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mistserver/lib/json.cpp

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/// \file json.cpp Holds all JSON-related code.
#include "json.h"
#include "defines.h"
#include <sstream>
#include <fstream>
#include <stdlib.h>
#include <stdint.h> //for uint64_t
#include <string.h> //for memcpy
#include <arpa/inet.h> //for htonl
/// 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.
unsigned int JSON::Iter::num() const{
return i;
}
/// 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.
unsigned int 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 read_string(int separator, std::istream & fromstream) {
std::string out;
bool escaped = false;
while (fromstream.good()) {
char c;
fromstream.get(c);
if (c == '\\') {
escaped = true;
continue;
}
if (escaped) {
switch (c) {
case 'b':
out += '\b';
break;
case 'f':
out += '\f';
break;
case 'n':
out += '\n';
break;
case 'r':
out += '\r';
break;
case 't':
out += '\t';
break;
case 'u': {
char d1, d2, d3, d4;
fromstream.get(d1);
fromstream.get(d2);
fromstream.get(d3);
fromstream.get(d4);
out.append(1, (c2hex(d4) + (c2hex(d3) << 4)));
//We ignore the upper two characters.
// + (c2hex(d2) << 8) + (c2hex(d1) << 16)
break;
}
default:
out.append(1, c);
break;
}
escaped = false;
} else {
if (c == separator) {
return out;
} else {
out.append(1, c);
}
}
}
return out;
}
static std::string string_escape(const std::string val) {
std::string out = "\"";
for (unsigned int i = 0; i < val.size(); ++i) {
switch (val.data()[i]) {
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 (val.data()[i] < 32 || val.data()[i] > 126) {
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();
myType = INTEGER;
intVal *= 10;
intVal += c - '0';
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(long long int val) {
myType = INTEGER;
intVal = val;
}
/// Sets this JSON::Value to the given integer.
JSON::Value::Value(bool val) {
myType = BOOL;
if (val){
intVal = 1;
}else{
intVal = 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 == 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);
}
/// 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;
myType = EMPTY;
}
/// 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 == 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;
if (rhs) intVal = 1;
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 long long int & rhs) {
null();
myType = INTEGER;
intVal = rhs;
return *this;
}
/// Sets this JSON::Value to the given integer.
JSON::Value & JSON::Value::operator=(const int & rhs) {
return ((*this) = (long long int)rhs);
}
/// Sets this JSON::Value to the given integer.
JSON::Value & JSON::Value::operator=(const unsigned int & rhs) {
return ((*this) = (long long int)rhs);
}
/// Automatic conversion to long long int - returns 0 if not convertable.
JSON::Value::operator long long int() const {
if (myType == INTEGER) {
return intVal;
}
if (myType == STRING) {
return atoll(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;
} else {
if (myType == EMPTY) {
return "";
} else {
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 == INTEGER) {
return intVal != 0;
}
if (myType == BOOL) {
return intVal != 0;
}
if (myType == OBJECT) {
return size() > 0;
}
if (myType == ARRAY) {
return size() > 0;
}
if (myType == EMPTY) {
return false;
}
return false; //unimplemented? should never happen...
}
/// Explicit conversion to std::string.
const std::string JSON::Value::asString() const {
return (std::string) * this;
}
/// Explicit conversion to long long int.
const long long int JSON::Value::asInt() const {
return (long long int) * this;
}
/// Explicit conversion to bool.
const 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[](unsigned int 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[](unsigned int 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;
}
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.
unsigned int JSON::Value::packedSize() const {
if (isInt() || isNull() || isBool()) {
return 9;
}
if (isString()) {
return 5 + strVal.size();
}
if (isObject()) {
unsigned int 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()) {
unsigned int 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) {
DEBUG_MSG(DLVL_ERROR, "Only objects may be netpacked!");
return;
}
std::string packed = toPacked();
//insert proper header for this type of data
int packID = -1;
long long unsigned int 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"] = (long long int)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
unsigned int 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 BOOL: {
if (intVal != 0){
return "true";
}else{
return "false";
}
break;
}
case STRING: {
return 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 += 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(int indentation) const {
switch (myType) {
case INTEGER: {
std::stringstream st;
st << intVal;
return st.str();
break;
}
case STRING: {
for (unsigned int i = 0; i < 201 && i < strVal.size(); ++i) {
if (strVal[i] < 32 || strVal[i] > 126 || strVal.size() > 200) {
return "\"" + JSON::Value((long long int)strVal.size()).asString() + " bytes of data\"";
}
}
return 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, ' ')) + 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);
}
}
/// 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 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(std::string json) {
std::istringstream is(json);
return JSON::Value(is);
}
/// Converts a file to a JSON::Value.
JSON::Value JSON::fromFile(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 unsigned char * data, unsigned int len, unsigned int & 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 unsigned char * data, unsigned int len, unsigned int & 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
uint64_t * d = (uint64_t *)tmpdbl;
ret = (long long int) * d;
return;
break;
}
case 0x02: { //string
if (i + 4 >= len) {
return;
}
unsigned int tmpi = data[i + 1] * 256 * 256 * 256 + data[i + 2] * 256 * 256 + data[i + 3] * 256 + data[i + 4]; //set tmpi to UTF-8-long length
std::string tmpstr = std::string((const char *)data + i + 5, (size_t)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;
}
unsigned int tmpi = data[i] * 256 + data[i + 1]; //set tmpi to the UTF-8 length
std::string tmpstr = std::string((const char *)data + i + 2, (size_t)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;
}
}
DEBUG_MSG(DLVL_FAIL, "Unimplemented DTMI type %hhx, @ %i / %i - 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(std::string & data, JSON::Value & ret) {
unsigned int i = 0;
return fromDTMI((const unsigned char *)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(std::string & data) {
unsigned int i = 0;
return fromDTMI((const unsigned char *)data.c_str(), data.size(), i);
} //fromDTMI
void JSON::fromDTMI2(std::string & data, JSON::Value & ret) {
unsigned int i = 0;
fromDTMI2((const unsigned char *)data.c_str(), data.size(), i, ret);
return;
}
JSON::Value JSON::fromDTMI2(std::string & data) {
JSON::Value ret;
unsigned int i = 0;
fromDTMI2((const unsigned char *)data.c_str(), data.size(), i, ret);
return ret;
}
void JSON::fromDTMI2(const unsigned char * data, unsigned int len, unsigned int & i, JSON::Value & ret) {
if (len < 13) {
return;
}
long long int tmpTrackID = ntohl(((int *)(data + i))[0]);
long long int tmpTime = ntohl(((int *)(data + i))[1]);
tmpTime <<= 32;
tmpTime += ntohl(((int *)(data + i))[2]);
i += 12;
fromDTMI(data, len, i, ret);
ret["time"] = tmpTime;
ret["trackid"] = tmpTrackID;
return;
}
JSON::Value JSON::fromDTMI2(const unsigned char * data, unsigned int len, unsigned int & i) {
JSON::Value ret;
fromDTMI2(data, len, i, ret);
return ret;
}
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