/usr/include/exo-2/exo/exo-string.h is in libexo-2-dev 0.12.0-1.
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  | /*-
 * Copyright (c) 2004-2007 os-cillation e.K.
 *
 * Written by Benedikt Meurer <benny@xfce.org>.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301 USA
 */
#if !defined (EXO_INSIDE_EXO_H) && !defined (EXO_COMPILATION)
#error "Only <exo/exo.h> can be included directly, this file may disappear or change contents."
#endif
#ifndef __EXO_STRING_H__
#define __EXO_STRING_H__
#include <exo/exo-config.h>
G_BEGIN_DECLS
gchar                *exo_str_elide_underscores  (const gchar     *text) G_GNUC_MALLOC G_GNUC_WARN_UNUSED_RESULT;
gboolean              exo_str_is_equal           (const gchar     *a,
                                                  const gchar     *b);
gchar                *exo_str_replace            (const gchar     *str,
                                                  const gchar     *pattern,
                                                  const gchar     *replacement) G_GNUC_MALLOC G_GNUC_WARN_UNUSED_RESULT;
gchar                *exo_strdup_strftime        (const gchar     *format,
                                                  const struct tm *tm) G_GNUC_MALLOC G_GNUC_WARN_UNUSED_RESULT;
gchar               **exo_strndupv               (gchar          **strv,
                                                  guint            num) G_GNUC_MALLOC G_GNUC_WARN_UNUSED_RESULT;
gboolean              exo_str_looks_like_an_uri  (const gchar     *str);
gboolean              exo_str_is_flag            (const gchar     *str);
/**
 * exo_str_is_empty:
 * @string : a string
 *
 * Macro to check if a string is %NULL or empty. You should prefer
 * this function over strlen (str) == 0.
 *
 * Returns: %TRUE if the string is not %NULL and its length > 1,
 *          %FALSE otherwise.
 *
 * Since : 0.5.0
 **/
#define exo_str_is_empty(string) ((string) == NULL || *(string) == '\0')
/**
 * I_:
 * @string : A static string.
 *
 * Shortcut for g_intern_static_string() to return a
 * canonical representation for @string.
 *
 * Returns: a canonical representation for the string.
 *
 * Since : 0.3.1.1
 **/
#define I_(string) (g_intern_static_string ((string)))
G_END_DECLS
#endif /* !__EXO_STRING_H__ */
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