* doc/apt-cache.8.xml:

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

diff --git a/apt-pkg/contrib/configuration.cc b/apt-pkg/contrib/configuration.cc
index 3109fd7a58649b1775ec97d01d8807df5d40cb14..7326b84ea227d0ca0fdfed16c43df39df164ec4c 100644 (file)
--- a/apt-pkg/contrib/configuration.cc
+++ b/apt-pkg/contrib/configuration.cc
@@ -173,6 +173,11 @@ string Configuration::Find(const char *Name,const char *Default) const
  */
 string Configuration::FindFile(const char *Name,const char *Default) const
 {
  */
 string Configuration::FindFile(const char *Name,const char *Default) const
 {

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

    const Item *Itm = Lookup(Name);
    if (Itm == 0 || Itm->Value.empty() == true)
    {
    const Item *Itm = Lookup(Name);
    if (Itm == 0 || Itm->Value.empty() == true)
    {


@@ -204,7 +209,7 @@ string Configuration::FindFile(const char *Name,const char *Default) const
       Itm = Itm->Parent;
    }
 
       Itm = Itm->Parent;
    }
 

-   return val;
+   return rootDir + val;

 }
                                                                        /*}}}*/
 // Configuration::FindDir - Find a directory name                      /*{{{*/
 }
                                                                        /*}}}*/
 // Configuration::FindDir - Find a directory name                      /*{{{*/


@@ -490,8 +495,7 @@ bool ReadConfigFile(Configuration &Conf,const string &FName,bool AsSectional,
    ifstream F(FName.c_str(),ios::in); 
    if (!F != 0)
       return _error->Errno("ifstream::ifstream",_("Opening configuration file %s"),FName.c_str());
    ifstream F(FName.c_str(),ios::in); 
    if (!F != 0)
       return _error->Errno("ifstream::ifstream",_("Opening configuration file %s"),FName.c_str());

-   
-   char Buffer[1024];
+

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


@@ -503,23 +507,63 @@ bool ReadConfigFile(Configuration &Conf,const string &FName,bool AsSectional,
    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;
+       }
+      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++;

-      // This should be made to work instead, but this is better than looping
-      if (F.fail() && !F.eof())
-         return _error->Error(_("Line %d too long (max %u)"), CurLine, sizeof(Buffer));

 
 

-      _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;
            }       


@@ -530,57 +574,66 @@ bool ReadConfigFile(Configuration &Conf,const string &FName,bool AsSectional,
       
       // Discard single line comments
       bool InQuote = false;
       
       // Discard single line comments
       bool InQuote = false;

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

       {
         if (*I == '"')
            InQuote = !InQuote;
         if (InQuote == true)
            continue;
         
       {
         if (*I == '"')
            InQuote = !InQuote;
         if (InQuote == true)
            continue;
         

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

          {
          {

-           *I = 0;
+           End = I;

            break;
         }
       }
 
            break;
         }
       }
 

-      // Look for multi line comments
+      // Look for multi line comments and build up the
+      // fragment.
+      Fragment.reserve(End - Start);

       InQuote = false;
       InQuote = false;

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

       {
         if (*I == '"')
            InQuote = !InQuote;
         if (InQuote == true)
       {
         if (*I == '"')
            InQuote = !InQuote;
         if (InQuote == true)

-           continue;
-        
-        if (*I == '/' && I[1] == '*')
+          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
+      // The line has actual content; interpret what it means.

       InQuote = false;
       InQuote = false;

-      for (char *I = Buffer; *I != 0;)
+      Start = Fragment.begin();
+      End = Fragment.end();
+      for (std::string::const_iterator I = Start;
+          I != End; ++I)

       {
         if (*I == '"')
            InQuote = !InQuote;
       {
         if (*I == '"')
            InQuote = !InQuote;


@@ -588,18 +641,21 @@ bool ReadConfigFile(Configuration &Conf,const string &FName,bool AsSectional,
         if (InQuote == false && (*I == '{' || *I == ';' || *I == '}'))
         {
            // Put the last fragment into the buffer
         if (InQuote == false && (*I == '{' || *I == ';' || *I == '}'))
         {
            // Put the last fragment 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)
+           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
+           LineBuffer += string(NonWhitespaceStart, NonWhitespaceStop);
+
+           // 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;
            char TermChar = *I;

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

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


@@ -721,15 +777,32 @@ bool ReadConfigFile(Configuration &Conf,const string &FName,bool AsSectional,
            }
            
         }
            }
            
         }

-        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)
    }
 
    if (LineBuffer.empty() == false)