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NAME
     Tcl_SplitPath, Tcl_JoinPath,  Tcl_GetPathType  -  manipulate
     platform-dependent file paths

SYNOPSIS
     #include <tcl.h>

     Tcl_SplitPath(path, argcPtr, argvPtr)

     char *
     Tcl_JoinPath(argc, argv, resultPtr)

     Tcl_PathType
     Tcl_GetPathType(path)

ARGUMENTS
     char          *path        (in)      File  path  in  a  form
                                          appropriate   for   the
                                          current  platform  (see
                                          the   filename   manual
                                          entry  for   acceptable
                                          forms for path names).

     int           *argcPtr     (out)     Filled in  with  number
                                          of   path  elements  in
                                          path.

     char          ***argvPtr   (out)     *argvPtr will be filled
                                          in  with the address of
                                          an array of pointers to
                                          the  strings  that  are
                                          the extracted  elements
                                          of path.  There will be
                                          *argcPtr valid  entries
                                          in  the array, followed
                                          by a NULL entry.

     int           argc         (in)      Number of  elements  in
                                          argv.

     char          **argv       (in)      Array of path  elements
                                          to  merge together into
                                          a single path.

     Tcl_DString   *resultPtr   (in/out)  A pointer  to  an  ini-
                                          tialized Tcl_DString to
                                          which  the  result   of
                                          Tcl_JoinPath   will  be
                                          appended.
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DESCRIPTION
     These procedures may be used to disassemble  and  reassemble
     file  paths  in  a platform independent manner: they provide
     C-level access to the same functionality as the file  split,
     file join, and file pathtype commands.

     Tcl_SplitPath breaks a path into its  constituent  elements,
     returning an array of pointers to the elements using argcPtr
     and argvPtr.  The area of memory pointed to by  *argvPtr  is
     dynamically allocated; in addition to the array of pointers,
     it also holds copies of all the path elements.   It  is  the
     caller's  responsibility  to  free all of this storage.  For
     example, suppose that you have called Tcl_SplitPath with the
     following code:
          int argc;
          char *path;
          char **argv;
          ...
          Tcl_SplitPath(string, &argc, &argv);
     Then you should eventually free the storage with a call like
     the following:
          Tcl_Free((char *) argv);

     Tcl_JoinPath is the inverse of  Tcl_SplitPath:  it  takes  a
     collection  of path elements given by argc and argv and gen-
     erates a result string that is a properly constructed  path.
     The  result string is appended to resultPtr.  ResultPtr must
     refer to an initialized Tcl_DString.

     If the result of Tcl_SplitPath is  passed  to  Tcl_JoinPath,
     the  result  will refer to the same location, but may not be
     in  the  same  form.   This  is  because  Tcl_SplitPath  and
     Tcl_JoinPath  eliminate duplicate path separators and return
     a normalized form for each platform.

     Tcl_GetPathType returns the  type  of  the  specified  path,
     where    Tcl_PathType    is    one   of   TCL_PATH_ABSOLUTE,
     TCL_PATH_RELATIVE,  or  TCL_PATH_VOLUME_RELATIVE.   See  the
     filename  manual  entry  for a description of the path types
     for each platform.


KEYWORDS
     file, filename, join, path, split, type

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