size_t DocumentAccessor::length () const {
if (! isArray()) {
return 0;
}
// ok, we have confirmed this is an array
TRI_ASSERT(_current != nullptr);
if (_current != nullptr) {
return TRI_LengthArrayJson(_current);
}
return 0;
}
bool TRI_DeleteArrayJson (TRI_memory_zone_t* zone, TRI_json_t* array, size_t index) {
TRI_ASSERT(TRI_IsArrayJson(array));
size_t const n = TRI_LengthArrayJson(array);
if (index >= n) {
return false;
}
TRI_json_t* element = static_cast<TRI_json_t*>(TRI_AtVector(&array->_value._objects, index));
TRI_ASSERT(element != nullptr);
TRI_DestroyJson(zone, element);
TRI_RemoveVector(&array->_value._objects, index);
return true;
}
double TRI_ToDoubleJson (TRI_json_t const* json, bool& failed) {
TRI_ASSERT(json != nullptr);
failed = false;
switch (json->_type) {
case TRI_JSON_UNUSED:
case TRI_JSON_NULL:
return 0.0;
case TRI_JSON_BOOLEAN:
return (json->_value._boolean ? 1.0 : 0.0);
case TRI_JSON_NUMBER:
return json->_value._number;
case TRI_JSON_STRING:
case TRI_JSON_STRING_REFERENCE:
try {
// try converting string to number
double v = std::stod(json->_value._string.data);
return v;
}
catch (...) {
if (strlen(json->_value._string.data) == 0) {
return 0.0;
}
// conversion failed
}
break;
case TRI_JSON_ARRAY: {
size_t const n = TRI_LengthArrayJson(json);
if (n == 0) {
return 0.0;
}
else if (n == 1) {
return TRI_ToDoubleJson(TRI_LookupArrayJson(json, 0), failed);
}
break;
}
case TRI_JSON_OBJECT:
break;
}
failed = true;
// TODO: must convert to null here
return 0.0;
}
int64_t TRI_ToInt64Json (TRI_json_t const* json) {
TRI_ASSERT(json != nullptr);
switch (json->_type) {
case TRI_JSON_UNUSED:
case TRI_JSON_NULL:
return 0;
case TRI_JSON_BOOLEAN:
return (json->_value._boolean ? 1 : 0);
case TRI_JSON_NUMBER:
return static_cast<int64_t>(json->_value._number);
case TRI_JSON_STRING:
case TRI_JSON_STRING_REFERENCE:
try {
// try converting string to number
double v = std::stod(json->_value._string.data);
return static_cast<int64_t>(v);
}
catch (...) {
// conversion failed
}
break;
case TRI_JSON_ARRAY: {
size_t const n = TRI_LengthArrayJson(json);
if (n == 0) {
return 0;
}
else if (n == 1) {
return TRI_ToInt64Json(TRI_LookupArrayJson(json, 0));
}
break;
}
case TRI_JSON_OBJECT:
break;
}
// TODO: must convert to null here
return 0;
}
DocumentAccessor& DocumentAccessor::at (int64_t index) {
if (isArray()) {
size_t length = TRI_LengthArrayJson(_current);
if (index < 0) {
// a negative position is allowed
index = static_cast<int64_t>(length) + index;
}
if (index >= 0 && index < static_cast<int64_t>(length)) {
// only look up the value if it is within array bounds
TRI_json_t const* found = TRI_LookupArrayJson(_current, static_cast<size_t>(index));
if (found != nullptr) {
_current = found;
return *this;
}
}
// fall-through intentional
}
setToNull();
return *this;
}
