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));
92 my_snprintf (result, sizeof (result), "%Lg %d", (long double) 1.5, 33, 44, 55);
93 ASSERT (strcmp (result, "1.5 33") == 0);
94 ASSERT (retval == strlen (result));
98 /* Test the support of the 'a' and 'A' conversion specifier for hexadecimal
99 output of floating-point numbers. */
101 { /* A positive number. */
104 my_snprintf (result, sizeof (result), "%a %d", 3.1416015625, 33, 44, 55);
105 ASSERT (strcmp (result, "0x1.922p+1 33") == 0
106 || strcmp (result, "0x3.244p+0 33") == 0
107 || strcmp (result, "0x6.488p-1 33") == 0
108 || strcmp (result, "0xc.91p-2 33") == 0);
109 ASSERT (retval == strlen (result));
112 { /* A negative number. */
115 my_snprintf (result, sizeof (result), "%A %d", -3.1416015625, 33, 44, 55);
116 ASSERT (strcmp (result, "-0X1.922P+1 33") == 0
117 || strcmp (result, "-0X3.244P+0 33") == 0
118 || strcmp (result, "-0X6.488P-1 33") == 0
119 || strcmp (result, "-0XC.91P-2 33") == 0);
120 ASSERT (retval == strlen (result));
123 { /* Positive zero. */
126 my_snprintf (result, sizeof (result), "%a %d", 0.0, 33, 44, 55);
127 ASSERT (strcmp (result, "0x0p+0 33") == 0);
128 ASSERT (retval == strlen (result));
131 { /* Negative zero. */
134 my_snprintf (result, sizeof (result), "%a %d", -0.0, 33, 44, 55);
135 ASSERT (strcmp (result, "-0x0p+0 33") == 0);
136 ASSERT (retval == strlen (result));
139 { /* Positive infinity. */
142 my_snprintf (result, sizeof (result), "%a %d", 1.0 / 0.0, 33, 44, 55);
143 ASSERT (strcmp (result, "inf 33") == 0);
144 ASSERT (retval == strlen (result));
147 { /* Negative infinity. */
150 my_snprintf (result, sizeof (result), "%a %d", -1.0 / 0.0, 33, 44, 55);
151 ASSERT (strcmp (result, "-inf 33") == 0);
152 ASSERT (retval == strlen (result));
158 my_snprintf (result, sizeof (result), "%a %d", NaN (), 33, 44, 55);
159 ASSERT (strcmp (result, "nan 33") == 0);
160 ASSERT (retval == strlen (result));
163 { /* Rounding near the decimal point. */
166 my_snprintf (result, sizeof (result), "%.0a %d", 1.5, 33, 44, 55);
167 ASSERT (strcmp (result, "0x2p+0 33") == 0
168 || strcmp (result, "0x3p-1 33") == 0
169 || strcmp (result, "0x6p-2 33") == 0
170 || strcmp (result, "0xcp-3 33") == 0);
171 ASSERT (retval == strlen (result));
174 { /* Rounding with precision 0. */
177 my_snprintf (result, sizeof (result), "%.0a %d", 1.51, 33, 44, 55);
178 ASSERT (strcmp (result, "0x2p+0 33") == 0
179 || strcmp (result, "0x3p-1 33") == 0
180 || strcmp (result, "0x6p-2 33") == 0
181 || strcmp (result, "0xcp-3 33") == 0);
182 ASSERT (retval == strlen (result));
185 { /* Rounding with precision 1. */
188 my_snprintf (result, sizeof (result), "%.1a %d", 1.51, 33, 44, 55);
189 ASSERT (strcmp (result, "0x1.8p+0 33") == 0
190 || strcmp (result, "0x3.0p-1 33") == 0
191 || strcmp (result, "0x6.1p-2 33") == 0
192 || strcmp (result, "0xc.1p-3 33") == 0);
193 ASSERT (retval == strlen (result));
196 { /* Rounding with precision 2. */
199 my_snprintf (result, sizeof (result), "%.2a %d", 1.51, 33, 44, 55);
200 ASSERT (strcmp (result, "0x1.83p+0 33") == 0
201 || strcmp (result, "0x3.05p-1 33") == 0
202 || strcmp (result, "0x6.0ap-2 33") == 0
203 || strcmp (result, "0xc.14p-3 33") == 0);
204 ASSERT (retval == strlen (result));
207 { /* Rounding with precision 3. */
210 my_snprintf (result, sizeof (result), "%.3a %d", 1.51, 33, 44, 55);
211 ASSERT (strcmp (result, "0x1.829p+0 33") == 0
212 || strcmp (result, "0x3.052p-1 33") == 0
213 || strcmp (result, "0x6.0a4p-2 33") == 0
214 || strcmp (result, "0xc.148p-3 33") == 0);
215 ASSERT (retval == strlen (result));
218 { /* Rounding can turn a ...FFF into a ...000. */
221 my_snprintf (result, sizeof (result), "%.3a %d", 1.49999, 33, 44, 55);
222 ASSERT (strcmp (result, "0x1.800p+0 33") == 0
223 || strcmp (result, "0x3.000p-1 33") == 0
224 || strcmp (result, "0x6.000p-2 33") == 0
225 || strcmp (result, "0xc.000p-3 33") == 0);
226 ASSERT (retval == strlen (result));
229 { /* Rounding can turn a ...FFF into a ...000.
230 This shows a MacOS X 10.3.9 (Darwin 7.9) bug. */
233 my_snprintf (result, sizeof (result), "%.1a %d", 1.999, 33, 44, 55);
234 ASSERT (strcmp (result, "0x1.0p+1 33") == 0
235 || strcmp (result, "0x2.0p+0 33") == 0
236 || strcmp (result, "0x4.0p-1 33") == 0
237 || strcmp (result, "0x8.0p-2 33") == 0);
238 ASSERT (retval == strlen (result));
244 my_snprintf (result, sizeof (result), "%10a %d", 1.75, 33, 44, 55);
245 ASSERT (strcmp (result, " 0x1.cp+0 33") == 0
246 || strcmp (result, " 0x3.8p-1 33") == 0
247 || strcmp (result, " 0x7p-2 33") == 0
248 || strcmp (result, " 0xep-3 33") == 0);
249 ASSERT (retval == strlen (result));
252 { /* Small precision. */
255 my_snprintf (result, sizeof (result), "%.10a %d", 1.75, 33, 44, 55);
256 ASSERT (strcmp (result, "0x1.c000000000p+0 33") == 0
257 || strcmp (result, "0x3.8000000000p-1 33") == 0
258 || strcmp (result, "0x7.0000000000p-2 33") == 0
259 || strcmp (result, "0xe.0000000000p-3 33") == 0);
260 ASSERT (retval == strlen (result));
263 { /* Large precision. */
266 my_snprintf (result, sizeof (result), "%.50a %d", 1.75, 33, 44, 55);
267 ASSERT (strcmp (result, "0x1.c0000000000000000000000000000000000000000000000000p+0 33") == 0
268 || strcmp (result, "0x3.80000000000000000000000000000000000000000000000000p-1 33") == 0
269 || strcmp (result, "0x7.00000000000000000000000000000000000000000000000000p-2 33") == 0
270 || strcmp (result, "0xe.00000000000000000000000000000000000000000000000000p-3 33") == 0);
271 ASSERT (retval == strlen (result));
277 my_snprintf (result, sizeof (result), "%-10a %d", 1.75, 33, 44, 55);
278 ASSERT (strcmp (result, "0x1.cp+0 33") == 0
279 || strcmp (result, "0x3.8p-1 33") == 0
280 || strcmp (result, "0x7p-2 33") == 0
281 || strcmp (result, "0xep-3 33") == 0);
282 ASSERT (retval == strlen (result));
285 { /* FLAG_SHOWSIGN. */
288 my_snprintf (result, sizeof (result), "%+a %d", 1.75, 33, 44, 55);
289 ASSERT (strcmp (result, "+0x1.cp+0 33") == 0
290 || strcmp (result, "+0x3.8p-1 33") == 0
291 || strcmp (result, "+0x7p-2 33") == 0
292 || strcmp (result, "+0xep-3 33") == 0);
293 ASSERT (retval == strlen (result));
299 my_snprintf (result, sizeof (result), "% a %d", 1.75, 33, 44, 55);
300 ASSERT (strcmp (result, " 0x1.cp+0 33") == 0
301 || strcmp (result, " 0x3.8p-1 33") == 0
302 || strcmp (result, " 0x7p-2 33") == 0
303 || strcmp (result, " 0xep-3 33") == 0);
304 ASSERT (retval == strlen (result));
310 my_snprintf (result, sizeof (result), "%#a %d", 1.75, 33, 44, 55);
311 ASSERT (strcmp (result, "0x1.cp+0 33") == 0
312 || strcmp (result, "0x3.8p-1 33") == 0
313 || strcmp (result, "0x7.p-2 33") == 0
314 || strcmp (result, "0xe.p-3 33") == 0);
315 ASSERT (retval == strlen (result));
321 my_snprintf (result, sizeof (result), "%#a %d", 1.0, 33, 44, 55);
322 ASSERT (strcmp (result, "0x1.p+0 33") == 0
323 || strcmp (result, "0x2.p-1 33") == 0
324 || strcmp (result, "0x4.p-2 33") == 0
325 || strcmp (result, "0x8.p-3 33") == 0);
326 ASSERT (retval == strlen (result));
329 { /* FLAG_ZERO with finite number. */
332 my_snprintf (result, sizeof (result), "%010a %d", 1.75, 33, 44, 55);
333 ASSERT (strcmp (result, "0x001.cp+0 33") == 0
334 || strcmp (result, "0x003.8p-1 33") == 0
335 || strcmp (result, "0x00007p-2 33") == 0
336 || strcmp (result, "0x0000ep-3 33") == 0);
337 ASSERT (retval == strlen (result));
340 { /* FLAG_ZERO with infinite number. */
343 my_snprintf (result, sizeof (result), "%010a %d", 1.0 / 0.0, 33, 44, 55);
344 ASSERT (strcmp (result, " inf 33") == 0
345 || strcmp (result, "0000000inf 33") == 0);
346 ASSERT (retval == strlen (result));
349 { /* FLAG_ZERO with NaN. */
352 my_snprintf (result, sizeof (result), "%010a %d", NaN (), 33, 44, 55);
353 ASSERT (strcmp (result, " nan 33") == 0
354 || strcmp (result, "0000000nan 33") == 0);
355 ASSERT (retval == strlen (result));
360 { /* A positive number. */
363 my_snprintf (result, sizeof (result), "%La %d", 3.1416015625L, 33, 44, 55);
364 ASSERT (strcmp (result, "0x1.922p+1 33") == 0
365 || strcmp (result, "0x3.244p+0 33") == 0
366 || strcmp (result, "0x6.488p-1 33") == 0
367 || strcmp (result, "0xc.91p-2 33") == 0);
368 ASSERT (retval == strlen (result));
371 { /* A negative number. */
374 my_snprintf (result, sizeof (result), "%LA %d", -3.1416015625L, 33, 44, 55);
375 ASSERT (strcmp (result, "-0X1.922P+1 33") == 0
376 || strcmp (result, "-0X3.244P+0 33") == 0
377 || strcmp (result, "-0X6.488P-1 33") == 0
378 || strcmp (result, "-0XC.91P-2 33") == 0);
379 ASSERT (retval == strlen (result));
382 { /* Positive zero. */
385 my_snprintf (result, sizeof (result), "%La %d", 0.0L, 33, 44, 55);
386 ASSERT (strcmp (result, "0x0p+0 33") == 0);
387 ASSERT (retval == strlen (result));
390 { /* Negative zero. */
393 my_snprintf (result, sizeof (result), "%La %d", -0.0L, 33, 44, 55);
394 ASSERT (strcmp (result, "-0x0p+0 33") == 0);
395 ASSERT (retval == strlen (result));
398 { /* Positive infinity. */
401 my_snprintf (result, sizeof (result), "%La %d", 1.0L / 0.0L, 33, 44, 55);
402 ASSERT (strcmp (result, "inf 33") == 0);
403 ASSERT (retval == strlen (result));
406 { /* Negative infinity. */
409 my_snprintf (result, sizeof (result), "%La %d", -1.0L / 0.0L, 33, 44, 55);
410 ASSERT (strcmp (result, "-inf 33") == 0);
411 ASSERT (retval == strlen (result));
417 my_snprintf (result, sizeof (result), "%La %d", 0.0L / 0.0L, 33, 44, 55);
418 ASSERT (strcmp (result, "nan 33") == 0);
419 ASSERT (retval == strlen (result));
422 { /* Rounding near the decimal point. */
425 my_snprintf (result, sizeof (result), "%.0La %d", 1.5L, 33, 44, 55);
426 ASSERT (strcmp (result, "0x2p+0 33") == 0
427 || strcmp (result, "0x3p-1 33") == 0
428 || strcmp (result, "0x6p-2 33") == 0
429 || strcmp (result, "0xcp-3 33") == 0);
430 ASSERT (retval == strlen (result));
433 { /* Rounding with precision 0. */
436 my_snprintf (result, sizeof (result), "%.0La %d", 1.51L, 33, 44, 55);
437 ASSERT (strcmp (result, "0x2p+0 33") == 0
438 || strcmp (result, "0x3p-1 33") == 0
439 || strcmp (result, "0x6p-2 33") == 0
440 || strcmp (result, "0xcp-3 33") == 0);
441 ASSERT (retval == strlen (result));
444 { /* Rounding with precision 1. */
447 my_snprintf (result, sizeof (result), "%.1La %d", 1.51L, 33, 44, 55);
448 ASSERT (strcmp (result, "0x1.8p+0 33") == 0
449 || strcmp (result, "0x3.0p-1 33") == 0
450 || strcmp (result, "0x6.1p-2 33") == 0
451 || strcmp (result, "0xc.1p-3 33") == 0);
452 ASSERT (retval == strlen (result));
455 { /* Rounding with precision 2. */
458 my_snprintf (result, sizeof (result), "%.2La %d", 1.51L, 33, 44, 55);
459 ASSERT (strcmp (result, "0x1.83p+0 33") == 0
460 || strcmp (result, "0x3.05p-1 33") == 0
461 || strcmp (result, "0x6.0ap-2 33") == 0
462 || strcmp (result, "0xc.14p-3 33") == 0);
463 ASSERT (retval == strlen (result));
466 { /* Rounding with precision 3. */
469 my_snprintf (result, sizeof (result), "%.3La %d", 1.51L, 33, 44, 55);
470 ASSERT (strcmp (result, "0x1.829p+0 33") == 0
471 || strcmp (result, "0x3.052p-1 33") == 0
472 || strcmp (result, "0x6.0a4p-2 33") == 0
473 || strcmp (result, "0xc.148p-3 33") == 0);
474 ASSERT (retval == strlen (result));
477 { /* Rounding can turn a ...FFF into a ...000. */
480 my_snprintf (result, sizeof (result), "%.3La %d", 1.49999L, 33, 44, 55);
481 ASSERT (strcmp (result, "0x1.800p+0 33") == 0
482 || strcmp (result, "0x3.000p-1 33") == 0
483 || strcmp (result, "0x6.000p-2 33") == 0
484 || strcmp (result, "0xc.000p-3 33") == 0);
485 ASSERT (retval == strlen (result));
488 { /* Rounding can turn a ...FFF into a ...000.
489 This shows a MacOS X 10.3.9 (Darwin 7.9) bug and a
490 glibc 2.4 bug <http://sourceware.org/bugzilla/show_bug.cgi?id=2908>. */
493 my_snprintf (result, sizeof (result), "%.1La %d", 1.999L, 33, 44, 55);
494 ASSERT (strcmp (result, "0x1.0p+1 33") == 0
495 || strcmp (result, "0x2.0p+0 33") == 0
496 || strcmp (result, "0x4.0p-1 33") == 0
497 || strcmp (result, "0x8.0p-2 33") == 0);
498 ASSERT (retval == strlen (result));
504 my_snprintf (result, sizeof (result), "%10La %d", 1.75L, 33, 44, 55);
505 ASSERT (strcmp (result, " 0x1.cp+0 33") == 0
506 || strcmp (result, " 0x3.8p-1 33") == 0
507 || strcmp (result, " 0x7p-2 33") == 0
508 || strcmp (result, " 0xep-3 33") == 0);
509 ASSERT (retval == strlen (result));
512 { /* Small precision. */
515 my_snprintf (result, sizeof (result), "%.10La %d", 1.75L, 33, 44, 55);
516 ASSERT (strcmp (result, "0x1.c000000000p+0 33") == 0
517 || strcmp (result, "0x3.8000000000p-1 33") == 0
518 || strcmp (result, "0x7.0000000000p-2 33") == 0
519 || strcmp (result, "0xe.0000000000p-3 33") == 0);
520 ASSERT (retval == strlen (result));
523 { /* Large precision. */
526 my_snprintf (result, sizeof (result), "%.50La %d", 1.75L, 33, 44, 55);
527 ASSERT (strcmp (result, "0x1.c0000000000000000000000000000000000000000000000000p+0 33") == 0
528 || strcmp (result, "0x3.80000000000000000000000000000000000000000000000000p-1 33") == 0
529 || strcmp (result, "0x7.00000000000000000000000000000000000000000000000000p-2 33") == 0
530 || strcmp (result, "0xe.00000000000000000000000000000000000000000000000000p-3 33") == 0);
531 ASSERT (retval == strlen (result));
537 my_snprintf (result, sizeof (result), "%-10La %d", 1.75L, 33, 44, 55);
538 ASSERT (strcmp (result, "0x1.cp+0 33") == 0
539 || strcmp (result, "0x3.8p-1 33") == 0
540 || strcmp (result, "0x7p-2 33") == 0
541 || strcmp (result, "0xep-3 33") == 0);
542 ASSERT (retval == strlen (result));
545 { /* FLAG_SHOWSIGN. */
548 my_snprintf (result, sizeof (result), "%+La %d", 1.75L, 33, 44, 55);
549 ASSERT (strcmp (result, "+0x1.cp+0 33") == 0
550 || strcmp (result, "+0x3.8p-1 33") == 0
551 || strcmp (result, "+0x7p-2 33") == 0
552 || strcmp (result, "+0xep-3 33") == 0);
553 ASSERT (retval == strlen (result));
559 my_snprintf (result, sizeof (result), "% La %d", 1.75L, 33, 44, 55);
560 ASSERT (strcmp (result, " 0x1.cp+0 33") == 0
561 || strcmp (result, " 0x3.8p-1 33") == 0
562 || strcmp (result, " 0x7p-2 33") == 0
563 || strcmp (result, " 0xep-3 33") == 0);
564 ASSERT (retval == strlen (result));
570 my_snprintf (result, sizeof (result), "%#La %d", 1.75L, 33, 44, 55);
571 ASSERT (strcmp (result, "0x1.cp+0 33") == 0
572 || strcmp (result, "0x3.8p-1 33") == 0
573 || strcmp (result, "0x7.p-2 33") == 0
574 || strcmp (result, "0xe.p-3 33") == 0);
575 ASSERT (retval == strlen (result));
581 my_snprintf (result, sizeof (result), "%#La %d", 1.0L, 33, 44, 55);
582 ASSERT (strcmp (result, "0x1.p+0 33") == 0
583 || strcmp (result, "0x2.p-1 33") == 0
584 || strcmp (result, "0x4.p-2 33") == 0
585 || strcmp (result, "0x8.p-3 33") == 0);
586 ASSERT (retval == strlen (result));
589 { /* FLAG_ZERO with finite number. */
592 my_snprintf (result, sizeof (result), "%010La %d", 1.75L, 33, 44, 55);
593 ASSERT (strcmp (result, "0x001.cp+0 33") == 0
594 || strcmp (result, "0x003.8p-1 33") == 0
595 || strcmp (result, "0x00007p-2 33") == 0
596 || strcmp (result, "0x0000ep-3 33") == 0);
597 ASSERT (retval == strlen (result));
600 { /* FLAG_ZERO with infinite number. */
603 my_snprintf (result, sizeof (result), "%010La %d", 1.0L / 0.0L, 33, 44, 55);
604 ASSERT (strcmp (result, " inf 33") == 0
605 || strcmp (result, "0000000inf 33") == 0);
606 ASSERT (retval == strlen (result));
609 { /* FLAG_ZERO with NaN. */
612 my_snprintf (result, sizeof (result), "%010La %d", 0.0L / 0.0L, 33, 44, 55);
613 ASSERT (strcmp (result, " nan 33") == 0
614 || strcmp (result, "0000000nan 33") == 0);
615 ASSERT (retval == strlen (result));
620 /* Test the support of the %n format directive. */
626 my_snprintf (result, sizeof (result), "%d %n", 123, &count, 33, 44, 55);
627 ASSERT (strcmp (result, "123 ") == 0);
628 ASSERT (retval == strlen (result));
632 /* Test the support of the POSIX/XSI format strings with positions. */
637 my_snprintf (result, sizeof (result), "%2$d %1$d", 33, 55);
638 ASSERT (strcmp (result, "55 33") == 0);
639 ASSERT (retval == strlen (result));