CAFilePathUtils.cpp

/*  Copyright © 2007 Apple Inc. All Rights Reserved.
    
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*/
#include "CAFilePathUtils.h"
#include <string.h>

#if !CA_NO_CORE_SERVICES
#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
    #include <CoreServices/CoreServices.h> // FSRef
#else
    #include <CoreServices.h>
#endif

OSStatus    PosixPathToParentFSRefAndName(const char *path, FSRef &outParentDir, CFStringRef &outFileName)
{
    // convert C string to CFString
#if !TARGET_OS_WIN32
    CFStringRef cfFullPath = CFStringCreateWithCString(NULL, path, kCFStringEncodingUTF8);
#else
    CFStringRef cfFullPath = CFStringCreateWithCString(NULL, path, kCFStringEncodingWindowsLatin1);
#endif
    // convert CF string to URL
    CFURLRef fullurl = CFURLCreateWithFileSystemPath(NULL, cfFullPath, TARGET_OS_WIN32 ? kCFURLWindowsPathStyle : kCFURLPOSIXPathStyle, false);
    CFRelease(cfFullPath);
    // get the directory portion of the URL
    CFURLRef dirurl = CFURLCreateCopyDeletingLastPathComponent(NULL, fullurl);
    // get the directory's FSSpec
    OSStatus err = CFURLGetFSRef(dirurl, &outParentDir) ? OSStatus(noErr) : OSStatus(fnfErr);
    CFRelease(dirurl);
    
    CFStringRef lastPathComponent = CFURLCopyLastPathComponent(fullurl);
    CFRelease(fullurl);
    CFMutableStringRef filename = CFStringCreateMutableCopy(NULL, 0, lastPathComponent);
    CFRelease(lastPathComponent);
    // convert colons (legal in POSIX paths, illegal in File Manager) to slashes
    CFStringFindAndReplace(filename, CFSTR(":"), CFSTR("/"), CFRangeMake(0, CFStringGetLength(filename)), 0);
    
    outFileName = filename;
    
    return err;
}
#endif // !CA_NO_CORE_SERVICES


#if TARGET_OS_WIN32

char*   dirname(const char* inPath)
{
    static char sAnswer[1024];
    
    char* theAnswer = NULL;
    SInt32 thePathLength = strlen(inPath);
    if(thePathLength < 1023)
    {
        //  make a working copy
        strcpy(sAnswer, inPath);
        
        //  start at the end of the string
        SInt32 theIndex = thePathLength - 1;
        
        //  walk back over the '\' characters
        while((theIndex > 0) && (sAnswer[theIndex] == '\\'))
        {
            --theIndex;
        }
        
        //  now keep walking back until we get to a '\'
        while((theIndex > 0) && (sAnswer[theIndex] != '\\'))
        {
            --theIndex;
        }
        
        //  where we are now is either the first character of the path or the '\' that marks the end of the directory name
        if(theIndex > 0)
        {
            //  we have a name so put a '\0' in place of the '\'
            sAnswer[theIndex] = 0;
        }
        else
        {
            //  no name, so the answer is "."
            sAnswer[0] = '.';
            sAnswer[1] = 0;
        }
        
        //  set the return value
        theAnswer = sAnswer;
    }
    
    return theAnswer;
}

char*   basename(const char* inPath)
{
    static char sAnswer[1024];
    
    char* theAnswer = NULL;
    SInt32 thePathLength = strlen(inPath);
    if(thePathLength < 1023)
    {
        //  make a working copy
        strcpy(sAnswer, inPath);
        
        //  start at the end of the string
        SInt32 theLastIndex = thePathLength - 1;
        
        //  walk back over the '\' characters
        while((theLastIndex > 0) && (sAnswer[theLastIndex] == '\\'))
        {
            --theLastIndex;
        }
        
        //  check to see if we're at the beginning now
        if(theLastIndex > 0)
        {
            //  there's a name in there now, so start where we are and go back to the next '\'
            UInt32 theFirstIndex = theLastIndex;
            while((theFirstIndex > 0) && (sAnswer[theFirstIndex] != '\\'))
            {
                --theFirstIndex;
            }
            
            //  we now have a string, so put a '\0' after the last character
            sAnswer[theLastIndex + 1] = 0;
            
            //  and set the return value
            theAnswer = &sAnswer[theFirstIndex];
        }
        else
        {
            //  the path was entirely '\' characters, so the return value is "\"
            sAnswer[0] = '\\';
            sAnswer[1] = 0;
        
            //  set the return value
            theAnswer = sAnswer;
        }
    }
    
    return theAnswer;
}

#endif