deal with empty values properly in deb822 parser

[apt.git] / apt-pkg / tagfile.cc

diff --git a/apt-pkg/tagfile.cc b/apt-pkg/tagfile.cc
index 4c5505bf30af0d53506dfba683aef0967cf7656b..a0b64f9ca812f95686366dffbe9cf1d57118d755 100644 (file)
--- a/apt-pkg/tagfile.cc
+++ b/apt-pkg/tagfile.cc
@@ -34,8 +34,10 @@ class pkgTagFilePrivate
 public:
    void Reset(FileFd * const pFd, unsigned long long const pSize)
    {
-      Fd = pFd;
+      if (Buffer != NULL)
+        free(Buffer);
       Buffer = NULL;
+      Fd = pFd;
       Start = NULL;
       End = NULL;
       Done = false;
@@ -43,7 +45,7 @@ public:
       Size = pSize;
    }
 
-   pkgTagFilePrivate(FileFd * const pFd, unsigned long long const Size)
+   pkgTagFilePrivate(FileFd * const pFd, unsigned long long const Size) : Buffer(NULL)
    {
       Reset(pFd, Size);
    }
@@ -54,6 +56,12 @@ public:
    bool Done;
    unsigned long long iOffset;
    unsigned long long Size;
+
+   ~pkgTagFilePrivate()
+   {
+      if (Buffer != NULL)
+        free(Buffer);
+   }
 };
 
 class pkgTagSectionPrivate
@@ -127,7 +135,6 @@ void pkgTagFile::Init(FileFd * const pFd,unsigned long long Size)
 /* */
 pkgTagFile::~pkgTagFile()
 {
-   free(d->Buffer);
    delete d;
 }
                                                                        /*}}}*/
@@ -298,21 +305,11 @@ APT_IGNORE_DEPRECATED_PUSH
 pkgTagSection::pkgTagSection()
    : Section(0), d(new pkgTagSectionPrivate()), Stop(0)
 {
-#if APT_PKG_ABI < 413
-   TagCount = 0;
-   memset(&Indexes, 0, sizeof(Indexes));
-#endif
    memset(&AlphaIndexes, 0, sizeof(AlphaIndexes));
 }
 APT_IGNORE_DEPRECATED_POP
                                                                        /*}}}*/
 // TagSection::Scan - Scan for the end of the header information       /*{{{*/
-#if APT_PKG_ABI < 413
-bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength)
-{
-   return Scan(Start, MaxLength, true);
-}
-#endif
 bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength, bool const Restart)
 {
    Section = Start;
@@ -338,11 +335,7 @@ bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength, bool const R
       }
       d->Tags.reserve(0x100);
    }
-#if APT_PKG_ABI >= 413
    unsigned int TagCount = d->Tags.size();
-#else
-   APT_IGNORE_DEPRECATED(TagCount = d->Tags.size();)
-#endif
 
    if (Stop == 0)
       return false;
@@ -360,7 +353,7 @@ bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength, bool const R
          return true;
 
       // Start a new index and add it to the hash
-      if (isspace(Stop[0]) == 0)
+      if (isspace_ascii(Stop[0]) == 0)
       {
         // store the last found tag
         if (lastTagData.EndTag != 0)
@@ -369,10 +362,6 @@ bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength, bool const R
               lastTagData.NextInBucket = AlphaIndexes[lastTagHash];
            APT_IGNORE_DEPRECATED_PUSH
            AlphaIndexes[lastTagHash] = TagCount;
-#if APT_PKG_ABI < 413
-           if (d->Tags.size() < sizeof(Indexes)/sizeof(Indexes[0]))
-              Indexes[d->Tags.size()] = lastTagData.StartTag;
-#endif
            APT_IGNORE_DEPRECATED_POP
            d->Tags.push_back(lastTagData);
         }
@@ -386,14 +375,16 @@ bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength, bool const R
         // find the end of the tag (which might or might not be the colon)
         char const * EndTag = Colon;
         --EndTag;
-        for (; EndTag > Stop && isspace(*EndTag) != 0; --EndTag)
+        for (; EndTag > Stop && isspace_ascii(*EndTag) != 0; --EndTag)
            ;
         ++EndTag;
         lastTagData.EndTag = EndTag - Section;
         lastTagHash = AlphaHash(Stop, EndTag - Stop);
         // find the beginning of the value
         Stop = Colon + 1;
-        for (; isspace(*Stop) != 0; ++Stop);
+        for (; isspace_ascii(*Stop) != 0; ++Stop)
+           if (*Stop == '\n' && Stop[1] != ' ')
+              break;
         if (Stop >= End)
            return false;
         lastTagData.StartValue = Stop - Section;
@@ -416,16 +407,10 @@ bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength, bool const R
            if (AlphaIndexes[lastTagHash] != 0)
               lastTagData.NextInBucket = AlphaIndexes[lastTagHash];
            APT_IGNORE_DEPRECATED(AlphaIndexes[lastTagHash] = TagCount;)
-#if APT_PKG_ABI < 413
-           APT_IGNORE_DEPRECATED(Indexes[d->Tags.size()] = lastTagData.StartTag;)
-#endif
            d->Tags.push_back(lastTagData);
         }
 
         pkgTagSectionPrivate::TagData const td(Stop - Section);
-#if APT_PKG_ABI < 413
-        APT_IGNORE_DEPRECATED(Indexes[d->Tags.size()] = td.StartTag;)
-#endif
         d->Tags.push_back(td);
         TrimRecord(false,End);
         return true;
@@ -456,11 +441,7 @@ void pkgTagSection::Trim()
 }
                                                                        /*}}}*/
 // TagSection::Exists - return True if a tag exists                    /*{{{*/
-#if APT_PKG_ABI >= 413
 bool pkgTagSection::Exists(const char* const Tag) const
-#else
-bool pkgTagSection::Exists(const char* const Tag)
-#endif
 {
    unsigned int tmp;
    return Find(Tag, tmp);
@@ -505,7 +486,7 @@ bool pkgTagSection::Find(const char *Tag,const char *&Start,
    if (unlikely(Start > End))
       return _error->Error("Internal parsing error");
 
-   for (; isspace(End[-1]) != 0 && End > Start; --End);
+   for (; isspace_ascii(End[-1]) != 0 && End > Start; --End);
 
    return true;
 }
@@ -533,7 +514,7 @@ string pkgTagSection::FindRawS(const char *Tag) const
    if (unlikely(Start > End))
       return "";
 
-   for (; isspace(End[-1]) != 0 && End > Start; --End);
+   for (; isspace_ascii(End[-1]) != 0 && End > Start; --End);
 
    return std::string(Start, End - Start);
 }
@@ -554,9 +535,15 @@ signed int pkgTagSection::FindI(const char *Tag,signed long Default) const
       return Default;
    strncpy(S,Start,Stop-Start);
    S[Stop - Start] = 0;
-   
+
+   errno = 0;
    char *End;
    signed long Result = strtol(S,&End,10);
+   if (errno == ERANGE ||
+       Result < std::numeric_limits<int>::min() || Result > std::numeric_limits<int>::max()) {
+      errno = ERANGE;
+      _error->Error(_("Cannot convert %s to integer: out of range"), S);
+   }
    if (S == End)
       return Default;
    return Result;
@@ -600,6 +587,34 @@ bool pkgTagSection::FindB(const char *Tag, bool const &Default) const
 // TagSection::FindFlag - Locate a yes/no type flag                    /*{{{*/
 // ---------------------------------------------------------------------
 /* The bits marked in Flag are masked on/off in Flags */
+bool pkgTagSection::FindFlag(const char * const Tag, uint8_t &Flags,
+                            uint8_t const Flag) const
+{
+   const char *Start;
+   const char *Stop;
+   if (Find(Tag,Start,Stop) == false)
+      return true;
+   return FindFlag(Flags, Flag, Start, Stop);
+}
+bool pkgTagSection::FindFlag(uint8_t &Flags, uint8_t const Flag,
+                                       char const* const Start, char const* const Stop)
+{
+   switch (StringToBool(string(Start, Stop)))
+   {
+      case 0:
+      Flags &= ~Flag;
+      return true;
+
+      case 1:
+      Flags |= Flag;
+      return true;
+
+      default:
+      _error->Warning("Unknown flag value: %s",string(Start,Stop).c_str());
+      return true;
+   }
+   return true;
+}
 bool pkgTagSection::FindFlag(const char *Tag,unsigned long &Flags,
                             unsigned long Flag) const
 {
@@ -659,7 +674,7 @@ pkgTagSection::Tag pkgTagSection::Tag::Rewrite(std::string const &Name, std::str
 }
 static bool WriteTag(FileFd &File, std::string Tag, std::string const &Value)
 {
-   if (Value.empty() || isspace(Value[0]) != 0)
+   if (Value.empty() || isspace_ascii(Value[0]) != 0)
       Tag.append(":");
    else
       Tag.append(": ");
@@ -768,6 +783,14 @@ bool pkgTagSection::Write(FileFd &File, char const * const * const Order, std::v
 }
                                                                        /*}}}*/
 
+void pkgUserTagSection::TrimRecord(bool /*BeforeRecord*/, const char* &End)/*{{{*/
+{
+   for (; Stop < End && (Stop[0] == '\n' || Stop[0] == '\r' || Stop[0] == '#'); Stop++)
+      if (Stop[0] == '#')
+        Stop = (const char*) memchr(Stop,'\n',End-Stop);
+}
+                                                                       /*}}}*/
+
 #include "tagfile-order.c"
 
 // TFRewrite - Rewrite a control record                                        /*{{{*/
@@ -805,7 +828,7 @@ bool TFRewrite(FILE *Output,pkgTagSection const &Tags,const char *Order[],
                Visited[J] |= 2;
                if (Rewrite[J].Rewrite != 0 && Rewrite[J].Rewrite[0] != 0)
                {
-                  if (isspace(Rewrite[J].Rewrite[0]))
+                  if (isspace_ascii(Rewrite[J].Rewrite[0]))
                      fprintf(Output,"%s:%s\n",Rewrite[J].NewTag,Rewrite[J].Rewrite);
                   else
                      fprintf(Output,"%s: %s\n",Rewrite[J].NewTag,Rewrite[J].Rewrite);
@@ -861,7 +884,7 @@ bool TFRewrite(FILE *Output,pkgTagSection const &Tags,const char *Order[],
            Visited[J] |= 2;
            if (Rewrite[J].Rewrite != 0 && Rewrite[J].Rewrite[0] != 0)
            {
-              if (isspace(Rewrite[J].Rewrite[0]))
+              if (isspace_ascii(Rewrite[J].Rewrite[0]))
                  fprintf(Output,"%s:%s\n",Rewrite[J].NewTag,Rewrite[J].Rewrite);
               else
                  fprintf(Output,"%s: %s\n",Rewrite[J].NewTag,Rewrite[J].Rewrite);
@@ -890,7 +913,7 @@ bool TFRewrite(FILE *Output,pkgTagSection const &Tags,const char *Order[],
       
       if (Rewrite[J].Rewrite != 0 && Rewrite[J].Rewrite[0] != 0)
       {
-        if (isspace(Rewrite[J].Rewrite[0]))
+        if (isspace_ascii(Rewrite[J].Rewrite[0]))
            fprintf(Output,"%s:%s\n",Rewrite[J].NewTag,Rewrite[J].Rewrite);
         else
            fprintf(Output,"%s: %s\n",Rewrite[J].NewTag,Rewrite[J].Rewrite);