split up help messages for simpler reuse

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

diff --git a/apt-pkg/contrib/cmndline.cc b/apt-pkg/contrib/cmndline.cc
index 40365237e39dfce9f4445ebc01fa946458c7f652..60ce90f1f839507d435f9fadbc8548fa25a59b6a 100644 (file)
--- a/apt-pkg/contrib/cmndline.cc
+++ b/apt-pkg/contrib/cmndline.cc
@@ -83,6 +83,43 @@ char const * CommandLine::GetCommand(Dispatch const * const Map,
            return Map[j].Match;
    }
    return NULL;
+}
+char const * CommandLine::GetCommand(DispatchWithHelp const * const Map,
+      unsigned int const argc, char const * const * const argv)
+{
+   // if there is a -- on the line there must be the word we search for either
+   // before it (as -- marks the end of the options) or right after it (as we can't
+   // decide if the command is actually an option, given that in theory, you could
+   // have parameters named like commands)
+   for (size_t i = 1; i < argc; ++i)
+   {
+      if (strcmp(argv[i], "--") != 0)
+        continue;
+      // check if command is before --
+      for (size_t k = 1; k < i; ++k)
+        for (size_t j = 0; Map[j].Match != NULL; ++j)
+           if (strcmp(argv[k], Map[j].Match) == 0)
+              return Map[j].Match;
+      // see if the next token after -- is the command
+      ++i;
+      if (i < argc)
+        for (size_t j = 0; Map[j].Match != NULL; ++j)
+           if (strcmp(argv[i], Map[j].Match) == 0)
+              return Map[j].Match;
+      // we found a --, but not a command
+      return NULL;
+   }
+   // no --, so search for the first word matching a command
+   // FIXME: How like is it that an option parameter will be also a valid Match ?
+   for (size_t i = 1; i < argc; ++i)
+   {
+      if (*(argv[i]) == '-')
+        continue;
+      for (size_t j = 0; Map[j].Match != NULL; ++j)
+        if (strcmp(argv[i], Map[j].Match) == 0)
+           return Map[j].Match;
+   }
+   return NULL;
 }
                                                                        /*}}}*/
 // CommandLine::Parse - Main action member                             /*{{{*/
@@ -374,8 +411,29 @@ unsigned int CommandLine::FileSize() const
 }
                                                                        /*}}}*/
 // CommandLine::DispatchArg - Do something with the first arg          /*{{{*/
-// ---------------------------------------------------------------------
-/* */
+bool CommandLine::DispatchArg(DispatchWithHelp *Map,bool NoMatch)
+{
+   int I;
+   for (I = 0; Map[I].Match != 0; I++)
+   {
+      if (strcmp(FileList[0],Map[I].Match) == 0)
+      {
+        bool Res = Map[I].Handler(*this);
+        if (Res == false && _error->PendingError() == false)
+           _error->Error("Handler silently failed");
+        return Res;
+      }
+   }
+   
+   // No matching name
+   if (Map[I].Match == 0)
+   {
+      if (NoMatch == true)
+        _error->Error(_("Invalid operation %s"),FileList[0]);
+   }
+   
+   return false;
+}
 bool CommandLine::DispatchArg(Dispatch *Map,bool NoMatch)
 {
    int I;