Improve Windows support

Will now compile out of the box on Windows MSVC.
Right now, out of the box game installation is not supported
as per unshield being non-functional on Windows, will be porting
to Windows or finding a workaround in the near future.

CMakeLists.txt

@@ -1,6 +1,51 @@
 project(libxiv)
 
-find_package(fmt)
+find_package(fmt QUIET)
+
+if(TARGET fmt::fmt)
+    message("Using system library for fmt")
+
+    set(LIBRARIES fmt::fmt ${LIBRARIES})
+else()
+    message("Using built-in fmt")
+
+    FetchContent_Declare(
+    fmt
+    GIT_REPOSITORY https://github.com/fmtlib/fmt
+    GIT_TAG        master
+    )
+
+    FetchContent_MakeAvailable(fmt)
+
+    set(LIBRARIES fmt::fmt ${LIBRARIES})
+endif()
+
+# note: unshield does not work on windows per maintainer notice in README, so we might as well not even attempt to look
+# for it.
+if(NOT WIN32)
+    set(LIBRARIES unshield ${LIBRARIES})
+endif()
+
+find_package(ZLIB QUIET)
+
+if(TARGET ZLIB::ZLIB)
+    message("Using system library for zlib")
+
+    set(LIBRARIES ZLIB::ZLIB ${LIBRARIES})
+else()
+    message("Using built-in zlib")
+
+    FetchContent_Declare(
+            zlib
+            GIT_REPOSITORY https://github.com/madler/zlib.git
+            GIT_TAG        master
+    )
+
+    FetchContent_MakeAvailable(zlib)
+
+    set(LIBRARIES zlib ${LIBRARIES})
+endif()
+
 
 add_library(libxiv STATIC
         src/fiinparser.cpp
@@ -14,6 +59,4 @@ add_library(libxiv STATIC
         src/patch.cpp)
 target_include_directories(libxiv PUBLIC include PRIVATE src)
 target_link_libraries(libxiv PUBLIC
-        unshield
-        fmt::fmt
-        z)
+        ${LIBRARIES})

src/compression.cpp

@@ -2,8 +2,10 @@
 
 #include <zlib.h>
 #include <stdexcept>
+#include <string>
 
-// adopted from https://github.com/ahom/ffxiv_reverse/blob/312a0af8b58929fab48438aceae8da587be9407f/xiv/utils/src/zlib.cpp#L31
+// adopted from
+// https://github.com/ahom/ffxiv_reverse/blob/312a0af8b58929fab48438aceae8da587be9407f/xiv/utils/src/zlib.cpp#L31
 void zlib::no_header_decompress(uint8_t* in, uint32_t in_size, uint8_t* out, uint32_t out_size) {
     z_stream strm = {};
     strm.avail_in = in_size;

src/gamedata.cpp

@@ -6,6 +6,7 @@
 
 #include <string>
 #include <algorithm>
+#include <unordered_map>
 #include <fmt/printf.h>
 
 // TODO: should be enum?

src/installextract.cpp

@@ -1,5 +1,6 @@
 #include "installextract.h"
 
+#ifdef UNSHIELD_SUPPORTED
 #include <cstdio>
 #include <stdexcept>
 #include <libunshield.h>
@@ -134,4 +135,12 @@ void extractBootstrapFiles(const std::string_view installer, const std::string_v
     }
 
     fclose(file);
-}
+}
+
+#else
+
+void extractBootstrapFiles(const std::string_view installer, const std::string_view directory) {
+    // no op
+}
+
+#endif

src/patch.cpp

@@ -3,6 +3,7 @@
 #include <stdexcept>
 #include <cstdio>
 #include <fmt/core.h>
+#include <vector>
 
 #include "utility.h"
 #include "compression.h"