/usr/include/gwyddion/libgwyddion/gwyexpr.h is in libgwyddion20-dev 2.38-2.
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: gwyexpr.h 15598 2013-11-11 12:33:32Z 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_EXPR_H__
#define __GWY_EXPR_H__
#include <glib.h>
G_BEGIN_DECLS
#define GWY_EXPR_ERROR gwy_expr_error_quark()
typedef enum {
GWY_EXPR_ERROR_CLOSING_PARENTHESIS,
GWY_EXPR_ERROR_EMPTY,
GWY_EXPR_ERROR_EMPTY_PARENTHESES,
GWY_EXPR_ERROR_GARBAGE,
GWY_EXPR_ERROR_INVALID_ARGUMENT,
GWY_EXPR_ERROR_INVALID_TOKEN,
GWY_EXPR_ERROR_MISSING_ARGUMENT,
GWY_EXPR_ERROR_NOT_EXECUTABLE,
GWY_EXPR_ERROR_OPENING_PARENTHESIS,
GWY_EXPR_ERROR_STRAY_COMMA,
GWY_EXPR_ERROR_UNRESOLVED_IDENTIFIERS,
GWY_EXPR_ERROR_CONSTANT_NAME
} GwyExprError;
typedef struct _GwyExpr GwyExpr;
GQuark gwy_expr_error_quark (void);
GwyExpr* gwy_expr_new (void);
void gwy_expr_free (GwyExpr *expr);
gboolean gwy_expr_evaluate (GwyExpr *expr,
const gchar *text,
gdouble *result,
GError **err);
gboolean gwy_expr_compile (GwyExpr *expr,
const gchar *text,
GError **err);
guint gwy_expr_resolve_variables (GwyExpr *expr,
guint n,
const gchar * const *names,
guint *indices);
gint gwy_expr_get_variables (GwyExpr *expr,
gchar ***names);
gdouble gwy_expr_execute (GwyExpr *expr,
const gdouble *values);
void gwy_expr_vector_execute (GwyExpr *expr,
guint n,
const gdouble **data,
gdouble *result);
gboolean gwy_expr_define_constant (GwyExpr *expr,
const gchar *name,
gdouble value,
GError **err);
gboolean gwy_expr_undefine_constant (GwyExpr *expr,
const gchar *name);
const gchar* gwy_expr_get_expression (GwyExpr *expr);
G_END_DECLS
#endif /* __GWY_EXPR_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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