If a precision flag is included for s formatting that bounds the
maximum output length, so we need to use strnlen rather than strlen to
get the amount of data to emit. With that flag we can't expect there
to be a terminating NUL following the text to print.
Also fix handling of an empty precision, which should behave as if a
precision of zero was provided.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
It is really bad when you start having doubts about those edge cases
in your sleep. Better have it validated here instead.
Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
While documenting the float conversion code, I found there was room
for some optimization. In doing so I added test cases to cover edge
cases e.g. making sure proper rounding is applied and that no loss
of precision was introduced. Compiled code should be smaller and
faster.
Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
Factor out the CONFIG_CBPRINTF_LIBC_SUBSTS exception.
Remove redundant lines and obsolete comment.
Make some code pattern more consistent.
Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
Although flags with pointers are not defined behavior, there is a
desire to have them work, so add a test and fix the complete
implementation so it passes.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
Tests for most paths through the conversion infrastructure. Expected
output can be validated with the host libc by setting USE_LIBC within
the source.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
