libcamera: utils: Add hex stream output helper

Add a utils::hex() function that simplifies writing hexadecimal values
to an ostream. The function handles the '0x' prefix, the field width and
the fill character automatically. Use it through the libcamera code
base, and add a test.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/test/meson.build b/test/meson.build
index 84722cce..cf5eb84d 100644
--- a/test/meson.build
+++ b/test/meson.build
@@ -30,6 +30,7 @@ internal_tests = [
     ['threads',                         'threads.cpp'],
     ['timer',                           'timer.cpp'],
     ['timer-thread',                    'timer-thread.cpp'],
+    ['utils',                           'utils.cpp'],
 ]
 
 foreach t : public_tests