rework some code to fix some scan-build warnings

No visible functional changes, just code moved around and additional
checks to eliminate impossible branches

Reported-By: scan-build
Git-Dch: Ignore

2 files changed, 27 insertions, 31 deletions

diff --git a/ftparchive/contents.cc b/ftparchive/contents.cc
index 015c790e0..80fe6e17e 100644
--- a/ftparchive/contents.cc
+++ b/ftparchive/contents.cc
@@ -233,7 +233,7 @@ void GenContents::Add(const char *Dir,const char *Package)
    
    // The final component if it does not have a trailing /
    if (I - Start >= 1)
-      Root = Grab(Root,Start,Package);
+      Grab(Root,Start,Package);
 }
 									/*}}}*/
 // GenContents::WriteSpace - Write a given number of white space chars	/*{{{*/
diff --git a/ftparchive/override.cc b/ftparchive/override.cc
index 1288ff133..d2130db8a 100644
--- a/ftparchive/override.cc
+++ b/ftparchive/override.cc
@@ -52,45 +52,41 @@ bool Override::ReadOverride(string const &File,bool const &Source)
       if (*Pkg == 0)
 	 continue;
 
+#define APT_FIND_NEXT_FIELD \
+      for (End++; isspace(*End) != 0 && *End != 0; ++End) \
+	 /* skip spaces */ ; \
+      Start = End; \
+      for (; isspace(*End) == 0 && *End != 0; ++End) \
+	 /* find end of word */ ;
+
+#define APT_WARNING_MALFORMED_LINE(FIELD) \
+      if (*End == 0) \
+      { \
+	 _error->Warning(_("Malformed override %s line %llu (%s)"),File.c_str(), \
+			 Counter, FIELD ); \
+	 continue; \
+      } \
+      *End = 0;
+
       // Find the package and zero..
-      char *Start = Pkg;
+      char *Start;
       char *End = Pkg;
       for (; isspace(*End) == 0 && *End != 0; End++);
-      if (*End == 0)
-      {
-	 _error->Warning(_("Malformed override %s line %llu #1"),File.c_str(),
-			 Counter);
-	 continue;
-      }      
-      *End = 0;
+      APT_WARNING_MALFORMED_LINE("pkgname");
+
+      APT_FIND_NEXT_FIELD;
 
       // Find the priority
       if (Source == false)
       {
-	 for (End++; isspace(*End) != 0 && *End != 0; End++);
-	 Start = End;
-	 for (; isspace(*End) == 0 && *End != 0; End++);
-	 if (*End == 0)
-	 {
-	    _error->Warning(_("Malformed override %s line %llu #2"),File.c_str(),
-			    Counter);
-	    continue;
-	 }
-	 *End = 0;
+	 APT_WARNING_MALFORMED_LINE("priority");
 	 Itm.Priority = Start;
+
+	 APT_FIND_NEXT_FIELD;
       }
-      
+
       // Find the Section
-      for (End++; isspace(*End) != 0 && *End != 0; End++);
-      Start = End;
-      for (; isspace(*End) == 0 && *End != 0; End++);
-      if (*End == 0)
-      {
-	 _error->Warning(_("Malformed override %s line %llu #3"),File.c_str(),
-			 Counter);
-	 continue;
-      }      
-      *End = 0;
+      APT_WARNING_MALFORMED_LINE("section");
       Itm.FieldOverride["Section"] = Start;
 
       // Source override files only have the two columns
@@ -99,7 +95,7 @@ bool Override::ReadOverride(string const &File,bool const &Source)
 	 Mapping[Pkg] = Itm;
 	 continue;
       }
-      
+
       // Find the =>
       for (End++; isspace(*End) != 0 && *End != 0; End++);
       if (*End != 0)