1 /*-
2 * Copyright (C) 2003, 2005 David Schultz <[email protected]>
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))
45 static int
_eq(long double epsilon,long double a,long double b)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
54 ATF_TC_WITHOUT_HEAD(normalized_numbers);
ATF_TC_BODY(normalized_numbers,tc)55 ATF_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
152 ATF_TC_WITHOUT_HEAD(infinities_and_nans);
ATF_TC_BODY(infinities_and_nans,tc)153 ATF_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
203 ATF_TC_WITHOUT_HEAD(rounding_tests);
ATF_TC_BODY(rounding_tests,tc)204 ATF_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
282 ATF_TC_WITHOUT_HEAD(strtod);
ATF_TC_BODY(strtod,tc)283 ATF_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
ATF_TP_ADD_TCS(tp)307 ATF_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