Add to git.

1 files changed, 156 insertions, 0 deletions

diff --git a/pkgconfig.cpp b/pkgconfig.cpp
new file mode 100644
index 0000000..8481140
--- /dev/null
+++ b/pkgconfig.cpp
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+/*
+ * Copyright (c) 2011, Chris Johns <chrisj@rtems.org> 
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <algorithm>
+#include <fstream>
+#include <string>
+
+#include <pkgconfig.h>
+
+namespace pkgconfig
+{
+  void tolower (std::string& str)
+  {
+    std::transform (str.begin (), str.end (), str.begin (), ::tolower);
+  }
+
+  package::package (void)
+  {
+  }
+
+  void
+  package::load (const std::string& name)
+  {
+    std::ifstream in (name.c_str (), std::ios::in);
+
+    while (!in.eof ())
+    {
+      char buffer[1024];
+
+      in.getline (buffer, sizeof (buffer));
+      
+      std::string line (buffer);
+      size_t      hash;
+
+      hash = line.find ('#');
+      if (hash != std::string::npos)
+        line.erase(hash);
+
+      if (line.size () > 0)
+      {
+        size_t eq = line.find_first_of ('=');
+        size_t dd = line.find_first_of (':');
+
+        size_t d = std::string::npos;
+        bool   def = false;
+
+        if ((eq != std::string::npos) && (dd != std::string::npos))
+        {
+          if (eq < dd)
+          {
+            d = eq;
+            def = true;
+          }
+          else
+          {
+            d = dd;
+            def = false;
+          }
+        }
+        else if (eq != std::string::npos)
+        {
+          d = eq;
+          def = true;
+        }
+        else if (dd != std::string::npos)
+        {
+          d = dd;
+          def = false;
+        }
+
+        if (d != std::string::npos)
+        {
+          std::string lhs = line.substr (0, d);
+          std::string rhs = line.substr (d + 1);
+
+          tolower (lhs);
+
+          if (def)
+            defines[lhs] = rhs;
+          else
+            fields[lhs] = rhs;
+        }
+      }
+    }
+
+    in.close ();
+  }
+
+  bool
+  package::get (const std::string& label, std::string& result)
+  {
+    result.erase ();
+
+    std::string ll = label;
+    tolower (ll);
+    
+    table::iterator ti = fields.find (ll);
+    
+    if (ti == fields.end ())
+      return false;
+
+    /*
+     * Take a copy so we can expand the macros in it.
+     */
+    std::string s = ti->second;
+
+    /*
+     * Loop until there is nothing more to expand.
+     */
+    bool expanded = true;
+    while (expanded)
+    {        
+      /*
+       * Need to perform a regular expression search for '\$\{[^\}]+\}'. This
+       * means look for every '${' then accept any character that is not a '}'
+       * and finish with a '}'.
+       */
+      size_t p = 0;
+      while (p < s.length ())
+      {
+        /*
+         * Find the start and end of the label.
+         */
+        size_t ms = s.find ("${", p);
+        if (ms != std::string::npos)
+        {
+          size_t me = s.find ('}', ms);
+          if (me != std::string::npos)
+          {
+            std::string ml = s.substr (ms, me);
+            
+          }
+        }
+        else
+        {
+          p = s.length ();
+        }
+      }
+    }
+    
+    return true;
+  }
+}