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fixed tabs, added QWord.

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oscarl-2
2003-11-17 21:03:27 +00:00
parent 6a12e04be7
commit b003d3f4e2
1 changed files with 46 additions and 38 deletions
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84
bepascal/docs/NumericalTypes.txt
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@@ -3,56 +3,64 @@ The following table shows correspondences between C/C++ and Pascal numerical typ
References are:
- FPC Reference guide (v1.0.8).
- The C Library Reference Guide, by Eric Huss.
- BeAPI headers.
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;
signed char = int8 = Shortint;
unsigned char = unit8 = Byte;
short int = int16 = Smallint;
unsigned int = unit16 = Word;
int = = We use Integer most times for this, but could be Smallint
long = int32 = Longint;
unsigned long = uint32 = Longword;
long long = int64 = Int64;
unsigned long long = uint64 = QWord;
float = = Single;
double = = Double;
long double = = Extended;
C/C++ Types
===========
Type Size Range
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)
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
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.
//[*]These two depends on the compiler mode and platform.
Integer | 16 32 64 | either smallint, longint or int64
Cardinal | 16 32 64 | either word, longword or qword
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
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
Int64 | 64 bits | -9223372036854775808 .. 9223372036854775807
QWord | 64 bits | 0 .. 18446744073709551615
Comp | 64 bits | -2E64+1 .. 2E63-1