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# treec.tcl --
#
# Implementation of a tree data structure for Tcl.
# This code based on critcl, API compatible to the PTI [x].
# [x] Pure Tcl Implementation.
#
# Copyright (c) 2005 Andreas Kupries <andreas_kupries@users.sourceforge.net>
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
# RCS: @(#) $Id: tree_c.tcl,v 1.6 2008/03/25 07:15:34 andreas_kupries Exp $
package require critcl
# @sak notprovided struct_treec
package provide struct_treec 2.1.1
package require Tcl 8.2
namespace eval ::struct {
# Supporting code for the main command.
catch {
#critcl::cheaders -g
#critcl::debug memory symbols
}
critcl::cheaders tree/*.h
critcl::csources tree/*.c
critcl::ccode {
/* -*- c -*- */
#include <util.h>
#include <t.h>
#include <tn.h>
#include <ms.h>
#include <m.h>
/* .................................................. */
/* Global tree management, per interp
*/
typedef struct TDg {
long int counter;
char buf [50];
} TDg;
static void
TDgrelease (ClientData cd, Tcl_Interp* interp)
{
ckfree((char*) cd);
}
static CONST char*
TDnewName (Tcl_Interp* interp)
{
#define KEY "tcllib/struct::tree/critcl"
Tcl_InterpDeleteProc* proc = TDgrelease;
TDg* tdg;
tdg = Tcl_GetAssocData (interp, KEY, &proc);
if (tdg == NULL) {
tdg = (TDg*) ckalloc (sizeof (TDg));
tdg->counter = 0;
Tcl_SetAssocData (interp, KEY, proc,
(ClientData) tdg);
}
tdg->counter ++;
sprintf (tdg->buf, "tree%d", tdg->counter);
return tdg->buf;
#undef KEY
}
static void
TDdeleteCmd (ClientData clientData)
{
/* Release the whole tree. */
t_delete ((T*) clientData);
}
}
# Main command, tree creation.
critcl::ccommand tree_critcl {dummy interp objc objv} {
/* Syntax
* - epsilon |1
* - name |2
* - name =|:=|as|deserialize source |4
*/
CONST char* name;
T* td;
Tcl_Obj* fqn;
Tcl_CmdInfo ci;
#define USAGE "?name ?=|:=|as|deserialize source??"
if ((objc != 4) && (objc != 2) && (objc != 1)) {
Tcl_WrongNumArgs (interp, 1, objv, USAGE);
return TCL_ERROR;
}
if (objc < 2) {
name = TDnewName (interp);
} else {
name = Tcl_GetString (objv [1]);
}
if (!Tcl_StringMatch (name, "::*")) {
/* Relative name. Prefix with current namespace */
Tcl_Eval (interp, "namespace current");
fqn = Tcl_GetObjResult (interp);
fqn = Tcl_DuplicateObj (fqn);
Tcl_IncrRefCount (fqn);
if (!Tcl_StringMatch (Tcl_GetString (fqn), "::")) {
Tcl_AppendToObj (fqn, "::", -1);
}
Tcl_AppendToObj (fqn, name, -1);
} else {
fqn = Tcl_NewStringObj (name, -1);
Tcl_IncrRefCount (fqn);
}
Tcl_ResetResult (interp);
if (Tcl_GetCommandInfo (interp,
Tcl_GetString (fqn),
&ci)) {
Tcl_Obj* err;
err = Tcl_NewObj ();
Tcl_AppendToObj (err, "command \"", -1);
Tcl_AppendObjToObj (err, fqn);
Tcl_AppendToObj (err, "\" already exists, unable to create tree", -1);
Tcl_DecrRefCount (fqn);
Tcl_SetObjResult (interp, err);
return TCL_ERROR;
}
if (objc == 4) {
Tcl_Obj* type = objv[2];
Tcl_Obj* src = objv[3];
int srctype;
static CONST char* types [] = {
":=", "=", "as", "deserialize", NULL
};
enum types {
T_ASSIGN, T_IS, T_AS, T_DESER
};
if (Tcl_GetIndexFromObj (interp, type, types, "type",
0, &srctype) != TCL_OK) {
Tcl_DecrRefCount (fqn);
Tcl_ResetResult (interp);
Tcl_WrongNumArgs (interp, 1, objv, USAGE);
return TCL_ERROR;
}
td = t_new ();
switch (srctype) {
case T_ASSIGN:
case T_AS:
case T_IS:
if (tms_assign (interp, td, src) != TCL_OK) {
t_delete (td);
Tcl_DecrRefCount (fqn);
return TCL_ERROR;
}
break;
case T_DESER:
if (t_deserialize (td, interp, src) != TCL_OK) {
t_delete (td);
Tcl_DecrRefCount (fqn);
return TCL_ERROR;
}
break;
}
} else {
td = t_new ();
}
td->cmd = Tcl_CreateObjCommand (interp, Tcl_GetString (fqn),
tms_objcmd, (ClientData) td,
TDdeleteCmd);
Tcl_SetObjResult (interp, fqn);
Tcl_DecrRefCount (fqn);
return TCL_OK;
}
namespace eval tree {
critcl::ccommand prune_critcl {dummy interp objc objv} {
return 5;
}
}
}
# ### ### ### ######### ######### #########
## Ready
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