/* Code for doing intervals.
- Copyright (C) 1993-1995, 1997-1998, 2001-2011 Free Software Foundation, Inc.
+ Copyright (C) 1993-1995, 1997-1998, 2001-2012 Free Software Foundation, Inc.
This file is part of GNU Emacs.
#include <intprops.h>
#include "lisp.h"
#include "intervals.h"
+#include "character.h"
#include "buffer.h"
#include "puresize.h"
#include "keyboard.h"
Pass FUNCTION two args: an interval, and ARG. */
void
-traverse_intervals (INTERVAL tree, EMACS_INT position,
+traverse_intervals (INTERVAL tree, ptrdiff_t position,
void (*function) (INTERVAL, Lisp_Object), Lisp_Object arg)
{
while (!NULL_INTERVAL_P (tree))
{
INTERVAL i;
INTERVAL B = interval->left;
- EMACS_INT old_total = interval->total_length;
+ ptrdiff_t old_total = interval->total_length;
/* Deal with any Parent of A; make it point to B. */
if (! ROOT_INTERVAL_P (interval))
{
INTERVAL i;
INTERVAL B = interval->right;
- EMACS_INT old_total = interval->total_length;
+ ptrdiff_t old_total = interval->total_length;
/* Deal with any parent of A; make it point to B. */
if (! ROOT_INTERVAL_P (interval))
static INTERVAL
balance_an_interval (INTERVAL i)
{
- register EMACS_INT old_diff, new_diff;
+ register ptrdiff_t old_diff, new_diff;
while (1)
{
it is still a root after this operation. */
INTERVAL
-split_interval_right (INTERVAL interval, EMACS_INT offset)
+split_interval_right (INTERVAL interval, ptrdiff_t offset)
{
INTERVAL new = make_interval ();
- EMACS_INT position = interval->position;
- EMACS_INT new_length = LENGTH (interval) - offset;
+ ptrdiff_t position = interval->position;
+ ptrdiff_t new_length = LENGTH (interval) - offset;
new->position = position + offset;
SET_INTERVAL_PARENT (new, interval);
it is still a root after this operation. */
INTERVAL
-split_interval_left (INTERVAL interval, EMACS_INT offset)
+split_interval_left (INTERVAL interval, ptrdiff_t offset)
{
INTERVAL new = make_interval ();
- EMACS_INT new_length = offset;
+ ptrdiff_t new_length = offset;
new->position = interval->position;
interval->position = interval->position + offset;
will update this cache based on the result of find_interval. */
INTERVAL
-find_interval (register INTERVAL tree, register EMACS_INT position)
+find_interval (register INTERVAL tree, register ptrdiff_t position)
{
/* The distance from the left edge of the subtree at TREE
to POSITION. */
- register EMACS_INT relative_position;
+ register ptrdiff_t relative_position;
if (NULL_INTERVAL_P (tree))
return NULL_INTERVAL;
relative_position -= BUF_BEG (XBUFFER (parent));
}
- if (relative_position > TOTAL_LENGTH (tree))
- abort (); /* Paranoia */
+ eassert (relative_position <= TOTAL_LENGTH (tree));
if (!handling_signal)
tree = balance_possible_root_interval (tree);
next_interval (register INTERVAL interval)
{
register INTERVAL i = interval;
- register EMACS_INT next_position;
+ register ptrdiff_t next_position;
if (NULL_INTERVAL_P (i))
return NULL_INTERVAL;
To speed up the process, we assume that the ->position of
I and all its parents is already uptodate. */
INTERVAL
-update_interval (register INTERVAL i, EMACS_INT pos)
+update_interval (register INTERVAL i, ptrdiff_t pos)
{
if (NULL_INTERVAL_P (i))
return NULL_INTERVAL;
i = i->right; /* Move to the right child */
}
else if (NULL_PARENT (i))
- error ("Point %"pI"d after end of properties", pos);
+ error ("Point %"pD"d after end of properties", pos);
else
i = INTERVAL_PARENT (i);
continue;
}
}
-\f
-#if 0
-/* Traverse a path down the interval tree TREE to the interval
- containing POSITION, adjusting all nodes on the path for
- an addition of LENGTH characters. Insertion between two intervals
- (i.e., point == i->position, where i is second interval) means
- text goes into second interval.
-
- Modifications are needed to handle the hungry bits -- after simply
- finding the interval at position (don't add length going down),
- if it's the beginning of the interval, get the previous interval
- and check the hungry bits of both. Then add the length going back up
- to the root. */
-
-static INTERVAL
-adjust_intervals_for_insertion (INTERVAL tree, EMACS_INT position,
- EMACS_INT length)
-{
- register EMACS_INT relative_position;
- register INTERVAL this;
-
- if (TOTAL_LENGTH (tree) == 0) /* Paranoia */
- abort ();
-
- /* If inserting at point-max of a buffer, that position
- will be out of range */
- if (position > TOTAL_LENGTH (tree))
- position = TOTAL_LENGTH (tree);
- relative_position = position;
- this = tree;
-
- while (1)
- {
- if (relative_position <= LEFT_TOTAL_LENGTH (this))
- {
- this->total_length += length;
- CHECK_TOTAL_LENGTH (this);
- this = this->left;
- }
- else if (relative_position > (TOTAL_LENGTH (this)
- - RIGHT_TOTAL_LENGTH (this)))
- {
- relative_position -= (TOTAL_LENGTH (this)
- - RIGHT_TOTAL_LENGTH (this));
- this->total_length += length;
- CHECK_TOTAL_LENGTH (this);
- this = this->right;
- }
- else
- {
- /* If we are to use zero-length intervals as buffer pointers,
- then this code will have to change. */
- this->total_length += length;
- CHECK_TOTAL_LENGTH (this);
- this->position = LEFT_TOTAL_LENGTH (this)
- + position - relative_position + 1;
- return tree;
- }
- }
-}
-#endif
-
/* Effect an adjustment corresponding to the addition of LENGTH characters
of text. Do this by finding the interval containing POSITION in the
interval tree TREE, and then adjusting all of its ancestors by adding
static INTERVAL
adjust_intervals_for_insertion (INTERVAL tree,
- EMACS_INT position, EMACS_INT length)
+ ptrdiff_t position, ptrdiff_t length)
{
register INTERVAL i;
register INTERVAL temp;
int eobp = 0;
Lisp_Object parent;
- EMACS_INT offset;
+ ptrdiff_t offset;
- if (TOTAL_LENGTH (tree) == 0) /* Paranoia */
- abort ();
+ eassert (TOTAL_LENGTH (tree) > 0);
GET_INTERVAL_OBJECT (parent, tree);
offset = (BUFFERP (parent) ? BUF_BEG (XBUFFER (parent)) : 0);
Lisp_Object pleft, pright;
struct interval newi;
+ RESET_INTERVAL (&newi);
pleft = NULL_INTERVAL_P (prev) ? Qnil : prev->plist;
pright = NULL_INTERVAL_P (i) ? Qnil : i->plist;
newi.plist = merge_properties_sticky (pleft, pright);
delete_node (register INTERVAL i)
{
register INTERVAL migrate, this;
- register EMACS_INT migrate_amt;
+ register ptrdiff_t migrate_amt;
if (NULL_INTERVAL_P (i->left))
return i->right;
delete_interval (register INTERVAL i)
{
register INTERVAL parent;
- EMACS_INT amt = LENGTH (i);
+ ptrdiff_t amt = LENGTH (i);
- if (amt > 0) /* Only used on zero-length intervals now. */
- abort ();
+ eassert (amt == 0); /* Only used on zero-length intervals now. */
if (ROOT_INTERVAL_P (i))
{
Do this by recursing down TREE to the interval in question, and
deleting the appropriate amount of text. */
-static EMACS_INT
-interval_deletion_adjustment (register INTERVAL tree, register EMACS_INT from,
- register EMACS_INT amount)
+static ptrdiff_t
+interval_deletion_adjustment (register INTERVAL tree, register ptrdiff_t from,
+ register ptrdiff_t amount)
{
- register EMACS_INT relative_position = from;
+ register ptrdiff_t relative_position = from;
if (NULL_INTERVAL_P (tree))
return 0;
- /* Left branch */
+ /* Left branch. */
if (relative_position < LEFT_TOTAL_LENGTH (tree))
{
- EMACS_INT subtract = interval_deletion_adjustment (tree->left,
+ ptrdiff_t subtract = interval_deletion_adjustment (tree->left,
relative_position,
amount);
tree->total_length -= subtract;
CHECK_TOTAL_LENGTH (tree);
return subtract;
}
- /* Right branch */
+ /* Right branch. */
else if (relative_position >= (TOTAL_LENGTH (tree)
- RIGHT_TOTAL_LENGTH (tree)))
{
- EMACS_INT subtract;
+ ptrdiff_t subtract;
relative_position -= (tree->total_length
- RIGHT_TOTAL_LENGTH (tree));
else
{
/* How much can we delete from this interval? */
- EMACS_INT my_amount = ((tree->total_length
+ ptrdiff_t my_amount = ((tree->total_length
- RIGHT_TOTAL_LENGTH (tree))
- relative_position);
static void
adjust_intervals_for_deletion (struct buffer *buffer,
- EMACS_INT start, EMACS_INT length)
+ ptrdiff_t start, ptrdiff_t length)
{
- register EMACS_INT left_to_delete = length;
+ register ptrdiff_t left_to_delete = length;
register INTERVAL tree = BUF_INTERVALS (buffer);
Lisp_Object parent;
- EMACS_INT offset;
+ ptrdiff_t offset;
GET_INTERVAL_OBJECT (parent, tree);
offset = (BUFFERP (parent) ? BUF_BEG (XBUFFER (parent)) : 0);
if (NULL_INTERVAL_P (tree))
return;
- if (start > offset + TOTAL_LENGTH (tree)
- || start + length > offset + TOTAL_LENGTH (tree))
- abort ();
+ eassert (start <= offset + TOTAL_LENGTH (tree)
+ && start + length <= offset + TOTAL_LENGTH (tree));
if (length == TOTAL_LENGTH (tree))
{
compiler that does not allow calling a static function (here,
adjust_intervals_for_deletion) from a non-static inline function. */
-static inline void
-static_offset_intervals (struct buffer *buffer, EMACS_INT start,
- EMACS_INT length)
+void
+offset_intervals (struct buffer *buffer, ptrdiff_t start, ptrdiff_t length)
{
if (NULL_INTERVAL_P (BUF_INTERVALS (buffer)) || length == 0)
return;
adjust_intervals_for_insertion (BUF_INTERVALS (buffer), start, length);
else
{
- IF_LINT (if (length < - TYPE_MAXIMUM (EMACS_INT)) abort ();)
+ IF_LINT (if (length < - TYPE_MAXIMUM (ptrdiff_t)) abort ();)
adjust_intervals_for_deletion (buffer, start, -length);
}
}
-
-inline void
-offset_intervals (struct buffer *buffer, EMACS_INT start, EMACS_INT length)
-{
- static_offset_intervals (buffer, start, length);
-}
\f
/* Merge interval I with its lexicographic successor. The resulting
interval is returned, and has the properties of the original
static INTERVAL
merge_interval_right (register INTERVAL i)
{
- register EMACS_INT absorb = LENGTH (i);
+ register ptrdiff_t absorb = LENGTH (i);
register INTERVAL successor;
- /* Zero out this interval. */
- i->total_length -= absorb;
- CHECK_TOTAL_LENGTH (i);
-
/* Find the succeeding interval. */
if (! NULL_RIGHT_CHILD (i)) /* It's below us. Add absorb
as we descend. */
return successor;
}
+ /* Zero out this interval. */
+ i->total_length -= absorb;
+ CHECK_TOTAL_LENGTH (i);
+
successor = i;
while (! NULL_PARENT (successor)) /* It's above us. Subtract as
we ascend. */
INTERVAL
merge_interval_left (register INTERVAL i)
{
- register EMACS_INT absorb = LENGTH (i);
+ register ptrdiff_t absorb = LENGTH (i);
register INTERVAL predecessor;
- /* Zero out this interval. */
- i->total_length -= absorb;
- CHECK_TOTAL_LENGTH (i);
-
/* Find the preceding interval. */
if (! NULL_LEFT_CHILD (i)) /* It's below us. Go down,
adding ABSORB as we go. */
return predecessor;
}
+ /* Zero out this interval. */
+ i->total_length -= absorb;
+ CHECK_TOTAL_LENGTH (i);
+
predecessor = i;
while (! NULL_PARENT (predecessor)) /* It's above us. Go up,
- subtracting ABSORB. */
+ subtracting ABSORB. */
{
if (AM_RIGHT_CHILD (predecessor))
{
return t;
}
-
-#if 0
-/* Nobody calls this. Perhaps it's a vestige of an earlier design. */
-
-/* Make a new interval of length LENGTH starting at START in the
- group of intervals INTERVALS, which is actually an interval tree.
- Returns the new interval.
-
- Generate an error if the new positions would overlap an existing
- interval. */
-
-static INTERVAL
-make_new_interval (INTERVAL intervals, EMACS_INT start, EMACS_INT length)
-{
- INTERVAL slot;
-
- slot = find_interval (intervals, start);
- if (start + length > slot->position + LENGTH (slot))
- error ("Interval would overlap");
-
- if (start == slot->position && length == LENGTH (slot))
- return slot;
-
- if (slot->position == start)
- {
- /* New right node. */
- split_interval_right (slot, length);
- return slot;
- }
-
- if (slot->position + LENGTH (slot) == start + length)
- {
- /* New left node. */
- split_interval_left (slot, LENGTH (slot) - length);
- return slot;
- }
-
- /* Convert interval SLOT into three intervals. */
- split_interval_left (slot, start - slot->position);
- split_interval_right (slot, length);
- return slot;
-}
-#endif
\f
/* Insert the intervals of SOURCE into BUFFER at POSITION.
LENGTH is the length of the text in SOURCE.
text... */
void
-graft_intervals_into_buffer (INTERVAL source, EMACS_INT position,
- EMACS_INT length, struct buffer *buffer,
+graft_intervals_into_buffer (INTERVAL source, ptrdiff_t position,
+ ptrdiff_t length, struct buffer *buffer,
int inherit)
{
register INTERVAL under, over, this;
register INTERVAL tree;
- EMACS_INT over_used;
+ ptrdiff_t over_used;
tree = BUF_INTERVALS (buffer);
Qnil, buf, 0);
}
if (! NULL_INTERVAL_P (BUF_INTERVALS (buffer)))
- /* Shouldn't be necessary. -stef */
+ /* Shouldn't be necessary. --Stef */
BUF_INTERVALS (buffer) = balance_an_interval (BUF_INTERVALS (buffer));
return;
}
- if (NULL_INTERVAL_P (tree))
- {
- /* The inserted text constitutes the whole buffer, so
+ eassert (length == TOTAL_LENGTH (source));
+
+ if ((BUF_Z (buffer) - BUF_BEG (buffer)) == length)
+ { /* The inserted text constitutes the whole buffer, so
simply copy over the interval structure. */
- if ((BUF_Z (buffer) - BUF_BEG (buffer)) == TOTAL_LENGTH (source))
- {
Lisp_Object buf;
XSETBUFFER (buf, buffer);
BUF_INTERVALS (buffer) = reproduce_tree_obj (source, buf);
- BUF_INTERVALS (buffer)->position = BEG;
- BUF_INTERVALS (buffer)->up_obj = 1;
-
- /* Explicitly free the old tree here? */
-
+ BUF_INTERVALS (buffer)->position = BUF_BEG (buffer);
+ eassert (BUF_INTERVALS (buffer)->up_obj == 1);
return;
}
-
- /* Create an interval tree in which to place a copy
+ else if (NULL_INTERVAL_P (tree))
+ { /* Create an interval tree in which to place a copy
of the intervals of the inserted string. */
- {
Lisp_Object buf;
XSETBUFFER (buf, buffer);
tree = create_root_interval (buf);
}
- }
- else if (TOTAL_LENGTH (tree) == TOTAL_LENGTH (source))
- /* If the buffer contains only the new string, but
- there was already some interval tree there, then it may be
- some zero length intervals. Eventually, do something clever
- about inserting properly. For now, just waste the old intervals. */
- {
- BUF_INTERVALS (buffer) = reproduce_tree (source, INTERVAL_PARENT (tree));
- BUF_INTERVALS (buffer)->position = BEG;
- BUF_INTERVALS (buffer)->up_obj = 1;
- /* Explicitly free the old tree here. */
-
- return;
- }
- /* Paranoia -- the text has already been added, so this buffer
- should be of non-zero length. */
- else if (TOTAL_LENGTH (tree) == 0)
- abort ();
+ /* Paranoia -- the text has already been added, so
+ this buffer should be of non-zero length. */
+ eassert (TOTAL_LENGTH (tree) > 0);
this = under = find_interval (tree, position);
- if (NULL_INTERVAL_P (under)) /* Paranoia */
- abort ();
+ eassert (!NULL_INTERVAL_P (under));
over = find_interval (source, interval_start_pos (source));
/* Here for insertion in the middle of an interval.
/* Set point in BUFFER "temporarily" to CHARPOS, which corresponds to
byte position BYTEPOS. */
-inline void
+void
temp_set_point_both (struct buffer *buffer,
- EMACS_INT charpos, EMACS_INT bytepos)
+ ptrdiff_t charpos, ptrdiff_t bytepos)
{
/* In a single-byte buffer, the two positions must be equal. */
- if (BUF_ZV (buffer) == BUF_ZV_BYTE (buffer)
- && charpos != bytepos)
- abort ();
+ if (BUF_ZV (buffer) == BUF_ZV_BYTE (buffer))
+ eassert (charpos == bytepos);
- if (charpos > bytepos)
- abort ();
-
- if (charpos > BUF_ZV (buffer) || charpos < BUF_BEGV (buffer))
- abort ();
+ eassert (charpos <= bytepos);
+ eassert (charpos <= BUF_ZV (buffer) || BUF_BEGV (buffer) <= charpos);
SET_BUF_PT_BOTH (buffer, charpos, bytepos);
}
/* Set point "temporarily", without checking any text properties. */
-inline void
-temp_set_point (struct buffer *buffer, EMACS_INT charpos)
+void
+temp_set_point (struct buffer *buffer, ptrdiff_t charpos)
{
temp_set_point_both (buffer, charpos,
buf_charpos_to_bytepos (buffer, charpos));
before an intangible character, move to an ok place. */
void
-set_point (EMACS_INT charpos)
+set_point (ptrdiff_t charpos)
{
set_point_both (charpos, buf_charpos_to_bytepos (current_buffer, charpos));
}
current buffer, and the invisible property has a `stickiness' such that
inserting a character at position POS would inherit the property it,
return POS + ADJ, otherwise return POS. If TEST_INTANG is non-zero,
- then intangibility is required as well as invisibleness.
+ then intangibility is required as well as invisibility.
TEST_OFFS should be either 0 or -1, and ADJ should be either 1 or -1.
Note that `stickiness' is determined by overlay marker insertion types,
if the invisible property comes from an overlay. */
-static EMACS_INT
-adjust_for_invis_intang (EMACS_INT pos, EMACS_INT test_offs, EMACS_INT adj,
+static ptrdiff_t
+adjust_for_invis_intang (ptrdiff_t pos, ptrdiff_t test_offs, ptrdiff_t adj,
int test_intang)
{
Lisp_Object invis_propval, invis_overlay;
before an intangible character, move to an ok place. */
void
-set_point_both (EMACS_INT charpos, EMACS_INT bytepos)
+set_point_both (ptrdiff_t charpos, ptrdiff_t bytepos)
{
register INTERVAL to, from, toprev, fromprev;
- EMACS_INT buffer_point;
- EMACS_INT old_position = PT;
+ ptrdiff_t buffer_point;
+ ptrdiff_t old_position = PT;
/* This ensures that we move forward past intangible text when the
initial position is the same as the destination, in the rare
instances where this is important, e.g. in line-move-finish
(simple.el). */
int backwards = (charpos < old_position ? 1 : 0);
int have_overlays;
- EMACS_INT original_position;
+ ptrdiff_t original_position;
BVAR (current_buffer, point_before_scroll) = Qnil;
segment that reaches all the way to point. */
void
-move_if_not_intangible (EMACS_INT position)
+move_if_not_intangible (ptrdiff_t position)
{
Lisp_Object pos;
Lisp_Object intangible_propval;
nil means the current buffer. */
int
-get_property_and_range (EMACS_INT pos, Lisp_Object prop, Lisp_Object *val,
- EMACS_INT *start, EMACS_INT *end, Lisp_Object object)
+get_property_and_range (ptrdiff_t pos, Lisp_Object prop, Lisp_Object *val,
+ ptrdiff_t *start, ptrdiff_t *end, Lisp_Object object)
{
INTERVAL i, prev, next;
POSITION must be in the accessible part of BUFFER. */
Lisp_Object
-get_local_map (register EMACS_INT position, register struct buffer *buffer,
+get_local_map (register ptrdiff_t position, register struct buffer *buffer,
Lisp_Object type)
{
Lisp_Object prop, lispy_position, lispy_buffer;
- EMACS_INT old_begv, old_zv, old_begv_byte, old_zv_byte;
+ ptrdiff_t old_begv, old_zv, old_begv_byte, old_zv_byte;
/* Perhaps we should just change `position' to the limit. */
if (position > BUF_ZV (buffer) || position < BUF_BEGV (buffer))
The new interval tree has no parent and has a starting-position of 0. */
INTERVAL
-copy_intervals (INTERVAL tree, EMACS_INT start, EMACS_INT length)
+copy_intervals (INTERVAL tree, ptrdiff_t start, ptrdiff_t length)
{
register INTERVAL i, new, t;
- register EMACS_INT got, prevlen;
+ register ptrdiff_t got, prevlen;
if (NULL_INTERVAL_P (tree) || length <= 0)
return NULL_INTERVAL;
i = find_interval (tree, start);
- if (NULL_INTERVAL_P (i) || LENGTH (i) == 0)
- abort ();
+ eassert (!NULL_INTERVAL_P (i) && LENGTH (i) > 0);
/* If there is only one interval and it's the default, return nil. */
if ((start - i->position + 1 + length) < LENGTH (i)
/* Give STRING the properties of BUFFER from POSITION to LENGTH. */
-inline void
+void
copy_intervals_to_string (Lisp_Object string, struct buffer *buffer,
- EMACS_INT position, EMACS_INT length)
+ ptrdiff_t position, ptrdiff_t length)
{
INTERVAL interval_copy = copy_intervals (BUF_INTERVALS (buffer),
position, length);
compare_string_intervals (Lisp_Object s1, Lisp_Object s2)
{
INTERVAL i1, i2;
- EMACS_INT pos = 0;
- EMACS_INT end = SCHARS (s1);
+ ptrdiff_t pos = 0;
+ ptrdiff_t end = SCHARS (s1);
i1 = find_interval (STRING_INTERVALS (s1), 0);
i2 = find_interval (STRING_INTERVALS (s2), 0);
while (pos < end)
{
/* Determine how far we can go before we reach the end of I1 or I2. */
- EMACS_INT len1 = (i1 != 0 ? INTERVAL_LAST_POS (i1) : end) - pos;
- EMACS_INT len2 = (i2 != 0 ? INTERVAL_LAST_POS (i2) : end) - pos;
- EMACS_INT distance = min (len1, len2);
+ ptrdiff_t len1 = (i1 != 0 ? INTERVAL_LAST_POS (i1) : end) - pos;
+ ptrdiff_t len2 = (i2 != 0 ? INTERVAL_LAST_POS (i2) : end) - pos;
+ ptrdiff_t distance = min (len1, len2);
/* If we ever find a mismatch between the strings,
they differ. */
static void
set_intervals_multibyte_1 (INTERVAL i, int multi_flag,
- EMACS_INT start, EMACS_INT start_byte,
- EMACS_INT end, EMACS_INT end_byte)
+ ptrdiff_t start, ptrdiff_t start_byte,
+ ptrdiff_t end, ptrdiff_t end_byte)
{
/* Fix the length of this interval. */
if (multi_flag)
/* Recursively fix the length of the subintervals. */
if (i->left)
{
- EMACS_INT left_end, left_end_byte;
+ ptrdiff_t left_end, left_end_byte;
if (multi_flag)
{
- EMACS_INT temp;
+ ptrdiff_t temp;
left_end_byte = start_byte + LEFT_TOTAL_LENGTH (i);
left_end = BYTE_TO_CHAR (left_end_byte);
}
if (i->right)
{
- EMACS_INT right_start_byte, right_start;
+ ptrdiff_t right_start_byte, right_start;
if (multi_flag)
{
- EMACS_INT temp;
+ ptrdiff_t temp;
right_start_byte = end_byte - RIGHT_TOTAL_LENGTH (i);
right_start = BYTE_TO_CHAR (right_start_byte);