1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2007, 2009, 2010, 2011, 2012 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/>. */
19 #include "libpspp/message.h"
20 #include "libpspp/misc.h"
22 #include "gl/minmax.h"
23 #include "gl/c-strtod.h"
26 #define _(msgid) gettext (msgid)
27 #define N_(msgid) (msgid)
29 #include "spreadsheet-reader.h"
31 #include "c-xvasprintf.h"
36 gnumeric_open_reader (struct spreadsheet_read_info *gri, struct spreadsheet_read_options *opts, struct dictionary **dict)
38 msg (ME, _("Support for %s files was not compiled into this installation of PSPP"), "Gnumeric");
45 #include "data/gnumeric-reader.h"
50 #include <libxml/xmlreader.h>
53 #include "data/case.h"
54 #include "data/casereader-provider.h"
55 #include "data/dictionary.h"
56 #include "data/identifier.h"
57 #include "data/value.h"
58 #include "data/variable.h"
59 #include "libpspp/i18n.h"
60 #include "libpspp/str.h"
62 #include "gl/xalloc.h"
64 static void gnm_file_casereader_destroy (struct casereader *, void *);
66 static struct ccase *gnm_file_casereader_read (struct casereader *, void *);
68 static const struct casereader_class gnm_file_casereader_class =
70 gnm_file_casereader_read,
71 gnm_file_casereader_destroy,
78 STATE_PRE_INIT = 0, /* Initial state */
79 STATE_SHEET_COUNT, /* Found the sheet index */
80 STATE_INIT , /* Other Initial state */
81 STATE_SHEET_START, /* Found the start of a sheet */
82 STATE_SHEET_NAME, /* Found the sheet name */
84 STATE_SHEET_FOUND, /* Found the sheet that we actually want */
85 STATE_CELLS_START, /* Found the start of the cell array */
86 STATE_CELL /* Found a cell */
90 struct gnumeric_reader
92 struct spreadsheet spreadsheet;
96 enum reader_state state;
98 /* The total number of sheets in the "workbook" */
108 const xmlChar *target_sheet;
109 int target_sheet_index;
116 struct caseproto *proto;
117 struct dictionary *dict;
118 struct ccase *first_case;
119 bool used_first_case;
122 static void process_node (struct gnumeric_reader *r);
126 gnm_file_casereader_destroy (struct casereader *reader UNUSED, void *r_)
128 struct gnumeric_reader *r = r_;
133 xmlFreeTextReader (r->xtr);
135 if ( ! r->used_first_case )
136 case_unref (r->first_case);
138 caseproto_unref (r->proto);
144 process_node (struct gnumeric_reader *r)
146 xmlChar *name = xmlTextReaderName (r->xtr);
148 name = xmlStrdup (_xml ("--"));
151 r->node_type = xmlTextReaderNodeType (r->xtr);
156 if (0 == xmlStrcasecmp (name, _xml("gnm:SheetNameIndex")) &&
157 XML_READER_TYPE_ELEMENT == r->node_type)
159 r->state = STATE_SHEET_COUNT;
164 case STATE_SHEET_COUNT:
165 if (0 == xmlStrcasecmp (name, _xml("gnm:SheetName")) &&
166 XML_READER_TYPE_ELEMENT == r->node_type)
170 else if (0 == xmlStrcasecmp (name, _xml("gnm:SheetNameIndex")) &&
171 XML_READER_TYPE_END_ELEMENT == r->node_type)
173 r->state = STATE_INIT;
178 if (0 == xmlStrcasecmp (name, _xml("gnm:Sheet")) &&
179 XML_READER_TYPE_ELEMENT == r->node_type)
182 r->state = STATE_SHEET_START;
185 case STATE_SHEET_START:
186 if (0 == xmlStrcasecmp (name, _xml("gnm:Name")) &&
187 XML_READER_TYPE_ELEMENT == r->node_type)
189 r->state = STATE_SHEET_NAME;
192 case STATE_SHEET_NAME:
193 if (0 == xmlStrcasecmp (name, _xml("gnm:Name")) &&
194 XML_READER_TYPE_END_ELEMENT == r->node_type)
196 r->state = STATE_INIT;
198 else if (XML_READER_TYPE_TEXT == r->node_type)
200 if ( r->target_sheet != NULL)
202 xmlChar *value = xmlTextReaderValue (r->xtr);
203 if ( 0 == xmlStrcmp (value, r->target_sheet))
204 r->state = STATE_SHEET_FOUND;
207 else if (r->target_sheet_index == r->sheet_index)
209 r->state = STATE_SHEET_FOUND;
213 case STATE_SHEET_FOUND:
214 if (0 == xmlStrcasecmp (name, _xml("gnm:Cells")) &&
215 XML_READER_TYPE_ELEMENT == r->node_type)
217 r->min_col = INT_MAX;
218 if (! xmlTextReaderIsEmptyElement (r->xtr))
219 r->state = STATE_CELLS_START;
221 else if (0 == xmlStrcasecmp (name, _xml("gnm:MaxRow")) &&
222 XML_READER_TYPE_ELEMENT == r->node_type)
224 r->state = STATE_MAXROW;
226 else if (0 == xmlStrcasecmp (name, _xml("gnm:Sheet")) &&
227 XML_READER_TYPE_END_ELEMENT == r->node_type)
229 r->state = STATE_INIT;
233 if (0 == xmlStrcasecmp (name, _xml("gnm:MaxRow")) &&
234 XML_READER_TYPE_END_ELEMENT == r->node_type)
236 r->state = STATE_SHEET_FOUND;
238 case STATE_CELLS_START:
239 if (0 == xmlStrcasecmp (name, _xml ("gnm:Cell")) &&
240 XML_READER_TYPE_ELEMENT == r->node_type)
242 xmlChar *attr = NULL;
243 r->state = STATE_CELL;
245 attr = xmlTextReaderGetAttribute (r->xtr, _xml ("Col"));
246 r->col = _xmlchar_to_int (attr);
249 if (r->col < r->min_col)
252 attr = xmlTextReaderGetAttribute (r->xtr, _xml ("Row"));
253 r->row = _xmlchar_to_int (attr);
256 else if (0 == xmlStrcasecmp (name, _xml("gnm:Cells")) &&
257 XML_READER_TYPE_END_ELEMENT == r->node_type)
258 r->state = STATE_SHEET_NAME;
262 if (0 == xmlStrcasecmp (name, _xml("gnm:Cell")) &&
263 XML_READER_TYPE_END_ELEMENT == r->node_type)
265 r->state = STATE_CELLS_START;
277 Sets the VAR of case C, to the value corresponding to the xml string XV
280 convert_xml_string_to_value (struct ccase *c, const struct variable *var,
283 union value *v = case_data_rw (c, var);
286 value_set_missing (v, var_get_width (var));
287 else if ( var_is_alpha (var))
288 value_copy_str_rpad (v, var_get_width (var), xv, ' ');
291 const char *text = CHAR_CAST (const char *, xv);
295 v->f = c_strtod (text, &endptr);
296 if ( errno != 0 || endptr == text)
305 xmlChar *first_value;
309 gnumeric_probe (const char *filename)
312 struct gnumeric_reader *r = NULL;
313 xmlTextReaderPtr xtr;
315 gzFile gz = gzopen (filename, "r");
320 xtr = xmlReaderForIO ((xmlInputReadCallback) gzread,
321 (xmlInputCloseCallback) gzclose, gz,
327 r = xzalloc (sizeof *r);
331 r->state = STATE_PRE_INIT;
334 /* Advance to the start of the workbook.
335 This gives us some confidence that we are actually dealing with a gnumeric
338 while ( (r->state != STATE_INIT )
339 && 1 == (ret = xmlTextReaderRead (r->xtr)))
346 /* Not a gnumeric spreadsheet */
352 r->spreadsheet.type = SPREADSHEET_GNUMERIC;
353 r->spreadsheet.sheets = r->sheet_total;
354 r->spreadsheet.make_reader = NULL;
357 return &r->spreadsheet;
361 gnumeric_open_reader (const struct spreadsheet_read_info *gri,
362 struct spreadsheet_read_options *opts,
363 struct dictionary **dict)
365 unsigned long int vstart = 0;
367 casenumber n_cases = CASENUMBER_MAX;
369 struct var_spec *var_spec = NULL;
372 struct spreadsheet * spreadsheet = NULL;
373 struct gnumeric_reader *r = NULL;
375 spreadsheet = gnumeric_probe (gri->file_name);
377 if (spreadsheet == NULL)
380 r = (struct gnumeric_reader *) (spreadsheet);
382 if ( opts->cell_range )
384 if ( ! convert_cell_ref (opts->cell_range,
385 &r->start_col, &r->start_row,
386 &r->stop_col, &r->stop_row))
388 msg (SE, _("Invalid cell range `%s'"),
402 r->target_sheet = BAD_CAST opts->sheet_name;
403 r->target_sheet_index = opts->sheet_index;
404 r->row = r->col = -1;
407 /* Advance to the start of the cells for the target sheet */
408 while ( (r->state != STATE_CELL || r->row < r->start_row )
409 && 1 == (ret = xmlTextReaderRead (r->xtr)))
413 value = xmlTextReaderValue (r->xtr);
415 if ( r->state == STATE_MAXROW && r->node_type == XML_READER_TYPE_TEXT)
417 n_cases = 1 + _xmlchar_to_int (value) ;
423 /* If a range has been given, then use that to calculate the number
425 if ( opts->cell_range)
427 n_cases = MIN (n_cases, r->stop_row - r->start_row + 1);
430 if ( gri->read_names )
436 /* Read in the first row of cells,
437 including the headers if read_names was set */
439 (( r->state == STATE_CELLS_START && r->row <= r->start_row) || r->state == STATE_CELL )
440 && (ret = xmlTextReaderRead (r->xtr))
446 if ( r->row > r->start_row ) break;
448 if ( r->col < r->start_col ||
449 (r->stop_col != -1 && r->col > r->stop_col))
452 idx = r->col - r->start_col;
454 if ( idx >= n_var_specs )
457 var_spec = xrealloc (var_spec, sizeof (*var_spec) * (idx + 1));
458 for (i = n_var_specs; i <= idx; ++i)
460 var_spec [i].name = NULL;
461 var_spec [i].width = -1;
462 var_spec [i].first_value = NULL;
464 n_var_specs = idx + 1 ;
467 if ( r->node_type == XML_READER_TYPE_TEXT )
469 xmlChar *value = xmlTextReaderValue (r->xtr);
470 const char *text = CHAR_CAST (const char *, value);
472 if ( r->row < r->start_row)
474 if ( gri->read_names )
476 var_spec [idx].name = xstrdup (text);
481 var_spec [idx].first_value = xmlStrdup (value);
483 if (-1 == var_spec [idx].width )
484 var_spec [idx].width = (gri->asw == -1) ?
485 ROUND_UP (strlen(text), SPREADSHEET_DEFAULT_WIDTH) : gri->asw;
490 else if ( r->node_type == XML_READER_TYPE_ELEMENT
491 && r->state == STATE_CELL)
493 if ( r->row == r->start_row )
496 xmlTextReaderGetAttribute (r->xtr, _xml ("ValueType"));
498 if ( NULL == attr || 60 != _xmlchar_to_int (attr))
499 var_spec [idx].width = 0;
507 const xmlChar *enc = xmlTextReaderConstEncoding (r->xtr);
510 /* Create the dictionary and populate it */
511 *dict = r->dict = dict_create (CHAR_CAST (const char *, enc));
514 for (i = 0 ; i < n_var_specs ; ++i )
518 if ( (var_spec[i].name == NULL) && (var_spec[i].first_value == NULL))
521 /* Probably no data exists for this variable, so allocate a
523 if ( var_spec[i].width == -1 )
524 var_spec[i].width = SPREADSHEET_DEFAULT_WIDTH;
526 name = dict_make_unique_var_name (r->dict, var_spec[i].name, &vstart);
527 dict_create_var (r->dict, name, var_spec[i].width);
531 /* Create the first case, and cache it */
532 r->used_first_case = false;
534 if ( n_var_specs == 0 )
536 msg (MW, _("Selected sheet or range of spreadsheet `%s' is empty."),
541 r->proto = caseproto_ref (dict_get_proto (r->dict));
542 r->first_case = case_create (r->proto);
543 case_set_missing (r->first_case);
546 for ( i = 0 ; i < n_var_specs ; ++i )
548 if ( (var_spec[i].name == NULL) && (var_spec[i].first_value == NULL))
551 const struct variable *var = dict_get_var (r->dict, x++);
553 convert_xml_string_to_value (r->first_case, var,
554 var_spec[i].first_value);
557 for ( i = 0 ; i < n_var_specs ; ++i )
559 free (var_spec[i].first_value);
560 free (var_spec[i].name);
566 if (opts->cell_range == NULL)
568 opts->cell_range = c_xasprintf ("%c%d:%c%d",
571 r->stop_col + 'A' + caseproto_get_n_widths (r->proto),
572 r->start_row + n_cases);
575 return casereader_create_sequential
579 &gnm_file_casereader_class, r);
583 for ( i = 0 ; i < n_var_specs ; ++i )
585 free (var_spec[i].first_value);
586 free (var_spec[i].name);
590 dict_destroy (*dict);
593 gnm_file_casereader_destroy (NULL, r);
599 /* Reads and returns one case from READER's file. Returns a null
600 pointer on failure. */
601 static struct ccase *
602 gnm_file_casereader_read (struct casereader *reader UNUSED, void *r_)
607 struct gnumeric_reader *r = r_;
608 int current_row = r->row;
610 if ( !r->used_first_case )
612 r->used_first_case = true;
613 return r->first_case;
616 c = case_create (r->proto);
617 case_set_missing (c);
619 if (r->start_col == -1)
620 r->start_col = r->min_col;
622 while ((r->state == STATE_CELL || r->state == STATE_CELLS_START )
623 && r->row == current_row && (ret = xmlTextReaderRead (r->xtr)))
627 if ( r->col < r->start_col || (r->stop_col != -1 &&
628 r->col > r->stop_col))
631 if ( r->col - r->start_col >= caseproto_get_n_widths (r->proto))
634 if ( r->stop_row != -1 && r->row > r->stop_row)
637 if ( r->node_type == XML_READER_TYPE_TEXT )
639 xmlChar *value = xmlTextReaderValue (r->xtr);
641 const int idx = r->col - r->start_col;
643 const struct variable *var = dict_get_var (r->dict, idx);
645 convert_xml_string_to_value (c, var, value);
662 #endif /* GNM_SUPPORT */