int value_list_to_json (char *buffer, size_t buffer_size, /* {{{ */
const data_set_t *ds, const value_list_t *vl, int store_rates)
{
char temp[512];
size_t offset = 0;
int status;
memset (buffer, 0, buffer_size);
#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)
BUFFER_ADD ("{");
status = values_to_json (temp, sizeof (temp), ds, vl, store_rates);
if (status != 0)
return (status);
BUFFER_ADD ("\"values\":%s", temp);
status = dstypes_to_json (temp, sizeof (temp), ds, vl);
if (status != 0)
return (status);
BUFFER_ADD (",\"dstypes\":%s", temp);
status = dsnames_to_json (temp, sizeof (temp), ds, vl);
if (status != 0)
return (status);
BUFFER_ADD (",\"dsnames\":%s", temp);
BUFFER_ADD (",\"time\":%lu", (unsigned long) vl->time);
BUFFER_ADD (",\"interval\":%i", vl->interval);
#define BUFFER_ADD_KEYVAL(key, value) do { \
status = escape_string (temp, sizeof (temp), (value)); \
if (status != 0) \
return (status); \
BUFFER_ADD (",\"%s\":%s", (key), temp); \
} while (0)
BUFFER_ADD_KEYVAL ("host", vl->host);
BUFFER_ADD_KEYVAL ("plugin", vl->plugin);
BUFFER_ADD_KEYVAL ("plugin_instance", vl->plugin_instance);
BUFFER_ADD_KEYVAL ("type", vl->type);
BUFFER_ADD_KEYVAL ("type_instance", vl->type_instance);
BUFFER_ADD ("}");
#undef BUFFER_ADD_KEYVAL
#undef BUFFER_ADD
DEBUG ("format_json: value_list_to_json: buffer = %s;", buffer);
return (0);
} /* }}} int value_list_to_json */
static int value_list_to_json(char *buffer, size_t buffer_size, /* {{{ */
const data_set_t *ds, const value_list_t *vl,
int store_rates) {
char temp[512];
size_t offset = 0;
int status;
memset(buffer, 0, buffer_size);
#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)
/* All value lists have a leading comma. The first one will be replaced with
* a square bracket in `format_json_finalize'. */
BUFFER_ADD(",{");
status = values_to_json(temp, sizeof(temp), ds, vl, store_rates);
if (status != 0)
return (status);
BUFFER_ADD("\"values\":%s", temp);
status = dstypes_to_json(temp, sizeof(temp), ds);
if (status != 0)
return (status);
BUFFER_ADD(",\"dstypes\":%s", temp);
status = dsnames_to_json(temp, sizeof(temp), ds);
if (status != 0)
return (status);
BUFFER_ADD(",\"dsnames\":%s", temp);
BUFFER_ADD(",\"time\":%.3f", CDTIME_T_TO_DOUBLE(vl->time));
BUFFER_ADD(",\"interval\":%.3f", CDTIME_T_TO_DOUBLE(vl->interval));
#define BUFFER_ADD_KEYVAL(key, value) \
do { \
status = json_escape_string(temp, sizeof(temp), (value)); \
if (status != 0) \
return (status); \
BUFFER_ADD(",\"%s\":%s", (key), temp); \
} while (0)
BUFFER_ADD_KEYVAL("host", vl->host);
BUFFER_ADD_KEYVAL("plugin", vl->plugin);
BUFFER_ADD_KEYVAL("plugin_instance", vl->plugin_instance);
BUFFER_ADD_KEYVAL("type", vl->type);
BUFFER_ADD_KEYVAL("type_instance", vl->type_instance);
if (vl->meta != NULL) {
char meta_buffer[buffer_size];
memset(meta_buffer, 0, sizeof(meta_buffer));
status = meta_data_to_json(meta_buffer, sizeof(meta_buffer), vl->meta);
if (status != 0)
return (status);
BUFFER_ADD(",\"meta\":%s", meta_buffer);
} /* if (vl->meta != NULL) */
BUFFER_ADD("}");
#undef BUFFER_ADD_KEYVAL
#undef BUFFER_ADD
DEBUG("format_json: value_list_to_json: buffer = %s;", buffer);
return (0);
} /* }}} int value_list_to_json */
