1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 1997-9, 2000, 2006, 2009, 2011, 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/>. */
19 #include "data/data-out.h"
29 #include "data/calendar.h"
30 #include "data/format.h"
31 #include "data/settings.h"
32 #include "data/value.h"
33 #include "libpspp/assertion.h"
34 #include "libpspp/cast.h"
35 #include "libpspp/float-format.h"
36 #include "libpspp/i18n.h"
37 #include "libpspp/integer-format.h"
38 #include "libpspp/message.h"
39 #include "libpspp/misc.h"
40 #include "libpspp/pool.h"
41 #include "libpspp/str.h"
43 #include "gl/minmax.h"
44 #include "gl/c-snprintf.h"
47 #define _(msgid) gettext (msgid)
49 /* A representation of a number that can be quickly rounded to
50 any desired number of decimal places (up to a specified
54 char string[64]; /* Magnitude of number with excess precision. */
55 int integer_digits; /* Number of digits before decimal point. */
56 int leading_nines; /* Number of `9's or `.'s at start of string. */
57 int leading_zeros; /* Number of `0's or `.'s at start of string. */
58 bool negative; /* Is the number negative? */
61 static void rounder_init (struct rounder *, double number, int max_decimals);
62 static int rounder_width (const struct rounder *, int decimals,
63 int *integer_digits, bool *negative);
64 static void rounder_format (const struct rounder *, int decimals,
67 typedef void data_out_converter_func (const union value *,
68 const struct fmt_spec *,
70 #define FMT(NAME, METHOD, IMIN, OMIN, IO, CATEGORY) \
71 static data_out_converter_func output_##METHOD;
74 static bool output_decimal (const struct rounder *, const struct fmt_spec *,
75 bool require_affixes, char *);
76 static bool output_scientific (double, const struct fmt_spec *,
77 bool require_affixes, char *);
79 static double power10 (int) PURE_FUNCTION;
80 static double power256 (int) PURE_FUNCTION;
82 static void output_infinite (double, const struct fmt_spec *, char *);
83 static void output_missing (const struct fmt_spec *, char *);
84 static void output_overflow (const struct fmt_spec *, char *);
85 static bool output_bcd_integer (double, int digits, char *);
86 static void output_binary_integer (uint64_t, int bytes, enum integer_format,
88 static void output_hex (const void *, size_t bytes, char *);
91 static data_out_converter_func *const converters[FMT_NUMBER_OF_FORMATS] =
93 #define FMT(NAME, METHOD, IMIN, OMIN, IO, CATEGORY) output_##METHOD,
97 /* Converts the INPUT value, encoded in INPUT_ENCODING, according to format
98 specification FORMAT, appending the output to OUTPUT in OUTPUT_ENCODING.
99 However, binary formats (FMT_P, FMT_PK, FMT_IB, FMT_PIB, FMT_RB) yield the
100 binary results, which may not be properly encoded for OUTPUT_ENCODING.
102 VALUE must be the correct width for FORMAT, that is, its width must be
103 fmt_var_width(FORMAT).
105 INPUT_ENCODING can normally be obtained by calling dict_get_encoding() on
106 the dictionary with which INPUT is associated. ENCODING is only important
107 when FORMAT's type is FMT_A. */
109 data_out_recode (const union value *input, const char *input_encoding,
110 const struct fmt_spec *format,
111 struct string *output, const char *output_encoding)
113 assert (fmt_check_output (format));
114 if (format->type == FMT_A)
116 char *in = CHAR_CAST (char *, value_str (input, format->w));
117 char *out = recode_string (output_encoding, input_encoding,
119 ds_put_cstr (output, out);
122 else if (fmt_get_category (format->type) == FMT_CAT_BINARY)
123 converters[format->type] (input, format,
124 ds_put_uninit (output, format->w));
127 char *utf8_encoded = data_out (input, input_encoding, format);
128 char *output_encoded = recode_string (output_encoding, UTF8,
130 ds_put_cstr (output, output_encoded);
131 free (output_encoded);
137 binary_to_utf8 (const char *in, struct pool *pool)
139 uint8_t *out = pool_alloc_unaligned (pool, strlen (in) * 2 + 1);
144 uint8_t byte = *in++;
145 int mblen = u8_uctomb (p, byte, 2);
151 return CHAR_CAST (char *, out);
154 /* Converts the INPUT value into a UTF-8 encoded string, according to format
155 specification FORMAT.
157 VALUE must be the correct width for FORMAT, that is, its width must be
158 fmt_var_width(FORMAT).
160 ENCODING must be the encoding of INPUT. Normally this can be obtained by
161 calling dict_get_encoding() on the dictionary with which INPUT is
162 associated. ENCODING is only important when FORMAT's type is FMT_A.
164 The return value is dynamically allocated, and must be freed by the caller.
165 If POOL is non-null, then the return value is allocated on that pool. */
167 data_out_pool (const union value *input, const char *encoding,
168 const struct fmt_spec *format, struct pool *pool)
170 assert (fmt_check_output (format));
171 if (format->type == FMT_A)
173 char *in = CHAR_CAST (char *, value_str (input, format->w));
174 return recode_string_pool (UTF8, encoding, in, format->w, pool);
176 else if (fmt_get_category (format->type) == FMT_CAT_BINARY)
180 assert (format->w + 1 <= sizeof tmp);
181 converters[format->type] (input, format, tmp);
182 return binary_to_utf8 (tmp, pool);
186 const struct fmt_number_style *style = settings_get_style (format->type);
187 size_t size = format->w + style->extra_bytes + 1;
190 output = pool_alloc_unaligned (pool, size);
191 converters[format->type] (input, format, output);
197 data_out (const union value *input, const char *encoding, const struct fmt_spec *format)
199 return data_out_pool (input, encoding, format, NULL);
203 /* Main conversion functions. */
205 /* Outputs F, COMMA, DOT, DOLLAR, PCT, E, CCA, CCB, CCC, CCD, and
208 output_number (const union value *input, const struct fmt_spec *format,
211 double number = input->f;
213 if (number == SYSMIS)
214 output_missing (format, output);
215 else if (!isfinite (number))
216 output_infinite (number, format, output);
219 if (format->type != FMT_E && fabs (number) < 1.5 * power10 (format->w))
222 rounder_init (&r, number, format->d);
224 if (output_decimal (&r, format, true, output)
225 || output_scientific (number, format, true, output)
226 || output_decimal (&r, format, false, output))
230 if (!output_scientific (number, format, false, output))
231 output_overflow (format, output);
235 /* Outputs N format. */
237 output_N (const union value *input, const struct fmt_spec *format,
240 double number = input->f * power10 (format->d);
241 if (input->f == SYSMIS || number < 0)
242 output_missing (format, output);
246 number = fabs (round (number));
247 if (number < power10 (format->w)
248 && c_snprintf (buf, 128, "%0*.0f", format->w, number) == format->w)
249 memcpy (output, buf, format->w);
251 output_overflow (format, output);
254 output[format->w] = '\0';
257 /* Outputs Z format. */
259 output_Z (const union value *input, const struct fmt_spec *format,
262 double number = input->f * power10 (format->d);
264 if (input->f == SYSMIS)
265 output_missing (format, output);
266 else if (fabs (number) < power10 (format->w)
267 && c_snprintf (buf, 128, "%0*.0f", format->w,
268 fabs (round (number))) == format->w)
270 if (number < 0 && strspn (buf, "0") < format->w)
272 char *p = &buf[format->w - 1];
273 *p = "}JKLMNOPQR"[*p - '0'];
275 memcpy (output, buf, format->w);
276 output[format->w] = '\0';
279 output_overflow (format, output);
282 /* Outputs P format. */
284 output_P (const union value *input, const struct fmt_spec *format,
287 if (output_bcd_integer (fabs (input->f * power10 (format->d)),
288 format->w * 2 - 1, output)
290 output[format->w - 1] |= 0xd;
292 output[format->w - 1] |= 0xf;
295 /* Outputs PK format. */
297 output_PK (const union value *input, const struct fmt_spec *format,
300 output_bcd_integer (input->f * power10 (format->d), format->w * 2, output);
303 /* Outputs IB format. */
305 output_IB (const union value *input, const struct fmt_spec *format,
308 double number = round (input->f * power10 (format->d));
309 if (input->f == SYSMIS
310 || number >= power256 (format->w) / 2 - 1
311 || number < -power256 (format->w) / 2)
312 memset (output, 0, format->w);
315 uint64_t integer = fabs (number);
318 output_binary_integer (integer, format->w,
319 settings_get_output_integer_format (),
323 output[format->w] = '\0';
326 /* Outputs PIB format. */
328 output_PIB (const union value *input, const struct fmt_spec *format,
331 double number = round (input->f * power10 (format->d));
332 if (input->f == SYSMIS
333 || number < 0 || number >= power256 (format->w))
334 memset (output, 0, format->w);
336 output_binary_integer (number, format->w,
337 settings_get_output_integer_format (), output);
339 output[format->w] = '\0';
342 /* Outputs PIBHEX format. */
344 output_PIBHEX (const union value *input, const struct fmt_spec *format,
347 double number = round (input->f);
348 if (input->f == SYSMIS)
349 output_missing (format, output);
350 else if (input->f < 0 || number >= power256 (format->w / 2))
351 output_overflow (format, output);
355 output_binary_integer (number, format->w / 2, INTEGER_MSB_FIRST, tmp);
356 output_hex (tmp, format->w / 2, output);
361 /* Outputs RB format. */
363 output_RB (const union value *input, const struct fmt_spec *format,
367 memcpy (output, &d, format->w);
369 output[format->w] = '\0';
372 /* Outputs RBHEX format. */
374 output_RBHEX (const union value *input, const struct fmt_spec *format,
379 output_hex (&d, format->w / 2, output);
382 /* Outputs DATE, ADATE, EDATE, JDATE, SDATE, QYR, MOYR, WKYR,
383 DATETIME, TIME, and DTIME formats. */
385 output_date (const union value *input, const struct fmt_spec *format,
388 double number = input->f;
389 int year, month, day, yday;
391 const char *template = fmt_date_template (format->type, format->w);
396 if (number == SYSMIS)
399 if (fmt_get_category (format->type) == FMT_CAT_DATE)
403 calendar_offset_to_gregorian (number / 60. / 60. / 24.,
404 &year, &month, &day, &yday);
405 number = fmod (number, 60. * 60. * 24.);
408 year = month = day = yday = 0;
410 while (*template != '\0')
416 while (template[count] == ch)
424 p += sprintf (p, "%02d", day);
426 p += sprintf (p, "%03d", yday);
430 p += sprintf (p, "%02d", month);
433 static const char *const months[12] =
435 "JAN", "FEB", "MAR", "APR", "MAY", "JUN",
436 "JUL", "AUG", "SEP", "OCT", "NOV", "DEC",
438 p = stpcpy (p, months[month - 1]);
445 p += sprintf (p, "%04d", year);
446 else if (format->type == FMT_DATETIME)
447 p = stpcpy (p, "****");
453 int epoch = settings_get_epoch ();
454 int offset = year - epoch;
455 if (offset < 0 || offset > 99)
457 p += sprintf (p, "%02d", abs (year) % 100);
461 p += sprintf (p, "%d", (month - 1) / 3 + 1);
464 p += sprintf (p, "%2d", (yday - 1) / 7 + 1);
469 number = fabs (number);
470 p += c_snprintf (p, 64, "%*.0f", count, floor (number / 60. / 60. / 24.));
471 number = fmod (number, 60. * 60. * 24.);
476 number = fabs (number);
477 p += c_snprintf (p, 64, "%0*.0f", count, floor (number / 60. / 60.));
478 number = fmod (number, 60. * 60.);
481 p += sprintf (p, "%02d", (int) floor (number / 60.));
482 number = fmod (number, 60.);
483 excess_width = format->w - (p - tmp);
484 if (excess_width < 0)
486 if (excess_width == 3 || excess_width == 4
487 || (excess_width >= 5 && format->d == 0))
488 p += sprintf (p, ":%02d", (int) number);
489 else if (excess_width >= 5)
491 int d = MIN (format->d, excess_width - 4);
493 c_snprintf (p, 64, ":%0*.*f", w, d, number);
494 if (settings_get_decimal_char (FMT_F) != '.')
496 char *cp = strchr (p, '.');
498 *cp = settings_get_decimal_char (FMT_F);
511 buf_copy_lpad (output, format->w, tmp, p - tmp, ' ');
512 output[format->w] = '\0';
516 output_overflow (format, output);
520 output_missing (format, output);
524 /* Outputs WKDAY format. */
526 output_WKDAY (const union value *input, const struct fmt_spec *format,
529 static const char *const weekdays[7] =
531 "SUNDAY", "MONDAY", "TUESDAY", "WEDNESDAY",
532 "THURSDAY", "FRIDAY", "SATURDAY",
535 if (input->f >= 1 && input->f < 8)
537 buf_copy_str_rpad (output, format->w,
538 weekdays[(int) input->f - 1], ' ');
539 output[format->w] = '\0';
543 if (input->f != SYSMIS)
544 msg (ME, _("Weekday number %f is not between 1 and 7."), input->f);
545 output_missing (format, output);
550 /* Outputs MONTH format. */
552 output_MONTH (const union value *input, const struct fmt_spec *format,
555 static const char *const months[12] =
557 "JANUARY", "FEBRUARY", "MARCH", "APRIL", "MAY", "JUNE",
558 "JULY", "AUGUST", "SEPTEMBER", "OCTOBER", "NOVEMBER", "DECEMBER",
561 if (input->f >= 1 && input->f < 13)
563 buf_copy_str_rpad (output, format->w, months[(int) input->f - 1], ' ');
564 output[format->w] = '\0';
568 if (input->f != SYSMIS)
569 msg (ME, _("Month number %f is not between 1 and 12."), input->f);
570 output_missing (format, output);
575 /* Outputs A format. */
577 output_A (const union value *input UNUSED,
578 const struct fmt_spec *format UNUSED, char *output UNUSED)
583 /* Outputs AHEX format. */
585 output_AHEX (const union value *input, const struct fmt_spec *format,
588 output_hex (value_str (input, format->w), format->w / 2, output);
591 /* Decimal and scientific formatting. */
593 /* If REQUEST plus the current *WIDTH fits within MAX_WIDTH,
594 increments *WIDTH by REQUEST and return true.
595 Otherwise returns false without changing *WIDTH. */
597 allocate_space (int request, int max_width, int *width)
599 assert (*width <= max_width);
600 if (request + *width <= max_width)
609 /* Tries to compose the number represented by R, in the style of
610 FORMAT, into OUTPUT. Returns true if successful, false on
611 failure, which occurs if FORMAT's width is too narrow. If
612 REQUIRE_AFFIXES is true, then the prefix and suffix specified
613 by FORMAT's style must be included; otherwise, they may be
614 omitted to make the number fit. */
616 output_decimal (const struct rounder *r, const struct fmt_spec *format,
617 bool require_affixes, char *output)
619 const struct fmt_number_style *style =
620 settings_get_style (format->type);
624 for (decimals = format->d; decimals >= 0; decimals--)
626 /* Formatted version of magnitude of NUMBER. */
629 /* Number of digits in MAGNITUDE's integer and fractional parts. */
632 /* Amount of space within the field width already claimed.
633 Initially this is the width of MAGNITUDE, then it is reduced
634 in stages as space is allocated to prefixes and suffixes and
635 grouping characters. */
638 /* Include various decorations? */
643 /* Position in output. */
646 /* Make sure there's room for the number's magnitude, plus
647 the negative suffix, plus (if negative) the negative
649 width = rounder_width (r, decimals, &integer_digits, &add_neg_prefix);
650 width += style->neg_suffix.width;
652 width += style->neg_prefix.width;
653 if (width > format->w)
656 /* If there's room for the prefix and suffix, allocate
657 space. If the affixes are required, but there's no
659 add_affixes = allocate_space (fmt_affix_width (style),
661 if (!add_affixes && require_affixes)
664 /* Check whether we should include grouping characters.
665 We need room for a complete set or we don't insert any at all.
666 We don't include grouping characters if decimal places were
667 requested but they were all dropped. */
668 add_grouping = (style->grouping != 0
669 && integer_digits > 3
670 && (format->d == 0 || decimals > 0)
671 && allocate_space ((integer_digits - 1) / 3,
674 /* Format the number's magnitude. */
675 rounder_format (r, decimals, magnitude);
677 /* Assemble number. */
679 if (format->w > width)
680 p = mempset (p, ' ', format->w - width);
682 p = stpcpy (p, style->neg_prefix.s);
684 p = stpcpy (p, style->prefix.s);
686 p = mempcpy (p, magnitude, integer_digits);
690 for (i = 0; i < integer_digits; i++)
692 if (i > 0 && (integer_digits - i) % 3 == 0)
693 *p++ = style->grouping;
699 *p++ = style->decimal;
700 p = mempcpy (p, &magnitude[integer_digits + 1], decimals);
703 p = stpcpy (p, style->suffix.s);
705 p = stpcpy (p, style->neg_suffix.s);
707 p = mempset (p, ' ', style->neg_suffix.width);
709 assert (p >= output + format->w);
710 assert (p <= output + format->w + style->extra_bytes);
718 /* Formats NUMBER into OUTPUT in scientific notation according to
719 the style of the format specified in FORMAT. */
721 output_scientific (double number, const struct fmt_spec *format,
722 bool require_affixes, char *output)
724 const struct fmt_number_style *style =
725 settings_get_style (format->type);
731 /* Allocate minimum required space. */
732 width = 6 + style->neg_suffix.width;
734 width += style->neg_prefix.width;
735 if (width > format->w)
738 /* Check for room for prefix and suffix. */
739 add_affixes = allocate_space (fmt_affix_width (style), format->w, &width);
740 if (require_affixes && !add_affixes)
743 /* Figure out number of characters we can use for the fraction,
744 if any. (If that turns out to be 1, then we'll output a
745 decimal point without any digits following; that's what the
746 # flag does in the call to c_snprintf, below.) */
747 fraction_width = MIN (MIN (format->d + 1, format->w - width), 16);
748 if (format->type != FMT_E && fraction_width == 1)
750 width += fraction_width;
752 /* Format (except suffix). */
754 if (width < format->w)
755 p = mempset (p, ' ', format->w - width);
757 p = stpcpy (p, style->neg_prefix.s);
759 p = stpcpy (p, style->prefix.s);
760 if (fraction_width > 0)
761 c_snprintf (p, 64, "%#.*E", fraction_width - 1, fabs (number));
763 c_snprintf (p, 64, "%.0E", fabs (number));
765 /* The C locale always uses a period `.' as a decimal point.
766 Translate to comma if necessary. */
767 if (style->decimal != '.')
769 char *cp = strchr (p, '.');
771 *cp = style->decimal;
774 /* Make exponent have exactly three digits, plus sign. */
776 char *cp = strchr (p, 'E') + 1;
777 long int exponent = strtol (cp, NULL, 10);
778 if (abs (exponent) > 999)
780 sprintf (cp, "%+04ld", exponent);
784 p = strchr (p, '\0');
786 p = stpcpy (p, style->suffix.s);
788 p = stpcpy (p, style->neg_suffix.s);
790 p = mempset (p, ' ', style->neg_suffix.width);
792 assert (p >= output + format->w);
793 assert (p <= output + format->w + style->extra_bytes);
799 /* Returns true if the magnitude represented by R should be
800 rounded up when chopped off at DECIMALS decimal places, false
801 if it should be rounded down. */
803 should_round_up (const struct rounder *r, int decimals)
805 int digit = r->string[r->integer_digits + decimals + 1];
806 assert (digit >= '0' && digit <= '9');
810 /* Initializes R for formatting the magnitude of NUMBER to no
811 more than MAX_DECIMAL decimal places. */
813 rounder_init (struct rounder *r, double number, int max_decimals)
815 assert (fabs (number) < 1e41);
816 assert (max_decimals >= 0 && max_decimals <= 16);
817 if (max_decimals == 0)
819 /* Fast path. No rounding needed.
821 We append ".00" to the integer representation because
822 round_up assumes that fractional digits are present. */
823 c_snprintf (r->string, 64, "%.0f.00", fabs (round (number)));
829 This is more difficult than it really should be because
830 we have to make sure that numbers that are exactly
831 halfway between two representations are always rounded
832 away from zero. This is not what sprintf normally does
833 (usually it rounds to even), so we have to fake it as
834 best we can, by formatting with extra precision and then
835 doing the rounding ourselves.
837 We take up to two rounds to format numbers. In the
838 first round, we obtain 2 digits of precision beyond
839 those requested by the user. If those digits are
840 exactly "50", then in a second round we format with as
841 many digits as are significant in a "double".
843 It might be better to directly implement our own
844 floating-point formatting routine instead of relying on
845 the system's sprintf implementation. But the classic
846 Steele and White paper on printing floating-point
847 numbers does not hint how to do what we want, and it's
848 not obvious how to change their algorithms to do so. It
849 would also be a lot of work. */
850 c_snprintf (r->string, 64, "%.*f", max_decimals + 2, fabs (number));
851 if (!strcmp (r->string + strlen (r->string) - 2, "50"))
853 int binary_exponent, decimal_exponent, format_decimals;
854 frexp (number, &binary_exponent);
855 decimal_exponent = binary_exponent * 3 / 10;
856 format_decimals = (DBL_DIG + 1) - decimal_exponent;
857 if (format_decimals > max_decimals + 2)
858 c_snprintf (r->string, 64, "%.*f", format_decimals, fabs (number));
862 if (r->string[0] == '0')
863 memmove (r->string, &r->string[1], strlen (r->string));
865 r->leading_zeros = strspn (r->string, "0.");
866 r->leading_nines = strspn (r->string, "9.");
867 r->integer_digits = strchr (r->string, '.') - r->string;
868 assert (r->integer_digits < 64);
869 assert (r->integer_digits >= 0);
870 r->negative = number < 0;
873 /* Returns the number of characters required to format the
874 magnitude represented by R to DECIMALS decimal places.
875 The return value includes integer digits and a decimal point
876 and fractional digits, if any, but it does not include any
877 negative prefix or suffix or other affixes.
879 *INTEGER_DIGITS is set to the number of digits before the
880 decimal point in the output, between 0 and 40.
882 If R represents a negative number and its rounded
883 representation would include at least one nonzero digit,
884 *NEGATIVE is set to true; otherwise, it is set to false. */
886 rounder_width (const struct rounder *r, int decimals,
887 int *integer_digits, bool *negative)
889 /* Calculate base measures. */
890 int width = r->integer_digits;
892 width += decimals + 1;
893 *integer_digits = r->integer_digits;
894 *negative = r->negative;
896 /* Rounding can cause adjustments. */
897 if (should_round_up (r, decimals))
899 /* Rounding up leading 9s adds a new digit (a 1). */
900 if (r->leading_nines >= width)
909 if (r->leading_zeros >= width)
911 /* All digits that remain after rounding are zeros.
912 Therefore we drop the negative sign. */
914 if (r->integer_digits == 0 && decimals == 0)
916 /* No digits at all are left. We need to display
917 at least a single digit (a zero). */
927 /* Formats the magnitude represented by R into OUTPUT, rounding
928 to DECIMALS decimal places. Exactly as many characters as
929 indicated by rounder_width are written. No terminating null
932 rounder_format (const struct rounder *r, int decimals, char *output)
934 int base_width = r->integer_digits + (decimals > 0 ? decimals + 1 : 0);
935 if (should_round_up (r, decimals))
937 if (r->leading_nines < base_width)
939 /* Rounding up. This is the common case where rounding
940 up doesn't add an extra digit. */
942 memcpy (output, r->string, base_width);
943 for (p = output + base_width - 1; ; p--)
945 assert (p >= output);
948 else if (*p >= '0' && *p <= '8')
959 /* Rounding up leading 9s causes the result to be a 1
960 followed by a number of 0s, plus a decimal point. */
963 p = mempset (p, '0', r->integer_digits);
967 p = mempset (p, '0', decimals);
969 assert (p == output + base_width + 1);
975 if (r->integer_digits != 0 || decimals != 0)
977 /* Common case: just copy the digits. */
978 memcpy (output, r->string, base_width);
982 /* No digits remain. The output is just a zero. */
988 /* Helper functions. */
991 static double PURE_FUNCTION
994 static const double p[] =
996 1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9,
997 1e10, 1e11, 1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19,
998 1e20, 1e21, 1e22, 1e23, 1e24, 1e25, 1e26, 1e27, 1e28, 1e29,
999 1e30, 1e31, 1e32, 1e33, 1e34, 1e35, 1e36, 1e37, 1e38, 1e39,
1002 return x >= 0 && x < sizeof p / sizeof *p ? p[x] : pow (10.0, x);
1005 /* Returns 256**X. */
1006 static double PURE_FUNCTION
1009 static const double p[] =
1018 72057594037927936.0,
1019 18446744073709551616.0
1021 return x >= 0 && x < sizeof p / sizeof *p ? p[x] : pow (256.0, x);
1024 /* Formats non-finite NUMBER into OUTPUT according to the width
1027 output_infinite (double number, const struct fmt_spec *format, char *output)
1029 assert (!isfinite (number));
1037 else if (isinf (number))
1038 s = number > 0 ? "+Infinity" : "-Infinity";
1042 buf_copy_str_lpad (output, format->w, s, ' ');
1045 output_overflow (format, output);
1047 output[format->w] = '\0';
1050 /* Formats OUTPUT as a missing value for the given FORMAT. */
1052 output_missing (const struct fmt_spec *format, char *output)
1054 memset (output, ' ', format->w);
1056 if (format->type != FMT_N)
1058 int dot_ofs = (format->type == FMT_PCT ? 2
1059 : format->type == FMT_E ? 5
1061 output[MAX (0, format->w - format->d - dot_ofs)] = '.';
1064 output[format->w - 1] = '.';
1066 output[format->w] = '\0';
1069 /* Formats OUTPUT for overflow given FORMAT. */
1071 output_overflow (const struct fmt_spec *format, char *output)
1073 memset (output, '*', format->w);
1074 output[format->w] = '\0';
1077 /* Converts the integer part of NUMBER to a packed BCD number
1078 with the given number of DIGITS in OUTPUT. If DIGITS is odd,
1079 the least significant nibble of the final byte in OUTPUT is
1080 set to 0. Returns true if successful, false if NUMBER is not
1081 representable. On failure, OUTPUT is cleared to all zero
1084 output_bcd_integer (double number, int digits, char *output)
1088 assert (digits < sizeof decimal);
1090 output[DIV_RND_UP (digits, 2)] = '\0';
1091 if (number != SYSMIS
1093 && number < power10 (digits)
1094 && c_snprintf (decimal, 64, "%0*.0f", digits, round (number)) == digits)
1096 const char *src = decimal;
1099 for (i = 0; i < digits / 2; i++)
1101 int d0 = *src++ - '0';
1102 int d1 = *src++ - '0';
1103 *output++ = (d0 << 4) + d1;
1106 *output = (*src - '0') << 4;
1112 memset (output, 0, DIV_RND_UP (digits, 2));
1117 /* Writes VALUE to OUTPUT as a BYTES-byte binary integer of the
1118 given INTEGER_FORMAT. */
1120 output_binary_integer (uint64_t value, int bytes,
1121 enum integer_format integer_format, char *output)
1123 integer_put (value, integer_format, output, bytes);
1126 /* Converts the BYTES bytes in DATA to twice as many hexadecimal
1127 digits in OUTPUT. */
1129 output_hex (const void *data_, size_t bytes, char *output)
1131 const uint8_t *data = data_;
1134 for (i = 0; i < bytes; i++)
1136 static const char hex_digits[] = "0123456789ABCDEF";
1137 *output++ = hex_digits[data[i] >> 4];
1138 *output++ = hex_digits[data[i] & 15];