PathCanonicalize function
Removes elements of a file path according to special strings inserted into that path.
Syntax
BOOL PathCanonicalize( __out LPTSTR lpszDst, __in LPCTSTR lpszSrc );
Parameters
- lpszDst [out]
-
Type: LPTSTR
A pointer to a string that receives the canonicalized path. You must set the size of this buffer to MAX_PATH to ensure that it is large enough to hold the returned string.
- lpszSrc [in]
-
Type: LPCTSTR
A pointer to a null-terminated string of maximum length MAX_PATH that contains the path to be canonicalized.
Return value
Type: BOOL
Returns TRUE if a result has been computed and the content of the lpszDst output buffer is valid. Returns FALSE otherwise, and the contents of the buffer pointed to by lpszDst are invalid. To get extended error information, call GetLastError.
Remarks
This function allows the user to specify what to remove from a path by inserting special character sequences into the path. The ".." sequence indicates to remove a path segment from the current position to the previous path segment. The "." sequence indicates to skip over the next path segment to the following path segment. The root segment of the path cannot be removed.
If there are more ".." sequences than there are path segments, the function returns TRUE and contents of the buffer pointed to by lpszDst contains just the root, "\".
Examples
#include <windows.h>
#include <iostream.h>
#include "Shlwapi.h"
void main( void )
{
// Path_1 destination buffer.
char buffer_1[MAX_PATH] = "JustABufferToHoldTheCanonicalizedPathForAnExample";
char *lpStr1;
lpStr1 = buffer_1;
// Path_2 to be Canonicalized.
char buffer_2[ ] = "A:\\name_1\\.\\name_2\\..\\name_3";
char *lpStr2;
lpStr2 = buffer_2;
// Path_3 to be Canonicalized.
char buffer_3[ ] = "A:\\name_1\\..\\name_2\\.\\name_3";
char *lpStr3;
lpStr3 = buffer_3;
// Path_4 to be Canonicalized.
char buffer_4[ ] = "A:\\name_1\\name_2\\.\\name_3\\..\\name_4";
char *lpStr4;
lpStr4 = buffer_4;
// Path_5 to be Canonicalized.
char buffer_5[ ] = "A:\\name_1\\.\\name_2\\.\\name_3\\..\\name_4\\..";
char *lpStr5;
lpStr5 = buffer_5;
// Path_6 to be Canonicalized.
char buffer_6[ ] = "C:\\..";
char *lpStr6;
lpStr6 = buffer_6;
cout << "The un-canonicalized path 2 is : " << lpStr2
<< "\nThe return value is : "
<< PathCanonicalize(lpStr1,lpStr2)
<< "\nThe canonicalized path 1 is : " << lpStr1 << endl;
cout << "\nThe un-canonicalized path 3 is : " << lpStr3
<< "\nThe return value is : "
<< PathCanonicalize(lpStr1,lpStr3)
<< "\nThe canonicalized path 1 is : " << lpStr1 << endl;
cout << "\nThe un-canonicalized path 4 is : " << lpStr4
<< "\nThe return value is : "
<< PathCanonicalize(lpStr1,lpStr4)
<< "\nThe canonicalized path 1 is : " << lpStr1 << endl;
cout << "\nThe un-canonicalized path 5 is : " << lpStr5
<< "\nThe return value is : "
<< PathCanonicalize(lpStr1,lpStr5)
<< "\nThe canonicalized path 1 is : " << lpStr1 << endl;
cout << "\nThe un-canonicalized path 6 is : " << lpStr6
<< "\nThe return value is : "
<< PathCanonicalize(lpStr1,lpStr6)
<< "\nThe canonicalized path 1 is : " << lpStr1 << endl;
}
OUTPUT:
---------
The un-canonicalized path 2 is : A:\name_1\.\name_2\..\name_3
The return value is : 1
The canonicalized path 1 is : A:\name_1\name_3
The un-canonicalized path 3 is : A:\name_1\..\name_2\.\name_3
The return value is : 1
The canonicalized path 1 is : A:\name_2\name_3
The un-canonicalized path 4 is : A:\name_1\name_2\.\name_3\..\name_4
The return value is : 1
The canonicalized path 1 is : A:\name_1\name_2\name_4
The un-canonicalized path 5 is : A:\name_1\.\name_2\.\name_3\..\name_4\..
The return value is : 1
The canonicalized path 1 is : A:\name_1\name_2
The un-canonicalized path 6 is : C:\..
The return value is : 1
The canonicalized path 1 is : C:\
Requirements
|
Minimum supported client | Windows 2000 Professional, Windows XP |
|---|---|
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Minimum supported server | Windows 2000 Server |
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Header |
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Library |
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DLL |
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Unicode and ANSI names | PathCanonicalizeW (Unicode) and PathCanonicalizeA (ANSI) |
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Build date: 9/7/2011
#include <windows.h>
#include <iostream>
#include "Shlwapi.h"
using namespace std;
int main()
{
// Path_1 destination buffer.
char buffer_1[MAX_PATH] = "JustABufferToHoldTheCanonicalizedPathForAnExample";
char *lpStr1;
lpStr1 = buffer_1;
// Path_2 to be Canonicalized.
char buffer_2[ ] = "A:\\name_1\\.\\name_2\\..\\name_3";
char *lpStr2;
lpStr2 = buffer_2;
// Path_3 to be Canonicalized.
char buffer_3[ ] = "A:\\name_1\\..\\name_2\\.\\name_3";
char *lpStr3;
lpStr3 = buffer_3;
// Path_4 to be Canonicalized.
char buffer_4[ ] = "A:\\name_1\\name_2\\.\\name_3\\..\\name_4";
char *lpStr4;
lpStr4 = buffer_4;
// Path_5 to be Canonicalized.
char buffer_5[ ] = "A:\\name_1\\.\\name_2\\.\\name_3\\..\\name_4\\..";
char *lpStr5;
lpStr5 = buffer_5;
// Path_6 to be Canonicalized.
char buffer_6[ ] = "C:\\..";
char *lpStr6;
lpStr6 = buffer_6;
cout << "The un-canonicalized path 2 is : " << lpStr2
<< "\nThe return value is : "
<< PathCanonicalize(lpStr1,lpStr2)
<< "\nThe canonicalized path 1 is : " << lpStr1 << endl;
cout << "\nThe un-canonicalized path 3 is : " << lpStr3
<< "\nThe return value is : "
<< PathCanonicalize(lpStr1,lpStr3)
<< "\nThe canonicalized path 1 is : " << lpStr1 << endl;
cout << "\nThe un-canonicalized path 4 is : " << lpStr4
<< "\nThe return value is : "
<< PathCanonicalize(lpStr1,lpStr4)
<< "\nThe canonicalized path 1 is : " << lpStr1 << endl;
cout << "\nThe un-canonicalized path 5 is : " << lpStr5
<< "\nThe return value is : "
<< PathCanonicalize(lpStr1,lpStr5)
<< "\nThe canonicalized path 1 is : " << lpStr1 << endl;
cout << "\nThe un-canonicalized path 6 is : " << lpStr6
<< "\nThe return value is : "
<< PathCanonicalize(lpStr1,lpStr6)
<< "\nThe canonicalized path 1 is : " << lpStr1 << endl;
}
- 2/2/2008
- Solamente