types/string.c

   1 /*
   2  * string.c
   3  *
   4  * BabelTrace - String 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
  23 static
  24 struct type_string *_string_type_new(struct type_class *type_class,
  25                                      struct declaration_scope *parent_scope);
  26 static
  27 void _string_type_free(struct type *type);
  28
  29 void string_copy(struct stream_pos *dest, const struct format *fdest,
  30                  struct stream_pos *src, const struct format *fsrc,
  31                  struct type *type)
  32 {
  33         struct type_string *string = container_of(type, struct type_string, p);
  34         struct type_class_string *string_class = string->_class;
  35
  36         if (fsrc->string_copy == fdest->string_copy) {
  37                 fsrc->string_copy(dest, src, string_class);
  38         } else {
  39                 char *tmp = NULL;
  40
  41                 fsrc->string_read(&tmp, src, string_class);
  42                 fdest->string_write(dest, tmp, string_class);
  43                 fsrc->string_free_temp(tmp);
  44         }
  45 }
  46
  47 static
  48 void _string_type_class_free(struct type_class_string *string_class)
  49 {
  50         struct type_class_string *string_class =
  51                 container_of(type_class, struct type_class_string, p);
  52         g_free(string_class);
  53 }
  54
  55 struct type_class_string *
  56 string_type_class_new(const char *name)
  57 {
  58         struct type_class_string *string_class;
  59         int ret;
  60
  61         string_class = g_new(struct type_class_string, 1);
  62         string_class->p.name = g_quark_from_string(name);
  63         string_class->p.alignment = CHAR_BIT;
  64         string_class->p.copy = string_copy;
  65         string_class->p.class_free = _string_type_class_free;
  66         string_class->p.type_new = _string_type_new;
  67         string_class->p.type_free = _string_type_free;
  68         string_class->p.ref = 1;
  69         if (string_class->p.name) {
  70                 ret = register_type(&string_class->p);
  71                 if (ret) {
  72                         g_free(string_class);
  73                         return NULL;
  74                 }
  75         }
  76         return string_class;
  77 }
  78
  79 static
  80 struct type_string *_string_type_new(struct type_class *type_class,
  81                                      struct declaration_scope *parent_scope)
  82 {
  83         struct type_class_string *string_class =
  84                 container_of(type_class, struct type_class_string, p);
  85         struct type_string *string;
  86
  87         string = g_new(struct type_string, 1);
  88         type_class_ref(&string_class->p);
  89         string->p._class = string_class;
  90         string->p.ref = 1;
  91         string->value = NULL;
  92         return &string->p;
  93 }
  94
  95 static
  96 void _string_type_free(struct type *type)
  97 {
  98         struct type_string *string =
  99                 container_of(type, struct type_string, p);
 100
 101         type_class_unref(string->p._class);
 102         g_free(string->value);
 103         g_free(string);
 104 }