Difference between revisions of "File Existance in Windows"

From PeformIQ Upgrade
Jump to navigation Jump to search
 
(6 intermediate revisions by the same user not shown)
Line 68: Line 68:
</pre>
</pre>


=Make Sure it Exists=
=Create a Path to Make Sure it Exists=


<pre>
<pre>
BOOL MakeSurePathExists( CString &Path,
BOOL MakeSurePathExists( CString &Path, bool FilenameIncluded=true)
                        bool FilenameIncluded=true)
{
{
   int Pos=0;
   int Pos=0;
   while((Pos=Path.Find('\\',Pos+1))!=-1)
 
   while ((Pos=Path.Find('\\',Pos+1))!=-1)
       CreateDirectory(Path.Left(Pos),NULL);
       CreateDirectory(Path.Left(Pos),NULL);
   if(!FilenameIncluded)
   if(!FilenameIncluded)
       CreateDirectory(Path,NULL);
       CreateDirectory(Path,NULL);
   return ((!FilenameIncluded)?!_access(Path,0):
 
        !_access(Path.Left(Path.ReverseFind('\\')),0));
   return ((!FilenameIncluded)?!_access(Path,0): !_access(Path.Left(Path.ReverseFind('\\')),0));
}
}
</pre>


int make_sure_path_exists( const char *iPath,
<pre>
                          bool FilenameIncluded=true)
int make_sure_path_exists(const char *iPath, bool FilenameIncluded=true)
{
{
   char *Path=(char*)iPath,
   char *Path         =(char*)iPath;
        *TmpPath=Path,
  char *TmpPath     = Path;
        TmpSmb=0,
  char TmpSmb       = 0;
        *LastDPtr=NULL;
  char *LastDPtr     = NULL;
   while((TmpPath=strpbrk(TmpPath+1,"\\/")))
 
   while((TmpPath = strpbrk(TmpPath + 1, "\\/")))
   {
   {
       TmpSmb=Path[TmpPath-Path];
       TmpSmb                 = Path[TmpPath - Path];
       Path[TmpPath-Path]=0;
       Path[TmpPath - Path]   = 0;
       CreateDirectory(Path,NULL);
       CreateDirectory(Path, NULL);
       Path[TmpPath-Path]=TmpSmb;
       Path[TmpPath-Path]     = TmpSmb;
       LastDPtr=TmpPath;
       LastDPtr               = TmpPath;
   }
   }


   int Res=1;
   int Res = 1;
 
   if(!FilenameIncluded)
   if(!FilenameIncluded)
   {
   {
       CreateDirectory(iPath,NULL);
       CreateDirectory(iPath, NULL);
       Res=!_access(iPath,0);
       Res = !_access(iPath, 0);
   }
   }
   else
   else
Line 109: Line 113:
       if(LastDPtr)
       if(LastDPtr)
       {
       {
         Path=(char*)iPath;
         Path                 = (char*)iPath;
         TmpSmb=Path[LastDPtr-Path];
         TmpSmb               = Path[LastDPtr - Path];
         Path[LastDPtr-Path]=0;
         Path[LastDPtr - Path] = 0;
         Res=!_access(Path,0);
         Res                   = !_access(Path, 0);
         Path[LastDPtr-Path]=TmpSmb;
         Path[LastDPtr - Path] = TmpSmb;
       }
       }
   }
   }
Line 121: Line 125:
</pre>
</pre>


=Search for File=
<pre>
//  crt_searchenv.c
//
//  This program searches for a file in a directory specified by an environment variable.
//
#include <stdlib.h>
#include <stdio.h>
int main(void)
{
  char pathbuffer[_MAX_PATH];
  char searchfile[] = "CL.EXE";
  char envvar[] = "PATH";
  /* Search for file in PATH environment variable: */
  _searchenv( searchfile, envvar, pathbuffer);
  if (*pathbuffer != '\0')
      printf("Path for %s:\n%s\n", searchfile, pathbuffer);
  else
      printf("%s not found\n", searchfile);
}
</pre>
[[Category:Windows Development]]
[[Category:Visual Studio]]
[[Category:Visual Studio]]
[[Category:Dot.NET]]
[[Category:C++]]
[[Category:C++]]
[[Category:Examples]]
[[Category:CSharp]]

Latest revision as of 09:41, 20 October 2014

Example

See - http://msdn.microsoft.com/en-us/library/system.io.directory.exists.aspx

// For File::Exists, Directory::Exists
using namespace System;
using namespace System::IO;
using namespace System::Collections;

// Insert logic for processing found files here.
void ProcessFile( String^ path )
{
   Console::WriteLine( "Processed file '{0}'.", path );
}


// Process all files in the directory passed in, recurse on any directories 
// that are found, and process the files they contain.
void ProcessDirectory( String^ targetDirectory )
{

   // Process the list of files found in the directory.
   array<String^>^fileEntries = Directory::GetFiles( targetDirectory );
   IEnumerator^ files = fileEntries->GetEnumerator();
   while ( files->MoveNext() )
   {
      String^ fileName = safe_cast<String^>(files->Current);
      ProcessFile( fileName );
   }


   // Recurse into subdirectories of this directory.
   array<String^>^subdirectoryEntries = Directory::GetDirectories( targetDirectory );
   IEnumerator^ dirs = subdirectoryEntries->GetEnumerator();
   while ( dirs->MoveNext() )
   {
      String^ subdirectory = safe_cast<String^>(dirs->Current);
      ProcessDirectory( subdirectory );
   }
}

int main( int argc, char *argv[] )
{
   for ( int i = 1; i < argc; i++ )
   {
      String^ path = gcnew String(argv[ i ]);
      if ( File::Exists( path ) )
      {

         // This path is a file
         ProcessFile( path );
      }
      else
      if ( Directory::Exists( path ) )
      {

         // This path is a directory
         ProcessDirectory( path );
      }
      else
      {
         Console::WriteLine( "{0} is not a valid file or directory.", path );
      }

   }
}

Create a Path to Make Sure it Exists

BOOL MakeSurePathExists( CString &Path, bool FilenameIncluded=true)
{
   int Pos=0;

   while ((Pos=Path.Find('\\',Pos+1))!=-1)
      CreateDirectory(Path.Left(Pos),NULL);

   if(!FilenameIncluded)
      CreateDirectory(Path,NULL);

   return ((!FilenameIncluded)?!_access(Path,0): !_access(Path.Left(Path.ReverseFind('\\')),0));
}
int make_sure_path_exists(const char *iPath, bool FilenameIncluded=true)
{
   char *Path         =(char*)iPath;
   char *TmpPath      = Path;
   char TmpSmb        = 0;
   char *LastDPtr     = NULL;

   while((TmpPath = strpbrk(TmpPath + 1, "\\/")))
   {
      TmpSmb                 = Path[TmpPath - Path];
      Path[TmpPath - Path]    = 0;
      CreateDirectory(Path, NULL);
      Path[TmpPath-Path]     = TmpSmb;
      LastDPtr               = TmpPath;
   }

   int Res = 1;

   if(!FilenameIncluded)
   {
      CreateDirectory(iPath, NULL);
      Res = !_access(iPath, 0);
   }
   else
   {
      if(LastDPtr)
      {
         Path                  = (char*)iPath;
         TmpSmb                = Path[LastDPtr - Path];
         Path[LastDPtr - Path] = 0;
         Res                   = !_access(Path, 0);
         Path[LastDPtr - Path] = TmpSmb;
      }
   }

   return Res;
}

Search for File

//  crt_searchenv.c
//
//  This program searches for a file in a directory specified by an environment variable.
//

#include <stdlib.h>
#include <stdio.h>

int main(void)
{
   char pathbuffer[_MAX_PATH];
   char searchfile[] = "CL.EXE";
   char envvar[] = "PATH";

   /* Search for file in PATH environment variable: */

   _searchenv( searchfile, envvar, pathbuffer);
   if (*pathbuffer != '\0')
      printf("Path for %s:\n%s\n", searchfile, pathbuffer);
   else
      printf("%s not found\n", searchfile);
}