--- a/zlib/gzguts.h	Sun Jun 15 15:39:16 2025 -0700
+++ b/zlib/gzguts.h	Sun Jun 15 15:39:33 2025 -0700
@@ -1,5 +1,5 @@
 /* gzguts.h -- zlib internal header definitions for gz* operations
- * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013, 2016 Mark Adler
+ * Copyright (C) 2004-2024 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -7,9 +7,8 @@
 #  ifndef _LARGEFILE_SOURCE
 #    define _LARGEFILE_SOURCE 1
 #  endif
-#  ifdef _FILE_OFFSET_BITS
-#    undef _FILE_OFFSET_BITS
-#  endif
+#  undef _FILE_OFFSET_BITS
+#  undef _TIME_BITS
 #endif
 
 #ifdef HAVE_HIDDEN
@@ -39,7 +38,7 @@
 #  include <io.h>
 #endif
 
-#if defined(_WIN32) || defined(__CYGWIN__)
+#if defined(_WIN32)
 #  define WIDECHAR
 #endif
 
@@ -119,8 +118,8 @@
 
 /* gz* functions always use library allocation functions */
 #ifndef STDC
-  extern voidp  malloc OF((uInt size));
-  extern void   free   OF((voidpf ptr));
+  extern voidp  malloc(uInt size);
+  extern void   free(voidpf ptr);
 #endif
 
 /* get errno and strerror definition */
@@ -138,10 +137,10 @@
 
 /* provide prototypes for these when building zlib without LFS */
 #if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0
-    ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
-    ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int));
-    ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile));
-    ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile));
+    ZEXTERN gzFile ZEXPORT gzopen64(const char *, const char *);
+    ZEXTERN z_off64_t ZEXPORT gzseek64(gzFile, z_off64_t, int);
+    ZEXTERN z_off64_t ZEXPORT gztell64(gzFile);
+    ZEXTERN z_off64_t ZEXPORT gzoffset64(gzFile);
 #endif
 
 /* default memLevel */
@@ -190,6 +189,7 @@
         /* just for writing */
     int level;              /* compression level */
     int strategy;           /* compression strategy */
+    int reset;              /* true if a reset is pending after a Z_FINISH */
         /* seek request */
     z_off64_t skip;         /* amount to skip (already rewound if backwards) */
     int seek;               /* true if seek request pending */
@@ -202,17 +202,13 @@
 typedef gz_state FAR *gz_statep;
 
 /* shared functions */
-void ZLIB_INTERNAL gz_error OF((gz_statep, int, const char *));
+void ZLIB_INTERNAL gz_error(gz_statep, int, const char *);
 #if defined UNDER_CE
-char ZLIB_INTERNAL *gz_strwinerror OF((DWORD error));
+char ZLIB_INTERNAL *gz_strwinerror(DWORD error);
 #endif
 
 /* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t
    value -- needed when comparing unsigned to z_off64_t, which is signed
    (possible z_off64_t types off_t, off64_t, and long are all signed) */
-#ifdef INT_MAX
-#  define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX)
-#else
-unsigned ZLIB_INTERNAL gz_intmax OF((void));
-#  define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())
-#endif
+unsigned ZLIB_INTERNAL gz_intmax(void);
+#define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())