1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2017-2018 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 #ifndef OUTPUT_PIVOT_TABLE_H
18 #define OUTPUT_PIVOT_TABLE_H 1
22 #include "data/format.h"
23 #include "data/settings.h"
24 #include "libpspp/compiler.h"
25 #include "libpspp/hmap.h"
26 #include "output/table.h"
34 Pivot tables are PSPP's primary form of output. They are analogous to the
35 pivot tables you might be familiar with from spreadsheets and databases.
36 See https://en.wikipedia.org/wiki/Pivot_table for a brief introduction to
37 the overall concept of a pivot table.
39 In PSPP, the most important internal pieces of a pivot table are:
41 - Title. Every pivot table has a title that is displayed above it. It also
42 has an optional caption (displayed below it) and corner text (displayed in
43 the upper left corner).
45 - Dimensions. A dimension consists of zero or more categories. A category
46 has a label, such as "df" or "Asymp. Sig." or 123 or a variable name. The
47 categories are the leaves of a tree whose non-leaf nodes form groups of
48 categories. The tree always has a root group whose label is the name of
51 - Axes. A table has three axes: column, row, and layer. Each dimension is
52 assigned to an axis, and each axis has zero or more dimensions. When an
53 axis has more than one dimension, they are ordered from innermost to
56 - Data. A table's data consists of zero or more cells. Each cell maps from
57 a category for each dimension to a value, which is commonly a number but
58 could also be a variable name or an arbitrary text string.
60 Creating a pivot table usually consists of the following steps:
62 1. Create the table with pivot_table_create(), passing in the title.
63 It's commonly useful to set up a few options at this point:
65 - If empty rows or columns should not be displayed, set ->omit_empty to
68 - Set the format to use for "count" values with
69 pivot_table_set_weight_var() or pivot_table_set_weight_format().
71 2. Create each dimension with pivot_dimension_create() and populate it with
72 categories and, possibly, with groups that contain the categories. This
73 call also assigns the dimension to an axis.
75 In simple cases, only a call to pivot_dimension_create() is needed.
76 Other functions such as pivot_category_create_group() can be used for
77 hierarchies of categories.
79 Sometimes it's easier to create categories in tandem with inserting data,
80 for example by adding a category for a variable just before inserting the
81 first cell for that variable. In that case, creating categories and
82 inserting data can be interleaved.
84 3. Insert data. For each cell, supply the category indexes, which are
85 assigned starting from 0 in the order in which the categories were
86 created in step 2, and the value to go in the cell. If the table has a
87 small, fixed number of dimensions, functions like, e.g.
88 pivot_table_put3() for 3 dimensions, can be used. The general function
89 pivot_table_put() works for other cases.
91 4. Output the table for user consumption. Use pivot_table_submit(). */
93 /* Pivot table display styling. */
95 /* Areas of a pivot table for styling purposes. */
100 PIVOT_AREA_FOOTER, /* Footnotes. */
101 PIVOT_AREA_CORNER, /* Top-left corner. */
102 PIVOT_AREA_COLUMN_LABELS,
103 PIVOT_AREA_ROW_LABELS,
105 PIVOT_AREA_LAYERS, /* Layer indication. */
109 const char *pivot_area_to_string (enum pivot_area);
111 /* Table borders for styling purposes. */
117 PIVOT_BORDER_OUTER_LEFT,
118 PIVOT_BORDER_OUTER_TOP,
119 PIVOT_BORDER_OUTER_RIGHT,
120 PIVOT_BORDER_OUTER_BOTTOM,
123 PIVOT_BORDER_INNER_LEFT,
124 PIVOT_BORDER_INNER_TOP,
125 PIVOT_BORDER_INNER_RIGHT,
126 PIVOT_BORDER_INNER_BOTTOM,
129 PIVOT_BORDER_DATA_LEFT,
130 PIVOT_BORDER_DATA_TOP,
133 PIVOT_BORDER_DIM_ROW_HORZ,
134 PIVOT_BORDER_DIM_ROW_VERT,
135 PIVOT_BORDER_DIM_COL_HORZ,
136 PIVOT_BORDER_DIM_COL_VERT,
139 PIVOT_BORDER_CAT_ROW_HORZ,
140 PIVOT_BORDER_CAT_ROW_VERT,
141 PIVOT_BORDER_CAT_COL_HORZ,
142 PIVOT_BORDER_CAT_COL_VERT,
147 const char *pivot_border_to_string (enum pivot_border);
149 /* Sizing for rows or columns of a rendered table. The comments below talk
150 about columns and their widths but they apply equally to rows and their
152 struct pivot_table_sizing
154 /* Specific column widths, in 1/96" units. */
158 /* Specific page breaks: 0-based columns after which a page break must
159 occur, e.g. a value of 1 requests a break after the second column. */
163 /* Keeps: columns to keep together on a page if possible. */
164 struct pivot_keep *keeps;
168 void pivot_table_sizing_uninit (struct pivot_table_sizing *);
170 /* A set of columns to keep together on a page if possible, e.g. ofs=1, n=10
171 requests keeping together the 2nd through 11th columns. */
174 size_t ofs; /* 0-based first column. */
175 size_t n; /* Number of columns. */
189 const char *pivot_axis_type_to_string (enum pivot_axis_type);
191 /* An axis within a pivot table. */
194 /* dimensions[0] is the innermost dimension,
195 dimensions[1] is the next outer dimension,
197 dimensions[n_dimensions - 1] is the outermost dimension. */
198 struct pivot_dimension **dimensions;
201 /* The number of rows or columns along the axis,
202 that is, the product of dimension[*]->n_leaves.
203 It is 0 if any dimension has 0 leaves. */
206 /* Sum of dimensions[*]->label_depth. */
210 /* Successively assigns to INDEXES (which should be a "size_t *") each of the
211 combinations of the categories in AXIS's dimensions, in lexicographic order
212 with the innermost dimension iterating most quickly.
214 The value assigned to INDEXES is dynamically allocated. If the client
215 breaks out of the loop prematurely, it needs to free it with free(). */
216 #define PIVOT_AXIS_FOR_EACH(INDEXES, AXIS) \
217 for ((INDEXES) = NULL; \
218 ((INDEXES) = pivot_axis_iterator_next (INDEXES, AXIS)) != NULL;)
219 size_t *pivot_axis_iterator_next (size_t *indexes, const struct pivot_axis *);
223 A pivot_dimension identifies the categories associated with a single
224 dimension within a multidimensional pivot table.
226 A dimension contains a collection of categories, which are the leaves in a
229 (A dimension or a group can contain zero categories, but this is unusual.
230 If a dimension contains no categories, then its table cannot contain any
233 struct pivot_dimension
235 /* table->axes[axis_type]->dimensions[level] == dimension. */
236 struct pivot_table *table;
237 enum pivot_axis_type axis_type;
238 size_t level; /* 0 for innermost dimension within axis. */
240 /* table->dimensions[top_index] == dimension. */
243 /* Hierarchy of categories within the dimension. The groups and categories
244 are sorted in the order that should be used for display. This might be
245 different from the original order produced for output if the user
248 The root must always be a group, although it is allowed to have no
250 struct pivot_category *root;
252 /* All of the leaves reachable via the root.
254 The indexing for presentation_leaves is presentation order, thus
255 presentation_leaves[i]->presentation_index == i. This order is the same
256 as would be produced by an in-order traversal of the groups. It is the
257 order into which the user reordered or sorted the categories.
259 The indexing for data_leaves is that used for idx[] in struct
260 pivot_cell, thus data_leaves[i]->data_index == i. This might differ
261 from what an in-order traversal of 'root' would yield, if the user
262 reordered categories. */
263 struct pivot_category **data_leaves;
264 struct pivot_category **presentation_leaves;
265 size_t n_leaves, allocated_leaves;
268 bool hide_all_labels;
270 /* Number of rows or columns needed to express the labels. */
274 struct pivot_dimension *pivot_dimension_create (
275 struct pivot_table *, enum pivot_axis_type, const char *name, ...)
277 #define pivot_dimension_create(...) \
278 pivot_dimension_create(__VA_ARGS__, NULL_SENTINEL)
279 struct pivot_dimension *pivot_dimension_create__ (struct pivot_table *,
280 enum pivot_axis_type,
281 struct pivot_value *name);
283 void pivot_dimension_destroy (struct pivot_dimension *);
285 void pivot_dimension_dump (const struct pivot_dimension *, int indentation);
287 /* A pivot_category is a leaf (a category) or a group:
289 - For a leaf, neither index is SIZE_MAX.
291 - For a group, both indexes are SIZE_MAX.
293 Do not use 'subs' or 'n_subs' to determine whether a category is a group,
294 because a group may (pathologically) have no leaves. */
295 struct pivot_category
297 struct pivot_value *name;
298 struct pivot_category *parent;
299 struct pivot_dimension *dimension;
300 size_t label_depth, extra_depth;
304 If show_label is true, then the group itself has a row (or a column)
305 giving the group's name. Otherwise, the group's own name is not
307 struct pivot_category **subs; /* Child categories or groups. */
308 size_t n_subs, allocated_subs;
309 bool show_label; /* Display a label for the group itself? */
310 bool show_label_in_corner;
313 struct fmt_spec format;
314 size_t group_index; /* In ->parent->subs[]. */
315 size_t data_index; /* In ->dimension->data_leaves[]. */
316 size_t presentation_index; /* In ->dimension->presentation_leaves[]. */
320 pivot_category_is_group (const struct pivot_category *category)
322 return category->data_index == SIZE_MAX;
326 pivot_category_is_leaf (const struct pivot_category *category)
328 return !pivot_category_is_group (category);
331 /* Creating leaf categories. */
332 int pivot_category_create_leaves (struct pivot_category *parent, ...)
334 #define pivot_category_create_leaves(...) \
335 pivot_category_create_leaves(__VA_ARGS__, NULL_SENTINEL)
337 int pivot_category_create_leaf (
338 struct pivot_category *parent, struct pivot_value *name);
339 int pivot_category_create_leaf_rc (
340 struct pivot_category *parent, struct pivot_value *name, const char *rc);
342 /* Creating category groups. */
343 struct pivot_category *pivot_category_create_group (
344 struct pivot_category *parent, const char *name, ...) SENTINEL (0);
345 #define pivot_category_create_group(...) \
346 pivot_category_create_group(__VA_ARGS__, NULL_SENTINEL)
347 struct pivot_category *pivot_category_create_group__ (
348 struct pivot_category *parent, struct pivot_value *name);
350 void pivot_category_destroy (struct pivot_category *);
352 /* Pivot result classes.
354 These are used to mark leaf categories as having particular types of data,
355 to set their numeric formats. The formats that actually get used for these
356 classes are in the result_classes[] global array in pivot-table.c, except
357 that PIVOT_RC_OTHER comes from settings_get_format() and PIVOT_RC_COUNT
358 should come from the weight variable in the dataset's dictionary. */
359 #define PIVOT_RC_OTHER ("RC_OTHER")
360 #define PIVOT_RC_INTEGER ("RC_INTEGER")
361 #define PIVOT_RC_CORRELATION ("RC_CORRELATIONS")
362 #define PIVOT_RC_SIGNIFICANCE ("RC_SIGNIFICANCE")
363 #define PIVOT_RC_PERCENT ("RC_PERCENT")
364 #define PIVOT_RC_RESIDUAL ("RC_RESIDUAL")
365 #define PIVOT_RC_COUNT ("RC_COUNT")
367 bool pivot_result_class_change (const char *, const struct fmt_spec *);
369 /* Styling for a pivot table.
371 The division between this and the style information in struct pivot_table
372 seems fairly arbitrary. The ultimate reason for the division is simply
373 because that's how SPSS documentation and file formats do it. */
374 struct pivot_table_look
376 /* Reference count. A pivot_table_look may be shared between multiple
377 owners, indicated by a reference count greater than 1. When this is the
378 case, the pivot_table must not be modified. */
381 char *name; /* May be null. */
383 /* General properties. */
385 bool row_labels_in_corner;
386 int width_ranges[TABLE_N_AXES][2]; /* In 1/96" units. */
388 /* Footnote display settings. */
389 bool show_numeric_markers;
390 bool footnote_marker_superscripts;
393 struct table_area_style areas[PIVOT_N_AREAS];
394 struct table_border_style borders[PIVOT_N_BORDERS];
396 /* Print settings. */
397 bool print_all_layers;
398 bool paginate_layers;
399 bool shrink_to_fit[TABLE_N_AXES];
400 bool top_continuation, bottom_continuation;
402 size_t n_orphan_lines;
405 const struct pivot_table_look *pivot_table_look_get_default (void);
406 void pivot_table_look_set_default (const struct pivot_table_look *);
408 char *pivot_table_look_read (const char *, struct pivot_table_look **)
411 const struct pivot_table_look *pivot_table_look_builtin_default (void);
412 struct pivot_table_look *pivot_table_look_new_builtin_default (void);
413 struct pivot_table_look *pivot_table_look_ref (
414 const struct pivot_table_look *);
415 void pivot_table_look_unref (struct pivot_table_look *);
416 struct pivot_table_look *pivot_table_look_unshare (struct pivot_table_look *);
418 /* A pivot table. See the top of this file for more information. */
421 /* Reference count. A pivot_table may be shared between multiple owners,
422 indicated by a reference count greater than 1. When this is the case,
423 the pivot_table must not be modified. */
427 struct pivot_table_look *look;
429 /* Display settings. */
430 bool rotate_inner_column_labels;
431 bool rotate_outer_row_labels;
432 bool show_grid_lines;
434 size_t *current_layer; /* axis[PIVOT_AXIS_LAYER].n_dimensions elements. */
435 enum settings_value_show show_values;
436 enum settings_value_show show_variables;
437 struct fmt_spec weight_format;
439 /* Column and row sizing and page breaks.
440 sizing[TABLE_HORZ] is for columns, sizing[TABLE_VERT] is for rows. */
441 struct pivot_table_sizing sizing[TABLE_N_AXES];
443 /* Format settings. */
445 char decimal; /* Usually ',' or '.'. */
446 char grouping; /* Usually '.' or ','. */
447 char *ccs[5]; /* Custom currency. */
450 /* Command information. */
451 char *command_local; /* May be NULL. */
452 char *command_c; /* May be NULL. */
453 char *language; /* May be NULL. */
454 char *locale; /* May be NULL. */
456 /* Source information. */
457 char *dataset; /* May be NULL. */
458 char *datafile; /* May be NULL. */
459 time_t date; /* May be 0 if unknown. */
462 struct pivot_footnote **footnotes;
463 size_t n_footnotes, allocated_footnotes;
466 struct pivot_value *title;
467 struct pivot_value *subtype; /* Same as spv_item's subtype. */
468 struct pivot_value *corner_text;
469 struct pivot_value *caption;
470 char *notes; /* Shown as tooltip. */
473 struct pivot_dimension **dimensions;
476 /* Allocation of dimensions to rows, columns, and layers. */
477 struct pivot_axis axes[PIVOT_N_AXES];
479 struct hmap cells; /* Contains "struct pivot_cell"s. */
482 /* Creating and destroy pivot tables. */
483 struct pivot_table *pivot_table_create (const char *title);
484 struct pivot_table *pivot_table_create__ (struct pivot_value *title,
485 const char *subtype);
486 struct pivot_table *pivot_table_create_for_text (struct pivot_value *title,
487 struct pivot_value *content);
489 struct pivot_table *pivot_table_ref (const struct pivot_table *);
490 void pivot_table_unref (struct pivot_table *);
491 bool pivot_table_is_shared (const struct pivot_table *);
494 const struct pivot_table_look *pivot_table_get_look (
495 const struct pivot_table *);
496 void pivot_table_set_look (struct pivot_table *,
497 const struct pivot_table_look *);
499 /* Format of PIVOT_RC_COUNT cells. */
500 void pivot_table_set_weight_var (struct pivot_table *,
501 const struct variable *);
502 void pivot_table_set_weight_format (struct pivot_table *,
503 const struct fmt_spec *);
506 bool pivot_table_is_empty (const struct pivot_table *);
509 void pivot_table_submit (struct pivot_table *);
512 void pivot_table_put (struct pivot_table *, const size_t *dindexes, size_t n,
513 struct pivot_value *);
514 void pivot_table_put1 (struct pivot_table *, size_t idx1,
515 struct pivot_value *);
516 void pivot_table_put2 (struct pivot_table *, size_t idx1, size_t idx2,
517 struct pivot_value *);
518 void pivot_table_put3 (struct pivot_table *, size_t idx1, size_t idx2,
519 size_t idx3, struct pivot_value *);
520 void pivot_table_put4 (struct pivot_table *, size_t idx1, size_t idx2,
521 size_t idx3, size_t idx4, struct pivot_value *);
523 const struct pivot_value *pivot_table_get (const struct pivot_table *,
524 const size_t *dindexes);
526 struct pivot_value *pivot_table_get_rw (struct pivot_table *,
527 const size_t *dindexes);
531 Use pivot_table_create_footnote() to create a footnote.
532 Use pivot_value_add_footnote() to add a reference to a footnote. */
533 struct pivot_footnote
536 struct pivot_value *content;
537 struct pivot_value *marker;
541 struct pivot_footnote *pivot_table_create_footnote (
542 struct pivot_table *, struct pivot_value *content);
543 struct pivot_footnote *pivot_table_create_footnote__ (
544 struct pivot_table *, size_t idx,
545 struct pivot_value *marker, struct pivot_value *content);
547 void pivot_footnote_destroy (struct pivot_footnote *);
550 void pivot_table_convert_indexes_ptod (const struct pivot_table *,
551 const size_t *pindexes[PIVOT_N_AXES],
553 size_t *pivot_table_enumerate_axis (const struct pivot_table *,
554 enum pivot_axis_type,
555 const size_t *layer_indexes,
556 bool omit_empty, size_t *n);
557 #define PIVOT_ENUMERATION_FOR_EACH(INDEXES, ENUMERATION, AXIS) \
558 for ((INDEXES) = (ENUMERATION); *(INDEXES) != SIZE_MAX; \
559 (INDEXES) += MAX (1, (AXIS)->n_dimensions))
561 void pivot_table_assign_label_depth (struct pivot_table *);
563 void pivot_table_dump (const struct pivot_table *, int indentation);
567 enum pivot_value_type
569 PIVOT_VALUE_NUMERIC, /* A value of a numeric variable. */
570 PIVOT_VALUE_STRING, /* A value of a string variable. */
571 PIVOT_VALUE_VARIABLE, /* Name of a variable. */
572 PIVOT_VALUE_TEXT, /* Text. */
573 PIVOT_VALUE_TEMPLATE, /* Templated text. */
576 /* A pivot_value is the content of a single pivot table cell. A pivot_value is
577 also a pivot table's title, caption, footnote marker and contents, and so
580 A given pivot_value is one of:
582 1. A number resulting from a calculation (PIVOT_VALUE_NUMERIC). Use
583 pivot_value_new_number() to create such a pivot_value.
585 A numeric pivot_value has an associated display format (usually an F or
586 PCT format). This format can be set directly on the pivot_value, but
587 that is not usually the easiest way. Instead, it is usually true that
588 all of the values in a single category should have the same format
589 (e.g. all "Significance" values might use format F40.3), so PSPP makes
590 it easy to set the default format for a category while creating the
591 category. See pivot_dimension_create() for more details.
593 For numbers that should be displayed as integers,
594 pivot_value_new_integer() can occasionally be a useful special case.
596 2. A numeric or string value obtained from data (PIVOT_VALUE_NUMERIC or
597 PIVOT_VALUE_STRING). If such a value corresponds to a variable, then the
598 variable's name can be attached to the pivot_value. If the value has a
599 value label, then that can also be attached. When a label is present,
600 the user can control whether to show the value or the label or both.
602 Use pivot_value_new_var_value() to create pivot_values of these kinds.
604 3. A variable name (PIVOT_VALUE_VARIABLE). The variable label, if any, can
605 be attached too, and again the user can control whether to show the value
606 or the label or both.
608 4. A text string (PIVOT_VALUE_TEXT). The value stores the string in English
609 and translated into the output language (localized). Use
610 pivot_value_new_text() or pivot_value_new_text_format() for those cases.
611 In some cases, only an English or a localized version is available for
612 one reason or another, although this is regrettable; in those cases, use
613 pivot_value_new_user_text() or pivot_value_new_user_text_nocopy().
615 (There is also a PIVOT_VALUE_TEMPLATE but PSPP does not yet create these
622 A pivot_value may reference any number of footnotes. Use
623 pivot_value_add_footnote() to add a footnote reference. The footnotes being
624 referenced must first be created with pivot_table_create_footnote().
630 A pivot_value can have specific font and cell styles. Only the user should
635 struct font_style *font_style;
636 struct cell_style *cell_style;
643 const struct pivot_footnote **footnotes;
646 enum pivot_value_type type;
649 /* PIVOT_VALUE_NUMERIC. */
652 double x; /* The numeric value. */
653 struct fmt_spec format; /* Format to display 'x'. */
654 char *var_name; /* May be NULL. */
655 char *value_label; /* May be NULL. */
656 enum settings_value_show show; /* Show value or label or both? */
660 /* PIVOT_VALUE_STRING. */
663 char *s; /* The string value. */
664 bool hex; /* Display in hex? */
665 char *var_name; /* May be NULL. */
666 char *value_label; /* May be NULL. */
667 enum settings_value_show show; /* Show value or label or both? */
671 /* PIVOT_VALUE_VARIABLE. */
675 char *var_label; /* May be NULL. */
676 enum settings_value_show show; /* Show name or label or both? */
680 /* PIVOT_VALUE_TEXT. */
683 char *local; /* Localized. */
684 char *c; /* English. */
685 char *id; /* Identifier. */
690 /* PIVOT_VALUE_TEMPLATE. */
693 char *local; /* Localized. */
694 char *id; /* Identifier. */
695 struct pivot_argument *args;
702 /* Numbers resulting from calculations. */
703 struct pivot_value *pivot_value_new_number (double);
704 struct pivot_value *pivot_value_new_integer (double);
706 /* Values from data. */
707 struct pivot_value *pivot_value_new_var_value (
708 const struct variable *, const union value *);
709 struct pivot_value *pivot_value_new_value (const union value *, int width,
710 const struct fmt_spec *,
711 const char *encoding);
713 /* Values from variable names. */
714 struct pivot_value *pivot_value_new_variable (const struct variable *);
716 /* Values from text strings. */
717 struct pivot_value *pivot_value_new_text (const char *);
718 struct pivot_value *pivot_value_new_text_format (const char *, ...)
719 #if defined(__GNUC__) && ((__GNUC__ == 4 && __GNUC_MINOR__>= 4) || __GNUC__ > 4)
720 __attribute__((format(gnu_printf, 1, 2)));
722 __attribute__((format(__printf__, 1, 2)));
725 struct pivot_value *pivot_value_new_user_text (const char *, size_t length);
726 struct pivot_value *pivot_value_new_user_text_nocopy (char *);
729 void pivot_value_add_footnote (struct pivot_value *, const struct pivot_footnote *);
731 /* Numeric formats. */
732 void pivot_value_set_rc (const struct pivot_table *, struct pivot_value *,
735 /* Converting a pivot_value to a string for display. */
736 char *pivot_value_to_string (const struct pivot_value *,
737 enum settings_value_show show_values,
738 enum settings_value_show show_variables);
739 void pivot_value_format (const struct pivot_value *,
740 enum settings_value_show show_values,
741 enum settings_value_show show_variables,
743 bool pivot_value_format_body (const struct pivot_value *,
744 enum settings_value_show show_values,
745 enum settings_value_show show_variables,
748 void pivot_value_destroy (struct pivot_value *);
751 void pivot_value_get_style (struct pivot_value *,
752 const struct font_style *base_font_style,
753 const struct cell_style *base_cell_style,
754 struct table_area_style *);
755 void pivot_value_set_style (struct pivot_value *,
756 const struct table_area_style *);
758 /* Template arguments. */
759 struct pivot_argument
762 struct pivot_value **values;
765 void pivot_argument_uninit (struct pivot_argument *);
767 /* One piece of data within a pivot table. */
770 struct hmap_node hmap_node; /* In struct pivot_table's 'cells' hmap. */
771 struct pivot_value *value;
772 unsigned int idx[]; /* One index per table dimension. */
775 #endif /* output/pivot-table.h */