Centaur | Reader

Reader (night2.cpp) https://www.centaur.pw/software/night/night2.cpp [Direct Link]
/* Night (night2)
 * 1/30/2026
 * Version 2.3
 * Jon Siragusa <jon@centaur.pw>
 * https://www.centaur.pw/
 *
 * Copyright (C) Centaur, 2026. All Rights Reserved.
 *
 * night2.cpp
 */

#include "night2.h"

/* Function definitions */

int lines(string str)
{
	int o = 1;
	for (unsigned int i = 0 ; i < str.length(); i++) { if (str[i] == 10) o++; }
	return o;
}

string* str2array(string str)
{
	static string arraystr[MAX_LINES];
	stringstream ss(str);
	int i = 0;
	for (string line; getline(ss, line); i++)
	{
		arraystr[i] = line;
	}
	return arraystr;
}

string box(string str)
{
	int c = lines(str);
	if (c > MAX_LINES) return str;
	if (c == 1)
	{
		string r = "";
		r += BOX_TOP_LEFT_CORNER;
		for (unsigned int i = 0; i < strip_night(str).length() + 2; i++) r += BOX_HORIZONTAL_LINE;
		r += BOX_TOP_RIGHT_CORNER;
		r += "\n";
		r += BOX_VERTICAL_LINE;
		r += ' ' + night2(str) + ' ' + BOX_VERTICAL_LINE;
		r += "\n";
		r += BOX_BOTTOM_LEFT_CORNER;
		for (unsigned int i = 0; i < strip_night(str).length() + 2; i++) r += BOX_HORIZONTAL_LINE;
		r += BOX_BOTTOM_RIGHT_CORNER;
		return r;
	}
	else
	{
		string* x;
		x = str2array(str);
		int numlines = lines(str);
		unsigned int longest = 0;
		for (int i = 0; i < numlines; i++)
		{
			if (strlen(strip_night(x[i]).c_str()) > longest) longest = strlen(strip_night(x[i]).c_str());
		}
		string r = "";
		r += BOX_TOP_LEFT_CORNER;
		for (unsigned int i = 0; i < longest + 2; i++) r += BOX_HORIZONTAL_LINE;
		r += BOX_TOP_RIGHT_CORNER;
		r += "\n";
		for (int i = 0; i < numlines; i++)
		{
			string j = "";
			j += BOX_VERTICAL_LINE;
			j += ' ' + night2(x[i]) + (strlen(strip_night(x[i]).c_str()) == longest ? "" : string(longest - strlen(strip_night(x[i]).c_str()), ' ')) + ' ' + BOX_VERTICAL_LINE;
			r += j;
			r += "\n";
		}
		r += BOX_BOTTOM_LEFT_CORNER;
		for (unsigned int i = 0; i < longest + 2; i++) r += BOX_HORIZONTAL_LINE;
		r += BOX_BOTTOM_RIGHT_CORNER;
		r += "\n";
		return r;
	}
}

string readtag(string str, string begin_str, string end_str)
{
	string a = str;
	a = replace(a, begin_str, "");
	a = replace(a, end_str, "");
	return a;
}

string center(string str)
{
	try
	{
		int control_chars = 0;
		for (unsigned int i = 0; i < str.length(); i++) if (str[i] == '\e') control_chars++;
		string output = "";
		int v = console_size.ws_col - str.length();
		output.append(control_chars * 2, ' ');
		output.append(v / 2, ' ');
		output += str;
		return output;
	}
	catch (...)
	{
		return str;
	}
}

string replace(string str, const string f, const string r)
{
	if (f.empty()) return str;
	string a = str;
	size_t b = 0;
	while ((b = a.find(f, b)) != string::npos)
	{
		a.replace(b, f.length(), r);
		b += r.length();
	}
	return a;
}

string strip_ansi(string str)
{
	string b = str;
	for (int i = 0; i < ansi_array_count; i++)
	if (!strcmp(ansi_array[i].c_str(), NEWLINE)) continue; else b = replace(b, ansi_array[i], "");
	return b;
}

string strip_night(string str)
{
	string b = str;
	for (int i = 0; i < night2_array_count; i++)
	b = replace(b, night2_array[i], "");
	b = replace(b, Code_BeginCenter, "");
	b = replace(b, Code_EndCenter, "");
	b = replace(b, Code_BeginBox, "");
	b = replace(b, Code_EndBox, "");
        #if (defined(SUPPORT_OLD_CODES) && SUPPORT_OLD_CODES == 1)
		for (int j = 0; j < night1_array_count; j++)
                b = replace(b, night1_array[j], "");
        #endif /* SUPPORT_OLD_CODES */
	return b;
}

string night2(const string str)
{
	string bc = Code_BeginCenter;
	string ec = Code_EndCenter;
	string bb = Code_BeginBox;
	string eb = Code_EndBox;
	string b = str;
	b = replace(b, Code_None, NONE);
	b = replace(b, Code_NewLine, NEWLINE);
	if (b.length() >= bb.length() && b.find(bb) != string::npos)
	return box(readtag(b, bb, eb));
	for (int i = 0; i < ansi_array_count; i++)
	b = replace(b, night2_array[i], ansi_array[i]);
        #if (defined(SUPPORT_OLD_CODES) && SUPPORT_OLD_CODES == 1)
		for (int j = 0; j < night1_array_count; j++)
		b = replace(b, night1_array[j], old_ansi_array[j]);
	#endif /* SUPPORT_OLD_CODES */
	if (b.length() >= bc.length() && b.find(bc) != string::npos)
	return center(readtag(b, bc, ec));
	else return b;
}

void night2file(char file[])
{
	ifstream ifile(file);
	if (!ifile) { cout << file << ": " << strerror(errno) << endl; return; }
	else
	{
		for (string line; getline(ifile, line);)
		{
			if (line[0] == '#') continue;
			cout << night2(line) << endl;
		}
		ifile.close();
	}
	return;
}

string filecontents(char file[])
{
	string c;
	ifstream ifile(file);
	if (!ifile) { cout << file << ": " << strerror(errno) << endl; return ""; }
	else
	{
		for (string line; getline(ifile, line);)
		{
			c.append(line);
			c.append("\n");
		}
		ifile.close();
	}
	return c;
}

/* Main function */

int main(int argc, char **argv)
{
	if (argc < 2)
	{
		for (string line; getline(cin, line);)
		{
			cout << night2(line) << endl;
		}
		return 0;
	}
	else if (argc > 1 && (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-h") == 0))
	{
		cout << "Centaur Night version " << NIGHT_VERSION << endl << endl;
		cout << "Usage: " << argv[0] << " <file> ..." << endl;
                cout << "       " << argv[0] << " \"`cat file`\" | \"$(cat file)\"" << endl;
                cout << "       " << "cat file | " << argv[0] << endl;
		cout << "       " << argv[0] << " -s | --string <string> ..." << endl;
		cout << "       " << argv[0] << " -a | --remove-ansi <file> ..." << endl;
		cout << "       " << argv[0] << " -n | --remove-night <file> ..." << endl;
		cout << "       " << argv[0] << " -t | --test" << endl;
		cout << "       " << argv[0] << " -h | --help" << endl << endl;
		cout << PROGRAM_HELP << endl;
		return 0;
	}
	else if (argc > 1 && (!strcmp(argv[1], "--test") || !strcmp(argv[1], "-t")))
	{
		cout << night2(TEST_PATTERN) << endl;
		cout << night2(":center:Centered Text:.center:") << endl;
		return 0;
	}
	else if (argc >= 2 && (strcmp(argv[1], "--string") == 0 || strcmp(argv[1], "-s") == 0))
	{
		string input = "";
		for (int i = 2; i < argc; i++)
		{
			input = input + argv[i];
			if (i + 1 != argc) input = input + " ";
		}
		cout << night2(input) << endl;
		return 0;
	}
	else if (argc > 1)
	{
		bool RemoveANSI = false;
		bool RemoveNight = false;
		if (!strcmp(argv[1], "--remove-ansi") || !strcmp(argv[1], "-a")) RemoveANSI = true;
		if (!strcmp(argv[1], "--remove-night") || !strcmp(argv[1], "-n")) RemoveNight = true;
		int shift = (RemoveANSI || RemoveNight) ? 1 : 0;
		for (int i = 1 + shift; i < argc; i++)
		{
			if (!strcmp(argv[i], "-a") || !strcmp(argv[i], "-n") || !strcmp(argv[i], "--remove-ansi") || !strcmp(argv[i], "--remove-night")) continue;
			if (!RemoveANSI && !RemoveNight) night2file(argv[i]);
			else if (RemoveANSI) cout << strip_ansi(filecontents(argv[i]));
			else if (RemoveNight) cout << strip_night(filecontents(argv[i]));
		}
		return 0;
	}
}