1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 1997-9, 2000, 2007, 2009-2011 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/cast.h"
30 #include "libpspp/hash-functions.h"
31 #include "libpspp/hmap.h"
32 #include "libpspp/message.h"
33 #include "libpspp/str.h"
35 #include "gl/ftoastr.h"
36 #include "gl/minmax.h"
37 #include "gl/xalloc.h"
40 #define _(msgid) gettext (msgid)
44 struct hmap_node hmap_node;
50 static bool parse_specification (struct lexer *, struct dictionary *,
51 struct hmap *dummies);
52 static bool parse_commands (struct lexer *, struct hmap *dummies);
53 static void destroy_dummies (struct hmap *dummies);
55 static bool parse_ids (struct lexer *, const struct dictionary *,
57 static bool parse_numbers (struct lexer *, struct dummy_var *);
58 static bool parse_strings (struct lexer *, struct dummy_var *);
61 cmd_do_repeat (struct lexer *lexer, struct dataset *ds)
66 if (!parse_specification (lexer, dataset_dict (ds), &dummies))
67 return CMD_CASCADING_FAILURE;
69 ok = parse_commands (lexer, &dummies);
71 destroy_dummies (&dummies);
73 return ok ? CMD_SUCCESS : CMD_CASCADING_FAILURE;
77 hash_dummy (const char *name, size_t name_len)
79 return hash_case_bytes (name, name_len, 0);
82 static const struct dummy_var *
83 find_dummy_var (struct hmap *hmap, const char *name, size_t name_len)
85 const struct dummy_var *dv;
87 HMAP_FOR_EACH_WITH_HASH (dv, struct dummy_var, hmap_node,
88 hash_dummy (name, name_len), hmap)
89 if (strcasecmp (dv->name, name))
95 /* Parses the whole DO REPEAT command specification.
98 parse_specification (struct lexer *lexer, struct dictionary *dict,
101 struct dummy_var *first_dv = NULL;
106 struct dummy_var *dv;
110 /* Get a stand-in variable name and make sure it's unique. */
111 if (!lex_force_id (lexer))
113 name = lex_tokcstr (lexer);
114 if (dict_lookup_var (dict, name))
115 msg (SW, _("Dummy variable name `%s' hides dictionary variable `%s'."),
117 if (find_dummy_var (dummies, name, strlen (name)))
119 msg (SE, _("Dummy variable name `%s' is given twice."), name);
123 /* Make a new macro. */
124 dv = xmalloc (sizeof *dv);
125 dv->name = xstrdup (name);
128 hmap_insert (dummies, &dv->hmap_node, hash_dummy (name, strlen (name)));
130 /* Skip equals sign. */
132 if (!lex_force_match (lexer, T_EQUALS))
135 /* Get the details of the variable's possible values. */
136 if (lex_token (lexer) == T_ID || lex_token (lexer) == T_ALL)
137 ok = parse_ids (lexer, dict, dv);
138 else if (lex_is_number (lexer))
139 ok = parse_numbers (lexer, dv);
140 else if (lex_is_string (lexer))
141 ok = parse_strings (lexer, dv);
144 lex_error (lexer, NULL);
149 assert (dv->n_values > 0);
150 if (lex_token (lexer) != T_SLASH && lex_token (lexer) != T_ENDCMD)
152 lex_error (lexer, NULL);
156 /* If this is the first variable then it defines how many replacements
157 there must be; otherwise enforce this number of replacements. */
158 if (first_dv == NULL)
160 else if (first_dv->n_values != dv->n_values)
162 msg (SE, _("Dummy variable `%s' had %d substitutions, so `%s' must "
163 "also, but %d were specified."),
164 first_dv->name, first_dv->n_values,
165 dv->name, dv->n_values);
169 lex_match (lexer, T_SLASH);
171 while (!lex_match (lexer, T_ENDCMD));
173 while (lex_match (lexer, T_ENDCMD))
179 destroy_dummies (dummies);
184 count_values (struct hmap *dummies)
186 const struct dummy_var *dv;
187 dv = HMAP_FIRST (struct dummy_var, hmap_node, dummies);
192 do_parse_commands (struct substring s, enum lex_syntax_mode syntax_mode,
193 struct hmap *dummies,
194 struct string *outputs, size_t n_outputs)
196 struct segmenter segmenter;
198 segmenter_init (&segmenter, syntax_mode);
200 while (!ss_is_empty (s))
202 enum segment_type type;
205 n = segmenter_push (&segmenter, s.string, s.length, &type);
208 if (type == SEG_DO_REPEAT_COMMAND)
214 k = segmenter_push (&segmenter, s.string + n, s.length - n,
216 if (type != SEG_NEWLINE && type != SEG_DO_REPEAT_COMMAND)
222 do_parse_commands (ss_head (s, n), syntax_mode, dummies,
225 else if (type != SEG_END)
227 const struct dummy_var *dv;
230 dv = (type == SEG_IDENTIFIER
231 ? find_dummy_var (dummies, s.string, n)
233 for (i = 0; i < n_outputs; i++)
235 ds_put_cstr (&outputs[i], dv->values[i]);
237 ds_put_substring (&outputs[i], ss_head (s, n));
245 parse_commands (struct lexer *lexer, struct hmap *dummies)
247 struct string *outputs;
256 if (lex_get_file_name (lexer) != NULL)
257 file_name = xstrdup (lex_get_file_name (lexer));
260 line_number = lex_get_first_line_number (lexer, 0);
262 ds_init_empty (&input);
263 while (lex_is_string (lexer))
265 ds_put_substring (&input, lex_tokss (lexer));
266 ds_put_byte (&input, '\n');
269 if (ds_is_empty (&input))
270 ds_put_byte (&input, '\n');
271 ds_put_byte (&input, '\0');
272 input_len = ds_length (&input);
274 n_values = count_values (dummies);
275 outputs = xmalloc (n_values * sizeof *outputs);
276 for (i = 0; i < n_values; i++)
277 ds_init_empty (&outputs[i]);
279 do_parse_commands (ds_ss (&input), lex_get_syntax_mode (lexer),
280 dummies, outputs, n_values);
284 while (lex_match (lexer, T_ENDCMD))
287 ok = (lex_force_match_id (lexer, "END")
288 && lex_force_match_id (lexer, "REPEAT"));
290 lex_match_id (lexer, "PRINT"); /* XXX */
292 lex_discard_rest_of_command (lexer);
294 for (i = 0; i < n_values; i++)
296 struct string *output = &outputs[n_values - i - 1];
297 struct lex_reader *reader;
299 reader = lex_reader_for_substring_nocopy (ds_ss (output));
300 lex_reader_set_file_name (reader, file_name);
301 reader->line_number = line_number;
302 lex_include (lexer, reader);
310 destroy_dummies (struct hmap *dummies)
312 struct dummy_var *dv, *next;
314 HMAP_FOR_EACH_SAFE (dv, next, struct dummy_var, hmap_node, dummies)
318 hmap_delete (dummies, &dv->hmap_node);
321 for (i = 0; i < dv->n_values; i++)
322 free (dv->values[i]);
326 hmap_destroy (dummies);
329 /* Parses a set of ids for DO REPEAT. */
331 parse_ids (struct lexer *lexer, const struct dictionary *dict,
332 struct dummy_var *dv)
334 return parse_mixed_vars (lexer, dict, &dv->values, &dv->n_values, PV_NONE);
337 /* Adds REPLACEMENT to MACRO's list of replacements, which has
338 *USED elements and has room for *ALLOCATED. Allocates memory
341 add_replacement (struct dummy_var *dv, char *value, size_t *allocated)
343 if (dv->n_values == *allocated)
344 dv->values = x2nrealloc (dv->values, allocated, sizeof *dv->values);
345 dv->values[dv->n_values++] = value;
348 /* Parses a list or range of numbers for DO REPEAT. */
350 parse_numbers (struct lexer *lexer, struct dummy_var *dv)
352 size_t allocated = 0;
356 if (!lex_force_num (lexer))
359 if (lex_next_token (lexer, 1) == T_TO)
364 if (!lex_is_integer (lexer))
366 msg (SE, _("Ranges may only have integer bounds."));
370 a = lex_integer (lexer);
374 if (!lex_force_int (lexer))
377 b = lex_integer (lexer);
380 msg (SE, _("%ld TO %ld is an invalid range."), a, b);
385 for (i = a; i <= b; i++)
386 add_replacement (dv, xasprintf ("%ld", i), &allocated);
390 char s[DBL_BUFSIZE_BOUND];
392 dtoastr (s, sizeof s, 0, 0, lex_number (lexer));
393 add_replacement (dv, xstrdup (s), &allocated);
397 lex_match (lexer, T_COMMA);
399 while (lex_token (lexer) != T_SLASH && lex_token (lexer) != T_ENDCMD);
404 /* Parses a list of strings for DO REPEAT. */
406 parse_strings (struct lexer *lexer, struct dummy_var *dv)
408 size_t allocated = 0;
412 if (!lex_force_string (lexer))
414 msg (SE, _("String expected."));
418 add_replacement (dv, token_to_string (lex_next (lexer, 0)), &allocated);
421 lex_match (lexer, T_COMMA);
423 while (lex_token (lexer) != T_SLASH && lex_token (lexer) != T_ENDCMD);
429 cmd_end_repeat (struct lexer *lexer UNUSED, struct dataset *ds UNUSED)
431 msg (SE, _("No matching DO REPEAT."));
432 return CMD_CASCADING_FAILURE;