/usr/include/gwyddion/libprocess/arithmetic.h is in libgwyddion20-dev 2.44-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* @(#) $Id: arithmetic.h 16015 2014-03-21 13:58:15Z yeti-dn $
* Copyright (C) 2003 David Necas (Yeti), Petr Klapetek.
* E-mail: yeti@gwyddion.net, klapetek@gwyddion.net.
*
* 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.
*/
#ifndef __GWY_PROCESS_ARITHMETIC_H__
#define __GWY_PROCESS_ARITHMETIC_H__
#include <libprocess/datafield.h>
G_BEGIN_DECLS
void gwy_data_field_sum_fields (GwyDataField *result,
GwyDataField *operand1,
GwyDataField *operand2);
void gwy_data_field_subtract_fields (GwyDataField *result,
GwyDataField *operand1,
GwyDataField *operand2);
void gwy_data_field_divide_fields (GwyDataField *result,
GwyDataField *operand1,
GwyDataField *operand2);
void gwy_data_field_multiply_fields (GwyDataField *result,
GwyDataField *operand1,
GwyDataField *operand2);
void gwy_data_field_min_of_fields (GwyDataField *result,
GwyDataField *operand1,
GwyDataField *operand2);
void gwy_data_field_max_of_fields (GwyDataField *result,
GwyDataField *operand1,
GwyDataField *operand2);
void gwy_data_field_hypot_of_fields (GwyDataField *result,
GwyDataField *operand1,
GwyDataField *operand2);
GwyDataCompatibilityFlags
gwy_data_field_check_compatibility(GwyDataField *data_field1,
GwyDataField *data_field2,
GwyDataCompatibilityFlags check);
GwyDataCompatibilityFlags
gwy_data_line_check_compatibility(GwyDataLine *data_line1,
GwyDataLine *data_line2,
GwyDataCompatibilityFlags check);
GwyDataField* gwy_data_field_extend(GwyDataField *data_field,
guint left,
guint right,
guint up,
guint down,
GwyExteriorType exterior,
gdouble fill_value,
gboolean keep_offsets);
G_END_DECLS
#endif /* __GWY_PROCESS_ARITHMETIC_H__ */
/* vim: set cin et ts=4 sw=4 cino=>1s,e0,n0,f0,{0,}0,^0,\:1s,=0,g1s,h0,t0,+1s,c3,(0,u0 : */
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