types/string.c

   1 /*
   2  * string.c
   3  *
   4  * BabelTrace - String Type Converter
   5  *
   6  * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
   7  *
   8  * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  23  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  26  * SOFTWARE.
  27  */
  28
  29 #include <babeltrace/compiler.h>
  30 #include <babeltrace/align.h>
  31 #include <babeltrace/format.h>
  32 #include <babeltrace/types.h>
  33
  34 static
  35 struct bt_definition *_string_definition_new(struct bt_declaration *declaration,
  36                                 struct definition_scope *parent_scope,
  37                                 GQuark field_name, int index,
  38                                 const char *root_name);
  39 static
  40 void _string_definition_free(struct bt_definition *definition);
  41
  42 static
  43 void _string_declaration_free(struct bt_declaration *declaration)
  44 {
  45         struct declaration_string *string_declaration =
  46                 container_of(declaration, struct declaration_string, p);
  47         g_free(string_declaration);
  48 }
  49
  50 struct declaration_string *
  51         bt_string_declaration_new(enum ctf_string_encoding encoding)
  52 {
  53         struct declaration_string *string_declaration;
  54
  55         string_declaration = g_new(struct declaration_string, 1);
  56         string_declaration->p.id = CTF_TYPE_STRING;
  57         string_declaration->p.alignment = CHAR_BIT;
  58         string_declaration->p.declaration_free = _string_declaration_free;
  59         string_declaration->p.definition_new = _string_definition_new;
  60         string_declaration->p.definition_free = _string_definition_free;
  61         string_declaration->p.ref = 1;
  62         string_declaration->encoding = encoding;
  63         return string_declaration;
  64 }
  65
  66 static
  67 struct bt_definition *
  68         _string_definition_new(struct bt_declaration *declaration,
  69                                struct definition_scope *parent_scope,
  70                                GQuark field_name, int index,
  71                                const char *root_name)
  72 {
  73         struct declaration_string *string_declaration =
  74                 container_of(declaration, struct declaration_string, p);
  75         struct definition_string *string;
  76         int ret;
  77
  78         string = g_new(struct definition_string, 1);
  79         bt_declaration_ref(&string_declaration->p);
  80         string->p.declaration = declaration;
  81         string->declaration = string_declaration;
  82         string->p.ref = 1;
  83         /*
  84          * Use INT_MAX order to ensure that all fields of the parent
  85          * scope are seen as being prior to this scope.
  86          */
  87         string->p.index = root_name ? INT_MAX : index;
  88         string->p.name = field_name;
  89         string->p.path = bt_new_definition_path(parent_scope, field_name,
  90                                         root_name);
  91         string->p.scope = NULL;
  92         string->value = NULL;
  93         string->len = 0;
  94         string->alloc_len = 0;
  95         ret = bt_register_field_definition(field_name, &string->p,
  96                                         parent_scope);
  97         assert(!ret);
  98         return &string->p;
  99 }
 100
 101 static
 102 void _string_definition_free(struct bt_definition *definition)
 103 {
 104         struct definition_string *string =
 105                 container_of(definition, struct definition_string, p);
 106
 107         bt_declaration_unref(string->p.declaration);
 108         g_free(string->value);
 109         g_free(string);
 110 }
 111
 112 enum ctf_string_encoding bt_get_string_encoding(const struct bt_definition *field)
 113 {
 114         struct definition_string *string_definition;
 115         const struct declaration_string *string_declaration;
 116
 117         string_definition = container_of(field, struct definition_string, p);
 118         string_declaration = string_definition->declaration;
 119
 120         return string_declaration->encoding;
 121 }
 122
 123 char *bt_get_string(const struct bt_definition *field)
 124 {
 125         struct definition_string *string_definition =
 126                 container_of(field, struct definition_string, p);
 127
 128         assert(string_definition->value != NULL);
 129
 130         return string_definition->value;
 131 }