bool
Reader::readValue()
{
Token token;
skipCommentTokens( token );
bool successful = true;
if ( collectComments_ && !commentsBefore_.empty() )
{
currentValue().setComment( commentsBefore_, commentBefore );
commentsBefore_ = "";
}
switch ( token.type_ )
{
case tokenObjectBegin:
successful = readObject( token );
break;
case tokenArrayBegin:
successful = readArray( token );
break;
case tokenNumber:
successful = decodeNumber( token );
break;
case tokenString:
successful = decodeString( token );
break;
case tokenTrue:
currentValue() = true;
break;
case tokenFalse:
currentValue() = false;
break;
case tokenNull:
currentValue() = Value();
break;
default:
return addError( "Syntax error: value, object or array expected.", token );
}
if ( collectComments_ )
{
lastValueEnd_ = current_;
lastValue_ = ¤tValue();
}
return successful;
}
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_ = "";
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::parse( const char *beginDoc, const char *endDoc,
Value &root,
bool collectComments )
{
begin_ = beginDoc;
end_ = endDoc;
collectComments_ = collectComments;
current_ = begin_;
lastValueEnd_ = 0;
lastValue_ = 0;
commentsBefore_ = "";
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 );
return successful;
}
bool Reader::readValue() {
Token token;
skipCommentTokens(token);
bool successful = true;
if (collectComments_ && !commentsBefore_.empty()) {
currentValue().setComment(commentsBefore_, commentBefore);
commentsBefore_ = "";
}
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:
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_ = ¤tValue();
}
return successful;
}
bool Reader::readValue() {
Token token;
skipCommentTokens(token);
bool successful = true;
if (collectComments_ && !commentsBefore_.empty()) {
// Remove newline characters at the end of the comments
size_t lastNonNewline = commentsBefore_.find_last_not_of("\r\n");
if (lastNonNewline != std::string::npos) {
commentsBefore_.erase(lastNonNewline + 1);
} else {
commentsBefore_.clear();
}
currentValue().setComment(commentsBefore_, commentBefore);
commentsBefore_ = "";
}
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:
currentValue() = true;
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
break;
case tokenFalse:
currentValue() = false;
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
break;
case tokenNull:
currentValue() = Value();
currentValue().setOffsetStart(token.start_ - begin_);
currentValue().setOffsetLimit(token.end_ - begin_);
break;
case tokenArraySeparator:
if (features_.allowDroppedNullPlaceholders_) {
// "Un-read" the current token and mark the current value as a null
// token.
current_--;
currentValue() = Value();
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_ = ¤tValue();
}
return successful;
}
