Fix mkdir() special case for path length < 260 and > 248

ext/standard/tests/file/windows_mb_path/test_long_path_mkdir.phpt

@@ -0,0 +1,60 @@
+--TEST--
+Mkdir with path length < 260 and > 248 has be a long path 
+--SKIPIF--
+<?php
+include dirname(__FILE__) . DIRECTORY_SEPARATOR . "util.inc";
+
+skip_if_not_win();
+
+$start = realpath(dirname(__FILE__));
+if (strlen($start) > 260 || strlen($start) > 248) {
+	die("skip the starting path length is unsuitable for this test");
+}
+
+?>
+--FILE--
+<?php
+
+$p = ""; 
+$s = str_repeat('a', 50);
+$how_many = 32;
+
+for ($i = 0; $i < $how_many; $i++) {
+	$p .= "$s\\";
+} 
+
+$start = realpath(dirname(__FILE__));
+if (strlen($start) <= 248) {
+	// create the exact length
+	$start = $start . "\\" . str_repeat('a', 251 - strlen($start) - 1);
+}
+
+var_dump($start);
+$p = $start . "\\" . $p;
+
+var_dump($p);
+var_dump(mkdir($p, 0777, true));
+var_dump(file_exists($p));
+
+$p7 = $p . "hello.txt";
+
+var_dump(file_put_contents($p7, "hello"));
+var_dump(file_get_contents($p7));
+
+// cleanup
+unlink($p7);
+for ($i = 0; $i < $how_many; $i++) {
+	$p0 = substr($p, 0, strlen($p) - $i*51);
+	rmdir($p0);
+}
+
+?>
+===DONE===
+--EXPECTF--
+string(251) "%s"
+string(1884) "%s"
+bool(true)
+bool(true)
+int(5)
+string(5) "hello"
+===DONE===

win32/ioutil.c

@@ -306,10 +306,37 @@ PW32IO int php_win32_ioutil_mkdir_w(const wchar_t *path, mode_t mode)
 
 PW32IO int php_win32_ioutil_mkdir(const char *path, mode_t mode)
 {/*{{{*/
-	wchar_t *pathw = php_win32_ioutil_any_to_w(path);
+	size_t pathw_len = 0;
+	wchar_t *pathw = php_win32_ioutil_conv_any_to_w(path, 0, &pathw_len);
 	int ret = 0;
 	DWORD err = 0;
 
+	if (pathw_len < _MAX_PATH && pathw_len > _MAX_PATH - 12) {
+		/* Special case here. From the doc:
+
+		 "When using an API to create a directory, the specified path cannot be
+		 so long that you cannot append an 8.3 file name ..."
+
+		 Thus, if the directory name length happens to be in this range, it
+		 already needs to be a long path. The given path is already normalized
+		 and prepared, need only to prefix it.
+		 */
+		wchar_t *tmp = (wchar_t *) malloc((pathw_len + PHP_WIN32_IOUTIL_LONG_PATH_PREFIX_LENW + 1) * sizeof(wchar_t));
+		if (!tmp) {
+			free(pathw);
+			SET_ERRNO_FROM_WIN32_CODE(ERROR_NOT_ENOUGH_MEMORY);
+			return -1;
+		}
+
+		memmove(tmp, PHP_WIN32_IOUTIL_LONG_PATH_PREFIXW, PHP_WIN32_IOUTIL_LONG_PATH_PREFIX_LENW * sizeof(wchar_t));
+		memmove(tmp+PHP_WIN32_IOUTIL_LONG_PATH_PREFIX_LENW, pathw, pathw_len * sizeof(wchar_t));
+		pathw_len += PHP_WIN32_IOUTIL_LONG_PATH_PREFIX_LENW;
+		tmp[pathw_len] = L'\0';
+
+		free(pathw);
+		pathw = tmp;
+	}
+
 	/* TODO extend with mode usage */
 	if (!pathw) {
 		SET_ERRNO_FROM_WIN32_CODE(ERROR_INVALID_PARAMETER);