types/integer.c

   1 /*
   2  * integer.c
   3  *
   4  * BabelTrace - Integer 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/align.h>
  21 #include <babeltrace/types.h>
  22 #include <stdint.h>
  23
  24 size_t integer_copy(unsigned char *dest, const struct format *fdest,
  25                     const unsigned char *src, const struct format *fsrc,
  26                     const struct type_class *type_class)
  27 {
  28         struct type_class_integer *int_class =
  29                 container_of(type_class, struct type_class_integer, p);
  30
  31         if (!int_class->signedness) {
  32                 uint64_t v;
  33
  34                 v = fsrc->uint_read(src, int_class);
  35                 return fdest->uint_write(dest, int_class, v);
  36         } else {
  37                 int64_t v;
  38
  39                 v = fsrc->int_read(src, int_class);
  40                 return fdest->int_write(dest, int_class, v);
  41         }
  42 }
  43
  44 void integer_type_free(struct type_class_integer *int_class)
  45 {
  46         g_free(int_class);
  47 }
  48
  49 static void _integer_type_free(struct type_class *type_class)
  50 {
  51         struct type_class_integer *int_class =
  52                 container_of(type_class, struct type_class_integer, p);
  53         integer_type_free(int_class);
  54 }
  55
  56 struct type_class_integer *integer_type_new(const char *name,
  57                                             size_t len, int byte_order,
  58                                             int signedness,
  59                                             size_t alignment)
  60 {
  61         struct type_class_integer *int_class;
  62         int ret;
  63
  64         int_class = g_new(struct type_class_integer, 1);
  65         int_class->p.name = g_quark_from_string(name);
  66         int_class->p.alignment = alignment;
  67         int_class->p.copy = integer_copy;
  68         int_class->p.free = _integer_type_free;
  69         int_class->len = len;
  70         int_class->byte_order = byte_order;
  71         int_class->signedness = signedness;
  72         if (int_class->p.name) {
  73                 ret = ctf_register_type(&int_class->p);
  74                 if (ret) {
  75                         g_free(int_class);
  76                         return NULL;
  77                 }
  78         }
  79         return int_class;
  80 }