BPackageInfo: Add Matches()

Checks whether the package satisfies the given
BPackageResolvableExpression.

headers/os/package/PackageInfo.h

@@ -105,6 +105,9 @@ public:
 
 			BString				CanonicalFileName() const;
 
+			bool				Matches(const BPackageResolvableExpression&
+									expression) const;
+
 			void				SetName(const BString& name);
 			void				SetSummary(const BString& summary);
 			void				SetDescription(const BString& description);

src/kits/package/PackageInfo.cpp

@@ -582,6 +582,27 @@ BPackageInfo::CanonicalFileName() const
 }
 
 
+bool
+BPackageInfo::Matches(const BPackageResolvableExpression& expression) const
+{
+	// check for an explicit match on the package
+	if (expression.Name().StartsWith("pkg:")) {
+		return fName == expression.Name().String() + 4
+			&& expression.Matches(fVersion, fVersion);
+	}
+
+	// search for a matching provides
+	int32 count = fProvidesList.CountItems();
+	for (int32 i = 0; i < count; i++) {
+		const BPackageResolvable* provides = fProvidesList.ItemAt(i);
+		if (expression.Matches(*provides))
+			return true;
+	}
+
+	return false;
+}
+
+
 void
 BPackageInfo::SetName(const BString& name)
 {