From cfbe68e46877cb0ff3f3da775b709c48513565c8 Mon Sep 17 00:00:00 2001
From: Chun-wei Fan <fanchunwei@src.gnome.org>
Date: Tue, 22 Nov 2022 15:20:53 +0800
Subject: [PATCH] sources: Silence C4013 warnings on Visual Studio

The read(), close(), open(), lseek() functions are found in io.h on Visual
Studio, which does not ship unistd.h, so include io.h on Windows if unistd.h
is not found.

C4013 (aka implicit declaration of ...) warnings can often ring alarm bells.
---
 catalog.c  | 2 ++
 nanoftp.c  | 2 ++
 nanohttp.c | 2 ++
 xzlib.c    | 2 ++
 4 files changed, 8 insertions(+)

diff --git a/catalog.c b/catalog.c
index 880f9100..bea1418d 100644
--- a/catalog.c
+++ b/catalog.c
@@ -23,6 +23,8 @@
 #endif
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#elif defined (_WIN32)
+#include <io.h>
 #endif
 #ifdef HAVE_FCNTL_H
 #include <fcntl.h>
diff --git a/nanoftp.c b/nanoftp.c
index b52f9b64..2bfba853 100644
--- a/nanoftp.c
+++ b/nanoftp.c
@@ -23,6 +23,8 @@
 
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#elif defined (_WIN32)
+#include <io.h>
 #endif
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
diff --git a/nanohttp.c b/nanohttp.c
index d9619fdb..e014fe48 100644
--- a/nanohttp.c
+++ b/nanohttp.c
@@ -22,6 +22,8 @@
 
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#elif defined (_WIN32)
+#include <io.h>
 #endif
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
diff --git a/xzlib.c b/xzlib.c
index a07b3c88..33c27a26 100644
--- a/xzlib.c
+++ b/xzlib.c
@@ -22,6 +22,8 @@
 #endif
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#elif defined (_WIN32)
+#include <io.h>
 #endif
 #ifdef LIBXML_ZLIB_ENABLED
 #include <zlib.h>