[Scilab-users] overloading concat "[ ]" operators

[Pierre Vuillemin]

Hi Philippe,

You can create another object, a matrix of bing int that stacks your 
bigint in a list, i.e.

x = tlist(["bigint","rep","signe"],[7654321;5678998;1234],1)
y = tlist(["bigint","rep","signe"],[3456789;5432112;9876],1)
X = tlist(["mbigint","entries"],list(x,y))

Then  you can overload the display for "mbigint" for instance with

function %mbigint_p(e)
     str = ""
     for i = 1:length(e.entries)
         for j =length(e.entries(i).rep):-1:1
             str =  sprintf("%s%d",str,e.entries(i).rep(j))
         end
         str = str +"\n"
     end
     printf(str)
endfunction

If you want to make matrix (not only vectors), then you need to add the 
size of the matrix as an attribute of "mbigint" and reshape the display 
accordingly.


Pierre.

Le 01.07.2016 10:41, philippe a écrit :
> Hi,
> 
> I have created a simple data structure  to handle "big integers" . It 
> is
>  based on scilab tlist  and named "bigint" . I have overloaded basic
> unary/binary operators for bigint (like +,*,-,/,^,==,<,>,... ) :
> 
> 
> 
> -->x=bigint('123456789987654321')
>  x  =
> 
> 
>  123456789987654321
> 
> -->y=bigint('987654321123456789')
>  y  =
> 
> 
>  987654321123456789
> 
> -->z=x-y
> z =
> 
> 
> -864197531135802468
> 
> 
> 
> but now I want to create matrix of bigint  so I need to create
> functions like %bigint_c_bigint   and %bigint_f_bigint . I try using
> "cell" It's not exactly what I was expecting : matrix entries  are
> displayed as tlist  instead of bigint display (modified via %bigint_p )
> 
> 
> 
> -->T=cell()
>  T  =
> 
> 
>      []
> 
> 
> 
> -->T(1).entries=x
>  T  =
> 
> 
>  tlist(["bigint","rep","signe"],[7654321;5678998;1234],1)
> 
> -->T(2).entries=y
>  T  =
> 
> 
> !tlist(["bigint","rep","signe"],[7654321;5678998;1234],1)  !
> !                                                          !
> !tlist(["bigint","rep","signe"],[3456789;5432112;9876],1)  !
> 
> 
> -->T(3).entries=z
>  T  =
> 
> 
> !tlist(["bigint","rep","signe"],[7654321;5678998;1234],1)   !
> !                                                           !
> !tlist(["bigint","rep","signe"],[3456789;5432112;9876],1)   !
> !                                                           !
> !tlist(["bigint","rep","signe"],[5802468;9753113;8641],-1)  !
> 
> 
> 
> how could I get  a display like
> 
> 
> -->T
> T =
> 
> 
> !  123456789987654321 !
> !                     !
> !  987654321123456789 !
> !                     !
> ! -864197531135802468 !
> 
> 
> 
> actually I only get
> 
> -->T.entries
>  ans  =
> 
> 
>        ans(1)
> 
> 
>  123456789987654321
> 
>        ans(2)
> 
> 
>  987654321123456789
> 
>        ans(3)
> 
> 
>  -864197531135802468
> 
> 
> 
> Philippe
> 
> _______________________________________________
> users mailing list
> users at lists.scilab.org
> http://lists.scilab.org/mailman/listinfo/users