formats/ctf/types/enum.c

   1 /*
   2  * Common Trace Format
   3  *
   4  * Enumeration mapping strings (quarks) from/to integers.
   5  *
   6  * Copyright (c) 2010 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #include <babeltrace/ctf/types.h>
  24 #include <stdint.h>
  25 #include <glib.h>
  26
  27 GQuark ctf_enum_read(const unsigned char *ptr,
  28                      const struct type_class_enum *src)
  29 {
  30         struct type_class_bitfield *bitfield_class = &src->p;
  31         struct type_class_integer *int_class = &bitfield_class->p;
  32
  33         if (!int_class->signedness) {
  34                 uint64_t v;
  35
  36                 v = ctf_bitfield_unsigned_read(src,
  37                                         bitfield_class->start_offset,
  38                                         int_class->len,
  39                                         int_class->byte_order);
  40                 return enum_uint_to_quark(src, v);
  41         } else {
  42                 int64_t v;
  43
  44                 v = fsrc->bitfield_signed_read(src,
  45                                         bitfield_class->start_offset,
  46                                         int_class->len,
  47                                         int_class->byte_order);
  48                 return enum_int_to_quark(src, v);
  49         }
  50 }
  51
  52 size_t ctf_enum_write(unsigned char *ptr, const struct type_class_enum *dest,
  53                       GQuark q)
  54 {
  55         struct type_class_bitfield *bitfield_class = &dest->p;
  56         struct type_class_integer *int_class = &bitfield_class->p;
  57
  58         if (!int_class->signedness) {
  59                 uint64_t v;
  60
  61                 v = enum_quark_to_uint(dest, q);
  62                 return ctf_bitfield_unsigned_write(src,
  63                                         bitfield_class->start_offset,
  64                                         int_class->len,
  65                                         int_class->byte_order, v);
  66         } else {
  67                 int64_t v;
  68
  69                 v = enum_quark_to_int(dest, q);
  70                 return ctf_bitfield_signed_write(src,
  71                                         bitfield_class->start_offset,
  72                                         int_class->len,
  73                                         int_class->byte_order, v);
  74         }
  75 }