TB print hello world

user/tb/runtime.c

@@ -0,0 +1,34 @@
+#include <stddef.h>
+#include <stdbool.h>
+#include <linklist.h>
+#include <dlmalloc/malloc.h>
+#include <uprintf.h>
+#include "runtime.h"
+#include "interp.h"
+
+RtCmd *RTCMDS = NULL;
+
+#define RTCMD(name) \
+  do { \
+    RtCmd *_cmd = dlmalloc(sizeof(*_cmd)); \
+    _cmd->cmdname = #name; \
+    _cmd->fn = rt_##name; \
+    LL_APPEND(RTCMDS, _cmd); \
+  } while(0)
+
+bool rt_print(Token *tks) {
+  Token *tk = tks;
+  while (tk) {
+    uprintf("%.*s", (int)tk->len, tk->ptr);
+    if (tk->next != NULL) {
+      uprintf(" ");
+    }
+    tk = tk->next;
+  }
+
+  return true;
+}
+
+void rt_init(void) {
+  RTCMD(print);
+}