static void ts_subst(char *dest, size_t size, const char *string, /* {{{ */
const value_list_t *vl) {
char temp[DATA_MAX_NAME_LEN];
/* Initialize the field with the template. */
sstrncpy(dest, string, size);
if (strchr(dest, '%') == NULL)
return;
#define REPLACE_FIELD(t, v) \
if (subst_string(temp, sizeof(temp), dest, t, v) != NULL) \
sstrncpy(dest, temp, size);
REPLACE_FIELD("%{host}", vl->host);
REPLACE_FIELD("%{plugin}", vl->plugin);
REPLACE_FIELD("%{plugin_instance}", vl->plugin_instance);
REPLACE_FIELD("%{type}", vl->type);
REPLACE_FIELD("%{type_instance}", vl->type_instance);
if (vl->meta != NULL) {
char **meta_toc = NULL;
int meta_entries = meta_data_toc(vl->meta, &meta_toc);
if (meta_entries <= 0)
return;
for (int i = 0; i < meta_entries; i++) {
char meta_name[DATA_MAX_NAME_LEN];
char *value_str;
const char *key = meta_toc[i];
ssnprintf(meta_name, sizeof(meta_name), "%%{meta:%s}", key);
if (meta_data_as_string(vl->meta, key, &value_str) != 0)
continue;
REPLACE_FIELD(meta_name, value_str);
sfree(value_str);
}
strarray_free(meta_toc, (size_t)meta_entries);
}
} /* }}} int ts_subst */
static int meta_data_to_json(char *buffer, size_t buffer_size, /* {{{ */
meta_data_t *meta) {
char **keys = NULL;
size_t keys_num;
int status;
if ((buffer == NULL) || (buffer_size == 0) || (meta == NULL))
return (EINVAL);
status = meta_data_toc(meta, &keys);
if (status <= 0)
return (status);
keys_num = (size_t)status;
status = meta_data_keys_to_json(buffer, buffer_size, meta, keys, keys_num);
for (size_t i = 0; i < keys_num; ++i)
sfree(keys[i]);
sfree(keys);
return status;
} /* }}} int meta_data_to_json */
static int meta_data_to_json (char *buffer, size_t buffer_size, /* {{{ */
meta_data_t *meta)
{
size_t offset = 0;
char **keys = NULL;
int keys_num;
int status;
int i;
buffer[0] = 0;
if (meta == NULL)
return (EINVAL);
#define BUFFER_ADD(...) do { \
status = ssnprintf (buffer + offset, buffer_size - offset, \
__VA_ARGS__); \
if (status < 1) \
return (-1); \
else if (((size_t) status) >= (buffer_size - offset)) \
return (-ENOMEM); \
else \
offset += ((size_t) status); \
} while (0)
keys_num = meta_data_toc (meta, &keys);
if (keys_num == 0)
{
sfree (keys);
return (0);
}
for (i = 0; i < keys_num; ++i)
{
int type;
char *key = keys[i];
type = meta_data_type (meta, key);
if (type == MD_TYPE_STRING)
{
char *value = NULL;
if (meta_data_get_string (meta, key, &value) == 0)
{
char temp[512] = "";
escape_string (temp, sizeof (temp), value);
sfree (value);
BUFFER_ADD (",\"%s\":%s", key, temp);
}
}
else if (type == MD_TYPE_SIGNED_INT)
{
int64_t value = 0;
if (meta_data_get_signed_int (meta, key, &value) == 0)
BUFFER_ADD (",\"%s\":%"PRIi64, key, value);
}
else if (type == MD_TYPE_UNSIGNED_INT)
{
uint64_t value = 0;
if (meta_data_get_unsigned_int (meta, key, &value) == 0)
BUFFER_ADD (",\"%s\":%"PRIu64, key, value);
}
else if (type == MD_TYPE_DOUBLE)
{
double value = 0.0;
if (meta_data_get_double (meta, key, &value) == 0)
BUFFER_ADD (",\"%s\":%f", key, value);
}
else if (type == MD_TYPE_BOOLEAN)
{
_Bool value = 0;
if (meta_data_get_boolean (meta, key, &value) == 0)
BUFFER_ADD (",\"%s\":%s", key, value ? "true" : "false");
}
free (key);
} /* for (keys) */
free (keys);
if (offset <= 0)
return (ENOENT);
buffer[0] = '{'; /* replace leading ',' */
BUFFER_ADD ("}");
#undef BUFFER_ADD
return (0);
} /* }}} int meta_data_to_json */
