From 985a62d11802b44d1d1049ddd692038923da6f0b Mon Sep 17 00:00:00 2001
From: Mark Adler <madler@alumni.caltech.edu>
Date: Thu, 8 Feb 2024 17:35:23 -0800
Subject: [PATCH] Address Microsoft deprecation warnings.

---
 contrib/puff/pufftest.c |  2 +-
 examples/gznorm.c       |  2 +-
 examples/zpipe.c        |  2 +-
 gzguts.h                |  9 +++++++--
 gzlib.c                 | 17 ++++++++++-------
 test/minigzip.c         |  6 +++++-
 6 files changed, 25 insertions(+), 13 deletions(-)

diff --git a/contrib/puff/pufftest.c b/contrib/puff/pufftest.c
index 5f72ecc..328cb9f 100644
--- a/contrib/puff/pufftest.c
+++ b/contrib/puff/pufftest.c
@@ -23,7 +23,7 @@
 #if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__)
 #  include <fcntl.h>
 #  include <io.h>
-#  define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
+#  define SET_BINARY_MODE(file) _setmode(_fileno(file), O_BINARY)
 #else
 #  define SET_BINARY_MODE(file)
 #endif
diff --git a/examples/gznorm.c b/examples/gznorm.c
index 68e0a0f..2a1dda8 100644
--- a/examples/gznorm.c
+++ b/examples/gznorm.c
@@ -24,7 +24,7 @@
 #if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__)
 #  include <fcntl.h>
 #  include <io.h>
-#  define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
+#  define SET_BINARY_MODE(file) _setmode(_fileno(file), O_BINARY)
 #else
 #  define SET_BINARY_MODE(file)
 #endif
diff --git a/examples/zpipe.c b/examples/zpipe.c
index 83535d1..184fce5 100644
--- a/examples/zpipe.c
+++ b/examples/zpipe.c
@@ -20,7 +20,7 @@
 #if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__)
 #  include <fcntl.h>
 #  include <io.h>
-#  define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
+#  define SET_BINARY_MODE(file) _setmode(_fileno(file), O_BINARY)
 #else
 #  define SET_BINARY_MODE(file)
 #endif
diff --git a/gzguts.h b/gzguts.h
index 074ec84..a909e33 100644
--- a/gzguts.h
+++ b/gzguts.h
@@ -17,6 +17,10 @@
 #  define ZLIB_INTERNAL
 #endif
 
+#if defined(_WIN32) && !defined(_CRT_SECURE_NO_WARNINGS)
+#  define _CRT_SECURE_NO_WARNINGS
+#endif
+
 #include <stdio.h>
 #include "zlib.h"
 #ifdef STDC
@@ -36,13 +40,14 @@
 
 #if defined(__TURBOC__) || defined(_MSC_VER) || defined(_WIN32)
 #  include <io.h>
+#  include <sys/stat.h>
 #endif
 
-#if defined(_WIN32)
+#if defined(_WIN32) && !defined(WIDECHAR)
 #  define WIDECHAR
 #endif
 
-#ifdef WINAPI_FAMILY
+#if defined(_WIN32) || defined(WINAPI_FAMILY)
 #  define open _open
 #  define read _read
 #  define write _write
diff --git a/gzlib.c b/gzlib.c
index 983153c..05a9ae5 100644
--- a/gzlib.c
+++ b/gzlib.c
@@ -52,7 +52,8 @@ char ZLIB_INTERNAL *gz_strwinerror(DWORD error) {
             msgbuf[chars] = 0;
         }
 
-        wcstombs(buf, msgbuf, chars + 1);
+        z_size_t len;
+        wcstombs_s(&len, buf, sizeof(buf), msgbuf, chars + 1);
         LocalFree(msgbuf);
     }
     else {
@@ -180,8 +181,7 @@ local gzFile gz_open(const void *path, int fd, const char *mode) {
     /* save the path name for error messages */
 #ifdef WIDECHAR
     if (fd == -2) {
-        len = wcstombs(NULL, path, 0);
-        if (len == (z_size_t)-1)
+        if (wcstombs_s(&len, NULL, 0, path, 0) != 0)
             len = 0;
     }
     else
@@ -195,7 +195,7 @@ local gzFile gz_open(const void *path, int fd, const char *mode) {
 #ifdef WIDECHAR
     if (fd == -2)
         if (len)
-            wcstombs(state->path, path, len + 1);
+            wcstombs_s(&len, state->path, len + 1, path, len + 1);
         else
             *(state->path) = 0;
     else
@@ -228,11 +228,14 @@ local gzFile gz_open(const void *path, int fd, const char *mode) {
            O_APPEND)));
 
     /* open the file with the appropriate flags (or just use fd) */
-    state->fd = fd > -1 ? fd : (
+    if (fd == -1)
+        state->fd = open((const char *)path, oflag, 0666);
 #ifdef WIDECHAR
-        fd == -2 ? _wopen(path, oflag, 0666) :
+    else if (fd == -2)
+        _wsopen_s(&state->fd, path, oflag, _SH_DENYNO, _S_IREAD | _S_IWRITE);
 #endif
-        open((const char *)path, oflag, 0666));
+    else
+        state->fd = fd;
     if (state->fd == -1) {
         free(state->path);
         free(state);
diff --git a/test/minigzip.c b/test/minigzip.c
index aa787fc..d5173b5 100644
--- a/test/minigzip.c
+++ b/test/minigzip.c
@@ -39,7 +39,7 @@
 #  ifdef UNDER_CE
 #    include <stdlib.h>
 #  endif
-#  define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
+#  define SET_BINARY_MODE(file) _setmode(_fileno(file), O_BINARY)
 #else
 #  define SET_BINARY_MODE(file)
 #endif
@@ -58,6 +58,10 @@
 #if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
 #  include <unix.h> /* for fileno */
 #endif
+#ifdef WIN32
+#  define fileno _fileno
+#  define unlink _unlink
+#endif
 
 #if !defined(Z_HAVE_UNISTD_H) && !defined(_LARGEFILE64_SOURCE)
 #ifndef WIN32 /* unlink already in stdio.h for WIN32 */