1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 1997-9, 2000, 2007, 2009, 2010, 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/dictionary.h"
22 #include "data/procedure.h"
23 #include "language/command.h"
24 #include "language/lexer/lexer.h"
25 #include "language/lexer/segment.h"
26 #include "language/lexer/token.h"
27 #include "language/lexer/variable-parser.h"
28 #include "libpspp/cast.h"
29 #include "libpspp/hash-functions.h"
30 #include "libpspp/hmap.h"
31 #include "libpspp/message.h"
32 #include "libpspp/str.h"
34 #include "gl/ftoastr.h"
35 #include "gl/minmax.h"
36 #include "gl/xalloc.h"
39 #define _(msgid) gettext (msgid)
43 struct hmap_node hmap_node;
49 static bool parse_specification (struct lexer *, struct dictionary *,
50 struct hmap *dummies);
51 static bool parse_commands (struct lexer *, struct hmap *dummies);
52 static void destroy_dummies (struct hmap *dummies);
54 static bool parse_ids (struct lexer *, const struct dictionary *,
56 static bool parse_numbers (struct lexer *, struct dummy_var *);
57 static bool parse_strings (struct lexer *, struct dummy_var *);
60 cmd_do_repeat (struct lexer *lexer, struct dataset *ds)
65 if (!parse_specification (lexer, dataset_dict (ds), &dummies))
66 return CMD_CASCADING_FAILURE;
68 ok = parse_commands (lexer, &dummies);
70 destroy_dummies (&dummies);
72 return ok ? CMD_SUCCESS : CMD_CASCADING_FAILURE;
76 hash_dummy (const char *name, size_t name_len)
78 return hash_case_bytes (name, name_len, 0);
81 static const struct dummy_var *
82 find_dummy_var (struct hmap *hmap, const char *name, size_t name_len)
84 const struct dummy_var *dv;
86 HMAP_FOR_EACH_WITH_HASH (dv, struct dummy_var, hmap_node,
87 hash_dummy (name, name_len), hmap)
88 if (strcasecmp (dv->name, name))
94 /* Parses the whole DO REPEAT command specification.
97 parse_specification (struct lexer *lexer, struct dictionary *dict,
100 struct dummy_var *first_dv = NULL;
105 struct dummy_var *dv;
109 /* Get a stand-in variable name and make sure it's unique. */
110 if (!lex_force_id (lexer))
112 name = lex_tokcstr (lexer);
113 if (dict_lookup_var (dict, name))
114 msg (SW, _("Dummy variable name `%s' hides dictionary variable `%s'."),
116 if (find_dummy_var (dummies, name, strlen (name)))
118 msg (SE, _("Dummy variable name `%s' is given twice."), name);
122 /* Make a new macro. */
123 dv = xmalloc (sizeof *dv);
124 dv->name = xstrdup (name);
127 hmap_insert (dummies, &dv->hmap_node, hash_dummy (name, strlen (name)));
129 /* Skip equals sign. */
131 if (!lex_force_match (lexer, T_EQUALS))
134 /* Get the details of the variable's possible values. */
135 if (lex_token (lexer) == T_ID || lex_token (lexer) == T_ALL)
136 ok = parse_ids (lexer, dict, dv);
137 else if (lex_is_number (lexer))
138 ok = parse_numbers (lexer, dv);
139 else if (lex_is_string (lexer))
140 ok = parse_strings (lexer, dv);
143 lex_error (lexer, NULL);
148 assert (dv->n_values > 0);
149 if (lex_token (lexer) != T_SLASH && lex_token (lexer) != T_ENDCMD)
151 lex_error (lexer, NULL);
155 /* If this is the first variable then it defines how many replacements
156 there must be; otherwise enforce this number of replacements. */
157 if (first_dv == NULL)
159 else if (first_dv->n_values != dv->n_values)
161 msg (SE, _("Dummy variable `%s' had %d substitutions, so `%s' must "
162 "also, but %d were specified."),
163 first_dv->name, first_dv->n_values,
164 dv->name, dv->n_values);
168 lex_match (lexer, T_SLASH);
170 while (!lex_match (lexer, T_ENDCMD));
172 while (lex_match (lexer, T_ENDCMD))
178 destroy_dummies (dummies);
183 count_values (struct hmap *dummies)
185 const struct dummy_var *dv;
186 dv = HMAP_FIRST (struct dummy_var, hmap_node, dummies);
191 do_parse_commands (struct substring s, enum lex_syntax_mode syntax_mode,
192 struct hmap *dummies,
193 struct string *outputs, size_t n_outputs)
195 struct segmenter segmenter;
197 segmenter_init (&segmenter, syntax_mode);
199 while (!ss_is_empty (s))
201 enum segment_type type;
204 n = segmenter_push (&segmenter, s.string, s.length, &type);
207 if (type == SEG_DO_REPEAT_COMMAND)
213 k = segmenter_push (&segmenter, s.string + n, s.length - n,
215 if (type != SEG_NEWLINE && type != SEG_DO_REPEAT_COMMAND)
221 do_parse_commands (ss_head (s, n), syntax_mode, dummies,
224 else if (type != SEG_END)
226 const struct dummy_var *dv;
229 dv = (type == SEG_IDENTIFIER
230 ? find_dummy_var (dummies, s.string, n)
232 for (i = 0; i < n_outputs; i++)
234 ds_put_cstr (&outputs[i], dv->values[i]);
236 ds_put_substring (&outputs[i], ss_head (s, n));
244 parse_commands (struct lexer *lexer, struct hmap *dummies)
246 struct string *outputs;
255 if (lex_get_file_name (lexer) != NULL)
256 file_name = xstrdup (lex_get_file_name (lexer));
259 line_number = lex_get_first_line_number (lexer, 0);
261 ds_init_empty (&input);
262 while (lex_is_string (lexer))
264 ds_put_substring (&input, lex_tokss (lexer));
265 ds_put_byte (&input, '\n');
268 if (ds_is_empty (&input))
269 ds_put_byte (&input, '\n');
270 ds_put_byte (&input, '\0');
271 input_len = ds_length (&input);
273 n_values = count_values (dummies);
274 outputs = xmalloc (n_values * sizeof *outputs);
275 for (i = 0; i < n_values; i++)
276 ds_init_empty (&outputs[i]);
278 do_parse_commands (ds_ss (&input), lex_get_syntax_mode (lexer),
279 dummies, outputs, n_values);
283 while (lex_match (lexer, T_ENDCMD))
286 ok = (lex_force_match_id (lexer, "END")
287 && lex_force_match_id (lexer, "REPEAT"));
289 lex_match_id (lexer, "PRINT"); /* XXX */
291 lex_discard_rest_of_command (lexer);
293 for (i = 0; i < n_values; i++)
295 struct string *output = &outputs[n_values - i - 1];
296 struct lex_reader *reader;
298 reader = lex_reader_for_substring_nocopy (ds_ss (output));
299 lex_reader_set_file_name (reader, file_name);
300 reader->line_number = line_number;
301 lex_include (lexer, reader);
309 destroy_dummies (struct hmap *dummies)
311 struct dummy_var *dv, *next;
313 HMAP_FOR_EACH_SAFE (dv, next, struct dummy_var, hmap_node, dummies)
317 hmap_delete (dummies, &dv->hmap_node);
320 for (i = 0; i < dv->n_values; i++)
321 free (dv->values[i]);
325 hmap_destroy (dummies);
328 /* Parses a set of ids for DO REPEAT. */
330 parse_ids (struct lexer *lexer, const struct dictionary *dict,
331 struct dummy_var *dv)
333 return parse_mixed_vars (lexer, dict, &dv->values, &dv->n_values, PV_NONE);
336 /* Adds REPLACEMENT to MACRO's list of replacements, which has
337 *USED elements and has room for *ALLOCATED. Allocates memory
340 add_replacement (struct dummy_var *dv, char *value, size_t *allocated)
342 if (dv->n_values == *allocated)
343 dv->values = x2nrealloc (dv->values, allocated, sizeof *dv->values);
344 dv->values[dv->n_values++] = value;
347 /* Parses a list or range of numbers for DO REPEAT. */
349 parse_numbers (struct lexer *lexer, struct dummy_var *dv)
351 size_t allocated = 0;
355 if (!lex_force_num (lexer))
358 if (lex_next_token (lexer, 1) == T_TO)
363 if (!lex_is_integer (lexer))
365 msg (SE, _("Ranges may only have integer bounds."));
369 a = lex_integer (lexer);
373 if (!lex_force_int (lexer))
376 b = lex_integer (lexer);
379 msg (SE, _("%ld TO %ld is an invalid range."), a, b);
384 for (i = a; i <= b; i++)
385 add_replacement (dv, xasprintf ("%ld", i), &allocated);
389 char s[DBL_BUFSIZE_BOUND];
391 dtoastr (s, sizeof s, 0, 0, lex_number (lexer));
392 add_replacement (dv, xstrdup (s), &allocated);
396 lex_match (lexer, T_COMMA);
398 while (lex_token (lexer) != T_SLASH && lex_token (lexer) != T_ENDCMD);
403 /* Parses a list of strings for DO REPEAT. */
405 parse_strings (struct lexer *lexer, struct dummy_var *dv)
407 size_t allocated = 0;
411 if (!lex_force_string (lexer))
413 msg (SE, _("String expected."));
417 add_replacement (dv, token_to_string (lex_next (lexer, 0)), &allocated);
420 lex_match (lexer, T_COMMA);
422 while (lex_token (lexer) != T_SLASH && lex_token (lexer) != T_ENDCMD);
428 cmd_end_repeat (struct lexer *lexer UNUSED, struct dataset *ds UNUSED)
430 msg (SE, _("No matching DO REPEAT."));
431 return CMD_CASCADING_FAILURE;