//  Scicos
//
//  Copyright (C) INRIA - METALAU Project <scicos@inria.fr>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// See the file ../license.txt
//

function [x,y,typ]=SUMMATION(job,arg1,arg2)
    x=[];
    y=[];
    typ=[];
    select job
    case "set" then
        x=arg1;
        graphics=arg1.graphics
        model=arg1.model
        exprs=graphics.exprs
        if size(exprs,1)==1 then
            exprs=[sci2exp(1);exprs;sci2exp(0)];
        elseif size(exprs,1)==2 then
            exprs=[exprs;sci2exp(0)];
        end
        while %t do
            [ok,Datatype,sgn,satur,exprs]=scicos_getvalue("Set sum block parameters",..
            ["Datatype (1=real double  2=complex 3=int32 ...)";..
            "Number of inputs or sign vector (of +1, -1)";..
            "Do on Overflow(0=Nothing 1=Saturate 2=Error)"],..
            list("vec",1,"vec",-1,"vec",1),exprs)
            if ~ok then
                break,
            end
            sgn=sgn(:);
            if (satur~=0&satur~=1&satur~=2) then
                message("Do on overflow must be 0,1,2");
                ok=%f;
            end
            if size(sgn,1)==1 then
                if sgn<1 then
                    message("Number of inputs must be > 0")
                    ok=%f
                elseif sgn==1 then
                    in=-1;in2=-2
                    sgn=[]
                    nout=1;nout2=1
                else
                    in=-ones(sgn,1);
                    in2=2*in
                    sgn=ones(sgn,1)
                    nout=-1;nout2=-2
                end
            else
                if ~and(abs(sgn)==1) then
                    message("Signs can only be +1 or -1")
                    ok=%f
                else
                    in=-ones(size(sgn,1),1);
                    in2=2*in
                    nout=-1;nout2=-2
                end
            end
            it=Datatype*ones(1,size(in,1));
            ot=Datatype;
            if Datatype==1 then
                model.sim=list("summation",4)
            elseif Datatype==2 then
                model.sim=list("summation_z",4)
            elseif ((Datatype<1) |(Datatype>8)) then
                message("Datatype is not supported");ok=%f;
            else
                if satur==0 then
                    if Datatype==3 then
                        model.sim=list("summation_i32n",4)
                    elseif Datatype==4 then
                        model.sim=list("summation_i16n",4)
                    elseif Datatype==5 then
                        model.sim=list("summation_i8n",4)
                    elseif Datatype==6 then
                        model.sim=list("summation_ui32n",4)
                    elseif Datatype==7 then
                        model.sim=list("summation_ui16n",4)
                    elseif Datatype==8 then
                        model.sim=list("summation_ui8n",4)
                    end
                elseif satur==1 then
                    if Datatype==3 then
                        model.sim=list("summation_i32s",4)
                    elseif Datatype==4 then
                        model.sim=list("summation_i16s",4)
                    elseif Datatype==5 then
                        model.sim=list("summation_i8s",4)
                    elseif Datatype==6 then
                        model.sim=list("summation_ui32s",4)
                    elseif Datatype==7 then
                        model.sim=list("summation_ui16s",4)
                    elseif Datatype==8 then
                        model.sim=list("summation_ui8s",4)
                    end
                elseif satur==2 then
                    if Datatype==3 then
                        model.sim=list("summation_i32e",4)
                    elseif Datatype==4 then
                        model.sim=list("summation_i16e",4)
                    elseif Datatype==5 then
                        model.sim=list("summation_i8e",4)
                    elseif Datatype==6 then
                        model.sim=list("summation_ui32e",4)
                    elseif Datatype==7 then
                        model.sim=list("summation_ui16e",4)
                    elseif Datatype==8 then
                        model.sim=list("summation_ui8e",4)
                    end
                end
            end
            if ok then
                [model,graphics,ok]=set_io(model,graphics,...
                list([in,in2],it),...
                list([nout,nout2],ot),[],[])
            end
            if ok then
                model.rpar=satur;
                model.ipar=sgn
                graphics.exprs=exprs
                x.graphics=graphics;
                x.model=model
                break
            end
        end
    case "define" then
        sgn=[1;-1]
        model=scicos_model()
        model.sim=list("summation",4)
        model.in=[-1;-1]
        model.out=-1
        model.in2=[-2;-2]
        model.out2=-2
        model.ipar=sgn
        model.blocktype="c"
        model.dep_ut=[%t %f]


        exprs=sci2exp(sgn)
        gr_i=[]
        x=standard_define([2 3],model, exprs,gr_i)
    end
endfunction