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* scroll.c (scroll_cost): Remove; unused.

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* dispextern.h (scroll_cost): Remove decl.
This commit is contained in:
Paul Eggert 2011-04-13 19:20:00 -07:00
parent de68a1fc34
commit 13a55a78d4
3 changed files with 3 additions and 39 deletions
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3
src/ChangeLog
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@ -1,5 +1,8 @@
2011-04-14 Paul Eggert <eggert@cs.ucla.edu>
* scroll.c (scroll_cost): Remove; unused.
* dispextern.h (scroll_cost): Remove decl.
* region-cache.h (pp_cache): Mark as externally visible.
* process.c: Make symbols static if they're not exported.

1
src/dispextern.h
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@ -3303,7 +3303,6 @@ extern struct terminal *init_tty (const char *, const char *, int);
/* Defined in scroll.c */
extern int scrolling_max_lines_saved (int, int, int *, int *, int *);
extern int scroll_cost (struct frame *, int, int, int);
extern void do_line_insertion_deletion_costs (struct frame *, const char *,
const char *, const char *,
const char *, const char *,

38
src/scroll.c
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@ -882,44 +882,6 @@ scrolling_max_lines_saved (int start, int end,
return matchcount;
}
/* Return a measure of the cost of moving the lines starting with vpos
FROM, up to but not including vpos TO, down by AMOUNT lines (AMOUNT
may be negative). */
int
scroll_cost (FRAME_PTR frame, int from, int to, int amount)
{
/* Compute how many lines, at bottom of frame,
will not be involved in actual motion. */
EMACS_INT limit = to;
EMACS_INT offset;
EMACS_INT height = FRAME_LINES (frame);
if (amount == 0)
return 0;
if (! FRAME_SCROLL_REGION_OK (frame))
limit = height;
else if (amount > 0)
limit += amount;
if (amount < 0)
{
int temp = to;
to = from + amount;
from = temp + amount;
amount = - amount;
}
offset = height - limit;
return
(FRAME_INSERT_COST (frame)[offset + from]
+ (amount - 1) * FRAME_INSERTN_COST (frame)[offset + from]
+ FRAME_DELETE_COST (frame)[offset + to]
+ (amount - 1) * FRAME_DELETEN_COST (frame)[offset + to]);
}
/* Calculate the line insertion/deletion
overhead and multiply factor values */