Delphi Data Types for API Integration
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Integer Data Types
Type | Description | Pointer |
---|---|---|
Byte | 8-bit unsigned integer | PByte |
ShortInt | 8-bit signed integer | PShortInt |
Word | 16-bit unsigned integer | PWord |
SmallInt | 16-bit signed integer | PSmallInt |
Cardinal | 32-bit unsigned integer | PCardinal |
LongWord |
32-bit unsigned integer (32-bit Windows, OSX32, 32-bit iOS, and Android platforms) |
PLongWord |
FixedUInt | 32-bit unsigned integer | PFixedUInt |
Integer | 32-bit signed integer | PInteger |
LongInt |
32-bit signed integer (32-bit Windows, OSX32, 32-bit iOS, and Android platforms) |
PLongint |
FixedInt | 32-bit signed integer | PFixedInt |
UInt64 | 64-bit unsigned integer | PUInt64 |
Int64 | 64-bit signed integer | PInt64 |
NativeUInt | 64-bit or 32-bit platform-dependent unsigned integer | PNativeUInt |
NativeInt | 64-bit or 32-bit platform-dependent signed integer | PNativeInt |
Floating-point Data Types
Type | Description | Pointer | Record |
---|---|---|---|
Single | Single precision floating-point value (4 bytes) | PSingle | TSingleRec |
Double | Double precision floating-point value (8 bytes) | PDouble | TDoubleRec |
Extended | Extended precision floating-point value (10 bytes on Win32, but 8 bytes on Win64) See page about multi-device applications. |
PExtended | TExtended80Rec |
Real | Alias of Double | N/A | N/A |
String and Character Data Types
Type | Description | Pointer |
---|---|---|
AnsiChar | ANSI character | PAnsiChar |
Char | Wide character (16-bit) | PChar |
WideChar | 16-bit character | PWideChar |
AnsiString | Represents a dynamically allocated ANSI string whose maximum length is limited only by available memory. | PAnsiString |
RawByteString | Use as a "codepage-agnostic" parameter to a method or function, or as a variable type to store BLOB data. | PRawByteString |
UnicodeString | Unicode string | PUnicodeString |
String | Alias for UnicodeString | PString |
ShortString | A string of maximum 255 characters | PShortString |
WideString | A string of 16-bit characters | PWideString |
File Data Types
Type | Description | Pointer |
---|---|---|
File | File descriptor | |
TextFile, Text | Text file descriptor |
Boolean Data Types
Type | Description | Pointer |
---|---|---|
Boolean | Represents a logical value (true or false). | PBoolean |
ByteBool | Represents an 8-bit logical value. | |
WordBool | Represents a 16-bit logical value. | PWordBool |
LongBool | Represents a 32-bit logical value. | PLongBool |
Other Data Types
Type | Description | Pointer |
---|---|---|
Array | Represents an indexed collection of elements of the same type. | |
Record | Represents a heterogeneous set of elements. | |
Variant | Represents values that can change type at run time. | PVariant |
Pointer | Represents a pointer to data of any type. | PPointer |
Currency | A fixed-point data type used to hold monetary values. | PCurrency |