many things, cosmo build!

Common/Std/libc.c

@@ -1,7 +1,9 @@
 #include "../std.h"
-#include "../str.h"
+#include "any.c"
 #include <assert.h>
+#include <poll.h>
 #include <stdarg.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/socket.h>
@@ -11,13 +13,7 @@
 void *com_std_alloc(void *ptr, size_t size) {
   return size != 0 ? realloc(ptr, size) : (free(ptr), NULL);
 }
-void com_std_assert(bool holds) { assert(holds); }
-void com_std_printf(char const *fmt, ...) {
-  va_list args;
-  va_start(args, fmt);
-  vprintf(fmt, args);
-  va_end(args);
-}
+
 double com_std_sqrt(double v) { return sqrt(v); }
 double com_std_fabs(double v) { return fabs(v); }
 double com_std_sin(double v) { return sin(v); }
@@ -43,6 +39,15 @@ int32_t com_std_read(com_std_fd fd, void *data, uint32_t upto) {
   return fread(data, 1, upto, fd);
 }
 
+bool com_std_has_data(com_std_fd fd) {
+  struct pollfd pfd = {.fd = (intptr_t)fd, .events = POLLIN};
+  int ret = poll(&pfd, 1, 0);
+  if (ret > 0) {
+    return pfd.revents & POLLIN;
+  } else
+    return false;
+}
+
 bool com_std_sfwd(com_std_fd fd, uint32_t bytes) {
   com_std_assert(fd != NULL && bytes != 0);
   return fseek(fd, bytes, SEEK_CUR) == 0;