Better Read/Writer vectors of OpenCV Points.

better_parser.cpp

#include <vector>
#include <string>
#include <fstream>
#include <iostream>
#include <climits>
#include <opencv2/opencv.hpp>

#define DELIMITERS " \t,[]{}:\"abcdefghijklmnopqrstuvwz`~!@#$%^&*()_=+\\|;'?/.<>"

using namespace std;
using namespace cv;

char* removeHyphen(char* input) {
	if(input == NULL) return input;
	while(*input == '-' && *(input+1) == '-' && *input)
		input++;
	return input;
}

bool containsNumber(char* inp) {
	while(*inp) {
		cout << "checked" << endl;
		if(*inp=='1' || *inp=='2'|| *inp=='3'|| *inp=='4'|| *inp=='5'|| *inp=='6'|| *inp=='7'|| *inp=='8'|| *inp=='9'|| *inp=='0')
			return true;
		inp++;
	}
	return false;
}

void writePointVector(const vector<Point>& pts, const string& filename)
{
	ofstream fout(filename.c_str());
	if(fout.is_open())
	{
		fout << "[\n";
		for(int i=0; i<pts.size()-1; i++)
			fout << "\t{ \"x\": " << pts[i].x << ", \"y\": " << pts[i].y << " },\n";
		fout << "\t{ \"x\": " << pts[pts.size()-1].x << ", \"y\": " << pts[pts.size()-1].y << " }\n";
		fout << "]\n";
		fout.close();
	}
	else
		cout << "Unable to open " << filename << endl;
}

void readPointVector(const string& filename, vector<Point>& pts)
{
	ifstream fin(filename.c_str());
	string line;
	if(fin.is_open())
	{
		bool x_found=false, y_found=false;
		int x=INT_MIN, y=INT_MIN;
		while(getline(fin, line))
		{
			char* token = strtok((char*)line.c_str(), DELIMITERS);
			while(token != NULL)
			{
		 		if(*token == 'x')
		 			x_found=true;
		 		else if(*token == 'y')
					y_found=true;
				else {
		 			if(x_found && containsNumber(token))
		 			{
						token = removeHyphen(token);
						x = atoi(token);
						x_found=false;
		 			}
		 			else if(y_found && containsNumber(token))
		 			{
						token = removeHyphen(token);
						y = atoi(token);
						y_found=false;
		 			}
		 		
		 			if(x!=INT_MIN && y!=INT_MIN)
		 			{
		 				pts.push_back(Point(x, y));
		 				x=y=INT_MIN;
		 			}
		 		}
		 		token = strtok(NULL, DELIMITERS);
			}
		}
		fin.close();
	}
	else
		cout << "Unable to open " << filename << endl;
}

int main()
{
	vector<Point> pts;
	// pts.push_back(Point(2, 3));
	// pts.push_back(Point(7, 34));
	// pts.push_back(Point(89, 56));
	// pts.push_back(Point(-1, 7));
	// writePointVector(pts, "vector_output.txt");
	readPointVector("vector_input.txt", pts);
	for(int i=0; i<pts.size(); i++)
		cout << "x: " << pts[i].x << ", y: " << pts[i].y << endl;
	return 0;
}

vector_input.txt

[
{ "x":	 #$%2, 
"y": %%%\3 },
{ "y"
:
 7,
 "x"
: 
34 },
{ "x": 89, 
"		y": 56 },
	{ "y":	1, "x": 
9 },
	{ "y": -9, "x": -67 },
	{ "x  ":   -=-=-=-=-59, "y": -------2 },
{
   x
     =
   5,
   y
      = 8},
{
   x=$%5, y=---8
}
	
]