1 files changed, 346 insertions, 78 deletions

diff --git a/compat/mingw.c b/compat/mingw.c
index e9892f8ee4..9d435e2cf4 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -1,6 +1,7 @@
 #include "../git-compat-util.h"
 #include "win32.h"
 #include <conio.h>
+#include <wchar.h>
 #include "../strbuf.h"
 #include "../run-command.h"
 
@@ -198,14 +199,16 @@ static int ask_yes_no_if_possible(const char *format, ...)
 	}
 }
 
-#undef unlink
 int mingw_unlink(const char *pathname)
 {
 	int ret, tries = 0;
+	wchar_t wpathname[MAX_PATH];
+	if (xutftowcs_path(wpathname, pathname) < 0)
+		return -1;
 
 	/* read-only files cannot be removed */
-	chmod(pathname, 0666);
-	while ((ret = unlink(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
+	_wchmod(wpathname, 0666);
+	while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
 		if (!is_file_in_use_error(GetLastError()))
 			break;
 		/*
@@ -221,45 +224,45 @@ int mingw_unlink(const char *pathname)
 	while (ret == -1 && is_file_in_use_error(GetLastError()) &&
 	       ask_yes_no_if_possible("Unlink of file '%s' failed. "
 			"Should I try again?", pathname))
-	       ret = unlink(pathname);
+	       ret = _wunlink(wpathname);
 	return ret;
 }
 
-static int is_dir_empty(const char *path)
+static int is_dir_empty(const wchar_t *wpath)
 {
-	struct strbuf buf = STRBUF_INIT;
-	WIN32_FIND_DATAA findbuf;
+	WIN32_FIND_DATAW findbuf;
 	HANDLE handle;
-
-	strbuf_addf(&buf, "%s\\*", path);
-	handle = FindFirstFileA(buf.buf, &findbuf);
-	if (handle == INVALID_HANDLE_VALUE) {
-		strbuf_release(&buf);
+	wchar_t wbuf[MAX_PATH + 2];
+	wcscpy(wbuf, wpath);
+	wcscat(wbuf, L"\\*");
+	handle = FindFirstFileW(wbuf, &findbuf);
+	if (handle == INVALID_HANDLE_VALUE)
 		return GetLastError() == ERROR_NO_MORE_FILES;
-	}
 
-	while (!strcmp(findbuf.cFileName, ".") ||
-			!strcmp(findbuf.cFileName, ".."))
-		if (!FindNextFile(handle, &findbuf)) {
-			strbuf_release(&buf);
-			return GetLastError() == ERROR_NO_MORE_FILES;
+	while (!wcscmp(findbuf.cFileName, L".") ||
+			!wcscmp(findbuf.cFileName, L".."))
+		if (!FindNextFileW(handle, &findbuf)) {
+			DWORD err = GetLastError();
+			FindClose(handle);
+			return err == ERROR_NO_MORE_FILES;
 		}
 	FindClose(handle);
-	strbuf_release(&buf);
 	return 0;
 }
 
-#undef rmdir
 int mingw_rmdir(const char *pathname)
 {
 	int ret, tries = 0;
+	wchar_t wpathname[MAX_PATH];
+	if (xutftowcs_path(wpathname, pathname) < 0)
+		return -1;
 
-	while ((ret = rmdir(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
+	while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
 		if (!is_file_in_use_error(GetLastError()))
 			errno = err_win_to_posix(GetLastError());
 		if (errno != EACCES)
 			break;
-		if (!is_dir_empty(pathname)) {
+		if (!is_dir_empty(wpathname)) {
 			errno = ENOTEMPTY;
 			break;
 		}
@@ -276,16 +279,26 @@ int mingw_rmdir(const char *pathname)
 	while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) &&
 	       ask_yes_no_if_possible("Deletion of directory '%s' failed. "
 			"Should I try again?", pathname))
-	       ret = rmdir(pathname);
+	       ret = _wrmdir(wpathname);
+	return ret;
+}
+
+int mingw_mkdir(const char *path, int mode)
+{
+	int ret;
+	wchar_t wpath[MAX_PATH];
+	if (xutftowcs_path(wpath, path) < 0)
+		return -1;
+	ret = _wmkdir(wpath);
 	return ret;
 }
 
-#undef open
 int mingw_open (const char *filename, int oflags, ...)
 {
 	va_list args;
 	unsigned mode;
 	int fd;
+	wchar_t wfilename[MAX_PATH];
 
 	va_start(args, oflags);
 	mode = va_arg(args, int);
@@ -294,10 +307,12 @@ int mingw_open (const char *filename, int oflags, ...)
 	if (filename && !strcmp(filename, "/dev/null"))
 		filename = "nul";
 
-	fd = open(filename, oflags, mode);
+	if (xutftowcs_path(wfilename, filename) < 0)
+		return -1;
+	fd = _wopen(wfilename, oflags, mode);
 
 	if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
-		DWORD attrs = GetFileAttributes(filename);
+		DWORD attrs = GetFileAttributesW(wfilename);
 		if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
 			errno = EISDIR;
 	}
@@ -332,17 +347,28 @@ int mingw_fgetc(FILE *stream)
 #undef fopen
 FILE *mingw_fopen (const char *filename, const char *otype)
 {
+	FILE *file;
+	wchar_t wfilename[MAX_PATH], wotype[4];
 	if (filename && !strcmp(filename, "/dev/null"))
 		filename = "nul";
-	return fopen(filename, otype);
+	if (xutftowcs_path(wfilename, filename) < 0 ||
+		xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
+		return NULL;
+	file = _wfopen(wfilename, wotype);
+	return file;
 }
 
-#undef freopen
 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
 {
+	FILE *file;
+	wchar_t wfilename[MAX_PATH], wotype[4];
 	if (filename && !strcmp(filename, "/dev/null"))
 		filename = "nul";
-	return freopen(filename, otype, stream);
+	if (xutftowcs_path(wfilename, filename) < 0 ||
+		xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
+		return NULL;
+	file = _wfreopen(wfilename, wotype, stream);
+	return file;
 }
 
 #undef fflush
@@ -367,6 +393,31 @@ int mingw_fflush(FILE *stream)
 	return ret;
 }
 
+int mingw_access(const char *filename, int mode)
+{
+	wchar_t wfilename[MAX_PATH];
+	if (xutftowcs_path(wfilename, filename) < 0)
+		return -1;
+	/* X_OK is not supported by the MSVCRT version */
+	return _waccess(wfilename, mode & ~X_OK);
+}
+
+int mingw_chdir(const char *dirname)
+{
+	wchar_t wdirname[MAX_PATH];
+	if (xutftowcs_path(wdirname, dirname) < 0)
+		return -1;
+	return _wchdir(wdirname);
+}
+
+int mingw_chmod(const char *filename, int mode)
+{
+	wchar_t wfilename[MAX_PATH];
+	if (xutftowcs_path(wfilename, filename) < 0)
+		return -1;
+	return _wchmod(wfilename, mode);
+}
+
 /*
  * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
  * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
@@ -392,10 +443,12 @@ static inline time_t filetime_to_time_t(const FILETIME *ft)
  */
 static int do_lstat(int follow, const char *file_name, struct stat *buf)
 {
-	int err;
 	WIN32_FILE_ATTRIBUTE_DATA fdata;
+	wchar_t wfilename[MAX_PATH];
+	if (xutftowcs_path(wfilename, file_name) < 0)
+		return -1;
 
-	if (!(err = get_file_attr(file_name, &fdata))) {
+	if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
 		buf->st_ino = 0;
 		buf->st_gid = 0;
 		buf->st_uid = 0;
@@ -408,8 +461,8 @@ static int do_lstat(int follow, const char *file_name, struct stat *buf)
 		buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
 		buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
 		if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
-			WIN32_FIND_DATAA findbuf;
-			HANDLE handle = FindFirstFileA(file_name, &findbuf);
+			WIN32_FIND_DATAW findbuf;
+			HANDLE handle = FindFirstFileW(wfilename, &findbuf);
 			if (handle != INVALID_HANDLE_VALUE) {
 				if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
 						(findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
@@ -428,7 +481,23 @@ static int do_lstat(int follow, const char *file_name, struct stat *buf)
 		}
 		return 0;
 	}
-	errno = err;
+	switch (GetLastError()) {
+	case ERROR_ACCESS_DENIED:
+	case ERROR_SHARING_VIOLATION:
+	case ERROR_LOCK_VIOLATION:
+	case ERROR_SHARING_BUFFER_EXCEEDED:
+		errno = EACCES;
+		break;
+	case ERROR_BUFFER_OVERFLOW:
+		errno = ENAMETOOLONG;
+		break;
+	case ERROR_NOT_ENOUGH_MEMORY:
+		errno = ENOMEM;
+		break;
+	default:
+		errno = ENOENT;
+		break;
+	}
 	return -1;
 }
 
@@ -441,7 +510,7 @@ static int do_lstat(int follow, const char *file_name, struct stat *buf)
 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
 {
 	int namelen;
-	static char alt_name[PATH_MAX];
+	char alt_name[PATH_MAX];
 
 	if (!do_lstat(follow, file_name, buf))
 		return 0;
@@ -516,16 +585,20 @@ int mingw_utime (const char *file_name, const struct utimbuf *times)
 {
 	FILETIME mft, aft;
 	int fh, rc;
+	DWORD attrs;
+	wchar_t wfilename[MAX_PATH];
+	if (xutftowcs_path(wfilename, file_name) < 0)
+		return -1;
 
 	/* must have write permission */
-	DWORD attrs = GetFileAttributes(file_name);
+	attrs = GetFileAttributesW(wfilename);
 	if (attrs != INVALID_FILE_ATTRIBUTES &&
 	    (attrs & FILE_ATTRIBUTE_READONLY)) {
 		/* ignore errors here; open() will report them */
-		SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
+		SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
 	}
 
-	if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
+	if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
 		rc = -1;
 		goto revert_attrs;
 	}
@@ -548,7 +621,7 @@ revert_attrs:
 	if (attrs != INVALID_FILE_ATTRIBUTES &&
 	    (attrs & FILE_ATTRIBUTE_READONLY)) {
 		/* ignore errors again */
-		SetFileAttributes(file_name, attrs);
+		SetFileAttributesW(wfilename, attrs);
 	}
 	return rc;
 }
@@ -559,6 +632,18 @@ unsigned int sleep (unsigned int seconds)
 	return 0;
 }
 
+char *mingw_mktemp(char *template)
+{
+	wchar_t wtemplate[MAX_PATH];
+	if (xutftowcs_path(wtemplate, template) < 0)
+		return NULL;
+	if (!_wmktemp(wtemplate))
+		return NULL;
+	if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
+		return NULL;
+	return template;
+}
+
 int mkstemp(char *template)
 {
 	char *filename = mktemp(template);
@@ -617,17 +702,18 @@ struct tm *localtime_r(const time_t *timep, struct tm *result)
 	return result;
 }
 
-#undef getcwd
 char *mingw_getcwd(char *pointer, int len)
 {
 	int i;
-	char *ret = getcwd(pointer, len);
-	if (!ret)
-		return ret;
+	wchar_t wpointer[MAX_PATH];
+	if (!_wgetcwd(wpointer, ARRAY_SIZE(wpointer)))
+		return NULL;
+	if (xwcstoutf(pointer, wpointer, len) < 0)
+		return NULL;
 	for (i = 0; pointer[i]; i++)
 		if (pointer[i] == '\\')
 			pointer[i] = '/';
-	return ret;
+	return pointer;
 }
 
 /*
@@ -831,9 +917,10 @@ static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
 			      const char *dir,
 			      int prepend_cmd, int fhin, int fhout, int fherr)
 {
-	STARTUPINFO si;
+	STARTUPINFOW si;
 	PROCESS_INFORMATION pi;
 	struct strbuf envblk, args;
+	wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs;
 	unsigned flags;
 	BOOL ret;
 
@@ -865,9 +952,14 @@ static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
 	memset(&si, 0, sizeof(si));
 	si.cb = sizeof(si);
 	si.dwFlags = STARTF_USESTDHANDLES;
-	si.hStdInput = (HANDLE) _get_osfhandle(fhin);
-	si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
-	si.hStdError = (HANDLE) _get_osfhandle(fherr);
+	si.hStdInput = winansi_get_osfhandle(fhin);
+	si.hStdOutput = winansi_get_osfhandle(fhout);
+	si.hStdError = winansi_get_osfhandle(fherr);
+
+	if (xutftowcs_path(wcmd, cmd) < 0)
+		return -1;
+	if (dir && xutftowcs_path(wdir, dir) < 0)
+		return -1;
 
 	/* concatenate argv, quoting args as we go */
 	strbuf_init(&args, 0);
@@ -886,6 +978,10 @@ static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
 			free(quoted);
 	}
 
+	wargs = xmalloc((2 * args.len + 1) * sizeof(wchar_t));
+	xutftowcs(wargs, args.buf, 2 * args.len + 1);
+	strbuf_release(&args);
+
 	if (env) {
 		int count = 0;
 		char **e, **sorted_env;
@@ -907,12 +1003,12 @@ static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
 	}
 
 	memset(&pi, 0, sizeof(pi));
-	ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
-		env ? envblk.buf : NULL, dir, &si, &pi);
+	ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
+		env ? envblk.buf : NULL, dir ? wdir : NULL, &si, &pi);
 
 	if (env)
 		strbuf_release(&envblk);
-	strbuf_release(&args);
+	free(wargs);
 
 	if (!ret) {
 		errno = ENOENT;
@@ -941,10 +1037,9 @@ static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
 	return (pid_t)pi.dwProcessId;
 }
 
-static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
-			   int prepend_cmd)
+static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
 {
-	return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
+	return mingw_spawnve_fd(cmd, argv, environ, NULL, prepend_cmd, 0, 1, 2);
 }
 
 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
@@ -986,7 +1081,7 @@ pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
 	return pid;
 }
 
-static int try_shell_exec(const char *cmd, char *const *argv, char **env)
+static int try_shell_exec(const char *cmd, char *const *argv)
 {
 	const char *interpr = parse_interpreter(cmd);
 	char **path;
@@ -1004,7 +1099,7 @@ static int try_shell_exec(const char *cmd, char *const *argv, char **env)
 		argv2 = xmalloc(sizeof(*argv) * (argc+1));
 		argv2[0] = (char *)cmd;	/* full path to the script file */
 		memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
-		pid = mingw_spawnve(prog, argv2, env, 1);
+		pid = mingw_spawnv(prog, argv2, 1);
 		if (pid >= 0) {
 			int status;
 			if (waitpid(pid, &status, 0) < 0)
@@ -1019,19 +1114,20 @@ static int try_shell_exec(const char *cmd, char *const *argv, char **env)
 	return pid;
 }
 
-static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
+int mingw_execv(const char *cmd, char *const *argv)
 {
 	/* check if git_command is a shell script */
-	if (!try_shell_exec(cmd, argv, (char **)env)) {
+	if (!try_shell_exec(cmd, argv)) {
 		int pid, status;
 
-		pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
+		pid = mingw_spawnv(cmd, (const char **)argv, 0);
 		if (pid < 0)
-			return;
+			return -1;
 		if (waitpid(pid, &status, 0) < 0)
 			status = 255;
 		exit(status);
 	}
+	return -1;
 }
 
 int mingw_execvp(const char *cmd, char *const *argv)
@@ -1040,7 +1136,7 @@ int mingw_execvp(const char *cmd, char *const *argv)
 	char *prog = path_lookup(cmd, path, 0);
 
 	if (prog) {
-		mingw_execve(prog, argv, environ);
+		mingw_execv(prog, argv);
 		free(prog);
 	} else
 		errno = ENOENT;
@@ -1049,12 +1145,6 @@ int mingw_execvp(const char *cmd, char *const *argv)
 	return -1;
 }
 
-int mingw_execv(const char *cmd, char *const *argv)
-{
-	mingw_execve(cmd, argv, environ);
-	return -1;
-}
-
 int mingw_kill(pid_t pid, int sig)
 {
 	if (pid > 0 && sig == SIGTERM) {
@@ -1226,8 +1316,7 @@ static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
 	else
 		ai->ai_canonname = NULL;
 
-	sin = xmalloc(ai->ai_addrlen);
-	memset(sin, 0, ai->ai_addrlen);
+	sin = xcalloc(1, ai->ai_addrlen);
 	sin->sin_family = AF_INET;
 	/* Note: getaddrinfo is supposed to allow service to be a string,
 	 * which should be looked up using getservbyname. This is
@@ -1481,33 +1570,36 @@ int mingw_rename(const char *pold, const char *pnew)
 {
 	DWORD attrs, gle;
 	int tries = 0;
+	wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
+	if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
+		return -1;
 
 	/*
 	 * Try native rename() first to get errno right.
 	 * It is based on MoveFile(), which cannot overwrite existing files.
 	 */
-	if (!rename(pold, pnew))
+	if (!_wrename(wpold, wpnew))
 		return 0;
 	if (errno != EEXIST)
 		return -1;
 repeat:
-	if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
+	if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
 		return 0;
 	/* TODO: translate more errors */
 	gle = GetLastError();
 	if (gle == ERROR_ACCESS_DENIED &&
-	    (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
+	    (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
 		if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
 			errno = EISDIR;
 			return -1;
 		}
 		if ((attrs & FILE_ATTRIBUTE_READONLY) &&
-		    SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
-			if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
+		    SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
+			if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
 				return 0;
 			gle = GetLastError();
 			/* revert file attributes on failure */
-			SetFileAttributes(pnew, attrs);
+			SetFileAttributesW(wpnew, attrs);
 		}
 	}
 	if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
@@ -1753,11 +1845,16 @@ void mingw_open_html(const char *unixpath)
 
 int link(const char *oldpath, const char *newpath)
 {
-	typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
+	typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
 	static T create_hard_link = NULL;
+	wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
+	if (xutftowcs_path(woldpath, oldpath) < 0 ||
+		xutftowcs_path(wnewpath, newpath) < 0)
+		return -1;
+
 	if (!create_hard_link) {
 		create_hard_link = (T) GetProcAddress(
-			GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
+			GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
 		if (!create_hard_link)
 			create_hard_link = (T)-1;
 	}
@@ -1765,7 +1862,7 @@ int link(const char *oldpath, const char *newpath)
 		errno = ENOSYS;
 		return -1;
 	}
-	if (!create_hard_link(newpath, oldpath, NULL)) {
+	if (!create_hard_link(wnewpath, woldpath, NULL)) {
 		errno = err_win_to_posix(GetLastError());
 		return -1;
 	}
@@ -1823,3 +1920,174 @@ pid_t waitpid(pid_t pid, int *status, int options)
 	errno = EINVAL;
 	return -1;
 }
+
+int mingw_offset_1st_component(const char *path)
+{
+	int offset = 0;
+	if (has_dos_drive_prefix(path))
+		offset = 2;
+
+	/* unc paths */
+	else if (is_dir_sep(path[0]) && is_dir_sep(path[1])) {
+
+		/* skip server name */
+		char *pos = strpbrk(path + 2, "\\/");
+		if (!pos)
+			return 0; /* Error: malformed unc path */
+
+		do {
+			pos++;
+		} while (*pos && !is_dir_sep(*pos));
+
+		offset = pos - path;
+	}
+
+	return offset + is_dir_sep(path[offset]);
+}
+
+int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
+{
+	int upos = 0, wpos = 0;
+	const unsigned char *utf = (const unsigned char*) utfs;
+	if (!utf || !wcs || wcslen < 1) {
+		errno = EINVAL;
+		return -1;
+	}
+	/* reserve space for \0 */
+	wcslen--;
+	if (utflen < 0)
+		utflen = INT_MAX;
+
+	while (upos < utflen) {
+		int c = utf[upos++] & 0xff;
+		if (utflen == INT_MAX && c == 0)
+			break;
+
+		if (wpos >= wcslen) {
+			wcs[wpos] = 0;
+			errno = ERANGE;
+			return -1;
+		}
+
+		if (c < 0x80) {
+			/* ASCII */
+			wcs[wpos++] = c;
+		} else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
+				(utf[upos] & 0xc0) == 0x80) {
+			/* 2-byte utf-8 */
+			c = ((c & 0x1f) << 6);
+			c |= (utf[upos++] & 0x3f);
+			wcs[wpos++] = c;
+		} else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
+				!(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
+				(utf[upos] & 0xc0) == 0x80 &&
+				(utf[upos + 1] & 0xc0) == 0x80) {
+			/* 3-byte utf-8 */
+			c = ((c & 0x0f) << 12);
+			c |= ((utf[upos++] & 0x3f) << 6);
+			c |= (utf[upos++] & 0x3f);
+			wcs[wpos++] = c;
+		} else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
+				wpos + 1 < wcslen &&
+				!(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
+				!(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
+				(utf[upos] & 0xc0) == 0x80 &&
+				(utf[upos + 1] & 0xc0) == 0x80 &&
+				(utf[upos + 2] & 0xc0) == 0x80) {
+			/* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
+			c = ((c & 0x07) << 18);
+			c |= ((utf[upos++] & 0x3f) << 12);
+			c |= ((utf[upos++] & 0x3f) << 6);
+			c |= (utf[upos++] & 0x3f);
+			c -= 0x10000;
+			wcs[wpos++] = 0xd800 | (c >> 10);
+			wcs[wpos++] = 0xdc00 | (c & 0x3ff);
+		} else if (c >= 0xa0) {
+			/* invalid utf-8 byte, printable unicode char: convert 1:1 */
+			wcs[wpos++] = c;
+		} else {
+			/* invalid utf-8 byte, non-printable unicode: convert to hex */
+			static const char *hex = "0123456789abcdef";
+			wcs[wpos++] = hex[c >> 4];
+			if (wpos < wcslen)
+				wcs[wpos++] = hex[c & 0x0f];
+		}
+	}
+	wcs[wpos] = 0;
+	return wpos;
+}
+
+int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
+{
+	if (!wcs || !utf || utflen < 1) {
+		errno = EINVAL;
+		return -1;
+	}
+	utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
+	if (utflen)
+		return utflen - 1;
+	errno = ERANGE;
+	return -1;
+}
+
+/*
+ * Disable MSVCRT command line wildcard expansion (__getmainargs called from
+ * mingw startup code, see init.c in mingw runtime).
+ */
+int _CRT_glob = 0;
+
+typedef struct {
+	int newmode;
+} _startupinfo;
+
+extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
+		_startupinfo *si);
+
+static NORETURN void die_startup()
+{
+	fputs("fatal: not enough memory for initialization", stderr);
+	exit(128);
+}
+
+void mingw_startup()
+{
+	int i, len, maxlen, argc;
+	char *buffer;
+	wchar_t **wenv, **wargv;
+	_startupinfo si;
+
+	/* get wide char arguments and environment */
+	si.newmode = 0;
+	if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0)
+		die_startup();
+
+	/* determine size of argv and environ conversion buffer */
+	maxlen = wcslen(_wpgmptr);
+	for (i = 1; i < argc; i++)
+		maxlen = max(maxlen, wcslen(wargv[i]));
+
+	/* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
+	maxlen = 3 * maxlen + 1;
+	buffer = xmalloc(maxlen);
+
+	/* convert command line arguments and environment to UTF-8 */
+	len = xwcstoutf(buffer, _wpgmptr, maxlen);
+	__argv[0] = xmemdupz(buffer, len);
+	for (i = 1; i < argc; i++) {
+		len = xwcstoutf(buffer, wargv[i], maxlen);
+		__argv[i] = xmemdupz(buffer, len);
+	}
+	free(buffer);
+
+	/* initialize critical section for waitpid pinfo_t list */
+	InitializeCriticalSection(&pinfo_cs);
+
+	/* set up default file mode and file modes for stdin/out/err */
+	_fmode = _O_BINARY;
+	_setmode(_fileno(stdin), _O_BINARY);
+	_setmode(_fileno(stdout), _O_BINARY);
+	_setmode(_fileno(stderr), _O_BINARY);
+
+	/* initialize Unicode console */
+	winansi_init();
+}