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	replace "magic"-numbers with symbolic constants - lchat - A line oriented chat …
	git clone git://git.suckless.org/lchat
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	---
	commit 6d306ad60a3ed0d9e721a43fb121804974a41b6c
	parent 6dd484ff2d2a417037e56a205fc5ae22adaa6335
	Author: Tom Schwindl <[email protected]>
	Date: Wed, 11 Jan 2023 09:05:39 +0100

	replace "magic"-numbers with symbolic constants

	Diffstat:
	M slackline.c \| 10 +++++-----
	M slackline_emacs.c \| 16 ++++++++--------
	M slackline_internals.h \| 17 +++++++++++++++++

	3 files changed, 30 insertions(+), 13 deletions(-)
	---
	diff --git a/slackline.c b/slackline.c
	@@ -158,20 +158,20 @@ static void
	sl_default(struct slackline *sl, int key)
	{
	switch (key) {
	- case 27: /* Escape */
	+ case ESC_KEY:
	sl->esc = ESC;
	break;
	- case 21:
	+ case CTRL_U:
	sl_reset(sl);
	break;
	- case 23: /* ctrl+w -- erase previous word */
	+ case CTRL_W:
	while (sl->rcur != 0 && isspace((unsigned char) *(sl->ptr-1)))
	sl_backspace(sl);
	while (sl->rcur != 0 && !isspace((unsigned char) *(sl->ptr-1)))
	sl_backspace(sl);
	break;
	- case 127: /* backspace */
	- case 8: /* backspace */
	+ case BACKSPACE:
	+ case VT_BACKSPACE:
	sl_backspace(sl);
	break;
	default:
	diff --git a/slackline_emacs.c b/slackline_emacs.c
	@@ -11,16 +11,16 @@ sl_emacs(struct slackline *sl, int key)
	char tmp;

	switch (key) {
	- case 27: /* Escape */
	+ case ESC_KEY:
	sl->esc = ESC;
	break;
	- case 1: /* ctrl+a -- start of line */
	+ case CTRL_A:
	sl_move(sl, HOME);
	break;
	- case 2: /* ctrl+b -- previous char */
	+ case CTRL_B:
	sl_move(sl, LEFT);
	break;
	- case 4: /* ctrl+d -- delete char in front of the cursor or exit */
	+ case CTRL_D:
	if (sl->rcur < sl->rlen) {
	sl_move(sl, RIGHT);
	sl_backspace(sl);
	@@ -28,19 +28,19 @@ sl_emacs(struct slackline *sl, int key)
	exit(EXIT_SUCCESS);
	}
	break;
	- case 5: /* ctrl+e -- end of line */
	+ case CTRL_E:
	sl_move(sl, END);
	break;
	- case 6: /* ctrl+f -- next char */
	+ case CTRL_F:
	sl_move(sl, RIGHT);
	break;
	- case 11: /* ctrl+k -- delete line from cursor to end */
	+ case CTRL_K:
	for (int i = sl->rlen - sl->rcur; i > 0; --i) {
	sl_move(sl, RIGHT);
	sl_backspace(sl);
	}
	break;
	- case 20: /* ctrl+t -- swap last two chars */
	+ case CTRL_T:
	if (sl->rcur >= 2) {
	tmp = *sl_postoptr(sl, sl->rcur-1);
	sl->buf[sl->rcur-1] = *sl_postoptr(sl, sl->rcur-2);
	diff --git a/slackline_internals.h b/slackline_internals.h
	@@ -5,6 +5,23 @@

	enum direction {LEFT, RIGHT, HOME, END};

	+enum {
	+ CTRL_A = 1,
	+ CTRL_B = 2,
	+ CTRL_D = 4,
	+ CTRL_E = 5,
	+ CTRL_F = 6,
	+ CTRL_K = 11,
	+ CTRL_U = 21,
	+ CTRL_T = 20,
	+ CTRL_W = 23,
	+
	+ BACKSPACE = 127,
	+ VT_BACKSPACE = 8,
	+
	+ ESC_KEY = 27
	+};
	+
	size_t sl_postobyte(struct slackline *sl, size_t pos);
	char sl_postoptr(struct slackline sl, size_t pos);
	void sl_backspace(struct slackline *sl);