1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 1997-9, 2000, 2007, 2009-2012 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/>. */
21 #include "data/dataset.h"
22 #include "data/dictionary.h"
23 #include "data/settings.h"
24 #include "language/command.h"
25 #include "language/lexer/lexer.h"
26 #include "language/lexer/segment.h"
27 #include "language/lexer/token.h"
28 #include "language/lexer/variable-parser.h"
29 #include "libpspp/assertion.h"
30 #include "libpspp/cast.h"
31 #include "libpspp/hash-functions.h"
32 #include "libpspp/hmap.h"
33 #include "libpspp/i18n.h"
34 #include "libpspp/message.h"
35 #include "libpspp/str.h"
36 #include "libpspp/misc.h"
38 #include "gl/ftoastr.h"
39 #include "gl/minmax.h"
40 #include "gl/xalloc.h"
43 #define _(msgid) gettext (msgid)
47 struct hmap_node hmap_node;
53 static bool parse_specification (struct lexer *, struct dictionary *,
54 struct hmap *dummies);
55 static bool parse_commands (struct lexer *, struct hmap *dummies);
56 static void destroy_dummies (struct hmap *dummies);
58 static bool parse_ids (struct lexer *, const struct dictionary *,
60 static bool parse_numbers (struct lexer *, struct dummy_var *);
61 static bool parse_strings (struct lexer *, struct dummy_var *);
64 cmd_do_repeat (struct lexer *lexer, struct dataset *ds)
69 if (!parse_specification (lexer, dataset_dict (ds), &dummies))
70 return CMD_CASCADING_FAILURE;
72 ok = parse_commands (lexer, &dummies);
74 destroy_dummies (&dummies);
76 return ok ? CMD_SUCCESS : CMD_CASCADING_FAILURE;
80 hash_dummy (const char *name, size_t name_len)
82 return utf8_hash_case_bytes (name, name_len, 0);
85 static const struct dummy_var *
86 find_dummy_var (struct hmap *hmap, const char *name, size_t name_len)
88 const struct dummy_var *dv;
90 HMAP_FOR_EACH_WITH_HASH (dv, struct dummy_var, hmap_node,
91 hash_dummy (name, name_len), hmap)
92 if (utf8_strcasecmp (dv->name, name))
98 /* Parses the whole DO REPEAT command specification.
101 parse_specification (struct lexer *lexer, struct dictionary *dict,
102 struct hmap *dummies)
104 struct dummy_var *first_dv = NULL;
109 struct dummy_var *dv;
113 /* Get a stand-in variable name and make sure it's unique. */
114 if (!lex_force_id (lexer))
116 name = lex_tokcstr (lexer);
117 if (dict_lookup_var (dict, name))
118 msg (SW, _("Dummy variable name `%s' hides dictionary variable `%s'."),
120 if (find_dummy_var (dummies, name, strlen (name)))
122 msg (SE, _("Dummy variable name `%s' is given twice."), name);
126 /* Make a new macro. */
127 dv = xmalloc (sizeof *dv);
128 dv->name = xstrdup (name);
131 hmap_insert (dummies, &dv->hmap_node, hash_dummy (name, strlen (name)));
133 /* Skip equals sign. */
135 if (!lex_force_match (lexer, T_EQUALS))
138 /* Get the details of the variable's possible values. */
139 if (lex_token (lexer) == T_ID || lex_token (lexer) == T_ALL)
140 ok = parse_ids (lexer, dict, dv);
141 else if (lex_is_number (lexer))
142 ok = parse_numbers (lexer, dv);
143 else if (lex_is_string (lexer))
144 ok = parse_strings (lexer, dv);
147 lex_error (lexer, NULL);
152 assert (dv->n_values > 0);
153 if (lex_token (lexer) != T_SLASH && lex_token (lexer) != T_ENDCMD)
155 lex_error (lexer, NULL);
159 /* If this is the first variable then it defines how many replacements
160 there must be; otherwise enforce this number of replacements. */
161 if (first_dv == NULL)
163 else if (first_dv->n_values != dv->n_values)
165 msg (SE, _("Dummy variable `%s' had %zu substitutions, so `%s' must "
166 "also, but %zu were specified."),
167 first_dv->name, first_dv->n_values,
168 dv->name, dv->n_values);
172 lex_match (lexer, T_SLASH);
174 while (!lex_match (lexer, T_ENDCMD));
176 while (lex_match (lexer, T_ENDCMD))
182 destroy_dummies (dummies);
187 count_values (struct hmap *dummies)
189 const struct dummy_var *dv;
190 dv = HMAP_FIRST (struct dummy_var, hmap_node, dummies);
195 do_parse_commands (struct substring s, enum segmenter_mode mode,
196 struct hmap *dummies,
197 struct string *outputs, size_t n_outputs)
199 struct segmenter segmenter;
201 segmenter_init (&segmenter, mode);
203 while (!ss_is_empty (s))
205 enum segment_type type;
208 n = segmenter_push (&segmenter, s.string, s.length, &type);
211 if (type == SEG_DO_REPEAT_COMMAND)
217 k = segmenter_push (&segmenter, s.string + n, s.length - n,
219 if (type != SEG_NEWLINE && type != SEG_DO_REPEAT_COMMAND)
225 do_parse_commands (ss_head (s, n), mode, dummies,
228 else if (type != SEG_END)
230 const struct dummy_var *dv;
233 dv = (type == SEG_IDENTIFIER
234 ? find_dummy_var (dummies, s.string, n)
236 for (i = 0; i < n_outputs; i++)
238 ds_put_cstr (&outputs[i], dv->values[i]);
240 ds_put_substring (&outputs[i], ss_head (s, n));
248 parse_commands (struct lexer *lexer, struct hmap *dummies)
250 enum lex_syntax_mode syntax_mode;
251 enum segmenter_mode mode;
252 struct string *outputs;
260 if (lex_get_file_name (lexer) != NULL)
261 file_name = xstrdup (lex_get_file_name (lexer));
264 line_number = lex_get_first_line_number (lexer, 0);
266 ds_init_empty (&input);
267 while (lex_is_string (lexer))
269 ds_put_substring (&input, lex_tokss (lexer));
270 ds_put_byte (&input, '\n');
273 if (ds_is_empty (&input))
274 ds_put_byte (&input, '\n');
275 ds_put_byte (&input, '\0');
277 n_values = count_values (dummies);
278 outputs = xmalloc (n_values * sizeof *outputs);
279 for (i = 0; i < n_values; i++)
280 ds_init_empty (&outputs[i]);
282 syntax_mode = lex_get_syntax_mode (lexer);
283 if (syntax_mode == LEX_SYNTAX_AUTO)
284 mode = SEG_MODE_AUTO;
285 else if (syntax_mode == LEX_SYNTAX_INTERACTIVE)
286 mode = SEG_MODE_INTERACTIVE;
287 else if (syntax_mode == LEX_SYNTAX_BATCH)
288 mode = SEG_MODE_BATCH;
291 do_parse_commands (ds_ss (&input), mode, dummies, outputs, n_values);
295 while (lex_match (lexer, T_ENDCMD))
298 ok = (lex_force_match_id (lexer, "END")
299 && lex_force_match_id (lexer, "REPEAT"));
301 lex_match_id (lexer, "PRINT"); /* XXX */
303 lex_discard_rest_of_command (lexer);
305 for (i = 0; i < n_values; i++)
307 struct string *output = &outputs[n_values - i - 1];
308 struct lex_reader *reader;
310 reader = lex_reader_for_substring_nocopy (ds_ss (output));
311 lex_reader_set_file_name (reader, file_name);
312 reader->line_number = line_number;
313 lex_include (lexer, reader);
322 destroy_dummies (struct hmap *dummies)
324 struct dummy_var *dv, *next;
326 HMAP_FOR_EACH_SAFE (dv, next, struct dummy_var, hmap_node, dummies)
330 hmap_delete (dummies, &dv->hmap_node);
333 for (i = 0; i < dv->n_values; i++)
334 free (dv->values[i]);
338 hmap_destroy (dummies);
341 /* Parses a set of ids for DO REPEAT. */
343 parse_ids (struct lexer *lexer, const struct dictionary *dict,
344 struct dummy_var *dv)
346 return parse_mixed_vars (lexer, dict, &dv->values, &dv->n_values, PV_NONE);
349 /* Adds REPLACEMENT to MACRO's list of replacements, which has
350 *USED elements and has room for *ALLOCATED. Allocates memory
353 add_replacement (struct dummy_var *dv, char *value, size_t *allocated)
355 if (dv->n_values == *allocated)
356 dv->values = x2nrealloc (dv->values, allocated, sizeof *dv->values);
357 dv->values[dv->n_values++] = value;
360 /* Parses a list or range of numbers for DO REPEAT. */
362 parse_numbers (struct lexer *lexer, struct dummy_var *dv)
364 size_t allocated = 0;
368 if (!lex_force_num (lexer))
371 if (lex_next_token (lexer, 1) == T_TO)
376 if (!lex_is_integer (lexer))
378 msg (SE, _("Ranges may only have integer bounds."));
382 a = lex_integer (lexer);
386 if (!lex_force_int (lexer))
389 b = lex_integer (lexer);
392 msg (SE, _("%ld TO %ld is an invalid range."), a, b);
397 for (i = a; i <= b; i++)
398 add_replacement (dv, xasprintf ("%ld", i), &allocated);
402 char s[DBL_BUFSIZE_BOUND];
404 c_dtoastr (s, sizeof s, 0, 0, lex_number (lexer));
405 add_replacement (dv, xstrdup (s), &allocated);
409 lex_match (lexer, T_COMMA);
411 while (lex_token (lexer) != T_SLASH && lex_token (lexer) != T_ENDCMD);
416 /* Parses a list of strings for DO REPEAT. */
418 parse_strings (struct lexer *lexer, struct dummy_var *dv)
420 size_t allocated = 0;
424 if (!lex_force_string (lexer))
429 add_replacement (dv, token_to_string (lex_next (lexer, 0)), &allocated);
432 lex_match (lexer, T_COMMA);
434 while (lex_token (lexer) != T_SLASH && lex_token (lexer) != T_ENDCMD);
440 cmd_end_repeat (struct lexer *lexer UNUSED, struct dataset *ds UNUSED)
442 msg (SE, _("No matching DO REPEAT."));
443 return CMD_CASCADING_FAILURE;