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authorChristopher James Lahey <clahey@helixcode.com>2000-05-04 08:59:10 +0800
committerChris Lahey <clahey@src.gnome.org>2000-05-04 08:59:10 +0800
commitf4204133d9aad47020037bedafe2c08821b85cdf (patch)
tree47baef3825c578d77d6fda17f9ca01f6311b6593 /widgets/e-table
parent460048da687dd596900edb0677a7232e22a862fa (diff)
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Changed the insert sort to be binary instead of linear.
2000-05-04 Christopher James Lahey <clahey@helixcode.com> * e-table-sorted-variable.c: Changed the insert sort to be binary instead of linear. svn path=/trunk/; revision=2784
Diffstat (limited to 'widgets/e-table')
-rw-r--r--widgets/e-table/ChangeLog5
-rw-r--r--widgets/e-table/e-table-sorted-variable.c81
2 files changed, 57 insertions, 29 deletions
diff --git a/widgets/e-table/ChangeLog b/widgets/e-table/ChangeLog
index 8baf423c5d..3939f479cc 100644
--- a/widgets/e-table/ChangeLog
+++ b/widgets/e-table/ChangeLog
@@ -1,3 +1,8 @@
+2000-05-04 Christopher James Lahey <clahey@helixcode.com>
+
+ * e-table-sorted-variable.c: Changed the insert sort to be binary
+ instead of linear.
+
2000-05-02 Matt Loper <matt@helixcode.com>
* Makefile.am: set G_LOG_DOMAIN.
diff --git a/widgets/e-table/e-table-sorted-variable.c b/widgets/e-table/e-table-sorted-variable.c
index 00b8b6af71..79840cc259 100644
--- a/widgets/e-table/e-table-sorted-variable.c
+++ b/widgets/e-table/e-table-sorted-variable.c
@@ -16,7 +16,7 @@
#define PARENT_TYPE E_TABLE_SUBSET_VARIABLE_TYPE
-#define INCREMENT_AMOUNT 10
+#define INCREMENT_AMOUNT 100
static ETableSubsetVariableClass *etsv_parent_class;
@@ -67,6 +67,45 @@ etsv_class_init (GtkObjectClass *object_class)
E_MAKE_TYPE(e_table_sorted_variable, "ETableSortedVariable", ETableSortedVariable, etsv_class_init, NULL, PARENT_TYPE);
+static int
+etsv_compare(ETableSortedVariable *etsv,
+ gint row1,
+ gint row2)
+{
+ static ETableCol *last_col = NULL;
+ static int last_row = -1;
+ static void *val = NULL;
+ ETableSubset *etss = E_TABLE_SUBSET(etsv);
+ int j;
+ int sort_count = e_table_sort_info_sorting_get_count(etsv->sort_info);
+ int comp_val = 0;
+ int ascending = 1;
+ for (j = 0; j < sort_count; j++) {
+ ETableSortColumn column = e_table_sort_info_sorting_get_nth(etsv->sort_info, j);
+ ETableCol *col;
+ if (column.column > e_table_header_count (etsv->full_header))
+ col = e_table_header_get_columns (etsv->full_header)[e_table_header_count (etsv->full_header) - 1];
+ else
+ col = e_table_header_get_columns (etsv->full_header)[column.column];
+ if (last_col != col || last_row != row1)
+ val = e_table_model_value_at (etss->source, col->col_idx, row1);
+ last_col = col;
+ comp_val = (*col->compare)(val, e_table_model_value_at (etss->source, col->col_idx, row2));
+ ascending = column.ascending;
+ if (comp_val != 0)
+ break;
+ }
+ if (comp_val == 0) {
+ if (row1 < row2)
+ comp_val = -1;
+ if (row1 > row2)
+ comp_val = 1;
+ }
+ if (!ascending)
+ comp_val = -comp_val;
+ return comp_val;
+}
+
static void
etsv_add (ETableSubsetVariable *etssv,
gint row)
@@ -75,40 +114,24 @@ etsv_add (ETableSubsetVariable *etssv,
ETableSubset *etss = E_TABLE_SUBSET(etssv);
ETableSortedVariable *etsv = E_TABLE_SORTED_VARIABLE(etssv);
int i;
- ETableCol *last_col = NULL;
- void *val = NULL;
+ int length_to_search;
/* FIXME: binary search anyone? */
- for (i = 0; i < etss->n_map; i++){
- int j;
- int sort_count = e_table_sort_info_sorting_get_count(etsv->sort_info);
- int comp_val = 0;
- int ascending = 1;
- for (j = 0; j < sort_count; j++) {
- ETableSortColumn column = e_table_sort_info_sorting_get_nth(etsv->sort_info, j);
- ETableCol *col;
- if (column.column > e_table_header_count (etsv->full_header))
- col = e_table_header_get_columns (etsv->full_header)[e_table_header_count (etsv->full_header) - 1];
- else
- col = e_table_header_get_columns (etsv->full_header)[column.column];
- if (last_col != col)
- val = e_table_model_value_at (etss->source, col->col_idx, row);
- last_col = col;
- comp_val = (*col->compare)(val, e_table_model_value_at (etss->source, col->col_idx, etss->map_table[i]));
- ascending = column.ascending;
- if (comp_val != 0)
- break;
+
+ i = 0;
+ length_to_search = etss->n_map;
+ while(length_to_search > 1) {
+ int center = i + length_to_search / 2;
+ if (etsv_compare(etsv, row, etss->map_table[center]))
+ length_to_search /= 2;
+ else {
+ i += length_to_search / 2;
+ length_to_search -= length_to_search / 2;
}
- if (((ascending && comp_val < 0) || ((!ascending) && comp_val > 0)))
- break;
-
- if (comp_val == 0)
- if ((ascending && row < etss->map_table[i]) || ((!ascending) && row > etss->map_table[i]))
- break;
}
if (etss->n_map + 1 > etssv->n_vals_allocated){
- etss->map_table = g_realloc (etss->map_table, (etssv->n_vals_allocated + INCREMENT_AMOUNT) * sizeof(int));
etssv->n_vals_allocated += INCREMENT_AMOUNT;
+ etss->map_table = g_realloc (etss->map_table, (etssv->n_vals_allocated) * sizeof(int));
}
if (i < etss->n_map)
memmove (etss->map_table + i + 1, etss->map_table + i, (etss->n_map - i) * sizeof(int));