formats/ctf/types/string.c

   1 /*
   2  * Common Trace Format
   3  *
   4  * Strings read/write functions.
   5  *
   6  * Copyright 2010 - 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/ctf/types.h>
  20 #include <limits.h>             /* C99 limits */
  21 #include <string.h>
  22
  23 void ctf_string_read(struct stream_pos *ppos, struct definition *definition)
  24 {
  25         struct definition_string *string_definition =
  26                 container_of(definition, struct definition_string, p);
  27         const struct declaration_string *string_declaration =
  28                 string_definition->declaration;
  29         struct ctf_stream_pos *pos = ctf_pos(ppos);
  30         size_t len;
  31         char *srcaddr;
  32
  33         ctf_align_pos(pos, string_declaration->p.alignment);
  34         srcaddr = ctf_get_pos_addr(pos);
  35         len = strlen(srcaddr) + 1;
  36         if (string_definition->alloc_len < len) {
  37                 string_definition->value =
  38                         g_realloc(string_definition->value, len);
  39                 string_definition->alloc_len = len;
  40         }
  41         memcpy(string_definition->value, srcaddr, len);
  42         string_definition->len = len;
  43         ctf_move_pos(pos, len);
  44 }
  45
  46 void ctf_string_write(struct stream_pos *ppos,
  47                       struct definition *definition)
  48 {
  49         struct definition_string *string_definition =
  50                 container_of(definition, struct definition_string, p);
  51         const struct declaration_string *string_declaration =
  52                 string_definition->declaration;
  53         struct ctf_stream_pos *pos = ctf_pos(ppos);
  54         size_t len;
  55         char *destaddr;
  56
  57         ctf_align_pos(pos, string_declaration->p.alignment);
  58         assert(string_definition->value != NULL);
  59         len = string_definition->len;
  60         if (pos->dummy)
  61                 goto end;
  62         destaddr = ctf_get_pos_addr(pos);
  63         memcpy(destaddr, string_definition->value, len);
  64 end:
  65         ctf_move_pos(pos, len);
  66 }