Pascal Script: Functions

TODO: Review, update links.

This page provides a complete reference of all functions available in the Pascal Script rule within ReNamer, organized by category.

A function generally performs some work, it may take some input parameters, and may produce or return some output. Functions that do not return anything are also known as procedures.

In this document, functions have the following general signature: FunctionName (Parameters): ReturnType, where the parameters and the return type vary by function.

Parameters to function may have prefixes indicating how they're used:

• const — Value is read-only and cannot be modified.
• var — Value can be modified by the function and changes are returned.
• out — Variable receives output from the function.

A common "Wide" prefix in function names indicates that the function works with WideString type for full Unicode support, rather than String or AnsiString type. For example, ShowMessage vs WideShowMessage. See String Types for more information.

Basic String Handling

Function	Description
Insert (Source: String; var S: String; Index: Integer)	Inserts the string S into string Source at position Index.
Delete (var S: String; Index, Count: Integer)	Deletes Count characters from the string S, starting from position Index.
Copy (S: String; Index, Count: Integer): String	Copies Count characters from string S, starting at position Index, and returns them as a new string.
Pos (Substr: String; S: String): Integer	Returns the position of string Substr in string S. Returns 0 if not found.

Note: String indexes are 1-based, so the first character in string S is S[1].

Length Management

Function	Description
SetLength (var S: Array; NewLength: Integer)	Sets the length of array variable S to NewLength.
SetLength (var S: String; NewLength: Integer)	Sets the length of string variable S to NewLength.
SetLength (var S: WideString; NewLength: Integer)	Sets the length of WideString S to NewLength.
Length (const S: Array): Integer	Returns the length of array S (number of elements).
Length (const S: String): Integer	Returns the length of string S (number of characters).
Length (const S: WideString): Integer	Returns the length of WideString S (number of characters).

Wide String Handling

Function	Description
WideInsert (const Substr: WideString; var Dest: WideString; Index: Integer)	Inserts Substr in Dest at position Index.
WideDelete (var S: WideString; Index, Count: Integer)	Deletes Count characters from S, starting from position Index.
WideDeleteRight (var S: WideString; Index, Count: Integer)	Deletes Count characters from S, starting from position Index from the end and counting towards the start. Added in v6.0.0.9 Alpha.
WideSetLength (var S: WideString; NewLength: Integer)	Changes the length of string S to NewLength. If the new length is smaller than the original, the string is truncated. If the new length is larger, the string is expanded but the additional characters will be uninitialized and may contain random data.
WideLength (const S: WideString): Integer	Returns the length of WideString S.
WideCopy (const S: WideString; Index, Count: Integer): WideString	Returns Count characters from S, starting at position Index.
WideCopyRight (const S: WideString; Index, Count: Integer): WideString	Returns Count characters from S, starting at position Index from the end and counting towards the start. Added in v6.0.0.9 Alpha.
WidePos (const SubStr, S: WideString): Integer	Finds the first occurrence of SubStr in S. Returns the position of first occurrence, or 0 if not found.
WidePosEx (const SubStr, S: WideString; Offset: Cardinal): Integer	Finds the first occurrence of SubStr in S starting from position Offset. Returns the position of first occurrence, or 0 if not found.
WideUpperCase (const S: WideString): WideString	Returns the uppercase version of WideString S.
WideLowerCase (const S: WideString): WideString	Returns the lowercase version of WideString S.
WideCompareStr (const S1, S2: WideString): Integer	Compares two WideStrings case-sensitively. Returns a value less than 0 if S1 < S2, 0 if S1 = S2, or greater than 0 if S1 > S2.
WideCompareText (const S1, S2: WideString): Integer	Compares two WideStrings case-insensitively. Returns a value less than 0 if S1 < S2, 0 if S1 = S2, or greater than 0 if S1 > S2.
WideSameText (const S1, S2: WideString): Boolean	Compares two WideStrings case-insensitively. Returns True if identical, otherwise False.
WideTextPos (const SubStr, S: WideString): Integer	Like WidePos but case-insensitive.
WideTextPosEx (const SubStr, S: WideString; Offset: Cardinal): Integer	Like WidePosEx but case-insensitive. Added in v6.6.0.1 Beta.
WideTrim (const S: WideString): WideString	Removes leading and trailing spaces and control characters from string S.
WideTrimChars (const S, CharsToTrim: WideString): WideString	Removes characters that appear in CharsToTrim from the beginning and end of S. Added in v6.0.0.9 Alpha.
WideTrimCharsLeft (const S, CharsToTrim: WideString): WideString	Removes characters that appear in CharsToTrim from the beginning of S. Added in v6.0.0.9 Alpha.
WideTrimCharsRight (const S, CharsToTrim: WideString): WideString	Removes characters that appear in CharsToTrim from the end of S. Added in v6.0.0.9 Alpha.
WideReverseString (const S: WideString): WideString	Returns a reversed version of string S. Added in v6.7.0.4 Beta.
WideRepeatString (const S: WideString; Count: Integer): WideString	Repeats string S the specified number of times. Added in v6.9.0.3 Beta.
WideReplaceStr (const S, OldPattern, NewPattern: WideString): WideString	Replaces all case-sensitive occurrences of OldPattern with NewPattern in string S.
WideReplaceText (const S, OldPattern, NewPattern: WideString): WideString	Replaces all case-insensitive occurrences of OldPattern with NewPattern in string S.
WideSplitString (const Input, Delimiter: WideString): TWideStringArray	Splits Input wherever Delimiter occurs and returns an array of the split parts. The Delimiter can be a multi-character string (not limited to single characters like comma or space). The returned parts do not include the delimiter.
WideJoinStrings (const Strings: TWideStringArray; const Delimiter: WideString): WideString	Joins all items from Strings into a single WideString, with Delimiter inserted between items.
WideCaseSentence (const S: WideString): WideString	Returns sentence case version of S. Only the first alphabetic character is capitalized, all others are lowercase. Added in v6.0.0.3 Alpha.
WideCaseCapitalize (const S: WideString): WideString	Returns title case version of S. First letter of every word is capitalized, all others are lowercase.
WideCaseInvert (const S: WideString): WideString	Inverts the case of all characters in S.

Wide String Array Handling

Function	Description
WideAppendStringArray (var Strings: TWideStringArray; const NewString: WideString)	Adds a WideString to the end of a WideString array. Added in v7.5.0.3 Beta.
WideCopyStringArray (const Strings: TWideStringArray; Index, Count: Integer): TWideStringArray	Copies a portion of a WideString array by taking Count elements starting from Index position. Added in v7.5.0.3 Beta.
WideConcatStringArrays (const A, B: TWideStringArray): TWideStringArray	Concatenates two WideString arrays. Added in v7.5.0.3 Beta.

Wide Character Handling

Function	Description
IsWideCharUpper (WC: WideChar): Boolean	Checks if character WC is uppercase.
IsWideCharLower (WC: WideChar): Boolean	Checks if character WC is lowercase.
IsWideCharDigit (WC: WideChar): Boolean	Checks if character WC is a digit (0-9).
IsWideCharSpace (WC: WideChar): Boolean	Checks if character WC is whitespace (space, tab, newline, carriage return, form feed, vertical tab).
IsWideCharPunct (WC: WideChar): Boolean	Checks if character WC is a punctuation mark.
IsWideCharCntrl (WC: WideChar): Boolean	Checks if character WC is a control character.
IsWideCharBlank (WC: WideChar): Boolean	Checks if character WC is blank (space or tab).
IsWideCharXDigit (WC: WideChar): Boolean	Checks if character WC is a hexadecimal digit (0-9, A-F).
IsWideCharAlpha (WC: WideChar): Boolean	Checks if character WC is alphabetic (a-z, A-Z).
IsWideCharAlphaNumeric (WC: WideChar): Boolean	Checks if character WC is alphanumeric (a-z, A-Z, 0-9).
IsWideWordBoundaryLeft (const Subject: WideString; CharPosition: Integer): Boolean	Checks if a character at the specified position is on a word boundary to the left. A word boundary to the left exists if: (1) it's the first character and is a word character, or (2) it's between a word character and a non-word character. Added in v6.6.0.1 Beta.
IsWideWordBoundaryRight (const Subject: WideString; CharPosition: Integer): Boolean	Checks if a character at the specified position is on a word boundary to the right. A word boundary to the right exists if: (1) it's the last character and is a word character, or (2) it's between a word character and a non-word character. Added in v6.6.0.1 Beta.
WideCharUpper (const WC: WideChar): WideChar	Returns uppercase version of the character. Non-alphabetic characters are returned unchanged.
WideCharLower (const WC: WideChar): WideChar	Returns lowercase version of the character. Non-alphabetic characters are returned unchanged.
WideChr (Code: Word): WideChar	Creates a character from a Unicode code point. Added in v6.9.0.3 Beta.

Note: Character classifications (C1_UPPER, C1_LOWER, C1_DIGIT, C1_SPACE, C1_PUNCT, C1_CNTRL, C1_BLANK, C1_XDIGIT, C1_ALPHA) are part of Unicode definitions. More information can be found at fileformat.info.

Unicode Conversion

Function	Description
WideToAnsi (const WS: WideString): String	Converts WideString to AnsiString. In v7.0 and later, this conversion happens automatically on assignment.
AnsiToWide (const S: String): WideString	Converts AnsiString to WideString. In v7.0 and later, this conversion happens automatically on assignment.
UTF8Encode (const WS: WideString): String	Converts WideString to UTF-8 encoded string.
UTF8Decode (const S: String): WideString	Converts UTF-8 encoded string to WideString.
WinCPToUTF8 (const S: String): String	Converts a string encoded with the active system code page to UTF-8. Added in v7.4.0.3 Beta.
UTF8ToWinCP (const S: String): String	Converts UTF-8 encoded string to a string encoded with the active system code page. Added in v7.4.0.3 Beta.

See String Types for additional information on default encoding and conversion procedures.

Console Output Conversion

OEM-defined character set is commonly used in console application output.

Function	Description
OemToAnsi (const S: String): String	Converts OEM string to ANSI string. Added in v6.6.0.2 Beta.
OemToWide (const S: String): WideString	Converts OEM string to WideString. Added in v6.6.0.2 Beta.
AnsiToOem (const S: String): String	Converts ANSI string to OEM string. Added in v6.6.0.2 Beta.
WideToOem (const S: WideString): String	Converts WideString to OEM string. Added in v6.6.0.2 Beta.

Basic Conversion

Function	Description
BoolToStr (B: Boolean): String	Converts boolean value to string. Returns "True" or "False".
IntToStr (Value: Integer): String	Converts an integer to string. For example, IntToStr(123) returns '123' string. Warning: Be cautious when passing Int64 values. They will be automatically type cast to Integer, which significantly reduces the range of possible values (see Types for details). For Int64 values, use Int64ToStr or FormatFloat to avoid range loss.
Int64ToStr (Value: Int64): String	Converts an Int64 value to string.
StrToInt (const S: String): Integer	Converts a string to integer. For example, StrToInt('123') returns 123 integer. Warning: Raises an error if the string cannot be converted to an integer.
StrToInt64 (const S: String): Int64	Converts a string to Int64. Raises an error if conversion fails.
StrToIntDef (const S: String; const Default: Integer): Integer	Converts a string to integer. Returns Default value if conversion fails instead of raising an error.
StrToInt64Def (const S: String; Default: Int64): Int64	Converts a string to Int64. Returns Default value if conversion fails.
TryStrToInt (const S: String; out Value: Integer): Boolean	Converts a string to integer. Returns False if conversion fails instead of raising an error. The converted value is stored in Value parameter.
FloatToStr (Value: Extended): String	Converts floating point value to string using default system format.
StrToFloat (const S: String): Extended	Converts string to floating point value. Raises an error if conversion fails.
StrToFloatDef (const S: String; const Default: Extended): Extended	Converts string to floating point value. Returns Default value if conversion fails.
FormatFloat (const Format: String; Value: Extended): String	Converts floating point value to string using custom format. See floating point format specifiers below.
DateToStr (D: TDateTime): String	Converts date to string using system short date format (e.g., dd/mm/yyyy).
StrToDate (const S: String): TDateTime	Converts date string to TDateTime using system short date format (e.g., dd/mm/yyyy).
IntToHex (Value: Integer; Digits: Integer): String	Converts integer to hexadecimal representation. The Digits parameter specifies minimum number of digits (padded with zeros if needed). Examples: • IntToHex(1234, 1) returns '4D2' • IntToHex(1234, 8) returns '000004D2'
HexToInt (const HexNum: String): Integer	Converts hexadecimal string to integer. Raises an error if conversion fails.
HexToIntDef (const HexNum: String; Default: Integer): Integer	Converts hexadecimal string to integer. Returns Default value if conversion fails.
IntToRoman (Value: Integer): String	Converts decimal number to Roman numerals. Added in v7.3.0.4 Beta.
RomanToInt (const S: String): Integer	Converts Roman numerals to decimal number. Added in v7.3.0.4 Beta.
RomanToIntDef (const S: String; Default: Integer): Integer	Converts Roman numerals to decimal number. Returns Default if conversion fails. Added in v7.3.0.4 Beta.
TryRomanToInt (const S: String; out Value: Integer): Boolean	Converts Roman numerals to decimal number. Returns False if conversion fails instead of raising an error. Added in v7.3.0.4 Beta.
Ord (X: Char): Byte	Returns ordinal value (byte representation) of a character.
Chr (X: Byte): Char	Returns a character from its ordinal value (byte representation).

Floating point format specifiers

Specifier	Description
0 (zero)	Digit placeholder. If a digit exists in this position, it's copied to output, otherwise a "0" is inserted.
# (hash)	Digit placeholder. If a digit exists in this position, it's copied to output, otherwise nothing is inserted.
. (dot)	Decimal point. The first "." determines the decimal separator location. Additional "." characters are ignored.
, (comma)	Thousand separator. Inserts separators between each group of three digits to the left of the decimal point.

Date and Time

Function	Description
Date: TDateTime	Returns the current system date.
Time: TDateTime	Returns the current system time.
Now: TDateTime	Returns the current system date and time.
EncodeDate (Year, Month, Day: Word): TDateTime	Creates a date value from year, month, and day components. Valid ranges: Year = 0..9999, Month = 1..12, Day = 1..31 (depending on month/year). Raises an error if parameters are invalid.
EncodeTime (Hour, Min, Sec, MSec: Word): TDateTime	Creates a time value from hour, minute, second, and millisecond components. Valid ranges: Hour = 0..23, Min = 0..59, Sec = 0..59, MSec = 0..999. Raises an error if parameters are invalid.
EncodeDateTime (Year, Month, Day, Hour, Minute, Second, MilliSecond: Word): TDateTime	Creates a date-time value from date and time components. Similar to combining EncodeDate and EncodeTime. Added in v6.2.0.5 Beta.
TryEncodeDate (Year, Month, Day: Word; var Date: TDateTime): Boolean	Like EncodeDate but returns True/False instead of raising an error. If successful, the generated date value is written to the Date parameter.
TryEncodeTime (Hour, Min, Sec, MSec: Word; var Time: TDateTime): Boolean	Like EncodeTime but returns True/False instead of raising an error. If successful, the generated time value is written to the Time parameter.
TryEncodeDateTime (Year, Month, Day, Hour, Minute, Second, MilliSecond: Word; out ADateTime: TDateTime): Boolean	Like EncodeDateTime but returns True/False instead of raising an error. If successful, the generated date-time value is written to the ADateTime parameter. Added in v6.2.0.5 Beta.
DecodeDate (const DateTime: TDateTime; var Year, Month, Day: Word)	Extracts year, month, and day components from a TDateTime value.
DecodeTime (const DateTime: TDateTime; var Hour, Min, Sec, MSec: Word)	Extracts hour, minute, second, and millisecond components from a TDateTime value.
DecodeDateTime (const DateTime: TDateTime; out Year, Month, Day, Hour, Minute, Second, MilliSecond: Word)	Extracts both date and time components from a TDateTime value. Added in v6.2.0.5 Beta.
ComposeDateTime (const Date, Time: TDateTime): TDateTime	Combines separate date and time values into a single TDateTime value. Added in v6.2.0.5 Beta.
DateTimeToUnix (D: TDateTime): Int64	Converts TDateTime value to Unix timestamp.
UnixToDateTime (U: Int64): TDateTime	Converts Unix timestamp to TDateTime value.
FormatDateTime (const Format: String; DateTime: TDateTime): String	Converts date and time to string using a custom date and time format.
ScanDateTime (const Pattern, Subject: String): TDateTime	Parses a date/time string according to a date and time format pattern. Added in v7.1.0.3 Beta.
TryScanDateTime (const Pattern, Subject: String; out DateTime: TDateTime): Boolean	Like ScanDateTime but returns True/False instead of raising an error. Added in v7.1.0.3 Beta.
IncYear (const AValue: TDateTime; const ANumberOfYears: Integer): TDateTime	Adds or subtracts years from a TDateTime value.
IncMonth (const AValue: TDateTime; ANumberOfMonths: Integer): TDateTime	Adds or subtracts months from a TDateTime value.
IncWeek (const AValue: TDateTime; const ANumberOfWeeks: Integer): TDateTime	Adds or subtracts weeks from a TDateTime value.
IncDay (const AValue: TDateTime; const ANumberOfDays: Integer): TDateTime	Adds or subtracts days from a TDateTime value.
IncHour (const AValue: TDateTime; const ANumberOfHours: Int64): TDateTime	Adds or subtracts hours from a TDateTime value.
IncMinute (const AValue: TDateTime; const ANumberOfMinutes: Int64): TDateTime	Adds or subtracts minutes from a TDateTime value.
IncSecond (const AValue: TDateTime; const ANumberOfSeconds: Int64): TDateTime	Adds or subtracts seconds from a TDateTime value.
IncMilliSecond (const AValue: TDateTime; const ANumberOfMilliSeconds: Int64): TDateTime	Adds or subtracts milliseconds from a TDateTime value.
SecondSpan (const ANow, AThen: TDateTime): Double	Calculates approximate number of seconds between two date-time values. Added in v6.2.0.5 Beta.
DayOfWeek (const DateTime: TDateTime): Word	Returns day number of the week (1=Monday, 2=Tuesday, 3=Wednesday, 4=Thursday, 5=Friday, 6=Saturday, 7=Sunday). Before v6.1 this function returned 1=Sunday to 7=Saturday.
DayOfMonth (const DateTime: TDateTime): Word	Returns the day number of the month. Added in v6.1.
DayOfYear (const DateTime: TDateTime): Word	Returns the day number of the year. Added in v6.1.
WeekOfMonth (const DateTime: TDateTime): Word	Returns the week number of the month. Added in v6.1.
WeekOfYear (const DateTime: TDateTime): Word	Returns the week number of the year. Added in v6.1.

File Management

Function	Description
WideFileSize (const FileName: WideString): Int64	Returns file size in bytes. Returns -1 if file does not exist.
WideFileExists (const FileName: WideString): Boolean	Checks if specified file exists.
WideDirectoryExists (const Directory: WideString): Boolean	Checks if specified directory exists.
WideForceDirectories (const Dir: WideString): Boolean	Ensures all directories in the path exist, creating them recursively if needed. Returns True if all folders exist or were successfully created.
WideCreateDir (const Dir: WideString): Boolean	Creates specified directory (non-recursive). Returns True on success.
WideRemoveDir (const Dir: WideString): Boolean	Removes a directory if it is empty. Returns True on success. Added in v6.4.0.1 Beta.
WideDeleteFile (const FileName: WideString): Boolean	Deletes file from disk. Returns True on success.
WideDeleteToRecycleBin (const FileName: WideString): Boolean	Moves file or folder to Recycle Bin. Returns True on success. Full path must be provided (a quirk of Windows API). Added in v6.4.0.1 Beta.
WideRenameFile (const OldName, NewName: WideString): Boolean	Renames file from OldName to NewName. Returns True on success.
WideCopyFile (const FromFile, ToFile: WideString; FailIfExists: Boolean): Boolean	Copies file from FromFile to ToFile. If FailIfExists is True, operation fails when destination exists; otherwise destination is overwritten. Returns True on success.
WideFileSearch (const Name, DirList: WideString): WideString	Searches for a file named Name in directories listed in DirList (semicolon-delimited list of path names). Returns full path if found, empty string otherwise.
WideScanDirForFiles (const Dir: WideString; var Files: TWideStringArray; const Recursive, IncludeHidden, IncludeSystem: Boolean; const Mask: WideString)	Scans a directory for files and returns the list in the Files array. • Dir — Directory to scan • Files — Array to receive the file list • Recursive — Scan subdirectories • IncludeHidden — Include hidden files • IncludeSystem — Include system files • Mask — Wildcard mask to filter files, or empty string for all files
WideScanDirForFolders (const Dir: WideString; var Folders: TWideStringArray; const Recursive, IncludeHidden, IncludeSystem: Boolean)	Scans a directory for folders and returns the list in the Folders array. • Dir — Directory to scan • Folders — Array to receive the folder list • Recursive — Scan subdirectories • IncludeHidden — Include hidden folders • IncludeSystem — Include system folders

File Name Utilities

Function	Description
WideExtractFilePath (const FileName: WideString): WideString	Returns drive and directory portion with trailing path delimiter (e.g., "C:\Folder\").
WideExtractFileDir (const FileName: WideString): WideString	Returns drive and directory portion without trailing path delimiter (e.g., "C:\Folder").
WideExtractFileDrive (const FileName: WideString): WideString	Returns the drive letter (e.g., "C:").
WideExtractFileName (const FileName: WideString): WideString	Returns filename with extension (e.g., "Document.txt").
WideExtractBaseName (const FileName: WideString): WideString	Returns filename without extension or path (e.g., "Document.txt" → "Document", "C:\Folder\Document.txt" → "Document").
WideExtractFileExt (const FileName: WideString): WideString	Returns file extension with dot (e.g., ".txt").
WideChangeFileExt (const FileName, Extension: WideString): WideString	Replaces file extension (e.g., "File.txt" → "File.pdf").
WideStripExtension (const FileName: WideString): WideString	Removes extension while preserving path (e.g., "Document.txt" → "Document", "C:\Folder\Document.txt" → "C:\Folder\Document").
WideExpandFileName (const FileName: WideString): WideString	Converts relative filename to fully qualified path. Does not verify file existence.
WideExtractRelativePath (const BaseName, DestName: WideString): WideString	Creates relative path from BaseName to DestName. For example, going from "C:\Folder\File.txt" to "C:\Documents\Article.pdf" returns "..\Documents\Article.pdf".
WideExtractShortPathName (const FileName: WideString): WideString	Converts path to DOS 8.3 format.
WideIncludeTrailingPathDelimiter (const S: WideString): WideString	Ensures path ends with path delimiter ("\").
WideExcludeTrailingPathDelimiter (const S: WideString): WideString	Ensures path does not end with path delimiter ("\").
WideSameFileName (const FileName1, FileName2: WideString): Boolean	Compares filenames for equality. On Windows, filenames are case-insensitive for comparison purposes but case-preserving when creating new files. Added in v6.7.0.4 Beta.
WideMatchesMask (const FileName, Mask: WideString): Boolean	Checks if filename matches wildcard mask (e.g., "*.txt"). Added in v6.7.0.4 Beta.
WideMatchesMaskList (const FileName, MaskList: WideString): Boolean	Checks if filename matches any wildcard mask in semicolon-separated list (e.g., "*.txt;*.doc"). Added in v6.7.0.4 Beta.

File Read/Write

Function	Description
FileReadFragment (const FileName: WideString; Start, Length: Integer): String	Reads Length number of characters from file starting at position Start (0-based, so 0 is the beginning of the file).
FileReadLines (const FileName: WideString): TAnsiStringArray	Reads all lines from a file and returns as array. Added in v5.74.4 Beta.
FileReadLine (const FileName: WideString; LineNum: Integer): String	Reads a specific line from file by line number (1-based, so 1 is the first line). Note: This function is extremely inefficient and provided only for convenience. Avoid using it repeatedly.
FileCountLines (const FileName: WideString): Integer	Counts the number of lines in a file. Note: This function is extremely inefficient and provided only for convenience. Avoid using it repeatedly.
FileReadContent (const FileName: WideString): String	Returns entire file content as a string.
FileWriteContent (const FileName: WideString; const Content: String)	Writes content to file, overwriting if file exists.
FileAppendContent (const FileName: WideString; const Content: String)	Appends content to end of file, creating file if it doesn't exist.
FileReadText (const FileName: WideString): WideString	Reads text from file with automatic encoding detection. Added in v6.6.0.6 Beta.
FileReadTextLines (const FileName: WideString): TWideStringArray	Reads text lines from file with automatic encoding detection. Added in v6.7.0.1 Beta.

Note: Automatic encoding detection is based on byte order mark (BOM) and supports UTF-8, UTF-16BE, and UTF-16LE. Files without BOM are interpreted as ANSI encoding.

File Time

Function	Description
FileTimeModified (const FileName: WideString): TDateTime	Returns last modified time of file.
FileTimeCreated (const FileName: WideString): TDateTime	Returns creation time of file.
SetFileTimeCreated (const FileName: WideString; const DateTime: TDateTime): Boolean	Sets creation time of file.
SetFileTimeModified (const FileName: WideString; const DateTime: TDateTime): Boolean	Sets last modified time of file.

Meta Tags Extraction

Function	Description
CalculateMetaTag (const FilePath: WideString; const MetaTagName: String): WideString	Extracts meta tag value from file. Return type changed from String to WideString in v5.74.4 Beta.
CalculateMetaTagFormat (const FilePath: WideString; const MetaTagName, DateTimeFormat: String): WideString	Same as CalculateMetaTag but with custom date and time format instead of application default. Added in v5.74.4 Beta.

Example usage:

begin
  FileName := CalculateMetaTag(FilePath, 'EXIF_Date');
end.

The full list of meta tags can be found in the Meta Tags article. For date/time formatting see Date and Time format article.

Regular Expressions

Function	Description
IsMatchingRegEx (const Input, Pattern: WideString; const CaseSensitive: Boolean): Boolean	Checks if input matches a regular expression pattern. Added in v5.74.4 Beta.
ReplaceRegEx (const Input, Find, Replace: WideString; const CaseSensitive, UseSubstitution: Boolean): WideString	Finds and replaces all regex pattern matches. Works like the Regular Expressions rule. • Input — Original subject text • Find — Search pattern • Replace — Replacement pattern • CaseSensitive — Search in case-sensitive mode • UseSubstitution — Substitute backreferences in replacement pattern
FindRegEx (const Input, Find: WideString; const CaseSensitive: Boolean; out Positions: TIntegerArray; out Matches: TWideStringArray): Integer	Finds all matches and positions of a regex pattern. Returns the number of matches found. • Input — Original subject text • Find — Search pattern • CaseSensitive — Search in case-sensitive mode • Positions — Receives positions where matches were found • Matches — Receives the matched strings Added in v7.3.0.4 Beta.
MatchesRegEx (const Input, Find: WideString; const CaseSensitive: Boolean): TWideStringArray	Returns array of full regex matches (not sub-patterns). The function matches the entire expression.
SubMatchesRegEx (const Input, Find: WideString; const CaseSensitive: Boolean): TWideStringArray	Returns array of sub-expression matches for the first full match only. This can be combined with MatchesRegEx to find all global matches, then parse each match through SubMatchesRegEx to extract individual sub-expression matches.

Example matches for MatchesRegEx and SubMatchesRegEx:

Input	Pattern	MatchesRegEx	SubMatchesRegEx
A1_B2_C3	[A-Z]\d	A1, B2, C3	(empty)
A1_B2_C3	([A-Z])(\d)	A1, B2, C3	A, 1

Process Execution

Function	Description
ShellOpenFile (const FileName: WideString): Boolean	Opens a file with its associated application. Works like "Start > Run". The parameter can be a file path, URL, or any registered protocol. For example, you can open a Word document or web page and the associated application will launch. Warning: This function evaluates the command and may produce unexpected results. For example, ShellOpenFile('notepad') could run Windows Notepad from C:\Windows\notepad.exe, a different notepad.exe found in the PATH environment variable, or even open a folder named "notepad" in the current directory.
ExecuteProgram (const Command: String; WaitForProgram: Boolean): Cardinal	Executes a command. The WaitForProgram parameter specifies whether to wait for the program to finish before continuing. Returns exit code.
ExecuteProgramShow (const Command: String; WaitForProgram: Boolean; ShowWindowFlag: Word): Cardinal	Executes a command with control over window visibility. Returns exit code. • Command — Command to execute • WaitForProgram — Wait for program to finish before continuing • ShowWindowFlag — Window display mode:   ◦ 0 = Hide window   ◦ 1 = Normal (activate and display)   ◦ 2 = Minimized (activate)   ◦ 3 = Maximized (activate)   ◦ 4 = Show without activating   ◦ 7 = Minimized without activating   ◦ More information: ShowWindow API function Added in v5.75.3 Beta.
ExecConsoleApp (const CommandLine: String; out Output: String): Cardinal	Executes a console application and captures its standard output in the Output variable. Returns the exit code. This function should be used only for console applications. Console applications use OEM encoding by default unless they change their own output code page. Use OemToAnsi or OemToWide functions to convert the output if needed. Prior to v6.6.0.2 Beta, OEM to ANSI conversion was applied automatically. Since v6.6.0.2 Beta, output is returned unmodified to prevent corruption of binary or non-OEM encoded data.

Dialogs

Function	Description
ShowMessage (const Msg: String)	Shows message dialog with OK button.
WideShowMessage (const Msg: WideString)	Same as ShowMessage but with Unicode text support.
DialogYesNo (const Msg: String): Boolean	Shows Yes/No dialog. Returns True if user clicks Yes.
WideDialogYesNo (const Msg: WideString): Boolean	Same as DialogYesNo but with Unicode text support.
InputBox (const ACaption, APrompt, ADefault: String): String	Shows input dialog with text box. If user clicks OK, returns the entered value, otherwise returns the default value.
InputQuery (const ACaption, APrompt: String; var Value: String): Boolean	Shows input dialog. Returns True if user clicks OK. The entered value is stored in the Value parameter.
WideInputBox (const ACaption, APrompt, ADefault: WideString): WideString	Same as InputBox but with Unicode text support.
WideInputQuery (const ACaption, APrompt: WideString; var Value: WideString): Boolean	Same as InputQuery but with Unicode text support.

Application

Function	Description
GetApplicationPath: WideString	Returns full path to ReNamer executable (e.g., "C:\Program Files\ReNamer\ReNamer.exe").
GetApplicationParams: TWideStringArray	Returns array of command line parameters passed to the application at launch.
GetCurrentFileIndex: Integer	Returns index of current file being processed (ranges from 1 to GetTotalNumberOfFiles).
GetTotalNumberOfFiles: Integer	Returns total number of files in the list.
GetCurrentMarkedFileIndex: Integer	Returns index of current file among marked files only (ranges from 1 to GetTotalNumberOfMarkedFiles).
GetTotalNumberOfMarkedFiles: Integer	Returns total number of marked files.
GetAllFiles: TWideStringArray	Returns file paths of all files in the list. Added in v5.74.2 Beta.
GetMarkedFiles: TWideStringArray	Returns file paths of all marked files. Added in v5.74.2 Beta.

Global Variables

Global variables allow efficient storage and exchange of information between script executions.

Variables persist until manually cleared or application terminates. To clear variables at each preview, use script initialization.

Added in v7.4.0.2 Beta.

Function	Description
SetGlobalVar (const Name: String; Value: Variant)	Sets a global variable.
GetGlobalVar (const Name: String): Variant	Gets a global variable. Returns Unassigned value if variable doesn't exist.
GetGlobalVarDef (const Name: String; Default: Variant): Variant	Gets a global variable. Returns Default value if variable doesn't exist.
HasGlobalVar (const Name: String): Boolean	Checks if a global variable exists.
GetGlobalVarCount: Integer	Returns total number of global variables.
GetGlobalVarNames: TAnsiStringArray	Returns names of all global variables.
ClearGlobalVar (const Name: String)	Clears a specific global variable.
ClearGlobalVars	Clears all global variables.

System

Function	Description
WideGetCurrentDir: WideString	Returns current working directory.
WideSetCurrentDir (const Dir: WideString): Boolean	Sets current working directory.
WideGetTempPath: WideString	Returns system temporary directory. Returns empty string if path cannot be determined.
WideGetEnvironmentVar (const VarName: WideString): WideString	Returns environment variable value by name (e.g., "USERNAME", "COMPUTERNAME").

Miscellaneous

Function	Description
Error (const Message: String)	Terminates script with error message. Added in v7.2.0.7 Beta.
Sleep (Milliseconds: Cardinal)	Pauses script execution for specified milliseconds.
DivMod (Dividend: Integer; Divisor: Word; var Result, Remainder: Word)	Performs integer division and returns both quotient and remainder in a single operation. • Dividend — The value being divided • Divisor — The value to divide by • Result — Receives the quotient (result of division) • Remainder — Receives the remainder (the difference between Result * Divisor and Dividend)
Randomize	Initializes random number generator. Should only be called once per session.
RandomRange (const AFrom, ATo: Integer): Integer	Returns random integer from AFrom (inclusive) to ATo (exclusive). For example, RandomRange(1, 10) returns a value between 1 and 9, inclusive.
RandomFloat: Extended	Returns random floating point value from 0.0 (inclusive) to 1.0 (exclusive). Added in v6.2.0.8 Beta.
RandomBoolean: Boolean	Returns random boolean value (True or False). Added in v6.2.0.8 Beta.
RandomString (Len: Integer; const Chars: String): String	Generates random string of length Len using characters from Chars. Added in v6.7.0.4 Beta.
MinInt (const A, B: Integer): Integer	Returns smaller of two Integer values. Added in v6.2.0.8 Beta.
MinInt64 (const A, B: Int64): Int64	Returns smaller of two Int64 values. Added in v6.2.0.8 Beta.
MinFloat (const A, B: Extended): Extended	Returns smaller of two Extended values. Added in v6.2.0.8 Beta.
MaxInt (const A, B: Integer): Integer	Returns larger of two Integer values. Added in v6.2.0.8 Beta.
MaxInt64 (const A, B: Int64): Int64	Returns larger of two Int64 values. Added in v6.2.0.8 Beta.
MaxFloat (const A, B: Extended): Extended	Returns larger of two Extended values. Added in v6.2.0.8 Beta.
GetClipboardText: WideString	Returns text content from clipboard.
SetClipboardText (const S: WideString)	Sets text content to clipboard.
Base64Encode (const S: String): String	Encodes string to Base64 format. Useful for encoding binary data to minimize the likelihood of corruption when transmitted through systems like email or web.
Base64Decode (const S: String): String	Decodes Base64 encoded string.
URLEncode (const Str: WideString; UsePlusAsSpace: Boolean): String	Encodes string for URL use. The input string is first encoded to UTF-8, then all characters except digits and Latin letters are encoded as %XX hex sequences. If UsePlusAsSpace is True, spaces are encoded as plus signs ("+") instead of "%20" (for compatibility with some decoders like PHP). Added in v5.74.4 Beta.
URLDecode (const Str: String; UsePlusAsSpace: Boolean): WideString	Decodes URL encoded string. All %XX hex sequences are decoded, then the entire string is decoded from UTF-8. If UsePlusAsSpace is True, plus signs ("+") are interpreted as spaces (for compatibility with some encoders like PHP). Added in v5.74.4 Beta. UsePlusAsSpace parameter added in v6.7.0.1 Beta.
GetTickCount: Cardinal	Returns milliseconds since system start (resets after ~49.7 days). Limited precision.
SizeOf (X): Integer	Returns number of bytes used to represent a variable or type. Pass a variable to get its size, or pass a type identifier to get the size of that type.