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 definition *_string_definition_new(struct declaration *declaration,
  25                                 struct definition_scope *parent_scope,
  26                                 GQuark field_name, int index);
  27 static
  28 void _string_definition_free(struct definition *definition);
  29
  30 void string_copy(struct stream_pos *dest, const struct format *fdest,
  31                  struct stream_pos *src, const struct format *fsrc,
  32                  struct definition *definition)
  33 {
  34         struct definition_string *string =
  35                 container_of(definition, struct definition_string, p);
  36         struct declaration_string *string_declaration = string->declaration;
  37
  38         g_free(string->value);
  39         string->value = NULL;
  40         fsrc->string_read(&string->value, src, string_declaration);
  41         if (fdest)
  42                 fdest->string_write(dest, string->value, string_declaration);
  43 }
  44
  45 static
  46 void _string_declaration_free(struct declaration *declaration)
  47 {
  48         struct declaration_string *string_declaration =
  49                 container_of(declaration, struct declaration_string, p);
  50         g_free(string_declaration);
  51 }
  52
  53 struct declaration_string *
  54         string_declaration_new(enum ctf_string_encoding encoding)
  55 {
  56         struct declaration_string *string_declaration;
  57
  58         string_declaration = g_new(struct declaration_string, 1);
  59         string_declaration->p.id = CTF_TYPE_STRING;
  60         string_declaration->p.alignment = CHAR_BIT;
  61         string_declaration->p.copy = string_copy;
  62         string_declaration->p.declaration_free = _string_declaration_free;
  63         string_declaration->p.definition_new = _string_definition_new;
  64         string_declaration->p.definition_free = _string_definition_free;
  65         string_declaration->p.ref = 1;
  66         string_declaration->encoding = encoding;
  67         return string_declaration;
  68 }
  69
  70 static
  71 struct definition *
  72         _string_definition_new(struct declaration *declaration,
  73                                struct definition_scope *parent_scope,
  74                                GQuark field_name, int index)
  75 {
  76         struct declaration_string *string_declaration =
  77                 container_of(declaration, struct declaration_string, p);
  78         struct definition_string *string;
  79
  80         string = g_new(struct definition_string, 1);
  81         declaration_ref(&string_declaration->p);
  82         string->p.declaration = declaration;
  83         string->declaration = string_declaration;
  84         string->p.ref = 1;
  85         string->p.index = index;
  86         string->value = NULL;
  87         return &string->p;
  88 }
  89
  90 static
  91 void _string_definition_free(struct definition *definition)
  92 {
  93         struct definition_string *string =
  94                 container_of(definition, struct definition_string, p);
  95
  96         declaration_unref(string->p.declaration);
  97         g_free(string->value);
  98         g_free(string);
  99 }