From 8eee0e231e9b75d8e5b0d0089980bbc309ef1d0f Mon Sep 17 00:00:00 2001
From: Duncan Temple Lang <duncan@r-project.org>
Date: Sat, 18 May 2019 13:50:51 -0700
Subject: [PATCH] add the / to the key if necessary

---
 Rqpdf/R/info.R | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Rqpdf/R/info.R b/Rqpdf/R/info.R
index fea5c67..148087b 100644
--- a/Rqpdf/R/info.R
+++ b/Rqpdf/R/info.R
@@ -5,6 +5,11 @@ function(file, key)
     file = path.expand(file)
     if(!file.exists(file))
         stop("no such file ", file)
+
+    # keys start with a / and if we omit this we get NA back.
+    # So we add it for the caller if it is not there.
+    if(!grepl("^/", key))
+        key = paste0("/", key)
     
     .Call("R_get_pdf_info_val", file, as.character(key))
 }