commit 2bcc989: [Minor] Use unhex utility

[Vsevolod Stakhov]

Author: Vsevolod Stakhov
Date: 2021-12-21 21:18:17 +0000
URL: https://github.com/rspamd/rspamd/commit/2bcc9897a397de883561ebc19605d667a517c1c3 (HEAD -> master)

[Minor] Use unhex utility

---
 lualib/lua_content/pdf.lua | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/lualib/lua_content/pdf.lua b/lualib/lua_content/pdf.lua
index b3c1f6002..45c11d3b4 100644
--- a/lualib/lua_content/pdf.lua
+++ b/lualib/lua_content/pdf.lua
@@ -181,17 +181,14 @@ local function generic_grammar_elts()
 
   -- Helper functions
   local function pdf_hexstring_unescape(s)
-    local function ue(cc)
-      return string.char(tonumber(cc, 16))
-    end
     if #s % 2 == 0 then
       -- Sane hex string
-      return s:gsub('..', ue)
+      return lua_util.unhex(s)
     end
 
     -- WTF hex string
     -- Append '0' to it and unescape...
-    return s:sub(1, #s - 1):gsub('..' , ue) .. (s:sub(#s) .. '0'):gsub('..' , ue)
+    return lua_util.unhex(s:sub(1, #s - 1)) .. lua_util.unhex((s:sub(#s) .. '0'))
   end
 
   local function pdf_string_unescape(s)