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         if (fdest && (fsrc->string_copy == fdest->string_copy)) {
  39                 fsrc->string_copy(dest, src, string_declaration);
  40         } else {
  41                 char *tmp = NULL;
  42
  43                 fsrc->string_read(&tmp, src, string_declaration);
  44                 if (fdest)
  45                         fdest->string_write(dest, tmp, string_declaration);
  46                 fsrc->string_free_temp(tmp);
  47         }
  48 }
  49
  50 static
  51 void _string_declaration_free(struct declaration *declaration)
  52 {
  53         struct declaration_string *string_declaration =
  54                 container_of(declaration, struct declaration_string, p);
  55         g_free(string_declaration);
  56 }
  57
  58 struct declaration_string *
  59         string_declaration_new(enum ctf_string_encoding encoding)
  60 {
  61         struct declaration_string *string_declaration;
  62
  63         string_declaration = g_new(struct declaration_string, 1);
  64         string_declaration->p.id = CTF_TYPE_STRING;
  65         string_declaration->p.alignment = CHAR_BIT;
  66         string_declaration->p.copy = string_copy;
  67         string_declaration->p.declaration_free = _string_declaration_free;
  68         string_declaration->p.definition_new = _string_definition_new;
  69         string_declaration->p.definition_free = _string_definition_free;
  70         string_declaration->p.ref = 1;
  71         string_declaration->encoding = encoding;
  72         return string_declaration;
  73 }
  74
  75 static
  76 struct definition *
  77         _string_definition_new(struct declaration *declaration,
  78                                struct definition_scope *parent_scope,
  79                                GQuark field_name, int index)
  80 {
  81         struct declaration_string *string_declaration =
  82                 container_of(declaration, struct declaration_string, p);
  83         struct definition_string *string;
  84
  85         string = g_new(struct definition_string, 1);
  86         declaration_ref(&string_declaration->p);
  87         string->p.declaration = declaration;
  88         string->declaration = string_declaration;
  89         string->p.ref = 1;
  90         string->p.index = index;
  91         string->value = NULL;
  92         return &string->p;
  93 }
  94
  95 static
  96 void _string_definition_free(struct definition *definition)
  97 {
  98         struct definition_string *string =
  99                 container_of(definition, struct definition_string, p);
 100
 101         declaration_unref(string->p.declaration);
 102         g_free(string->value);
 103         g_free(string);
 104 }