1 /* PSPP - computes sample statistics.
2 Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 This program is distributed in the hope that it will be useful, but
10 WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 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, write to the Free Software
16 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
29 #include <libpspp/message.h>
30 #include <libpspp/version.h>
31 #include <gl/xalloc.h>
32 #include <data/dictionary.h>
33 #include <data/case.h>
34 #include <data/casereader.h>
35 #include <data/variable.h>
36 #include <data/attributes.h>
37 #include <data/file-handle-def.h>
38 #include <data/sys-file-writer.h>
39 #include <data/sys-file-reader.h>
40 #include <data/value.h>
41 #include <data/value-labels.h>
42 #include <data/format.h>
43 #include <data/data-in.h>
46 typedef struct fmt_spec input_format ;
47 typedef struct fmt_spec output_format ;
50 /* A thin wrapper around sfm_writer */
55 /* A pointer to the writer. The writer is owned by the struct */
56 struct casewriter *writer;
58 /* A pointer to the dictionary. Owned externally */
59 const struct dictionary *dict;
61 /* The scalar containing the dictionary */
66 /* A thin wrapper around sfm_reader */
69 struct sfm_read_info opts;
71 /* A pointer to the reader. The reader is owned by the struct */
72 struct casereader *reader;
74 /* A pointer to the dictionary. */
75 struct dictionary *dict;
80 /* A message handler which writes messages to PSPP::errstr */
82 message_handler (const struct msg *m)
84 SV *errstr = get_sv("PSPP::errstr", TRUE);
85 sv_setpv (errstr, m->text);
89 sysfile_close (struct sysfile_info *sfi)
95 retval = casewriter_destroy (sfi->writer);
103 scalar_to_value (union value *val, SV *scalar, const struct variable *var)
105 if ( var_is_numeric (var))
107 if ( SvNOK (scalar) || SvIOK (scalar) )
108 val->f = SvNV (scalar);
115 const char *p = SvPV (scalar, len);
116 int width = var_get_width (var);
117 value_set_missing (val, width);
118 memcpy (value_str_rw (val, width), p, len);
124 value_to_scalar (const union value *val, const struct variable *var)
126 if ( var_is_numeric (var))
128 if ( var_is_value_missing (var, val, MV_SYSTEM))
129 return newSVpvn ("", 0);
131 return newSVnv (val->f);
135 int width = var_get_width (var);
136 return newSVpvn (value_str (val, width), width);
142 var_set_input_format (struct variable *v, input_format ip_fmt)
144 struct fmt_spec *if_copy = malloc (sizeof (*if_copy));
145 memcpy (if_copy, &ip_fmt, sizeof (ip_fmt));
146 var_attach_aux (v, if_copy, var_dtor_free);
150 make_value_from_scalar (union value *uv, SV *val, const struct variable *var)
152 value_init (uv, var_get_width (var));
153 scalar_to_value (uv, val, var);
159 MODULE = PSPP PACKAGE = PSPP
165 assert (0 == strcmp (ver, bare_version));
166 msg_init (NULL, message_handler);
167 settings_init (0, 0);
171 format_value (val, var)
176 const struct fmt_spec *fmt = var_get_print_format (var);
179 make_value_from_scalar (&uv, val, var);
180 s = data_out (&uv, fmt);
181 value_destroy (&uv, var_get_width (var));
182 ret = newSVpv (s, fmt->w);
190 value_is_missing (val, var)
196 make_value_from_scalar (&uv, val, var);
197 ret = var_is_value_missing (var, &uv, MV_ANY);
198 value_destroy (&uv, var_get_width (var));
205 MODULE = PSPP PACKAGE = PSPP::Dict
210 RETVAL = dict_create ();
217 struct dictionary *dict
224 struct dictionary *dict
226 RETVAL = dict_get_var_cnt (dict);
231 set_label (dict, label)
232 struct dictionary *dict
235 dict_set_label (dict, label);
238 set_documents (dict, docs)
239 struct dictionary *dict
242 dict_set_documents (dict, docs);
246 add_document (dict, doc)
247 struct dictionary *dict
250 dict_add_document_line (dict, doc);
254 clear_documents (dict)
255 struct dictionary *dict
257 dict_clear_documents (dict);
261 set_weight (dict, var)
262 struct dictionary *dict
265 dict_set_weight (dict, var);
269 pxs_get_variable (dict, idx)
270 struct dictionary *dict
273 SV *errstr = get_sv("PSPP::errstr", TRUE);
274 sv_setpv (errstr, "");
275 if ( SvIV (idx) >= dict_get_var_cnt (dict))
277 sv_setpv (errstr, "The dictionary doesn't have that many variables.");
281 RETVAL = dict_get_var (dict, SvIV (idx));
287 pxs_get_var_by_name (dict, name)
288 struct dictionary *dict
291 SV *errstr = get_sv("PSPP::errstr", TRUE);
292 sv_setpv (errstr, "");
294 struct variable *var = dict_lookup_var (dict, name);
296 sv_setpv (errstr, "No such variable.");
302 MODULE = PSPP PACKAGE = PSPP::Var
306 pxs_dict_create_var (dict, name, ip_fmt)
307 struct dictionary * dict
311 SV *errstr = get_sv("PSPP::errstr", TRUE);
312 sv_setpv (errstr, "");
313 if ( ! var_is_plausible_name (name, false))
315 sv_setpv (errstr, "The variable name is not valid.");
319 struct fmt_spec op_fmt;
322 op_fmt = fmt_for_output_from_input (&ip_fmt);
323 v = dict_create_var (dict, name,
324 fmt_is_string (op_fmt.type) ? op_fmt.w : 0);
327 sv_setpv (errstr, "The variable could not be created (probably already exists).");
330 var_set_both_formats (v, &op_fmt);
331 var_set_input_format (v, ip_fmt);
338 set_missing_values (var, v1, ...)
339 struct variable *var;
346 croak ("No more than 3 missing values are permitted");
348 for (i = 0; i < items - 1; ++i)
349 scalar_to_value (&val[i], ST(i+1), var);
351 struct missing_values mv;
352 mv_init (&mv, var_get_width (var));
353 for (i = 0 ; i < items - 1; ++i )
354 mv_add_value (&mv, &val[i]);
355 var_set_missing_values (var, &mv);
359 set_label (var, label)
360 struct variable *var;
363 var_set_label (var, label);
367 clear_value_labels (var)
368 struct variable *var;
370 var_clear_value_labels (var);
373 pxs_set_write_format (var, fmt)
377 var_set_write_format (var, &fmt);
381 pxs_set_print_format (var, fmt)
385 var_set_print_format (var, &fmt);
388 pxs_set_output_format (var, fmt)
392 var_set_both_formats (var, &fmt);
396 add_value_label (var, key, label)
401 SV *errstr = get_sv("PSPP::errstr", TRUE);
402 sv_setpv (errstr, "");
404 union value the_value;
405 int width = var_get_width (var);
408 value_init (&the_value, width);
409 if ( var_is_numeric (var))
411 if ( ! looks_like_number (key))
413 sv_setpv (errstr, "Cannot add label with string key to a numeric variable");
414 value_destroy (&the_value, width);
417 the_value.f = SvNV (key);
421 value_copy_str_rpad (&the_value, width, SvPV_nolen(key), ' ');
423 ok = var_add_value_label (var, &the_value, label);
424 value_destroy (&the_value, width);
427 sv_setpv (errstr, "Something went wrong");
437 HV *attrhash = (HV *) sv_2mortal ((SV *) newHV());
439 struct attrset *as = var_get_attributes (var);
443 struct attrset_iterator iter;
444 struct attribute *attr;
446 for (attr = attrset_first (as, &iter);
448 attr = attrset_next (as, &iter))
451 const char *name = attribute_get_name (attr);
453 AV *values = newAV ();
455 for (i = 0 ; i < attribute_get_n_values (attr); ++i )
457 const char *value = attribute_get_value (attr, i);
458 av_push (values, newSVpv (value, 0));
461 hv_store (attrhash, name, strlen (name),
462 newRV_noinc ((SV*) values), 0);
466 RETVAL = newRV ((SV *) attrhash);
473 struct variable * var
475 RETVAL = var_get_name (var);
482 struct variable * var
484 RETVAL = var_get_label (var);
490 get_value_labels (var)
493 HV *labelhash = (HV *) sv_2mortal ((SV *) newHV());
494 const struct val_lab *vl;
495 struct val_labs_iterator *viter = NULL;
496 const struct val_labs *labels = var_get_value_labels (var);
500 for (vl = val_labs_first (labels);
502 vl = val_labs_next (labels, vl))
504 SV *sv = value_to_scalar (&vl->value, var);
506 const char *s = SvPV (sv, len);
507 hv_store (labelhash, s, len, newSVpv (val_lab_get_label (vl), 0), 0);
511 RETVAL = newRV ((SV *) labelhash);
517 MODULE = PSPP PACKAGE = PSPP::Sysfile
520 struct sysfile_info *
521 pxs_create_sysfile (name, dict_ref, opts_hr)
526 SV *dict_sv = SvRV (dict_ref);
527 struct dictionary *dict = (void *) SvIV (dict_sv);
528 struct sfm_write_options opts;
529 if (!SvROK (opts_hr))
531 opts = sfm_writer_default_options ();
535 HV *opt_h = (HV *) SvRV (opts_hr);
536 SV** readonly = hv_fetch(opt_h, "readonly", 8, 0);
537 SV** compress = hv_fetch(opt_h, "compress", 8, 0);
538 SV** version = hv_fetch(opt_h, "version", 7, 0);
540 opts.create_writeable = readonly ? ! SvIV (*readonly) : true;
541 opts.compress = compress ? SvIV (*compress) : false;
542 opts.version = version ? SvIV (*version) : 3 ;
545 struct file_handle *fh =
546 fh_create_file (NULL, name, fh_default_properties () );
547 struct sysfile_info *sfi = xmalloc (sizeof (*sfi));
548 sfi->writer = sfm_open_writer (fh, dict, opts);
551 sfi->dict_sv = dict_sv;
552 SvREFCNT_inc (sfi->dict_sv);
560 struct sysfile_info *sfi
562 RETVAL = sysfile_close (sfi);
568 struct sysfile_info *sfi
571 SvREFCNT_dec (sfi->dict_sv);
575 append_case (sfi, ccase)
576 struct sysfile_info *sfi
579 SV *errstr = get_sv("PSPP::errstr", TRUE);
580 sv_setpv (errstr, "");
581 if ( (!SvROK(ccase)))
587 AV *av_case = (AV*) SvRV (ccase);
589 const struct variable **vv;
594 if ( av_len (av_case) >= dict_get_var_cnt (sfi->dict))
597 c = case_create (dict_get_proto (sfi->dict));
599 dict_get_vars (sfi->dict, &vv, &nv, 1u << DC_ORDINARY | 1u << DC_SYSTEM);
601 for (sv = av_shift (av_case); SvOK (sv); sv = av_shift (av_case))
603 const struct variable *v = vv[i++];
604 const struct fmt_spec *ifmt = var_get_aux (v);
606 /* If an input format has been set, then use it.
607 Otherwise just convert the raw value.
611 struct substring ss = ss_cstr (SvPV_nolen (sv));
612 if ( ! data_in (ss, LEGACY_NATIVE, ifmt->type, 0, 0, 0,
622 scalar_to_value (case_data_rw (c, v), sv, v);
626 /* The remaining variables must be sysmis or blank string */
627 while (i < dict_get_var_cnt (sfi->dict))
629 const struct variable *v = vv[i++];
630 union value *val = case_data_rw (c, v);
631 value_set_missing (val, var_get_width (v));
633 RETVAL = casewriter_write (sfi->writer, c);
642 MODULE = PSPP PACKAGE = PSPP::Reader
644 struct sysreader_info *
645 pxs_open_sysfile (name)
648 struct casereader *reader;
649 struct sysreader_info *sri = NULL;
650 struct file_handle *fh =
651 fh_create_file (NULL, name, fh_default_properties () );
653 sri = xmalloc (sizeof (*sri));
654 sri->reader = sfm_open_reader (fh, &sri->dict, &sri->opts);
656 if ( NULL == sri->reader)
668 pxs_get_dict (reader)
669 struct sysreader_info *reader;
671 RETVAL = reader->dict;
678 struct sysreader_info *sfr;
682 if (c = casereader_read (sfr->reader))
686 EXTEND (SP, dict_get_var_cnt (sfr->dict));
687 for (v = 0; v < dict_get_var_cnt (sfr->dict); ++v )
689 const struct variable *var = dict_get_var (sfr->dict, v);
690 const union value *val = case_data (c, var);
692 PUSHs (sv_2mortal (value_to_scalar (val, var)));