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	tSimplify a bit more tdeletechar and tinsertblank - st - [fork] customized buil…
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	---
	commit 6b7f63bac597ca03e18fe63ad522b4d1bded08d1
	parent 80b32af794b659cb15745cfb2a19fce0829c42c7
	Author: Roberto E. Vargas Caballero <[email protected]>
	Date: Fri, 25 Apr 2014 17:24:12 +0200

	Simplify a bit more tdeletechar and tinsertblank

	The large and repeated expression used in memmove to indirect
	tthe line can be simplified using a pointer, that makes more
	clear where begins and where ends the movement.

	Diffstat:
	M st.c \| 10 ++++++----

	1 file changed, 6 insertions(+), 4 deletions(-)
	---
	diff --git a/st.c b/st.c
	t@@ -1587,30 +1587,32 @@ tclearregion(int x1, int y1, int x2, int y2) {
	void
	tdeletechar(int n) {
	int dst, src, size;
	+ Glyph *line;

	LIMIT(n, 0, term.col - term.c.x);

	dst = term.c.x;
	src = term.c.x + n;
	size = term.col - src;
	+ line = term.line[term.c.y];

	- memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
	- size * sizeof(Glyph));
	+ memmove(&line[dst], &line[src], size * sizeof(Glyph));
	tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
	}

	void
	tinsertblank(int n) {
	int dst, src, size;
	+ Glyph *line;

	LIMIT(n, 0, term.col - term.c.x);

	dst = term.c.x + n;
	src = term.c.x;
	size = term.col - dst;
	+ line = term.line[term.c.y];

	- memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
	- size * sizeof(Glyph));
	+ memmove(&line[dst], &line[src], size * sizeof(Glyph));
	tclearregion(src, term.c.y, dst - 1, term.c.y);
	}