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. */
21 test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
26 /* Test return value convention. */
28 for (size = 0; size <= 8; size++)
32 memcpy (buf, "DEADBEEF", 8);
33 retval = my_snprintf (buf, size, "%d", 12345);
39 ASSERT (memcmp (buf, "12345", size - 1) == 0);
40 ASSERT (buf[size - 1] == '\0');
42 ASSERT (memcmp (buf + size, "DEADBEEF" + size, 8 - size) == 0);
46 ASSERT (memcmp (buf, "12345\0EF", 8) == 0);
50 /* Test support of size specifiers as in C99. */
55 my_snprintf (result, sizeof (result), "%ju %d", (uintmax_t) 12345671, 33, 44, 55);
56 ASSERT (strcmp (result, "12345671 33") == 0);
57 ASSERT (retval == strlen (result));
63 my_snprintf (result, sizeof (result), "%zu %d", (size_t) 12345672, 33, 44, 55);
64 ASSERT (strcmp (result, "12345672 33") == 0);
65 ASSERT (retval == strlen (result));
71 my_snprintf (result, sizeof (result), "%tu %d", (ptrdiff_t) 12345673, 33, 44, 55);
72 ASSERT (strcmp (result, "12345673 33") == 0);
73 ASSERT (retval == strlen (result));
80 my_snprintf (result, sizeof (result), "%Lg %d", (long double) 1.5, 33, 44, 55);
81 ASSERT (strcmp (result, "1.5 33") == 0);
82 ASSERT (retval == strlen (result));
86 /* Test the support of the 'a' and 'A' conversion specifier for hexadecimal
87 output of floating-point numbers. */
89 { /* A positive number. */
92 my_snprintf (result, sizeof (result), "%a %d", 3.1416015625, 33, 44, 55);
93 ASSERT (strcmp (result, "0x1.922p+1 33") == 0
94 || strcmp (result, "0x3.244p+0 33") == 0
95 || strcmp (result, "0x6.488p-1 33") == 0
96 || strcmp (result, "0xc.91p-2 33") == 0);
97 ASSERT (retval == strlen (result));
100 { /* A negative number. */
103 my_snprintf (result, sizeof (result), "%A %d", -3.1416015625, 33, 44, 55);
104 ASSERT (strcmp (result, "-0X1.922P+1 33") == 0
105 || strcmp (result, "-0X3.244P+0 33") == 0
106 || strcmp (result, "-0X6.488P-1 33") == 0
107 || strcmp (result, "-0XC.91P-2 33") == 0);
108 ASSERT (retval == strlen (result));
111 { /* Positive zero. */
114 my_snprintf (result, sizeof (result), "%a %d", 0.0, 33, 44, 55);
115 ASSERT (strcmp (result, "0x0p+0 33") == 0);
116 ASSERT (retval == strlen (result));
119 { /* Negative zero. */
122 my_snprintf (result, sizeof (result), "%a %d", -0.0, 33, 44, 55);
123 ASSERT (strcmp (result, "-0x0p+0 33") == 0);
124 ASSERT (retval == strlen (result));
127 { /* Positive infinity. */
130 my_snprintf (result, sizeof (result), "%a %d", 1.0 / 0.0, 33, 44, 55);
131 ASSERT (strcmp (result, "inf 33") == 0);
132 ASSERT (retval == strlen (result));
135 { /* Negative infinity. */
138 my_snprintf (result, sizeof (result), "%a %d", -1.0 / 0.0, 33, 44, 55);
139 ASSERT (strcmp (result, "-inf 33") == 0);
140 ASSERT (retval == strlen (result));
146 my_snprintf (result, sizeof (result), "%a %d", 0.0 / 0.0, 33, 44, 55);
147 ASSERT (strcmp (result, "nan 33") == 0);
148 ASSERT (retval == strlen (result));
151 { /* Rounding near the decimal point. */
154 my_snprintf (result, sizeof (result), "%.0a %d", 1.5, 33, 44, 55);
155 ASSERT (strcmp (result, "0x2p+0 33") == 0
156 || strcmp (result, "0x3p-1 33") == 0
157 || strcmp (result, "0x6p-2 33") == 0
158 || strcmp (result, "0xcp-3 33") == 0);
159 ASSERT (retval == strlen (result));
162 { /* Rounding with precision 0. */
165 my_snprintf (result, sizeof (result), "%.0a %d", 1.51, 33, 44, 55);
166 ASSERT (strcmp (result, "0x2p+0 33") == 0
167 || strcmp (result, "0x3p-1 33") == 0
168 || strcmp (result, "0x6p-2 33") == 0
169 || strcmp (result, "0xcp-3 33") == 0);
170 ASSERT (retval == strlen (result));
173 { /* Rounding with precision 1. */
176 my_snprintf (result, sizeof (result), "%.1a %d", 1.51, 33, 44, 55);
177 ASSERT (strcmp (result, "0x1.8p+0 33") == 0
178 || strcmp (result, "0x3.0p-1 33") == 0
179 || strcmp (result, "0x6.1p-2 33") == 0
180 || strcmp (result, "0xc.1p-3 33") == 0);
181 ASSERT (retval == strlen (result));
184 { /* Rounding with precision 2. */
187 my_snprintf (result, sizeof (result), "%.2a %d", 1.51, 33, 44, 55);
188 ASSERT (strcmp (result, "0x1.83p+0 33") == 0
189 || strcmp (result, "0x3.05p-1 33") == 0
190 || strcmp (result, "0x6.0ap-2 33") == 0
191 || strcmp (result, "0xc.14p-3 33") == 0);
192 ASSERT (retval == strlen (result));
195 { /* Rounding with precision 3. */
198 my_snprintf (result, sizeof (result), "%.3a %d", 1.51, 33, 44, 55);
199 ASSERT (strcmp (result, "0x1.829p+0 33") == 0
200 || strcmp (result, "0x3.052p-1 33") == 0
201 || strcmp (result, "0x6.0a4p-2 33") == 0
202 || strcmp (result, "0xc.148p-3 33") == 0);
203 ASSERT (retval == strlen (result));
206 { /* Rounding can turn a ...FFF into a ...000. */
209 my_snprintf (result, sizeof (result), "%.3a %d", 1.49999, 33, 44, 55);
210 ASSERT (strcmp (result, "0x1.800p+0 33") == 0
211 || strcmp (result, "0x3.000p-1 33") == 0
212 || strcmp (result, "0x6.000p-2 33") == 0
213 || strcmp (result, "0xc.000p-3 33") == 0);
214 ASSERT (retval == strlen (result));
217 { /* Rounding can turn a ...FFF into a ...000.
218 This shows a MacOS X 10.3.9 (Darwin 7.9) bug. */
221 my_snprintf (result, sizeof (result), "%.1a %d", 1.999, 33, 44, 55);
222 ASSERT (strcmp (result, "0x1.0p+1 33") == 0
223 || strcmp (result, "0x2.0p+0 33") == 0
224 || strcmp (result, "0x4.0p-1 33") == 0
225 || strcmp (result, "0x8.0p-2 33") == 0);
226 ASSERT (retval == strlen (result));
232 my_snprintf (result, sizeof (result), "%10a %d", 1.75, 33, 44, 55);
233 ASSERT (strcmp (result, " 0x1.cp+0 33") == 0
234 || strcmp (result, " 0x3.8p-1 33") == 0
235 || strcmp (result, " 0x7p-2 33") == 0
236 || strcmp (result, " 0xep-3 33") == 0);
237 ASSERT (retval == strlen (result));
240 { /* Small precision. */
243 my_snprintf (result, sizeof (result), "%.10a %d", 1.75, 33, 44, 55);
244 ASSERT (strcmp (result, "0x1.c000000000p+0 33") == 0
245 || strcmp (result, "0x3.8000000000p-1 33") == 0
246 || strcmp (result, "0x7.0000000000p-2 33") == 0
247 || strcmp (result, "0xe.0000000000p-3 33") == 0);
248 ASSERT (retval == strlen (result));
251 { /* Large precision. */
254 my_snprintf (result, sizeof (result), "%.50a %d", 1.75, 33, 44, 55);
255 ASSERT (strcmp (result, "0x1.c0000000000000000000000000000000000000000000000000p+0 33") == 0
256 || strcmp (result, "0x3.80000000000000000000000000000000000000000000000000p-1 33") == 0
257 || strcmp (result, "0x7.00000000000000000000000000000000000000000000000000p-2 33") == 0
258 || strcmp (result, "0xe.00000000000000000000000000000000000000000000000000p-3 33") == 0);
259 ASSERT (retval == strlen (result));
265 my_snprintf (result, sizeof (result), "%-10a %d", 1.75, 33, 44, 55);
266 ASSERT (strcmp (result, "0x1.cp+0 33") == 0
267 || strcmp (result, "0x3.8p-1 33") == 0
268 || strcmp (result, "0x7p-2 33") == 0
269 || strcmp (result, "0xep-3 33") == 0);
270 ASSERT (retval == strlen (result));
273 { /* FLAG_SHOWSIGN. */
276 my_snprintf (result, sizeof (result), "%+a %d", 1.75, 33, 44, 55);
277 ASSERT (strcmp (result, "+0x1.cp+0 33") == 0
278 || strcmp (result, "+0x3.8p-1 33") == 0
279 || strcmp (result, "+0x7p-2 33") == 0
280 || strcmp (result, "+0xep-3 33") == 0);
281 ASSERT (retval == strlen (result));
287 my_snprintf (result, sizeof (result), "% a %d", 1.75, 33, 44, 55);
288 ASSERT (strcmp (result, " 0x1.cp+0 33") == 0
289 || strcmp (result, " 0x3.8p-1 33") == 0
290 || strcmp (result, " 0x7p-2 33") == 0
291 || strcmp (result, " 0xep-3 33") == 0);
292 ASSERT (retval == strlen (result));
298 my_snprintf (result, sizeof (result), "%#a %d", 1.75, 33, 44, 55);
299 ASSERT (strcmp (result, "0x1.cp+0 33") == 0
300 || strcmp (result, "0x3.8p-1 33") == 0
301 || strcmp (result, "0x7.p-2 33") == 0
302 || strcmp (result, "0xe.p-3 33") == 0);
303 ASSERT (retval == strlen (result));
309 my_snprintf (result, sizeof (result), "%#a %d", 1.0, 33, 44, 55);
310 ASSERT (strcmp (result, "0x1.p+0 33") == 0
311 || strcmp (result, "0x2.p-1 33") == 0
312 || strcmp (result, "0x4.p-2 33") == 0
313 || strcmp (result, "0x8.p-3 33") == 0);
314 ASSERT (retval == strlen (result));
317 { /* FLAG_ZERO with finite number. */
320 my_snprintf (result, sizeof (result), "%010a %d", 1.75, 33, 44, 55);
321 ASSERT (strcmp (result, "0x001.cp+0 33") == 0
322 || strcmp (result, "0x003.8p-1 33") == 0
323 || strcmp (result, "0x00007p-2 33") == 0
324 || strcmp (result, "0x0000ep-3 33") == 0);
325 ASSERT (retval == strlen (result));
328 { /* FLAG_ZERO with infinite number. */
331 my_snprintf (result, sizeof (result), "%010a %d", 1.0 / 0.0, 33, 44, 55);
332 ASSERT (strcmp (result, " inf 33") == 0);
333 ASSERT (retval == strlen (result));
336 { /* FLAG_ZERO with NaN. */
339 my_snprintf (result, sizeof (result), "%010a %d", 0.0 / 0.0, 33, 44, 55);
340 ASSERT (strcmp (result, " nan 33") == 0);
341 ASSERT (retval == strlen (result));
346 { /* A positive number. */
349 my_snprintf (result, sizeof (result), "%La %d", 3.1416015625L, 33, 44, 55);
350 ASSERT (strcmp (result, "0x1.922p+1 33") == 0
351 || strcmp (result, "0x3.244p+0 33") == 0
352 || strcmp (result, "0x6.488p-1 33") == 0
353 || strcmp (result, "0xc.91p-2 33") == 0);
354 ASSERT (retval == strlen (result));
357 { /* A negative number. */
360 my_snprintf (result, sizeof (result), "%LA %d", -3.1416015625L, 33, 44, 55);
361 ASSERT (strcmp (result, "-0X1.922P+1 33") == 0
362 || strcmp (result, "-0X3.244P+0 33") == 0
363 || strcmp (result, "-0X6.488P-1 33") == 0
364 || strcmp (result, "-0XC.91P-2 33") == 0);
365 ASSERT (retval == strlen (result));
368 { /* Positive zero. */
371 my_snprintf (result, sizeof (result), "%La %d", 0.0L, 33, 44, 55);
372 ASSERT (strcmp (result, "0x0p+0 33") == 0);
373 ASSERT (retval == strlen (result));
376 { /* Negative zero. */
379 my_snprintf (result, sizeof (result), "%La %d", -0.0L, 33, 44, 55);
380 ASSERT (strcmp (result, "-0x0p+0 33") == 0);
381 ASSERT (retval == strlen (result));
384 { /* Positive infinity. */
387 my_snprintf (result, sizeof (result), "%La %d", 1.0L / 0.0L, 33, 44, 55);
388 ASSERT (strcmp (result, "inf 33") == 0);
389 ASSERT (retval == strlen (result));
392 { /* Negative infinity. */
395 my_snprintf (result, sizeof (result), "%La %d", -1.0L / 0.0L, 33, 44, 55);
396 ASSERT (strcmp (result, "-inf 33") == 0);
397 ASSERT (retval == strlen (result));
403 my_snprintf (result, sizeof (result), "%La %d", 0.0L / 0.0L, 33, 44, 55);
404 ASSERT (strcmp (result, "nan 33") == 0);
405 ASSERT (retval == strlen (result));
408 { /* Rounding near the decimal point. */
411 my_snprintf (result, sizeof (result), "%.0La %d", 1.5L, 33, 44, 55);
412 ASSERT (strcmp (result, "0x2p+0 33") == 0
413 || strcmp (result, "0x3p-1 33") == 0
414 || strcmp (result, "0x6p-2 33") == 0
415 || strcmp (result, "0xcp-3 33") == 0);
416 ASSERT (retval == strlen (result));
419 { /* Rounding with precision 0. */
422 my_snprintf (result, sizeof (result), "%.0La %d", 1.51L, 33, 44, 55);
423 ASSERT (strcmp (result, "0x2p+0 33") == 0
424 || strcmp (result, "0x3p-1 33") == 0
425 || strcmp (result, "0x6p-2 33") == 0
426 || strcmp (result, "0xcp-3 33") == 0);
427 ASSERT (retval == strlen (result));
430 { /* Rounding with precision 1. */
433 my_snprintf (result, sizeof (result), "%.1La %d", 1.51L, 33, 44, 55);
434 ASSERT (strcmp (result, "0x1.8p+0 33") == 0
435 || strcmp (result, "0x3.0p-1 33") == 0
436 || strcmp (result, "0x6.1p-2 33") == 0
437 || strcmp (result, "0xc.1p-3 33") == 0);
438 ASSERT (retval == strlen (result));
441 { /* Rounding with precision 2. */
444 my_snprintf (result, sizeof (result), "%.2La %d", 1.51L, 33, 44, 55);
445 ASSERT (strcmp (result, "0x1.83p+0 33") == 0
446 || strcmp (result, "0x3.05p-1 33") == 0
447 || strcmp (result, "0x6.0ap-2 33") == 0
448 || strcmp (result, "0xc.14p-3 33") == 0);
449 ASSERT (retval == strlen (result));
452 { /* Rounding with precision 3. */
455 my_snprintf (result, sizeof (result), "%.3La %d", 1.51L, 33, 44, 55);
456 ASSERT (strcmp (result, "0x1.829p+0 33") == 0
457 || strcmp (result, "0x3.052p-1 33") == 0
458 || strcmp (result, "0x6.0a4p-2 33") == 0
459 || strcmp (result, "0xc.148p-3 33") == 0);
460 ASSERT (retval == strlen (result));
463 { /* Rounding can turn a ...FFF into a ...000. */
466 my_snprintf (result, sizeof (result), "%.3La %d", 1.49999L, 33, 44, 55);
467 ASSERT (strcmp (result, "0x1.800p+0 33") == 0
468 || strcmp (result, "0x3.000p-1 33") == 0
469 || strcmp (result, "0x6.000p-2 33") == 0
470 || strcmp (result, "0xc.000p-3 33") == 0);
471 ASSERT (retval == strlen (result));
474 { /* Rounding can turn a ...FFF into a ...000.
475 This shows a MacOS X 10.3.9 (Darwin 7.9) bug and a
476 glibc 2.4 bug <http://sourceware.org/bugzilla/show_bug.cgi?id=2908>. */
479 my_snprintf (result, sizeof (result), "%.1La %d", 1.999L, 33, 44, 55);
480 ASSERT (strcmp (result, "0x1.0p+1 33") == 0
481 || strcmp (result, "0x2.0p+0 33") == 0
482 || strcmp (result, "0x4.0p-1 33") == 0
483 || strcmp (result, "0x8.0p-2 33") == 0);
484 ASSERT (retval == strlen (result));
490 my_snprintf (result, sizeof (result), "%10La %d", 1.75L, 33, 44, 55);
491 ASSERT (strcmp (result, " 0x1.cp+0 33") == 0
492 || strcmp (result, " 0x3.8p-1 33") == 0
493 || strcmp (result, " 0x7p-2 33") == 0
494 || strcmp (result, " 0xep-3 33") == 0);
495 ASSERT (retval == strlen (result));
498 { /* Small precision. */
501 my_snprintf (result, sizeof (result), "%.10La %d", 1.75L, 33, 44, 55);
502 ASSERT (strcmp (result, "0x1.c000000000p+0 33") == 0
503 || strcmp (result, "0x3.8000000000p-1 33") == 0
504 || strcmp (result, "0x7.0000000000p-2 33") == 0
505 || strcmp (result, "0xe.0000000000p-3 33") == 0);
506 ASSERT (retval == strlen (result));
509 { /* Large precision. */
512 my_snprintf (result, sizeof (result), "%.50La %d", 1.75L, 33, 44, 55);
513 ASSERT (strcmp (result, "0x1.c0000000000000000000000000000000000000000000000000p+0 33") == 0
514 || strcmp (result, "0x3.80000000000000000000000000000000000000000000000000p-1 33") == 0
515 || strcmp (result, "0x7.00000000000000000000000000000000000000000000000000p-2 33") == 0
516 || strcmp (result, "0xe.00000000000000000000000000000000000000000000000000p-3 33") == 0);
517 ASSERT (retval == strlen (result));
523 my_snprintf (result, sizeof (result), "%-10La %d", 1.75L, 33, 44, 55);
524 ASSERT (strcmp (result, "0x1.cp+0 33") == 0
525 || strcmp (result, "0x3.8p-1 33") == 0
526 || strcmp (result, "0x7p-2 33") == 0
527 || strcmp (result, "0xep-3 33") == 0);
528 ASSERT (retval == strlen (result));
531 { /* FLAG_SHOWSIGN. */
534 my_snprintf (result, sizeof (result), "%+La %d", 1.75L, 33, 44, 55);
535 ASSERT (strcmp (result, "+0x1.cp+0 33") == 0
536 || strcmp (result, "+0x3.8p-1 33") == 0
537 || strcmp (result, "+0x7p-2 33") == 0
538 || strcmp (result, "+0xep-3 33") == 0);
539 ASSERT (retval == strlen (result));
545 my_snprintf (result, sizeof (result), "% La %d", 1.75L, 33, 44, 55);
546 ASSERT (strcmp (result, " 0x1.cp+0 33") == 0
547 || strcmp (result, " 0x3.8p-1 33") == 0
548 || strcmp (result, " 0x7p-2 33") == 0
549 || strcmp (result, " 0xep-3 33") == 0);
550 ASSERT (retval == strlen (result));
556 my_snprintf (result, sizeof (result), "%#La %d", 1.75L, 33, 44, 55);
557 ASSERT (strcmp (result, "0x1.cp+0 33") == 0
558 || strcmp (result, "0x3.8p-1 33") == 0
559 || strcmp (result, "0x7.p-2 33") == 0
560 || strcmp (result, "0xe.p-3 33") == 0);
561 ASSERT (retval == strlen (result));
567 my_snprintf (result, sizeof (result), "%#La %d", 1.0L, 33, 44, 55);
568 ASSERT (strcmp (result, "0x1.p+0 33") == 0
569 || strcmp (result, "0x2.p-1 33") == 0
570 || strcmp (result, "0x4.p-2 33") == 0
571 || strcmp (result, "0x8.p-3 33") == 0);
572 ASSERT (retval == strlen (result));
575 { /* FLAG_ZERO with finite number. */
578 my_snprintf (result, sizeof (result), "%010La %d", 1.75L, 33, 44, 55);
579 ASSERT (strcmp (result, "0x001.cp+0 33") == 0
580 || strcmp (result, "0x003.8p-1 33") == 0
581 || strcmp (result, "0x00007p-2 33") == 0
582 || strcmp (result, "0x0000ep-3 33") == 0);
583 ASSERT (retval == strlen (result));
586 { /* FLAG_ZERO with infinite number. */
589 my_snprintf (result, sizeof (result), "%010La %d", 1.0L / 0.0L, 33, 44, 55);
590 ASSERT (strcmp (result, " inf 33") == 0);
591 ASSERT (retval == strlen (result));
594 { /* FLAG_ZERO with NaN. */
597 my_snprintf (result, sizeof (result), "%010La %d", 0.0L / 0.0L, 33, 44, 55);
598 ASSERT (strcmp (result, " nan 33") == 0);
599 ASSERT (retval == strlen (result));
604 /* Test the support of the %n format directive. */
610 my_snprintf (result, sizeof (result), "%d %n", 123, &count, 33, 44, 55);
611 ASSERT (strcmp (result, "123 ") == 0);
612 ASSERT (retval == strlen (result));
616 /* Test the support of the POSIX/XSI format strings with positions. */
621 my_snprintf (result, sizeof (result), "%2$d %1$d", 33, 55);
622 ASSERT (strcmp (result, "55 33") == 0);
623 ASSERT (retval == strlen (result));