zfl_config_t *
zfl_config_load (char *filename)
{
// Open file as specified and make sure we can read it
FILE *file;
if (streq (filename, "-"))
file = stdin; // "-" means read from stdin
else {
file = fopen (filename, "r");
if (!file)
return NULL; // File missing or not readable
}
// Load file data into a memory blob
zfl_blob_t *blob = zfl_blob_new (NULL, 0);
assert (blob);
assert (zfl_blob_load (blob, file));
fclose (file);
// Autodetect whether it's JSON or ZPL text
char *data = (char *) zfl_blob_data (blob);
while (isspace (*data))
data++;
zfl_config_t *self;
if (*data == '{')
self = zfl_config_json ((char *) zfl_blob_data (blob));
else
self = zfl_config_zpl ((char *) zfl_blob_data (blob));
zfl_blob_destroy (&blob);
return self;
}
// --------------------------------------------------------------------------
// Selftest
//
int
zfl_blob_test (Bool verbose)
{
zfl_blob_t
*blob;
char
*string = "This is a string";
FILE
*file;
printf (" * zfl_blob: ");
blob = zfl_blob_new (NULL, 0);
assert (blob);
assert (zfl_blob_size (blob) == 0);
file = fopen ("zfl_blob.c", "r");
assert (file);
assert (zfl_blob_load (blob, file));
fclose (file);
assert (zfl_blob_size (blob) > 0);
zfl_blob_set_data (blob, string, strlen (string));
assert (zfl_blob_size (blob) == strlen (string));
assert (streq ((char *) (zfl_blob_data (blob)), string));
zfl_blob_destroy (&blob);
assert (blob == NULL);
printf ("OK\n");
return 0;
}
// Starts a device as configured by a full ZDCF config file
//
static void
s_start_configured_device (char *filename)
{
FILE *file; // JSON config file stream
if (streq (filename, "-"))
file = stdin; // "-" means read from stdin
else {
file = fopen (filename, "rb");
if (!file) {
printf ("E: '%s' doesn't exist or can't be read\n", filename);
exit (EXIT_FAILURE);
}
}
// Load config data into blob
zfl_blob_t *blob = zfl_blob_new ();
assert (blob);
zfl_blob_load (blob, file);
fclose (file);
// Create a new config from the blob data
zfl_config_t *config = zfl_config_new (zfl_blob_data (blob));
assert (config);
// Find first device
char *device = zfl_config_device (config, 0);
if (!*device) {
printf ("E: No device specified, please read http://rfc.zeromq.org/spec:3\n");
exit (EXIT_FAILURE);
}
// Process device type
char *type = zfl_config_device_type (config, device);
int device_type; // 0MQ defined type
int frontend_type; // Socket types depending
int backend_type; // on the device type
s_parse_device_type (type, &device_type, &frontend_type, &backend_type);
// Create and configure sockets
void *frontend = zfl_config_socket (config, device, "frontend", frontend_type);
assert (frontend);
void *backend = zfl_config_socket (config, device, "backend", backend_type);
assert (backend);
// Start the device now
if (zfl_config_verbose (config))
printf ("I: Starting device...\n");
// Will not actually ever return
zmq_device (device_type, frontend, backend);
zfl_config_destroy (&config);
}