Base revisions

Author: jgg
Date: 1998-07-02 02:58:12 GMT
Base revisions

1 files changed, 64 insertions, 0 deletions

diff --git a/apt-pkg/tagfile.h b/apt-pkg/tagfile.h
new file mode 100644
index 000000000..a7a82dd1c
--- /dev/null
+++ b/apt-pkg/tagfile.h
@@ -0,0 +1,64 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+// $Id: tagfile.h,v 1.1 1998/07/02 02:58:13 jgg Exp $
+/* ######################################################################
+
+   Fast scanner for RFC-822 type header information
+   
+   This parser handles Debian package files (and others). Their form is
+   RFC-822 type header fields in groups seperated by a blank line.
+   
+   The parser reads the and provides methods to step linearly
+   over it or to jump to a pre-recorded start point and read that record.
+   
+   A second class is used to perform pre-parsing of the record. It works
+   by indexing the start of each header field and providing lookup 
+   functions for header fields.
+   
+   ##################################################################### */
+									/*}}}*/
+// Header section: pkglib
+#ifndef PKGLIB_TAGFILE_H
+#define PKGLIB_TAGFILE_H
+
+#include <pkglib/fileutl.h>
+
+class pkgTagSection
+{
+   const char *Section;
+   const char *Stop;
+   
+   // We have a limit of 256 tags per section.
+   unsigned short Indexes[256];
+   unsigned int TagCount;
+     
+   public:
+   
+   inline bool operator ==(const pkgTagSection &rhs) {return Section == rhs.Section;};
+   inline bool operator !=(const pkgTagSection &rhs) {return Section != rhs.Section;};
+   
+   bool Find(const char *Tag,const char *&Start, const char *&End);
+   bool Scan(const char *Start,unsigned long MaxLength);
+   inline unsigned long Length() {return Stop - Section;};
+
+   pkgTagSection() : Section(0), Stop(0) {};
+};
+
+class pkgTagFile
+{
+   File Fd;
+   char *Buffer;
+   char *Start;
+   char *End;
+   unsigned long Left;
+   
+   bool Fill();
+   
+   public:
+
+   bool Step(pkgTagSection &Section);
+   
+   pkgTagFile(File &F);
+};
+
+#endif