/usr/include/apt-pkg/versionmatch.h is in libapt-pkg-dev 1.0.1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Description /*{{{*/
// $Id: versionmatch.h,v 1.4 2001/05/29 03:07:12 jgg Exp $
/* ######################################################################
Version Matching
This module takes a matching string and a type and locates the version
record that satisfies the constraint described by the matching string.
Version: 1.2*
Release: o=Debian,v=2.1*,c=main
Release: v=2.1*
Release: a=testing
Release: n=squeeze
Release: *
Origin: ftp.debian.org
Release may be a complex type that can specify matches for any of:
Version (v= with prefix)
Origin (o=)
Archive (a=) eg, unstable, testing, stable
Codename (n=) e.g. etch, lenny, squeeze, sid
Label (l=)
Component (c=)
Binary Architecture (b=)
If there are no equals signs in the string then it is scanned in short
form - if it starts with a number it is Version otherwise it is an
Archive or a Codename.
Release may be a '*' to match all releases.
##################################################################### */
/*}}}*/
#ifndef PKGLIB_VERSIONMATCH_H
#define PKGLIB_VERSIONMATCH_H
#include <apt-pkg/pkgcache.h>
#include <apt-pkg/cacheiterators.h>
#include <string>
#ifndef APT_8_CLEANER_HEADERS
using std::string;
#endif
class pkgVersionMatch
{
// Version Matching
std::string VerStr;
bool VerPrefixMatch;
// Release Matching
std::string RelVerStr;
bool RelVerPrefixMatch;
std::string RelOrigin;
std::string RelRelease;
std::string RelCodename;
std::string RelArchive;
std::string RelLabel;
std::string RelComponent;
std::string RelArchitecture;
bool MatchAll;
// Origin Matching
std::string OrSite;
public:
enum MatchType {None = 0,Version,Release,Origin} Type;
bool MatchVer(const char *A,std::string B,bool Prefix) APT_PURE;
bool ExpressionMatches(const char *pattern, const char *string);
bool ExpressionMatches(const std::string& pattern, const char *string);
bool FileMatch(pkgCache::PkgFileIterator File);
pkgCache::VerIterator Find(pkgCache::PkgIterator Pkg);
pkgVersionMatch(std::string Data,MatchType Type);
};
#endif
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