Fix compilation on MSVC

Pugixml is now downloaded if not found, and the CMake messages are now
clearer that the dependency is downloaded from the internet.

The POSIX getline function is now replaced with std::getline, which
works on MSVC.

CMakeLists.txt

@@ -9,7 +9,7 @@ if(TARGET fmt::fmt)
 
     set(LIBRARIES fmt::fmt ${LIBRARIES})
 else()
-    message("Using built-in fmt")
+    message("Using downloaded fmt")
 
     FetchContent_Declare(
     fmt
@@ -41,7 +41,7 @@ if(TARGET ZLIB::ZLIB)
 
     set(LIBRARIES ZLIB::ZLIB ${LIBRARIES})
 else()
-    message("Using built-in zlib")
+    message("Using downloaded zlib")
 
     FetchContent_Declare(
             zlib
@@ -61,7 +61,21 @@ else()
     set(LIBRARIES zlibstatic ${LIBRARIES})
 endif()
 
-find_package(pugixml REQUIRED)
+find_package(pugixml QUIET)
+
+if(TARGET pugixml::pugixml)
+    message("Using system library for zlib")
+else()
+    message("Using downloaded pugixml")
+
+    FetchContent_Declare(
+    pugixml
+    GIT_REPOSITORY https://github.com/zeux/pugixml.git
+    GIT_TAG        master
+    )
+
+    FetchContent_MakeAvailable(pugixml)
+endif()
 
 add_library(libxiv STATIC
         src/fiinparser.cpp

src/exlparser.cpp

@@ -1,20 +1,20 @@
 #include "exlparser.h"
+
 #include <stdexcept>
+#include <fstream>
 
 EXL readEXL(std::string_view path) {
-    FILE* file = fopen(path.data(), "rb");
-    if(!file) {
+    std::fstream file;
+    file.open(path.data(), std::iostream::in);
+
+    if(!file.is_open()) {
         throw std::runtime_error("Failed to read exl file from " + std::string(path.data()));
     }
 
     EXL exl;
 
-    char* data = nullptr;
-    size_t len = 0;
-
-    while ((getline(&data, &len, file)) != -1) {
-        std::string line = data;
-
+    std::string line;
+    while (std::getline(file, line)) {
         const size_t comma = line.find_first_of(',');
 
         std::string name = line.substr(0, comma);

src/mdlparser.cpp

@@ -7,6 +7,9 @@
 #include <fstream>
 #include <algorithm>
 
+using ushort = unsigned short;
+using uint = unsigned int;
+
 // from lumina.halfextensions
 static float Unpack(ushort value) {
     uint num3;