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Tcl_PkgRequire(3) Tcl Library Procedures Tcl_PkgRequire(3)
_________________________________________________________________________________________________
NAME
Tcl_PkgRequire, Tcl_PkgRequireEx, Tcl_PkgRequireProc, Tcl_PkgPresent, Tcl_PkgPresentEx,
Tcl_PkgProvide, Tcl_PkgProvideEx - package version control
SYNOPSIS
#include <tcl.h>
const char *
Tcl_PkgRequire(interp, name, version, exact)
const char *
Tcl_PkgRequireEx(interp, name, version, exact, clientDataPtr)
int
Tcl_PkgRequireProc(interp, name, objc, objv, clientDataPtr)
const char *
Tcl_PkgPresent(interp, name, version, exact)
const 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.
const char *name (in) Name of package.
const 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 associated 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 completed suc-
cessfully.
int objc (in) Number of requirements.
Tcl_Obj* objv[] (in) Array of requirements.
_________________________________________________________________
DESCRIPTION
These procedures provide C-level interfaces to Tcl's package and version management facil-
ities.
Tcl_PkgRequire is equivalent to the package require command, Tcl_PkgPresent 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 the interpreter's result.
Tcl_PkgProvide returns TCL_OK if it completes successfully; if an error occurs it returns
TCL_ERROR and leaves an error message in the interpreter's result.
Tcl_PkgProvideEx, Tcl_PkgPresentEx and Tcl_PkgRequireEx allow the setting and retrieving
of the client data associated with the package. In all other respects they are equivalent
to the matching functions.
Tcl_PkgRequireProc is the form of package require handling multiple requirements. The
other forms are present for backward compatibility and translate their invocations to this
form.
KEYWORDS
package, present, provide, require, version
Tcl 7.5 Tcl_PkgRequire(3)
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Under GNU General Public License
2024-04-19 12:12 @3.145.78.95 CrawledBy Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)