1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 1997-9, 2000, 2006, 2007 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/>. */
19 #include "sys-file-writer.h"
20 #include "sys-file-private.h"
29 #include <libpspp/float-format.h>
30 #include <libpspp/integer-format.h>
31 #include <libpspp/message.h>
32 #include <libpspp/misc.h>
33 #include <libpspp/str.h>
34 #include <libpspp/version.h>
36 #include <data/case.h>
37 #include <data/casewriter-provider.h>
38 #include <data/casewriter.h>
39 #include <data/dictionary.h>
40 #include <data/file-handle-def.h>
41 #include <data/file-name.h>
42 #include <data/format.h>
43 #include <data/make-file.h>
44 #include <data/missing-values.h>
45 #include <data/settings.h>
46 #include <data/short-names.h>
47 #include <data/value-labels.h>
48 #include <data/variable.h>
51 #include "unlocked-io.h"
55 #define _(msgid) gettext (msgid)
56 #define N_(msgid) (msgid)
58 /* Compression bias used by PSPP. Values between (1 -
59 COMPRESSION_BIAS) and (251 - COMPRESSION_BIAS) inclusive can be
61 #define COMPRESSION_BIAS 100
63 /* System file writer. */
66 struct file_handle *fh; /* File handle. */
67 struct fh_lock *lock; /* Mutual exclusion for file. */
68 FILE *file; /* File stream. */
69 struct replace_file *rf; /* Ticket for replacing output file. */
71 bool compress; /* 1=compressed, 0=not compressed. */
72 casenumber case_cnt; /* Number of cases written so far. */
74 /* Compression buffering.
76 Compressed data is output as groups of 8 1-byte opcodes
77 followed by up to 8 (depending on the opcodes) 8-byte data
78 items. Data items and opcodes arrive at the same time but
79 must be reordered for writing to disk, thus a small amount
81 uint8_t opcodes[8]; /* Buffered opcodes. */
82 int opcode_cnt; /* Number of buffered opcodes. */
83 uint8_t data[8][8]; /* Buffered data. */
84 int data_cnt; /* Number of buffered data items. */
87 struct sfm_var *sfm_vars; /* Variables. */
88 size_t sfm_var_cnt; /* Number of variables. */
89 size_t segment_cnt; /* Number of variables including extra segments
90 for long string variables. */
93 static const struct casewriter_class sys_file_casewriter_class;
95 static void write_header (struct sfm_writer *, const struct dictionary *);
96 static void write_variable (struct sfm_writer *, const struct variable *);
97 static void write_value_labels (struct sfm_writer *,
98 struct variable *, int idx);
99 static void write_integer_info_record (struct sfm_writer *);
100 static void write_float_info_record (struct sfm_writer *);
102 static void write_longvar_table (struct sfm_writer *w,
103 const struct dictionary *dict);
105 static void write_vls_length_table (struct sfm_writer *w,
106 const struct dictionary *dict);
109 static void write_variable_display_parameters (struct sfm_writer *w,
110 const struct dictionary *dict);
112 static void write_documents (struct sfm_writer *, const struct dictionary *);
114 static void write_int (struct sfm_writer *, int32_t);
115 static inline void convert_double_to_output_format (double, uint8_t[8]);
116 static void write_float (struct sfm_writer *, double);
117 static void write_string (struct sfm_writer *, const char *, size_t);
118 static void write_bytes (struct sfm_writer *, const void *, size_t);
119 static void write_zeros (struct sfm_writer *, size_t);
120 static void write_spaces (struct sfm_writer *, size_t);
121 static void write_value (struct sfm_writer *, const union value *, int width);
123 static void write_case_uncompressed (struct sfm_writer *, struct ccase *);
124 static void write_case_compressed (struct sfm_writer *, struct ccase *);
125 static void flush_compressed (struct sfm_writer *);
126 static void put_cmp_opcode (struct sfm_writer *, uint8_t);
127 static void put_cmp_number (struct sfm_writer *, double);
128 static void put_cmp_string (struct sfm_writer *, const void *, size_t);
130 bool write_error (const struct sfm_writer *);
131 bool close_writer (struct sfm_writer *);
133 /* Returns default options for writing a system file. */
134 struct sfm_write_options
135 sfm_writer_default_options (void)
137 struct sfm_write_options opts;
138 opts.create_writeable = true;
139 opts.compress = settings_get_scompression ();
144 /* Opens the system file designated by file handle FH for writing
145 cases from dictionary D according to the given OPTS. If
146 COMPRESS is nonzero, the system file will be compressed.
148 No reference to D is retained, so it may be modified or
149 destroyed at will after this function returns. D is not
150 modified by this function, except to assign short names. */
152 sfm_open_writer (struct file_handle *fh, struct dictionary *d,
153 struct sfm_write_options opts)
155 struct sfm_writer *w;
161 if (opts.version != 2 && opts.version != 3)
163 msg (ME, _("Unknown system file version %d. Treating as version %d."),
168 /* Create and initialize writer. */
169 w = xmalloc (sizeof *w);
175 w->compress = opts.compress;
178 w->opcode_cnt = w->data_cnt = 0;
180 /* Figure out how to map in-memory case data to on-disk case
181 data. Also count the number of segments. Very long strings
182 occupy multiple segments, otherwise each variable only takes
184 w->segment_cnt = sfm_dictionary_to_sfm_vars (d, &w->sfm_vars,
187 /* Open file handle as an exclusive writer. */
188 /* TRANSLATORS: this fragment will be interpolated into
189 messages in fh_lock() that identify types of files. */
190 w->lock = fh_lock (fh, FH_REF_FILE, N_("system file"), FH_ACC_WRITE, true);
194 /* Create the file on disk. */
195 mode = S_IRUSR | S_IRGRP | S_IROTH;
196 if (opts.create_writeable)
197 mode |= S_IWUSR | S_IWGRP | S_IWOTH;
198 w->rf = replace_file_start (fh_get_file_name (fh), "wb", mode,
202 msg (ME, _("Error opening \"%s\" for writing as a system file: %s."),
203 fh_get_file_name (fh), strerror (errno));
207 /* Write the file header. */
210 /* Write basic variable info. */
211 short_names_assign (d);
212 for (i = 0; i < dict_get_var_cnt (d); i++)
213 write_variable (w, dict_get_var (d, i));
215 /* Write out value labels. */
217 for (i = 0; i < dict_get_var_cnt (d); i++)
219 struct variable *v = dict_get_var (d, i);
221 write_value_labels (w, v, idx);
222 idx += sfm_width_to_octs (var_get_width (v));
225 if (dict_get_documents (d) != NULL)
226 write_documents (w, d);
228 write_integer_info_record (w);
229 write_float_info_record (w);
231 write_variable_display_parameters (w, d);
233 if (opts.version >= 3)
234 write_longvar_table (w, d);
236 write_vls_length_table (w, d);
238 /* Write end-of-headers record. */
248 return casewriter_create (dict_get_next_value_idx (d),
249 &sys_file_casewriter_class, w);
256 /* Returns value of X truncated to two least-significant digits. */
267 /* Calculates the offset of data for TARGET_VAR from the
268 beginning of each case's data for dictionary D. The return
269 value is in "octs" (8-byte units). */
271 calc_oct_idx (const struct dictionary *d, struct variable *target_var)
277 for (i = 0; i < dict_get_var_cnt (d); i++)
279 struct variable *var = dict_get_var (d, i);
280 if (var == target_var)
282 oct_idx += sfm_width_to_octs (var_get_width (var));
287 /* Write the sysfile_header header to system file W. */
289 write_header (struct sfm_writer *w, const struct dictionary *d)
292 char creation_date[10];
293 char creation_time[9];
294 const char *file_label;
295 struct variable *weight;
299 /* Record-type code. */
300 write_string (w, "$FL2", 4);
302 /* Product identification. */
303 snprintf (prod_name, sizeof prod_name, "@(#) SPSS DATA FILE %s - %s",
304 version, host_system);
305 write_string (w, prod_name, 60);
310 /* Number of `union value's per case. */
311 write_int (w, calc_oct_idx (d, NULL));
314 write_int (w, w->compress);
316 /* Weight variable. */
317 weight = dict_get_weight (d);
318 write_int (w, weight != NULL ? calc_oct_idx (d, weight) + 1 : 0);
320 /* Number of cases. We don't know this in advance, so we write
321 -1 to indicate an unknown number of cases. Later we can
322 come back and overwrite it with the true value. */
325 /* Compression bias. */
326 write_float (w, COMPRESSION_BIAS);
328 /* Creation date and time. */
329 if (time (&t) == (time_t) -1)
331 strcpy (creation_date, "01 Jan 70");
332 strcpy (creation_time, "00:00:00");
336 static const char *const month_name[12] =
338 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
339 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
341 struct tm *tmp = localtime (&t);
342 int day = rerange (tmp->tm_mday);
343 int mon = rerange (tmp->tm_mon + 1);
344 int year = rerange (tmp->tm_year);
345 int hour = rerange (tmp->tm_hour + 1);
346 int min = rerange (tmp->tm_min + 1);
347 int sec = rerange (tmp->tm_sec + 1);
349 snprintf (creation_date, sizeof creation_date,
350 "%02d %s %02d", day, month_name[mon - 1], year);
351 snprintf (creation_time, sizeof creation_time,
352 "%02d:%02d:%02d", hour - 1, min - 1, sec - 1);
354 write_string (w, creation_date, 9);
355 write_string (w, creation_time, 8);
358 file_label = dict_get_label (d);
359 if (file_label == NULL)
361 write_string (w, file_label, 64);
367 /* Write format spec FMT to W, after adjusting it to be
368 compatible with the given WIDTH. */
370 write_format (struct sfm_writer *w, struct fmt_spec fmt, int width)
372 assert (fmt_check_output (&fmt));
373 assert (sfm_width_to_segments (width) == 1);
376 fmt_resize (&fmt, width);
377 write_int (w, (fmt_to_io (fmt.type) << 16) | (fmt.w << 8) | fmt.d);
380 /* Write a string continuation variable record for each 8-byte
381 section beyond the initial 8 bytes, for a variable of the
384 write_variable_continuation_records (struct sfm_writer *w, int width)
388 assert (sfm_width_to_segments (width) == 1);
389 for (position = 8; position < width; position += 8)
391 write_int (w, 2); /* Record type. */
392 write_int (w, -1); /* Width. */
393 write_int (w, 0); /* No variable label. */
394 write_int (w, 0); /* No missing values. */
395 write_int (w, 0); /* Print format. */
396 write_int (w, 0); /* Write format. */
397 write_zeros (w, 8); /* Name. */
401 /* Write the variable record(s) for variable V to system file
404 write_variable (struct sfm_writer *w, const struct variable *v)
406 int width = var_get_width (v);
407 int segment_cnt = sfm_width_to_segments (width);
408 int seg0_width = sfm_segment_alloc_width (width, 0);
409 const struct missing_values *mv = var_get_missing_values (v);
416 write_int (w, seg0_width);
418 /* Variable has a variable label? */
419 write_int (w, var_has_label (v));
421 /* Number of missing values. If there is a range, then the
422 range counts as 2 missing values and causes the number to be
424 write_int (w, mv_has_range (mv) ? -2 - mv_n_values (mv) : mv_n_values (mv));
426 /* Print and write formats. */
427 write_format (w, *var_get_print_format (v), seg0_width);
428 write_format (w, *var_get_write_format (v), seg0_width);
431 The full name is in a translation table written
433 write_string (w, var_get_short_name (v, 0), 8);
436 if (var_has_label (v))
438 const char *label = var_get_label (v);
439 size_t label_len = MIN (strlen (label), 255);
440 size_t padded_len = ROUND_UP (label_len, 4);
441 write_int (w, label_len);
442 write_string (w, label, padded_len);
445 /* Write the missing values, if any, range first. */
446 if (mv_has_range (mv))
449 mv_get_range (mv, &x, &y);
453 for (i = 0; i < mv_n_values (mv); i++)
456 mv_get_value (mv, &value, i);
457 write_value (w, &value, seg0_width);
460 write_variable_continuation_records (w, seg0_width);
462 /* Write additional segments for very long string variables. */
463 for (i = 1; i < segment_cnt; i++)
465 int seg_width = sfm_segment_alloc_width (width, i);
466 struct fmt_spec fmt = fmt_for_output (FMT_A, MAX (seg_width, 1), 0);
468 write_int (w, 2); /* Variable record. */
469 write_int (w, seg_width); /* Width. */
470 write_int (w, 0); /* No variable label. */
471 write_int (w, 0); /* No missing values. */
472 write_format (w, fmt, seg_width); /* Print format. */
473 write_format (w, fmt, seg_width); /* Write format. */
474 write_string (w, var_get_short_name (v, i), 8);
476 write_variable_continuation_records (w, seg_width);
480 /* Writes the value labels for variable V having system file
481 variable index IDX to system file W. */
483 write_value_labels (struct sfm_writer *w, struct variable *v, int idx)
485 const struct val_labs *val_labs;
486 struct val_labs_iterator *i;
489 val_labs = var_get_value_labels (v);
490 if (val_labs == NULL)
493 /* Value label record. */
494 write_int (w, 3); /* Record type. */
495 write_int (w, val_labs_count (val_labs));
496 for (vl = val_labs_first_sorted (val_labs, &i); vl != NULL;
497 vl = val_labs_next (val_labs, &i))
499 uint8_t len = MIN (strlen (vl->label), 255);
501 write_value (w, &vl->value, var_get_width (v));
502 write_bytes (w, &len, 1);
503 write_bytes (w, vl->label, len);
504 write_zeros (w, REM_RND_UP (len + 1, 8));
507 /* Value label variable record. */
508 write_int (w, 4); /* Record type. */
509 write_int (w, 1); /* Number of variables. */
510 write_int (w, idx + 1); /* Variable's dictionary index. */
513 /* Writes record type 6, document record. */
515 write_documents (struct sfm_writer *w, const struct dictionary *d)
517 size_t line_cnt = dict_get_document_line_cnt (d);
519 write_int (w, 6); /* Record type. */
520 write_int (w, line_cnt);
521 write_bytes (w, dict_get_documents (d), line_cnt * DOC_LINE_LENGTH);
524 /* Write the alignment, width and scale values. */
526 write_variable_display_parameters (struct sfm_writer *w,
527 const struct dictionary *dict)
531 write_int (w, 7); /* Record type. */
532 write_int (w, 11); /* Record subtype. */
533 write_int (w, 4); /* Data item (int32) size. */
534 write_int (w, w->segment_cnt * 3); /* Number of data items. */
536 for (i = 0; i < dict_get_var_cnt (dict); ++i)
538 struct variable *v = dict_get_var (dict, i);
539 int width = var_get_width (v);
540 int segment_cnt = sfm_width_to_segments (width);
541 int measure = (var_get_measure (v) == MEASURE_NOMINAL ? 1
542 : var_get_measure (v) == MEASURE_ORDINAL ? 2
544 int alignment = (var_get_alignment (v) == ALIGN_LEFT ? 0
545 : var_get_alignment (v) == ALIGN_RIGHT ? 1
549 for (i = 0; i < segment_cnt; i++)
551 int width_left = width - sfm_segment_effective_offset (width, i);
552 write_int (w, measure);
553 write_int (w, (i == 0 ? var_get_display_width (v)
554 : var_default_display_width (width_left)));
555 write_int (w, alignment);
560 /* Writes the table of lengths for very long string variables. */
562 write_vls_length_table (struct sfm_writer *w,
563 const struct dictionary *dict)
568 ds_init_empty (&map);
569 for (i = 0; i < dict_get_var_cnt (dict); ++i)
571 const struct variable *v = dict_get_var (dict, i);
572 if (sfm_width_to_segments (var_get_width (v)) > 1)
573 ds_put_format (&map, "%s=%05d%c\t",
574 var_get_short_name (v, 0), var_get_width (v), 0);
576 if (!ds_is_empty (&map))
578 write_int (w, 7); /* Record type. */
579 write_int (w, 14); /* Record subtype. */
580 write_int (w, 1); /* Data item (char) size. */
581 write_int (w, ds_length (&map)); /* Number of data items. */
582 write_bytes (w, ds_data (&map), ds_length (&map));
587 /* Writes the long variable name table. */
589 write_longvar_table (struct sfm_writer *w, const struct dictionary *dict)
594 ds_init_empty (&map);
595 for (i = 0; i < dict_get_var_cnt (dict); i++)
597 struct variable *v = dict_get_var (dict, i);
600 ds_put_char (&map, '\t');
601 ds_put_format (&map, "%s=%s",
602 var_get_short_name (v, 0), var_get_name (v));
605 write_int (w, 7); /* Record type. */
606 write_int (w, 13); /* Record subtype. */
607 write_int (w, 1); /* Data item (char) size. */
608 write_int (w, ds_length (&map)); /* Number of data items. */
609 write_bytes (w, ds_data (&map), ds_length (&map));
614 /* Write integer information record. */
616 write_integer_info_record (struct sfm_writer *w)
618 int version_component[3];
621 /* Parse the version string. */
622 memset (version_component, 0, sizeof version_component);
623 sscanf (bare_version, "%d.%d.%d",
624 &version_component[0], &version_component[1], &version_component[2]);
626 /* Figure out the floating-point format. */
627 if (FLOAT_NATIVE_64_BIT == FLOAT_IEEE_DOUBLE_LE
628 || FLOAT_NATIVE_64_BIT == FLOAT_IEEE_DOUBLE_BE)
630 else if (FLOAT_NATIVE_64_BIT == FLOAT_Z_LONG)
632 else if (FLOAT_NATIVE_64_BIT == FLOAT_VAX_D)
638 write_int (w, 7); /* Record type. */
639 write_int (w, 3); /* Record subtype. */
640 write_int (w, 4); /* Data item (int32) size. */
641 write_int (w, 8); /* Number of data items. */
642 write_int (w, version_component[0]);
643 write_int (w, version_component[1]);
644 write_int (w, version_component[2]);
645 write_int (w, -1); /* Machine code. */
646 write_int (w, float_format);
647 write_int (w, 1); /* Compression code. */
648 write_int (w, INTEGER_NATIVE == INTEGER_MSB_FIRST ? 1 : 2);
649 write_int (w, 2); /* 7-bit ASCII. */
652 /* Write floating-point information record. */
654 write_float_info_record (struct sfm_writer *w)
656 write_int (w, 7); /* Record type. */
657 write_int (w, 4); /* Record subtype. */
658 write_int (w, 8); /* Data item (flt64) size. */
659 write_int (w, 3); /* Number of data items. */
660 write_float (w, SYSMIS); /* System-missing value. */
661 write_float (w, HIGHEST); /* Value used for HIGHEST in missing values. */
662 write_float (w, LOWEST); /* Value used for LOWEST in missing values. */
665 /* Writes case C to system file W. */
667 sys_file_casewriter_write (struct casewriter *writer, void *w_,
670 struct sfm_writer *w = w_;
672 if (ferror (w->file))
674 casewriter_force_error (writer);
682 write_case_uncompressed (w, c);
684 write_case_compressed (w, c);
689 /* Destroys system file writer W. */
691 sys_file_casewriter_destroy (struct casewriter *writer, void *w_)
693 struct sfm_writer *w = w_;
694 if (!close_writer (w))
695 casewriter_force_error (writer);
698 /* Returns true if an I/O error has occurred on WRITER, false otherwise. */
700 write_error (const struct sfm_writer *writer)
702 return ferror (writer->file);
705 /* Closes a system file after we're done with it.
706 Returns true if successful, false if an I/O error occurred. */
708 close_writer (struct sfm_writer *w)
719 if (w->opcode_cnt > 0)
720 flush_compressed (w);
723 ok = !write_error (w);
725 /* Seek back to the beginning and update the number of cases.
726 This is just a courtesy to later readers, so there's no need
727 to check return values or report errors. */
728 if (ok && w->case_cnt <= INT32_MAX && !fseek (w->file, 80, SEEK_SET))
730 write_int (w, w->case_cnt);
734 if (fclose (w->file) == EOF)
738 msg (ME, _("An I/O error occurred writing system file \"%s\"."),
739 fh_get_file_name (w->fh));
741 if (ok ? !replace_file_commit (w->rf) : !replace_file_abort (w->rf))
754 /* System file writer casewriter class. */
755 static const struct casewriter_class sys_file_casewriter_class =
757 sys_file_casewriter_write,
758 sys_file_casewriter_destroy,
762 /* Writes case C to system file W, without compressing it. */
764 write_case_uncompressed (struct sfm_writer *w, struct ccase *c)
768 for (i = 0; i < w->sfm_var_cnt; i++)
770 struct sfm_var *v = &w->sfm_vars[i];
773 write_float (w, case_num_idx (c, v->case_index));
776 write_bytes (w, case_str_idx (c, v->case_index) + v->offset,
778 write_spaces (w, v->padding);
783 /* Writes case C to system file W, with compression. */
785 write_case_compressed (struct sfm_writer *w, struct ccase *c)
789 for (i = 0; i < w->sfm_var_cnt; i++)
791 struct sfm_var *v = &w->sfm_vars[i];
795 double d = case_num_idx (c, v->case_index);
797 put_cmp_opcode (w, 255);
798 else if (d >= 1 - COMPRESSION_BIAS
799 && d <= 251 - COMPRESSION_BIAS
801 put_cmp_opcode (w, (int) d + COMPRESSION_BIAS);
804 put_cmp_opcode (w, 253);
805 put_cmp_number (w, d);
810 int offset = v->offset;
813 /* This code properly deals with a width that is not a
814 multiple of 8, by ensuring that the final partial
815 oct (8 byte unit) is treated as padded with spaces
817 for (width = v->width; width > 0; width -= 8, offset += 8)
819 const void *data = case_str_idx (c, v->case_index) + offset;
820 int chunk_size = MIN (width, 8);
821 if (!memcmp (data, " ", chunk_size))
822 put_cmp_opcode (w, 254);
825 put_cmp_opcode (w, 253);
826 put_cmp_string (w, data, chunk_size);
830 /* This code deals properly with padding that is not a
831 multiple of 8 bytes, by discarding the remainder,
832 which was already effectively padded with spaces in
833 the previous loop. (Note that v->width + v->padding
834 is always a multiple of 8.) */
835 for (padding = v->padding / 8; padding > 0; padding--)
836 put_cmp_opcode (w, 254);
841 /* Flushes buffered compressed opcodes and data to W.
842 The compression buffer must not be empty. */
844 flush_compressed (struct sfm_writer *w)
846 assert (w->opcode_cnt > 0 && w->opcode_cnt <= 8);
848 write_bytes (w, w->opcodes, w->opcode_cnt);
849 write_zeros (w, 8 - w->opcode_cnt);
851 write_bytes (w, w->data, w->data_cnt * sizeof *w->data);
853 w->opcode_cnt = w->data_cnt = 0;
856 /* Appends OPCODE to the buffered set of compression opcodes in
857 W. Flushes the compression buffer beforehand if necessary. */
859 put_cmp_opcode (struct sfm_writer *w, uint8_t opcode)
861 if (w->opcode_cnt >= 8)
862 flush_compressed (w);
864 w->opcodes[w->opcode_cnt++] = opcode;
867 /* Appends NUMBER to the buffered compression data in W. The
868 buffer must not be full; the way to assure that is to call
869 this function only just after a call to put_cmp_opcode, which
870 will flush the buffer as necessary. */
872 put_cmp_number (struct sfm_writer *w, double number)
874 assert (w->opcode_cnt > 0);
875 assert (w->data_cnt < 8);
877 convert_double_to_output_format (number, w->data[w->data_cnt++]);
880 /* Appends SIZE bytes of DATA to the buffered compression data in
881 W, followed by enough spaces to pad the output data to exactly
882 8 bytes (thus, SIZE must be no greater than 8). The buffer
883 must not be full; the way to assure that is to call this
884 function only just after a call to put_cmp_opcode, which will
885 flush the buffer as necessary. */
887 put_cmp_string (struct sfm_writer *w, const void *data, size_t size)
889 assert (w->opcode_cnt > 0);
890 assert (w->data_cnt < 8);
893 memset (w->data[w->data_cnt], ' ', 8);
894 memcpy (w->data[w->data_cnt], data, size);
898 /* Writes 32-bit integer X to the output file for writer W. */
900 write_int (struct sfm_writer *w, int32_t x)
902 write_bytes (w, &x, sizeof x);
905 /* Converts NATIVE to the 64-bit format used in output files in
908 convert_double_to_output_format (double native, uint8_t output[8])
910 /* If "double" is not a 64-bit type, then convert it to a
911 64-bit type. Otherwise just copy it. */
912 if (FLOAT_NATIVE_DOUBLE != FLOAT_NATIVE_64_BIT)
913 float_convert (FLOAT_NATIVE_DOUBLE, &native, FLOAT_NATIVE_64_BIT, output);
915 memcpy (output, &native, sizeof native);
918 /* Writes floating-point number X to the output file for writer
921 write_float (struct sfm_writer *w, double x)
924 convert_double_to_output_format (x, output);
925 write_bytes (w, output, sizeof output);
928 /* Writes contents of VALUE with the given WIDTH to W, padding
929 with zeros to a multiple of 8 bytes.
930 To avoid a branch, and because we don't actually need to
931 support it, WIDTH must be no bigger than 8. */
933 write_value (struct sfm_writer *w, const union value *value, int width)
937 write_float (w, value->f);
940 write_bytes (w, value->s, width);
941 write_zeros (w, 8 - width);
945 /* Writes null-terminated STRING in a field of the given WIDTH to
946 W. If WIDTH is longer than WIDTH, it is truncated; if WIDTH
947 is narrowed, it is padded on the right with spaces. */
949 write_string (struct sfm_writer *w, const char *string, size_t width)
951 size_t data_bytes = MIN (strlen (string), width);
952 size_t pad_bytes = width - data_bytes;
953 write_bytes (w, string, data_bytes);
954 while (pad_bytes-- > 0)
958 /* Writes SIZE bytes of DATA to W's output file. */
960 write_bytes (struct sfm_writer *w, const void *data, size_t size)
962 fwrite (data, 1, size, w->file);
965 /* Writes N zeros to W's output file. */
967 write_zeros (struct sfm_writer *w, size_t n)
973 /* Writes N spaces to W's output file. */
975 write_spaces (struct sfm_writer *w, size_t n)