/**
* Parses a string and extract VT100 control sequence information.
* @param seq The string to parse.
* @param values A pointer to an array that will hold the resultant values. The memory must already be allocated.
* @param numValues A pointer to an integer that will hold the number of resultant values.
* @param seqLength A pointer to an integer that will hold the length of the control sequence.
* @return The token number that identifies the type of the control sequence.
*/
int ControlSeqParser::parse(const char *seq, int *values, int *numValues, int *seqLength)
{
int result = CS_UNKNOWN;
if (seq != NULL)
{
m_seq = seq;
result = parseSeq();
}
if (seqLength != NULL)
{
*seqLength = 0;
}
if (result != CS_UNKNOWN)
{
if (seqLength != NULL)
{
*seqLength = m_currentPos;
}
if (numValues != NULL)
{
*numValues = m_numValues;
}
if (values != NULL)
{
for (int i=0; i < MAX_NUM_VALUES && i < m_numValues; i++)
{
values[i] = m_values[i];
}
}
}
return result;
}
static Node* parseUnion(const char*& nextChar,Uptr groupDepth)
{
Node* result = nullptr;
while(true)
{
Node* newNode = parseSeq(nextChar,groupDepth);
result = result ? new Alt(result,newNode) : newNode;
switch(*nextChar)
{
case ')':
if(groupDepth == 0) { Errors::fatalf("unexpected ')'"); }
return result;
case 0:
if(groupDepth != 0) { Errors::fatalf("unexpected end of string"); }
return result;
case '|':
++nextChar;
break;
default:
Errors::fatalf("unrecognized input");
};
};
}
