types/string.c

   1 /*
   2  * BabelTrace - String Type Converter
   3  *
   4  * Copyright (c) 2010 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 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 GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <babeltrace/compiler.h>
  22 #include <babeltrace/align.h>
  23 #include <babeltrace/types.h>
  24
  25 void string_copy(struct stream_pos *dest, const struct format *fdest,
  26                  struct stream_pos *src, const struct format *fsrc,
  27                  const struct type_class *type_class)
  28 {
  29         struct type_class_string *string_class =
  30                 container_of(type_class, struct type_class_string, p);
  31
  32         if (fsrc->string_copy == fdest->string_copy) {
  33                 fsrc->string_copy(dest, src, string_class);
  34         } else {
  35                 unsigned char *tmp = NULL;
  36
  37                 fsrc->string_read(&tmp, src, string_class);
  38                 fdest->string_write(dest, tmp, string_class);
  39                 fsrc->string_free_temp(tmp);
  40         }
  41 }
  42
  43 void string_type_free(struct type_class_string *string_class)
  44 {
  45         g_free(string_class);
  46 }
  47
  48 static void _string_type_free(struct type_class *type_class)
  49 {
  50         struct type_class_string *string_class =
  51                 container_of(type_class, struct type_class_string, p);
  52         string_type_free(string_class);
  53 }
  54
  55 struct type_class_string *string_type_new(const char *name)
  56 {
  57         struct type_class_string *string_class;
  58         int ret;
  59
  60         string_class = g_new(struct type_class_string, 1);
  61         string_class->p.name = g_quark_from_string(name);
  62         string_class->p.alignment = CHAR_BIT;
  63         string_class->p.copy = string_copy;
  64         string_class->p.free = _string_type_free;
  65         if (string_class->p.name) {
  66                 ret = ctf_register_type(&string_class->p);
  67                 if (ret) {
  68                         g_free(string_class);
  69                         return NULL;
  70                 }
  71         }
  72         return string_class;
  73 }