merge patch from Daniel Hartwig to Show a error message if {,dist-}upgrade is used...

[apt.git] / apt-pkg / contrib / configuration.cc

diff --git a/apt-pkg/contrib/configuration.cc b/apt-pkg/contrib/configuration.cc
index 82418f9c25de1b1e4e3551346fd4244cc79f18c2..31cd9f8adc25efa0a4d6cf9a3bfd2f3a5105ee3b 100644 (file)
--- a/apt-pkg/contrib/configuration.cc
+++ b/apt-pkg/contrib/configuration.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/

-// $Id: configuration.cc,v 1.7 1998/10/20 02:39:26 jgg Exp $
+// $Id: configuration.cc,v 1.28 2004/04/30 04:00:15 mdz Exp $

 /* ######################################################################
 
    Configuration Class
 /* ######################################################################
 
    Configuration Class


@@ -8,19 +8,27 @@
    This class provides a configuration file and command line parser
    for a tree-oriented configuration environment. All runtime configuration
    is stored in here.
    This class provides a configuration file and command line parser
    for a tree-oriented configuration environment. All runtime configuration
    is stored in here.

+
+   This source is placed in the Public Domain, do with it what you will
+   It was originally written by Jason Gunthorpe <jgg@debian.org>.

    
    ##################################################################### */
                                                                        /*}}}*/
 // Include files                                                       /*{{{*/
    
    ##################################################################### */
                                                                        /*}}}*/
 // Include files                                                       /*{{{*/

-#ifdef __GNUG__
-#pragma implementation "apt-pkg/configuration.h"
-#endif
+#include <config.h>
+

 #include <apt-pkg/configuration.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/error.h>

-#include <strutl.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/fileutl.h>
+
+#include <vector>
+#include <fstream>
+#include <iostream>

 
 

-#include <stdio.h>
-#include <fstream.h>
+#include <apti18n.h>
+
+using namespace std;

                                                                        /*}}}*/
 
 Configuration *_config = new Configuration;
                                                                        /*}}}*/
 
 Configuration *_config = new Configuration;


@@ -28,32 +36,75 @@ Configuration *_config = new Configuration;
 // Configuration::Configuration - Constructor                          /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // Configuration::Configuration - Constructor                          /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-Configuration::Configuration()
+Configuration::Configuration() : ToFree(true)

 {
    Root = new Item;
 {
    Root = new Item;

+}
+Configuration::Configuration(const Item *Root) : Root((Item *)Root), ToFree(false)
+{
+};
+
+                                                                       /*}}}*/
+// Configuration::~Configuration - Destructor                          /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+Configuration::~Configuration()
+{
+   if (ToFree == false)
+      return;
+   
+   Item *Top = Root;
+   for (; Top != 0;)
+   {
+      if (Top->Child != 0)
+      {
+        Top = Top->Child;
+        continue;
+      }
+            
+      while (Top != 0 && Top->Next == 0)
+      {
+        Item *Parent = Top->Parent;
+        delete Top;
+        Top = Parent;
+      }      
+      if (Top != 0)
+      {
+        Item *Next = Top->Next;
+        delete Top;
+        Top = Next;
+      }
+   }

 }
                                                                        /*}}}*/
 }
                                                                        /*}}}*/

-// Configuration::Lookup - Lookup a single item                                                                        /*{{{*/
+// Configuration::Lookup - Lookup a single item                                /*{{{*/

 // ---------------------------------------------------------------------
 /* This will lookup a single item by name below another item. It is a 
    helper function for the main lookup function */
 Configuration::Item *Configuration::Lookup(Item *Head,const char *S,
 // ---------------------------------------------------------------------
 /* This will lookup a single item by name below another item. It is a 
    helper function for the main lookup function */
 Configuration::Item *Configuration::Lookup(Item *Head,const char *S,

-                                          unsigned long Len,bool Create)
+                                          unsigned long const &Len,bool const &Create)

 {
    int Res = 1;
    Item *I = Head->Child;
    Item **Last = &Head->Child;
 {
    int Res = 1;
    Item *I = Head->Child;
    Item **Last = &Head->Child;

-   for (; I != 0; Last = &I->Next, I = I->Next)
-      if ((Res = stringcasecmp(I->Tag.begin(),I->Tag.end(),S,S + Len)) == 0)
-        break;

    
    

+   // Empty strings match nothing. They are used for lists.
+   if (Len != 0)
+   {
+      for (; I != 0; Last = &I->Next, I = I->Next)
+        if ((Res = stringcasecmp(I->Tag,S,S + Len)) == 0)
+           break;
+   }
+   else
+      for (; I != 0; Last = &I->Next, I = I->Next);
+      

    if (Res == 0)
       return I;
    if (Create == false)
       return 0;
    
    I = new Item;
    if (Res == 0)
       return I;
    if (Create == false)
       return 0;
    
    I = new Item;

-   I->Tag = string(S,Len);
+   I->Tag.assign(S,Len);

    I->Next = *Last;
    I->Parent = Head;
    *Last = I;
    I->Next = *Last;
    I->Parent = Head;
    *Last = I;


@@ -64,13 +115,16 @@ Configuration::Item *Configuration::Lookup(Item *Head,const char *S,
 // ---------------------------------------------------------------------
 /* This performs a fully scoped lookup of a given name, possibly creating
    new items */
 // ---------------------------------------------------------------------
 /* This performs a fully scoped lookup of a given name, possibly creating
    new items */

-Configuration::Item *Configuration::Lookup(const char *Name,bool Create)
+Configuration::Item *Configuration::Lookup(const char *Name,bool const &Create)

 {
 {

+   if (Name == 0)
+      return Root->Child;
+   

    const char *Start = Name;
    const char *End = Start + strlen(Name);
    const char *TagEnd = Name;
    Item *Itm = Root;
    const char *Start = Name;
    const char *End = Start + strlen(Name);
    const char *TagEnd = Name;
    Item *Itm = Root;

-   for (; End - TagEnd > 2; TagEnd++)
+   for (; End - TagEnd >= 2; TagEnd++)

    {
       if (TagEnd[0] == ':' && TagEnd[1] == ':')
       {
    {
       if (TagEnd[0] == ':' && TagEnd[1] == ':')
       {


@@ -81,6 +135,13 @@ Configuration::Item *Configuration::Lookup(const char *Name,bool Create)
       }
    }   
 
       }
    }   
 

+   // This must be a trailing ::, we create unique items in a list
+   if (End - Start == 0)
+   {
+      if (Create == false)
+        return 0;
+   }
+   

    Itm = Lookup(Itm,Start,End - Start,Create);
    return Itm;
 }
    Itm = Lookup(Itm,Start,End - Start,Create);
    return Itm;
 }


@@ -88,13 +149,13 @@ Configuration::Item *Configuration::Lookup(const char *Name,bool Create)
 // Configuration::Find - Find a value                                  /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // Configuration::Find - Find a value                                  /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-string Configuration::Find(const char *Name,const char *Default)
+string Configuration::Find(const char *Name,const char *Default) const

 {
 {

-   Item *Itm = Lookup(Name,false);
+   const Item *Itm = Lookup(Name);

    if (Itm == 0 || Itm->Value.empty() == true)
    {
       if (Default == 0)
    if (Itm == 0 || Itm->Value.empty() == true)
    {
       if (Default == 0)

-        return string();
+        return "";

       else
         return Default;
    }
       else
         return Default;
    }


@@ -107,50 +168,106 @@ string Configuration::Find(const char *Name,const char *Default)
 /* Directories are stored as the base dir in the Parent node and the
    sub directory in sub nodes with the final node being the end filename
  */
 /* Directories are stored as the base dir in the Parent node and the
    sub directory in sub nodes with the final node being the end filename
  */

-string Configuration::FindFile(const char *Name,const char *Default)
+string Configuration::FindFile(const char *Name,const char *Default) const

 {
 {

-   Item *Itm = Lookup(Name,false);
+   const Item *RootItem = Lookup("RootDir");
+   std::string result =  (RootItem == 0) ? "" : RootItem->Value;
+   if(result.empty() == false && result[result.size() - 1] != '/')
+     result.push_back('/');
+
+   const Item *Itm = Lookup(Name);

    if (Itm == 0 || Itm->Value.empty() == true)
    {
    if (Itm == 0 || Itm->Value.empty() == true)
    {

-      if (Default == 0)
-        return string();
-      else
-        return Default;
+      if (Default != 0)
+        result.append(Default);

    }
    }

-   
-   // Absolute path
-   if (Itm->Value[0] == '/' || Itm->Parent == 0)
-      return Itm->Value;
-   
-   // ./ is also considered absolute as is anything with ~ in it
-   if (Itm->Value[0] != 0 && 
-       ((Itm->Value[0] == '.' && Itm->Value[1] == '/') ||
-       (Itm->Value[0] == '~' && Itm->Value[1] == '/')))
-      return Itm->Value;
-   
-   if (Itm->Parent->Value.end()[-1] == '/')
-      return Itm->Parent->Value + Itm->Value;

    else
    else

-      return Itm->Parent->Value + '/' + Itm->Value;
+   {
+      string val = Itm->Value;
+      while (Itm->Parent != 0)
+      {
+        if (Itm->Parent->Value.empty() == true)
+        {
+           Itm = Itm->Parent;
+           continue;
+        }
+
+        // Absolute
+        if (val.length() >= 1 && val[0] == '/')
+        {
+           if (val.compare(0, 9, "/dev/null") == 0)
+              val.erase(9);
+           break;
+        }
+
+        // ~/foo or ./foo
+        if (val.length() >= 2 && (val[0] == '~' || val[0] == '.') && val[1] == '/')
+           break;
+
+        // ../foo
+        if (val.length() >= 3 && val[0] == '.' && val[1] == '.' && val[2] == '/')
+           break;
+
+        if (Itm->Parent->Value.end()[-1] != '/')
+           val.insert(0, "/");
+
+        val.insert(0, Itm->Parent->Value);
+        Itm = Itm->Parent;
+      }
+      result.append(val);
+   }
+
+   // do some normalisation by removing // and /./ from the path
+   size_t found = string::npos;
+   while ((found = result.find("/./")) != string::npos)
+      result.replace(found, 3, "/");
+   while ((found = result.find("//")) != string::npos)
+      result.replace(found, 2, "/");
+
+   return result;

 }
                                                                        /*}}}*/
 // Configuration::FindDir - Find a directory name                      /*{{{*/
 // ---------------------------------------------------------------------
 /* This is like findfile execept the result is terminated in a / */
 }
                                                                        /*}}}*/
 // Configuration::FindDir - Find a directory name                      /*{{{*/
 // ---------------------------------------------------------------------
 /* This is like findfile execept the result is terminated in a / */

-string Configuration::FindDir(const char *Name,const char *Default)
+string Configuration::FindDir(const char *Name,const char *Default) const

 {
    string Res = FindFile(Name,Default);
    if (Res.end()[-1] != '/')
 {
    string Res = FindFile(Name,Default);
    if (Res.end()[-1] != '/')

+   {
+      size_t const found = Res.rfind("/dev/null");
+      if (found != string::npos && found == Res.size() - 9)
+        return Res; // /dev/null returning

       return Res + '/';
       return Res + '/';

+   }

    return Res;
 }
                                                                        /*}}}*/
    return Res;
 }
                                                                        /*}}}*/

+// Configuration::FindVector - Find a vector of values                 /*{{{*/
+// ---------------------------------------------------------------------
+/* Returns a vector of config values under the given item */
+vector<string> Configuration::FindVector(const char *Name) const
+{
+   vector<string> Vec;
+   const Item *Top = Lookup(Name);
+   if (Top == NULL)
+      return Vec;
+
+   Item *I = Top->Child;
+   while(I != NULL)
+   {
+      Vec.push_back(I->Value);
+      I = I->Next;
+   }
+   return Vec;
+}
+                                                                       /*}}}*/

 // Configuration::FindI - Find an integer value                                /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // Configuration::FindI - Find an integer value                                /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-int Configuration::FindI(const char *Name,int Default)
+int Configuration::FindI(const char *Name,int const &Default) const

 {
 {

-   Item *Itm = Lookup(Name,false);
+   const Item *Itm = Lookup(Name);

    if (Itm == 0 || Itm->Value.empty() == true)
       return Default;
    
    if (Itm == 0 || Itm->Value.empty() == true)
       return Default;
    


@@ -165,19 +282,85 @@ int Configuration::FindI(const char *Name,int Default)
 // Configuration::FindB - Find a boolean type                          /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // Configuration::FindB - Find a boolean type                          /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-bool Configuration::FindB(const char *Name,bool Default)
+bool Configuration::FindB(const char *Name,bool const &Default) const

 {
 {

-   Item *Itm = Lookup(Name,false);
+   const Item *Itm = Lookup(Name);

    if (Itm == 0 || Itm->Value.empty() == true)
       return Default;
    
    return StringToBool(Itm->Value,Default);
 }
                                                                        /*}}}*/
    if (Itm == 0 || Itm->Value.empty() == true)
       return Default;
    
    return StringToBool(Itm->Value,Default);
 }
                                                                        /*}}}*/

+// Configuration::FindAny - Find an arbitrary type                     /*{{{*/
+// ---------------------------------------------------------------------
+/* a key suffix of /f, /d, /b or /i calls Find{File,Dir,B,I} */
+string Configuration::FindAny(const char *Name,const char *Default) const
+{
+   string key = Name;
+   char type = 0;
+
+   if (key.size() > 2 && key.end()[-2] == '/')
+   {
+      type = key.end()[-1];
+      key.resize(key.size() - 2);
+   }
+
+   switch (type)
+   {
+      // file
+      case 'f': 
+      return FindFile(key.c_str(), Default);
+      
+      // directory
+      case 'd': 
+      return FindDir(key.c_str(), Default);
+      
+      // bool
+      case 'b': 
+      return FindB(key, Default) ? "true" : "false";
+      
+      // int
+      case 'i': 
+      {
+        char buf[16];
+        snprintf(buf, sizeof(buf)-1, "%d", FindI(key, Default ? atoi(Default) : 0 ));
+        return buf;
+      }
+   }
+
+   // fallback
+   return Find(Name, Default);
+}
+                                                                       /*}}}*/
+// Configuration::CndSet - Conditinal Set a value                      /*{{{*/
+// ---------------------------------------------------------------------
+/* This will not overwrite */
+void Configuration::CndSet(const char *Name,const string &Value)
+{
+   Item *Itm = Lookup(Name,true);
+   if (Itm == 0)
+      return;
+   if (Itm->Value.empty() == true)
+      Itm->Value = Value;
+}
+                                                                       /*}}}*/
+// Configuration::Set - Set an integer value                           /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void Configuration::CndSet(const char *Name,int const Value)
+{
+   Item *Itm = Lookup(Name,true);
+   if (Itm == 0 || Itm->Value.empty() == false)
+      return;
+   char S[300];
+   snprintf(S,sizeof(S),"%i",Value);
+   Itm->Value = S;
+}
+                                                                       /*}}}*/

 // Configuration::Set - Set a value                                    /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // Configuration::Set - Set a value                                    /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-void Configuration::Set(const char *Name,string Value)
+void Configuration::Set(const char *Name,const string &Value)

 {
    Item *Itm = Lookup(Name,true);
    if (Itm == 0)
 {
    Item *Itm = Lookup(Name,true);
    if (Itm == 0)


@@ -188,7 +371,7 @@ void Configuration::Set(const char *Name,string Value)
 // Configuration::Set - Set an integer value                           /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // Configuration::Set - Set an integer value                           /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-void Configuration::Set(const char *Name,int Value)
+void Configuration::Set(const char *Name,int const &Value)

 {
    Item *Itm = Lookup(Name,true);
    if (Itm == 0)
 {
    Item *Itm = Lookup(Name,true);
    if (Itm == 0)


@@ -198,31 +381,244 @@ void Configuration::Set(const char *Name,int Value)
    Itm->Value = S;
 }
                                                                        /*}}}*/
    Itm->Value = S;
 }
                                                                        /*}}}*/

+// Configuration::Clear - Clear an single value from a list            /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void Configuration::Clear(string const &Name, int const &Value)
+{
+   char S[300];
+   snprintf(S,sizeof(S),"%i",Value);
+   Clear(Name, S);
+}
+                                                                       /*}}}*/
+// Configuration::Clear - Clear an single value from a list            /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void Configuration::Clear(string const &Name, string const &Value)
+{
+   Item *Top = Lookup(Name.c_str(),false);
+   if (Top == 0 || Top->Child == 0)
+      return;
+
+   Item *Tmp, *Prev, *I;
+   Prev = I = Top->Child;
+
+   while(I != NULL)
+   {
+      if(I->Value == Value)
+      {
+        Tmp = I;
+        // was first element, point parent to new first element
+        if(Top->Child == Tmp)
+           Top->Child = I->Next;
+        I = I->Next;
+        Prev->Next = I;
+        delete Tmp;
+      } else {
+        Prev = I;
+        I = I->Next;
+      }
+   }
+     
+}
+                                                                       /*}}}*/
+// Configuration::Clear - Clear everything                             /*{{{*/
+// ---------------------------------------------------------------------
+void Configuration::Clear()
+{
+   const Configuration::Item *Top = Tree(0);
+   while( Top != 0 )
+   {
+      Clear(Top->FullTag());
+      Top = Top->Next;
+   }
+}
+                                                                       /*}}}*/
+// Configuration::Clear - Clear an entire tree                         /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void Configuration::Clear(string const &Name)
+{
+   Item *Top = Lookup(Name.c_str(),false);
+   if (Top == 0) 
+      return;
+
+   Top->Value.clear();
+   Item *Stop = Top;
+   Top = Top->Child;
+   Stop->Child = 0;
+   for (; Top != 0;)
+   {
+      if (Top->Child != 0)
+      {
+        Top = Top->Child;
+        continue;
+      }
+
+      while (Top != 0 && Top->Next == 0)
+      {
+        Item *Tmp = Top;
+        Top = Top->Parent;
+        delete Tmp;
+        
+        if (Top == Stop)
+           return;
+      }
+      
+      Item *Tmp = Top;
+      if (Top != 0)
+        Top = Top->Next;
+      delete Tmp;
+   }
+}
+                                                                       /*}}}*/

 // Configuration::Exists - Returns true if the Name exists             /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // Configuration::Exists - Returns true if the Name exists             /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-bool Configuration::Exists(const char *Name)
+bool Configuration::Exists(const char *Name) const

 {
 {

-   Item *Itm = Lookup(Name,false);
+   const Item *Itm = Lookup(Name);

    if (Itm == 0)
       return false;
    return true;
 }
                                                                        /*}}}*/
    if (Itm == 0)
       return false;
    return true;
 }
                                                                        /*}}}*/

+// Configuration::ExistsAny - Returns true if the Name, possibly       /*{{{*/
+// ---------------------------------------------------------------------
+/* qualified by /[fdbi] exists */
+bool Configuration::ExistsAny(const char *Name) const
+{
+   string key = Name;
+
+   if (key.size() > 2 && key.end()[-2] == '/')
+   {
+      if (key.find_first_of("fdbi",key.size()-1) < key.size())
+      {
+         key.resize(key.size() - 2);
+         if (Exists(key.c_str()))
+            return true;
+      }
+      else
+      {
+         _error->Warning(_("Unrecognized type abbreviation: '%c'"), key.end()[-3]);
+      }
+   }
+   return Exists(Name);
+}
+                                                                       /*}}}*/
+// Configuration::Dump - Dump the config                               /*{{{*/
+// ---------------------------------------------------------------------
+/* Dump the entire configuration space */
+void Configuration::Dump(ostream& str)
+{
+   Dump(str, NULL, "%f \"%v\";\n", true);
+}
+void Configuration::Dump(ostream& str, char const * const root,
+                        char const * const formatstr, bool const emptyValue)
+{
+   const Configuration::Item* Top = Tree(root);
+   if (Top == 0)
+      return;
+   const Configuration::Item* const Root = (root == NULL) ? NULL : Top;
+   std::vector<std::string> const format = VectorizeString(formatstr, '%');
+
+   /* Write out all of the configuration directives by walking the
+      configuration tree */
+   do {
+      if (emptyValue == true || Top->Value.empty() == emptyValue)
+      {
+        std::vector<std::string>::const_iterator f = format.begin();
+        str << *f;
+        for (++f; f != format.end(); ++f)
+        {
+           if (f->empty() == true)
+           {
+              ++f;
+              str << '%' << *f;
+              continue;
+           }
+           char const type = (*f)[0];
+           if (type == 'f')
+              str << Top->FullTag();
+           else if (type == 't')
+              str << Top->Tag;
+           else if (type == 'v')
+              str << Top->Value;
+           else if (type == 'F')
+              str << QuoteString(Top->FullTag(), "=\"\n");
+           else if (type == 'T')
+              str << QuoteString(Top->Tag, "=\"\n");
+           else if (type == 'V')
+              str << QuoteString(Top->Value, "=\"\n");
+           else if (type == 'n')
+              str << "\n";
+           else if (type == 'N')
+              str << "\t";
+           else
+              str << '%' << type;
+           str << f->c_str() + 1;
+        }
+      }
+
+      if (Top->Child != 0)
+      {
+        Top = Top->Child;
+        continue;
+      }
+
+      while (Top != 0 && Top->Next == 0)
+        Top = Top->Parent;
+      if (Top != 0)
+        Top = Top->Next;
+
+      if (Root != NULL)
+      {
+        const Configuration::Item* I = Top;
+        while(I != 0)
+        {
+           if (I == Root)
+              break;
+           else
+              I = I->Parent;
+        }
+        if (I == 0)
+           break;
+      }
+   } while (Top != 0);
+}
+                                                                       /*}}}*/
+
+// Configuration::Item::FullTag - Return the fully scoped tag          /*{{{*/
+// ---------------------------------------------------------------------
+/* Stop sets an optional max recursion depth if this item is being viewed as
+   part of a sub tree. */
+string Configuration::Item::FullTag(const Item *Stop) const
+{
+   if (Parent == 0 || Parent->Parent == 0 || Parent == Stop)
+      return Tag;
+   return Parent->FullTag(Stop) + "::" + Tag;
+}
+                                                                       /*}}}*/

 
 // ReadConfigFile - Read a configuration file                          /*{{{*/
 // ---------------------------------------------------------------------
 /* The configuration format is very much like the named.conf format
 
 // ReadConfigFile - Read a configuration file                          /*{{{*/
 // ---------------------------------------------------------------------
 /* The configuration format is very much like the named.conf format

-   used in bind8, in fact this routine can parse most named.conf files. */
-bool ReadConfigFile(Configuration &Conf,string FName)
-{
+   used in bind8, in fact this routine can parse most named.conf files. 
+   Sectional config files are like bind's named.conf where there are 
+   sections like 'zone "foo.org" { .. };' This causes each section to be
+   added in with a tag like "zone::foo.org" instead of being split 
+   tag/value. AsSectional enables Sectional parsing.*/
+bool ReadConfigFile(Configuration &Conf,const string &FName,bool const &AsSectional,
+                   unsigned const &Depth)
+{   

    // Open the stream for reading
    // Open the stream for reading

-   ifstream F(FName.c_str(),ios::in | ios::nocreate);
+   ifstream F(FName.c_str(),ios::in); 

    if (!F != 0)
    if (!F != 0)

-      return _error->Errno("ifstream::ifstream","Opening configuration file %s",FName.c_str());
-   
-   char Buffer[300];
+      return _error->Errno("ifstream::ifstream",_("Opening configuration file %s"),FName.c_str());
+

    string LineBuffer;
    string LineBuffer;

+   string Stack[100];
+   unsigned int StackPos = 0;

    
    // Parser state
    string ParentTag;
    
    // Parser state
    string ParentTag;


@@ -231,19 +627,64 @@ bool ReadConfigFile(Configuration &Conf,string FName)
    bool InComment = false;
    while (F.eof() == false)
    {
    bool InComment = false;
    while (F.eof() == false)
    {

-      F.getline(Buffer,sizeof(Buffer));
+      // The raw input line.
+      std::string Input;
+      // The input line with comments stripped.
+      std::string Fragment;
+
+      // Grab the next line of F and place it in Input.
+      do
+       {
+         char *Buffer = new char[1024];
+
+         F.clear();
+         F.getline(Buffer,sizeof(Buffer) / 2);
+
+         Input += Buffer;
+         delete[] Buffer;
+       }
+      while (F.fail() && !F.eof());
+
+      // Expand tabs in the input line and remove leading and trailing
+      // whitespace.
+      {
+       const int BufferSize = Input.size() * 8 + 1;
+       char *Buffer = new char[BufferSize];
+       try
+         {
+           memcpy(Buffer, Input.c_str(), Input.size() + 1);
+
+           _strtabexpand(Buffer, BufferSize);
+           _strstrip(Buffer);
+           Input = Buffer;
+         }
+       catch(...)
+         {
+           delete[] Buffer;
+           throw;
+         }
+       delete[] Buffer;
+      }

       CurLine++;
       CurLine++;

-      _strtabexpand(Buffer,sizeof(Buffer));
-      _strstrip(Buffer);
+
+      // Now strip comments; if the whole line is contained in a
+      // comment, skip this line.
+
+      // The first meaningful character in the current fragment; will
+      // be adjusted below as we remove bytes from the front.
+      std::string::const_iterator Start = Input.begin();
+      // The last meaningful character in the current fragment.
+      std::string::const_iterator End = Input.end();

 
       // Multi line comment
       if (InComment == true)
       {
 
       // Multi line comment
       if (InComment == true)
       {

-        for (const char *I = Buffer; *I != 0; I++)
+       for (std::string::const_iterator I = Start;
+            I != End; ++I)

         {
         {

-           if (*I == '*' && I[1] == '/')
+           if (*I == '*' && I + 1 != End && I[1] == '/')

            {
            {

-              memmove(Buffer,I+2,strlen(I+2) + 1);
+              Start = I + 2;

               InComment = false;
               break;
            }       
               InComment = false;
               break;
            }       


@@ -253,142 +694,311 @@ bool ReadConfigFile(Configuration &Conf,string FName)
       }
       
       // Discard single line comments
       }
       
       // Discard single line comments

-      for (char *I = Buffer; *I != 0; I++)
+      bool InQuote = false;
+      for (std::string::const_iterator I = Start;
+          I != End; ++I)

       {
       {

-        if (*I == '/' && I[1] == '/')
-         {
-           *I = 0;
+        if (*I == '"')
+           InQuote = !InQuote;
+        if (InQuote == true)
+           continue;
+
+        if ((*I == '/' && I + 1 != End && I[1] == '/') ||
+            (*I == '#' && strcmp(string(I,I+6).c_str(),"#clear") != 0 &&
+             strcmp(string(I,I+8).c_str(),"#include") != 0))
+        {
+           End = I;

            break;
         }
       }
            break;
         }
       }

-      
-      // Look for multi line comments
-      for (char *I = Buffer; *I != 0; I++)
+
+      // Look for multi line comments and build up the
+      // fragment.
+      Fragment.reserve(End - Start);
+      InQuote = false;
+      for (std::string::const_iterator I = Start;
+          I != End; ++I)

       {
       {

-        if (*I == '/' && I[1] == '*')
+        if (*I == '"')
+           InQuote = !InQuote;
+        if (InQuote == true)
+          Fragment.push_back(*I);
+        else if (*I == '/' && I + 1 != End && I[1] == '*')

          {
            InComment = true;
          {
            InComment = true;

-           for (char *J = Buffer; *J != 0; J++)
+           for (std::string::const_iterator J = I;
+                J != End; ++J)

            {
            {

-              if (*J == '*' && J[1] == '/')
+              if (*J == '*' && J + 1 != End && J[1] == '/')

               {
               {

-                 memmove(I,J+2,strlen(J+2) + 1);
+                 // Pretend we just finished walking over the
+                 // comment, and don't add anything to the output
+                 // fragment.
+                 I = J + 1;

                  InComment = false;
                  break;
               }               
            }
            
            if (InComment == true)
                  InComment = false;
                  break;
               }               
            }
            
            if (InComment == true)

-           {
-              *I = 0;
-              break;
-           }       
+             break;

         }
         }

+        else
+          Fragment.push_back(*I);

       }
       }

-      
-      // Blank
-      if (Buffer[0] == 0)
+
+      // Skip blank lines.
+      if (Fragment.empty())

         continue;
       
         continue;
       

-      // We now have a valid line fragment
-      for (char *I = Buffer; *I != 0;)
+      // The line has actual content; interpret what it means.
+      InQuote = false;
+      Start = Fragment.begin();
+      End = Fragment.end();
+      for (std::string::const_iterator I = Start;
+          I != End; ++I)

       {
       {

-        if (*I == '{' || *I == ';' || *I == '}')
+        if (*I == '"')
+           InQuote = !InQuote;
+        
+        if (InQuote == false && (*I == '{' || *I == ';' || *I == '}'))

         {
         {

-           // Put the last fragement into the buffer
-           char *Start = Buffer;
-           char *Stop = I;
-           for (; Start != I && isspace(*Start) != 0; Start++);
-           for (; Stop != Start && isspace(Stop[-1]) != 0; Stop--);
-           if (LineBuffer.empty() == false && Stop - Start != 0)
+           // Put the last fragment into the buffer
+           std::string::const_iterator NonWhitespaceStart = Start;
+           std::string::const_iterator NonWhitespaceStop = I;
+           for (; NonWhitespaceStart != I && isspace(*NonWhitespaceStart) != 0; ++NonWhitespaceStart)
+             ;
+           for (; NonWhitespaceStop != NonWhitespaceStart && isspace(NonWhitespaceStop[-1]) != 0; --NonWhitespaceStop)
+             ;
+           if (LineBuffer.empty() == false && NonWhitespaceStop - NonWhitespaceStart != 0)

               LineBuffer += ' ';
               LineBuffer += ' ';

-           LineBuffer += string(Start,Stop - Start);
-           
-           // Remove the fragment
-           char TermChar = *I;
-           memmove(Buffer,I + 1,strlen(I + 1) + 1);
-           I = Buffer;
+           LineBuffer += string(NonWhitespaceStart, NonWhitespaceStop);

 
 

-           // Move up a tag
-           if (TermChar == '}')
-           {
-              string::size_type Pos = ParentTag.rfind("::");
-              if (Pos == string::npos)
-                 ParentTag = string();
-              else
-                 ParentTag = string(ParentTag,0,Pos);
-           }
+           // Drop this from the input string, saving the character
+           // that terminated the construct we just closed. (i.e., a
+           // brace or a semicolon)
+           char TermChar = *I;
+           Start = I + 1;

            
            // Syntax Error
            if (TermChar == '{' && LineBuffer.empty() == true)
            
            // Syntax Error
            if (TermChar == '{' && LineBuffer.empty() == true)

-              return _error->Error("Syntax error %s:%u: Block starts with no name.",FName.c_str(),CurLine);
+              return _error->Error(_("Syntax error %s:%u: Block starts with no name."),FName.c_str(),CurLine);

            
            

+           // No string on this line

            if (LineBuffer.empty() == true)
            if (LineBuffer.empty() == true)

+           {
+              if (TermChar == '}')
+              {
+                 if (StackPos == 0)
+                    ParentTag = string();
+                 else
+                    ParentTag = Stack[--StackPos];
+              }

               continue;
               continue;

-
+           }
+           

            // Parse off the tag
            // Parse off the tag

-           string::size_type Pos = LineBuffer.find(' ');
-           if (Pos == string::npos)
+           string Tag;
+           const char *Pos = LineBuffer.c_str();
+           if (ParseQuoteWord(Pos,Tag) == false)
+              return _error->Error(_("Syntax error %s:%u: Malformed tag"),FName.c_str(),CurLine);
+
+           // Parse off the word
+           string Word;
+           bool NoWord = false;
+           if (ParseCWord(Pos,Word) == false &&
+               ParseQuoteWord(Pos,Word) == false)

            {
            {

-              if (TermChar == '{')
-                 Pos = LineBuffer.length();
+              if (TermChar != '{')
+              {
+                 Word = Tag;
+                 Tag = "";
+              }

               else
               else

-                 return _error->Error("Syntax error %s:%u: Tag with no value",FName.c_str(),CurLine);
+                 NoWord = true;

            }
            }

-           
-           string Tag = string(LineBuffer,0,Pos);
+           if (strlen(Pos) != 0)
+              return _error->Error(_("Syntax error %s:%u: Extra junk after value"),FName.c_str(),CurLine);

 
            // Go down a level
            if (TermChar == '{')
            {
 
            // Go down a level
            if (TermChar == '{')
            {

+              if (StackPos <= 100)
+                 Stack[StackPos++] = ParentTag;
+              
+              /* Make sectional tags incorperate the section into the
+                 tag string */
+              if (AsSectional == true && Word.empty() == false)
+              {
+                 Tag += "::" ;
+                 Tag += Word;
+                 Word = "";
+              }
+              

               if (ParentTag.empty() == true)
                  ParentTag = Tag;
               else
                  ParentTag += string("::") + Tag;
               Tag = string();
            }
               if (ParentTag.empty() == true)
                  ParentTag = Tag;
               else
                  ParentTag += string("::") + Tag;
               Tag = string();
            }

-
-           // We dont have a value to set
-           if (Pos == LineBuffer.length())
-           {
-              LineBuffer = string();
-              continue;
-           }

            
            

-           // Parse off the word
-           string Word;
-           if (ParseCWord(LineBuffer.c_str()+Pos,Word) == false)
-              return _error->Error("Syntax error %s:%u: Malformed value",FName.c_str(),CurLine);
-              

            // Generate the item name
            string Item;
            if (ParentTag.empty() == true)
               Item = Tag;
            else
            {
            // Generate the item name
            string Item;
            if (ParentTag.empty() == true)
               Item = Tag;
            else
            {

-              if (Tag.empty() == true)
+              if (TermChar != '{' || Tag.empty() == false)
+                 Item = ParentTag + "::" + Tag;
+              else

                  Item = ParentTag;
                  Item = ParentTag;

+           }
+           
+           // Specials
+           if (Tag.length() >= 1 && Tag[0] == '#')
+           {
+              if (ParentTag.empty() == false)
+                 return _error->Error(_("Syntax error %s:%u: Directives can only be done at the top level"),FName.c_str(),CurLine);
+              Tag.erase(Tag.begin());
+              if (Tag == "clear")
+                 Conf.Clear(Word);
+              else if (Tag == "include")
+              {
+                 if (Depth > 10)
+                    return _error->Error(_("Syntax error %s:%u: Too many nested includes"),FName.c_str(),CurLine);
+                 if (Word.length() > 2 && Word.end()[-1] == '/')
+                 {
+                    if (ReadConfigDir(Conf,Word,AsSectional,Depth+1) == false)
+                       return _error->Error(_("Syntax error %s:%u: Included from here"),FName.c_str(),CurLine);
+                 }
+                 else
+                 {
+                    if (ReadConfigFile(Conf,Word,AsSectional,Depth+1) == false)
+                       return _error->Error(_("Syntax error %s:%u: Included from here"),FName.c_str(),CurLine);
+                 }               
+              }

               else
               else

-                 Item = ParentTag + "::" + Tag;
+                 return _error->Error(_("Syntax error %s:%u: Unsupported directive '%s'"),FName.c_str(),CurLine,Tag.c_str());
+           }
+           else if (Tag.empty() == true && NoWord == false && Word == "#clear")
+              return _error->Error(_("Syntax error %s:%u: clear directive requires an option tree as argument"),FName.c_str(),CurLine);
+           else
+           {
+              // Set the item in the configuration class
+              if (NoWord == false)
+                 Conf.Set(Item,Word);

            }
            
            }
            

-           // Set the item in the configuration class
-           Conf.Set(Item,Word);
-                           

            // Empty the buffer
            // Empty the buffer

-           LineBuffer = string();
+           LineBuffer.clear();
+           
+           // Move up a tag, but only if there is no bit to parse
+           if (TermChar == '}')
+           {
+              if (StackPos == 0)
+                 ParentTag.clear();
+              else
+                 ParentTag = Stack[--StackPos];
+           }
+           

         }
         }

-        else
-           I++;

       }
 
       }
 

-      // Store the fragment
-      const char *Stripd = _strstrip(Buffer);
-      if (*Stripd != 0 && LineBuffer.empty() == false)
-        LineBuffer += " ";
-      LineBuffer += Stripd;
+      // Store the remaining text, if any, in the current line buffer.
+
+      // NB: could change this to use string-based operations; I'm
+      // using strstrip now to ensure backwards compatibility.
+      //   -- dburrows 2008-04-01
+      {
+       char *Buffer = new char[End - Start + 1];
+       try
+         {
+           std::copy(Start, End, Buffer);
+           Buffer[End - Start] = '\0';
+
+           const char *Stripd = _strstrip(Buffer);
+           if (*Stripd != 0 && LineBuffer.empty() == false)
+             LineBuffer += " ";
+           LineBuffer += Stripd;
+         }
+       catch(...)
+         {
+           delete[] Buffer;
+           throw;
+         }
+       delete[] Buffer;
+      }

    }
    }

-   
+
+   if (LineBuffer.empty() == false)
+      return _error->Error(_("Syntax error %s:%u: Extra junk at end of file"),FName.c_str(),CurLine);
+   return true;
+}
+                                                                       /*}}}*/
+// ReadConfigDir - Read a directory of config files                    /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool ReadConfigDir(Configuration &Conf,const string &Dir,
+                  bool const &AsSectional, unsigned const &Depth)
+{
+   vector<string> const List = GetListOfFilesInDir(Dir, "conf", true, true);
+
+   // Read the files
+   for (vector<string>::const_iterator I = List.begin(); I != List.end(); ++I)
+      if (ReadConfigFile(Conf,*I,AsSectional,Depth) == false)
+        return false;

    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/

+// MatchAgainstConfig Constructor                                      /*{{{*/
+Configuration::MatchAgainstConfig::MatchAgainstConfig(char const * Config)
+{
+   std::vector<std::string> const strings = _config->FindVector(Config);
+   for (std::vector<std::string>::const_iterator s = strings.begin();
+       s != strings.end(); ++s)
+   {
+      regex_t *p = new regex_t;
+      if (regcomp(p, s->c_str(), REG_EXTENDED | REG_ICASE | REG_NOSUB) == 0)
+        patterns.push_back(p);
+      else
+      {
+        regfree(p);
+        delete p;
+        _error->Warning("Invalid regular expression '%s' in configuration "
+                         "option '%s' will be ignored.",
+                         s->c_str(), Config);
+        continue;
+      }
+   }
+   if (strings.empty() == true)
+      patterns.push_back(NULL);
+}
+                                                                       /*}}}*/
+// MatchAgainstConfig Destructor                                       /*{{{*/
+Configuration::MatchAgainstConfig::~MatchAgainstConfig()
+{
+   clearPatterns();
+}
+void Configuration::MatchAgainstConfig::clearPatterns()
+{
+   for(std::vector<regex_t *>::const_iterator p = patterns.begin();
+       p != patterns.end(); ++p)
+   {
+      if (*p == NULL) continue;
+      regfree(*p);
+      delete *p;
+   }
+   patterns.clear();
+}
+                                                                       /*}}}*/
+// MatchAgainstConfig::Match - returns true if a pattern matches       /*{{{*/
+bool Configuration::MatchAgainstConfig::Match(char const * str) const
+{
+   for(std::vector<regex_t *>::const_iterator p = patterns.begin();
+       p != patterns.end(); ++p)
+      if (*p != NULL && regexec(*p, str, 0, 0, 0) == 0)
+        return true;
+
+   return false;
+}
+                                                                       /*}}}*/