static void axis_insert (struct axis *,
unsigned long int log_start,
unsigned long int phy_start,
- unsigned long int cnt);
+ unsigned long int n);
static void axis_remove (struct axis *,
- unsigned long int start, unsigned long int cnt);
+ unsigned long int start, unsigned long int n);
static void axis_move (struct axis *,
unsigned long int old_start,
unsigned long int new_start,
- unsigned long int cnt);
+ unsigned long int n);
static struct source *source_create_empty (size_t n_bytes);
static struct source *source_create_casereader (struct casereader *);
return rw_case (ds, OP_WRITE, row, column, 1, (union value *) value);
}
-/* Inserts the CNT cases at C into datasheet DS just before row
+/* Inserts the N cases at C into datasheet DS just before row
BEFORE. Returns true if successful, false on I/O error. On
failure, datasheet DS is not modified.
bool
datasheet_insert_rows (struct datasheet *ds,
casenumber before, struct ccase *c[],
- casenumber cnt)
+ casenumber n)
{
casenumber added = 0;
- while (cnt > 0)
+ while (n > 0)
{
unsigned long first_phy;
unsigned long n_phys;
/* Allocate physical rows from the pool of available
rows. */
- if (!axis_allocate (ds->rows, cnt, &first_phy, &n_phys))
+ if (!axis_allocate (ds->rows, n, &first_phy, &n_phys))
{
/* No rows were available. Extend the row axis to make
some new ones available. */
- n_phys = cnt;
- first_phy = axis_extend (ds->rows, cnt);
+ n_phys = n;
+ first_phy = axis_extend (ds->rows, n);
}
/* Insert the new rows into the row mapping. */
for (i = 0; i < n_phys; i++)
if (!datasheet_put_row (ds, before + i, c[i]))
{
- while (++i < cnt)
+ while (++i < n)
case_unref (c[i]);
datasheet_delete_rows (ds, before - added, n_phys + added);
return false;
/* Advance. */
c += n_phys;
- cnt -= n_phys;
+ n -= n_phys;
before += n_phys;
added += n_phys;
}
return true;
}
-/* Deletes the CNT rows in DS starting from row FIRST. */
+/* Deletes the N rows in DS starting from row FIRST. */
void
datasheet_delete_rows (struct datasheet *ds,
- casenumber first, casenumber cnt)
+ casenumber first, casenumber n)
{
size_t lrow;
/* Free up rows for reuse.
FIXME: optimize. */
- for (lrow = first; lrow < first + cnt; lrow++)
+ for (lrow = first; lrow < first + n; lrow++)
axis_make_available (ds->rows, axis_map (ds->rows, lrow), 1);
/* Remove rows from logical-to-physical mapping. */
- axis_remove (ds->rows, first, cnt);
+ axis_remove (ds->rows, first, n);
}
-/* Moves the CNT rows in DS starting at position OLD_START so
+/* Moves the N rows in DS starting at position OLD_START so
that they then start at position NEW_START. Equivalent to
deleting the given rows, then inserting them at what becomes
position NEW_START after the deletion. */
void
datasheet_move_rows (struct datasheet *ds,
size_t old_start, size_t new_start,
- size_t cnt)
+ size_t n)
{
- axis_move (ds->rows, old_start, new_start, cnt);
+ axis_move (ds->rows, old_start, new_start, n);
}
\f
static const struct casereader_random_class datasheet_reader_class;
return tower_height (&axis->log_to_phy);
}
-/* Inserts the CNT contiguous physical ordinates starting at
+/* Inserts the N contiguous physical ordinates starting at
PHY_START into AXIS's logical-to-physical mapping, starting at
logical position LOG_START. */
static void
axis_insert (struct axis *axis,
unsigned long int log_start, unsigned long int phy_start,
- unsigned long int cnt)
+ unsigned long int n)
{
struct tower_node *before = split_axis (axis, log_start);
struct tower_node *new = make_axis_group (phy_start);
- tower_insert (&axis->log_to_phy, cnt, new, before);
+ tower_insert (&axis->log_to_phy, n, new, before);
merge_axis_nodes (axis, new, NULL);
check_axis_merged (axis);
}
-/* Removes CNT ordinates from AXIS's logical-to-physical mapping
+/* Removes N ordinates from AXIS's logical-to-physical mapping
starting at logical position START. */
static void
axis_remove (struct axis *axis,
- unsigned long int start, unsigned long int cnt)
+ unsigned long int start, unsigned long int n)
{
- if (cnt > 0)
+ if (n > 0)
{
- struct tower_node *last = split_axis (axis, start + cnt);
+ struct tower_node *last = split_axis (axis, start + n);
struct tower_node *cur, *next;
for (cur = split_axis (axis, start); cur != last; cur = next)
{
}
}
-/* Moves the CNT ordinates in AXIS's logical-to-mapping starting
+/* Moves the N ordinates in AXIS's logical-to-mapping starting
at logical position OLD_START so that they then start at
position NEW_START. */
static void
axis_move (struct axis *axis,
unsigned long int old_start, unsigned long int new_start,
- unsigned long int cnt)
+ unsigned long int n)
{
- if (cnt > 0 && old_start != new_start)
+ if (n > 0 && old_start != new_start)
{
struct tower_node *old_first, *old_last, *new_first;
struct tower_node *merge1, *merge2;
struct tower tmp_array;
- /* Move ordinates OLD_START...(OLD_START + CNT) into new,
+ /* Move ordinates OLD_START...(OLD_START + N) into new,
separate TMP_ARRAY. */
old_first = split_axis (axis, old_start);
- old_last = split_axis (axis, old_start + cnt);
+ old_last = split_axis (axis, old_start + n);
tower_init (&tmp_array);
tower_splice (&tmp_array, NULL,
&axis->log_to_phy, old_first, old_last);
return true;
}
-/* Within SOURCE, which must not have a backing casereader,
- writes the VALUE_CNT values in VALUES_CNT to the VALUE_CNT
- columns starting from START_COLUMN, in every row, even in rows
- not yet otherwise initialized. Returns true if successful,
- false if an I/O error occurs.
-
- We don't support backing != NULL because (1) it's harder and
- (2) this function is only called by
- datasheet_insert_column, which doesn't reuse columns from
- sources that are backed by casereaders. */
static bool
source_write_column (struct column *column, const union value *value)
{
projects / pspp / blobdiff