diff --git a/aos/print_field_helpers.h b/aos/print_field_helpers.h
new file mode 100644
index 0000000..933ce46
--- /dev/null
+++ b/aos/print_field_helpers.h
@@ -0,0 +1,41 @@
+#ifndef AOS_PRINT_FIELD_HELPERS_H_
+#define AOS_PRINT_FIELD_HELPERS_H_
+
+#include <stdint.h>
+
+#include <type_traits>
+
+namespace aos {
+
+template<typename T>
+inline bool PrintInteger(char *buf, T val, size_t *output) {
+  static const bool is_signed = ::std::is_signed<T>::value;
+  const bool is_negative =
+      is_signed ? (val & (static_cast<T>(1) << (sizeof(T) * 8 - 1))) : false;
+
+  size_t len = 0;
+  if (is_negative) {
+    do {
+      if (len == *output) return false;
+      buf[len++] = '0' - (val % 10);
+      val /= 10;
+    } while (val != 0);
+    if (len == *output) return false;
+    buf[len++] = '-';
+  } else {
+    do {
+      if (len == *output) return false;
+      buf[len++] = '0' + (val % 10);
+      val /= 10;
+    } while (val != 0);
+  }
+  for (size_t i = 0; i < (len >> 1); i++) {
+    std::swap(buf[len - 1 - i], buf[i]);
+  }
+  *output -= len;
+  return true;
+}
+
+}  // namespace aos
+
+#endif  // AOS_PRINT_FIELD_HELPERS_H_