Tcl_PkgProvideEx man page on UnixWare

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Tcl_PkgRequire(3)	    Tcl Library Procedures	     Tcl_PkgRequire(3)

______________________________________________________________________________

NAME
       Tcl_PkgRequire,	 Tcl_PkgRequireEx,  Tcl_PkgPresent,  Tcl_PkgPresentEx,
       Tcl_PkgProvide, Tcl_PkgProvideEx - package version control

SYNOPSIS
       #include <tcl.h>

       char *
       Tcl_PkgRequire(interp, name, version, exact)

       char *
       Tcl_PkgRequireEx(interp, name, version, exact, clientDataPtr)

       char *
       Tcl_PkgPresent(interp, name, version, exact)

       char *
       Tcl_PkgPresentEx(interp, name, version, exact, clientDataPtr)

       int
       Tcl_PkgProvide(interp, name, version)

       int
       Tcl_PkgProvideEx(interp, name, version, clientData)

ARGUMENTS
       Tcl_Interp     *interp	      (in)	Interpreter where  package  is
						needed or available.

       char	      *name	      (in)	Name of package.

       char	      *version	      (in)	A version string consisting of
						one or	more  decimal  numbers
						separated by dots.

       int	      exact	      (in)	Non-zero  means	 that only the
						particular  version  specified
						by   version   is  acceptable.
						Zero means that newer versions
						than  version are also accept‐
						able as long as they have  the
						same  major  version number as
						version.

       ClientData     clientData      (in)	Arbitrary value to be  associ‐
						ated with the package.

       ClientData     *clientDataPtr  (out)	Pointer	 to place to store the
						value  associated   with   the
						matching  package.  It is only
						changed if the pointer is  not
						NULL  and  the	function  com‐
						pleted successfully.
_________________________________________________________________

DESCRIPTION
       These procedures provide C-level interfaces to Tcl's package  and  ver‐
       sion management facilities.

       Tcl_PkgRequire  is equivalent to the package require command, Tcl_PkgP‐
       resent is equivalent to the package present command, and Tcl_PkgProvide
       is equivalent to the package provide command.

       See  the	 documentation	for the Tcl commands for details on what these
       procedures do.

       If Tcl_PkgPresent or Tcl_PkgRequire complete successfully they return a
       pointer	to  the	 version string for the version of the package that is
       provided in the interpreter (which may be different than	 version);  if
       an  error  occurs  they	return	NULL  and  leave  an  error message in
       interp->result.

       Tcl_PkgProvide returns TCL_OK if it completes successfully; if an error
       occurs	it   returns   TCL_ERROR   and	leaves	an  error  message  in
       interp->result.

       Tcl_PkgProvideEx, Tcl_PkgPresentEx and Tcl_PkgRequireEx allow the  set‐
       ting  and retrieving of the client data associated with the package. In
       all other respects they are equivalent to the matching functions.

KEYWORDS
       package, present, provide, require, version

Tcl				      7.5		     Tcl_PkgRequire(3)
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