1 /* Test of POSIX compatible vsnprintf() and snprintf() functions.
2 Copyright (C) 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 2, or (at your option)
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, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18 /* Written by Bruno Haible <bruno@clisp.org>, 2007. */
20 /* The Compaq (ex-DEC) C 6.4 compiler chokes on the expression 0.0 / 0.0. */
25 static double zero = 0.0;
29 # define NaN() (0.0 / 0.0)
33 test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
38 /* Test return value convention. */
40 for (size = 0; size <= 8; size++)
44 memcpy (buf, "DEADBEEF", 8);
45 retval = my_snprintf (buf, size, "%d", 12345);
51 ASSERT (memcmp (buf, "12345", size - 1) == 0);
52 ASSERT (buf[size - 1] == '\0');
54 ASSERT (memcmp (buf + size, "DEADBEEF" + size, 8 - size) == 0);
58 ASSERT (memcmp (buf, "12345\0EF", 8) == 0);
62 /* Test support of size specifiers as in C99. */
67 my_snprintf (result, sizeof (result), "%ju %d", (uintmax_t) 12345671, 33, 44, 55);
68 ASSERT (strcmp (result, "12345671 33") == 0);
69 ASSERT (retval == strlen (result));
75 my_snprintf (result, sizeof (result), "%zu %d", (size_t) 12345672, 33, 44, 55);
76 ASSERT (strcmp (result, "12345672 33") == 0);
77 ASSERT (retval == strlen (result));
83 my_snprintf (result, sizeof (result), "%tu %d", (ptrdiff_t) 12345673, 33, 44, 55);
84 ASSERT (strcmp (result, "12345673 33") == 0);
85 ASSERT (retval == strlen (result));
91 my_snprintf (result, sizeof (result), "%Lg %d", (long double) 1.5, 33, 44, 55);
92 ASSERT (strcmp (result, "1.5 33") == 0);
93 ASSERT (retval == strlen (result));
96 /* Test the support of the 'a' and 'A' conversion specifier for hexadecimal
97 output of floating-point numbers. */
99 { /* A positive number. */
102 my_snprintf (result, sizeof (result), "%a %d", 3.1416015625, 33, 44, 55);
103 ASSERT (strcmp (result, "0x1.922p+1 33") == 0
104 || strcmp (result, "0x3.244p+0 33") == 0
105 || strcmp (result, "0x6.488p-1 33") == 0
106 || strcmp (result, "0xc.91p-2 33") == 0);
107 ASSERT (retval == strlen (result));
110 { /* A negative number. */
113 my_snprintf (result, sizeof (result), "%A %d", -3.1416015625, 33, 44, 55);
114 ASSERT (strcmp (result, "-0X1.922P+1 33") == 0
115 || strcmp (result, "-0X3.244P+0 33") == 0
116 || strcmp (result, "-0X6.488P-1 33") == 0
117 || strcmp (result, "-0XC.91P-2 33") == 0);
118 ASSERT (retval == strlen (result));
121 { /* Positive zero. */
124 my_snprintf (result, sizeof (result), "%a %d", 0.0, 33, 44, 55);
125 ASSERT (strcmp (result, "0x0p+0 33") == 0);
126 ASSERT (retval == strlen (result));
129 { /* Negative zero. */
132 my_snprintf (result, sizeof (result), "%a %d", -0.0, 33, 44, 55);
133 ASSERT (strcmp (result, "-0x0p+0 33") == 0);
134 ASSERT (retval == strlen (result));
137 { /* Positive infinity. */
140 my_snprintf (result, sizeof (result), "%a %d", 1.0 / 0.0, 33, 44, 55);
141 ASSERT (strcmp (result, "inf 33") == 0);
142 ASSERT (retval == strlen (result));
145 { /* Negative infinity. */
148 my_snprintf (result, sizeof (result), "%a %d", -1.0 / 0.0, 33, 44, 55);
149 ASSERT (strcmp (result, "-inf 33") == 0);
150 ASSERT (retval == strlen (result));
156 my_snprintf (result, sizeof (result), "%a %d", NaN (), 33, 44, 55);
157 ASSERT (strcmp (result, "nan 33") == 0);
158 ASSERT (retval == strlen (result));
161 { /* Rounding near the decimal point. */
164 my_snprintf (result, sizeof (result), "%.0a %d", 1.5, 33, 44, 55);
165 ASSERT (strcmp (result, "0x2p+0 33") == 0
166 || strcmp (result, "0x3p-1 33") == 0
167 || strcmp (result, "0x6p-2 33") == 0
168 || strcmp (result, "0xcp-3 33") == 0);
169 ASSERT (retval == strlen (result));
172 { /* Rounding with precision 0. */
175 my_snprintf (result, sizeof (result), "%.0a %d", 1.51, 33, 44, 55);
176 ASSERT (strcmp (result, "0x2p+0 33") == 0
177 || strcmp (result, "0x3p-1 33") == 0
178 || strcmp (result, "0x6p-2 33") == 0
179 || strcmp (result, "0xcp-3 33") == 0);
180 ASSERT (retval == strlen (result));
183 { /* Rounding with precision 1. */
186 my_snprintf (result, sizeof (result), "%.1a %d", 1.51, 33, 44, 55);
187 ASSERT (strcmp (result, "0x1.8p+0 33") == 0
188 || strcmp (result, "0x3.0p-1 33") == 0
189 || strcmp (result, "0x6.1p-2 33") == 0
190 || strcmp (result, "0xc.1p-3 33") == 0);
191 ASSERT (retval == strlen (result));
194 { /* Rounding with precision 2. */
197 my_snprintf (result, sizeof (result), "%.2a %d", 1.51, 33, 44, 55);
198 ASSERT (strcmp (result, "0x1.83p+0 33") == 0
199 || strcmp (result, "0x3.05p-1 33") == 0
200 || strcmp (result, "0x6.0ap-2 33") == 0
201 || strcmp (result, "0xc.14p-3 33") == 0);
202 ASSERT (retval == strlen (result));
205 { /* Rounding with precision 3. */
208 my_snprintf (result, sizeof (result), "%.3a %d", 1.51, 33, 44, 55);
209 ASSERT (strcmp (result, "0x1.829p+0 33") == 0
210 || strcmp (result, "0x3.052p-1 33") == 0
211 || strcmp (result, "0x6.0a4p-2 33") == 0
212 || strcmp (result, "0xc.148p-3 33") == 0);
213 ASSERT (retval == strlen (result));
216 { /* Rounding can turn a ...FFF into a ...000. */
219 my_snprintf (result, sizeof (result), "%.3a %d", 1.49999, 33, 44, 55);
220 ASSERT (strcmp (result, "0x1.800p+0 33") == 0
221 || strcmp (result, "0x3.000p-1 33") == 0
222 || strcmp (result, "0x6.000p-2 33") == 0
223 || strcmp (result, "0xc.000p-3 33") == 0);
224 ASSERT (retval == strlen (result));
227 { /* Rounding can turn a ...FFF into a ...000.
228 This shows a MacOS X 10.3.9 (Darwin 7.9) bug. */
231 my_snprintf (result, sizeof (result), "%.1a %d", 1.999, 33, 44, 55);
232 ASSERT (strcmp (result, "0x1.0p+1 33") == 0
233 || strcmp (result, "0x2.0p+0 33") == 0
234 || strcmp (result, "0x4.0p-1 33") == 0
235 || strcmp (result, "0x8.0p-2 33") == 0);
236 ASSERT (retval == strlen (result));
242 my_snprintf (result, sizeof (result), "%10a %d", 1.75, 33, 44, 55);
243 ASSERT (strcmp (result, " 0x1.cp+0 33") == 0
244 || strcmp (result, " 0x3.8p-1 33") == 0
245 || strcmp (result, " 0x7p-2 33") == 0
246 || strcmp (result, " 0xep-3 33") == 0);
247 ASSERT (retval == strlen (result));
250 { /* Small precision. */
253 my_snprintf (result, sizeof (result), "%.10a %d", 1.75, 33, 44, 55);
254 ASSERT (strcmp (result, "0x1.c000000000p+0 33") == 0
255 || strcmp (result, "0x3.8000000000p-1 33") == 0
256 || strcmp (result, "0x7.0000000000p-2 33") == 0
257 || strcmp (result, "0xe.0000000000p-3 33") == 0);
258 ASSERT (retval == strlen (result));
261 { /* Large precision. */
264 my_snprintf (result, sizeof (result), "%.50a %d", 1.75, 33, 44, 55);
265 ASSERT (strcmp (result, "0x1.c0000000000000000000000000000000000000000000000000p+0 33") == 0
266 || strcmp (result, "0x3.80000000000000000000000000000000000000000000000000p-1 33") == 0
267 || strcmp (result, "0x7.00000000000000000000000000000000000000000000000000p-2 33") == 0
268 || strcmp (result, "0xe.00000000000000000000000000000000000000000000000000p-3 33") == 0);
269 ASSERT (retval == strlen (result));
275 my_snprintf (result, sizeof (result), "%-10a %d", 1.75, 33, 44, 55);
276 ASSERT (strcmp (result, "0x1.cp+0 33") == 0
277 || strcmp (result, "0x3.8p-1 33") == 0
278 || strcmp (result, "0x7p-2 33") == 0
279 || strcmp (result, "0xep-3 33") == 0);
280 ASSERT (retval == strlen (result));
283 { /* FLAG_SHOWSIGN. */
286 my_snprintf (result, sizeof (result), "%+a %d", 1.75, 33, 44, 55);
287 ASSERT (strcmp (result, "+0x1.cp+0 33") == 0
288 || strcmp (result, "+0x3.8p-1 33") == 0
289 || strcmp (result, "+0x7p-2 33") == 0
290 || strcmp (result, "+0xep-3 33") == 0);
291 ASSERT (retval == strlen (result));
297 my_snprintf (result, sizeof (result), "% a %d", 1.75, 33, 44, 55);
298 ASSERT (strcmp (result, " 0x1.cp+0 33") == 0
299 || strcmp (result, " 0x3.8p-1 33") == 0
300 || strcmp (result, " 0x7p-2 33") == 0
301 || strcmp (result, " 0xep-3 33") == 0);
302 ASSERT (retval == strlen (result));
308 my_snprintf (result, sizeof (result), "%#a %d", 1.75, 33, 44, 55);
309 ASSERT (strcmp (result, "0x1.cp+0 33") == 0
310 || strcmp (result, "0x3.8p-1 33") == 0
311 || strcmp (result, "0x7.p-2 33") == 0
312 || strcmp (result, "0xe.p-3 33") == 0);
313 ASSERT (retval == strlen (result));
319 my_snprintf (result, sizeof (result), "%#a %d", 1.0, 33, 44, 55);
320 ASSERT (strcmp (result, "0x1.p+0 33") == 0
321 || strcmp (result, "0x2.p-1 33") == 0
322 || strcmp (result, "0x4.p-2 33") == 0
323 || strcmp (result, "0x8.p-3 33") == 0);
324 ASSERT (retval == strlen (result));
327 { /* FLAG_ZERO with finite number. */
330 my_snprintf (result, sizeof (result), "%010a %d", 1.75, 33, 44, 55);
331 ASSERT (strcmp (result, "0x001.cp+0 33") == 0
332 || strcmp (result, "0x003.8p-1 33") == 0
333 || strcmp (result, "0x00007p-2 33") == 0
334 || strcmp (result, "0x0000ep-3 33") == 0);
335 ASSERT (retval == strlen (result));
338 { /* FLAG_ZERO with infinite number. */
341 my_snprintf (result, sizeof (result), "%010a %d", 1.0 / 0.0, 33, 44, 55);
342 /* "0000000inf 33" is not a valid result; see
343 <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html> */
344 ASSERT (strcmp (result, " inf 33") == 0);
345 ASSERT (retval == strlen (result));
348 { /* FLAG_ZERO with NaN. */
351 my_snprintf (result, sizeof (result), "%010a %d", NaN (), 33, 44, 55);
352 /* "0000000nan 33" is not a valid result; see
353 <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html> */
354 ASSERT (strcmp (result, " nan 33") == 0);
355 ASSERT (retval == strlen (result));
358 { /* A positive number. */
361 my_snprintf (result, sizeof (result), "%La %d", 3.1416015625L, 33, 44, 55);
362 ASSERT (strcmp (result, "0x1.922p+1 33") == 0
363 || strcmp (result, "0x3.244p+0 33") == 0
364 || strcmp (result, "0x6.488p-1 33") == 0
365 || strcmp (result, "0xc.91p-2 33") == 0);
366 ASSERT (retval == strlen (result));
369 { /* A negative number. */
372 my_snprintf (result, sizeof (result), "%LA %d", -3.1416015625L, 33, 44, 55);
373 ASSERT (strcmp (result, "-0X1.922P+1 33") == 0
374 || strcmp (result, "-0X3.244P+0 33") == 0
375 || strcmp (result, "-0X6.488P-1 33") == 0
376 || strcmp (result, "-0XC.91P-2 33") == 0);
377 ASSERT (retval == strlen (result));
380 { /* Positive zero. */
383 my_snprintf (result, sizeof (result), "%La %d", 0.0L, 33, 44, 55);
384 ASSERT (strcmp (result, "0x0p+0 33") == 0);
385 ASSERT (retval == strlen (result));
388 { /* Negative zero. */
391 my_snprintf (result, sizeof (result), "%La %d", -0.0L, 33, 44, 55);
392 ASSERT (strcmp (result, "-0x0p+0 33") == 0);
393 ASSERT (retval == strlen (result));
396 { /* Positive infinity. */
399 my_snprintf (result, sizeof (result), "%La %d", 1.0L / 0.0L, 33, 44, 55);
400 ASSERT (strcmp (result, "inf 33") == 0);
401 ASSERT (retval == strlen (result));
404 { /* Negative infinity. */
407 my_snprintf (result, sizeof (result), "%La %d", -1.0L / 0.0L, 33, 44, 55);
408 ASSERT (strcmp (result, "-inf 33") == 0);
409 ASSERT (retval == strlen (result));
415 my_snprintf (result, sizeof (result), "%La %d", 0.0L / 0.0L, 33, 44, 55);
416 ASSERT (strcmp (result, "nan 33") == 0);
417 ASSERT (retval == strlen (result));
420 { /* Rounding near the decimal point. */
423 my_snprintf (result, sizeof (result), "%.0La %d", 1.5L, 33, 44, 55);
424 ASSERT (strcmp (result, "0x2p+0 33") == 0
425 || strcmp (result, "0x3p-1 33") == 0
426 || strcmp (result, "0x6p-2 33") == 0
427 || strcmp (result, "0xcp-3 33") == 0);
428 ASSERT (retval == strlen (result));
431 { /* Rounding with precision 0. */
434 my_snprintf (result, sizeof (result), "%.0La %d", 1.51L, 33, 44, 55);
435 ASSERT (strcmp (result, "0x2p+0 33") == 0
436 || strcmp (result, "0x3p-1 33") == 0
437 || strcmp (result, "0x6p-2 33") == 0
438 || strcmp (result, "0xcp-3 33") == 0);
439 ASSERT (retval == strlen (result));
442 { /* Rounding with precision 1. */
445 my_snprintf (result, sizeof (result), "%.1La %d", 1.51L, 33, 44, 55);
446 ASSERT (strcmp (result, "0x1.8p+0 33") == 0
447 || strcmp (result, "0x3.0p-1 33") == 0
448 || strcmp (result, "0x6.1p-2 33") == 0
449 || strcmp (result, "0xc.1p-3 33") == 0);
450 ASSERT (retval == strlen (result));
453 { /* Rounding with precision 2. */
456 my_snprintf (result, sizeof (result), "%.2La %d", 1.51L, 33, 44, 55);
457 ASSERT (strcmp (result, "0x1.83p+0 33") == 0
458 || strcmp (result, "0x3.05p-1 33") == 0
459 || strcmp (result, "0x6.0ap-2 33") == 0
460 || strcmp (result, "0xc.14p-3 33") == 0);
461 ASSERT (retval == strlen (result));
464 { /* Rounding with precision 3. */
467 my_snprintf (result, sizeof (result), "%.3La %d", 1.51L, 33, 44, 55);
468 ASSERT (strcmp (result, "0x1.829p+0 33") == 0
469 || strcmp (result, "0x3.052p-1 33") == 0
470 || strcmp (result, "0x6.0a4p-2 33") == 0
471 || strcmp (result, "0xc.148p-3 33") == 0);
472 ASSERT (retval == strlen (result));
475 { /* Rounding can turn a ...FFF into a ...000. */
478 my_snprintf (result, sizeof (result), "%.3La %d", 1.49999L, 33, 44, 55);
479 ASSERT (strcmp (result, "0x1.800p+0 33") == 0
480 || strcmp (result, "0x3.000p-1 33") == 0
481 || strcmp (result, "0x6.000p-2 33") == 0
482 || strcmp (result, "0xc.000p-3 33") == 0);
483 ASSERT (retval == strlen (result));
486 { /* Rounding can turn a ...FFF into a ...000.
487 This shows a MacOS X 10.3.9 (Darwin 7.9) bug and a
488 glibc 2.4 bug <http://sourceware.org/bugzilla/show_bug.cgi?id=2908>. */
491 my_snprintf (result, sizeof (result), "%.1La %d", 1.999L, 33, 44, 55);
492 ASSERT (strcmp (result, "0x1.0p+1 33") == 0
493 || strcmp (result, "0x2.0p+0 33") == 0
494 || strcmp (result, "0x4.0p-1 33") == 0
495 || strcmp (result, "0x8.0p-2 33") == 0);
496 ASSERT (retval == strlen (result));
502 my_snprintf (result, sizeof (result), "%10La %d", 1.75L, 33, 44, 55);
503 ASSERT (strcmp (result, " 0x1.cp+0 33") == 0
504 || strcmp (result, " 0x3.8p-1 33") == 0
505 || strcmp (result, " 0x7p-2 33") == 0
506 || strcmp (result, " 0xep-3 33") == 0);
507 ASSERT (retval == strlen (result));
510 { /* Small precision. */
513 my_snprintf (result, sizeof (result), "%.10La %d", 1.75L, 33, 44, 55);
514 ASSERT (strcmp (result, "0x1.c000000000p+0 33") == 0
515 || strcmp (result, "0x3.8000000000p-1 33") == 0
516 || strcmp (result, "0x7.0000000000p-2 33") == 0
517 || strcmp (result, "0xe.0000000000p-3 33") == 0);
518 ASSERT (retval == strlen (result));
521 { /* Large precision. */
524 my_snprintf (result, sizeof (result), "%.50La %d", 1.75L, 33, 44, 55);
525 ASSERT (strcmp (result, "0x1.c0000000000000000000000000000000000000000000000000p+0 33") == 0
526 || strcmp (result, "0x3.80000000000000000000000000000000000000000000000000p-1 33") == 0
527 || strcmp (result, "0x7.00000000000000000000000000000000000000000000000000p-2 33") == 0
528 || strcmp (result, "0xe.00000000000000000000000000000000000000000000000000p-3 33") == 0);
529 ASSERT (retval == strlen (result));
535 my_snprintf (result, sizeof (result), "%-10La %d", 1.75L, 33, 44, 55);
536 ASSERT (strcmp (result, "0x1.cp+0 33") == 0
537 || strcmp (result, "0x3.8p-1 33") == 0
538 || strcmp (result, "0x7p-2 33") == 0
539 || strcmp (result, "0xep-3 33") == 0);
540 ASSERT (retval == strlen (result));
543 { /* FLAG_SHOWSIGN. */
546 my_snprintf (result, sizeof (result), "%+La %d", 1.75L, 33, 44, 55);
547 ASSERT (strcmp (result, "+0x1.cp+0 33") == 0
548 || strcmp (result, "+0x3.8p-1 33") == 0
549 || strcmp (result, "+0x7p-2 33") == 0
550 || strcmp (result, "+0xep-3 33") == 0);
551 ASSERT (retval == strlen (result));
557 my_snprintf (result, sizeof (result), "% La %d", 1.75L, 33, 44, 55);
558 ASSERT (strcmp (result, " 0x1.cp+0 33") == 0
559 || strcmp (result, " 0x3.8p-1 33") == 0
560 || strcmp (result, " 0x7p-2 33") == 0
561 || strcmp (result, " 0xep-3 33") == 0);
562 ASSERT (retval == strlen (result));
568 my_snprintf (result, sizeof (result), "%#La %d", 1.75L, 33, 44, 55);
569 ASSERT (strcmp (result, "0x1.cp+0 33") == 0
570 || strcmp (result, "0x3.8p-1 33") == 0
571 || strcmp (result, "0x7.p-2 33") == 0
572 || strcmp (result, "0xe.p-3 33") == 0);
573 ASSERT (retval == strlen (result));
579 my_snprintf (result, sizeof (result), "%#La %d", 1.0L, 33, 44, 55);
580 ASSERT (strcmp (result, "0x1.p+0 33") == 0
581 || strcmp (result, "0x2.p-1 33") == 0
582 || strcmp (result, "0x4.p-2 33") == 0
583 || strcmp (result, "0x8.p-3 33") == 0);
584 ASSERT (retval == strlen (result));
587 { /* FLAG_ZERO with finite number. */
590 my_snprintf (result, sizeof (result), "%010La %d", 1.75L, 33, 44, 55);
591 ASSERT (strcmp (result, "0x001.cp+0 33") == 0
592 || strcmp (result, "0x003.8p-1 33") == 0
593 || strcmp (result, "0x00007p-2 33") == 0
594 || strcmp (result, "0x0000ep-3 33") == 0);
595 ASSERT (retval == strlen (result));
598 { /* FLAG_ZERO with infinite number. */
601 my_snprintf (result, sizeof (result), "%010La %d", 1.0L / 0.0L, 33, 44, 55);
602 /* "0000000inf 33" is not a valid result; see
603 <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html> */
604 ASSERT (strcmp (result, " inf 33") == 0);
605 ASSERT (retval == strlen (result));
608 { /* FLAG_ZERO with NaN. */
611 my_snprintf (result, sizeof (result), "%010La %d", 0.0L / 0.0L, 33, 44, 55);
612 /* "0000000nan 33" is not a valid result; see
613 <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html> */
614 ASSERT (strcmp (result, " nan 33") == 0);
615 ASSERT (retval == strlen (result));
618 /* Test the support of the %n format directive. */
624 my_snprintf (result, sizeof (result), "%d %n", 123, &count, 33, 44, 55);
625 ASSERT (strcmp (result, "123 ") == 0);
626 ASSERT (retval == strlen (result));
630 /* Test the support of the POSIX/XSI format strings with positions. */
635 my_snprintf (result, sizeof (result), "%2$d %1$d", 33, 55);
636 ASSERT (strcmp (result, "55 33") == 0);
637 ASSERT (retval == strlen (result));