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Simplify a bit more tdeletechar and tinsertblank

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The large and repeated expression used in memmove to indirect
the line can be simplified using a pointer, that makes more
clear where begins and where ends the movement.
This commit is contained in:
Roberto E. Vargas Caballero 2014-04-25 17:24:12 +02:00
parent 80b32af794
commit 6b7f63bac5
1 changed files with 6 additions and 4 deletions
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10
st.c
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@ -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);
}