From 5fb87ea4c4e5f30c9ee40a56e3487c0358d69783 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Fri, 26 Apr 2019 12:11:42 +1000
Subject: [PATCH] posix/ostream: add stat ostream operators

---
 CMakeLists.txt    |  2 ++
 posix/ostream.cpp | 78 +++++++++++++++++++++++++++++++++++++++++++++++
 posix/ostream.hpp | 16 ++++++++++
 3 files changed, 96 insertions(+)
 create mode 100644 posix/ostream.cpp
 create mode 100644 posix/ostream.hpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c89ed9d1..3a405e79 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -91,6 +91,8 @@ list (
     posix/except.hpp
     posix/fd.cpp
     posix/fd.hpp
+    posix/ostream.cpp
+    posix/ostream.hpp
     posix/util.cpp
     posix/util.hpp
 )
diff --git a/posix/ostream.cpp b/posix/ostream.cpp
new file mode 100644
index 00000000..6a244ab9
--- /dev/null
+++ b/posix/ostream.cpp
@@ -0,0 +1,78 @@
+#include "ostream.hpp"
+
+#include <ostream>
+#include <iomanip>
+
+
+///////////////////////////////////////////////////////////////////////////////
+struct type_printer {
+    type_printer (struct stat const &_data)
+        : data (_data)
+    { ; }
+
+    struct stat const &data;
+};
+
+
+//-----------------------------------------------------------------------------
+std::ostream& operator<< (std::ostream &os, type_printer const &val)
+{
+    os << "[ ";
+    if (val.data.st_mode & S_ISUID) os << "SUID, ";
+    if (val.data.st_mode & S_ISGID) os << "SGID, ";
+    if (val.data.st_mode & S_ISVTX) os << "STICKY, ";
+
+    os << "{ user: "  << (val.data.st_mode & S_IRUSR ? 'r' : '_')
+        << (val.data.st_mode & S_IWUSR ? 'w' : '_')
+        << (val.data.st_mode & S_IXUSR ? 'x' : '_')
+        << " }, "
+        << "{ group: " << (val.data.st_mode & S_IRGRP ? 'r' : '_')
+        << (val.data.st_mode & S_IWGRP ? 'w' : '_')
+        << (val.data.st_mode & S_IXGRP ? 'x' : '_')
+        << " }, "
+        << "{ group: " << (val.data.st_mode & S_IROTH ? 'r' : '_')
+        << (val.data.st_mode & S_IWOTH ? 'w' : '_')
+        << (val.data.st_mode & S_IXOTH ? 'x' : '_')
+        << " }";
+
+    return os;
+}
+
+
+///////////////////////////////////////////////////////////////////////////////
+struct mode_printer {
+    mode_printer (struct stat const &_data)
+        : data (_data)
+    { ; }
+
+    struct stat const &data;
+};
+
+
+//-----------------------------------------------------------------------------
+std::ostream& operator<< (std::ostream &os, mode_printer const &val)
+{
+    return S_ISREG  (val.data.st_mode) ? os << "REGULAR"
+                                       : S_ISDIR  (val.data.st_mode) ? os << "DIRECTORY"
+                                                                     : S_ISCHR  (val.data.st_mode) ? os << "CHARACTER"
+                                                                                                   : S_ISBLK  (val.data.st_mode) ? os << "BLOCK"
+                                                                                                                                 : S_ISFIFO (val.data.st_mode) ? os << "FIFO"
+                                                                                                                                                               : S_ISLNK  (val.data.st_mode) ? os << "SYMLINK"
+                                                                                                                                                                                             : S_ISSOCK (val.data.st_mode) ? os << "SOCKET"
+                                                                                                                                                                                                                           : (throw std::invalid_argument ("Unhandled mode_t"), os << "_error");
+}
+
+
+//-----------------------------------------------------------------------------
+std::ostream& operator<< (std::ostream &os, struct stat const &val)
+{
+    return os << "{ dev: "  << val.st_dev
+        << ", ino: "  << val.st_ino
+        << ", type: " << type_printer (val)
+        << ", mode: " << mode_printer (val)
+        << ", uid: "  << val.st_uid
+        << ", gid: "  << val.st_gid
+        << ", size: " << val.st_size
+        << ", blocksize: " << val.st_blksize
+        << " }";
+}
diff --git a/posix/ostream.hpp b/posix/ostream.hpp
new file mode 100644
index 00000000..31996d4f
--- /dev/null
+++ b/posix/ostream.hpp
@@ -0,0 +1,16 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * Copyright 2019, Danny Robson <danny@nerdcruft.net>
+ */
+
+#pragma once
+
+#include <iosfwd>
+
+#include <sys/stat.h>
+
+///////////////////////////////////////////////////////////////////////////
+std::ostream& operator<< (std::ostream& os, struct ::stat const &);