C++Builder How To Include And Exclude Path Delimiters On Windows

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How To Include And Exclude Path Delimiters On Windows
By Yilmaz Yoru September 24, 2021

How can I add path delimiter to a path string? How can I remove path delimiter from the end of path string? What is the C++ ExcludeTrailingPathDelimiter? What is IncludeTrailingPathDelimiter method? What is the difference between ExcludeTrailingBackslash and ExcludeTrailingPathDelimiter methods? What is the difference between IncludeTrailing PathDelimiter and IncludeTrailing PathDelimiter methods?

C++ Builder has a lot of specific methods in its Для просмотра ссылки Войди или Зарегистрируйся library that is included in vcl and fmx libraries. Some of these are grouped as a Для просмотра ссылки Войди или Зарегистрируйся that allows user to edit, extract, get and set drive name, directory name, file name and file extensions. These methods are combined in Для просмотра ссылки Войди или Зарегистрируйся, Для просмотра ссылки Войди или Зарегистрируйся, Для просмотра ссылки Войди или Зарегистрируйсяlibraries. These all methods are easy to use and easy to get or set file path strings in that operating system. These can be used with other component properties like FileName property of OpenDialog, SaveDialog components. We can also check drives, files or directories to see if they are exist or not on a given path. We can include and exclude path delimiters on Windows.

Where can I see more examples of the Path Manipulation routines?​

Go to this tag search: Для просмотра ссылки Войди или Зарегистрируйся

What is the C++ ExcludeTrailingPathDelimiter method ?​

The Для просмотра ссылки Войди или Зарегистрируйся Method (System.SysUtils.ExcludeTrailingPathDelimiter) is a SysUtils Method that returns a path name without a trailing delimiter. In another terms this method returns UnicodeString, with the trailing path delimiter (Для просмотра ссылки Войди или Зарегистрируйся, ‘\’ on Windows, ‘/’ otherwise) removed. If the last character in S is not a delimiter, then S is returned unchanged. Note that ExcludeTrailingPathDelimiter works with multibyte character sets (MBCS).

Platform	Sample Input (S)	Output
Windows	C:\Your\Input\Path C:\Your\Input\Path\	C:\Your\Input\Path C:\Your\Input\Path
OS X iOS Android Linux	/Your/Input/Path /Your/Input/Path/	/Your/Input/Path /Your/Input/Path

What is the syntax of ExcludeTrailingPathDelimiter method ?​

Here is the ExcludeTrailingPathDelimiter Method:

UnicodeString __fastcall ExcludeTrailingPathDelimiter(const System::UnicodeString S); // overload

What is the C++ IncludeTrailingPathDelimiter method ?​

IncludeTrailingPathDelimiter Method (System.SysUtils.IncludeTrailingPathDelimiter) is a SysUtils Method that ensures that path name ends with a delimiter. In other terms this method ensures that a path name ends with a trailing path delimiter (Для просмотра ссылки Войди или Зарегистрируйся, ‘\’ on Windows, ‘/’ otherwise). If S already ends with a trailing delimiter character, it is returned unchanged; otherwise, S is returned with an appended delimiter character. Note that IncludeTrailingPathDelimiter works with multibyte character sets (MBCS).

Platform	Sample Input (S)	Output
Windows	C:\Your\Input\Path C:\Your\Input\Path\	C:\Your\Input\Path\ C:\Your\Input\Path\
OS X iOS Android Linux	/Your/Input/Path /Your/Input/Path/	/Your/Input/Path/ /Your/Input/Path/

What is the syntax of IncludeTrailingPathDelimiter method?​

Here is the IncludeTrailingPathDelimiter Method:

UnicodeString __fastcall IncludeTrailingPathDelimiter(const System::UnicodeString S); // overload

What are the simple examples of using the C++ ExcludeTrailingPathDelimiter and IncludeTrailingPathDelimiter methods?​

ExcludeTrailingPathDelimiter and IncludeTrailingPathDelimiter methods return UnicodeString, we can use them as given below,

 String path1 = IncludeTrailingPathDelimiter( L"D:\\MyFolder" );
 ShowMessage(path1);
 
 String path2 = ExcludeTrailingPathDelimiter( L"D:\\MyFolder\\" );
 ShowMessage(path2);

and the outputs will be as follows respectively,

D:\MyFolder\

and,

D:\MyFolder

Here is a full example of the C++ ExcludeTrailingBackslash and IncludeTrailingBackslash methods​

Here is the example how we check if a directory exists or not,

#include <vcl.h>
#pragma hdrstop
 
#include "Include_Exclude_Path_Delimiters_Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner) : TForm(Owner)
{
 String path1, path2, path;
 
 path1 = L"D:\\MyFolder";
 path2 = L"D:\\MyFolder\\";
 
 Memo1->Lines->Add( "Path: " + path1 );
 path = IncludeTrailingPathDelimiter( path1 );
 Memo1->Lines->Add( "IncludeTrailingBackslash: " + path );
 
 Memo1->Lines->Add( "Path: " + path2 ) ;
 path = ExcludeTrailingPathDelimiter( path2 );
 Memo1->Lines->Add( "IncludeTrailingBackslash: " + path );
 
 Memo1->Lines->Add( "Path: " + path1 );
 path = IncludeTrailingBackslash( path1 );
 Memo1->Lines->Add( "IncludeTrailingDelimiter: " + path );
 
 Memo1->Lines->Add( "Path: " + path2 ) ;
 path = ExcludeTrailingBackslash( path2 );
 Memo1->Lines->Add( "IncludeTrailingDelimiter: " + path );
}