types/sequence.c

   1 /*
   2  * sequence.c
   3  *
   4  * BabelTrace - Sequence 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/types.h>
  21
  22 void sequence_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_sequence *sequence_class =
  27                 container_of(type_class, struct type_class_sequence, p);
  28         unsigned int i;
  29         size_t len;
  30
  31         fsrc->sequence_begin(src, sequence_class);
  32         fdest->sequence_begin(dest, sequence_class);
  33
  34         len = fsrc->uint_read(src, sequence_class->len_class);
  35         fdest->uint_write(dest, sequence_class->len_class, len);
  36
  37         for (i = 0; i < len; i++) {
  38                 struct type_class *elem_class = sequence_class->elem;
  39                 elem_class->copy(dest, fdest, src, fsrc, &elem_class->p);
  40         }
  41         fsrc->sequence_end(src, sequence_class);
  42         fdest->sequence_end(dest, sequence_class);
  43 }
  44
  45 void sequence_type_free(struct type_class_sequence *sequence_class)
  46 {
  47         sequence_class->elem->free(&sequence_class->elem->p);
  48         g_free(sequence_class);
  49 }
  50
  51 static void _sequence_type_free(struct type_class *type_class)
  52 {
  53         struct type_class_struct *sequence_class =
  54                 container_of(type_class, struct type_class_sequence, p);
  55         sequence_type_free(sequence_class);
  56 }
  57
  58 struct type_class_sequence *
  59 sequence_type_new(const char *name, struct type_class_integer *len_class,
  60                   struct type_class *elem)
  61 {
  62         struct type_class_sequence *sequence_class;
  63         int ret;
  64
  65         sequence_class = g_new(struct type_class_sequence, 1);
  66         type_class = &float_class->p;
  67
  68         assert(!len_class->signedness);
  69
  70         sequence_class->len = len;
  71         type_class->name = g_quark_from_string(name);
  72         type_class->alignment = max(len_class->p.alignment,
  73                                     elem->p.alignment);
  74         type_class->copy = sequence_copy;
  75         type_class->free = _sequence_type_free;
  76
  77         if (type_class->name) {
  78                 ret = ctf_register_type(type_class);
  79                 if (ret)
  80                         goto error_register;
  81         }
  82         return sequence_class;
  83
  84 error_register:
  85         len_class->p.free(&len_class->p);
  86         sequence_class->elem->free(&sequence_class->elem->p);
  87         g_free(sequence_class);
  88         return NULL;
  89 }