#include <cstring>
#include <cctype>
#include <vector>

#include "linebreaker2.h"

using namespace std;

/*
 * Fill the vector with pointers to each word in the string.
 */
void LineBreaker2::fill()
{
	// Find all the words.
	char last = ' ';
	for(char *scan = m_data.get(); *scan; ++scan) {
		// Current character.
		char curr = *scan;

		// If the last was a space and this is not, word start.
		if(isspace(last) && !isspace(curr))
			m_ptrs.push_back(scan);

		// If last was not space, and this is, word end
		else if(!isspace(last) && isspace(curr))
			*scan = '\0';

		// The current is last for the next time 'round.
		last = curr;
	}

	// Add the null.
	m_ptrs.push_back(nullptr);
}

char *LineBreaker2::pop_back() {
	// If it's too small, bail.
	if(size() < 1) return nullptr;

	// Get the last string for later return, then remove the null and the
	// returned item, then put the null back.
	char *ret = back();
	m_ptrs.pop_back();
	m_ptrs.pop_back();
	m_ptrs.push_back(nullptr);

	return ret;
}