DTMI type - used recursively by the JSON::fromDTMI functions.
/// This function updates i every call with the new position in the data.
/// \param data The raw data to parse.
/// \param len The size of the raw data.
/// \param i Current parsing position in the raw data (defaults to 0).
/// \returns A single JSON::Value, parsed from the raw data.
JSON::Value JSON::fromDTMI(const char *data, uint64_t len, uint32_t &i){
JSON::Value ret;
fromDTMI(data, len, i, ret);
return ret;
}
/// Parses a single DTMI type - used recursively by the JSON::fromDTMI functions.
/// This function updates i every call with the new position in the data.
/// \param data The raw data to parse.
/// \param len The size of the raw data.
/// \param i Current parsing position in the raw data (defaults to 0).
/// \param ret Will be set to JSON::Value, parsed from the raw data.
void JSON::fromDTMI(const char *data, uint64_t len, uint32_t &i, JSON::Value &ret){
ret.null();
if (i >= len){return;}
switch (data[i]){
case 0x01:{// integer
if (i + 8 >= len){return;}
unsigned char tmpdbl[8];
tmpdbl[7] = data[i + 1];
tmpdbl[6] = data[i + 2];
tmpdbl[5] = data[i + 3];
tmpdbl[4] = data[i + 4];
tmpdbl[3] = data[i + 5];
tmpdbl[2] = data[i + 6];
tmpdbl[1] = data[i + 7];
tmpdbl[0] = data[i + 8];
i += 9; // skip 8(an uint64_t)+1 forwards
ret = *(int64_t *)tmpdbl;
return;
break;
}
case 0x02:{// string
if (i + 4 >= len){return;}
uint32_t tmpi = Bit::btohl(data + i + 1); // set tmpi to UTF-8-long length
std::string tmpstr = std::string(data + i + 5, tmpi); // set the string data
if (i + 4 + tmpi >= len){return;}
i += tmpi + 5; // skip length+size+1 forwards
ret = tmpstr;
return;
break;
}
case 0xFF: // also object
case 0xE0:{// object
++i;
while (data[i] + data[i + 1] != 0 &&
i < len){// while not encountering 0x0000 (we assume 0x0000EE)
if (i + 2 >= len){return;}
uint16_t tmpi = Bit::btohs(data + i); // set tmpi to the UTF-8 length
std::string tmpstr = std::string(data + i + 2, tmpi); // set the string data
i += tmpi + 2; // skip length+size forwards
ret[tmpstr].null();
fromDTMI(
data, len, i,
ret[tmpstr]); // add content, recursively parsed, updating i, setting indice to tmpstr
}
i += 3; // skip 0x0000EE
return;
break;
}
case 0x0A:{// array
++i;
while (data[i] + data[i + 1] != 0 &&
i < len){// while not encountering 0x0000 (we assume 0x0000EE)
JSON::Value tval;
fromDTMI(data, len, i, tval); // add content, recursively parsed, updating i
ret.append(tval);
}
i += 3; // skip 0x0000EE
return;
break;
}
}
FAIL_MSG("Unimplemented DTMI type %hhx, @ %i / %" PRIu64 " - returning.", data[i], i, len);
i += 1;
return;
}// fromOneDTMI
/// Parses a std::string to a valid JSON::Value.
/// This function will find one DTMI object in the string and return it.
void JSON::fromDTMI(const std::string &data, JSON::Value &ret){
uint32_t i = 0;
return fromDTMI(data.c_str(), data.size(), i, ret);
}// fromDTMI
/// Parses a std::string to a valid JSON::Value.
/// This function will find one DTMI object in the string and return it.
JSON::Value JSON::fromDTMI(const std::string &data){
uint32_t i = 0;
return fromDTMI(data.c_str(), data.size(), i);
}// fromDTMI
void JSON::fromDTMI2(const std::string &data, JSON::Value &ret){
uint32_t i = 0;
fromDTMI2(data.c_str(), data.size(), i, ret);
return;
}
JSON::Value JSON::fromDTMI2(const std::string &data){
JSON::Value ret;
uint32_t i = 0;
fromDTMI2(data.c_str(), data.size(), i, ret);
return ret;
}
void JSON::fromDTMI2(const char *data, uint64_t len, uint32_t &i, JSON::Value &ret){
if (len < 13){return;}
uint32_t tid = Bit::btohl(data + i);
uint64_t time = Bit::btohll(data + 4);
i += 12;
fromDTMI(data, len, i, ret);
ret["time"] = time;
ret["trackid"] = tid;
return;
}
JSON::Value JSON::fromDTMI2(const char *data, uint64_t len, uint32_t &i){
JSON::Value ret;
fromDTMI2(data, len, i, ret);
return ret;
}
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