// ***************************************************************************************************************
//  Encapsulation of a simple string
// ***************************************************************************************************************

#include "ezstring.h"

EZString::EZString() : appendBuffer(30)
{
	str=0;
	allocatedMemory=0;
	length=0;
}

EZString::EZString(const char* input) : appendBuffer(30)
{
	if (input)
		length=strlen(input);
	else length=0;

	allocatedMemory=length + 1 + appendBuffer;
	str = new char [allocatedMemory];
	if (input)
		strcpy (str, input);
	str[length]=0;	
}

EZString::EZString(const EZString& input) : appendBuffer(30)
{
	if (input.str)
		length=strlen(input.str);
	else
		length=0;

	allocatedMemory=length + 1 + appendBuffer;
	str = new char [allocatedMemory];
	if (input.str)
		strcpy (str, input.str);
	str[length]=0;
}

EZString::~EZString()
{
	if (str) delete [] str;
	allocatedMemory=0;
	length=0;
}


EZString& EZString::operator = (const EZString& input)
{
	if (&input == this)
		return *this;

	if (input.str)
		length=strlen(input.str);
	else
	{
		length=0;
		if (allocatedMemory)
			str[0]=0;
		else
			str=0;

		return *this;
	}

	if (length >= allocatedMemory)
	{
		if (str) delete [] str;

		allocatedMemory=length + 1 + appendBuffer;
		str = new char [allocatedMemory];
	}
	
	if (input.str)
		strcpy (str, input.str);
	str[length]=0;

	return *this;
}

void EZString::Clear(void)
{
	if (str)
		delete [] str;
	str=0;
	length=0;
}

void EZString::Append(const char c)
{
	if (allocatedMemory==0 || length >= (allocatedMemory-1))
	{
		char* newStr;
		allocatedMemory+=30;
		newStr = new char [allocatedMemory];
		
		if (str)
		{
			strcpy (newStr, str);
			delete [] str;
		}

		str = newStr;
	}
	
	str[length++]=c;
	str[length]=0;
}

void EZString::UnAppend(void)
{
	if ((str==0) || (length==0))
		return;

	str[--length]=0;
}

void EZString::PrefixName(char *name)
{
	int nameLength;

	if (!name)
		return;

	nameLength=strlen(name);

	// Reallocate the string and shift it right
	char* newStr;
	allocatedMemory=length+nameLength + 3;
	newStr = new char [allocatedMemory];

	if (str)
	{
		strcpy (newStr + nameLength + 2, str);
		delete [] str;
		str = newStr;
		
		strcpy(str, name);

		str[nameLength]=':';
		str[nameLength+1]=' ';
	}
	else
	{
		str = newStr;
		
		strcpy(str, name);

		str[nameLength]=':';
		str[nameLength+1]=' ';
		str[nameLength+2]=0;
	}

	length+=nameLength +2;
}

int operator==(const EZString& left, const EZString& right)
{
	if (left.str==0 || right.str==0)
		return 0;

	return (! (strcmp(left.str, right.str)));
}

int operator > (const EZString& left, const EZString& right)
{
	if (left.str==0 || right.str==0)
		return 0;

	return (strcmp(left.str, right.str) > 0);
}

int operator < (const EZString& left, const EZString& right)
{
	if (left.str==0 || right.str==0)
		return 0;

	return (strcmp(left.str, right.str) < 0);
}