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# graphc.tcl --
#
# Implementation of a graph data structure for Tcl.
# This code based on critcl, API compatible to the PTI [x].
# [x] Pure Tcl Implementation.
#
# Copyright (c) 2006,2019 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.
package require critcl
# @sak notprovided struct_graphc
package provide struct_graphc 2.4.3
package require Tcl 8.2
namespace eval ::struct {
# Supporting code for the main command.
catch {
#critcl::cheaders -g
#critcl::debug memory symbols
}
critcl::cheaders graph/*.h
critcl::csources graph/*.c
critcl::ccode {
/* -*- c -*- */
#include <global.h>
#include <objcmd.h>
#include <graph.h>
#define USAGE "?name ?=|:=|as|deserialize source??"
static void gg_delete (ClientData clientData)
{
/* Release the whole graph. */
g_delete ((G*) clientData);
}
}
# Main command, graph creation.
critcl::ccommand graph_critcl {dummy interp objc objv} {
/* Syntax */
/* - epsilon |1 */
/* - name |2 */
/* - name =|:=|as|deserialize source |4 */
CONST char* name;
G* g;
Tcl_Obj* fqn;
Tcl_CmdInfo ci;
if ((objc != 4) && (objc != 2) && (objc != 1)) {
Tcl_WrongNumArgs (interp, 1, objv, USAGE);
return TCL_ERROR;
}
if (objc < 2) {
name = gg_new (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 graph", -1);
Tcl_DecrRefCount (fqn);
Tcl_SetObjResult (interp, err);
return TCL_ERROR;
}
if (objc == 4) {
/* Construction with immediate initialization */
/* through deserialization */
Tcl_Obj* type = objv[2];
Tcl_Obj* src = objv[3];
int srctype;
static CONST char* types [] = {
":=", "=", "as", "deserialize", NULL
};
enum types {
G_ASSIGN, G_IS, G_AS, G_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;
}
g = g_new ();
switch (srctype) {
case G_ASSIGN:
case G_AS:
case G_IS:
if (g_ms_assign (interp, g, src) != TCL_OK) {
g_delete (g);
Tcl_DecrRefCount (fqn);
return TCL_ERROR;
}
break;
case G_DESER:
if (g_deserialize (g, interp, src) != TCL_OK) {
g_delete (g);
Tcl_DecrRefCount (fqn);
return TCL_ERROR;
}
break;
}
} else {
g = g_new ();
}
g->cmd = Tcl_CreateObjCommand (interp, Tcl_GetString (fqn),
g_objcmd, (ClientData) g,
gg_delete);
Tcl_SetObjResult (interp, fqn);
Tcl_DecrRefCount (fqn);
return TCL_OK;
}
}
# ### ### ### ######### ######### #########
## Ready
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