zlib: sync with upstream

diff --git a/lib/libz/gzguts.h b/lib/libz/gzguts.h
index 074ec84..a909e33 100644 (file)
--- a/lib/libz/gzguts.h
+++ b/lib/libz/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/lib/libz/gzlib.c b/lib/libz/gzlib.c
index 983153c..05a9ae5 100644 (file)
--- a/lib/libz/gzlib.c
+++ b/lib/libz/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);