Sync

Author: jgg
Date: 1998-07-07 04:17:00 GMT
Sync

1 files changed, 137 insertions, 0 deletions

diff --git a/apt-pkg/contrib/configuration.cc b/apt-pkg/contrib/configuration.cc
new file mode 100644
index 000000000..6d937d657
--- /dev/null
+++ b/apt-pkg/contrib/configuration.cc
@@ -0,0 +1,137 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+// $Id: configuration.cc,v 1.1 1998/07/07 04:17:10 jgg Exp $
+/* ######################################################################
+
+   Configuration Class
+   
+   This class provides a configuration file and command line parser
+   for a tree-oriented configuration environment. All runtime configuration
+   is stored in here.
+   
+   ##################################################################### */
+									/*}}}*/
+// Include files							/*{{{*/
+#ifdef __GNUG__
+#pragma implementation "pkglib/configuration.h"
+#endif
+#include <pkglib/configuration.h>
+#include <strutl.h>
+
+#include <stdio.h>
+									/*}}}*/
+Configuration *_config;
+
+// Configuration::Configuration - Constructor				/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+Configuration::Configuration()
+{
+   Root = new 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,
+					   unsigned long Len,bool Create)
+{
+   int Res = 1;
+   Item *I = Head->Child;
+   Item **Last = &Head->Child;
+   for (; I != 0; Last = &I->Next, I = I->Next)
+      if ((Res = stringcasecmp(I->Value.begin(),I->Value.end(),S,S + Len)) == 0)
+	 break;
+
+   if (Res == 0)
+      return I;
+   if (Create == false)
+      return 0;
+   
+   I = new Item;
+   I->Value = string(S,Len);
+   I->Next = *Last;
+   *Last = I;
+   return I;
+}
+									/*}}}*/
+// Configuration::Lookup - Lookup a fully scoped item			/*{{{*/
+// ---------------------------------------------------------------------
+/* This performs a fully scoped lookup of a given name, possibly creating
+   new items */
+Configuration::Item *Configuration::Lookup(const char *Name,bool Create)
+{
+   const char *Start = Name;
+   const char *End = Start + strlen(Name);
+   const char *TagEnd = Name;
+   Item *Itm = Root;
+   for (; End - TagEnd > 2; TagEnd++)
+   {
+      if (TagEnd[0] == ':' && TagEnd[1] == ':')
+      {
+	 Itm = Lookup(Itm,Start,TagEnd - Start,Create);
+	 if (Itm == 0)
+	    return 0;
+	 TagEnd = Start = TagEnd + 2;	 
+      }
+   }   
+
+   Itm = Lookup(Itm,Start,End - Start,Create);
+   if (Itm == 0)
+      return 0;
+   return Itm;
+}
+									/*}}}*/
+// Configuration::Find - Find a value					/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+string Configuration::Find(const char *Name,const char *Default)
+{
+   Item *Itm = Lookup(Name,false);
+   if (Itm == 0 || Itm->Value.empty() == true)
+      return Default;
+   return Itm->Value;
+}
+									/*}}}*/
+// Configuration::FindI - Find an integer value				/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+int Configuration::FindI(const char *Name,int Default)
+{
+   Item *Itm = Lookup(Name,false);
+   if (Itm == 0 || Itm->Value.empty() == true)
+      return Default;
+   
+   char *End;
+   int Res = strtol(Itm->Value.c_str(),&End,0);
+   if (End == Itm->Value.c_str())
+      return Default;
+   
+   return Res;
+}
+									/*}}}*/
+// Configuration::Set - Set a value					/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void Configuration::Set(const char *Name,string Value)
+{
+   Item *Itm = Lookup(Name,true);
+   if (Itm == 0)
+      return;
+   Itm->Value = Value;
+}
+									/*}}}*/
+// Configuration::Set - Set an integer value				/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void Configuration::Set(const char *Name,int Value)
+{
+   Item *Itm = Lookup(Name,true);
+   if (Itm == 0)
+      return;
+   char S[300];
+   snprintf(S,sizeof(S),"%i",Value);
+   Itm->Value = S;
+}
+									/*}}}*/