1 /* PSPP - computes sample statistics.
2 Copyright (C) 1997-9, 2000, 2006 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
21 #include <language/data-io/data-list.h>
22 #include <libpspp/message.h>
27 #include <libpspp/alloc.h>
28 #include <data/case.h>
29 #include <language/command.h>
30 #include <libpspp/compiler.h>
31 #include <data/data-in.h>
32 #include <libpspp/debug-print.h>
33 #include <language/data-io/data-reader.h>
34 #include <data/dictionary.h>
35 #include <libpspp/message.h>
36 #include <language/data-io/file-handle.h>
37 #include <data/format.h>
38 #include <language/lexer/lexer.h>
39 #include <libpspp/misc.h>
40 #include <data/settings.h>
41 #include <libpspp/str.h>
42 #include <output/table.h>
43 #include <data/variable.h>
44 #include <procedure.h>
46 #include "data-list.h"
49 #define _(msgid) gettext (msgid)
51 /* Utility function. */
53 /* FIXME: Either REPEATING DATA must be the last transformation, or we
54 must multiplex the transformations that follow (i.e., perform them
55 for every case that we produce from a repetition instance).
56 Currently we do neither. We should do one or the other. */
58 /* Describes how to parse one variable. */
61 struct dls_var_spec *next; /* Next specification in list. */
63 /* Both free and fixed formats. */
64 struct fmt_spec input; /* Input format of this field. */
65 struct variable *v; /* Associated variable. Used only in
66 parsing. Not safe later. */
67 int fv; /* First value in case. */
69 /* Fixed format only. */
70 int rec; /* Record number (1-based). */
71 int fc, lc; /* Column numbers in record. */
73 /* Free format only. */
74 char name[LONG_NAME_LEN + 1]; /* Name of variable. */
77 /* Constants for DATA LIST type. */
78 /* Must match table in cmd_data_list(). */
86 /* DATA LIST private data structure. */
89 struct dls_var_spec *first, *last; /* Variable parsing specifications. */
90 struct dfm_reader *reader; /* Data file reader. */
92 int type; /* A DLS_* constant. */
93 struct variable *end; /* Variable specified on END subcommand. */
94 int rec_cnt; /* Number of records. */
95 size_t case_size; /* Case size in bytes. */
96 char *delims; /* Delimiters if any; not null-terminated. */
97 size_t delim_cnt; /* Number of delimiter, or 0 for spaces. */
100 static const struct case_source_class data_list_source_class;
102 static int parse_fixed (struct data_list_pgm *);
103 static int parse_free (struct dls_var_spec **, struct dls_var_spec **);
104 static void dump_fixed_table (const struct dls_var_spec *,
105 const struct file_handle *, int rec_cnt);
106 static void dump_free_table (const struct data_list_pgm *,
107 const struct file_handle *);
108 static void destroy_dls_var_spec (struct dls_var_spec *);
109 static trns_free_func data_list_trns_free;
110 static trns_proc_func data_list_trns_proc;
112 /* Message title for REPEATING DATA. */
113 #define RPD_ERR "REPEATING DATA: "
118 struct data_list_pgm *dls;
119 int table = -1; /* Print table if nonzero, -1=undecided. */
120 struct file_handle *fh = fh_inline_file ();
122 if (!case_source_is_complex (vfm_source))
123 discard_variables ();
125 dls = xmalloc (sizeof *dls);
132 dls->first = dls->last = NULL;
136 if (lex_match_id ("FILE"))
139 fh = fh_parse (FH_REF_FILE | FH_REF_INLINE);
142 if (case_source_is_class (vfm_source, &file_type_source_class)
143 && fh != fh_get_default_handle ())
145 msg (SE, _("DATA LIST must use the same file "
146 "as the enclosing FILE TYPE."));
150 else if (lex_match_id ("RECORDS"))
154 if (!lex_force_int ())
156 dls->rec_cnt = lex_integer ();
160 else if (lex_match_id ("END"))
164 msg (SE, _("The END subcommand may only be specified once."));
169 if (!lex_force_id ())
171 dls->end = dict_lookup_var (default_dict, tokid);
173 dls->end = dict_create_var_assert (default_dict, tokid, 0);
176 else if (token == T_ID)
178 if (lex_match_id ("NOTABLE"))
180 else if (lex_match_id ("TABLE"))
185 if (lex_match_id ("FIXED"))
187 else if (lex_match_id ("FREE"))
189 else if (lex_match_id ("LIST"))
199 msg (SE, _("Only one of FIXED, FREE, or LIST may "
205 if ((dls->type == DLS_FREE || dls->type == DLS_LIST)
208 while (!lex_match (')'))
212 if (lex_match_id ("TAB"))
214 else if (token == T_STRING && tokstr.length == 1)
216 delim = tokstr.string[0];
225 dls->delims = xrealloc (dls->delims, dls->delim_cnt + 1);
226 dls->delims[dls->delim_cnt++] = delim;
240 dls->case_size = dict_get_case_size (default_dict);
241 fh_set_default_handle (fh);
244 dls->type = DLS_FIXED;
248 if (dls->type == DLS_FREE)
254 if (dls->type == DLS_FIXED)
256 if (!parse_fixed (dls))
259 dump_fixed_table (dls->first, fh, dls->rec_cnt);
263 if (!parse_free (&dls->first, &dls->last))
266 dump_free_table (dls, fh);
269 dls->reader = dfm_open_reader (fh);
270 if (dls->reader == NULL)
273 if (vfm_source != NULL)
274 add_transformation (data_list_trns_proc, data_list_trns_free, dls);
276 vfm_source = create_case_source (&data_list_source_class, dls);
281 data_list_trns_free (dls);
282 return CMD_CASCADING_FAILURE;
285 /* Adds SPEC to the linked list with head at FIRST and tail at
288 append_var_spec (struct dls_var_spec **first, struct dls_var_spec **last,
289 struct dls_var_spec *spec)
296 (*last)->next = spec;
300 /* Fixed-format parsing. */
302 /* Used for chaining together fortran-like format specifiers. */
305 struct fmt_list *next;
308 struct fmt_list *down;
311 /* State of parsing DATA LIST. */
312 struct fixed_parsing_state
314 char **name; /* Variable names. */
315 size_t name_cnt; /* Number of names. */
317 int recno; /* Index of current record. */
318 int sc; /* 1-based column number of starting column for
319 next field to output. */
322 static int fixed_parse_compatible (struct fixed_parsing_state *,
323 struct dls_var_spec **,
324 struct dls_var_spec **);
325 static int fixed_parse_fortran (struct fixed_parsing_state *,
326 struct dls_var_spec **,
327 struct dls_var_spec **);
329 /* Parses all the variable specifications for DATA LIST FIXED,
330 storing them into DLS. Returns nonzero if successful. */
332 parse_fixed (struct data_list_pgm *dls)
334 struct fixed_parsing_state fx;
342 while (lex_match ('/'))
345 if (lex_is_integer ())
347 if (lex_integer () < fx.recno)
349 msg (SE, _("The record number specified, %ld, is "
350 "before the previous record, %d. Data "
351 "fields must be listed in order of "
352 "increasing record number."),
353 lex_integer (), fx.recno - 1);
357 fx.recno = lex_integer ();
363 if (!parse_DATA_LIST_vars (&fx.name, &fx.name_cnt, PV_NONE))
366 if (lex_is_number ())
368 if (!fixed_parse_compatible (&fx, &dls->first, &dls->last))
371 else if (token == '(')
373 if (!fixed_parse_fortran (&fx, &dls->first, &dls->last))
378 msg (SE, _("SPSS-like or FORTRAN-like format "
379 "specification expected after variable names."));
383 for (i = 0; i < fx.name_cnt; i++)
387 if (dls->first == NULL)
389 msg (SE, _("At least one variable must be specified."));
392 if (dls->rec_cnt && dls->last->rec > dls->rec_cnt)
394 msg (SE, _("Variables are specified on records that "
395 "should not exist according to RECORDS subcommand."));
398 else if (!dls->rec_cnt)
399 dls->rec_cnt = dls->last->rec;
400 return lex_end_of_command () == CMD_SUCCESS;
403 for (i = 0; i < fx.name_cnt; i++)
409 /* Parses a variable specification in the form 1-10 (A) based on
410 FX and adds specifications to the linked list with head at
411 FIRST and tail at LAST. */
413 fixed_parse_compatible (struct fixed_parsing_state *fx,
414 struct dls_var_spec **first, struct dls_var_spec **last)
416 struct fmt_spec input;
422 if (!lex_force_int ())
427 msg (SE, _("Column positions for fields must be positive."));
433 lex_negative_to_dash ();
436 if (!lex_force_int ())
441 msg (SE, _("Column positions for fields must be positive."));
446 msg (SE, _("The ending column for a field must be "
447 "greater than the starting column."));
456 /* Divide columns evenly. */
457 input.w = (lc - fc + 1) / fx->name_cnt;
458 if ((lc - fc + 1) % fx->name_cnt)
460 msg (SE, _("The %d columns %d-%d "
461 "can't be evenly divided into %d fields."),
462 lc - fc + 1, fc, lc, fx->name_cnt);
466 /* Format specifier. */
469 struct fmt_desc *fdp;
475 input.type = parse_format_specifier_name (&cp, 0);
476 if (input.type == -1)
480 msg (SE, _("A format specifier on this line "
481 "has extra characters on the end."));
491 if (lex_is_integer ())
493 if (lex_integer () < 1)
495 msg (SE, _("The value for number of decimal places "
496 "must be at least 1."));
500 input.d = lex_integer ();
506 fdp = &formats[input.type];
507 if (fdp->n_args < 2 && input.d)
509 msg (SE, _("Input format %s doesn't accept decimal places."),
517 if (!lex_force_match (')'))
525 if (!check_input_specifier (&input, 1))
528 /* Start column for next specification. */
531 /* Width of variables to create. */
532 if (input.type == FMT_A || input.type == FMT_AHEX)
537 /* Create variables and var specs. */
538 for (i = 0; i < fx->name_cnt; i++)
540 struct dls_var_spec *spec;
543 v = dict_create_var (default_dict, fx->name[i], width);
546 convert_fmt_ItoO (&input, &v->print);
548 if (!case_source_is_complex (vfm_source))
553 v = dict_lookup_var_assert (default_dict, fx->name[i]);
554 if (vfm_source == NULL)
556 msg (SE, _("%s is a duplicate variable name."), fx->name[i]);
559 if ((width != 0) != (v->width != 0))
561 msg (SE, _("There is already a variable %s of a "
566 if (width != 0 && width != v->width)
568 msg (SE, _("There is already a string variable %s of a "
569 "different width."), fx->name[i]);
574 spec = xmalloc (sizeof *spec);
578 spec->rec = fx->recno;
579 spec->fc = fc + input.w * i;
580 spec->lc = spec->fc + input.w - 1;
581 append_var_spec (first, last, spec);
586 /* Destroy format list F and, if RECURSE is nonzero, all its
589 destroy_fmt_list (struct fmt_list *f, int recurse)
591 struct fmt_list *next;
596 if (recurse && f->f.type == FMT_DESCEND)
597 destroy_fmt_list (f->down, 1);
602 /* Takes a hierarchically structured fmt_list F as constructed by
603 fixed_parse_fortran(), and flattens it, adding the variable
604 specifications to the linked list with head FIRST and tail
605 LAST. NAME_IDX is used to take values from the list of names
606 in FX; it should initially point to a value of 0. */
608 dump_fmt_list (struct fixed_parsing_state *fx, struct fmt_list *f,
609 struct dls_var_spec **first, struct dls_var_spec **last,
614 for (; f; f = f->next)
615 if (f->f.type == FMT_X)
617 else if (f->f.type == FMT_T)
619 else if (f->f.type == FMT_NEWREC)
621 fx->recno += f->count;
625 for (i = 0; i < f->count; i++)
626 if (f->f.type == FMT_DESCEND)
628 if (!dump_fmt_list (fx, f->down, first, last, name_idx))
633 struct dls_var_spec *spec;
637 if (formats[f->f.type].cat & FCAT_STRING)
641 if (*name_idx >= fx->name_cnt)
643 msg (SE, _("The number of format "
644 "specifications exceeds the given number of "
649 v = dict_create_var (default_dict, fx->name[(*name_idx)++], width);
652 msg (SE, _("%s is a duplicate variable name."), fx->name[i]);
656 if (!case_source_is_complex (vfm_source))
659 spec = xmalloc (sizeof *spec);
663 spec->rec = fx->recno;
665 spec->lc = fx->sc + f->f.w - 1;
666 append_var_spec (first, last, spec);
668 convert_fmt_ItoO (&spec->input, &v->print);
676 /* Recursively parses a FORTRAN-like format specification into
677 the linked list with head FIRST and tail TAIL. LEVEL is the
678 level of recursion, starting from 0. Returns the parsed
679 specification if successful, or a null pointer on failure. */
680 static struct fmt_list *
681 fixed_parse_fortran_internal (struct fixed_parsing_state *fx,
682 struct dls_var_spec **first,
683 struct dls_var_spec **last)
685 struct fmt_list *head = NULL;
686 struct fmt_list *tail = NULL;
688 lex_force_match ('(');
692 struct fmt_list *new = xmalloc (sizeof *new);
695 /* Append new to list. */
703 if (lex_is_integer ())
705 new->count = lex_integer ();
711 /* Parse format specifier. */
714 new->f.type = FMT_DESCEND;
715 new->down = fixed_parse_fortran_internal (fx, first, last);
716 if (new->down == NULL)
719 else if (lex_match ('/'))
720 new->f.type = FMT_NEWREC;
721 else if (!parse_format_specifier (&new->f, FMTP_ALLOW_XT)
722 || !check_input_specifier (&new->f, 1))
727 lex_force_match (')');
732 destroy_fmt_list (head, 0);
737 /* Parses a FORTRAN-like format specification into the linked
738 list with head FIRST and tail LAST. Returns nonzero if
741 fixed_parse_fortran (struct fixed_parsing_state *fx,
742 struct dls_var_spec **first, struct dls_var_spec **last)
744 struct fmt_list *list;
747 list = fixed_parse_fortran_internal (fx, first, last);
752 dump_fmt_list (fx, list, first, last, &name_idx);
753 destroy_fmt_list (list, 1);
754 if (name_idx < fx->name_cnt)
756 msg (SE, _("There aren't enough format specifications "
757 "to match the number of variable names given."));
764 /* Displays a table giving information on fixed-format variable
765 parsing on DATA LIST. */
766 /* FIXME: The `Columns' column should be divided into three columns,
767 one for the starting column, one for the dash, one for the ending
768 column; then right-justify the starting column and left-justify the
771 dump_fixed_table (const struct dls_var_spec *specs,
772 const struct file_handle *fh, int rec_cnt)
774 const struct dls_var_spec *spec;
778 for (i = 0, spec = specs; spec; spec = spec->next)
780 t = tab_create (4, i + 1, 0);
781 tab_columns (t, TAB_COL_DOWN, 1);
782 tab_headers (t, 0, 0, 1, 0);
783 tab_text (t, 0, 0, TAB_CENTER | TAT_TITLE, _("Variable"));
784 tab_text (t, 1, 0, TAB_CENTER | TAT_TITLE, _("Record"));
785 tab_text (t, 2, 0, TAB_CENTER | TAT_TITLE, _("Columns"));
786 tab_text (t, 3, 0, TAB_CENTER | TAT_TITLE, _("Format"));
787 tab_box (t, TAL_1, TAL_1, TAL_0, TAL_1, 0, 0, 3, i);
788 tab_hline (t, TAL_2, 0, 3, 1);
789 tab_dim (t, tab_natural_dimensions);
791 for (i = 1, spec = specs; spec; spec = spec->next, i++)
793 tab_text (t, 0, i, TAB_LEFT, spec->v->name);
794 tab_text (t, 1, i, TAT_PRINTF, "%d", spec->rec);
795 tab_text (t, 2, i, TAT_PRINTF, "%3d-%3d",
797 tab_text (t, 3, i, TAB_LEFT | TAB_FIX,
798 fmt_to_string (&spec->input));
801 tab_title (t, ngettext ("Reading %d record from %s.",
802 "Reading %d records from %s.", rec_cnt),
803 rec_cnt, fh_get_name (fh));
807 /* Free-format parsing. */
809 /* Parses variable specifications for DATA LIST FREE and adds
810 them to the linked list with head FIRST and tail LAST.
811 Returns nonzero only if successful. */
813 parse_free (struct dls_var_spec **first, struct dls_var_spec **last)
818 struct fmt_spec input, output;
824 if (!parse_DATA_LIST_vars (&name, &name_cnt, PV_NONE))
829 if (!parse_format_specifier (&input, 0)
830 || !check_input_specifier (&input, 1)
831 || !lex_force_match (')'))
833 for (i = 0; i < name_cnt; i++)
838 convert_fmt_ItoO (&input, &output);
843 input = make_input_format (FMT_F, 8, 0);
844 output = *get_format ();
847 if (input.type == FMT_A || input.type == FMT_AHEX)
851 for (i = 0; i < name_cnt; i++)
853 struct dls_var_spec *spec;
856 v = dict_create_var (default_dict, name[i], width);
860 msg (SE, _("%s is a duplicate variable name."), name[i]);
863 v->print = v->write = output;
865 if (!case_source_is_complex (vfm_source))
868 spec = xmalloc (sizeof *spec);
872 str_copy_trunc (spec->name, sizeof spec->name, v->name);
873 append_var_spec (first, last, spec);
875 for (i = 0; i < name_cnt; i++)
880 return lex_end_of_command () == CMD_SUCCESS;
883 /* Displays a table giving information on free-format variable parsing
886 dump_free_table (const struct data_list_pgm *dls,
887 const struct file_handle *fh)
893 struct dls_var_spec *spec;
894 for (i = 0, spec = dls->first; spec; spec = spec->next)
898 t = tab_create (2, i + 1, 0);
899 tab_columns (t, TAB_COL_DOWN, 1);
900 tab_headers (t, 0, 0, 1, 0);
901 tab_text (t, 0, 0, TAB_CENTER | TAT_TITLE, _("Variable"));
902 tab_text (t, 1, 0, TAB_CENTER | TAT_TITLE, _("Format"));
903 tab_box (t, TAL_1, TAL_1, TAL_0, TAL_1, 0, 0, 1, i);
904 tab_hline (t, TAL_2, 0, 1, 1);
905 tab_dim (t, tab_natural_dimensions);
908 struct dls_var_spec *spec;
910 for (i = 1, spec = dls->first; spec; spec = spec->next, i++)
912 tab_text (t, 0, i, TAB_LEFT, spec->v->name);
913 tab_text (t, 1, i, TAB_LEFT | TAB_FIX, fmt_to_string (&spec->input));
917 tab_title (t, _("Reading free-form data from %s."), fh_get_name (fh));
922 /* Input procedure. */
924 /* Extracts a field from the current position in the current
925 record. Fields can be unquoted or quoted with single- or
926 double-quote characters. *FIELD is set to the field content.
927 After parsing the field, sets the current position in the
928 record to just past the field and any trailing delimiter.
929 END_BLANK is used internally; it should be initialized by the
930 caller to 0 and left alone afterward. Returns 0 on failure or
931 a 1-based column number indicating the beginning of the field
934 cut_field (const struct data_list_pgm *dls, struct fixed_string *field,
937 struct fixed_string line;
941 if (dfm_eof (dls->reader))
943 if (dls->delim_cnt == 0)
944 dfm_expand_tabs (dls->reader);
945 dfm_get_record (dls->reader, &line);
947 cp = ls_c_str (&line);
948 if (dls->delim_cnt == 0)
950 /* Skip leading whitespace. */
951 while (cp < ls_end (&line) && isspace ((unsigned char) *cp))
953 if (cp >= ls_end (&line))
956 /* Handle actual data, whether quoted or unquoted. */
957 if (*cp == '\'' || *cp == '"')
961 field->string = ++cp;
962 while (cp < ls_end (&line) && *cp != quote)
964 field->length = cp - field->string;
965 if (cp < ls_end (&line))
968 msg (SW, _("Quoted string missing terminating `%c'."), quote);
973 while (cp < ls_end (&line)
974 && !isspace ((unsigned char) *cp) && *cp != ',')
976 field->length = cp - field->string;
979 /* Skip trailing whitespace and a single comma if present. */
980 while (cp < ls_end (&line) && isspace ((unsigned char) *cp))
982 if (cp < ls_end (&line) && *cp == ',')
987 if (cp >= ls_end (&line))
989 int column = dfm_column_start (dls->reader);
990 /* A blank line or a line that ends in \t has a
991 trailing blank field. */
992 if (column == 1 || (column > 1 && cp[-1] == '\t'))
997 field->string = ls_end (&line);
999 dfm_forward_record (dls->reader);
1014 while (cp < ls_end (&line)
1015 && memchr (dls->delims, *cp, dls->delim_cnt) == NULL)
1017 field->length = cp - field->string;
1018 if (cp < ls_end (&line))
1023 dfm_forward_columns (dls->reader, field->string - line.string);
1024 column_start = dfm_column_start (dls->reader);
1026 dfm_forward_columns (dls->reader, cp - field->string);
1028 return column_start;
1031 static bool read_from_data_list_fixed (const struct data_list_pgm *,
1033 static bool read_from_data_list_free (const struct data_list_pgm *,
1035 static bool read_from_data_list_list (const struct data_list_pgm *,
1038 /* Reads a case from DLS into C.
1039 Returns true if successful, false at end of file or on I/O error. */
1041 read_from_data_list (const struct data_list_pgm *dls, struct ccase *c)
1045 dfm_push (dls->reader);
1049 retval = read_from_data_list_fixed (dls, c);
1052 retval = read_from_data_list_free (dls, c);
1055 retval = read_from_data_list_list (dls, c);
1060 dfm_pop (dls->reader);
1065 /* Reads a case from the data file into C, parsing it according
1066 to fixed-format syntax rules in DLS.
1067 Returns true if successful, false at end of file or on I/O error. */
1069 read_from_data_list_fixed (const struct data_list_pgm *dls, struct ccase *c)
1071 struct dls_var_spec *var_spec = dls->first;
1074 if (dfm_eof (dls->reader))
1076 for (i = 1; i <= dls->rec_cnt; i++)
1078 struct fixed_string line;
1080 if (dfm_eof (dls->reader))
1082 /* Note that this can't occur on the first record. */
1083 msg (SW, _("Partial case of %d of %d records discarded."),
1084 i - 1, dls->rec_cnt);
1087 dfm_expand_tabs (dls->reader);
1088 dfm_get_record (dls->reader, &line);
1090 for (; var_spec && i == var_spec->rec; var_spec = var_spec->next)
1094 data_in_finite_line (&di, ls_c_str (&line), ls_length (&line),
1095 var_spec->fc, var_spec->lc);
1096 di.v = case_data_rw (c, var_spec->fv);
1097 di.flags = DI_IMPLIED_DECIMALS;
1098 di.f1 = var_spec->fc;
1099 di.format = var_spec->input;
1104 dfm_forward_record (dls->reader);
1110 /* Reads a case from the data file into C, parsing it according
1111 to free-format syntax rules in DLS.
1112 Returns true if successful, false at end of file or on I/O error. */
1114 read_from_data_list_free (const struct data_list_pgm *dls, struct ccase *c)
1116 struct dls_var_spec *var_spec;
1119 for (var_spec = dls->first; var_spec; var_spec = var_spec->next)
1121 struct fixed_string field;
1124 /* Cut out a field and read in a new record if necessary. */
1127 column = cut_field (dls, &field, &end_blank);
1131 if (!dfm_eof (dls->reader))
1132 dfm_forward_record (dls->reader);
1133 if (dfm_eof (dls->reader))
1135 if (var_spec != dls->first)
1136 msg (SW, _("Partial case discarded. The first variable "
1137 "missing was %s."), var_spec->name);
1145 di.s = ls_c_str (&field);
1146 di.e = ls_end (&field);
1147 di.v = case_data_rw (c, var_spec->fv);
1150 di.format = var_spec->input;
1157 /* Reads a case from the data file and parses it according to
1158 list-format syntax rules.
1159 Returns true if successful, false at end of file or on I/O error. */
1161 read_from_data_list_list (const struct data_list_pgm *dls, struct ccase *c)
1163 struct dls_var_spec *var_spec;
1166 if (dfm_eof (dls->reader))
1169 for (var_spec = dls->first; var_spec; var_spec = var_spec->next)
1171 struct fixed_string field;
1174 /* Cut out a field and check for end-of-line. */
1175 column = cut_field (dls, &field, &end_blank);
1178 if (get_undefined ())
1179 msg (SW, _("Missing value(s) for all variables from %s onward. "
1180 "These will be filled with the system-missing value "
1181 "or blanks, as appropriate."),
1183 for (; var_spec; var_spec = var_spec->next)
1185 int width = get_format_var_width (&var_spec->input);
1187 case_data_rw (c, var_spec->fv)->f = SYSMIS;
1189 memset (case_data_rw (c, var_spec->fv)->s, ' ', width);
1197 di.s = ls_c_str (&field);
1198 di.e = ls_end (&field);
1199 di.v = case_data_rw (c, var_spec->fv);
1202 di.format = var_spec->input;
1207 dfm_forward_record (dls->reader);
1211 /* Destroys SPEC. */
1213 destroy_dls_var_spec (struct dls_var_spec *spec)
1215 struct dls_var_spec *next;
1217 while (spec != NULL)
1225 /* Destroys DATA LIST transformation DLS.
1226 Returns true if successful, false if an I/O error occurred. */
1228 data_list_trns_free (void *dls_)
1230 struct data_list_pgm *dls = dls_;
1232 destroy_dls_var_spec (dls->first);
1233 dfm_close_reader (dls->reader);
1238 /* Handle DATA LIST transformation DLS, parsing data into C. */
1240 data_list_trns_proc (void *dls_, struct ccase *c, int case_num UNUSED)
1242 struct data_list_pgm *dls = dls_;
1245 if (read_from_data_list (dls, c))
1246 retval = TRNS_CONTINUE;
1247 else if (dfm_reader_error (dls->reader) || dfm_eof (dls->reader) > 1)
1249 /* An I/O error, or encountering end of file for a second
1250 time, should be escalated into a more serious error. */
1251 retval = TRNS_ERROR;
1254 retval = TRNS_DROP_CASE;
1256 /* If there was an END subcommand handle it. */
1257 if (dls->end != NULL)
1259 double *end = &case_data_rw (c, dls->end->fv)->f;
1260 if (retval == TRNS_DROP_CASE)
1263 retval = TRNS_CONTINUE;
1272 /* Reads all the records from the data file and passes them to
1274 Returns true if successful, false if an I/O error occurred. */
1276 data_list_source_read (struct case_source *source,
1278 write_case_func *write_case, write_case_data wc_data)
1280 struct data_list_pgm *dls = source->aux;
1286 if (!read_from_data_list (dls, c))
1287 return !dfm_reader_error (dls->reader);
1289 dfm_push (dls->reader);
1290 ok = write_case (wc_data);
1291 dfm_pop (dls->reader);
1297 /* Destroys the source's internal data. */
1299 data_list_source_destroy (struct case_source *source)
1301 data_list_trns_free (source->aux);
1304 static const struct case_source_class data_list_source_class =
1308 data_list_source_read,
1309 data_list_source_destroy,
1312 /* REPEATING DATA. */
1314 /* Represents a number or a variable. */
1315 struct rpd_num_or_var
1317 int num; /* Value, or 0. */
1318 struct variable *var; /* Variable, if number==0. */
1321 /* REPEATING DATA private data structure. */
1322 struct repeating_data_trns
1324 struct dls_var_spec *first, *last; /* Variable parsing specifications. */
1325 struct dfm_reader *reader; /* Input file, never NULL. */
1327 struct rpd_num_or_var starts_beg; /* STARTS=, before the dash. */
1328 struct rpd_num_or_var starts_end; /* STARTS=, after the dash. */
1329 struct rpd_num_or_var occurs; /* OCCURS= subcommand. */
1330 struct rpd_num_or_var length; /* LENGTH= subcommand. */
1331 struct rpd_num_or_var cont_beg; /* CONTINUED=, before the dash. */
1332 struct rpd_num_or_var cont_end; /* CONTINUED=, after the dash. */
1334 /* ID subcommand. */
1335 int id_beg, id_end; /* Beginning & end columns. */
1336 struct variable *id_var; /* DATA LIST variable. */
1337 struct fmt_spec id_spec; /* Input format spec. */
1338 union value *id_value; /* ID value. */
1340 write_case_func *write_case;
1341 write_case_data wc_data;
1344 static trns_free_func repeating_data_trns_free;
1345 static int parse_num_or_var (struct rpd_num_or_var *, const char *);
1346 static int parse_repeating_data (struct dls_var_spec **,
1347 struct dls_var_spec **);
1348 static void find_variable_input_spec (struct variable *v,
1349 struct fmt_spec *spec);
1351 /* Parses the REPEATING DATA command. */
1353 cmd_repeating_data (void)
1355 struct repeating_data_trns *rpd;
1356 int table = 1; /* Print table? */
1357 bool saw_starts = false; /* Saw STARTS subcommand? */
1358 bool saw_occurs = false; /* Saw OCCURS subcommand? */
1359 bool saw_length = false; /* Saw LENGTH subcommand? */
1360 bool saw_continued = false; /* Saw CONTINUED subcommand? */
1361 bool saw_id = false; /* Saw ID subcommand? */
1362 struct file_handle *const fh = fh_get_default_handle ();
1364 assert (case_source_is_complex (vfm_source));
1366 rpd = xmalloc (sizeof *rpd);
1367 rpd->reader = dfm_open_reader (fh);
1368 rpd->first = rpd->last = NULL;
1369 rpd->starts_beg.num = 0;
1370 rpd->starts_beg.var = NULL;
1371 rpd->starts_end = rpd->occurs = rpd->length = rpd->cont_beg
1372 = rpd->cont_end = rpd->starts_beg;
1373 rpd->id_beg = rpd->id_end = 0;
1375 rpd->id_value = NULL;
1381 if (lex_match_id ("FILE"))
1383 struct file_handle *file;
1385 file = fh_parse (FH_REF_FILE | FH_REF_INLINE);
1390 msg (SE, _("REPEATING DATA must use the same file as its "
1391 "corresponding DATA LIST or FILE TYPE."));
1395 else if (lex_match_id ("STARTS"))
1400 msg (SE, _("%s subcommand given multiple times."),"STARTS");
1405 if (!parse_num_or_var (&rpd->starts_beg, "STARTS beginning column"))
1408 lex_negative_to_dash ();
1409 if (lex_match ('-'))
1411 if (!parse_num_or_var (&rpd->starts_end, "STARTS ending column"))
1414 /* Otherwise, rpd->starts_end is uninitialized. We
1415 will initialize it later from the record length
1416 of the file. We can't do so now because the
1417 file handle may not be specified yet. */
1420 if (rpd->starts_beg.num != 0 && rpd->starts_end.num != 0
1421 && rpd->starts_beg.num > rpd->starts_end.num)
1423 msg (SE, _("STARTS beginning column (%d) exceeds "
1424 "STARTS ending column (%d)."),
1425 rpd->starts_beg.num, rpd->starts_end.num);
1429 else if (lex_match_id ("OCCURS"))
1434 msg (SE, _("%s subcommand given multiple times."),"OCCURS");
1439 if (!parse_num_or_var (&rpd->occurs, "OCCURS"))
1442 else if (lex_match_id ("LENGTH"))
1447 msg (SE, _("%s subcommand given multiple times."),"LENGTH");
1452 if (!parse_num_or_var (&rpd->length, "LENGTH"))
1455 else if (lex_match_id ("CONTINUED"))
1460 msg (SE, _("%s subcommand given multiple times."),"CONTINUED");
1463 saw_continued = true;
1465 if (!lex_match ('/'))
1467 if (!parse_num_or_var (&rpd->cont_beg,
1468 "CONTINUED beginning column"))
1471 lex_negative_to_dash ();
1473 && !parse_num_or_var (&rpd->cont_end,
1474 "CONTINUED ending column"))
1477 if (rpd->cont_beg.num != 0 && rpd->cont_end.num != 0
1478 && rpd->cont_beg.num > rpd->cont_end.num)
1480 msg (SE, _("CONTINUED beginning column (%d) exceeds "
1481 "CONTINUED ending column (%d)."),
1482 rpd->cont_beg.num, rpd->cont_end.num);
1487 rpd->cont_beg.num = 1;
1489 else if (lex_match_id ("ID"))
1494 msg (SE, _("%s subcommand given multiple times."),"ID");
1499 if (!lex_force_int ())
1501 if (lex_integer () < 1)
1503 msg (SE, _("ID beginning column (%ld) must be positive."),
1507 rpd->id_beg = lex_integer ();
1510 lex_negative_to_dash ();
1512 if (lex_match ('-'))
1514 if (!lex_force_int ())
1516 if (lex_integer () < 1)
1518 msg (SE, _("ID ending column (%ld) must be positive."),
1522 if (lex_integer () < rpd->id_end)
1524 msg (SE, _("ID ending column (%ld) cannot be less than "
1525 "ID beginning column (%d)."),
1526 lex_integer (), rpd->id_beg);
1530 rpd->id_end = lex_integer ();
1533 else rpd->id_end = rpd->id_beg;
1535 if (!lex_force_match ('='))
1537 rpd->id_var = parse_variable ();
1538 if (rpd->id_var == NULL)
1541 find_variable_input_spec (rpd->id_var, &rpd->id_spec);
1542 rpd->id_value = xnmalloc (rpd->id_var->nv, sizeof *rpd->id_value);
1544 else if (lex_match_id ("TABLE"))
1546 else if (lex_match_id ("NOTABLE"))
1548 else if (lex_match_id ("DATA"))
1556 if (!lex_force_match ('/'))
1560 /* Comes here when DATA specification encountered. */
1561 if (!saw_starts || !saw_occurs)
1564 msg (SE, _("Missing required specification STARTS."));
1566 msg (SE, _("Missing required specification OCCURS."));
1570 /* Enforce ID restriction. */
1571 if (saw_id && !saw_continued)
1573 msg (SE, _("ID specified without CONTINUED."));
1577 /* Calculate and check starts_end, cont_end if necessary. */
1578 if (rpd->starts_end.num == 0 && rpd->starts_end.var == NULL)
1580 rpd->starts_end.num = fh_get_record_width (fh);
1581 if (rpd->starts_beg.num != 0
1582 && rpd->starts_beg.num > rpd->starts_end.num)
1584 msg (SE, _("STARTS beginning column (%d) exceeds "
1585 "default STARTS ending column taken from file's "
1586 "record width (%d)."),
1587 rpd->starts_beg.num, rpd->starts_end.num);
1591 if (rpd->cont_end.num == 0 && rpd->cont_end.var == NULL)
1593 rpd->cont_end.num = fh_get_record_width (fh);
1594 if (rpd->cont_beg.num != 0
1595 && rpd->cont_beg.num > rpd->cont_end.num)
1597 msg (SE, _("CONTINUED beginning column (%d) exceeds "
1598 "default CONTINUED ending column taken from file's "
1599 "record width (%d)."),
1600 rpd->cont_beg.num, rpd->cont_end.num);
1606 if (!parse_repeating_data (&rpd->first, &rpd->last))
1609 /* Calculate length if necessary. */
1612 struct dls_var_spec *iter;
1614 for (iter = rpd->first; iter; iter = iter->next)
1615 if (iter->lc > rpd->length.num)
1616 rpd->length.num = iter->lc;
1617 assert (rpd->length.num != 0);
1621 dump_fixed_table (rpd->first, fh, rpd->last->rec);
1623 add_transformation (repeating_data_trns_proc, repeating_data_trns_free, rpd);
1625 return lex_end_of_command ();
1628 repeating_data_trns_free (rpd);
1629 return CMD_CASCADING_FAILURE;
1632 /* Finds the input format specification for variable V and puts
1633 it in SPEC. Because of the way that DATA LIST is structured,
1634 this is nontrivial. */
1636 find_variable_input_spec (struct variable *v, struct fmt_spec *spec)
1640 for (i = 0; i < n_trns; i++)
1642 struct transformation *trns = &t_trns[i];
1644 if (trns->proc == data_list_trns_proc)
1646 struct data_list_pgm *pgm = trns->private;
1647 struct dls_var_spec *iter;
1649 for (iter = pgm->first; iter; iter = iter->next)
1652 *spec = iter->input;
1661 /* Parses a number or a variable name from the syntax file and puts
1662 the results in VALUE. Ensures that the number is at least 1; else
1663 emits an error based on MESSAGE. Returns nonzero only if
1666 parse_num_or_var (struct rpd_num_or_var *value, const char *message)
1671 value->var = parse_variable ();
1672 if (value->var == NULL)
1674 if (value->var->type == ALPHA)
1676 msg (SE, _("String variable not allowed here."));
1680 else if (lex_is_integer ())
1682 value->num = lex_integer ();
1686 msg (SE, _("%s (%d) must be at least 1."), message, value->num);
1692 msg (SE, _("Variable or integer expected for %s."), message);
1698 /* Parses data specifications for repeating data groups, adding
1699 them to the linked list with head FIRST and tail LAST.
1700 Returns nonzero only if successful. */
1702 parse_repeating_data (struct dls_var_spec **first, struct dls_var_spec **last)
1704 struct fixed_parsing_state fx;
1710 while (token != '.')
1712 if (!parse_DATA_LIST_vars (&fx.name, &fx.name_cnt, PV_NONE))
1715 if (lex_is_number ())
1717 if (!fixed_parse_compatible (&fx, first, last))
1720 else if (token == '(')
1722 if (!fixed_parse_fortran (&fx, first, last))
1727 msg (SE, _("SPSS-like or FORTRAN-like format "
1728 "specification expected after variable names."));
1732 for (i = 0; i < fx.name_cnt; i++)
1740 for (i = 0; i < fx.name_cnt; i++)
1746 /* Obtains the real value for rpd_num_or_var N in case C and returns
1747 it. The valid range is nonnegative numbers, but numbers outside
1748 this range can be returned and should be handled by the caller as
1751 realize_value (struct rpd_num_or_var *n, struct ccase *c)
1755 double v = case_num (c, n->var->fv);
1756 return v != SYSMIS && v >= INT_MIN && v <= INT_MAX ? v : -1;
1762 /* Parameter record passed to rpd_parse_record(). */
1763 struct rpd_parse_info
1765 struct repeating_data_trns *trns; /* REPEATING DATA transformation. */
1766 const char *line; /* Line being parsed. */
1767 size_t len; /* Line length. */
1768 int beg, end; /* First and last column of first occurrence. */
1769 int ofs; /* Column offset between repeated occurrences. */
1770 struct ccase *c; /* Case to fill in. */
1771 int verify_id; /* Zero to initialize ID, nonzero to verify it. */
1772 int max_occurs; /* Max number of occurrences to parse. */
1775 /* Parses one record of repeated data and outputs corresponding
1776 cases. Returns number of occurrences parsed up to the
1777 maximum specified in INFO. */
1779 rpd_parse_record (const struct rpd_parse_info *info)
1781 struct repeating_data_trns *t = info->trns;
1782 int cur = info->beg;
1785 /* Handle record ID values. */
1788 union value id_temp[MAX_ELEMS_PER_VALUE];
1790 /* Parse record ID into V. */
1794 data_in_finite_line (&di, info->line, info->len, t->id_beg, t->id_end);
1795 di.v = info->verify_id ? id_temp : t->id_value;
1798 di.format = t->id_spec;
1805 && compare_values (id_temp, t->id_value, t->id_var->width) != 0)
1807 char expected_str [MAX_FORMATTED_LEN + 1];
1808 char actual_str [MAX_FORMATTED_LEN + 1];
1810 data_out (expected_str, &t->id_var->print, t->id_value);
1811 expected_str[t->id_var->print.w] = '\0';
1813 data_out (actual_str, &t->id_var->print, id_temp);
1814 actual_str[t->id_var->print.w] = '\0';
1817 _("Encountered mismatched record ID \"%s\" expecting \"%s\"."),
1818 actual_str, expected_str);
1824 /* Iterate over the set of expected occurrences and record each of
1825 them as a separate case. FIXME: We need to execute any
1826 transformations that follow the current one. */
1830 for (occurrences = 0; occurrences < info->max_occurs; )
1832 if (cur + info->ofs > info->end + 1)
1837 struct dls_var_spec *var_spec = t->first;
1839 for (; var_spec; var_spec = var_spec->next)
1841 int fc = var_spec->fc - 1 + cur;
1842 int lc = var_spec->lc - 1 + cur;
1844 if (fc > info->len && !warned && var_spec->input.type != FMT_A)
1849 _("Variable %s starting in column %d extends "
1850 "beyond physical record length of %d."),
1851 var_spec->v->name, fc, info->len);
1857 data_in_finite_line (&di, info->line, info->len, fc, lc);
1858 di.v = case_data_rw (info->c, var_spec->fv);
1861 di.format = var_spec->input;
1871 if (!t->write_case (t->wc_data))
1879 /* Reads one set of repetitions of the elements in the REPEATING
1880 DATA structure. Returns TRNS_CONTINUE on success,
1881 TRNS_DROP_CASE on end of file or on failure, or TRNS_NEXT_CASE. */
1883 repeating_data_trns_proc (void *trns_, struct ccase *c, int case_num UNUSED)
1885 struct repeating_data_trns *t = trns_;
1887 struct fixed_string line; /* Current record. */
1889 int starts_beg; /* Starting column. */
1890 int starts_end; /* Ending column. */
1891 int occurs; /* Number of repetitions. */
1892 int length; /* Length of each occurrence. */
1893 int cont_beg; /* Starting column for continuation lines. */
1894 int cont_end; /* Ending column for continuation lines. */
1896 int occurs_left; /* Number of occurrences remaining. */
1898 int code; /* Return value from rpd_parse_record(). */
1900 int skip_first_record = 0;
1902 dfm_push (t->reader);
1904 /* Read the current record. */
1905 dfm_reread_record (t->reader, 1);
1906 dfm_expand_tabs (t->reader);
1907 if (dfm_eof (t->reader))
1908 return TRNS_DROP_CASE;
1909 dfm_get_record (t->reader, &line);
1910 dfm_forward_record (t->reader);
1912 /* Calculate occurs, length. */
1913 occurs_left = occurs = realize_value (&t->occurs, c);
1916 tmsg (SE, RPD_ERR, _("Invalid value %d for OCCURS."), occurs);
1917 return TRNS_NEXT_CASE;
1919 starts_beg = realize_value (&t->starts_beg, c);
1920 if (starts_beg <= 0)
1922 tmsg (SE, RPD_ERR, _("Beginning column for STARTS (%d) must be "
1925 return TRNS_NEXT_CASE;
1927 starts_end = realize_value (&t->starts_end, c);
1928 if (starts_end < starts_beg)
1930 tmsg (SE, RPD_ERR, _("Ending column for STARTS (%d) is less than "
1931 "beginning column (%d)."),
1932 starts_end, starts_beg);
1933 skip_first_record = 1;
1935 length = realize_value (&t->length, c);
1938 tmsg (SE, RPD_ERR, _("Invalid value %d for LENGTH."), length);
1940 occurs = occurs_left = 1;
1942 cont_beg = realize_value (&t->cont_beg, c);
1945 tmsg (SE, RPD_ERR, _("Beginning column for CONTINUED (%d) must be "
1948 return TRNS_DROP_CASE;
1950 cont_end = realize_value (&t->cont_end, c);
1951 if (cont_end < cont_beg)
1953 tmsg (SE, RPD_ERR, _("Ending column for CONTINUED (%d) is less than "
1954 "beginning column (%d)."),
1955 cont_end, cont_beg);
1956 return TRNS_DROP_CASE;
1959 /* Parse the first record. */
1960 if (!skip_first_record)
1962 struct rpd_parse_info info;
1964 info.line = ls_c_str (&line);
1965 info.len = ls_length (&line);
1966 info.beg = starts_beg;
1967 info.end = starts_end;
1971 info.max_occurs = occurs_left;
1972 code = rpd_parse_record (&info);
1974 return TRNS_DROP_CASE;
1975 occurs_left -= code;
1977 else if (cont_beg == 0)
1978 return TRNS_NEXT_CASE;
1980 /* Make sure, if some occurrences are left, that we have
1981 continuation records. */
1982 if (occurs_left > 0 && cont_beg == 0)
1985 _("Number of repetitions specified on OCCURS (%d) "
1986 "exceed number of repetitions available in "
1987 "space on STARTS (%d), and CONTINUED not specified."),
1988 occurs, (starts_end - starts_beg + 1) / length);
1989 return TRNS_DROP_CASE;
1992 /* Go on to additional records. */
1993 while (occurs_left != 0)
1995 struct rpd_parse_info info;
1997 assert (occurs_left >= 0);
1999 /* Read in another record. */
2000 if (dfm_eof (t->reader))
2003 _("Unexpected end of file with %d repetitions "
2004 "remaining out of %d."),
2005 occurs_left, occurs);
2006 return TRNS_DROP_CASE;
2008 dfm_expand_tabs (t->reader);
2009 dfm_get_record (t->reader, &line);
2010 dfm_forward_record (t->reader);
2012 /* Parse this record. */
2014 info.line = ls_c_str (&line);
2015 info.len = ls_length (&line);
2016 info.beg = cont_beg;
2017 info.end = cont_end;
2021 info.max_occurs = occurs_left;
2022 code = rpd_parse_record (&info);;
2024 return TRNS_DROP_CASE;
2025 occurs_left -= code;
2028 dfm_pop (t->reader);
2030 /* FIXME: This is a kluge until we've implemented multiplexing of
2032 return TRNS_NEXT_CASE;
2035 /* Frees a REPEATING DATA transformation.
2036 Returns true if successful, false if an I/O error occurred. */
2038 repeating_data_trns_free (void *rpd_)
2040 struct repeating_data_trns *rpd = rpd_;
2042 destroy_dls_var_spec (rpd->first);
2043 dfm_close_reader (rpd->reader);
2044 free (rpd->id_value);
2049 /* Lets repeating_data_trns_proc() know how to write the cases
2050 that it composes. Not elegant. */
2052 repeating_data_set_write_case (struct transformation *trns_,
2053 write_case_func *write_case,
2054 write_case_data wc_data)
2056 struct repeating_data_trns *t = trns_->private;
2058 assert (trns_->proc == repeating_data_trns_proc);
2059 t->write_case = write_case;
2060 t->wc_data = wc_data;