types/array.c

   1 /*
   2  * array.c
   3  *
   4  * BabelTrace - Array 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/format.h>
  21
  22 static
  23 struct declaration *_array_declaration_new(struct type *type,
  24                         struct declaration_scope *parent_scope);
  25 static
  26 void _array_declaration_free(struct declaration *declaration);
  27
  28 void array_copy(struct stream_pos *dest, const struct format *fdest,
  29                 struct stream_pos *src, const struct format *fsrc,
  30                 struct declaration *declaration)
  31 {
  32         struct declaration_array *array =
  33                 container_of(declaration, struct declaration_array, p);
  34         struct type_array *array_type = array->type;
  35         uint64_t i;
  36
  37         fsrc->array_begin(src, array_type);
  38         fdest->array_begin(dest, array_type);
  39
  40         for (i = 0; i < array_type->len; i++) {
  41                 struct type *elem_type = array->current_element.type;
  42                 elem_type->p.type->copy(dest, fdest, src, fsrc, elem_type);
  43         }
  44         fsrc->array_end(src, array_type);
  45         fdest->array_end(dest, array_type);
  46 }
  47
  48 static
  49 void _array_type_free(struct type *type)
  50 {
  51         struct type_array *array_type =
  52                 container_of(type, struct type_array, p);
  53
  54         type_unref(array_type->elem);
  55         g_free(array_type);
  56 }
  57
  58 struct type_array *
  59         array_type_new(const char *name, size_t len, struct type *elem_type)
  60 {
  61         struct type_array *array_type;
  62         struct type *type;
  63         int ret;
  64
  65         array_type = g_new(struct type_array, 1);
  66         type = &array_type->p;
  67         array_type->len = len;
  68         type_ref(elem_type);
  69         array_type->elem = elem_type;
  70         type->name = g_quark_from_string(name);
  71         /* No need to align the array, the first element will align itself */
  72         type->alignment = 1;
  73         type->copy = array_copy;
  74         type->type_free = _array_type_free;
  75         type->declaration_new = _array_declaration_new;
  76         type->declaration_free = _array_declaration_free;
  77         type->ref = 1;
  78
  79         if (type->name) {
  80                 ret = register_type(type);
  81                 if (ret)
  82                         goto error_register;
  83         }
  84         return array_type;
  85
  86 error_register:
  87         type_unref(array_type->elem);
  88         g_free(array_type);
  89         return NULL;
  90 }
  91
  92 static
  93 struct declaration *
  94         _array_declaration_new(struct type *type,
  95                                struct declaration_scope *parent_scope)
  96 {
  97         struct type_array *array_type =
  98                 container_of(type, struct type_array, p);
  99         struct declaration_array *array;
 100
 101         array = g_new(struct declaration_array, 1);
 102         type_ref(&array_type->p);
 103         array->p.type = array_type;
 104         array->p.ref = 1;
 105         array->scope = new_declaration_scope(parent_scope);
 106         array->current_element.declaration =
 107                 array_type->elem.p->declaration_new(&array_type->elem.p,
 108                                                     parent_scope);
 109         return &array->p;
 110 }
 111
 112 static
 113 void _array_declaration_free(struct declaration *declaration)
 114 {
 115         struct type_array *array =
 116                 container_of(declaration, struct type_array, p);
 117         struct declaration *elem_declaration =
 118                 array->current_element.declaration;
 119
 120         elem_type->p.type->declaration_free(elem_type);
 121         free_declaration_scope(array->scope);
 122         type_unref(array->p.type);
 123         g_free(array);
 124 }