Function json_normalize

strings/json_normalize.c:997–1067

int
json_normalize(DYNAMIC_STRING *result,
               const char *s, size_t size, CHARSET_INFO *cs,
               MEM_ROOT *current_mem_root,
               json_engine_t *temp_je,
               MEM_ROOT_DYNAMIC_ARRAY *stack)
{
  int err= 0;
  uint convert_err= 0;
  struct json_norm_value root;
  char *s_utf8= NULL;
  size_t in_size;
  const char *in;

  DBUG_ASSERT(result);

  memset(&root, 0x00, sizeof(root));
  root.type = JSON_VALUE_UNINITIALIZED;

  /*
     Convert the incoming string to utf8mb4_bin before doing any other work.
     According to JSON RFC 8259, between systems JSON must be UTF-8
     https://datatracker.ietf.org/doc/html/rfc8259#section-8.1
  */
  if (cs == &my_charset_utf8mb4_bin)
  {
    in= s;
    in_size= size;
  }
  else
  {
    in_size= (size * my_charset_utf8mb4_bin.mbmaxlen) + 1;
    s_utf8= json_norm_malloc(in_size);
    if (!s_utf8)
      return 1;
    memset(s_utf8, 0x00, in_size);
    my_convert(s_utf8, (uint32)in_size, &my_charset_utf8mb4_bin,
               s, (uint32)size, cs, &convert_err);
    if (convert_err)
    {
       my_free(s_utf8);
       return 1;
    }
    in= s_utf8;
    in_size= strlen(s_utf8);
  }


  if ((json_valid(in, in_size, &my_charset_utf8mb4_bin, temp_je) == 0))
  {
    err= 1;
    goto json_normalize_end;
  }

  err= json_norm_build(&root, in, in_size,
                    &my_charset_utf8mb4_bin, current_mem_root, temp_je, stack);
  if (err)
    goto json_normalize_end;