1 files changed, 59 insertions, 0 deletions
diff --git a/libbpkg/package-name.cxx b/libbpkg/package-name.cxx
new file mode 100644
index 0000000..c90d861
--- /dev/null
+++ b/libbpkg/package-name.cxx
@@ -0,0 +1,59 @@
+// file      : libbpkg/package-name.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2018 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <libbpkg/package-name.hxx>
+
+#include <string>
+#include <vector>
+#include <utility>   // move()
+#include <algorithm> // find()
+#include <stdexcept> // invalid_argument
+
+#include <libbutl/utility.mxx> // alpha(), alnum()
+
+using namespace std;
+using namespace butl;
+
+namespace bpkg
+{
+  // package_name
+  //
+  static const vector<string> illegal_pkg_names ({
+      "build",
+      "con", "prn", "aux", "nul",
+      "com1", "com2", "com3", "com4", "com5", "com6", "com7", "com8", "com9",
+      "lpt1", "lpt2", "lpt3", "lpt4", "lpt5", "lpt6", "lpt7", "lpt8", "lpt9"});
+
+  static const string legal_pkg_chars ("_+-.");
+
+  package_name::
+  package_name (std::string&& nm)
+  {
+    if (nm.size () < 2)
+      throw invalid_argument ("length is less than two characters");
+
+    if (find (illegal_pkg_names.begin (), illegal_pkg_names.end (), nm) !=
+        illegal_pkg_names.end ())
+      throw invalid_argument ("illegal name");
+
+    if (!alpha (nm.front ()))
+      throw invalid_argument ("illegal first character (must be alphabetic)");
+
+    // Here we rely on the fact that the name length >= 2.
+    //
+    for (auto i (nm.cbegin () + 1), e (nm.cend () - 1); i != e; ++i)
+    {
+      char c (*i);
+
+      if (!(alnum(c) || legal_pkg_chars.find (c) != string::npos))
+        throw invalid_argument ("illegal character");
+    }
+
+    if (!alnum (nm.back ()))
+      throw invalid_argument (
+        "illegal last character (must be alphabetic or digit)");
+
+    value_ = move (nm);
+  }
+}