From d567baabbd99fdb92e67295a77aef76ef970e65c Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <e.dolstra@tudelft.nl>
Date: Tue, 1 Jul 2008 10:10:32 +0000
Subject: * Export the nix-env derivation name parsing and version comparison  
 logic through the `parseDrvName' and `compareVersions' primops.   This will
 allow expressions to easily check whether some dependency   is a specific
 needed version or falls in some version range.  See  
 tests/lang/eval-okay-versions.nix for examples.

---
 src/libexpr/names.hh | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 src/libexpr/names.hh

(limited to 'src/libexpr/names.hh')

diff --git a/src/libexpr/names.hh b/src/libexpr/names.hh
new file mode 100644
index 000000000000..e189302d6d94
--- /dev/null
+++ b/src/libexpr/names.hh
@@ -0,0 +1,33 @@
+#ifndef __NAMES_H
+#define __NAMES_H
+
+#include "types.hh"
+
+
+namespace nix {
+
+
+struct DrvName
+{
+    string fullName;
+    string name;
+    string version;
+    unsigned int hits;
+
+    DrvName();
+    DrvName(const string & s);
+    bool matches(DrvName & n);
+};
+
+
+typedef list<DrvName> DrvNames;
+
+
+int compareVersions(const string & v1, const string & v2);
+DrvNames drvNamesFromArgs(const Strings & opArgs);
+
+
+}
+
+
+#endif /* !__NAMES_H */
-- 
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