/usr/include/cppad/local/sign_op.hpp is in cppad 2018.00.00.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 | // $Id: sign_op.hpp 3865 2017-01-19 01:57:55Z bradbell $
# ifndef CPPAD_LOCAL_SIGN_OP_HPP
# define CPPAD_LOCAL_SIGN_OP_HPP
/* --------------------------------------------------------------------------
CppAD: C++ Algorithmic Differentiation: Copyright (C) 2003-17 Bradley M. Bell
CppAD is distributed under multiple licenses. This distribution is under
the terms of the
GNU General Public License Version 3.
A copy of this license is included in the COPYING file of this distribution.
Please visit http://www.coin-or.org/CppAD/ for information on other licenses.
-------------------------------------------------------------------------- */
namespace CppAD { namespace local { // BEGIN_CPPAD_LOCAL_NAMESPACE
/*!
\file sign_op.hpp
Forward and reverse mode calculations for z = sign(x).
*/
/*!
Compute forward mode Taylor coefficient for result of op = SignOp.
The C++ source code corresponding to this operation is
\verbatim
z = sign(x)
\endverbatim
\copydetails CppAD::local::forward_unary1_op
*/
template <class Base>
inline void forward_sign_op(
size_t p ,
size_t q ,
size_t i_z ,
size_t i_x ,
size_t cap_order ,
Base* taylor )
{
// check assumptions
CPPAD_ASSERT_UNKNOWN( NumArg(SignOp) == 1 );
CPPAD_ASSERT_UNKNOWN( NumRes(SignOp) == 1 );
CPPAD_ASSERT_UNKNOWN( q < cap_order );
CPPAD_ASSERT_UNKNOWN( p <= q );
// Taylor coefficients corresponding to argument and result
Base* x = taylor + i_x * cap_order;
Base* z = taylor + i_z * cap_order;
if( p == 0 )
{ z[0] = sign(x[0]);
p++;
}
for(size_t j = p; j <= q; j++)
z[j] = Base(0.);
}
/*!
Multiple direction forward mode Taylor coefficient for op = SignOp.
The C++ source code corresponding to this operation is
\verbatim
z = sign(x)
\endverbatim
\copydetails CppAD::local::forward_unary1_op_dir
*/
template <class Base>
inline void forward_sign_op_dir(
size_t q ,
size_t r ,
size_t i_z ,
size_t i_x ,
size_t cap_order ,
Base* taylor )
{
// check assumptions
CPPAD_ASSERT_UNKNOWN( NumArg(SignOp) == 1 );
CPPAD_ASSERT_UNKNOWN( NumRes(SignOp) == 1 );
CPPAD_ASSERT_UNKNOWN( 0 < q );
CPPAD_ASSERT_UNKNOWN( q < cap_order );
// Taylor coefficients corresponding to argument and result
size_t num_taylor_per_var = (cap_order-1) * r + 1;
size_t m = (q - 1) * r + 1;
Base* z = taylor + i_z * num_taylor_per_var;
for(size_t ell = 0; ell < r; ell++)
z[m+ell] = Base(0.);
}
/*!
Compute zero order forward mode Taylor coefficient for result of op = SignOp.
The C++ source code corresponding to this operation is
\verbatim
z = sign(x)
\endverbatim
\copydetails CppAD::local::forward_unary1_op_0
*/
template <class Base>
inline void forward_sign_op_0(
size_t i_z ,
size_t i_x ,
size_t cap_order ,
Base* taylor )
{
// check assumptions
CPPAD_ASSERT_UNKNOWN( NumArg(SignOp) == 1 );
CPPAD_ASSERT_UNKNOWN( NumRes(SignOp) == 1 );
CPPAD_ASSERT_UNKNOWN( 0 < cap_order );
// Taylor coefficients corresponding to argument and result
Base x0 = *(taylor + i_x * cap_order);
Base* z = taylor + i_z * cap_order;
z[0] = sign(x0);
}
/*!
Compute reverse mode partial derivatives for result of op = SignOp.
The C++ source code corresponding to this operation is
\verbatim
z = sign(x)
\endverbatim
\copydetails CppAD::local::reverse_unary1_op
*/
template <class Base>
inline void reverse_sign_op(
size_t d ,
size_t i_z ,
size_t i_x ,
size_t cap_order ,
const Base* taylor ,
size_t nc_partial ,
Base* partial )
{
// check assumptions
CPPAD_ASSERT_UNKNOWN( NumArg(SignOp) == 1 );
CPPAD_ASSERT_UNKNOWN( NumRes(SignOp) == 1 );
CPPAD_ASSERT_UNKNOWN( d < cap_order );
CPPAD_ASSERT_UNKNOWN( d < nc_partial );
// nothing to do because partials of sign are zero
return;
}
} } // END_CPPAD_LOCAL_NAMESPACE
# endif
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