formats/ctf/types/sequence.c

   1 /*
   2  * Common Trace Format
   3  *
   4  * Sequence format access functions.
   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/ctf/types.h>
  30
  31 int ctf_sequence_read(struct bt_stream_pos *ppos, struct bt_definition *definition)
  32 {
  33         struct definition_sequence *sequence_definition =
  34                 container_of(definition, struct definition_sequence, p);
  35         struct declaration_sequence *sequence_declaration =
  36                 sequence_definition->declaration;
  37         struct bt_declaration *elem = sequence_declaration->elem;
  38         struct ctf_stream_pos *pos = ctf_pos(ppos);
  39
  40         if (elem->id == CTF_TYPE_INTEGER) {
  41                 struct declaration_integer *integer_declaration =
  42                         container_of(elem, struct declaration_integer, p);
  43
  44                 if (integer_declaration->encoding == CTF_STRING_UTF8
  45                       || integer_declaration->encoding == CTF_STRING_ASCII) {
  46
  47                         if (integer_declaration->len == CHAR_BIT
  48                             && integer_declaration->p.alignment == CHAR_BIT) {
  49                                 uint64_t len = bt_sequence_len(sequence_definition);
  50
  51                                 if (!ctf_align_pos(pos, integer_declaration->p.alignment))
  52                                         return -EFAULT;
  53                                 if (!ctf_pos_access_ok(pos, len * CHAR_BIT))
  54                                         return -EFAULT;
  55
  56                                 g_string_assign(sequence_definition->string, "");
  57                                 g_string_insert_len(sequence_definition->string,
  58                                         0, (char *) ctf_get_pos_addr(pos), len);
  59                                 if (!ctf_move_pos(pos, len * CHAR_BIT))
  60                                         return -EFAULT;
  61                                 return 0;
  62                         }
  63                 }
  64         }
  65         return bt_sequence_rw(ppos, definition);
  66 }
  67
  68 int ctf_sequence_write(struct bt_stream_pos *ppos, struct bt_definition *definition)
  69 {
  70         struct definition_sequence *sequence_definition =
  71                 container_of(definition, struct definition_sequence, p);
  72         struct declaration_sequence *sequence_declaration =
  73                 sequence_definition->declaration;
  74         struct bt_declaration *elem = sequence_declaration->elem;
  75         struct ctf_stream_pos *pos = ctf_pos(ppos);
  76
  77         if (elem->id == CTF_TYPE_INTEGER) {
  78                 struct declaration_integer *integer_declaration =
  79                         container_of(elem, struct declaration_integer, p);
  80
  81                 if (integer_declaration->encoding == CTF_STRING_UTF8
  82                       || integer_declaration->encoding == CTF_STRING_ASCII) {
  83
  84                         if (integer_declaration->len == CHAR_BIT
  85                             && integer_declaration->p.alignment == CHAR_BIT) {
  86                                 uint64_t len = bt_sequence_len(sequence_definition);
  87
  88                                 if (!ctf_align_pos(pos, integer_declaration->p.alignment))
  89                                         return -EFAULT;
  90                                 if (!ctf_pos_access_ok(pos, len * CHAR_BIT))
  91                                         return -EFAULT;
  92
  93                                 memcpy((char *) ctf_get_pos_addr(pos),
  94                                         sequence_definition->string->str, len);
  95                                 if (!ctf_move_pos(pos, len * CHAR_BIT))
  96                                         return -EFAULT;
  97                                 return 0;
  98                         }
  99                 }
 100         }
 101         return bt_sequence_rw(ppos, definition);
 102 }