scanfloat_test.c revision 116969 
1/*-
2 * Copyright (C) 2003 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: head/tools/regression/lib/libc/stdio/test-scanfloat.c 116969 2003-06-28 09:03:44Z das $");
33
34#include <assert.h>
35#include <float.h>
36#include <locale.h>
37#include <math.h>
38#include <stdio.h>
39#include <string.h>
40
41#define	eq(type, a, b)	_eq(type##_EPSILON, (a), (b))
42static int _eq(long double epsilon, long double a, long double b);
43
44extern int __scanfdebug;
45
46int
47main(int argc, char *argv[])
48{
49	char buf[128];
50	long double ld = 0.0;
51	double d = 0.0;
52	float f = 0.0;
53
54	buf[0] = '\0';
55	assert(setlocale(LC_NUMERIC, ""));
56
57	__scanfdebug = 1;
58
59	sscanf("3.141592", "%e", &f);
60	assert(eq(FLT, f, 3.141592));
61
62	sscanf("3.141592653589793", "%lf", &d);
63	assert(eq(DBL, d, 3.141592653589793));
64
65	sscanf("3.14159265358979323846", "%Lg", &ld);
66	assert(eq(LDBL, ld, 3.14159265358979323846L));
67
68	sscanf("1.234568e+06", "%E", &f);
69	assert(eq(FLT, f, 1.234568e+06));
70
71	sscanf("-1.234568e6", "%lF", &d);
72	assert(eq(DBL, d, -1.234568e6));
73
74	sscanf("+1.234568e-52", "%LG", &ld);
75	assert(eq(LDBL, ld, 1.234568e-52L));
76
77	sscanf("0.1", "%la", &d);
78	assert(eq(DBL, d, 0.1));
79
80	sscanf("00.2", "%lA", &d);
81	assert(eq(DBL, d, 0.2));
82
83	sscanf("123456", "%5le%s", &d, buf);
84	assert(eq(DBL, d, 12345.));
85	assert(strcmp(buf, "6") == 0);
86
87	sscanf("1.0Q", "%*5le%s", buf);
88	assert(strcmp(buf, "Q") == 0);
89
90	sscanf("-1.23e", "%e%s", &f, buf);
91	assert(eq(FLT, f, -1.23));
92	assert(strcmp(buf, "e") == 0);
93
94	sscanf("1.25e+", "%le%s", &d, buf);
95	assert(eq(DBL, d, 1.25));
96	assert(strcmp(buf, "e+") == 0);
97
98	sscanf("1.23E4E5", "%le%s", &d, buf);
99	assert(eq(DBL, d, 1.23e4));
100	assert(strcmp(buf, "E5") == 0);
101
102	sscanf("12e6", "%le", &d);
103	assert(eq(DBL, d, 12e6));
104
105	sscanf("1.a", "%le%s", &d, buf);
106	assert(eq(DBL, d, 1.0));
107	assert(strcmp(buf, "a") == 0);
108
109	sscanf(".0p4", "%le%s", &d, buf);
110	assert(eq(DBL, d, 0.0));
111	assert(strcmp(buf, "p4") == 0);
112
113	d = 0.25;
114	assert(sscanf(".", "%le", &d) == 0);
115	assert(d == 0.25);
116
117	sscanf("0x08", "%le", &d);
118	assert(d == 0x8p0);
119
120	sscanf("0x90a.bcdefP+09a", "%le%s", &d, buf);
121	assert(d == 0x90a.bcdefp+09);
122	assert(strcmp(buf, "a") == 0);
123
124#if LDBL_MANT_DIG > DBL_MANT_DIG
125	sscanf("  0X.0123456789abcdefffp-3g", "%Le%s", &ld, buf);
126	assert(ld == 0x.0123456789abcdefffp-3L);
127	assert(strcmp(buf, "g") == 0);
128#endif
129
130	sscanf("0xg", "%le%s", &d, buf);
131	assert(d == 0.0);
132	assert(strcmp(buf, "xg") == 0);
133
134	assert(setlocale(LC_NUMERIC, "ru_RU.ISO8859-5")); /* decimalpoint==, */
135
136	sscanf("1.23", "%le%s", &d, buf);
137	assert(d == 1.0);
138	assert(strcmp(buf, ".23") == 0);
139
140	sscanf("1,23", "%le", &d);
141	assert(d == 1.23);
142
143	assert(setlocale(LC_NUMERIC, ""));
144
145	sscanf("-Inf", "%le", &d);
146	assert(d < 0.0 && isinf(d));
147
148	sscanf("iNfInItY and beyond", "%le%s", &d, buf);
149	assert(d > 0.0 && isinf(d));
150	assert(strcmp(buf, " and beyond"));
151
152	sscanf("NaN", "%le", &d);
153	assert(isnan(d));
154
155	sscanf("NAN(123Y", "%le%s", &d, buf);
156	assert(isnan(d));
157	assert(strcmp(buf, "(123Y") == 0);
158
159	sscanf("nan(f00f)plugh", "%le%s", &d, buf);
160	assert(isnan(d));
161	assert(strcmp(buf, "plugh") == 0);
162
163	sscanf("-nan", "%le", &d);
164	assert(isnan(d));
165
166	printf("PASS scanfloat\n");
167
168	return (0);
169}
170
171static int
172_eq(long double epsilon, long double a, long double b)
173{
174	long double delta;
175
176	delta = a - b;
177	if (delta < 0)		/* XXX no fabsl() */
178		delta = -delta;
179	return (delta <= epsilon);
180}
181