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 declaration *_integer_declaration_new(struct type *type,
  26                                struct declaration_scope *parent_scope);
  27 static
  28 void _integer_declaration_free(struct declaration *declaration);
  29
  30 void integer_copy(struct stream_pos *dest, const struct format *fdest,
  31                   struct stream_pos *src, const struct format *fsrc,
  32                   struct declaration *declaration)
  33 {
  34         struct declaration_integer *integer =
  35                 container_of(declaration, struct declaration_integer, p);
  36         struct type_integer *integer_type = integer->type;
  37
  38         if (!integer_type->signedness) {
  39                 uint64_t v;
  40
  41                 v = fsrc->uint_read(src, integer_type);
  42                 fdest->uint_write(dest, integer_type, v);
  43         } else {
  44                 int64_t v;
  45
  46                 v = fsrc->int_read(src, integer_type);
  47                 fdest->int_write(dest, integer_type, v);
  48         }
  49 }
  50
  51 static
  52 void _integer_type_free(struct type *type)
  53 {
  54         struct type_integer *integer_type =
  55                 container_of(type, struct type_integer, p);
  56         g_free(integer_type);
  57 }
  58
  59 struct type_integer *
  60         integer_type_new(const char *name, size_t len, int byte_order,
  61                          int signedness, size_t alignment)
  62 {
  63         struct type_integer *integer_type;
  64
  65         integer_type = g_new(struct type_integer, 1);
  66         integer_type->p.name = g_quark_from_string(name);
  67         integer_type->p.alignment = alignment;
  68         integer_type->p.copy = integer_copy;
  69         integer_type->p.type_free = _integer_type_free;
  70         integer_type->p.declaration_free = _integer_declaration_free;
  71         integer_type->p.declaration_new = _integer_declaration_new;
  72         integer_type->p.ref = 1;
  73         integer_type->len = len;
  74         integer_type->byte_order = byte_order;
  75         integer_type->signedness = signedness;
  76         return integer_type;
  77 }
  78
  79 static
  80 struct declaration *
  81         _integer_declaration_new(struct type *type,
  82                                  struct declaration_scope *parent_scope)
  83 {
  84         struct type_integer *integer_type =
  85                 container_of(type, struct type_integer, p);
  86         struct declaration_integer *integer;
  87
  88         integer = g_new(struct declaration_integer, 1);
  89         type_ref(&integer_type->p);
  90         integer->p.type = type;
  91         integer->type = integer_type;
  92         integer->p.ref = 1;
  93         integer->value._unsigned = 0;
  94         return &integer->p;
  95 }
  96
  97 static
  98 void _integer_declaration_free(struct declaration *declaration)
  99 {
 100         struct declaration_integer *integer =
 101                 container_of(declaration, struct declaration_integer, p);
 102
 103         type_unref(integer->p.type);
 104         g_free(integer);
 105 }