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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: versionmatch.cc,v 1.9 2003/05/19 17:58:26 doogie 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.
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include <apt-pkg/versionmatch.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/error.h>
#include <stdio.h>
#include <ctype.h>
#include <fnmatch.h>
#include <sys/types.h>
#include <regex.h>
/*}}}*/
// VersionMatch::pkgVersionMatch - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* Break up the data string according to the selected type */
pkgVersionMatch::pkgVersionMatch(string Data,MatchType Type) : Type(Type)
{
MatchAll = false;
VerPrefixMatch = false;
RelVerPrefixMatch = false;
if (Type == None || Data.length() < 1)
return;
// Cut up the version representation
if (Type == Version)
{
if (Data.end()[-1] == '*')
{
VerPrefixMatch = true;
VerStr = string(Data,0,Data.length()-1);
}
else
VerStr = Data;
return;
}
if (Type == Release)
{
// All empty = match all
if (Data == "*")
{
MatchAll = true;
return;
}
// Are we a simple specification?
string::const_iterator I = Data.begin();
for (; I != Data.end() && *I != '='; I++);
if (I == Data.end())
{
// Temporary
if (isdigit(Data[0]))
RelVerStr = Data;
else
RelRelease = Data;
if (RelVerStr.length() > 0 && RelVerStr.end()[-1] == '*')
{
RelVerPrefixMatch = true;
RelVerStr = string(RelVerStr.begin(),RelVerStr.end()-1);
}
return;
}
char Spec[300];
char *Fragments[20];
snprintf(Spec,sizeof(Spec),"%s",Data.c_str());
if (TokSplitString(',',Spec,Fragments,
sizeof(Fragments)/sizeof(Fragments[0])) == false)
{
Type = None;
return;
}
for (unsigned J = 0; Fragments[J] != 0; J++)
{
if (strlen(Fragments[J]) < 3)
continue;
if (stringcasecmp(Fragments[J],Fragments[J]+2,"v=") == 0)
RelVerStr = Fragments[J]+2;
else if (stringcasecmp(Fragments[J],Fragments[J]+2,"o=") == 0)
RelOrigin = Fragments[J]+2;
else if (stringcasecmp(Fragments[J],Fragments[J]+2,"a=") == 0)
RelArchive = Fragments[J]+2;
else if (stringcasecmp(Fragments[J],Fragments[J]+2,"n=") == 0)
RelCodename = Fragments[J]+2;
else if (stringcasecmp(Fragments[J],Fragments[J]+2,"l=") == 0)
RelLabel = Fragments[J]+2;
else if (stringcasecmp(Fragments[J],Fragments[J]+2,"c=") == 0)
RelComponent = Fragments[J]+2;
else if (stringcasecmp(Fragments[J],Fragments[J]+2,"b=") == 0)
RelArchitecture = Fragments[J]+2;
}
if (RelVerStr.end()[-1] == '*')
{
RelVerPrefixMatch = true;
RelVerStr = string(RelVerStr.begin(),RelVerStr.end()-1);
}
return;
}
if (Type == Origin)
{
OrSite = Data;
return;
}
}
/*}}}*/
// VersionMatch::MatchVer - Match a version string with prefixing /*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgVersionMatch::MatchVer(const char *A,string B,bool Prefix)
{
const char *Ab = A;
const char *Ae = Ab + strlen(A);
// Strings are not a compatible size.
if (((unsigned)(Ae - Ab) != B.length() && Prefix == false) ||
(unsigned)(Ae - Ab) < B.length())
return false;
// Match (leading?)
if (stringcasecmp(B,Ab,Ab + B.length()) == 0)
return true;
return false;
}
/*}}}*/
// VersionMatch::Find - Locate the best match for the select type /*{{{*/
// ---------------------------------------------------------------------
/* */
pkgCache::VerIterator pkgVersionMatch::Find(pkgCache::PkgIterator Pkg)
{
pkgCache::VerIterator Ver = Pkg.VersionList();
for (; Ver.end() == false; Ver++)
{
if (Type == Version)
{
if (MatchVer(Ver.VerStr(),VerStr,VerPrefixMatch) == true)
return Ver;
continue;
}
for (pkgCache::VerFileIterator VF = Ver.FileList(); VF.end() == false; VF++)
if (FileMatch(VF.File()) == true)
return Ver;
}
// This will be Ended by now.
return Ver;
}
#ifndef FNM_CASEFOLD
#define FNM_CASEFOLD 0
#endif
bool pkgVersionMatch::ExpressionMatches(const char *pattern, const char *string)
{
std::cerr << "MATCH " << pattern;
if (pattern[0] == '/') {
bool res = false;
size_t length = strlen(pattern);
if (pattern[length - 1] == '/') {
regex_t preg;
char *regex = strdup(pattern + 1);
regex[length - 2] = '\0';
if (regcomp(&preg, regex, REG_EXTENDED | REG_ICASE) != 0) {
std::cerr << "E: Invalid regular expression: " << regex << "\n";
} else if (regexec(&preg, string, 0, NULL, 0) == 0) {
res = true;
}
free(regex);
return res;
}
}
return fnmatch(pattern, string, FNM_CASEFOLD) == 0;
}
bool pkgVersionMatch::ExpressionMatches(const std::string& pattern, const char *string)
{
return ExpressionMatches(pattern.c_str(), string);
}
/*}}}*/
// VersionMatch::FileMatch - Match against an index file /*{{{*/
// ---------------------------------------------------------------------
/* This matcher checks against the release file and the origin location
to see if the constraints are met. */
bool pkgVersionMatch::FileMatch(pkgCache::PkgFileIterator File)
{
if (Type == Release)
{
if (MatchAll == true)
return true;
/* cout << RelVerStr << ',' << RelOrigin << ',' << RelArchive << ',' << RelLabel << endl;
cout << File.Version() << ',' << File.Origin() << ',' << File.Archive() << ',' << File.Label() << endl;*/
if (RelVerStr.empty() == true && RelOrigin.empty() == true &&
RelArchive.empty() == true && RelLabel.empty() == true &&
RelRelease.empty() == true && RelCodename.empty() == true &&
RelComponent.empty() == true && RelArchitecture.empty() == true)
return false;
if (RelVerStr.empty() == false)
if (File->Version == 0 ||
(MatchVer(File.Version(),RelVerStr,RelVerPrefixMatch) == false &&
ExpressionMatches(RelVerStr, File.Version()) == false))
return false;
if (RelOrigin.empty() == false)
if (File->Origin == 0 || !ExpressionMatches(RelOrigin,File.Origin()))
return false;
if (RelArchive.empty() == false)
if (File->Archive == 0 ||
!ExpressionMatches(RelArchive,File.Archive()))
return false;
if (RelCodename.empty() == false)
if (File->Codename == 0 ||
!ExpressionMatches(RelCodename,File.Codename()))
return false;
if (RelRelease.empty() == false)
if ((File->Archive == 0 ||
!ExpressionMatches(RelRelease,File.Archive())) &&
(File->Codename == 0 ||
!ExpressionMatches(RelRelease,File.Codename())))
return false;
if (RelLabel.empty() == false)
if (File->Label == 0 ||
!ExpressionMatches(RelLabel,File.Label()))
return false;
if (RelComponent.empty() == false)
if (File->Component == 0 ||
!ExpressionMatches(RelComponent,File.Component()))
return false;
if (RelArchitecture.empty() == false)
if (File->Architecture == 0 ||
!ExpressionMatches(RelArchitecture,File.Architecture()))
return false;
return true;
}
if (Type == Origin)
{
if (OrSite.empty() == false) {
if (File->Site == 0 || !ExpressionMatches(OrSite, File.Site()))
return false;
} else // so we are talking about file:// or status file
if (strcmp(File.Site(),"") == 0 && File->Archive != 0) // skip the status file
return false;
return (ExpressionMatches(OrSite, File.Site())); /* both strings match */
}
return false;
}
/*}}}*/
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