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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) 2002-2004 - INRIA - Vincent COUVERT
//
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution. The terms
// are also available at
// http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
function [tree]=%log2sci(tree)
// M2SCI function
// Conversion function for Matlab logical operators
// Input: tree = Matlab operation tree
// Output: tree = Scilab equivalent for tree
// Emulation function: mtlb_logic()
[A,B]=getoperands(tree)
A=convert2double(A)
B=convert2double(B)
// Special case for nargout
if typeof(A)=="variable" & typeof(B)=="cste" then
if A.name=="nargout" & B.value==0 then
B=Cste(1)
end
end
if typeof(B)=="variable" & typeof(A)=="cste" then
if B.name=="nargout" & A.value==0 then
A=Cste(1)
end
end
tree.operands=list(A,B)
tree.out(1).type=Type(Boolean,Real)
// Scilab operators >, <, >= and <= do not work with complex values
if or(tree.operator==["<", ">", "<=", ">="]) & (~is_real(A) | ~is_real(B)) then
tree=Funcall("mtlb_logic",1,list(A,Cste(tree.operator),B),tree.out)
tree.lhs(1).dims=A.dims
else
// Cases with empty matrix
if is_empty(A) | is_empty(B) then
// For >, <, >= and <= : Scilab gives an error message if both operands are []
// For == and ~= : Scilab returns %T or %F
set_infos(msprintf(gettext("At least one operand is an empty matrix for operator: %s, result set to []."),expression2code(tree)),1);
tree=Cste([])
elseif is_a_scalar(A) & not_empty(B) then
tree.out(1).dims=B.dims
elseif is_a_scalar(B) & not_empty(A) then
tree.out(1).dims=A.dims
elseif not_empty(A) & not_empty(B) then
tree.out(1).dims=A.dims
else
tree=Funcall("mtlb_logic",1,list(A,Cste(tree.operator),B),tree.out)
tree.lhs(1).dims=A.dims
end
end
endfunction
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