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/*
Copyright (C) 2014 Waves Audio Ltd.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __WCFourCC_h__
#define __WCFourCC_h__
/* Copy to include
#include "BasicTypes/WCFourCC.h"
*/
//#include "BasicTypes/WTByteOrder.h"
#include "WCFixedString.h"
// These are preprocessor macros rather than inline functions because most compilers can't
// resolve functions at compile-time.
#if _BYTEORDER_BIG_ENDIAN==1
#define FOURCC_BIG(a, b, c, d) ((uint32_t(a)<<24)|(uint32_t(b)<<16)|(uint32_t(c)<< 8)|(uint32_t(d)<< 0))
#define FOURCC_LITTLE(a, b, c, d) ((uint32_t(a)<< 0)|(uint32_t(b)<< 8)|(uint32_t(c)<<16)|(uint32_t(d)<<24))
#define FOURCC_COMPILER(a, b, c, d) FOURCC_BIG(a,b,c,d)
#elif _BYTEORDER_BIG_ENDIAN==0
#define FOURCC_BIG(a, b, c, d) ((uint32_t(a)<< 0)|(uint32_t(b)<< 8)|(uint32_t(c)<<16)|(uint32_t(d)<<24))
#define FOURCC_LITTLE(a, b, c, d) ((uint32_t(a)<<24)|(uint32_t(b)<<16)|(uint32_t(c)<< 8)|(uint32_t(d)<< 0))
#define FOURCC_COMPILER(a, b, c, d) FOURCC_LITTLE(a,b,c,d)
#else
#error _BYTEORDER_BIG_ENDIAN not defined proparly
#endif // _BYTEORDER_HPP_BIG_ENDIAN
typedef uint32_t WTFourCharCode;
#ifndef kEnableWCFourCCDebug
#define kEnableWCFourCCDebug 0 // set to 1 to enable debug members
#endif
class WCFourCC
{
private:
template<class _iter>
static WTFourCharCode stored_from_iter(_iter& i)
{
return s_stored_byte_order==wvNS::wvBO::byte_order_big_endian ? FOURCC_BIG(i[0], i[1], i[2], i[3]) : FOURCC_LITTLE(i[0], i[1], i[2], i[3]);
}
public:
// static const WCFourCC kDefaultFourCC_prv;
static WCFourCC kDefaultFourCC_prv() { return WCFourCC(); }
// change this line will change the byte order in which WCFourCC keeps the four char code
static const wvNS::wvBO::byte_order_type s_stored_byte_order = wvNS::wvBO::compiler_byte_order;
WCFourCC(const char a, const char b, const char c, const char d) :
m_stored_value(s_stored_byte_order==wvNS::wvBO::compiler_byte_order ? FOURCC_BIG(a,b,c,d) : FOURCC_LITTLE(a,b,c,d))
{
#if kEnableWCFourCCDebug == 1
m_c_str_stored_value[sizeof(WTFourCharCode)] = '\0';
#endif
}
WCFourCC() :
m_stored_value(FOURCC_BIG('?','?','?','?')) // since the four chars are the same, there is no need to choose between big & little
{
#if kEnableWCFourCCDebug == 1
m_c_str_stored_value[sizeof(WTFourCharCode)] = '\0';
#endif
}
WCFourCC(const WTFourCharCode in_fourCharCode, const wvNS::wvBO::byte_order_type in_byteOrder = wvNS::wvBO::compiler_byte_order) :
m_stored_value(in_byteOrder==s_stored_byte_order ? in_fourCharCode : wvNS::wvBO::swap32(in_fourCharCode))
{
#if kEnableWCFourCCDebug == 1
m_c_str_stored_value[sizeof(WTFourCharCode)] = '\0';
#endif
}
explicit WCFourCC(const char* in_source_string) :
m_stored_value(stored_from_iter(in_source_string))
{
#if kEnableWCFourCCDebug == 1
m_c_str_stored_value[sizeof(WTFourCharCode)] = '\0';
#endif
}
explicit WCFourCC(const WCFixedStringBase& in_source_string) :
m_stored_value(stored_from_iter(in_source_string))
{
#if kEnableWCFourCCDebug == 1
m_c_str_stored_value[sizeof(WTFourCharCode)] = '\0';
#endif
}
WTFourCharCode GetAsSomeEndian(const wvNS::wvBO::byte_order_type in_byteOrder) const
{
return s_stored_byte_order==in_byteOrder ? m_stored_value : wvNS::wvBO::swap32(m_stored_value);
}
WTFourCharCode GetAsBigEndian() const
{
return s_stored_byte_order==wvNS::wvBO::byte_order_big_endian ? m_stored_value : wvNS::wvBO::swap32(m_stored_value);
}
WTFourCharCode GetAsLittleEndian() const
{
return s_stored_byte_order==wvNS::wvBO::byte_order_little_endian ? m_stored_value : wvNS::wvBO::swap32(m_stored_value);
}
WTFourCharCode GetAsCompilerEndian() const
{
return s_stored_byte_order==wvNS::wvBO::compiler_byte_order ? m_stored_value : wvNS::wvBO::swap32(m_stored_value);
}
WTFourCharCode GetAsStored() const
{
return m_stored_value;
}
char operator[](const unsigned int in_character_index) const
{
return char(m_stored_value >> (8 * (s_stored_byte_order==wvNS::wvBO::compiler_byte_order ? 3-in_character_index : in_character_index)));
}
char& operator[](const unsigned int in_character_index)
{
return reinterpret_cast<char*>(&m_stored_value)[s_stored_byte_order==wvNS::wvBO::byte_order_little_endian ? 3-in_character_index : in_character_index];
}
static size_t size()
{
return sizeof(WTFourCharCode);
}
static size_t max_size()
{
return size();
}
static size_t capacity()
{
return size();
}
WCFixedString4 GetString() const
{
WCFixedString4 retVal;
retVal << operator[](0) << operator[](1) << operator[](2) << operator[](3);
return retVal;
}
#if kEnableWCFourCCDebug == 1
const char* c_str() const
{
return m_c_str_stored_value;
}
#endif
protected:
private:
#if kEnableWCFourCCDebug == 1
union
{
#endif
WTFourCharCode m_stored_value;
#if kEnableWCFourCCDebug == 1
char m_c_str_stored_value[sizeof(WTFourCharCode)+1];
};
#endif
WCFourCC& operator=(const WTFourCharCode); // we want initialization from literal to be dome through the constructor
};
inline bool operator<(const WCFourCC in_left, const WCFourCC in_right)
{
return in_left.GetAsSomeEndian(WCFourCC::s_stored_byte_order) < in_right.GetAsSomeEndian(WCFourCC::s_stored_byte_order);
}
inline bool operator==(const WCFourCC in_left, const WCFourCC in_right)
{
return in_left.GetAsSomeEndian(WCFourCC::s_stored_byte_order) == in_right.GetAsSomeEndian(WCFourCC::s_stored_byte_order);
}
inline bool operator!=(const WCFourCC in_left, const WCFourCC in_right)
{
return ! operator==(in_left, in_right);
}
#define kDefaultFourCC WCFourCC::kDefaultFourCC_prv()
static const WCFourCC kZeroFourCC(0, wvNS::wvBO::compiler_byte_order);
#endif //#if !defined(__WCFourCC_h__)
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