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
  21 #include <babeltrace/compiler.h>
  22 #include <babeltrace/align.h>
  23 #include <babeltrace/format.h>
  24
  25 static
  26 struct definition *_string_definition_new(struct declaration *declaration,
  27                                 struct definition_scope *parent_scope,
  28                                 GQuark field_name, int index,
  29                                 const char *root_name);
  30 static
  31 void _string_definition_free(struct definition *definition);
  32
  33 static
  34 void _string_declaration_free(struct declaration *declaration)
  35 {
  36         struct declaration_string *string_declaration =
  37                 container_of(declaration, struct declaration_string, p);
  38         g_free(string_declaration);
  39 }
  40
  41 struct declaration_string *
  42         string_declaration_new(enum ctf_string_encoding encoding)
  43 {
  44         struct declaration_string *string_declaration;
  45
  46         string_declaration = g_new(struct declaration_string, 1);
  47         string_declaration->p.id = CTF_TYPE_STRING;
  48         string_declaration->p.alignment = CHAR_BIT;
  49         string_declaration->p.declaration_free = _string_declaration_free;
  50         string_declaration->p.definition_new = _string_definition_new;
  51         string_declaration->p.definition_free = _string_definition_free;
  52         string_declaration->p.ref = 1;
  53         string_declaration->encoding = encoding;
  54         return string_declaration;
  55 }
  56
  57 static
  58 struct definition *
  59         _string_definition_new(struct declaration *declaration,
  60                                struct definition_scope *parent_scope,
  61                                GQuark field_name, int index,
  62                                const char *root_name)
  63 {
  64         struct declaration_string *string_declaration =
  65                 container_of(declaration, struct declaration_string, p);
  66         struct definition_string *string;
  67         int ret;
  68
  69         string = g_new(struct definition_string, 1);
  70         declaration_ref(&string_declaration->p);
  71         string->p.declaration = declaration;
  72         string->declaration = string_declaration;
  73         string->p.ref = 1;
  74         /*
  75          * Use INT_MAX order to ensure that all fields of the parent
  76          * scope are seen as being prior to this scope.
  77          */
  78         string->p.index = root_name ? INT_MAX : index;
  79         string->p.name = field_name;
  80         string->p.path = new_definition_path(parent_scope, field_name,
  81                                         root_name);
  82         string->p.scope = NULL;
  83         string->value = NULL;
  84         string->len = 0;
  85         string->alloc_len = 0;
  86         ret = register_field_definition(field_name, &string->p,
  87                                         parent_scope);
  88         assert(!ret);
  89         return &string->p;
  90 }
  91
  92 static
  93 void _string_definition_free(struct definition *definition)
  94 {
  95         struct definition_string *string =
  96                 container_of(definition, struct definition_string, p);
  97
  98         declaration_unref(string->p.declaration);
  99         g_free(string->value);
 100         g_free(string);
 101 }
 102
 103 char *get_string(struct definition *field)
 104 {
 105         struct definition_string *string_definition =
 106                 container_of(field, struct definition_string, p);
 107
 108         assert(string_definition->value != NULL);
 109
 110         return string_definition->value;
 111 }