types/array.c

   1 /*
   2  * array.c
   3  *
   4  * BabelTrace - Array Type Converter
   5  *
   6  * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  */
  18
  19 #include <babeltrace/compiler.h>
  20 #include <babeltrace/format.h>
  21
  22 void array_copy(struct stream_pos *dest, const struct format *fdest,
  23                 struct stream_pos *src, const struct format *fsrc,
  24                 const struct type_class *type_class)
  25 {
  26         struct type_class_array *array_class =
  27                 container_of(type_class, struct type_class_array, p);
  28         unsigned int i;
  29
  30         fsrc->array_begin(src, array_class);
  31         fdest->array_begin(dest, array_class);
  32
  33         for (i = 0; i < array_class->len; i++) {
  34                 struct type_class *elem_class = array_class->elem;
  35                 elem_class->copy(dest, fdest, src, fsrc, elem_class);
  36         }
  37         fsrc->array_end(src, array_class);
  38         fdest->array_end(dest, array_class);
  39 }
  40
  41 void array_type_free(struct type_class_array *array_class)
  42 {
  43         type_unref(array_class->elem);
  44         g_free(array_class);
  45 }
  46
  47 static void _array_type_free(struct type_class *type_class)
  48 {
  49         struct type_class_array *array_class =
  50                 container_of(type_class, struct type_class_array, p);
  51         array_type_free(array_class);
  52 }
  53
  54 struct type_class_array *array_type_new(const char *name, size_t len,
  55                                         struct type_class *elem)
  56 {
  57         struct type_class_array *array_class;
  58         struct type_class *type_class;
  59         int ret;
  60
  61         array_class = g_new(struct type_class_array, 1);
  62         type_class = &array_class->p;
  63
  64         array_class->len = len;
  65         type_ref(elem);
  66         array_class->elem = elem;
  67         type_class->name = g_quark_from_string(name);
  68         /* No need to align the array, the first element will align itself */
  69         type_class->alignment = 1;
  70         type_class->copy = array_copy;
  71         type_class->free = _array_type_free;
  72         type_class->ref = 1;
  73
  74         if (type_class->name) {
  75                 ret = ctf_register_type(type_class);
  76                 if (ret)
  77                         goto error_register;
  78         }
  79         return array_class;
  80
  81 error_register:
  82         type_unref(array_class->elem);
  83         g_free(array_class);
  84         return NULL;
  85 }