The following table shows correspondences between C/C++ and Pascal numerical types.

References are:
- FPC Reference guide (v1.0.8).
- The C Library Reference Guide, by Eric Huss.


C/C++ <-> BeAPI <-> Pascal
==========================
unsigned char	=	unit8		=	Byte;
char			=	int8		=	Shortint;
unsigned int	=	unit16	=	Word;
short int		=	int16		=	Smallint;
int			=			=	We use Integer most times for this, but could be Smallint
unsigned long	=	uint32	=	Longword;
long			=	int32		=	Longint;
float			=			=	Single;
double		=			=	Double;
long double		=			=	Extended;


C/C++ Types
===========
Type			Size		Range
---------------------------------
unsigned char	8 bits		0 to 255
char			8 bits		-128 to 127
unsigned int	16 bits	0 to 65,535
short int		16 bits	-32,768 to 32,767
int			16 bits	-32,768 to 32,767
unsigned long	32 bits	0 to 4,294,967,295
long			32 bits	-2,147,483,648 to 2,147,483,647
float			32 bits	1.17549435 * (10^-38) to 3.40282347 * (10^+38)
double		64 bits	2.2250738585072014 * (10^-308) to 1.7976931348623157 * (10^+308)
long double		80 bits	3.4 * (10^-4932) to 1.1 * (10^4932)

FPC Pascal Types
================
Type		Size		Range
-----------------------------
Byte		8 bits		0..255
ShortInt	8 bits		-128..127
Word		16 bits	0..65535
SmallInt	16 bits	-32768..32767
LongWord	32 bits	0..4294967295
LongInt	32 bits	-2147483648..2147483647

Integer	16/32/64	either smallint, longint or int64		| These two depends on the
Cardinal	16/32/64	either word, longword or qword	| compiler mode and platform.

Real		16/32		(depends on the platform)
Single	32 bits	1.5E-45 .. 3.4E38
Double	64 bits	5.0E-324 .. 1.7E308
Extended	80 bits	1.9E-4951 .. 1.1E4932

Int64		64		-9223372036854775808 .. 9223372036854775807
QWord	64		0 .. 18446744073709551615
Comp		64		-2E64+1 .. 2E63-1