Convert headerGetEntry() internals to use rpmtd for data

- new public API function headerGet() that returns data in rpmtd, with
  flags to control operation (just minmem or no for now)
- headerGet() is nice and short name, lifted from rpm5.org but our API
  differs as this takes a separate arg for the tag to get instead of
  (ab)using the container to pass data back and forth
- internal compatibility wrapper to keep headerGetEntry() and -MinMem
  version working

1 files changed, 15 insertions, 0 deletions

diff --git a/lib/header.h b/lib/header.h
index 68a27d532..f8eda86b3 100644
--- a/lib/header.h
+++ b/lib/header.h
@@ -266,6 +266,21 @@ int headerWrite(FD_t fd, Header h, enum hMagic magicp);
  */
 int headerIsEntry(Header h, rpmTag tag);
 
+enum headerGetFlags_e {
+    HEADERGET_DEFAULT	= 0,
+    HEADERGET_MINMEM 	= (1 << 0),
+};
+
+/** \ingroup header
+ * Retrieve tag value.
+ * @param h		header
+ * @param tag		tag
+ * @retval td		tag data container
+ * @param flags		retrieval modifier flags
+ * @return		1 on success, 0 on failure
+ */
+int headerGet(Header h, rpmTag tag, rpmtd td, int flags);
+
 /** \ingroup header
  * Free data allocated when retrieved from header.
  * @param h		header