Graham Wakefield

I can't figure out how to get the default path from path_getdefault 

(), and then convert that to a fully qualified OS-friendly char * 

I can't figure out how to get the default path from path_getdefault 
(), and then convert that to a fully qualified OS-friendly char *  
path.  Anybody know how?

get-path-as-char-from-path_getdefault

if (!(err = path_topotentialname(path, "", cpath, false)))

    post("error in path_topotentialname %d", err);

Am 27.11.2006 um 00:32 schrieb Graham Wakefield:

> I can't figure out how to get the default path from path_getdefault 

> (), and then convert that to a fully qualified OS-friendly char * 

char cpath[1024];
short path = path_getdefault();
short err;

if (!(err = path_topotentialname(path, "", cpath, false)))
	post("the path is %s", cpath);
else
	post("error in path_topotentialname %d", err);

> Hi,
>
> I can't figure out how to get the default path from path_getdefault 
> (), and then convert that to a fully qualified OS-friendly char *  
> path.  Anybody know how?
>
> Thanks


I didn't think of passing "" as the filename to path_topotentialname.

On Nov 27, 2006, at 2:54 AM, Jeremy Bernstein wrote:

> if (!(err = path_topotentialname(path, "", cpath, false)))

>     post("error in path_topotentialname %d", err);

> char cpath[1024];
> short path = path_getdefault();
> short err;
>
> if (!(err = path_topotentialname(path, "", cpath, false)))
> 	post("the path is %s", cpath);
> else
> 	post("error in path_topotentialname %d", err);


Ah; it turns out that this returns a path with the volume label also 

(e.g. "Macintosh HD:/Users/Documents/MaxMSPobjects/test/") whereas 

what I need is without the volume label (e.g. "/Users/Documents/ 

Ah; it turns out that this returns a path with the volume label also  
(e.g. "Macintosh HD:/Users/Documents/MaxMSPobjects/test/") whereas  
what I need is without the volume label (e.g. "/Users/Documents/ 
MaxMSPobjects/test/").

You can strcmp ";/" and get the location where the volume label ends.

> Ah; it turns out that this returns a path with the volume label also (e.g.

> "Macintosh HD:/Users/Documents/MaxMSPobjects/test/")

> whereas what I need is without the volume label (e.g.

> "/Users/Documents/MaxMSPobjects/test/").

> On Nov 27, 2006, at 2:54 AM, Jeremy Bernstein wrote:

> post("error in path_topotentialname %d", err);

On 11/27/06, Graham Wakefield  wrote:
>
> Ah; it turns out that this returns a path with the volume label also (e.g.
> "Macintosh HD:/Users/Documents/MaxMSPobjects/test/")
> whereas what I need is without the volume label (e.g.
> "/Users/Documents/MaxMSPobjects/test/").
>
> Hmm
>
> On Nov 27, 2006, at 2:54 AM, Jeremy Bernstein wrote:
>
>
> char cpath[1024];
>
> short path = path_getdefault();
>
> short err;
>
>
>
>
> if (!(err = path_topotentialname(path, "", cpath, false)))
>
>  post("the path is %s", cpath);
>
> else
>
>  post("error in path_topotentialname %d", err);
>
>
>
>


In addition to Wesley's solution, you can use the path_nameconform() 

API function. I think this is correct usage for your expected result:

path_nameconform(srcpath, dstpath, PATH_STYLE_SLASH, PATH_TYPE_BOOT);

Am 27.11.2006 um 20:22 schrieb Graham Wakefield:

> Ah; it turns out that this returns a path with the volume label 

> also (e.g. "Macintosh HD:/Users/Documents/MaxMSPobjects/test/") 

> whereas what I need is without the volume label (e.g. "/Users/ 

In addition to Wesley's solution, you can use the path_nameconform()  
API function. I think this is correct usage for your expected result:

path_nameconform(srcpath, dstpath, PATH_STYLE_SLASH, PATH_TYPE_BOOT);
post("dstpath: %s", dstpath);

> Ah; it turns out that this returns a path with the volume label  
> also (e.g. "Macintosh HD:/Users/Documents/MaxMSPobjects/test/")  
> whereas what I need is without the volume label (e.g. "/Users/ 
> Documents/MaxMSPobjects/test/").


    char srcpath[1024], dstpath[1024];

    if (!path_topotentialname(path_getdefault(), "", srcpath, false))

        path_nameconform(srcpath, dstpath, PATH_STYLE_SLASH, PATH_TYPE_BOOT);

On Nov 28, 2006, at 1:27 AM, Jeremy Bernstein wrote:

> path_nameconform(srcpath, dstpath, PATH_STYLE_SLASH, PATH_TYPE_BOOT);

	char srcpath[1024], dstpath[1024];
	if (!path_topotentialname(path_getdefault(), "", srcpath, false))
	{
		path_nameconform(srcpath, dstpath, PATH_STYLE_SLASH, PATH_TYPE_BOOT);
	} else {
		strcpy(dstpath,"/");
	}

> char srcpath[1024], dstpath[1024];
>
> ...
>
> path_nameconform(srcpath, dstpath, PATH_STYLE_SLASH, PATH_TYPE_BOOT);
> post("dstpath: %s", dstpath);


Am 28.11.2006 um 20:23 schrieb Graham Wakefield:

>     char srcpath[1024], dstpath[1024];

>     if (!path_topotentialname(path_getdefault(), "", srcpath, false))

>         path_nameconform(srcpath, dstpath, PATH_STYLE_SLASH, 

Is there a trick to get a filename that POSIX open() calls like even 

when the file is on another harddisk? I'm currently using open_dialog 

() to let the user choose a file, but then need to open the file with 

POSIX open() call in order to get a file handle that I can pass on to 

mmap(). The conversion is like the one above, but only works as long 

as the files are on the system partition...

> Brilliant.
>
> The full code (for the archives):
>
> 	char srcpath[1024], dstpath[1024];
> 	if (!path_topotentialname(path_getdefault(), "", srcpath, false))
> 	{
> 		path_nameconform(srcpath, dstpath, PATH_STYLE_SLASH,  
> PATH_TYPE_BOOT);
> 	} else {
> 		strcpy(dstpath,"/");
> 	}

Is there a trick to get a filename that POSIX open() calls like even  
when the file is on another harddisk? I'm currently using open_dialog 
() to let the user choose a file, but then need to open the file with  
POSIX open() call in order to get a file handle that I can pass on to  
mmap(). The conversion is like the one above, but only works as long  
as the files are on the system partition...

What does the path you're getting back look like? Does it have 

colons in it, per an old-style HFS path. You may need to either use 

CFURL or convert the colon-delimited path to a POSIX path manually (/ 

On Nov 28, 2006, at 11:48 AM, Olaf Matthes wrote:

> Am 28.11.2006 um 20:23 schrieb Graham Wakefield:

>>     char srcpath[1024], dstpath[1024];

>>     if (!path_topotentialname(path_getdefault(), "", srcpath, false))

>>         path_nameconform(srcpath, dstpath, PATH_STYLE_SLASH, 

> Is there a trick to get a filename that POSIX open() calls like 

> even when the file is on another harddisk? I'm currently using 

> open_dialog() to let the user choose a file, but then need to open 

> the file with POSIX open() call in order to get a file handle that 

> I can pass on to mmap(). The conversion is like the one above, but 

> only works as long as the files are on the system partition...

What does the path you're getting back look like?  Does it have  
colons in it, per an old-style HFS path.  You may need to either use  
CFURL or convert the colon-delimited path to a POSIX path manually (/ 
Volumes//path_to_file).

>
> Am 28.11.2006 um 20:23 schrieb Graham Wakefield:
>
>> Brilliant.
>>
>> The full code (for the archives):
>>
>> 	char srcpath[1024], dstpath[1024];
>> 	if (!path_topotentialname(path_getdefault(), "", srcpath, false))
>> 	{
>> 		path_nameconform(srcpath, dstpath, PATH_STYLE_SLASH,  
>> PATH_TYPE_BOOT);
>> 	} else {
>> 		strcpy(dstpath,"/");
>> 	}
>
> Is there a trick to get a filename that POSIX open() calls like  
> even when the file is on another harddisk? I'm currently using  
> open_dialog() to let the user choose a file, but then need to open  
> the file with POSIX open() call in order to get a file handle that  
> I can pass on to mmap(). The conversion is like the one above, but  
> only works as long as the files are on the system partition...
>
> Olaf
>


Am 28.11.2006 um 21:54 schrieb Mark Pauley:

> What does the path you're getting back look like? Does it have 

> colons in it, per an old-style HFS path. You may need to either 

> use CFURL or convert the colon-delimited path to a POSIX path 

open_dialog(x->x_filename, &x->x_filevol, &type, 0L, 0);

// path_topathname(x->x_filevol, x->x_filename, file);

path_topotentialname(x->x_filevol, x->x_filename, file, false);

path_nameconform(file, x->x_filename, PATH_STYLE_MAX_PLAT, 

With files being an a different harddisk I end up with x->x_filenam 

being empty. When on the same disk, it contains the full path 

including filename that open() wants to see. This is on OS X (because 

on Windows there is no mmap(), so I have to use sysfile API there).

> What does the path you're getting back look like?  Does it have  
> colons in it, per an old-style HFS path.  You may need to either  
> use CFURL or convert the colon-delimited path to a POSIX path  
> manually (/Volumes//path_to_file).

open_dialog(x->x_filename, &x->x_filevol, &type, 0L, 0);
// path_topathname(x->x_filevol, x->x_filename, file);
path_topotentialname(x->x_filevol, x->x_filename, file, false);
path_nameconform(file, x->x_filename, PATH_STYLE_MAX_PLAT,  
PATH_TYPE_BOOT);
fh = open(x->x_filename, O_RDONLY);

With files being an a different harddisk I end up with x->x_filenam  
being empty. When on the same disk, it contains the full path  
including filename that open() wants to see. This is on OS X (because  
on Windows there is no mmap(), so I have to use sysfile API there).

In this case, there is no routine provided by max, but is it a simple 

string manipulation. If there is an error reported in the string 

conversion, strstr for ":/" . The partition name will be first and 

then you can just put into a string like Mark suggests.

/Volumes/partitionname/folder/subfolder/file.txt

Something like the following quickie email client code, as applied to 

a failed BOOT_STYLE pathname. Note, as always with email client 

coding, there could be typos, oversights, etc. but it should get you 

void max_to_osx_pathname(char *maxpathname, char *osxpathname)

    if (pathstr=sscanf(maxpathname,":/")

        // copy partition name form max pathname up to ":/"

            partitionstr[i] = maxpthname[i];

        // advance path past ":/"

        // write into osxpathname with appropriate format string

        sprintf(osxpathname,"/Volumes/%s/%s",,pathstr)    

        strcpy(osxpathname,maxpathname);

Note that this /Volumes/ syntax is OS X only. As for windows usage of 

open(), you'll have to consult what version of open you're using (MS, 

Cygwin, or other), and what it supports. I don't know off the top of 

>
> Is there a trick to get a filename that POSIX open() calls like  
> even when the file is on another harddisk? I'm currently using  
> open_dialog() to let the user choose a file, but then need to open  
> the file with POSIX open() call in order to get a file handle that  
> I can pass on to mmap(). The conversion is like the one above, but  
> only works as long as the files are on the system partition...

In this case, there is no routine provided by max, but is it a simple  
string manipulation. If there is an error reported in the string  
conversion, strstr for ":/" . The partition name will be first and  
then you can just put into a string like Mark suggests.

Something like the following quickie email client code, as applied to  
a failed BOOT_STYLE pathname. Note, as always with email client  
coding, there could be typos, oversights, etc. but it should get you  
going.

void max_to_osx_pathname(char *maxpathname, char *osxpathname)
{
	char *pathstr;
	char partitionstr[256];
	long i;

	if (pathstr=sscanf(maxpathname,":/")
	{
		// copy partition name form max pathname up to ":/"
		for (i=0;i
			partitionstr[i] = maxpthname[i];

		// null terminate
		partitionstr[i] = 0;

		// advance path past ":/"
		pathstr+=2;

		// write into osxpathname with appropriate format string
		sprintf(osxpathname,"/Volumes/%s/%s",,pathstr)	
	}
	else
	{
		strcpy(osxpathname,maxpathname);
	}

Note that this /Volumes/ syntax is OS X only. As for windows usage of  
open(), you'll have to consult what version of open you're using (MS,  
Cygwin, or other), and what it supports. I don't know off the top of  
my head.

On Nov 28, 2006, at 12:54 PM, Mark Pauley wrote:

It's a Max cross platform path specifier, which is something like a 

cross between unix and windows style paths.

It's a Max cross platform path specifier, which is something like a  
cross between unix and windows style paths.

Am 28.11.2006 um 23:01 schrieb Joshua Kit Clayton:

> On Nov 28, 2006, at 11:48 AM, Olaf Matthes wrote:

>> Is there a trick to get a filename that POSIX open() calls like 

>> even when the file is on another harddisk? I'm currently using 

>> open_dialog() to let the user choose a file, but then need to open 

>> the file with POSIX open() call in order to get a file handle that 

>> I can pass on to mmap(). The conversion is like the one above, but 

>> only works as long as the files are on the system partition...

> In this case, there is no routine provided by max, but is it a 

> simple string manipulation. If there is an error reported in the 

> string conversion, strstr for ":/" . The partition name will be 

> first and then you can just put into a string like Mark suggests.

> partitionname:/folder/subfolder/file.txt

> /Volumes/partitionname/folder/subfolder/file.txt

> Something like the following quickie email client code, as applied 

> to a failed BOOT_STYLE pathname. Note, as always with email client 

> coding, there could be typos, oversights, etc. but it should get 

Thanks Joshua! This doesn't work, but gives me an idea what to do. 

Actually, my mistake was to put my path through path_nameconform() 

after which I ended up with an empty filename...

>
> On Nov 28, 2006, at 11:48 AM, Olaf Matthes wrote:
>
>>
>> Is there a trick to get a filename that POSIX open() calls like  
>> even when the file is on another harddisk? I'm currently using  
>> open_dialog() to let the user choose a file, but then need to open  
>> the file with POSIX open() call in order to get a file handle that  
>> I can pass on to mmap(). The conversion is like the one above, but  
>> only works as long as the files are on the system partition...
>
> In this case, there is no routine provided by max, but is it a  
> simple string manipulation. If there is an error reported in the  
> string conversion, strstr for ":/" . The partition name will be  
> first and then you can just put into a string like Mark suggests.
>
> e.g.
>
> partitionname:/folder/subfolder/file.txt
>
> maps to
>
> /Volumes/partitionname/folder/subfolder/file.txt
>
> Something like the following quickie email client code, as applied  
> to a failed BOOT_STYLE pathname. Note, as always with email client  
> coding, there could be typos, oversights, etc. but it should get  
> you going.

Thanks Joshua! This doesn't work, but gives me an idea what to do.  
Actually, my mistake was to put my path through path_nameconform()  
after which I ended up with an empty filename...

On Nov 28, 2006, at 3:02 PM, Olaf Matthes wrote:

> As Joshua! This doesn't work, but gives me an idea what to do. 

> Actually, my mistake was to put my path through path_nameconform() 

> after which I ended up with an empty filename...

Right, check the return value (if non zero something went wrong, most 

likely it's not on the boot volume), and then just use the original 

in some fashion similar to my rough C sketch.

>
> As Joshua! This doesn't work, but gives me an idea what to do.  
> Actually, my mistake was to put my path through path_nameconform()  
> after which I ended up with an empty filename...

Right, check the return value (if non zero something went wrong, most  
likely it's not on the boot volume), and then just use the original  
in some fashion similar to my rough C sketch.

get path as char * from path_getdefault()?