From c934fe095b0ad1ef4e7557bb87fa8ed3beba78a9 Mon Sep 17 00:00:00 2001
From: niftynei <niftynei@gmail.com>
Date: Sat, 29 May 2021 13:56:03 -0500
Subject: [PATCH] libplugin: add u16_option parsing

A couple of the fields for liquidity_ads are u16
---
 plugins/libplugin.c | 19 +++++++++++++++++++
 plugins/libplugin.h |  1 +
 2 files changed, 20 insertions(+)

diff --git a/plugins/libplugin.c b/plugins/libplugin.c
index f1ef5b653..43216f335 100644
--- a/plugins/libplugin.c
+++ b/plugins/libplugin.c
@@ -925,6 +925,25 @@ char *u32_option(const char *arg, u32 *i)
 	return NULL;
 }
 
+char *u16_option(const char *arg, u16 *i)
+{
+	char *endp;
+	u64 n;
+
+	errno = 0;
+	n = strtoul(arg, &endp, 0);
+	if (*endp || !arg[0])
+		return tal_fmt(NULL, "'%s' is not a number", arg);
+	if (errno)
+		return tal_fmt(NULL, "'%s' is out of range", arg);
+
+	*i = n;
+	if (*i != n)
+		return tal_fmt(NULL, "'%s' is too large (overflow)", arg);
+
+	return NULL;
+}
+
 char *bool_option(const char *arg, bool *i)
 {
 	if (!streq(arg, "true") && !streq(arg, "false"))
diff --git a/plugins/libplugin.h b/plugins/libplugin.h
index 6ae600fd9..e480ed50d 100644
--- a/plugins/libplugin.h
+++ b/plugins/libplugin.h
@@ -277,6 +277,7 @@ void plugin_notify_progress(struct command *cmd,
 /* Standard helpers */
 char *u64_option(const char *arg, u64 *i);
 char *u32_option(const char *arg, u32 *i);
+char *u16_option(const char *arg, u16 *i);
 char *bool_option(const char *arg, bool *i);
 char *charp_option(const char *arg, char **p);
 char *flag_option(const char *arg, bool *i);