Move decode_hex into its own file

- Error detection against strotul(3) has been improved, as done in other
places.
- New function encode_hex has been implemented, which will be used
by future commits.

1 files changed, 1 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2578291..83c25b1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,6 +5,7 @@ add_executable(${PROJECT_NAME}
     base64.c
     cftw.c
     handler.c
+    hex.c
     html.c
     http.c
     jwt.c