From 20e3aedeb7df742c38276fb41cae8f3eb027b6dd Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 8 Dec 2014 08:25:29 +0200
Subject: Add filesystem path class

g++-4.9 -std=c++11 -I.. -o bd bd.cxx process.cxx timestamp.cxx path.cxx
---
 build/path.cxx | 114 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 build/path.cxx

(limited to 'build/path.cxx')

diff --git a/build/path.cxx b/build/path.cxx
new file mode 100644
index 0000000..efd0532
--- /dev/null
+++ b/build/path.cxx
@@ -0,0 +1,114 @@
+// file      : build/path.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2015 Code Synthesis Tools CC
+// license   : MIT; see accompanying LICENSE file
+
+#include <build/path>
+
+#ifdef _WIN32
+#  include <stdlib.h> // _MAX_PATH
+#  include <direct.h> // _[w]getcwd, _[w]chdir
+#else
+#  include <stdlib.h> // mbstowcs, wcstombs
+#  include <limits.h> // PATH_MAX
+#  include <unistd.h> // getcwd, chdir
+#endif
+
+namespace build
+{
+  char const* invalid_path_base::
+  what () const throw ()
+  {
+    return "invalid filesystem path";
+  }
+
+  //
+  // char
+  //
+
+  template <>
+  basic_path<char> basic_path<char>::
+  current ()
+  {
+    // @@ throw system_error (and in the other current() versions).
+
+#ifdef _WIN32
+    char cwd[_MAX_PATH];
+    if(_getcwd(cwd, _MAX_PATH) == 0)
+      throw invalid_basic_path<char> (".");
+#else
+    char cwd[PATH_MAX];
+    if (getcwd (cwd, PATH_MAX) == 0)
+      throw invalid_basic_path<char> (".");
+#endif
+
+    return basic_path<char> (cwd);
+  }
+
+  template <>
+  void basic_path<char>::
+  current (basic_path const& p)
+  {
+    string_type const& s (p.string ());
+
+    if (p.empty ())
+      throw invalid_basic_path<char> (s);
+
+#ifdef _WIN32
+    if(_chdir(s.c_str ()) != 0)
+      throw invalid_basic_path<char> (s);
+#else
+    if (chdir (s.c_str ()) != 0)
+      throw invalid_basic_path<char> (s);
+#endif
+  }
+
+  //
+  // wchar_t
+  //
+
+  template <>
+  basic_path<wchar_t> basic_path<wchar_t>::
+  current ()
+  {
+#ifdef _WIN32
+    wchar_t wcwd[_MAX_PATH];
+    if(_wgetcwd(wcwd, _MAX_PATH) == 0)
+      throw invalid_basic_path<wchar_t> (L".");
+#else
+    char cwd[PATH_MAX];
+    if (getcwd (cwd, PATH_MAX) == 0)
+      throw invalid_basic_path<wchar_t> (L".");
+
+    wchar_t wcwd[PATH_MAX];
+    if (mbstowcs (wcwd, cwd, PATH_MAX) == size_type (-1))
+      throw invalid_basic_path<wchar_t> (L".");
+#endif
+
+    return basic_path<wchar_t> (wcwd);
+  }
+
+  template <>
+  void basic_path<wchar_t>::
+  current (basic_path const& p)
+  {
+    string_type const& s (p.string ());
+
+    if (p.empty ())
+      throw invalid_basic_path<wchar_t> (s);
+
+#ifdef _WIN32
+    if(_wchdir(s.c_str ()) != 0)
+      throw invalid_basic_path<wchar_t> (s);
+#else
+    char ns[PATH_MAX + 1];
+
+    if (wcstombs (ns, s.c_str (), PATH_MAX) == size_type (-1))
+      throw invalid_basic_path<wchar_t> (s);
+
+    ns[PATH_MAX] = '\0';
+
+    if (chdir (ns) != 0)
+      throw invalid_basic_path<wchar_t> (s);
+#endif
+  }
+}
-- 
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