1 /*
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright © 2022 Keith Packard
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials provided
16 * with the distribution.
17 *
18 * 3. Neither the name of the copyright holder nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
31 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
33 * OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36 #include <stdlib.h>
37 #include <stdio.h>
38 #include <math.h>
39
40 #if defined (TINY_STDIO) || !defined(__PICOLIBC__)
41 #define FULL_TESTS
42 #endif
43
44 struct {
45 char *string;
46 double dvalue;
47 float fvalue;
48 long double ldvalue;
49 } tests[] = {
50 { "1e2@", 100.0, 100.0f, 100.0l },
51 #ifdef FULL_TESTS
52 { "0x1p-1@", 0.5, 0.5f, 0.5l },
53 { "0x1p-10000000000000000000000000@", 0.0, 0.0f, 0.0l },
54 { "0x1p0@", 1.0, 1.0f, 1.0l },
55 { "0x10p0@", 16.0, 16.0f, 16.0l },
56 { "0x1p-1023@", 0x1p-1023, 0.0f, 0x1p-1023l },
57 /* Check round-to-even for floats */
58 { "0x1.000002p0@", 0x1.000002p0, 0x1.000002p0f, 0x1.000002p0l },
59 { "0x1.000003p0@", 0x1.000003p0, 0x1.000004p0f, 0x1.000003p0l },
60 { "0x1.000001p0@", 0x1.000001p0, 0x1.000000p0f, 0x1.000001p0l },
61 { "0x1.000001000000001p0@", 0x1.000001p0, 0x1.000002p0f, 0x1.000001000000001p0l },
62 /* Check round-to-even for doubles */
63 { "0x100000000000008p0@", 0x1p56, 0x1p56f, 0x1.00000000000008p56l },
64 { "0x100000000000008.p0@", 0x1p56, 0x1p56f, 0x1.00000000000008p56l },
65 { "0x100000000000008.00p0@", 0x1p56,0x1p56f, 0x1.00000000000008p56l },
66 { "0x10000000000000800p0@", 0x1p64, 0x1p64f, 0x1.00000000000008p64l },
67 { "0x10000000000000801p0@", 0x1.0000000000001p64, 0x1p64f, 0x1.0000000000000801p64l },
68 { "0x10000000000000800.0000000000001p0@", 0x1.0000000000001p64, 0x1p64f, 0x1.00000000000008p64l },
69 { "0x10000000000001800p0@", 0x1.0000000000002p64, 0x1p64f, 0x1.00000000000018p64l },
70 /* Check max values for floats */
71 { "0x1.fffffep126@", 0x1.fffffep126, 0x1.fffffep126f, 0x1.fffffep126l },
72 { "0x1.ffffffp126@", 0x1.ffffffp126, 0x1.000000p127f, 0x1.ffffffp126l },
73 { "0x1.fffffep127@", 0x1.fffffep127, 0x1.fffffep127f, 0x1.fffffep127l },
74 { "0x1.ffffffp127@", 0x1.ffffffp127, (float) INFINITY, 0x1.ffffffp127l }, /* rounds up to INFINITY for float */
75 /* Check max values for doubles */
76 { "0x1.fffffffffffffp1022@", 0x1.fffffffffffffp1022, (float) INFINITY, 0x1.fffffffffffffp1022l },
77 { "0x1.fffffffffffff8p1022@", 0x1.0000000000000p1023, (float) INFINITY, 0x1.fffffffffffff8p1022l }, /* rounds up for double */
78 { "0x1.fffffffffffffp1023@", 0x1.fffffffffffffp1023, (float) INFINITY, 0x1.fffffffffffffp1023l },
79 #if __LDBL_MANT_DIG__ > __DBL_MANT_DIG__
80 { "0x1.fffffffffffff8p1023@", (double) INFINITY, (float) INFINITY, 0x1.fffffffffffff8p1023l }, /* rounds up to INFINITY for double */
81 #else
82 { "0x1.fffffffffffff8p1023@", (double) INFINITY, (float) INFINITY, (long double) INFINITY }, /* rounds up to INFINITY for double */
83 #endif
84 /* Check max values for long doubles */
85 #if __LDBL_MANT_DIG__ == 113
86 { "0x1.ffffffffffffffffffffffffffffp16382@", (double) INFINITY, (float) INFINITY, 0x1.ffffffffffffffffffffffffffffp16382l },
87 { "0x1.ffffffffffffffffffffffffffff8p16382@", (double) INFINITY, (float) INFINITY, 0x1.0000000000000000000000000000p16383l }, /* rounds up for long double */
88 { "0x1.ffffffffffffffffffffffffffffp16383@", (double) INFINITY, (float) INFINITY, 0x1.ffffffffffffffffffffffffffffp16383l },
89 { "0x1.ffffffffffffffffffffffffffff8p16383@", (double) INFINITY, (float) INFINITY, (long double) INFINITY }, /* rounds up to INFINITY for long oduble */
90 #elif __LDBL_MANT_DIG__ == 64
91 { "0x1.fffffffffffffffep16382@", (double) INFINITY, (float) INFINITY, 0x1.fffffffffffffffep16382l },
92 { "0x1.ffffffffffffffffp16382@", (double) INFINITY, (float) INFINITY, 0x1.0000000000000000p16383l }, /* rounds up for long double */
93 { "0x1.fffffffffffffffep16383@", (double) INFINITY, (float) INFINITY, 0x1.fffffffffffffffep16383l },
94 { "0x1.ffffffffffffffffp16383@", (double) INFINITY, (float) INFINITY, (long double) INFINITY }, /* rounds up to INFINITY for long double */
95 #endif
96 #endif
97 };
98
99 #define NTESTS (sizeof(tests)/sizeof(tests[0]))
100
main(void)101 int main(void)
102 {
103 int i;
104 double d;
105 float f;
106 #ifdef FULL_TESTS
107 long double ld;
108 #endif
109 char *end;
110 int ret = 0;
111
112 for (i = 0; i < (int) NTESTS; i++) {
113 d = strtod(tests[i].string, &end);
114 if (d != tests[i].dvalue) {
115 printf("strtod(\"%s\"): got %.17e %a want %.17e %a\n", tests[i].string,
116 d, d, tests[i].dvalue, tests[i].dvalue);
117 ret = 1;
118 }
119 if (*end != '@') {
120 printf("strtod(\"%s\") end is \"%s\"\n",
121 tests[i].string, end);
122 ret = 1;
123 }
124 f = strtof(tests[i].string, &end);
125 if (f != tests[i].fvalue) {
126 printf("strtof(\"%s\"): got %.17e %a want %.17e %a\n", tests[i].string,
127 (double) f, (double) f, (double) tests[i].fvalue, (double) tests[i].fvalue);
128 ret = 1;
129 }
130 if (*end != '@') {
131 printf("strtof(\"%s\") end is \"%s\"\n", tests[i].string, end);
132 ret = 1;
133 }
134 #ifdef FULL_TESTS
135 if (sizeof(long double) > sizeof(double)) {
136 ld = strtold(tests[i].string, &end);
137 if (ld != tests[i].ldvalue) {
138 printf("strtold(\"%s\"): got %.17Le %La want %.17Le %La\n", tests[i].string,
139 ld, ld, tests[i].ldvalue, tests[i].ldvalue);
140 ret = 1;
141 }
142 if (*end != '@') {
143 printf("strtold(\"%s\") end is \"%s\"\n", tests[i].string, end);
144 ret = 1;
145 }
146 }
147 #endif
148 }
149 return ret;
150 }
151
