diff options
author | Johannes Schindelin <johannes.schindelin@gmx.de> | 2020-01-14 21:43:49 +0300 |
---|---|---|
committer | Junio C Hamano <gitster@pobox.com> | 2020-01-15 23:06:17 +0300 |
commit | a5e46e6b0101b960c131dd39b50999cc0e69ed2b (patch) | |
tree | 015f926507d78291928b4e6c32c65346b1d98f14 /add-patch.c | |
parent | 9ea416cb511e87f830462b08ae74b8a78fcca223 (diff) |
terminal: add a new function to read a single keystroke
Typically, input on the command-line is line-based. It is actually not
really easy to get single characters (or better put: keystrokes).
We provide two implementations here:
- One that handles `/dev/tty` based systems as well as native Windows.
The former uses the `tcsetattr()` function to put the terminal into
"raw mode", which allows us to read individual keystrokes, one by one.
The latter uses `stty.exe` to do the same, falling back to direct
Win32 Console access.
Thanks to the refactoring leading up to this commit, this is a single
function, with the platform-specific details hidden away in
conditionally-compiled code blocks.
- A fall-back which simply punts and reads back an entire line.
Note that the function writes the keystroke into an `strbuf` rather than
a `char`, in preparation for reading Escape sequences (e.g. when the
user hit an arrow key). This is also required for UTF-8 sequences in
case the keystroke corresponds to a non-ASCII letter.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'add-patch.c')
0 files changed, 0 insertions, 0 deletions