checkout tests: emulate p_realpath poorly on Win32

tests/checkout/icase.c

@@ -3,6 +3,10 @@
 #include "git2/checkout.h"
 #include "path.h"
 
+#ifdef GIT_WIN32
+# include <Windows.h>
+#endif
+
 static git_repository *repo;
 static git_object *obj;
 static git_checkout_options checkout_opts;
@@ -26,12 +30,71 @@ void test_checkout_icase__cleanup(void)
 	cl_git_sandbox_cleanup();
 }
 
+static char *p_realpath(const char *in)
+{
+#ifdef GIT_WIN32
+	/*
+
+	HANDLE fh, mh;
+	HINSTANCE psapi;
+	BY_HANDLE_FILE_INFORMATION fi;
+	void *map;
+	char *filename;
+	size_t filename_len = 1024;
+
+	typedef DWORD (__stdcall *getmappedfilename)(HANDLE, LPVOID, LPTSTR, DWORD);
+	getmappedfilename getfunc;
+
+	cl_assert(filename = malloc(filename_len));
+
+	cl_win32_pass(psapi = LoadLibrary("psapi.dll"));
+	cl_win32_pass(getfunc = (getmappedfilename)GetProcAddress(psapi, "GetMappedFileNameA"));
+
+	cl_win32_pass(fh = CreateFileA(in, GENERIC_READ, FILE_SHARE_READ,
+		NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL));
+	cl_win32_pass(mh = CreateFileMapping(fh, NULL, PAGE_READONLY, 0, 1, NULL));
+
+	cl_win32_pass(map = MapViewOfFile(mh, FILE_MAP_READ, 0, 0, 1));
+
+	cl_win32_pass(getfunc(GetCurrentProcess(), map, filename, filename_len));
+
+	UnmapViewOfFile(map);
+	CloseHandle(mh);
+	CloseHandle(fh);
+*/
+
+	HANDLE fh;
+	HINSTANCE kerneldll;
+	char *filename;
+
+	typedef DWORD (__stdcall *getfinalpathname)(HANDLE, LPSTR, DWORD, DWORD);
+	getfinalpathname getfinalpathfn;
+
+	cl_assert(filename = malloc(MAX_PATH));
+	cl_win32_pass(kerneldll = LoadLibrary("kernel32.dll"));
+	cl_win32_pass(getfinalpathfn = (getfinalpathname)GetProcAddress(kerneldll, "GetFinalPathNameByHandleA"));
+
+	cl_win32_pass(fh = CreateFileA(in, FILE_READ_ATTRIBUTES | STANDARD_RIGHTS_READ, FILE_SHARE_READ,
+		NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL));
+
+	cl_win32_pass(getfinalpathfn(fh, filename, MAX_PATH, VOLUME_NAME_DOS));
+
+	CloseHandle(fh);
+
+	git_path_mkposix(filename);
+
+	return filename;
+#else
+	return realpath(in, NULL);
+#endif
+}
+
 static void assert_name_is(const char *expected)
 {
 	char *actual;
 	size_t actual_len, expected_len, start;
 
-	cl_assert(actual = realpath(expected, NULL));
+	cl_assert(actual = p_realpath(expected));
 
 	expected_len = strlen(expected);
 	actual_len = strlen(actual);