factor regex package name matches into newly created cachefilter classes

3 files changed, 86 insertions, 2 deletions

diff --git a/apt-pkg/cachefilter.cc b/apt-pkg/cachefilter.cc
new file mode 100644
index 000000000..8f0725ea3
--- /dev/null
+++ b/apt-pkg/cachefilter.cc
@@ -0,0 +1,54 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+/** \file cachefilter.h
+    Collection of functor classes */
+									/*}}}*/
+// Include Files							/*{{{*/
+#include <apt-pkg/cachefilter.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/pkgcache.h>
+
+#include <apti18n.h>
+
+#include <string>
+
+#include <regex.h>
+									/*}}}*/
+namespace APT {
+namespace CacheFilter {
+PackageNameMatchesRegEx::PackageNameMatchesRegEx(std::string const &Pattern) {/*{{{*/
+	pattern = new regex_t;
+	int const Res = regcomp(pattern, Pattern.c_str(), REG_EXTENDED | REG_ICASE | REG_NOSUB);
+	if (Res == 0)
+		return;
+
+	delete pattern;
+	pattern = NULL;
+	char Error[300];
+	regerror(Res, pattern, Error, sizeof(Error));
+	_error->Error(_("Regex compilation error - %s"), Error);
+}
+									/*}}}*/
+bool PackageNameMatchesRegEx::operator() (pkgCache::PkgIterator const &Pkg) {/*{{{*/
+	if (unlikely(pattern == NULL))
+		return false;
+	else
+		return regexec(pattern, Pkg.Name(), 0, 0, 0) == 0;
+}
+									/*}}}*/
+bool PackageNameMatchesRegEx::operator() (pkgCache::GrpIterator const &Grp) {/*{{{*/
+	if (unlikely(pattern == NULL))
+		return false;
+	else
+		return regexec(pattern, Grp.Name(), 0, 0, 0) == 0;
+}
+									/*}}}*/
+PackageNameMatchesRegEx::~PackageNameMatchesRegEx() {			/*{{{*/
+	if (pattern == NULL)
+		return;
+	regfree(pattern);
+	delete pattern;
+}
+									/*}}}*/
+}
+}
diff --git a/apt-pkg/cachefilter.h b/apt-pkg/cachefilter.h
new file mode 100644
index 000000000..e7ab1723f
--- /dev/null
+++ b/apt-pkg/cachefilter.h
@@ -0,0 +1,29 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+/** \file cachefilter.h
+   Collection of functor classes */
+									/*}}}*/
+#ifndef APT_CACHEFILTER_H
+#define APT_CACHEFILTER_H
+// Include Files							/*{{{*/
+#include <apt-pkg/pkgcache.h>
+
+#include <string>
+
+#include <regex.h>
+									/*}}}*/
+namespace APT {
+namespace CacheFilter {
+// PackageNameMatchesRegEx						/*{{{*/
+class PackageNameMatchesRegEx {
+	regex_t* pattern;
+public:
+	PackageNameMatchesRegEx(std::string const &Pattern);
+	bool operator() (pkgCache::PkgIterator const &Pkg);
+	bool operator() (pkgCache::GrpIterator const &Grp);
+	~PackageNameMatchesRegEx();
+};
+									/*}}}*/
+}
+}
+#endif
diff --git a/apt-pkg/makefile b/apt-pkg/makefile
index 2a7958536..e9e5651b0 100644
--- a/apt-pkg/makefile
+++ b/apt-pkg/makefile
@@ -35,14 +35,15 @@ SOURCE+= pkgcache.cc version.cc depcache.cc \
 	 srcrecords.cc cachefile.cc versionmatch.cc policy.cc \
 	 pkgsystem.cc indexfile.cc pkgcachegen.cc acquire-item.cc \
 	 indexrecords.cc vendor.cc vendorlist.cc cdrom.cc indexcopy.cc \
-	 aptconfiguration.cc
+	 aptconfiguration.cc cachefilter.cc
 HEADERS+= algorithms.h depcache.h pkgcachegen.h cacheiterators.h \
 	  orderlist.h sourcelist.h packagemanager.h tagfile.h \
 	  init.h pkgcache.h version.h progress.h pkgrecords.h \
 	  acquire.h acquire-worker.h acquire-item.h acquire-method.h \
 	  clean.h srcrecords.h cachefile.h versionmatch.h policy.h \
 	  pkgsystem.h indexfile.h metaindex.h indexrecords.h vendor.h \
-	  vendorlist.h cdrom.h indexcopy.h aptconfiguration.h
+	  vendorlist.h cdrom.h indexcopy.h aptconfiguration.h \
+	  cachefilter.h
 
 # Source code for the debian specific components
 # In theory the deb headers do not need to be exported..