From 01253ecd7e0a01d311670f2d03c61b82fc12d338 Mon Sep 17 00:00:00 2001
From: Milan Bulat <milan@peer.inc>
Date: Mon, 9 Oct 2023 17:04:51 +0400
Subject: [PATCH] Make the existence of gz_intmax() unconditional.

gz_intmax() is noted in zlib.map. This assures it's always there.
---
 gzguts.h |  6 +-----
 gzlib.c  | 10 +++++-----
 2 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/gzguts.h b/gzguts.h
index f937504..adc2b34 100644
--- a/gzguts.h
+++ b/gzguts.h
@@ -210,9 +210,5 @@ char ZLIB_INTERNAL *gz_strwinerror(DWORD error);
 /* 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(void);
-#  define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())
-#endif
+#define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())
diff --git a/gzlib.c b/gzlib.c
index 29fc448..9c103db 100644
--- a/gzlib.c
+++ b/gzlib.c
@@ -563,20 +563,20 @@ void ZLIB_INTERNAL gz_error(gz_statep state, int err, const char *msg) {
 #endif
 }
 
-#ifndef INT_MAX
 /* portably return maximum value for an int (when limits.h presumed not
    available) -- we need to do this to cover cases where 2's complement not
    used, since C standard permits 1's complement and sign-bit representations,
    otherwise we could just use ((unsigned)-1) >> 1 */
 unsigned ZLIB_INTERNAL gz_intmax(void) {
-    unsigned p, q;
-
-    p = 1;
+#ifdef INT_MAX
+    return INT_MAX;
+#else
+    unsigned p = 1, q;
     do {
         q = p;
         p <<= 1;
         p++;
     } while (p > q);
     return q >> 1;
-}
 #endif
+}