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_copy(struct stream_pos *pdest, struct stream_pos *psrc,
  24                      const struct declaration_string *string_declaration)
  25 {
  26         struct ctf_stream_pos *dest = ctf_pos(pdest);
  27         struct ctf_stream_pos *src = ctf_pos(psrc);
  28         size_t len;
  29         char *destaddr, *srcaddr;
  30
  31         ctf_align_pos(src, string_declaration->p.alignment);
  32         srcaddr = ctf_get_pos_addr(src);
  33         len = strlen(srcaddr) + 1;
  34         if (dest->dummy)
  35                 goto end;
  36         ctf_align_pos(dest, string_declaration->p.alignment);
  37         destaddr = ctf_get_pos_addr(dest);
  38         strcpy(destaddr, srcaddr);
  39 end:
  40         ctf_move_pos(dest, len);
  41         ctf_move_pos(src, len);
  42 }
  43
  44 void ctf_string_read(struct stream_pos *ppos, struct definition *definition)
  45 {
  46         struct definition_string *string_definition =
  47                 container_of(definition, struct definition_string, p);
  48         const struct declaration_string *string_declaration =
  49                 string_definition->declaration;
  50         struct ctf_stream_pos *pos = ctf_pos(ppos);
  51         size_t len;
  52         char *srcaddr;
  53
  54         ctf_align_pos(pos, string_declaration->p.alignment);
  55         srcaddr = ctf_get_pos_addr(pos);
  56         len = strlen(srcaddr) + 1;
  57         if (string_definition->alloc_len < len) {
  58                 string_definition->value =
  59                         g_realloc(string_definition->value, len);
  60                 string_definition->alloc_len = len;
  61         }
  62         memcpy(string_definition->value, srcaddr, len);
  63         string_definition->len = len;
  64         ctf_move_pos(pos, len);
  65 }
  66
  67 void ctf_string_write(struct stream_pos *ppos,
  68                       struct definition *definition)
  69 {
  70         struct definition_string *string_definition =
  71                 container_of(definition, struct definition_string, p);
  72         const struct declaration_string *string_declaration =
  73                 string_definition->declaration;
  74         struct ctf_stream_pos *pos = ctf_pos(ppos);
  75         size_t len;
  76         char *destaddr;
  77
  78         ctf_align_pos(pos, string_declaration->p.alignment);
  79         assert(string_definition->value != NULL);
  80         len = string_definition->len;
  81         if (pos->dummy)
  82                 goto end;
  83         destaddr = ctf_get_pos_addr(pos);
  84         strcpy(destaddr, string_definition->value);
  85 end:
  86         ctf_move_pos(pos, len);
  87 }