System.AnsiStrings.ByteType
Delphi
function ByteType(const S: AnsiString; Index: Integer): TMbcsByteType;
C++
extern DELPHI_PACKAGE System::Sysutils::TMbcsByteType __fastcall ByteType(const System::AnsiString S, int Index)/* overload */;
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| function | public | System.AnsiStrings.pas System.AnsiStrings.hpp |
System.AnsiStrings | System.AnsiStrings |
Description
Indicates whether a byte in a string is a single-byte character, the first byte of a double-byte character, or the second byte of a double-byte character.
Call ByteType to determine whether a specified byte in a string is a single-byte character, the first byte of a multibyte character, or one of the trailing bytes.
AnsiString is the string that contains the byte in question.
Index identifies the byte whose type you want to know. Bytes are numbered from 1.
If the system is not using a multi-byte character system (MBCS), ByteType always returns mbSingleByte. Otherwise, ByteType returns mbSingleByte if the indicated byte represents a complete character in S, mbLeadByte if it represents the first byte of a double-byte character, and mbTrailByte if it represents a subsequent byte of a multibyte character.
Note: No checking is done to ensure that Index is less than the length of S. It is the caller's responsibility to ensure that Index is not out of bounds.