formats/ctf/types/enum.c

   1 /*
   2  * Common Trace Format
   3  *
   4  * Enumeration mapping strings (quarks) from/to integers.
   5  *
   6  * Copyright 2010, 2011 - 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/ctf/types.h>
  20 #include <stdint.h>
  21 #include <glib.h>
  22
  23 /*
  24  * The caller should unref the GArray.
  25  */
  26 GArray *ctf_enum_read(struct stream_pos *pos,
  27                       const struct type_class_enum *src)
  28 {
  29         const struct type_class_integer *int_class = &src->p;
  30
  31         if (!int_class->signedness) {
  32                 uint64_t v;
  33
  34                 v = ctf_uint_read(pos, int_class);
  35                 return enum_uint_to_quark_set(src, v);
  36         } else {
  37                 int64_t v;
  38
  39                 v = ctf_int_read(pos, int_class);
  40                 return enum_int_to_quark_set(src, v);
  41         }
  42 }
  43
  44 /*
  45  * Arbitrarily choose the start of the first matching range.
  46  */
  47 void ctf_enum_write(struct stream_pos *pos,
  48                     const struct type_class_enum *dest,
  49                     GQuark q)
  50 {
  51         const struct type_class_integer *int_class = &dest->p;
  52         GArray *array;
  53
  54         array = enum_quark_to_range_set(dest, q);
  55         assert(array);
  56
  57         if (!int_class->signedness) {
  58                 uint64_t v = g_array_index(array, struct enum_range, 0).start._unsigned;
  59                 ctf_uint_write(pos, int_class, v);
  60         } else {
  61                 int64_t v = g_array_index(array, struct enum_range, 0).start._unsigned;
  62                 ctf_int_write(pos, int_class, v);
  63         }
  64 }