Open output files and generate boilerplate code

1 files changed, 193 insertions, 1 deletions

diff --git a/cli/generator.cxx b/cli/generator.cxx
index a5c588c..cf9de69 100644
--- a/cli/generator.cxx
+++ b/cli/generator.cxx
@@ -3,13 +3,205 @@
 // copyright : Copyright (c) 2009 Code Synthesis Tools CC
 // license   : MIT; see accompanying LICENSE file
 
+#include <cctype>  // std::toupper, std::is{alpha,upper,lower}
+#include <string>
+#include <fstream>
+#include <iostream>
+
+#include <cutl/fs/auto-remove.hxx>
+
+#include <cutl/compiler/code-stream.hxx>
+#include <cutl/compiler/cxx-indenter.hxx>
+
+#include "context.hxx"
 #include "generator.hxx"
 
+using namespace std;
+using namespace cutl;
+using namespace cutl;
+
+using semantics::path;
+
+namespace
+{
+  static char const header[] =
+  "// This code was generated by CLI, a command line interface\n"
+  "// compiler for C++.\n"
+  "//\n\n";
+
+  string
+  make_guard (string const& file, string const& prefix, context& ctx)
+  {
+    string g (file);
+
+    if (!prefix.empty ())
+      g = prefix + '_' + g;
+
+    // Split words, e.g., "FooBar" to "Foo_Bar" and convert everything
+    // to upper case.
+    //
+    string r;
+    for (string::size_type i (0), n (g.size ()); i < n - 1; ++i)
+    {
+      char c1 (g[i]);
+      char c2 (g[i + 1]);
+
+      r += toupper (c1);
+
+      if (isalpha (c1) && isalpha (c2) && islower (c1) && isupper (c2))
+        r += "_";
+    }
+    r += toupper (g[g.size () - 1]);
+
+    return ctx.escape (r);
+  }
+}
+
 generator::
 generator ()
 {
 }
+
 void generator::
-generate (semantics::cli_unit& unit, semantics::path const& path)
+generate (semantics::cli_unit& unit, path const& p)
 {
+  try
+  {
+    bool inl (false);
+
+    string hxx_suffix (".hxx");
+    string ixx_suffix (".ixx");
+    string cxx_suffix (".cxx");
+
+    string out_dir;
+
+    path file (p.leaf ());
+    string base (file.base ().string ());
+
+    string hxx_name (base + hxx_suffix);
+    string ixx_name (base + ixx_suffix);
+    string cxx_name (base + cxx_suffix);
+
+    path hxx_path (hxx_name);
+    path ixx_path (ixx_name);
+    path cxx_path (cxx_name);
+
+    if (!out_dir.empty ())
+    {
+      path dir (out_dir);
+
+      hxx_path = dir / hxx_path;
+      ixx_path = dir / ixx_path;
+      cxx_path = dir / cxx_path;
+    }
+
+    fs::auto_removes auto_rm;
+
+    //
+    //
+    ofstream hxx (hxx_path.string ().c_str ());
+
+    if (!hxx.is_open ())
+    {
+      cerr << "error: unable to open '" << hxx_path << "' in write mode"
+           << endl;
+      throw failed ();
+    }
+
+    auto_rm.add (hxx_path);
+
+    //
+    //
+    ofstream ixx;
+
+    if (inl)
+    {
+      ixx.open (ixx_path.string ().c_str (), ios_base::out);
+
+      if (!ixx.is_open ())
+      {
+        cerr << "error: unable to open '" << ixx_path << "' in write mode"
+             << endl;
+        throw failed ();
+      }
+
+      auto_rm.add (ixx_path);
+    }
+
+    //
+    //
+    ofstream cxx (cxx_path.string ().c_str ());
+
+    if (!cxx.is_open ())
+    {
+      cerr << "error: unable to open '" << cxx_path << "' in write mode"
+           << endl;
+      throw failed ();
+    }
+
+    auto_rm.add (cxx_path);
+
+    // Print headers.
+    //
+    hxx << header;
+    if (inl)
+      ixx << header;
+    cxx << header;
+
+    typedef compiler::ostream_filter<compiler::cxx_indenter, char> cxx_filter;
+
+    // HXX
+    //
+    {
+      cxx_filter filt (hxx);
+      context ctx (hxx);
+
+      string guard (make_guard (hxx_name, "", ctx));
+
+      hxx << "#ifndef " << guard << endl
+          << "#define " << guard << endl
+          << endl;
+
+
+      if (inl)
+      {
+        hxx << "#include \"" << ixx_name << "\"" << endl
+            << endl;
+      }
+
+      hxx << "#endif // " << guard << endl;
+    }
+
+    // IXX
+    //
+    if (inl)
+    {
+      cxx_filter filt (ixx);
+      context ctx (ixx);
+    }
+
+    // CXX
+    //
+    {
+      cxx_filter filt (cxx);
+      context ctx (cxx);
+
+      cxx << "#include \"" << hxx_name << "\"" << endl
+          << endl;
+    }
+
+    auto_rm.cancel ();
+  }
+  catch (semantics::invalid_path const& e)
+  {
+    cerr << "error: '" << e.path () << "' is not a valid filesystem path"
+         << endl;
+    throw failed ();
+  }
+  catch (fs::error const&)
+  {
+    // Auto-removal of generated files failed. Ignore it.
+    //
+    throw failed ();
+  }
 }