Date parsed: 25/10/2007 13:04:18
Date: Thu, 25 Oct 2007 18:04:18 -0500
Thanks!
"Pops" <dude@nospamnospamnospam.com> wrote in message
news:uqajB%23TFIHA.4544@TK2MSFTNGP06.phx.gbl...
> Andrew Chalk wrote:
>> Is their any built-in Win32 function that returns the relative path to a
>> file given the applications current working directory?
>>
>> Many thanks
>
> Andrew, I quickly pulled some "path" related c/c++ functions from my
> pathlib.cpp library, and put this test demo "Relative.cpp" example.
>
> Hope this helps
>
> --
> HLS
>
> // File: V:\local\wc5\common\relative.cpp
> // comple: CL relative.cpp" /W3 /GX /MD /D "_AFXDLL"
>
> #include <stdio.h>
> #include <afx.h>
>
> typedef struct _SPLITFILEPARTS {
> char drive[_MAX_DRIVE]; // WIN32 defines this as 3
> char dir[_MAX_DIR]; // WIN32 defines this as 256
> char fname[_MAX_FNAME]; // WIN32 defines this as 256
> char ext[_MAX_EXT]; // WIN32 defines this as 256
> } SPLITFILEPARTS, *PSLITFILEPATHS;
>
> char *ExtractFilePath(char *dest, const char *s,
> const BOOL noDrive = FALSE);
> char *ExtractFileName(char *dest, const char *s,
> const BOOL noExt = FALSE);
>
> BOOL ExtractFileParts(const char *s, SPLITFILEPARTS &sf)
> {
> ZeroMemory(&sf,sizeof(sf));
> if (s == NULL) return FALSE;
> _splitpath(s, sf.drive, sf.dir, sf.fname,sf.ext);
> return TRUE;
> }
>
> char *ExtractFileName(char *dest, const char *s,
> const BOOL noExt /* = FALSE */)
> {
> SPLITFILEPARTS sf;
> if (!ExtractFileParts(s,sf)) return dest;
> if (noExt) sf.ext[0] = 0;
> _makepath(dest,"","",sf.fname,sf.ext);
> return dest;
> }
>
> CString ExtractFileName(const char *s)
> {
> CString q;
> char *p = q.GetBuffer(MAX_PATH);
> ExtractFileName(p, s);
> q.ReleaseBuffer();
> return q;
> }
>
> char *ExtractFilePath(char *dest, const char *s,
> const BOOL noDrive /* = FALSE */)
> {
> SPLITFILEPARTS sf;
> if (!ExtractFileParts(s,sf)) return dest;
> if (noDrive) sf.drive[0] = 0;
> _makepath(dest,sf.drive,sf.dir,"","");
> return dest;
> }
>
> CString ExtractFilePath(const char *s)
> {
> CString q;
> char *p = q.GetBuffer(MAX_PATH);
> ExtractFilePath(p, s);
> q.ReleaseBuffer();
> return q;
> }
>
> CString ExtractFileDrive(const char *s)
> {
> if (s == NULL) {
> return "";
> }
> CString q;
> char *p = q.GetBuffer(MAX_PATH);
> SPLITFILEPARTS sf;
> ExtractFileParts(s,sf);
> _makepath(p, sf.drive,"","","");
> q.ReleaseBuffer();
> return q;
> }
>
>
> CString ExtractFilePathNoDrive(const char *s)
> {
> CString q;
> char *p = q.GetBuffer(MAX_PATH);
> ExtractFilePath(p,s,TRUE);
> q.ReleaseBuffer();
> return q;
> }
>
> void SplitDirs(char *Path, char *Dirs[], int &DirCount)
> {
>
> int i = 0;
> int j = 0;
> while (Path[i]) {
> if ((Path[i] == '\\') || (Path[i] == '/')) {
> Path[i] = 0;
> Dirs[j] = &Path[i+1];
> j++;
> }
> i++;
> }
> DirCount = j-1;
> }
>
> /*
> * ExtractRelativePath()
> * given BaseName and DestName, return relative path
> * if BaseName empty, then relative path is compared against
> * current directory
> *
> */
>
> CString ExtractRelativePath(const CString &BaseName,
> const CString &DestName)
> {
> char BasePath[MAX_PATH];
> char DestPath[MAX_PATH];
>
> strcpy(BasePath,BaseName);
> if (BaseName.IsEmpty()) {
> GetCurrentDirectory(sizeof(BasePath),BasePath);
> }
>
> if (_stricmp(ExtractFileDrive(BasePath),
> ExtractFileDrive(DestName))) {
> return DestName;
> }
>
> strcpy(BasePath,ExtractFilePathNoDrive(BasePath));
> strcpy(DestPath,ExtractFilePathNoDrive(DestName));
>
> char *BaseDirs[130];
> char *DestDirs[130];
> int BaseDirCount = 0;
> int DestDirCount = 0;
>
> SplitDirs(BasePath, BaseDirs, BaseDirCount);
> SplitDirs(DestPath, DestDirs, DestDirCount);
>
> int i = 0;
> while ((i < BaseDirCount) && (i < DestDirCount)) {
> if (_stricmp(BaseDirs[i], DestDirs[i]) != 0) break;
> i++;
> }
> CString Result = ".\\";
> for (int j = i; j < BaseDirCount; j++)
> Result += "..\\"; // Do not localize
> for (int k = i; k < DestDirCount; k++) {
> Result += CString(DestDirs[k]) + "\\"; // Do not localize
> }
> Result += ExtractFileName(DestName);
> return Result;
> }
>
> //--------------------------------------------
> // MAIN
> //---------------------------------------------
> void main(char argc, char *argv[])
> {
>
> CString base = ""; // assume current directory
> CString dest = "v:\\local\\wc5\\common";
> // expecting ".\\common"
> printf("rel path: %s\n",ExtractRelativePath(base,dest));
>
> }
