src/misc/trim.c

   1 /* libquvi
   2  * Copyright (C) 2012  Toni Gundogdu <legatvs@gmail.com>
   3  *
   4  * This file is part of libquvi <http://quvi.sourceforge.net/>.
   5  *
   6  * This library is free software: you can redistribute it and/or
   7  * modify it under the terms of the GNU Affero General Public
   8  * License as published by the Free Software Foundation, either
   9  * version 3 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU Affero General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Affero General
  17  * Public License along with this library.  If not, see
  18  * <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "config.h"
  22
  23 #include <glib.h>
  24
  25 /* -- */
  26 #include "misc/re.h"
  27
  28 #define _W "[%s] libquvi: %s"
  29
  30 gchar *m_trim(const gchar *s, const gchar *p, const gchar *w)
  31 {
  32   GError *err;
  33   GRegex *re;
  34   gchar *r;
  35
  36   err = NULL;
  37   re = g_regex_new(p, 0, 0, &err);
  38
  39   if (err != NULL)
  40     {
  41       g_warning(_W, __func__, err->message);
  42       g_error_free(err);
  43       err = NULL;
  44       return (NULL);
  45     }
  46
  47   r = g_regex_replace(re, s, -1, 0, w, 0, &err);
  48   if (err != NULL)
  49     {
  50       g_warning(_W, __func__, err->message);
  51       g_error_free(err);
  52       err = NULL;
  53       r = NULL;
  54     }
  55
  56   g_regex_unref(re);
  57   re = NULL;
  58
  59   return (r);
  60 }
  61
  62 /* Trim null-terminated string of extra whitespace. */
  63 gchar *m_trim_ws(const gchar *s)
  64 {
  65   gchar *u, *t;
  66
  67   u = NULL;
  68   t = m_trim(s, "^\\s*(.+?)\\s*$", "\\1");
  69
  70   if (t != NULL)
  71     {
  72       u = m_trim(t, "\\s\\s+", " ");
  73       g_free(t);
  74       t = NULL;
  75     }
  76   return (u);
  77 }
  78
  79 /* vim: set ts=2 sw=2 tw=72 expandtab: */