From: Yann Collet <cyan@fb.com>
Date: Thu, 24 Oct 2019 22:19:05 +0000 (-0700)
Subject: fix zlibWrapper for Visual Studio
X-Git-Tag: v1.4.4~1^2~11^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=42a22af78b068bd934123ae7e1d6eee1544282f6;p=thirdparty%2Fzstd.git

fix zlibWrapper for Visual Studio

As per https://github.com/facebook/zstd/issues/1800#issuecomment-545945050,
Visual does not support `ssize_t` type,
which is an issue for `gzread.c`.

Added a work around, suggested by @bluenlive

Note : I have not been able to confirm the problem,
so this is a blind fix.
This seems safe outside of Visual, since it is gated by _MSC_VER macro.
---

diff --git a/zlibWrapper/gzread.c b/zlibWrapper/gzread.c
index bcac9700d..359d17889 100644
--- a/zlibWrapper/gzread.c
+++ b/zlibWrapper/gzread.c
@@ -8,6 +8,14 @@
 
 #include "gzguts.h"
 
+/* fix for Visual Studio, which doesn't support ssize_t type.
+ * see https://github.com/facebook/zstd/issues/1800#issuecomment-545945050 */
+#if defined(_MSC_VER) && !defined(ssize_t)
+#  include <BaseTsd.h>
+   typedef SSIZE_T ssize_t;
+#endif
+
+
 /* Local functions */
 local int gz_load OF((gz_statep, unsigned char *, unsigned, unsigned *));
 local int gz_avail OF((gz_statep));