Improve use of std::unique_ptr

* Use unique_ptr in place of shared_ptr in some cases
* unique_ptr for arrays does not require a custom deleter
* use std::make_unique (c++14) where possible

1 files changed, 1 insertions, 1 deletions

diff --git a/libqpdf/QPDF_encryption.cc b/libqpdf/QPDF_encryption.cc
index 54c2dadc..5ce63e4c 100644
--- a/libqpdf/QPDF_encryption.cc
+++ b/libqpdf/QPDF_encryption.cc
@@ -1211,7 +1211,7 @@ QPDF::decryptString(std::string& str, int objid, int generation)
 	    size_t vlen = str.length();
 	    // Using PointerHolder guarantees that tmp will
 	    // be freed even if rc4.process throws an exception.
-	    auto tmp = QUtil::make_shared_cstr(str);
+	    auto tmp = QUtil::make_unique_cstr(str);
 	    RC4 rc4(QUtil::unsigned_char_pointer(key), toI(key.length()));
 	    rc4.process(QUtil::unsigned_char_pointer(tmp.get()), vlen);
 	    str = std::string(tmp.get(), vlen);