From 8ec1732af08424163ac78e11ca8aa4a03328db54 Mon Sep 17 00:00:00 2001
From: UMU <UMU618@users.noreply.github.com>
Date: Sun, 13 Feb 2022 13:57:43 +0800
Subject: [PATCH] build: fix error C4146 on MSVC (#3271)

> error C4146: unary minus operator applied to unsigned type, result still unsigned
---
 src/idna.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/idna.c b/src/idna.c
index b44cb16a..93d982ca 100644
--- a/src/idna.c
+++ b/src/idna.c
@@ -21,6 +21,7 @@
 #include "idna.h"
 #include <assert.h>
 #include <string.h>
+#include <limits.h> /* UINT_MAX */
 
 static unsigned uv__utf8_decode1_slow(const char** p,
                                       const char* pe,
@@ -129,7 +130,7 @@ static int uv__idna_toascii_label(const char* s, const char* se,
   while (s < se) {
     c = uv__utf8_decode1(&s, se);
 
-    if (c == -1u)
+    if (c == UINT_MAX)
       return UV_EINVAL;
 
     if (c < 128)
@@ -151,7 +152,7 @@ static int uv__idna_toascii_label(const char* s, const char* se,
   s = ss;
   while (s < se) {
     c = uv__utf8_decode1(&s, se);
-    assert(c != -1u);
+    assert(c != UINT_MAX);
 
     if (c > 127)
       continue;
@@ -182,7 +183,7 @@ static int uv__idna_toascii_label(const char* s, const char* se,
 
     while (s < se) {
       c = uv__utf8_decode1(&s, se);
-      assert(c != -1u);
+      assert(c != UINT_MAX);
 
       if (c >= n)
         if (c < m)
@@ -201,7 +202,7 @@ static int uv__idna_toascii_label(const char* s, const char* se,
     s = ss;
     while (s < se) {
       c = uv__utf8_decode1(&s, se);
-      assert(c != -1u);
+      assert(c != UINT_MAX);
 
       if (c < n)
         if (++delta == 0)
@@ -280,7 +281,7 @@ long uv__idna_toascii(const char* s, const char* se, char* d, char* de) {
     st = si;
     c = uv__utf8_decode1(&si, se);
 
-    if (c == -1u)
+    if (c == UINT_MAX)
       return UV_EINVAL;
 
     if (c != '.')