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#############################################################################
##
#A codefun.gi GUAVA Reinald Baart
#A &Jasper Cramwinckel
#A &Erik Roijackers
##
## This file contains non-dispatched functions to get info of codes
##
#H @(#)$Id: codefun.gi,v 1.2 2003/02/12 03:49:16 gap Exp $
##
Revision.("guava/lib/codefun_gi") :=
"@(#)$Id: codefun.gi,v 1.2 2003/02/12 03:49:16 gap Exp $";
#############################################################################
##
#F GuavaToLeon( <C>, <file> ) . converts a code to a form Leon can read it
##
## converts a code in Guava format to a library in a format that is readable
## by Leon's programs.
##
InstallMethod(GuavaToLeon, "method for unrestricted code, filename",
true, [IsCode, IsString], 0,
function (C, file)
local w, vector, G, coord, n, k, TheMat, IR1SAVE, IR2SAVE;
G := GeneratorMat(C);
k := Dimension(C);
n := WordLength(C);
PrintTo(file, "LIBRARY code;\n");
# using "String" here causes problems when this function
# is run before the string library is loaded *and* InfoRead1
# and/or InfoRead2 is set to "Print".
##LR - is this still needed?
# ugly hack: temporarily disable InfoRead1 and InfoRead2
IR1SAVE := InfoRead1; InfoRead1 := Ignore;
IR2SAVE := InfoRead2; InfoRead2 := Ignore;
AppendTo(file,"code=seq(",String(Size(LeftActingDomain(C))),",",String(k),
",",String(n),",seq(\n");
InfoRead1 := IR1SAVE;
InfoRead2 := IR2SAVE;
# end of ugly hack.
for vector in [1..k] do
for coord in [1..n-1] do
AppendTo(file,IntFFE(G[vector][coord]),",");
od;
AppendTo(file, IntFFE(G[vector][n]));
if vector < k then
AppendTo(file,",\n");
fi;
od;
AppendTo(file, "\n));\nFINISH;");
end);
#############################################################################
##
#F WeightHistogram ( <C> [, <height>] ) . . . . . plots the weights of <C>
##
## The maximum length of the columns is <height>. Default height is one
## third of the screen size.
##
InstallMethod(WeightHistogram,
"method for unrestricted code and screen height",
true, [IsCode, IsInt], 0,
function(C, height)
local wd, max, data, i, j, n, spaces, nr, Scr, char;
Scr := SizeScreen();
char := "*";
n := WordLength(C);
if n+2 >= Scr[1] then
Error("histogram does not fit on screen");
elif n+2 > Int(Scr[1] / 2) then
spaces := "";
nr := 0;
elif n+2 > Int(Scr[1] / 4) then
spaces := " ";
nr := 1;
else
spaces := " ";
nr := 2;
fi;
wd := WeightDistribution(C);
max := Maximum(wd);
if max < height then
height := max;
fi;
data := List(wd, w -> Int(w/max*height));
Print(max);
for i in [0..n*(nr+1)-Length(String(max))] do
Print("-");
od;
Print("\n");
for i in height - [0..height-1] do
for j in data do
if j >= i then
Print(Concatenation(char,spaces));
else
Print(Concatenation(" ",spaces));
fi;
od;
Print("\n");
od;
for i in [0..n] do
if wd[i+1] = 0 then
Print("-");
else
Print("+");
fi;
for j in [2..nr+1] do
Print("-");
od;
#Print("-");
od;
Print("\n");
for i in [0..n] do
Print(i mod 10,spaces);
od;
Print("\n ",spaces);
for i in [1..n] do
if i mod 10 = 0 then
Print(Int(i / 10),spaces);
else
Print(" ",spaces);
fi;
od;
Print("\n");
end);
InstallOtherMethod(WeightHistogram, "method for unrestricted code", true,
[IsCode], 0,
function(C)
local Scr;
Scr := SizeScreen();
WeightHistogram(C, Int(Scr[2]/3));
end);
#############################################################################
##
#F MergeHistories( <C>, <S> [, <C1> .. <Cn> ] ) . . . . . . list of strings
##
##
InstallGlobalFunction(MergeHistories,
function(arg)
local i, his, names;
if Length( arg ) > 1 then
names := "UVWXYZ";
his := [];
for i in [1..Length(arg)] do
Add(his, Concatenation( [ names[i] ], ": ", arg[i][1]) );
Append( his, List( arg[i]{[2..Length(arg[i])]}, line ->
Concatenation(" ", line ) ) );
od;
return his;
else
Error("usage: MergeHistories( <C1> , <C2> [, <C3> .. <Cn> ] )");
fi;
end);
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