Commonly Used Routines for Null-terminated Strings

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The null-terminated string handling routines cover several functional areas. Within these areas, some are used for the same purpose, the differences being whether or not they use a particular criteria in their calculations.

The following tables list these routines by these functional areas:

• Comparison
• Case conversion
• Modification
• Sub-string
• Copying

Where appropriate, the tables also provide columns indicating whether the routine is case-sensitive, uses the current locale, and/or supports multi-byte character sets.

Null-terminated String Comparison Routines

Routine	Case-sensitive	Uses locale settings	Supports MBCS
System.SysUtils.AnsiStrComp	yes	yes	yes
System.SysUtils.AnsiStrIComp	no	yes	yes
System.SysUtils.AnsiStrLComp	yes	yes	yes
System.SysUtils.AnsiStrLIComp	no	yes	yes
System.SysUtils.StrComp	yes	no	no
System.SysUtils.StrIComp	no	no	no
System.SysUtils.StrLComp	yes	no	no
System.SysUtils.StrLIComp	no	no	no

Null-terminated Case Conversion Routines

Routine	Uses locale settings	Supports MBCS
System.SysUtils.AnsiStrLower	yes	yes
System.SysUtils.AnsiStrUpper	yes	yes
System.SysUtils.StrLower	no	no
System.SysUtils.StrUpper	no	no

Null-terminated String Modification Routines

Routine
System.SysUtils.StrCat
System.SysUtils.StrLCat

Null-terminated Sub-string Routines

Routine	Case-sensitive	Supports MBCS
System.SysUtils.AnsiStrPos	yes	yes
System.SysUtils.AnsiStrScan	yes	yes
System.SysUtils.AnsiStrRScan	yes	yes
System.SysUtils.StrPos	yes	no
System.SysUtils.StrScan	yes	no
System.SysUtils.StrRScan	yes	no

Null-terminated String Copying

Routine
System.SysUtils.StrCopy
System.SysUtils.StrLCopy
System.SysUtils.StrECopy
System.SysUtils.StrMove
System.SysUtils.StrPCopy
System.SysUtils.StrPLCopy

See Also

• Commonly Used Routines for AnsiStrings