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, 4 insertions, 0 deletions

diff --git a/include/qpdf/QUtil.hh b/include/qpdf/QUtil.hh
index 6ff90c45..927fc1d8 100644
--- a/include/qpdf/QUtil.hh
+++ b/include/qpdf/QUtil.hh
@@ -161,6 +161,10 @@ namespace QUtil
     QPDF_DLL
     std::shared_ptr<char> make_shared_cstr(std::string const&);
 
+    // Copy string as a unique_ptr to an array.
+    QPDF_DLL
+    std::unique_ptr<char[]> make_unique_cstr(std::string const&);
+
     // Returns lower-case hex-encoded version of the string, treating
     // each character in the input string as unsigned.  The output
     // string will be twice as long as the input string.