diff options
Diffstat (limited to 'generic')
| -rw-r--r-- | generic/tclBasic.c | 1 | ||||
| -rw-r--r-- | generic/tclCmdIL.c | 117 | ||||
| -rw-r--r-- | generic/tclInt.h | 3 |
3 files changed, 121 insertions, 0 deletions
diff --git a/generic/tclBasic.c b/generic/tclBasic.c index a0c5a91..f7e0929 100644 --- a/generic/tclBasic.c +++ b/generic/tclBasic.c @@ -324,6 +324,7 @@ static const CmdInfo builtInCmds[] = { {"lsearch", Tcl_LsearchObjCmd, NULL, NULL, CMD_IS_SAFE}, {"lset", Tcl_LsetObjCmd, TclCompileLsetCmd, NULL, CMD_IS_SAFE}, {"lsort", Tcl_LsortObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"lsubst", Tcl_LsubstObjCmd, NULL, NULL, CMD_IS_SAFE}, {"package", Tcl_PackageObjCmd, NULL, TclNRPackageObjCmd, CMD_IS_SAFE}, {"proc", Tcl_ProcObjCmd, NULL, NULL, CMD_IS_SAFE}, {"regexp", Tcl_RegexpObjCmd, TclCompileRegexpCmd, NULL, CMD_IS_SAFE}, diff --git a/generic/tclCmdIL.c b/generic/tclCmdIL.c index cdc302c..7776c78 100644 --- a/generic/tclCmdIL.c +++ b/generic/tclCmdIL.c @@ -4486,6 +4486,123 @@ Tcl_LsortObjCmd( /* *---------------------------------------------------------------------- * + * Tcl_LsubstObjCmd -- + * + * This procedure is invoked to process the "lsubst" Tcl command. See the + * user documentation for details on what it does. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *---------------------------------------------------------------------- + */ + +int +Tcl_LsubstObjCmd( + TCL_UNUSED(ClientData), + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument values. */ +{ + Tcl_Obj *listPtr; /* Pointer to the list being altered. */ + Tcl_Obj *finalValuePtr; /* Value finally assigned to the variable. */ + int createdNewObj; + int result; + int first; + int last; + int listLen; + int numToDelete; + + if (objc < 4) { + Tcl_WrongNumArgs(interp, 1, objv, + "listVar first last ?element ...?"); + return TCL_ERROR; + } + + listPtr = Tcl_ObjGetVar2(interp, objv[1], NULL, TCL_LEAVE_ERR_MSG); + if (listPtr == NULL) { + return TCL_ERROR; + } + + /* + * TODO - refactor the index extraction into a common function shared + * by Tcl_{Lrange,Lreplace,Lsubst}ObjCmd + */ + + result = TclListObjLengthM(interp, listPtr, &listLen); + if (result != TCL_OK) { + return result; + } + + result = TclGetIntForIndexM(interp, objv[2], /*end*/ listLen-1, &first); + if (result != TCL_OK) { + return result; + } + + result = TclGetIntForIndexM(interp, objv[3], /*end*/ listLen-1, &last); + if (result != TCL_OK) { + return result; + } + + if (first == TCL_INDEX_NONE) { + first = 0; + } else if (first > listLen) { + first = listLen; + } + + if (last >= listLen) { + last = listLen - 1; + } + if (first <= last) { + numToDelete = last - first + 1; + } else { + numToDelete = 0; + } + + if (Tcl_IsShared(listPtr)) { + listPtr = TclListObjCopy(NULL, listPtr); + createdNewObj = 1; + } else { + createdNewObj = 0; + } + + result = + Tcl_ListObjReplace(interp, listPtr, first, numToDelete, objc - 4, objv + 4); + if (result != TCL_OK) { + if (createdNewObj) { + Tcl_DecrRefCount(listPtr); + } + return result; + } + + /* + * Tcl_ObjSetVar2 mau return a value different from listPtr in the + * presence of traces etc.. Note that finalValuePtr will always have a + * reference count of at least 1 corresponding to the reference from the + * var. If it is same as listPtr, then ref count will be at least 2 + * since we are incr'ing the latter below (safer when calling + * Tcl_ObjSetVar2 which can release it in some cases). Note that we + * leave the incrref of listPtr this late because we want to pass it as + * unshared to Tcl_ListObjReplace above if possible. + */ + Tcl_IncrRefCount(listPtr); + finalValuePtr = + Tcl_ObjSetVar2(interp, objv[1], NULL, listPtr, TCL_LEAVE_ERR_MSG); + Tcl_DecrRefCount(listPtr); /* safe irrespective of createdNewObj */ + if (finalValuePtr == NULL) { + return TCL_ERROR; + } + + Tcl_SetObjResult(interp, finalValuePtr); + return TCL_OK; +} + +/* + *---------------------------------------------------------------------- + * * MergeLists - * * This procedure combines two sorted lists of SortElement structures diff --git a/generic/tclInt.h b/generic/tclInt.h index 06ec2ad..562140c 100644 --- a/generic/tclInt.h +++ b/generic/tclInt.h @@ -3711,6 +3711,9 @@ MODULE_SCOPE int Tcl_LsetObjCmd(ClientData clientData, MODULE_SCOPE int Tcl_LsortObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]); +MODULE_SCOPE int Tcl_LsubstObjCmd(ClientData clientData, + Tcl_Interp *interp, int objc, + Tcl_Obj *const objv[]); MODULE_SCOPE Tcl_Command TclInitNamespaceCmd(Tcl_Interp *interp); MODULE_SCOPE int TclNamespaceEnsembleCmd(ClientData dummy, Tcl_Interp *interp, int objc, |