int exec_sql(MYSQL *conn, char *line)
{
if (strncasecmp(line, "select ", sizeof("select ") - 1) == 0) {
exec_select(conn, line);
} else {
exec_query(conn, line);
/*
} else if (strncasecmp(line, "insert ", sizeof("insert ") - 1) == 0) {
} else if (strncasecmp(line, "update ", sizeof("update ") - 1) == 0) {
} else if (strncasecmp(line, "delete ", sizeof("delete ") - 1) == 0) {
*/
}
return 0;
}
/**
* Execute a parse tree and return the result set or runtime error
*
* @param dcb The DCB that connects to the client
* @param tree The parse tree for the query
*/
void
maxinfo_execute(DCB *dcb, MAXINFO_TREE *tree)
{
switch (tree->op)
{
case MAXOP_SHOW:
exec_show(dcb, tree);
break;
case MAXOP_SELECT:
exec_select(dcb, tree);
break;
case MAXOP_FLUSH:
exec_flush(dcb, tree);
break;
case MAXOP_SET:
exec_set(dcb, tree);
break;
case MAXOP_CLEAR:
exec_clear(dcb, tree);
break;
case MAXOP_SHUTDOWN:
exec_shutdown(dcb, tree);
break;
case MAXOP_RESTART:
exec_restart(dcb, tree);
break;
case MAXOP_TABLE:
case MAXOP_COLUMNS:
case MAXOP_LITERAL:
case MAXOP_PREDICATE:
case MAXOP_LIKE:
case MAXOP_EQUAL:
default:
maxinfo_send_error(dcb, 0, "Unexpected operator in parse tree");
}
}
void exec_loop()
{
uint8_t state = 0;
bool prevConnected = false;
bool connected;
exec_select();
while(1)
{
connected = g_chirpUsb->connected();
exec_periodic();
switch (state)
{
case 0: // setup state
led_set(0); // turn off any stray led
if ((*g_progTable[g_program]->setup)()<0)
state = 3; // stop state
else
state = 1; // loop state
break;
case 1: // loop state
if (g_override)
{
// need to stop M0 because it's using the same memory and can possibly interfere.
// For example if we try to grab a raw frame while M0 is running (gathering RLS values)
// M0 could overwrite the frame memory with RLS scratch data.
exec_stopM0();
state = 2; // override state
}
else if (!g_run || (*g_progTable[g_program]->loop)()<0)
state = 3; // stop state
else if (prevConnected && !connected) // if we disconnect from pixymon, revert back to default program
{
exec_runprog(0); // run default program
state = 0; // setup state
}
break;
case 2: // override state
if (!g_override)
state = 0; // back to setup state
break;
case 3: // stop state
// set variable to indicate we've stopped
g_run = false;
g_running = false;
// stop M0
exec_stopM0();
state = 4; // wait for run state
break;
case 4: // wait for run state
if (g_run)
{
exec_run();
state = 0; // back to setup state
}
else if (!connected || !USB_Configuration) // if we disconnect from pixy or unplug cable, revert back to default program
{
exec_runprog(0); // run default program
state = 0; // back to setup state
}
break;
default:
state = 3; // stop state
}
prevConnected = connected;
}
}
