1 /* PSPP - computes sample statistics.
2 Copyright (C) 1997-9, 2000 Free Software Foundation, Inc.
3 Written by Ben Pfaff <blp@gnu.org>.
5 This program is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 This program is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
27 #include "algorithm.h"
31 #include "dictionary.h"
41 #ifndef HAVE_SYS_TYPES_H
42 #include <sys/types.h>
45 /* List of variable names. */
49 char name[SHORT_NAME_LEN + 1];
52 /* Represents a FLIP input program. */
55 struct variable **var; /* Variables to transpose. */
56 int *idx_to_fv; /* var[]->index to compacted sink case fv. */
57 int var_cnt; /* Number of elements in `var'. */
58 int case_cnt; /* Pre-flip case count. */
59 size_t case_size; /* Post-flip bytes per case. */
61 struct variable *new_names; /* Variable containing new variable names. */
62 struct varname *new_names_head; /* First new variable. */
63 struct varname *new_names_tail; /* Last new variable. */
65 FILE *file; /* Temporary file containing data. */
68 static void destroy_flip_pgm (struct flip_pgm *);
69 static struct case_sink *flip_sink_create (struct flip_pgm *);
70 static struct case_source *flip_source_create (struct flip_pgm *);
71 static void flip_file (struct flip_pgm *);
72 static int build_dictionary (struct flip_pgm *);
74 static const struct case_source_class flip_source_class;
75 static const struct case_sink_class flip_sink_class;
77 /* Parses and executes FLIP. */
81 struct flip_pgm *flip;
85 msg (SM, _("FLIP ignores TEMPORARY. "
86 "Temporary transformations will be made permanent."));
90 flip = xmalloc (sizeof *flip);
92 flip->idx_to_fv = dict_get_compacted_idx_to_fv (default_dict);
95 flip->new_names = NULL;
96 flip->new_names_head = NULL;
97 flip->new_names_tail = NULL;
101 if (lex_match_id ("VARIABLES"))
104 if (!parse_variables (default_dict, &flip->var, &flip->var_cnt, PV_NO_DUPLICATE))
109 dict_get_vars (default_dict, &flip->var, &flip->var_cnt, 1u << DC_SYSTEM);
112 if (lex_match_id ("NEWNAMES"))
115 flip->new_names = parse_variable ();
116 if (!flip->new_names)
120 flip->new_names = dict_lookup_var (default_dict, "CASE_LBL");
126 for (i = 0; i < flip->var_cnt; i++)
127 if (flip->var[i] == flip->new_names)
129 remove_element (flip->var, flip->var_cnt, sizeof *flip->var, i);
135 /* Read the active file into a flip_sink. */
137 temp_trns = temporary = 0;
138 vfm_sink = flip_sink_create (flip);
139 flip->new_names_tail = NULL;
140 procedure (NULL, NULL);
142 /* Flip the data we read. */
145 /* Flip the dictionary. */
146 dict_clear (default_dict);
147 if (!build_dictionary (flip))
149 discard_variables ();
152 flip->case_size = dict_get_case_size (default_dict);
154 /* Set up flipped data for reading. */
155 vfm_source = flip_source_create (flip);
157 return lex_end_of_command ();
160 destroy_flip_pgm (flip);
166 destroy_flip_pgm (struct flip_pgm *flip)
168 struct varname *iter, *next;
171 free (flip->idx_to_fv);
172 for (iter = flip->new_names_head; iter != NULL; iter = next)
177 if (flip->file != NULL)
182 /* Make a new variable with base name NAME, which is bowdlerized and
183 mangled until acceptable, and returns success. */
185 make_new_var (char name[])
189 /* Trim trailing spaces. */
190 cp = strchr (name, '\0');
191 while (cp > name && isspace ((unsigned char) cp[-1]))
194 /* Fix invalid characters. */
195 for (cp = name; *cp && cp < name + SHORT_NAME_LEN; cp++)
198 if (!CHAR_IS_ID1 (*cp) || *cp == '$')
203 if (!CHAR_IS_IDN (*cp))
209 if (dict_create_var (default_dict, name, 0))
212 /* Add numeric extensions until acceptable. */
214 const int len = (int) strlen (name);
215 char n[SHORT_NAME_LEN + 1];
218 for (i = 1; i < 10000000; i++)
220 int ofs = min (7 - intlog10 (i), len);
221 memcpy (n, name, ofs);
222 sprintf (&n[ofs], "%d", i);
224 if (dict_create_var (default_dict, n, 0))
229 msg (SE, _("Could not create acceptable variant for variable %s."), name);
233 /* Make a new dictionary for all the new variable names. */
235 build_dictionary (struct flip_pgm *flip)
237 dict_create_var_assert (default_dict, "CASE_LBL", 8);
239 if (flip->new_names_head == NULL)
243 if (flip->case_cnt > 99999)
245 msg (SE, _("Cannot create more than 99999 variable names."));
249 for (i = 0; i < flip->case_cnt; i++)
252 char s[SHORT_NAME_LEN + 1];
254 sprintf (s, "VAR%03d", i);
255 v = dict_create_var_assert (default_dict, s, 0);
262 for (v = flip->new_names_head; v; v = v->next)
263 if (!make_new_var (v->name))
270 /* Cases during transposition. */
271 struct flip_sink_info
273 struct flip_pgm *flip; /* FLIP program. */
274 union value *output_buf; /* Case output buffer. */
277 /* Creates a flip sink based on FLIP. */
278 static struct case_sink *
279 flip_sink_create (struct flip_pgm *flip)
281 struct flip_sink_info *info = xmalloc (sizeof *info);
285 info->output_buf = xmalloc (sizeof *info->output_buf * flip->var_cnt);
287 flip->file = tmpfile ();
289 msg (FE, _("Could not create temporary file for FLIP."));
291 /* Write variable names as first case. */
292 for (i = 0; i < flip->var_cnt; i++)
293 st_bare_pad_copy (info->output_buf[i].s, flip->var[i]->name, MAX_SHORT_STRING);
294 if (fwrite (info->output_buf, sizeof *info->output_buf,
295 flip->var_cnt, flip->file) != (size_t) flip->var_cnt)
296 msg (FE, _("Error writing FLIP file: %s."), strerror (errno));
300 return create_case_sink (&flip_sink_class, default_dict, info);
303 /* Writes case C to the FLIP sink. */
305 flip_sink_write (struct case_sink *sink, const struct ccase *c)
307 struct flip_sink_info *info = sink->aux;
308 struct flip_pgm *flip = info->flip;
313 if (flip->new_names != NULL)
315 struct varname *v = xmalloc (sizeof (struct varname));
317 if (flip->new_names->type == NUMERIC)
319 double f = case_num (c, flip->idx_to_fv[flip->new_names->index]);
322 strcpy (v->name, "VSYSMIS");
323 else if (f < INT_MIN)
324 strcpy (v->name, "VNEGINF");
325 else if (f > INT_MAX)
326 strcpy (v->name, "VPOSINF");
329 char name[INT_DIGITS + 2];
330 sprintf (name, "V%d", (int) f);
331 st_trim_copy (v->name, name, sizeof v->name);
336 int width = min (flip->new_names->width, MAX_SHORT_STRING);
337 memcpy (v->name, case_str (c, flip->idx_to_fv[flip->new_names->index]),
342 if (flip->new_names_head == NULL)
343 flip->new_names_head = v;
345 flip->new_names_tail->next = v;
346 flip->new_names_tail = v;
349 /* Write to external file. */
350 for (i = 0; i < flip->var_cnt; i++)
354 if (flip->var[i]->type == NUMERIC)
355 out = case_num (c, flip->idx_to_fv[flip->var[i]->index]);
358 info->output_buf[i].f = out;
361 if (fwrite (info->output_buf, sizeof *info->output_buf,
362 flip->var_cnt, flip->file) != (size_t) flip->var_cnt)
363 msg (FE, _("Error writing FLIP file: %s."), strerror (errno));
366 /* Transposes the external file into a new file. */
368 flip_file (struct flip_pgm *flip)
371 size_t case_capacity;
373 union value *input_buf, *output_buf;
374 FILE *input_file, *output_file;
376 /* Allocate memory for many cases. */
377 case_bytes = flip->var_cnt * sizeof *input_buf;
378 case_capacity = get_max_workspace() / case_bytes;
379 if (case_capacity > flip->case_cnt * 2)
380 case_capacity = flip->case_cnt * 2;
381 if (case_capacity < 2)
385 size_t bytes = case_bytes * case_capacity;
386 if (case_capacity > 2)
387 input_buf = malloc (bytes);
389 input_buf = xmalloc (bytes);
390 if (input_buf != NULL)
394 if (case_capacity < 2)
398 /* Use half the allocated memory for input_buf, half for
401 output_buf = input_buf + flip->var_cnt * case_capacity;
403 input_file = flip->file;
404 if (fseek (input_file, 0, SEEK_SET) != 0)
405 msg (FE, _("Error rewinding FLIP file: %s."), strerror (errno));
407 output_file = tmpfile ();
408 if (output_file == NULL)
409 msg (FE, _("Error creating FLIP source file."));
411 for (case_idx = 0; case_idx < flip->case_cnt; )
413 unsigned long read_cases = min (flip->case_cnt - case_idx,
417 if (read_cases != fread (input_buf, case_bytes, read_cases, input_file))
418 msg (FE, _("Error reading FLIP file: %s."), strerror (errno));
420 for (i = 0; i < flip->var_cnt; i++)
424 for (j = 0; j < read_cases; j++)
425 output_buf[j] = input_buf[i + j * flip->var_cnt];
432 #define off_t long int
435 if (fseeko (output_file,
436 sizeof *input_buf * (case_idx
437 + (off_t) i * flip->case_cnt),
439 msg (FE, _("Error seeking FLIP source file: %s."),
442 if (fwrite (output_buf, sizeof *output_buf, read_cases, output_file)
444 msg (FE, _("Error writing FLIP source file: %s."),
448 case_idx += read_cases;
454 if (fseek (output_file, 0, SEEK_SET) != 0)
455 msg (FE, _("Error rewind FLIP source file: %s."), strerror (errno));
456 flip->file = output_file;
459 /* Destroy sink's internal data. */
461 flip_sink_destroy (struct case_sink *sink)
463 struct flip_sink_info *info = sink->aux;
465 free (info->output_buf);
469 /* FLIP sink class. */
470 static const struct case_sink_class flip_sink_class =
479 /* Creates and returns a FLIP source based on PGM,
480 which should have already been used as a sink. */
481 static struct case_source *
482 flip_source_create (struct flip_pgm *pgm)
484 return create_case_source (&flip_source_class, pgm);
487 /* Reads the FLIP stream. Copies each case into C and calls
488 WRITE_CASE passing WC_DATA. */
490 flip_source_read (struct case_source *source,
492 write_case_func *write_case, write_case_data wc_data)
494 struct flip_pgm *flip = source->aux;
495 union value *input_buf;
498 input_buf = xmalloc (sizeof *input_buf * flip->case_cnt);
499 for (i = 0; i < flip->var_cnt; i++)
503 if (fread (input_buf, sizeof *input_buf, flip->case_cnt,
504 flip->file) != flip->case_cnt)
506 if (ferror (flip->file))
507 msg (SE, _("Error reading FLIP temporary file: %s."),
509 else if (feof (flip->file))
510 msg (SE, _("Unexpected end of file reading FLIP temporary file."));
516 for (j = 0; j < flip->case_cnt; j++)
517 case_data_rw (c, j)->f = input_buf[j].f;
518 if (!write_case (wc_data))
524 /* Destroy internal data in SOURCE. */
526 flip_source_destroy (struct case_source *source)
528 struct flip_pgm *flip = source->aux;
530 destroy_flip_pgm (flip);
533 static const struct case_source_class flip_source_class =