1 files changed, 13 insertions, 0 deletions
diff --git a/src/user/knob/format.c b/src/user/knob/format.c
new file mode 100644
index 0000000..f55e857
--- /dev/null
+++ b/src/user/knob/format.c
@@ -0,0 +1,13 @@
+#include <stdbool.h>
+#include <stdint.h>
+
+bool try_sntoi(const char *s, uint32_t n, uint32_t *out) {
+  uint32_t calc = 0;
+  for (uint32_t i = 0; i < n; ++i) {
+    if ((s[i] < '0') || (s[i] > '9'))
+      return false;
+    calc = calc * 10 + s[i] - '0';
+  }
+  *out = calc;
+  return true;
+}
+\ No newline at end of file