types/integer.c

   1 /*
   2  * integer.c
   3  *
   4  * BabelTrace - Integer Type Converter
   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/compiler.h>
  20 #include <babeltrace/align.h>
  21 #include <babeltrace/format.h>
  22 #include <stdint.h>
  23
  24 static
  25 struct type *_integer_type_new(struct type_class *type_class,
  26                                struct declaration_scope *parent_scope);
  27 static
  28 void _integer_type_free(struct type *type);
  29
  30 void integer_copy(struct stream_pos *dest, const struct format *fdest,
  31                   struct stream_pos *src, const struct format *fsrc,
  32                   struct type *type)
  33 {
  34         struct type_integer *integer = container_of(type, struct type_integer,
  35                                                     p);
  36         struct type_class_integer *int_class = integer->_class;
  37
  38         if (!int_class->signedness) {
  39                 uint64_t v;
  40
  41                 v = fsrc->uint_read(src, int_class);
  42                 fdest->uint_write(dest, int_class, v);
  43         } else {
  44                 int64_t v;
  45
  46                 v = fsrc->int_read(src, int_class);
  47                 fdest->int_write(dest, int_class, v);
  48         }
  49 }
  50
  51 static
  52 void _integer_type_class_free(struct type_class *type_class)
  53 {
  54         struct type_class_integer *integer_class =
  55                 container_of(type_class, struct type_class_integer, p);
  56         g_free(integer_class);
  57 }
  58
  59 struct type_class_integer *
  60 integer_type_class_new(const char *name, size_t len, int byte_order,
  61                        int signedness, size_t alignment)
  62 {
  63         struct type_class_integer *int_class;
  64         int ret;
  65
  66         int_class = g_new(struct type_class_integer, 1);
  67         int_class->p.name = g_quark_from_string(name);
  68         int_class->p.alignment = alignment;
  69         int_class->p.copy = integer_copy;
  70         int_class->p.class_free = _integer_type_class_free;
  71         int_class->p.type_free = _integer_type_free;
  72         int_class->p.type_new = _integer_type_new;
  73         int_class->p.ref = 1;
  74         int_class->len = len;
  75         int_class->byte_order = byte_order;
  76         int_class->signedness = signedness;
  77         if (int_class->p.name) {
  78                 ret = register_type(&int_class->p);
  79                 if (ret) {
  80                         g_free(int_class);
  81                         return NULL;
  82                 }
  83         }
  84         return int_class;
  85 }
  86
  87 static
  88 struct type_integer *_integer_type_new(struct type_class *type_class,
  89                                        struct declaration_scope *parent_scope)
  90 {
  91         struct type_class_integer *integer_class =
  92                 container_of(type_class, struct type_class_integer, p);
  93         struct type_integer *integer;
  94
  95         integer = g_new(struct type_integer, 1);
  96         type_class_ref(&integer_class->p);
  97         integer->p._class = integer_class;
  98         integer->p.ref = 1;
  99         integer->value._unsigned = 0;
 100         return &integer->p;
 101 }
 102
 103 static
 104 void _integer_type_free(struct type *type)
 105 {
 106         struct type_integer *integer =
 107                 container_of(type, struct type_integer, p);
 108
 109         type_class_unref(integer->p._class);
 110         g_free(integer);
 111 }