1/*-
2 * Copyright (C) 2003, 2005 David Schultz <das@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27/*
28 * Test for scanf() floating point formats.
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD$");
33
34#include <fenv.h>
35#include <float.h>
36#include <locale.h>
37#include <math.h>
38#include <stdio.h>
39#include <stdlib.h>
40#include <string.h>
41
42#include <atf-c.h>
43
44#define	eq(type, a, b)	_eq(type##_EPSILON, (a), (b))
45static int
46_eq(long double epsilon, long double a, long double b)
47{
48	long double delta;
49
50	delta = fabsl(a - b);
51	return (delta <= epsilon);
52}
53
54ATF_TC_WITHOUT_HEAD(normalized_numbers);
55ATF_TC_BODY(normalized_numbers, tc)
56{
57	char buf[128];
58	long double ld = 0.0;
59	double d = 0.0;
60	float f = 0.0;
61
62	buf[0] = '\0';
63	ATF_REQUIRE(setlocale(LC_NUMERIC, ""));
64
65	sscanf("3.141592", "%e", &f);
66	ATF_REQUIRE(eq(FLT, f, 3.141592));
67
68	sscanf("3.141592653589793", "%lf", &d);
69	ATF_REQUIRE(eq(DBL, d, 3.141592653589793));
70
71	sscanf("1.234568e+06", "%E", &f);
72	ATF_REQUIRE(eq(FLT, f, 1.234568e+06));
73
74	sscanf("-1.234568e6", "%lF", &d);
75	ATF_REQUIRE(eq(DBL, d, -1.234568e6));
76
77	sscanf("+1.234568e-52", "%LG", &ld);
78	ATF_REQUIRE(eq(LDBL, ld, 1.234568e-52L));
79
80	sscanf("0.1", "%la", &d);
81	ATF_REQUIRE(eq(DBL, d, 0.1));
82
83	sscanf("00.2", "%lA", &d);
84	ATF_REQUIRE(eq(DBL, d, 0.2));
85
86	sscanf("123456", "%5le%s", &d, buf);
87	ATF_REQUIRE(eq(DBL, d, 12345.));
88	ATF_REQUIRE(strcmp(buf, "6") == 0);
89
90	sscanf("1.0Q", "%*5le%s", buf);
91	ATF_REQUIRE(strcmp(buf, "Q") == 0);
92
93	sscanf("-1.23e", "%e%s", &f, buf);
94	ATF_REQUIRE(eq(FLT, f, -1.23));
95	ATF_REQUIRE(strcmp(buf, "e") == 0);
96
97	sscanf("1.25e+", "%le%s", &d, buf);
98	ATF_REQUIRE(eq(DBL, d, 1.25));
99	ATF_REQUIRE(strcmp(buf, "e+") == 0);
100
101	sscanf("1.23E4E5", "%le%s", &d, buf);
102	ATF_REQUIRE(eq(DBL, d, 1.23e4));
103	ATF_REQUIRE(strcmp(buf, "E5") == 0);
104
105	sscanf("12e6", "%le", &d);
106	ATF_REQUIRE(eq(DBL, d, 12e6));
107
108	sscanf("1.a", "%le%s", &d, buf);
109	ATF_REQUIRE(eq(DBL, d, 1.0));
110	ATF_REQUIRE(strcmp(buf, "a") == 0);
111
112	sscanf(".0p4", "%le%s", &d, buf);
113	ATF_REQUIRE(eq(DBL, d, 0.0));
114	ATF_REQUIRE(strcmp(buf, "p4") == 0);
115
116	d = 0.25;
117	ATF_REQUIRE(sscanf(".", "%le", &d) == 0);
118	ATF_REQUIRE(d == 0.25);
119
120	sscanf("0x08", "%le", &d);
121	ATF_REQUIRE(d == 0x8p0);
122
123	sscanf("0x90a.bcdefP+09a", "%le%s", &d, buf);
124	ATF_REQUIRE(d == 0x90a.bcdefp+09);
125	ATF_REQUIRE(strcmp(buf, "a") == 0);
126
127#if (LDBL_MANT_DIG > DBL_MANT_DIG) && !defined(__i386__)
128	sscanf("3.14159265358979323846", "%Lg", &ld);
129	ATF_REQUIRE(eq(LDBL, ld, 3.14159265358979323846L));
130
131	sscanf("  0X.0123456789abcdefffp-3g", "%Le%s", &ld, buf);
132	ATF_REQUIRE(ld == 0x0.0123456789abcdefffp-3L);
133	ATF_REQUIRE(strcmp(buf, "g") == 0);
134#endif
135
136	sscanf("0xg", "%le%s", &d, buf);
137	ATF_REQUIRE(d == 0.0);
138	ATF_REQUIRE(strcmp(buf, "xg") == 0);
139
140	ATF_REQUIRE(setlocale(LC_NUMERIC, "ru_RU.ISO8859-5")); /* decimalpoint==, */
141
142	sscanf("1.23", "%le%s", &d, buf);
143	ATF_REQUIRE(d == 1.0);
144	ATF_REQUIRE(strcmp(buf, ".23") == 0);
145
146	sscanf("1,23", "%le", &d);
147	ATF_REQUIRE(d == 1.23);
148
149	ATF_REQUIRE(setlocale(LC_NUMERIC, ""));
150}
151
152ATF_TC_WITHOUT_HEAD(infinities_and_nans);
153ATF_TC_BODY(infinities_and_nans, tc)
154{
155	char buf[128];
156	long double ld = 0.0;
157	double d = 0.0;
158	float f = 0.0;
159
160	ATF_REQUIRE(setlocale(LC_NUMERIC, "C"));
161
162	sscanf("-Inf", "%le", &d);
163	ATF_REQUIRE(d < 0.0 && isinf(d));
164
165	sscanf("iNfInItY and beyond", "%le%s", &d, buf);
166	ATF_REQUIRE(d > 0.0 && isinf(d));
167	ATF_REQUIRE(strcmp(buf, " and beyond"));
168
169	sscanf("NaN", "%le", &d);
170	ATF_REQUIRE(isnan(d));
171
172	sscanf("NAN(123Y", "%le%s", &d, buf);
173	ATF_REQUIRE(isnan(d));
174	ATF_REQUIRE(strcmp(buf, "(123Y") == 0);
175
176	sscanf("nan(f00f)plugh", "%le%s", &d, buf);
177	ATF_REQUIRE(isnan(d));
178	ATF_REQUIRE(strcmp(buf, "plugh") == 0);
179
180	sscanf("-nan", "%le", &d);
181	ATF_REQUIRE(isnan(d));
182
183	/* Only quiet NaNs should be returned. */
184	sscanf("NaN", "%e", &f);
185	sscanf("nan", "%le", &d);
186	sscanf("nan", "%Le", &ld);
187	feclearexcept(FE_ALL_EXCEPT);
188	ATF_REQUIRE(f != f);
189	ATF_REQUIRE(d != d);
190	ATF_REQUIRE(ld != ld);
191	ATF_REQUIRE(fetestexcept(FE_INVALID) == 0);
192	sscanf("nan(1234)", "%e", &f);
193	sscanf("nan(1234)", "%le", &d);
194	sscanf("nan(1234)", "%Le", &ld);
195	feclearexcept(FE_ALL_EXCEPT);
196	ATF_REQUIRE(f != f);
197	ATF_REQUIRE(d != d);
198	ATF_REQUIRE(ld != ld);
199	/* POSIX says we should only generate quiet NaNs. */
200	ATF_REQUIRE(fetestexcept(FE_INVALID) == 0);
201}
202
203ATF_TC_WITHOUT_HEAD(rounding_tests);
204ATF_TC_BODY(rounding_tests, tc)
205{
206	long double ld = 0.0;
207	double d = 0.0;
208
209	ATF_REQUIRE(setlocale(LC_NUMERIC, "C"));
210
211	fesetround(FE_DOWNWARD);
212
213	sscanf("1.999999999999999999999999999999999", "%le", &d);
214	ATF_REQUIRE(d < 2.0);
215	sscanf("0x1.ffffffffffffffp0", "%le", &d);
216	ATF_REQUIRE(d < 2.0);
217	sscanf("1.999999999999999999999999999999999", "%Le", &ld);
218	ATF_REQUIRE(ld < 2.0);
219
220	sscanf("1.0571892669084007", "%le", &d);
221	ATF_REQUIRE(d == 0x1.0ea3f4af0dc59p0);
222	sscanf("-1.0571892669084007", "%le", &d);
223	ATF_REQUIRE(d == -0x1.0ea3f4af0dc5ap0);
224	sscanf("1.0571892669084010", "%le", &d);
225	ATF_REQUIRE(d == 0x1.0ea3f4af0dc5ap0);
226
227	sscanf("0x1.23p-5000", "%le", &d);
228	ATF_REQUIRE(d == 0.0);
229
230	sscanf("0x1.2345678p-1050", "%le", &d);
231	ATF_REQUIRE(d == 0x1.234567p-1050);
232
233	fesetround(FE_UPWARD);
234
235	sscanf("1.0571892669084007", "%le", &d);
236	ATF_REQUIRE(d == 0x1.0ea3f4af0dc5ap0);
237	sscanf("-1.0571892669084007", "%le", &d);
238	ATF_REQUIRE(d == -0x1.0ea3f4af0dc59p0);
239	sscanf("1.0571892669084010", "%le", &d);
240	ATF_REQUIRE(d == 0x1.0ea3f4af0dc5bp0);
241
242	sscanf("0x1.23p-5000", "%le", &d);
243	ATF_REQUIRE(d == 0x1p-1074);
244
245	sscanf("0x1.2345678p-1050", "%le", &d);
246	ATF_REQUIRE(d == 0x1.234568p-1050);
247
248	fesetround(FE_TOWARDZERO);
249
250	sscanf("1.0571892669084007", "%le", &d);
251	ATF_REQUIRE(d == 0x1.0ea3f4af0dc59p0);
252	sscanf("-1.0571892669084007", "%le", &d);
253	ATF_REQUIRE(d == -0x1.0ea3f4af0dc59p0);
254	sscanf("1.0571892669084010", "%le", &d);
255	ATF_REQUIRE(d == 0x1.0ea3f4af0dc5ap0);
256
257	sscanf("0x1.23p-5000", "%le", &d);
258	ATF_REQUIRE(d == 0.0);
259
260	sscanf("0x1.2345678p-1050", "%le", &d);
261	ATF_REQUIRE(d == 0x1.234567p-1050);
262
263	fesetround(FE_TONEAREST);
264
265	/* 1.0571892669084007 is slightly closer to 0x1.0ea3f4af0dc59p0 */
266	sscanf("1.0571892669084007", "%le", &d);
267	ATF_REQUIRE(d == 0x1.0ea3f4af0dc59p0);
268	sscanf("-1.0571892669084007", "%le", &d);
269	ATF_REQUIRE(d == -0x1.0ea3f4af0dc59p0);
270	sscanf("1.0571892669084010", "%le", &d);
271	ATF_REQUIRE(d == 0x1.0ea3f4af0dc5bp0);
272
273	/* strtod() should round small numbers to 0. */
274	sscanf("0x1.23p-5000", "%le", &d);
275	ATF_REQUIRE(d == 0.0);
276
277	/* Extra digits in a denormal shouldn't break anything. */
278	sscanf("0x1.2345678p-1050", "%le", &d);
279	ATF_REQUIRE(d == 0x1.234568p-1050);
280}
281
282ATF_TC_WITHOUT_HEAD(strtod);
283ATF_TC_BODY(strtod, tc)
284{
285	char *endp;
286
287	ATF_REQUIRE(setlocale(LC_NUMERIC, "C"));
288
289	ATF_REQUIRE(strtod("0xy", &endp) == 0);
290	ATF_REQUIRE(strcmp("xy", endp) == 0);
291
292	/* This used to cause an infinite loop and round the wrong way. */
293	fesetround(FE_DOWNWARD);
294	ATF_REQUIRE(strtof("3.5e38", &endp) == FLT_MAX);
295	ATF_REQUIRE(strtod("2e308", &endp) == DBL_MAX);
296	fesetround(FE_UPWARD);
297	ATF_REQUIRE(strtof("3.5e38", &endp) == INFINITY);
298	ATF_REQUIRE(strtod("2e308", &endp) == INFINITY);
299	fesetround(FE_TOWARDZERO);
300	ATF_REQUIRE(strtof("3.5e38", &endp) == FLT_MAX);
301	ATF_REQUIRE(strtod("2e308", &endp) == DBL_MAX);
302	fesetround(FE_TONEAREST);
303	ATF_REQUIRE(strtof("3.5e38", &endp) == INFINITY);
304	ATF_REQUIRE(strtod("2e308", &endp) == INFINITY);
305}
306
307ATF_TP_ADD_TCS(tp)
308{
309
310	ATF_TP_ADD_TC(tp, normalized_numbers);
311	ATF_TP_ADD_TC(tp, infinities_and_nans);
312	ATF_TP_ADD_TC(tp, rounding_tests);
313	ATF_TP_ADD_TC(tp, strtod);
314
315	return (atf_no_error());
316}
317