//parseSet.c
//John T. Rine
//October 15, 2011

#include "set.h"
#include<stdlib.h>

set parseSet(char *setInput)
{
	int i, count = 0;
	char **rowPtr = NULL;
	int stringCharacterPosition = 0;
	int elementNumber = 0;
	int elementCount = 0;
	int elementCharacterCount = 0;
	int oldElementCharacterCount = 0;
	int oldStringCharacterPosition = 0;

	set returnSet;

	if(checkSetNotation(setInput) == 0) exit(1);

	elementCount = occurrences(setInput, ',') + 1;
	rowPtr = malloc(sizeof(char *) * elementCount);

	while(*(setInput + stringCharacterPosition) != '\0')
	{
		if(*(setInput + stringCharacterPosition) == '{') stringCharacterPosition++;
		oldElementCharacterCount = elementCharacterCount;
		oldStringCharacterPosition = stringCharacterPosition;
		while(*(setInput + stringCharacterPosition) != ',' && *(setInput + stringCharacterPosition) != '}')
		{
			elementCharacterCount++;
			stringCharacterPosition++;
		}
		*(rowPtr + elementNumber) = malloc(sizeof(char) * (elementCharacterCount + 1));
		count = 0;
		while(*(setInput + oldStringCharacterPosition) != ',' && *(setInput + oldStringCharacterPosition) != '}')
		{
			*(*(rowPtr + elementNumber) + count) = *(setInput + oldStringCharacterPosition);
			oldStringCharacterPosition++;
			count++;
		}
		*(*(rowPtr + elementNumber) + count) = '\0';
		elementCharacterCount = 0;
		elementNumber++;
		stringCharacterPosition++;
	}
	returnSet.setPtr = rowPtr;
	returnSet.numberOfElements = elementNumber;

	return returnSet;
}