diff options
Diffstat (limited to 'generic/tclNamesp.c')
| -rw-r--r-- | generic/tclNamesp.c | 88 |
1 files changed, 62 insertions, 26 deletions
diff --git a/generic/tclNamesp.c b/generic/tclNamesp.c index d1da5ae..2365a22 100644 --- a/generic/tclNamesp.c +++ b/generic/tclNamesp.c @@ -21,7 +21,7 @@ * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tclNamesp.c,v 1.45 2004/08/25 21:28:26 dkf Exp $ + * RCS: @(#) $Id: tclNamesp.c,v 1.46 2004/08/27 09:07:06 dkf Exp $ */ #include "tclInt.h" @@ -229,6 +229,8 @@ static int NamespaceWhichCmd _ANSI_ARGS_(( static int SetNsNameFromAny _ANSI_ARGS_(( Tcl_Interp *interp, Tcl_Obj *objPtr)); static void UpdateStringOfNsName _ANSI_ARGS_((Tcl_Obj *objPtr)); +static EnsembleConfig * FindEnsemble _ANSI_ARGS_((Tcl_Interp *interp, + Tcl_Obj *cmdNameObj, int flags)); static int NsEnsembleImplementationCmd _ANSI_ARGS_(( ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); @@ -4421,42 +4423,24 @@ NamespaceEnsembleCmd(dummy, interp, objc, objv) return TCL_OK; } - case ENS_EXISTS: { - Command *cmdPtr; - int flag; - + case ENS_EXISTS: if (objc != 4) { Tcl_WrongNumArgs(interp, 3, objv, "cmdname"); return TCL_ERROR; } - cmdPtr = (Command *) - Tcl_FindCommand(interp, TclGetString(objv[3]), 0, 0); - flag = (cmdPtr != NULL && - cmdPtr->objProc == NsEnsembleImplementationCmd); - Tcl_SetBooleanObj(Tcl_GetObjResult(interp), flag); + Tcl_SetBooleanObj(Tcl_GetObjResult(interp), + FindEnsemble(interp, objv[3], 0) != NULL); return TCL_OK; - } - - case ENS_CONFIG: { - char *cmdName; - Command *cmdPtr; + case ENS_CONFIG: if (objc < 4 || (objc != 5 && objc & 1)) { Tcl_WrongNumArgs(interp, 3, objv, "cmdname ?opt? ?value? ..."); return TCL_ERROR; } - cmdName = TclGetString(objv[3]); - cmdPtr = (Command *) - Tcl_FindCommand(interp, cmdName, 0, TCL_LEAVE_ERR_MSG); - if (cmdPtr == NULL) { + ensemblePtr = FindEnsemble(interp, objv[3], TCL_LEAVE_ERR_MSG); + if (ensemblePtr == NULL) { return TCL_ERROR; } - if (cmdPtr->objProc != NsEnsembleImplementationCmd) { - Tcl_AppendResult(interp, cmdName, " is not an ensemble command", - NULL); - return TCL_ERROR; - } - ensemblePtr = (EnsembleConfig *) cmdPtr->objClientData; if (objc == 5) { if (Tcl_GetIndexFromObj(interp, objv[4], configOptions, "option", @@ -4722,7 +4706,6 @@ NamespaceEnsembleCmd(dummy, interp, objc, objv) ensemblePtr->nsPtr->exportLookupEpoch++; return TCL_OK; } - } default: Tcl_Panic("unexpected ensemble command"); @@ -4733,6 +4716,59 @@ NamespaceEnsembleCmd(dummy, interp, objc, objv) /* *---------------------------------------------------------------------- * + * FindEnsemble -- + * + * Given a command name, get the ensemble configuration structure + * for it, allowing for [namespace import]s. [Bug 1017022] + * + * Results: + * A pointer to the config struct, or NULL if the command either + * does not exist or is not an ensemble. + * + * Side effects: + * None + * + *---------------------------------------------------------------------- + */ + +static EnsembleConfig * +FindEnsemble(interp, cmdNameObj, flags) + Tcl_Interp *interp; /* Where to do the lookup, and where + * to write the errors if + * TCL_LEAVE_ERR_MSG is set in the + * flags. */ + Tcl_Obj *cmdNameObj; /* Name of command to look up. */ + int flags; /* Either 0 or TCL_LEAVE_ERR_MSG; other + * flags are probably not useful. */ +{ + Command *cmdPtr; + + cmdPtr = (Command *) + Tcl_FindCommand(interp, TclGetString(cmdNameObj), NULL, flags); + if (cmdPtr == NULL) { + return NULL; + } + if (cmdPtr->objProc != NsEnsembleImplementationCmd) { + /* + * Reuse existing infrastructure for following import link + * chains rather than duplicating it. + */ + cmdPtr = (Command *) TclGetOriginalCommand((Tcl_Command) cmdPtr); + + if (cmdPtr == NULL || cmdPtr->objProc != NsEnsembleImplementationCmd) { + if (flags & TCL_LEAVE_ERR_MSG) { + Tcl_AppendResult(interp, "\"", TclGetString(cmdNameObj), + "\" is not an ensemble command", NULL); + } + return NULL; + } + } + return (EnsembleConfig *) cmdPtr->objClientData; +} + +/* + *---------------------------------------------------------------------- + * * NsEnsembleImplementationCmd -- * * Implements an ensemble of commands (being those exported by a |