1/* $NetBSD: t_printf.c,v 1.18 2024/05/11 14:39:53 riastradh Exp $ */
2
3/*-
4 * Copyright (c) 2010 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/types.h>
30#include <sys/resource.h>
31
32#include <atf-c.h>
33#include <errno.h>
34#include <float.h>
35#include <math.h>
36#include <stdint.h>
37#include <stdio.h>
38#include <stdlib.h>
39#include <string.h>
40#include <time.h>
41
42ATF_TC(snprintf_c99);
43ATF_TC_HEAD(snprintf_c99, tc)
44{
45
46	atf_tc_set_md_var(tc, "descr",
47	    "Test printf(3) C99 conformance (PR lib/22019)");
48}
49
50ATF_TC_BODY(snprintf_c99, tc)
51{
52	char s[4];
53
54	(void)memset(s, '\0', sizeof(s));
55	(void)snprintf(s, sizeof(s), "%#.o", 0);
56	(void)printf("printf = %#.o\n", 0);
57	(void)fprintf(stderr, "snprintf = %s", s);
58
59	ATF_REQUIRE(strlen(s) == 1);
60	ATF_REQUIRE(s[0] == '0');
61}
62
63ATF_TC(snprintf_dotzero);
64ATF_TC_HEAD(snprintf_dotzero, tc)
65{
66
67	atf_tc_set_md_var(tc, "descr",
68	    "PR lib/32951: %%.0f formats (0.0,0.5] to \"0.\"");
69}
70
71ATF_TC_BODY(snprintf_dotzero, tc)
72{
73	char s[4];
74
75	ATF_CHECK(snprintf(s, sizeof(s), "%.0f", 0.1) == 1);
76	ATF_REQUIRE_STREQ(s, "0");
77}
78
79ATF_TC(snprintf_posarg);
80ATF_TC_HEAD(snprintf_posarg, tc)
81{
82
83	atf_tc_set_md_var(tc, "descr", "test for positional arguments");
84}
85
86ATF_TC_BODY(snprintf_posarg, tc)
87{
88	char s[16];
89
90	ATF_CHECK(snprintf(s, sizeof(s), "%1$d", -23) == 3);
91	ATF_REQUIRE_STREQ(s, "-23");
92}
93
94ATF_TC(snprintf_posarg_width);
95ATF_TC_HEAD(snprintf_posarg_width, tc)
96{
97
98	atf_tc_set_md_var(tc, "descr", "test for positional arguments with "
99	    "field width");
100}
101
102ATF_TC_BODY(snprintf_posarg_width, tc)
103{
104	char s[16];
105
106	ATF_CHECK(snprintf(s, sizeof(s), "%1$*2$d", -23, 4) == 4);
107	ATF_REQUIRE_STREQ(s, " -23");
108}
109
110ATF_TC(snprintf_posarg_error);
111ATF_TC_HEAD(snprintf_posarg_error, tc)
112{
113
114	atf_tc_set_md_var(tc, "descr", "test for positional arguments out "
115	    "of bounds");
116}
117
118ATF_TC_BODY(snprintf_posarg_error, tc)
119{
120	char s[16], fmt[32];
121
122	snprintf(fmt, sizeof(fmt), "%%%zu$d", SIZE_MAX / sizeof(size_t));
123
124	ATF_CHECK(snprintf(s, sizeof(s), fmt, -23) == -1);
125}
126
127ATF_TC(snprintf_float);
128ATF_TC_HEAD(snprintf_float, tc)
129{
130
131	atf_tc_set_md_var(tc, "descr", "test that floating conversions don't"
132	    " leak memory");
133}
134
135ATF_TC_BODY(snprintf_float, tc)
136{
137	union {
138		double d;
139		uint64_t bits;
140	} u;
141	uint32_t ul, uh;
142	time_t now;
143	char buf[1000];
144	struct rlimit rl;
145
146	rl.rlim_cur = rl.rlim_max = 1 * 1024 * 1024;
147	ATF_CHECK(setrlimit(RLIMIT_AS, &rl) != -1);
148	rl.rlim_cur = rl.rlim_max = 1 * 1024 * 1024;
149	ATF_CHECK(setrlimit(RLIMIT_DATA, &rl) != -1);
150
151	time(&now);
152	srand(now);
153	for (size_t i = 0; i < 10000; i++) {
154		ul = rand();
155		uh = rand();
156		u.bits = (uint64_t)uh << 32 | ul;
157		ATF_CHECK(snprintf(buf, sizeof buf, " %.2f", u.d) != -1);
158	}
159}
160
161ATF_TC(sprintf_zeropad);
162ATF_TC_HEAD(sprintf_zeropad, tc)
163{
164	atf_tc_set_md_var(tc, "descr",
165	    "Test output format zero padding (PR lib/44113)");
166}
167
168ATF_TC_BODY(sprintf_zeropad, tc)
169{
170	char str[1024];
171
172	ATF_CHECK(sprintf(str, "%010f", 0.0) == 10);
173	ATF_REQUIRE_STREQ(str, "000.000000");
174
175	/* ieeefp */
176#ifndef __vax__
177	/* printf(3) should ignore zero padding for nan/inf */
178	ATF_CHECK(sprintf(str, "%010f", NAN) == 10);
179	ATF_REQUIRE_STREQ(str, "       nan");
180	ATF_CHECK(sprintf(str, "%010f", INFINITY) == 10);
181	ATF_REQUIRE_STREQ(str, "       inf");
182#endif
183}
184
185ATF_TC(snprintf_double_a);
186ATF_TC_HEAD(snprintf_double_a, tc)
187{
188	atf_tc_set_md_var(tc, "descr", "Test printf a format");
189}
190
191ATF_TC_BODY(snprintf_double_a, tc)
192{
193	char buf[1000];
194
195	snprintf(buf, sizeof buf, "%.3a", (double)10.6);
196	ATF_CHECK_MSG((strcmp(buf, "0x1.533p+3") == 0 ||
197		strcmp(buf, "0x2.a66p+2") == 0 ||
198		strcmp(buf, "0x5.4cdp+1") == 0 ||
199		strcmp(buf, "0xa.99ap+0") == 0),
200	    "buf=%s", buf);
201
202	snprintf(buf, sizeof buf, "%a", (double)0.125);
203	ATF_CHECK_MSG((strcmp(buf, "0x1p-3") == 0 ||
204		strcmp(buf, "0x2p-4") == 0 ||
205		strcmp(buf, "0x4p-5") == 0 ||
206		strcmp(buf, "0x8p-6") == 0),
207	    "buf=%s", buf);
208}
209
210ATF_TC(snprintf_long_double_a);
211ATF_TC_HEAD(snprintf_long_double_a, tc)
212{
213	atf_tc_set_md_var(tc, "descr", "Test printf La format");
214}
215
216ATF_TC_BODY(snprintf_long_double_a, tc)
217{
218	char buf[1000];
219
220	snprintf(buf, sizeof buf, "%.3La", 10.6L);
221	ATF_CHECK_MSG((strcmp(buf, "0x1.533p+3") == 0 ||
222		strcmp(buf, "0x2.a66p+2") == 0 ||
223		strcmp(buf, "0x5.4cdp+1") == 0 ||
224		strcmp(buf, "0xa.99ap+0") == 0),
225	    "buf=%s", buf);
226
227	snprintf(buf, sizeof buf, "%La", 0.125L);
228	ATF_CHECK_MSG((strcmp(buf, "0x1p-3") == 0 ||
229		strcmp(buf, "0x2p-4") == 0 ||
230		strcmp(buf, "0x4p-5") == 0 ||
231		strcmp(buf, "0x8p-6") == 0),
232	    "buf=%s", buf);
233
234	/*
235	 * Test case adapted from:
236	 *
237	 * https://mail-index.netbsd.org/tech-userlevel/2020/04/11/msg012329.html
238	 */
239#if LDBL_MAX_EXP >= 16384 && LDBL_MANT_DIG >= 64
240	snprintf(buf, sizeof buf, "%La", -0xc.ecececececececep+3788L);
241	ATF_CHECK_MSG((strcmp(buf, "-0x1.9d9d9d9d9d9d9d9cp+3791") == 0 ||
242		strcmp(buf, "-0x3.3b3b3b3b3b3b3b38p+3790") == 0 ||
243		strcmp(buf, "-0x6.7676767676767674p+3789") == 0 ||
244		strcmp(buf, "-0xc.ecececececececep+3788") == 0),
245	    "buf=%s", buf);
246#endif
247
248#if LDBL_MAX_EXP >= 16384 && LDBL_MANT_DIG >= 113
249	snprintf(buf, sizeof buf, "%La",
250	    -0x1.cecececececececececececececep+3791L);
251	ATF_CHECK_MSG((strcmp(buf,
252		    "-0x1.cecececececececececececececep+3791") == 0 ||
253		strcmp(buf, "-0x3.3333333333333338p+3790") == 0 ||
254		strcmp(buf, "-0x6.767676767676767p+3789") == 0 ||
255		strcmp(buf, "-0xc.ecececececececep+3788") == 0),
256	    "buf=%s", buf);
257#endif
258}
259
260/* is "long double" and "double" different? */
261#if (__LDBL_MANT_DIG__ != __DBL_MANT_DIG__) || \
262    (__LDBL_MAX_EXP__ != __DBL_MAX_EXP__)
263#define WIDE_DOUBLE
264#endif
265
266#ifndef WIDE_DOUBLE
267ATF_TC(pr57250_fix);
268ATF_TC_HEAD(pr57250_fix, tc)
269{
270	atf_tc_set_md_var(tc, "descr", "Test for PR57250");
271}
272
273ATF_TC_BODY(pr57250_fix, tc)
274{
275	char *eptr;
276	char buf[1000];
277	long double ld;
278
279	errno = 0;
280	ld = strtold("1e309", &eptr);
281	ATF_CHECK(errno != 0);
282	ld = (double)ld;
283	ATF_CHECK(isfinite(ld) == 0);
284	snprintf(buf, sizeof buf, "%Lf\n", ld);
285	ATF_REQUIRE_STREQ(buf, "inf\n");
286}
287#endif
288
289
290ATF_TP_ADD_TCS(tp)
291{
292
293	ATF_TP_ADD_TC(tp, snprintf_c99);
294	ATF_TP_ADD_TC(tp, snprintf_dotzero);
295	ATF_TP_ADD_TC(tp, snprintf_posarg);
296	ATF_TP_ADD_TC(tp, snprintf_posarg_width);
297	ATF_TP_ADD_TC(tp, snprintf_posarg_error);
298	ATF_TP_ADD_TC(tp, snprintf_float);
299	ATF_TP_ADD_TC(tp, sprintf_zeropad);
300	ATF_TP_ADD_TC(tp, snprintf_double_a);
301	ATF_TP_ADD_TC(tp, snprintf_long_double_a);
302#ifndef WIDE_DOUBLE
303	ATF_TP_ADD_TC(tp, pr57250_fix);
304#endif
305
306	return atf_no_error();
307}
308