From 8e761289a2446367267c6c0d9a26e734f0f78306 Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Wed, 16 Dec 2020 20:29:05 +0300
Subject: Get rid of legacy build systems and rename cutl/ to libcutl/

---
 libcutl/re.hxx | 280 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 280 insertions(+)
 create mode 100644 libcutl/re.hxx

(limited to 'libcutl/re.hxx')

diff --git a/libcutl/re.hxx b/libcutl/re.hxx
new file mode 100644
index 0000000..15b153c
--- /dev/null
+++ b/libcutl/re.hxx
@@ -0,0 +1,280 @@
+// file      : libcutl/re.hxx
+// license   : MIT; see accompanying LICENSE file
+
+#ifndef LIBCUTL_RE_HXX
+#define LIBCUTL_RE_HXX
+
+#include <string>
+#include <ostream>
+
+#include <libcutl/exception.hxx>
+
+#include <libcutl/export.hxx>
+
+namespace cutl
+{
+  namespace re
+  {
+    struct LIBCUTL_EXPORT format_base: exception
+    {
+      format_base (std::string const& d): description_ (d) {}
+      ~format_base () noexcept {}
+
+      std::string const&
+      description () const
+      {
+        return description_;
+      }
+
+      virtual char const*
+      what () const noexcept;
+
+    protected:
+      std::string description_;
+    };
+
+    template <typename C>
+    struct basic_format: format_base
+    {
+      basic_format (std::basic_string<C> const& e, std::string const& d)
+          : format_base (d), regex_ (e) {}
+      ~basic_format () noexcept {}
+
+      std::basic_string<C> const&
+      regex () const
+      {
+        return regex_;
+      }
+
+    private:
+      std::basic_string<C> regex_;
+    };
+
+    typedef basic_format<char> format;
+    typedef basic_format<wchar_t> wformat;
+
+    // Regular expression pattern.
+    //
+    template <typename C>
+    struct basic_regex
+    {
+      typedef std::basic_string<C> string_type;
+
+      ~basic_regex ();
+
+      basic_regex (): impl_ (0) {init (0, false);}
+
+      explicit
+      basic_regex (string_type const& s, bool icase = false)
+          : impl_ (0)
+      {
+        init (&s, icase);
+      }
+
+      basic_regex&
+      operator= (string_type const& s)
+      {
+        init (&s, false);
+        return *this;
+      }
+
+      basic_regex&
+      assign (string_type const& s, bool icase = false)
+      {
+        init (&s, icase);
+        return *this;
+      }
+
+      basic_regex (basic_regex const&);
+
+      basic_regex&
+      operator= (basic_regex const&);
+
+    public:
+      bool
+      match (string_type const&) const;
+
+      bool
+      search (string_type const&) const;
+
+      string_type
+      replace (string_type const& s,
+               string_type const& sub,
+               bool first_only = false) const;
+
+    public:
+      string_type const&
+      str () const
+      {
+        return str_;
+      }
+
+      bool
+      empty () const
+      {
+        return str_.empty ();
+      }
+
+    private:
+      void
+      init (string_type const*, bool);
+
+    private:
+      struct impl;
+
+      string_type str_; // Text representation of regex.
+      impl* impl_;
+    };
+
+    template <typename C>
+    inline std::basic_ostream<C>&
+    operator<< (std::basic_ostream<C>& os, basic_regex<C> const& r)
+    {
+      return os << r.str ();
+    }
+
+    typedef basic_regex<char> regex;
+    typedef basic_regex<wchar_t> wregex;
+
+    // Regular expression pattern and substituation.
+    //
+    template <typename C>
+    struct basic_regexsub
+    {
+      typedef basic_regex<C> regex_type;
+      typedef std::basic_string<C> string_type;
+
+      basic_regexsub () {}
+
+      // Expression is of the form /regex/substitution/ where '/' can
+      // be replaced with any delimiter. Delimiters must be escaped in
+      // regex and substitution using back slashes (e.g., "\/"). Back
+      // slashes themselves can be escaped using the double back slash
+      // sequence (e.g., "\\").
+      //
+      explicit
+      basic_regexsub (string_type const& e) {init (e);}
+
+      basic_regexsub (string_type const& regex, string_type const& sub)
+          : regex_ (regex), sub_ (sub)
+      {
+      }
+
+      basic_regexsub (regex_type const& regex, string_type const& sub)
+          : regex_ (regex), sub_ (sub)
+      {
+      }
+
+      basic_regexsub&
+      operator= (string_type const& e)
+      {
+        init (e);
+        return *this;
+      }
+
+    public:
+      bool
+      match (string_type const& s) const
+      {
+        return regex_.match (s);
+      }
+
+      bool
+      search (string_type const& s) const
+      {
+        return regex_.search (s);
+      }
+
+      string_type
+      replace (string_type const& s, bool first_only = false) const
+      {
+        return regex_.replace (s, sub_, first_only);
+      }
+
+    public:
+      const regex_type&
+      regex () const
+      {
+        return regex_;
+      }
+
+      const string_type&
+      substitution () const
+      {
+        return sub_;
+      }
+
+      bool
+      empty () const
+      {
+        return sub_.empty () && regex_.empty ();
+      }
+
+    private:
+      void
+      init (string_type const&);
+
+    private:
+      regex_type regex_;
+      string_type sub_;
+    };
+
+    typedef basic_regexsub<char> regexsub;
+    typedef basic_regexsub<wchar_t> wregexsub;
+
+    // Once-off regex execution.
+    //
+    template <typename C>
+    inline bool
+    match (std::basic_string<C> const& s, std::basic_string<C> const& regex)
+    {
+      basic_regex<C> r (regex);
+      return r.match (s);
+    }
+
+    template <typename C>
+    inline bool
+    search (std::basic_string<C> const& s, std::basic_string<C> const& regex)
+    {
+      basic_regex<C> r (regex);
+      return r.search (s);
+    }
+
+    template <typename C>
+    inline std::basic_string<C>
+    replace (std::basic_string<C> const& s,
+             std::basic_string<C> const& regex,
+             std::basic_string<C> const& sub,
+             bool first_only = false)
+    {
+      basic_regex<C> r (regex);
+      return r.replace (s, sub, first_only);
+    }
+
+    template <typename C>
+    inline std::basic_string<C>
+    replace (std::basic_string<C> const& s,
+             std::basic_string<C> const& regexsub, // /regex/subst/
+             bool first_only = false)
+    {
+      basic_regexsub<C> r (regexsub);
+      return r.replace (s, first_only);
+    }
+
+    // Utility function for parsing expressions in the form /regex/subst/
+    // where '/' can be replaced with any delimiter. This function handles
+    // escaping. It return the position of the next delimiter and stores
+    // the unescaped chunk in result or throws the format exception if
+    // the expression is invalid.
+    //
+    template <typename C>
+    typename std::basic_string<C>::size_type
+    parse (std::basic_string<C> const& s,
+           typename std::basic_string<C>::size_type start,
+           std::basic_string<C>& result);
+  }
+}
+
+#include <libcutl/re/re.txx>
+
+#endif // LIBCUTL_RE_HXX
-- 
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