#include <Core/Core.h>

using namespace Upp;

inline String PrintUsage() {
	StringBuffer sb;
	sb << "Prints hex view of selected file\n\n\
Syntax:\n"
<< GetExeTitle() << " [file]\n\n\
Options:\n\
file\t\t Path to selected file\n";
	return sb;
}

CONSOLE_APP_MAIN
{
	const Vector<String>& cl = CommandLine();

	if (cl.GetCount() == 0)
	{
		SetExitCode(0);
		Cout() << PrintUsage();
		return;
	}

	String filePath(NormalizePath(cl[0]));

	if (!FileExists(filePath))
	{
		SetExitCode(1);
		Cerr() << Format("File \"%s\" doesn't exists\n", filePath);
		return;
	}

	FileIn fs;

	if (!fs.Open(filePath))
	{
		SetExitCode(1);
		Cerr() << Format("Can't read \"%s\" file\n", filePath);
		return;
	}

	const int wrapCount = 16;
	int lineCount = 0,
		columnCount = 0;

	StringBuffer text;

	while (!fs.IsEof())
	{
		if (columnCount == 0)
			Cout() << Format("%7s:", Format64Hex(lineCount++ * wrapCount));

		const int data = fs.Get();
		text.Cat(!iscntrl(data) ? char(data) : '.');
		const String hex = Format64Hex(data);
		Cout() << Format(" %2s", hex);

		if (++columnCount == wrapCount)
		{
			columnCount = 0;
			Cout() << " | " << ~text << '\n';
			text.Clear();
		}
	}

	if (text.GetCount() > 0)
	{
		const String fmt = String().Cat() << '%' << 3 * (wrapCount - columnCount + 1) << 's';
		Cout() << Format(fmt, " | ") << ~text << '\n';
	}
}

#include <Core/Core.h>

using namespace Upp;

inline String PrintUsage() {
	StringBuffer sb;
	sb << "Prints hex view of selected file\n\n\
Syntax:\n"
<< GetExeTitle() << " [file]\n\n\
Options:\n\
file\t\t Path to selected file\n";
	return sb;
}

class HexStream : public OutStream {
private:
	const int wrapCount;
	int columnCount,
		lineCount;
	Stream *stream;
public:
	HexStream(Stream *toStream) : stream(toStream), wrapCount(16), columnCount(0), lineCount(0) { }

	virtual void Out(const void *data, dword size)
	{
		StringBuffer text;

		const byte *s = (const byte *)data;

		for (dword i = 0; i < size; ++i)
		{
			if (columnCount == 0)
				*stream << Format("%7s:", Format64Hex(lineCount++ * wrapCount));

			const byte& value = s[i];
			text.Cat(!iscntrl(value) ? char(value) : '.');
			const String hex = Format64Hex(value);
			*stream << Format(" %2s", hex);

			if (++columnCount == wrapCount)
			{
				columnCount = 0;
				*stream << " | " << ~text << '\n';
				text.Clear();
			}
		}

		if (text.GetCount() > 0)
		{
			const String fmt = String().Cat() << '%' << 3 * (wrapCount - columnCount + 1) << 's';
			*stream << Format(fmt, " | ") << ~text << '\n';
		}
	}
};

CONSOLE_APP_MAIN
{
	const Vector<String>& cl = CommandLine();

	if (cl.GetCount() == 0)
	{
		SetExitCode(0);
		Cout() << PrintUsage();
		return;
	}

	String filePath(NormalizePath(cl[0]));

	if (!FileExists(filePath))
	{
		SetExitCode(1);
		Cerr() << Format("File \"%s\" doesn't exists\n", filePath);
		return;
	}

	FileIn fs;

	if (!fs.Open(filePath))
	{
		SetExitCode(1);
		Cerr() << Format("Can't read \"%s\" file\n", filePath);
		return;
	}

	HexStream stream(&Cout());
	/*const int64 count =*/
	CopyStream(stream, fs);
}