Attempt at supporting zlib on windows

Author: vxgmichel

patches/unzip_windows.patch

@@ -0,0 +1,33 @@
+diff --git a/libgambatte/src/file/unzip/crypt.h b/libgambatte/src/file/unzip/crypt.h
+index 7d8597c2..fa890c1b 100644
+--- a/libgambatte/src/file/unzip/crypt.h
++++ b/libgambatte/src/file/unzip/crypt.h
+@@ -27,6 +27,12 @@
+    Encryption is not supported.
+ */
+ 
++#ifdef _MSC_VER
++#ifndef __attribute__
++#define __attribute__(x)
++#endif
++#endif
++
+ #define CRC32(c, b) ((*(pcrc_32_tab+(((int)(c) ^ (b)) & 0xff))) ^ ((c) >> 8))
+ 
+ /***********************************************************************
+diff --git a/libgambatte/src/file/unzip/ioapi.c b/libgambatte/src/file/unzip/ioapi.c
+index 84795e34..9489ad5f 100644
+--- a/libgambatte/src/file/unzip/ioapi.c
++++ b/libgambatte/src/file/unzip/ioapi.c
+@@ -13,6 +13,11 @@
+ #include <zlib.h>
+ #include "ioapi.h"
+ 
++#ifdef _MSC_VER
++#ifndef __attribute__
++#define __attribute__(x)
++#endif
++#endif
+ 
+ 
+ /* I've found an old Unix (a SunOS 4.1.3_U1) without all SEEK_* defined.... */

pyproject.toml

@@ -67,10 +67,14 @@ module = [
 ignore_missing_imports = true
 
 [tool.cibuildwheel]
-skip = ["cp3??t-*", "cp*-musllinux_*"]
+skip = ["cp3??t-*", "cp*-musllinux_*", "*-win32"]
 
 [tool.cibuildwheel.windows]
-before-all = "git -C gambatte-core apply ../patches/statesaver_windows.patch"
+before-all = [
+    "git -C gambatte-core apply ../patches/statesaver_windows.patch ../patches/unzip_windows.patch",
+    "vcpkg install zlib:x64-windows-static-md",
+]
+environment = { CL = "/I C:/vcpkg/installed/x64-windows-static-md/include", LINK = "/LIBPATH:C:/vcpkg/installed/x64-windows-static-md/lib" }
 test-command = "gambaterm --help"
 
 [tool.cibuildwheel.macos]

setup.py

@@ -4,9 +4,6 @@
 import platform
 from setuptools import Extension, setup
 
-# No ZIP support for windows, building with zlib is a pain
-ZIP_SUPPORT = platform.system() != "Windows"
-
 
 def get_extensions() -> list[Extension]:
     import numpy  # Lazy import; numpy provided via build-system requires
@@ -16,19 +13,21 @@ def get_extensions() -> list[Extension]:
     libgambatte_sources = [
         p
         for p in glob.glob("gambatte-core/libgambatte/src/**/*.cpp", recursive=True)
-        if (ZIP_SUPPORT and not p.endswith("file.cpp"))
-        or (not ZIP_SUPPORT and not p.endswith("file_zip.cpp"))
+        if not p.endswith(
+            "file.cpp"
+        )  # Exclude file.cpp because file_zip.cpp is included
     ]
 
     # Add unzip C sources for ZIP support
-    if ZIP_SUPPORT:
-        libgambatte_sources += glob.glob(
-            "gambatte-core/libgambatte/src/file/unzip/*.c", recursive=True
-        )
+    libgambatte_sources += glob.glob(
+        "gambatte-core/libgambatte/src/file/unzip/*.c", recursive=True
+    )
 
     # Add zlib library for ZIP support
     libraries = []
-    if ZIP_SUPPORT:
+    if platform.system() == "Windows":
+        libraries += ["zlib"]
+    else:
         libraries += ["z"]
 
     libgambatte_include_dirs = [