fix pkgTagSection::Exists() and add test

2 files changed, 10 insertions, 3 deletions

diff --git a/apt-pkg/tagfile.cc b/apt-pkg/tagfile.cc
index 79811899a..1c79ee74f 100644
--- a/apt-pkg/tagfile.cc
+++ b/apt-pkg/tagfile.cc
@@ -282,10 +282,17 @@ void pkgTagSection::Trim()
    for (; Stop > Section + 2 && (Stop[-2] == '\n' || Stop[-2] == '\r'); Stop--);
 }
 									/*}}}*/
+// TagSection::Exists - return True if a tag exists                	/*{{{*/
+bool pkgTagSection::Exists(const char* const Tag)
+{
+   unsigned int tmp;
+   return Find(Tag, tmp);
+}
+									/*}}}*/
 // TagSection::Find - Locate a tag					/*{{{*/
 // ---------------------------------------------------------------------
 /* This searches the section for a tag that matches the given string. */
-bool pkgTagSection::Find(const char *Tag,unsigned &Pos) const
+bool pkgTagSection::Find(const char *Tag,unsigned int &Pos) const
 {
    unsigned int Length = strlen(Tag);
    unsigned int I = AlphaIndexes[AlphaHash(Tag)];
diff --git a/apt-pkg/tagfile.h b/apt-pkg/tagfile.h
index fd24471c1..4718f5101 100644
--- a/apt-pkg/tagfile.h
+++ b/apt-pkg/tagfile.h
@@ -59,7 +59,7 @@ class pkgTagSection
    inline bool operator !=(const pkgTagSection &rhs) {return Section != rhs.Section;};
    
    bool Find(const char *Tag,const char *&Start, const char *&End) const;
-   bool Find(const char *Tag,unsigned &Pos) const;
+   bool Find(const char *Tag,unsigned int &Pos) const;
    std::string FindS(const char *Tag) const;
    signed int FindI(const char *Tag,signed long Default = 0) const ;
    unsigned long long FindULL(const char *Tag, unsigned long long const &Default = 0) const;
@@ -73,7 +73,7 @@ class pkgTagSection
    virtual void TrimRecord(bool BeforeRecord, const char* &End);
    
    inline unsigned int Count() const {return TagCount;};
-   inline bool Exists(const char* const Tag) {return AlphaIndexes[AlphaHash(Tag)] != 0;}
+   bool Exists(const char* const Tag);
  
    inline void Get(const char *&Start,const char *&Stop,unsigned int I) const
                    {Start = Section + Indexes[I]; Stop = Section + Indexes[I+1];}