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/*
Copyright 2020, Dirk Krause. All rights reserved.
SPDX-License-Identifier:	BSD-3-Clause
*/

/**	@file	dk4types.h	Data types for DK libraries.

The dkChar data type is mapped to char on all non-Windows platforms,
wchar_t on Windows.
The dk4_c16_t and dk4_c32_t types are for 16 and 32 bit characters.

The dk4_im_t and dk4_um_t are signed and unsigned integer types
of largest size available on the system. All integer values can
be cast to these types without loss.
Functionality is the same as intmax_t/uintmax_t, the definition is
for systems with older compilers not supporting intmax_t/uintmax_t.

*/
#ifndef	DK4TYPES_H_INCLUDED
/**	Protection against multiple inclusion.
*/
#define	DK4TYPES_H_INCLUDED	1

#ifndef DK4CONF_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4conf.h"
#else
#include <dktools-4/dk4conf.h>
#endif
#endif


#ifndef STDIO_H_INCLUDED
#include <stdio.h>
#define STDIO_H_INCLUDED 1
#endif

#ifndef STDLIB_H_INCLUDED
#include <stdlib.h>
#define STDLIB_H_INCLUDED 1
#endif

#if DK4_HAVE_SYS_TYPES_H
#ifndef SYS_TYPES_H_INCLUDED
#include <sys/types.h>
#define SYS_TYPES_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_STDINT_H
#ifndef STDINT_H_INCLUDED
#if defined(__cplusplus) && (!defined(__STDC_LIMIT_MACROS))
/**	Allow use of limit macros from stdint.h file.
*/
#define __STDC_LIMIT_MACROS 1
#endif
#if defined(__cplusplus) && (!defined(__STDC_CONSTANT_MACROS))
/**	Allow use of constant macros from stdint.h file.
*/
#define __STDC_CONSTANT_MACROS 1
#endif
#include <stdint.h>
#define STDINT_H_INCLUDED 1
#endif
#endif
#if DK4_HAVE_INTTYPES_H
#ifndef INTTYPES_H_INCLUDED
#include <inttypes.h>
#define INTTYPES_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_SIGNAL_H
#ifndef SIGNAL_H_INCLUDED
#include <signal.h>
#define SIGNAL_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_WCHAR_H
#ifndef WCHAR_H_INCLUDED
#include <wchar.h>
#define WCHAR_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_FLOAT_H
#ifndef FLOAT_H_INCLUDED
#include <float.h>
#define	FLOAT_H_INCLUDED 1
#endif
#endif

#if _WIN32

/**	16 bit character.
	The dkChar type is mapped to wchar_t on Windows, char on all
	other systems.
*/
typedef	wchar_t	dkChar;

/**	Size of a dkChar.
*/
#define	DK4_CHAR_SIZE	2

/**	Generate dkChar literals.
*/
#define	dkT(x)	L ## x

#else
/* if _WIN32 */

/**	Simple 8 bit character.
	The dkChar type is mapped to wchar_t on Windows, char on all
	other systems.
*/
typedef	char	dkChar;

/**	Size of a dkChar.
*/
#define	DK4_CHAR_SIZE	1

/**	Generate dkChar literals.
*/
#define	dkT(x)	x

#endif
/* if _WIN32 */



#if DK4_SIZEOF_SHORT >= 2
/**	16 bit character, UTF-16 encoded.
*/
typedef	unsigned short	dk4_c16_t;

/**	Notation for 16 bit values.
*/
#define	dkC16(x) ((dk4_c16_t)(x ## U))
#else
#if DK4_SIZEOF_INT >= 2
/**	16 bit character, UTF-16 encoded.
*/
typedef unsigned int	dk4_c16_t;

/**	Notation for 16 bit values.
*/
#define dkC16(x) ((dk4_c16_t)(x ## U))
#else
#if DK4_SIZEOF_LONG >= 2
/**	16 bit character, UTF-16 encoded.
*/
typedef unsigned long	dk4_c16_t;

/**	Notation for 16 bit values.
*/
#define	dkC16(x) ((dk4_c16_t)(x ## UL))
#else
#error "No integer type long enough for 16 bits!"
#endif
#endif
#endif



#if DK4_SIZEOF_SHORT >= 4
/**	32 bit Unicode character.
*/
typedef	unsigned short	dk4_c32_t;

/**	4 bytes type (double word).
*/
typedef	unsigned short	dk4_dword_t;

/**	Notation for 32 bit values.
*/
#define	dkC32(x)	((dk4_c32_t)(x ## U))
#else
#if DK4_SIZEOF_INT >= 4
/**	32 bit Unicode character.
*/
typedef unsigned int	dk4_c32_t;

/**	4 bytes type (double word).
*/
typedef	unsigned int	dk4_dword_t;

/**	Notation for 32 bit values.
*/
#define	dkC32(x)	((dk4_c32_t)(x ## U))
#else
#if DK4_SIZEOF_LONG >= 4
/**	32 bit Unicode character.
*/
typedef unsigned long	dk4_c32_t;

/**	4 bytes type (double word).
*/
typedef	unsigned long	dk4_dword_t;

/**	Notation for 32 bit values.
*/
#define	dkC32(x)	((dk4_c32_t)(x ## UL))
#else
#error "No integer type long enough for 32 bits!"
#endif
#endif
#endif


#if DK4_HAVE_INTMAX_T
/**	Maximum unsigned integer type.
*/
typedef	uintmax_t		dk4_um_t;
/**	Maximum signed integer type.
*/
typedef	intmax_t		dk4_im_t;
#else
#if DK4_HAVE_LONG_LONG
/**	Maximum unsigned integer type.
*/
typedef	unsigned long long	dk4_um_t;
/**	Maximum signed integer type.
*/
typedef	long long		dk4_im_t;
#else
/**	Maximum unsigned integer type.
*/
typedef	unsigned long		dk4_um_t;
/**	Maximum signed integer type.
*/
typedef	long			dk4_im_t;
#endif
#endif


#if DK4_HAVE_SIG_ATOMIC_T
/**	Atomic integer type.
*/
typedef	sig_atomic_t	dk4_sig_atomic_t;
#else
/**	Atomic integer type.
*/
typedef char		dk4_sig_atomic_t;
#endif

/**	Prototype for signal handlers.
*/
typedef	void dk4_sig_handler_t(int);

#if DK4_HAVE_VOLATILE
/**	Use volatile keyword.
*/
#define	DK4_VOLATILE	volatile
#else
/**	Volatile keyword not defined.
*/
#define	DK4_VOLATILE	/* not defined */
#endif

#if !DK4_HAVE_UINT8_T
/**	8 bit data type.
*/
typedef	unsigned char	uint8_t;
#endif

#ifndef	DK4_UINT8_0
/**	0 (8 bits unsigned).
*/
#define	DK4_UINT8_0	((uint8_t)0U)
#endif


#if !DK4_HAVE_UINT16_T
#if DK4_SIZEOF_SHORT >= 2
/**	16 bit data type.
*/
typedef	unsigned short	uint16_t;
#else
#if DK4_SIZEOF_INT >= 2
/**	16 bit data type.
*/
typedef unsigned int	uint16_t;
#else
#if DK4_SIZEOF_LONG >= 2
/**	16 bit data type.
*/
typedef	unsigned long	uint16_t;
#else
#error "No data type found for uint16_t!"
#endif
#endif
#endif
#endif

#ifndef	DK4_UINT16_0
/**	0 (16 bits unsigned).
*/
#define	DK4_UINT16_0 ((uint16_t)0U)
#endif

#if !DK4_HAVE_INT8_T
/**	8 bit signed data type.
*/
typedef	signed char	int8_t;
#endif

#ifndef	DK4_INT8_0
/**	0 (8 bits signed).
*/
#define	DK4_INT8_0	((int8_t)0)
#endif

#if !DK4_HAVE_INT16_T
#if DK4_SIZEOF_SHORT >= 2
/**	16 bit signed data type.
*/
typedef	short	int16_t;
#else
#if DK4_SIZEOF_INT >= 2
/**	16 bit signed data type.
*/
typedef	int	int16_t;
#else
#if DK4_SIZEOF_LONG >= 2
/**	16 bit signed data type.
*/
typedef	long	int16_t;
#else
#error "No data type found for int16_t!"
#endif
#endif
#endif
#endif

#ifndef	DK4_INT16_0
/**	0 (16 bits signed).
*/
#define	DK4_INT16_0	((int16_t)0)
#endif

#if !DK4_HAVE_UINT32_T
#if DK4_SIZEOF_SHORT >= 4
/**	32 bit data type.
*/
typedef	unsigned short	uint32_t;
#else
#if DK4_SIZEOF_INT >= 4
/**	32 bit data type.
*/
typedef	unsigned int	uint32_t;
#else
#if DK4_SIZEOF_LONG >= 4
/**	32 bit data type.
*/
typedef	unsigned long	uint32_t;
#else
#error "No data type found for uint32_t!"
#endif
#endif
#endif
#endif

#ifndef	DK4_UINT32_0
#if DK4_SIZEOF_INT >= 4
/**	0 (32 bits unsigned).
*/
#define	DK4_UINT32_0	((uint32_t)0U)
#else
/**	0 (32 bits unsigned).
*/
#define	DK4_UINT32_0	((uint32_t)0UL)
#endif
#endif

#if !DK4_HAVE_INT32_T
#if DK4_SIZEOF_SHORT >= 4
/**	32 bit signed data type.
*/
typedef	short	int32_t;
#else
#if DK4_SIZEOF_INT >= 4
/**	32 bit signed data type.
*/
typedef	int	int32_t;
#else
#if DK4_SIZEOF_LONG >= 4
/**	32 bit signed data type.
*/
#define	long	int32_t;
#else
#error "No data type found for int32_t!"
#endif
#endif
#endif
#endif

#ifndef	DK4_INT32_0
#if DK4_SIZEOF_INT >= 4
/**	0 (32 bits signed).
*/
#define	DK4_INT32_0	((int32_t)0)
#else
/**	0 (32 bits signed).
*/
#define	DK4_INT32_0	((int32_t)0L)
#endif
#endif


#ifndef	DK4_U16_MAX
/**	Maximum value for 16 bit unsigned integer.
*/
#define	DK4_U16_MAX	((uint16_t)(0xFFFFU))
#endif

#ifndef	DK4_I16_MAX
/**	Maximum value for 16 bit signed integer.
*/
#define	DK4_I16_MAX	((int16_t)(0x7FFFU))
#endif

#ifndef	DK4_I16_MIN
/**	Minimum value for 16 bit signed integer.
*/
#define	DK4_I16_MIN	((int16_t)(-0x7FFF - 1))
#endif

#ifndef	DK4_U32_MAX
/**	Maximum value for 32 bit unsigned integer.
*/
#define	DK4_U32_MAX	((uint32_t)(0xFFFFFFFFUL))
#endif

#ifndef	DK4_I32_MAX
/**	Maximum value for 32 bit signed integer.
*/
#define	DK4_I32_MAX	((int32_t)(0x7FFFFFFFL))
#endif

#ifndef	DK4_I32_MIN
/**	Minimum value for 32 bit signed integer.
*/
#define	DK4_I32_MIN	((int32_t)(-0x7FFFFFFFL - 1L))
#endif

#ifndef	DK4_DBL_DIGITS
#ifdef	DBL_DECIMAL_DIG
/**	Number of digits to printf or scanf a double without precision loss.
	DBL_DECIMAL_DIG specifies the number of decimal digits that can be
	rounded to a floating-point number without change to the value.
	Available in C11.
*/
#define	DK4_DBL_DIGITS (DBL_DECIMAL_DIG)
#else
#ifdef	DECIMAL_DIG
/**	Number of digits to printf or scanf a double without precision loss.
	DECIMAL_DIG specifies the number of decimal digits that can be
	rounded to a floating-point number without change to the value.
	Available in C99.
*/
#define	DK4_DBL_DIGITS (DECIMAL_DIG)
#else
#ifdef	DBL_DIG
/**	Number of digits to printf or scanf a double without precision loss.
	DBL_DIG is the number of significant digits in a floating point number.
*/
#define	DK4_DBL_DIGITS ((DBL_DIG) + 3)
#else
/**	Number of digits to printf or scanf a double without precision loss.
	As neither DBL_DECIMAL_DIG, DECIMAL_DIG nor DBL_DIG is defined we
	use a fallback value 17 here.
*/
#define	DK4_DBL_DIGITS 17
#endif
#endif
#endif
#endif

/**	Pointer to const dkChar.
*/
typedef	const dkChar		*DK4_PCDKCHAR;

/**	Pointer to dkChar.
*/
typedef	dkChar			*DK4_PDKCHAR;

/**	Pointer to const character.
*/
typedef const char		*DK4_PCCHAR;

/**	Pointer to character.
*/
typedef	char			*DK4_PCHAR;

#endif
/* ifndef DK4TYPES_H_INCLUDED */