+void pkgTagSection::Get(const char *&Start,const char *&Stop,unsigned int I) const
+{
+ Start = Section + d->Tags[I].StartTag;
+ Stop = Section + d->Tags[I+1].StartTag;
+}
+APT_PURE unsigned int pkgTagSection::Count() const { /*{{{*/
+ if (d->Tags.empty() == true)
+ return 0;
+ // the last element is just marking the end and isn't a real one
+ return d->Tags.size() - 1;
+}
+ /*}}}*/
+// TagSection::Write - Ordered (re)writing of fields /*{{{*/
+pkgTagSection::Tag pkgTagSection::Tag::Remove(std::string const &Name)
+{
+ return Tag(REMOVE, Name, "");
+}
+pkgTagSection::Tag pkgTagSection::Tag::Rename(std::string const &OldName, std::string const &NewName)
+{
+ return Tag(RENAME, OldName, NewName);
+}
+pkgTagSection::Tag pkgTagSection::Tag::Rewrite(std::string const &Name, std::string const &Data)
+{
+ if (Data.empty() == true)
+ return Tag(REMOVE, Name, "");
+ else
+ return Tag(REWRITE, Name, Data);
+}
+static bool WriteTag(FileFd &File, std::string Tag, std::string const &Value)
+{
+ if (Value.empty() || isspace(Value[0]) != 0)
+ Tag.append(":");
+ else
+ Tag.append(": ");
+ Tag.append(Value);
+ Tag.append("\n");
+ return File.Write(Tag.c_str(), Tag.length());
+}
+static bool RewriteTags(FileFd &File, pkgTagSection const * const This, char const * const Tag,
+ std::vector<pkgTagSection::Tag>::const_iterator &R,
+ std::vector<pkgTagSection::Tag>::const_iterator const &REnd)
+{
+ size_t const TagLen = strlen(Tag);
+ for (; R != REnd; ++R)
+ {
+ std::string data;
+ if (R->Name.length() == TagLen && strncasecmp(R->Name.c_str(), Tag, R->Name.length()) == 0)
+ {
+ if (R->Action != pkgTagSection::Tag::REWRITE)
+ break;
+ data = R->Data;
+ }
+ else if(R->Action == pkgTagSection::Tag::RENAME && R->Data.length() == TagLen &&
+ strncasecmp(R->Data.c_str(), Tag, R->Data.length()) == 0)
+ data = This->FindRawS(R->Name.c_str());
+ else
+ continue;
+
+ return WriteTag(File, Tag, data);
+ }
+ return true;
+}
+bool pkgTagSection::Write(FileFd &File, char const * const * const Order, std::vector<Tag> const &Rewrite) const
+{
+ // first pass: Write everything we have an order for
+ if (Order != NULL)
+ {
+ for (unsigned int I = 0; Order[I] != 0; ++I)
+ {
+ std::vector<Tag>::const_iterator R = Rewrite.begin();
+ if (RewriteTags(File, this, Order[I], R, Rewrite.end()) == false)
+ return false;
+ if (R != Rewrite.end())
+ continue;
+
+ if (Exists(Order[I]) == false)
+ continue;
+
+ if (WriteTag(File, Order[I], FindRawS(Order[I])) == false)
+ return false;
+ }
+ }
+ // second pass: See if we have tags which aren't ordered
+ if (d->Tags.empty() == false)
+ {
+ for (std::vector<pkgTagSectionPrivate::TagData>::const_iterator T = d->Tags.begin(); T != d->Tags.end() - 1; ++T)
+ {
+ char const * const fieldname = Section + T->StartTag;
+ size_t fieldnamelen = T->EndTag - T->StartTag;
+ if (Order != NULL)
+ {
+ unsigned int I = 0;
+ for (; Order[I] != 0; ++I)
+ {
+ if (fieldnamelen == strlen(Order[I]) && strncasecmp(fieldname, Order[I], fieldnamelen) == 0)
+ break;
+ }
+ if (Order[I] != 0)
+ continue;
+ }
+
+ std::string const name(fieldname, fieldnamelen);
+ std::vector<Tag>::const_iterator R = Rewrite.begin();
+ if (RewriteTags(File, this, name.c_str(), R, Rewrite.end()) == false)
+ return false;
+ if (R != Rewrite.end())
+ continue;
+
+ if (WriteTag(File, name, FindRawS(name.c_str())) == false)
+ return false;
+ }
+ }
+ // last pass: see if there are any rewrites remaining we haven't done yet
+ for (std::vector<Tag>::const_iterator R = Rewrite.begin(); R != Rewrite.end(); ++R)
+ {
+ if (R->Action == Tag::REMOVE)
+ continue;
+ std::string const name = ((R->Action == Tag::RENAME) ? R->Data : R->Name);
+ if (Exists(name.c_str()))
+ continue;
+ if (Order != NULL)
+ {
+ unsigned int I = 0;
+ for (; Order[I] != 0; ++I)
+ {
+ if (strncasecmp(name.c_str(), Order[I], name.length()) == 0 && name.length() == strlen(Order[I]))
+ break;
+ }
+ if (Order[I] != 0)
+ continue;
+ }
+
+ if (WriteTag(File, name, ((R->Action == Tag::RENAME) ? FindRawS(R->Name.c_str()) : R->Data)) == false)
+ return false;
+ }
+ return true;
+}
+ /*}}}*/
+
+#include "tagfile-order.c"
+
projects / apt.git / blobdiff