2 * Copyright (C) 2003, 2005 David Schultz <das@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
28 * Test for scanf() floating point formats.
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
42 #define eq(type, a, b) _eq(type##_EPSILON, (a), (b))
43 static int _eq(long double epsilon, long double a, long double b);
45 extern int __scanfdebug;
48 main(int argc, char *argv[])
58 assert(setlocale(LC_NUMERIC, ""));
63 * Various tests for normalized numbers
65 sscanf("3.141592", "%e", &f);
66 assert(eq(FLT, f, 3.141592));
68 sscanf("3.141592653589793", "%lf", &d);
69 assert(eq(DBL, d, 3.141592653589793));
71 sscanf("1.234568e+06", "%E", &f);
72 assert(eq(FLT, f, 1.234568e+06));
74 sscanf("-1.234568e6", "%lF", &d);
75 assert(eq(DBL, d, -1.234568e6));
77 sscanf("+1.234568e-52", "%LG", &ld);
78 assert(eq(LDBL, ld, 1.234568e-52L));
80 sscanf("0.1", "%la", &d);
81 assert(eq(DBL, d, 0.1));
83 sscanf("00.2", "%lA", &d);
84 assert(eq(DBL, d, 0.2));
86 sscanf("123456", "%5le%s", &d, buf);
87 assert(eq(DBL, d, 12345.));
88 assert(strcmp(buf, "6") == 0);
90 sscanf("1.0Q", "%*5le%s", buf);
91 assert(strcmp(buf, "Q") == 0);
93 sscanf("-1.23e", "%e%s", &f, buf);
94 assert(eq(FLT, f, -1.23));
95 assert(strcmp(buf, "e") == 0);
97 sscanf("1.25e+", "%le%s", &d, buf);
98 assert(eq(DBL, d, 1.25));
99 assert(strcmp(buf, "e+") == 0);
101 sscanf("1.23E4E5", "%le%s", &d, buf);
102 assert(eq(DBL, d, 1.23e4));
103 assert(strcmp(buf, "E5") == 0);
105 sscanf("12e6", "%le", &d);
106 assert(eq(DBL, d, 12e6));
108 sscanf("1.a", "%le%s", &d, buf);
109 assert(eq(DBL, d, 1.0));
110 assert(strcmp(buf, "a") == 0);
112 sscanf(".0p4", "%le%s", &d, buf);
113 assert(eq(DBL, d, 0.0));
114 assert(strcmp(buf, "p4") == 0);
117 assert(sscanf(".", "%le", &d) == 0);
120 sscanf("0x08", "%le", &d);
123 sscanf("0x90a.bcdefP+09a", "%le%s", &d, buf);
124 assert(d == 0x90a.bcdefp+09);
125 assert(strcmp(buf, "a") == 0);
127 #if (LDBL_MANT_DIG > DBL_MANT_DIG) && !defined(__i386__)
128 sscanf("3.14159265358979323846", "%Lg", &ld);
129 assert(eq(LDBL, ld, 3.14159265358979323846L));
131 sscanf(" 0X.0123456789abcdefffp-3g", "%Le%s", &ld, buf);
132 assert(ld == 0x0.0123456789abcdefffp-3L);
133 assert(strcmp(buf, "g") == 0);
136 sscanf("0xg", "%le%s", &d, buf);
138 assert(strcmp(buf, "xg") == 0);
140 assert(setlocale(LC_NUMERIC, "ru_RU.ISO8859-5")); /* decimalpoint==, */
142 sscanf("1.23", "%le%s", &d, buf);
144 assert(strcmp(buf, ".23") == 0);
146 sscanf("1,23", "%le", &d);
149 assert(setlocale(LC_NUMERIC, ""));
151 printf("ok 1 - scanfloat\n");
154 * Infinity and NaN tests
156 sscanf("-Inf", "%le", &d);
157 assert(d < 0.0 && isinf(d));
159 sscanf("iNfInItY and beyond", "%le%s", &d, buf);
160 assert(d > 0.0 && isinf(d));
161 assert(strcmp(buf, " and beyond"));
163 sscanf("NaN", "%le", &d);
166 sscanf("NAN(123Y", "%le%s", &d, buf);
168 assert(strcmp(buf, "(123Y") == 0);
170 sscanf("nan(f00f)plugh", "%le%s", &d, buf);
172 assert(strcmp(buf, "plugh") == 0);
174 sscanf("-nan", "%le", &d);
177 /* Only quiet NaNs should be returned. */
178 sscanf("NaN", "%e", &f);
179 sscanf("nan", "%le", &d);
180 sscanf("nan", "%Le", &ld);
181 feclearexcept(FE_ALL_EXCEPT);
185 assert(fetestexcept(FE_INVALID) == 0);
186 sscanf("nan(1234)", "%e", &f);
187 sscanf("nan(1234)", "%le", &d);
188 sscanf("nan(1234)", "%Le", &ld);
189 feclearexcept(FE_ALL_EXCEPT);
195 * POSIX says we should only generate quiet NaNs, but the gdtoa
196 * author convincingly argues that if you ask for a NaN format
197 * based on some implementation-defined string, you should get
198 * what you asked for, even if it's a signaling NaN.
200 assert(fetestexcept(FE_INVALID) == 0);
203 printf("ok 2 - scanfloat\n");
209 fesetround(FE_DOWNWARD);
211 sscanf("1.999999999999999999999999999999999", "%le", &d);
213 sscanf("0x1.ffffffffffffffp0", "%le", &d);
215 sscanf("1.999999999999999999999999999999999", "%Le", &ld);
218 sscanf("1.0571892669084007", "%le", &d);
219 assert(d == 0x1.0ea3f4af0dc59p0);
220 sscanf("-1.0571892669084007", "%le", &d);
221 assert(d == -0x1.0ea3f4af0dc5ap0);
222 sscanf("1.0571892669084010", "%le", &d);
223 assert(d == 0x1.0ea3f4af0dc5ap0);
225 sscanf("0x1.23p-5000", "%le", &d);
228 sscanf("0x1.2345678p-1050", "%le", &d);
229 assert(d == 0x1.234567p-1050);
231 fesetround(FE_UPWARD);
233 sscanf("1.0571892669084007", "%le", &d);
234 assert(d == 0x1.0ea3f4af0dc5ap0);
235 sscanf("-1.0571892669084007", "%le", &d);
236 assert(d == -0x1.0ea3f4af0dc59p0);
237 sscanf("1.0571892669084010", "%le", &d);
238 assert(d == 0x1.0ea3f4af0dc5bp0);
240 sscanf("0x1.23p-5000", "%le", &d);
241 assert(d == 0x1p-1074);
243 sscanf("0x1.2345678p-1050", "%le", &d);
244 assert(d == 0x1.234568p-1050);
246 fesetround(FE_TOWARDZERO);
248 sscanf("1.0571892669084007", "%le", &d);
249 assert(d == 0x1.0ea3f4af0dc59p0);
250 sscanf("-1.0571892669084007", "%le", &d);
251 assert(d == -0x1.0ea3f4af0dc59p0);
252 sscanf("1.0571892669084010", "%le", &d);
253 assert(d == 0x1.0ea3f4af0dc5ap0);
255 sscanf("0x1.23p-5000", "%le", &d);
258 sscanf("0x1.2345678p-1050", "%le", &d);
259 assert(d == 0x1.234567p-1050);
261 fesetround(FE_TONEAREST);
263 /* 1.0571892669084007 is slightly closer to 0x1.0ea3f4af0dc59p0 */
264 sscanf("1.0571892669084007", "%le", &d);
265 assert(d == 0x1.0ea3f4af0dc59p0);
266 sscanf("-1.0571892669084007", "%le", &d);
267 assert(d == -0x1.0ea3f4af0dc59p0);
268 sscanf("1.0571892669084010", "%le", &d);
269 assert(d == 0x1.0ea3f4af0dc5bp0);
271 /* strtod() should round small numbers to 0. */
272 sscanf("0x1.23p-5000", "%le", &d);
275 /* Extra digits in a denormal shouldn't break anything. */
276 sscanf("0x1.2345678p-1050", "%le", &d);
277 assert(d == 0x1.234568p-1050);
279 printf("ok 3 - scanfloat\n");
285 _eq(long double epsilon, long double a, long double b)
290 if (delta < 0) /* XXX no fabsl() */
292 return (delta <= epsilon);