winamp/Src/nde/win/ColumnField.cpp

/* ---------------------------------------------------------------------------
Nullsoft Database Engine
--------------------
codename: Near Death Experience
--------------------------------------------------------------------------- */

/* ---------------------------------------------------------------------------

ColumnField Class
Windows implementation

Field data layout:
[1 byte] Field Type
[1 byte] Unused (maybe convert to 'searchable')
[1 byte] Name Length
[Name Length bytes] Name (UTF-8)
--------------------------------------------------------------------------- */

#include "../nde.h"

//---------------------------------------------------------------------------
ColumnField::ColumnField(unsigned char FieldID, const wchar_t *FieldName, unsigned char FieldType, Table *parentTable)
{
	InitField();
	Type = FIELD_COLUMN;
	MyType = FieldType;
	Name = ndestring_wcsdup(FieldName);
	ID = FieldID;
}

//---------------------------------------------------------------------------
void ColumnField::InitField(void)
{
	searchable = false;
	MyType = FIELD_UNKNOWN;
	Type = FIELD_COLUMN;
	Name = NULL;
	ID = 0;
}

//---------------------------------------------------------------------------
ColumnField::ColumnField()
{
	InitField();
}

//---------------------------------------------------------------------------
ColumnField::~ColumnField()
{
	ndestring_release(Name);
}

void ColumnField::SetSearchable(bool val)
{
	searchable=val;
}

bool ColumnField::IsSearchableField() const
{
	return searchable;
}

//---------------------------------------------------------------------------
void ColumnField::ReadTypedData(const uint8_t *data, size_t len)
{
	unsigned char c;
	int pos=0;

	// [1 byte] Field Type
	CHECK_CHAR(len);
	MyType = GET_CHAR(); 
	pos++;

	// [1 byte] unused 
	CHECK_CHAR(len);
//cut:	indexUnique = (BOOL)GET_CHAR();
	pos++;

	// [1 byte] string length
	CHECK_CHAR(len);
	c = GET_CHAR(); 
	pos++;

	if (c)
	{
		CHECK_BIN(len, c);

		int string_length = MultiByteToWideChar(CP_UTF8, 0, (LPCSTR)(data+pos), c, 0, 0);
		Name = ndestring_malloc((string_length+1)*sizeof(wchar_t));
		MultiByteToWideChar(CP_UTF8, 0, (LPCSTR)(data+pos), c, Name, string_length);
		Name[string_length]=0;
	}
}

//---------------------------------------------------------------------------
void ColumnField::WriteTypedData(uint8_t *data, size_t len)
{
	int pos = 0;

	// [1 byte] Field Type
	CHECK_CHAR(len);
	PUT_CHAR(MyType); 
	pos++;

	// [1 byte] unused 
	CHECK_CHAR(len);
	PUT_CHAR(0/*(char)indexUnique*/); 
	pos++;

	CHECK_CHAR(len);
	if (Name) 
	{
		size_t string_length = WideCharToMultiByte(CP_UTF8, 0, Name, -1, 0, 0, 0, 0);
		if (string_length)
		{
			PUT_CHAR((uint8_t)string_length-1);
			pos++;

			CHECK_BIN(len, string_length-1);		
			WideCharToMultiByte(CP_UTF8, 0, Name, -1, (LPSTR)(data+pos), (int)string_length-1, 0, 0);
		}
		else
		{
			PUT_CHAR(0);
		}
	}
	else
	{
		PUT_CHAR(0);
	}
}

//---------------------------------------------------------------------------
unsigned char ColumnField::GetDataType(void)
{
	return MyType;
}

//---------------------------------------------------------------------------
void ColumnField::SetDataType(unsigned char type)
{
	if ((MyType == FIELD_INTEGER || MyType == FIELD_BOOLEAN || MyType == FIELD_DATETIME || MyType == FIELD_LENGTH || MyType == FIELD_INT64) && 
		(type == FIELD_INTEGER || type == FIELD_BOOLEAN || type == FIELD_DATETIME || type == FIELD_LENGTH || type == FIELD_INT64)) {
			MyType = type;
	}
	// going from string to filename or filename to string is OK
	if ((MyType == FIELD_FILENAME && type == FIELD_STRING)
		|| (MyType == FIELD_STRING && type == FIELD_FILENAME))
	{
		MyType = type;
	}
}

//---------------------------------------------------------------------------
wchar_t *ColumnField::GetFieldName(void)
{
	return Name;
}

//---------------------------------------------------------------------------
void ColumnField::SetFieldName(wchar_t *name)
{
	if (Name) ndestring_release(Name);
	Name = ndestring_wcsdup(name);
}

//---------------------------------------------------------------------------
size_t ColumnField::GetDataSize(void)
{
	size_t s=3;
	if (Name)
	{
		int string_length=WideCharToMultiByte(CP_UTF8, 0, Name, -1, 0, 0, 0, 0);
		if (string_length)
			s+=string_length-1;
	}
	return s;
}

//---------------------------------------------------------------------------
int ColumnField::Compare(Field * /*Entry*/)
{
	return 0;
}