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 declaration *_string_declaration_new(struct type *type,
  25                                 struct declaration_scope *parent_scope);
  26 static
  27 void _string_declaration_free(struct declaration *declaration);
  28
  29 void string_copy(struct stream_pos *dest, const struct format *fdest,
  30                  struct stream_pos *src, const struct format *fsrc,
  31                  struct declaration *declaration)
  32 {
  33         struct declaration_string *string =
  34                 container_of(declaration, struct declaration_string, p);
  35         struct type_string *string_type = string->type;
  36
  37         if (fsrc->string_copy == fdest->string_copy) {
  38                 fsrc->string_copy(dest, src, string_type);
  39         } else {
  40                 char *tmp = NULL;
  41
  42                 fsrc->string_read(&tmp, src, string_type);
  43                 fdest->string_write(dest, tmp, string_type);
  44                 fsrc->string_free_temp(tmp);
  45         }
  46 }
  47
  48 static
  49 void _string_type_free(struct type *type)
  50 {
  51         struct type_string *string_type =
  52                 container_of(type, struct type_string, p);
  53         g_free(string_type);
  54 }
  55
  56 struct type_string *string_type_new(const char *name)
  57 {
  58         struct type_string *string_type;
  59
  60         string_type = g_new(struct type_string, 1);
  61         string_type->p.id = CTF_TYPE_STRING;
  62         string_type->p.name = g_quark_from_string(name);
  63         string_type->p.alignment = CHAR_BIT;
  64         string_type->p.copy = string_copy;
  65         string_type->p.type_free = _string_type_free;
  66         string_type->p.declaration_new = _string_declaration_new;
  67         string_type->p.declaration_free = _string_declaration_free;
  68         string_type->p.ref = 1;
  69         return string_type;
  70 }
  71
  72 static
  73 struct declaration *
  74         _string_declaration_new(struct type *type,
  75                                 struct declaration_scope *parent_scope)
  76 {
  77         struct type_string *string_type =
  78                 container_of(type, struct type_string, p);
  79         struct declaration_string *string;
  80
  81         string = g_new(struct declaration_string, 1);
  82         type_ref(&string_type->p);
  83         string->p.type = type;
  84         string->type = string_type;
  85         string->p.ref = 1;
  86         string->value = NULL;
  87         return &string->p;
  88 }
  89
  90 static
  91 void _string_declaration_free(struct declaration *declaration)
  92 {
  93         struct declaration_string *string =
  94                 container_of(declaration, struct declaration_string, p);
  95
  96         type_unref(string->p.type);
  97         g_free(string->value);
  98         g_free(string);
  99 }