1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 2002, Uwe Bonnes
4 * Copyright (c) 2001-2004, Roger Dingledine.
5 * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
6 * Copyright (c) 2007-2016, The Tor Project, Inc.
7 * Copyright (c) 2020, EPAM Systems Inc.
8 *
9 * Unit tests for sscanf() function
10 */
11
12 #include <command.h>
13 #include <log.h>
14 #include <test/lib.h>
15 #include <test/test.h>
16 #include <test/ut.h>
17
18 #define EOF -1
19
20 /**
21 * lib_sscanf() - unit test for sscanf()
22 * @uts: unit test state
23 *
24 * Test sscanf() with varied parameters in different combinations passed
25 * as arguments.
26 *
27 * Return: 0 - success
28 * 1 - failure
29 */
lib_sscanf(struct unit_test_state * uts)30 static int lib_sscanf(struct unit_test_state *uts)
31 {
32 char buffer[100], buffer1[100];
33 int result, ret;
34 static const char pname[] = " Hello World!\n";
35 int hour = 21, min = 59, sec = 20;
36 int number, number_so_far;
37 unsigned int u1, u2, u3;
38 char s1[20], s2[10], s3[10], ch;
39 int r, int1, int2;
40 long lng1;
41
42 /* check EOF */
43 strcpy(buffer, "");
44 ret = sscanf(buffer, "%d", &result);
45 ut_asserteq(ret, EOF);
46
47 /* check %x */
48 strcpy(buffer, "0x519");
49 ut_asserteq(sscanf(buffer, "%x", &result), 1);
50 ut_asserteq(result, 0x519);
51
52 strcpy(buffer, "0x51a");
53 ut_asserteq(sscanf(buffer, "%x", &result), 1);
54 ut_asserteq(result, 0x51a);
55
56 strcpy(buffer, "0x51g");
57 ut_asserteq(sscanf(buffer, "%x", &result), 1);
58 ut_asserteq(result, 0x51);
59
60 /* check strings */
61 ret = sprintf(buffer, " %s", pname);
62 ret = sscanf(buffer, "%*c%[^\n]", buffer1);
63 ut_asserteq(ret, 1);
64 ut_asserteq(strncmp(pname, buffer1, strlen(buffer1)), 0);
65
66 /* check digits */
67 ret = sprintf(buffer, "%d:%d:%d", hour, min, sec);
68 ret = sscanf(buffer, "%d%n", &number, &number_so_far);
69 ut_asserteq(ret, 1);
70 ut_asserteq(number, hour);
71 ut_asserteq(number_so_far, 2);
72
73 ret = sscanf(buffer + 2, "%*c%n", &number_so_far);
74 ut_asserteq(ret, 0);
75 ut_asserteq(number_so_far, 1);
76
77 /* Check %i */
78 strcpy(buffer, "123");
79 ret = sscanf(buffer, "%i", &result);
80 ut_asserteq(ret, 1);
81 ut_asserteq(result, 123);
82 ret = sscanf(buffer, "%d", &result);
83 ut_asserteq(ret, 1);
84 ut_asserteq(result, 123);
85
86 ut_asserteq(0, sscanf("hello world", "hello world"));
87 ut_asserteq(0, sscanf("hello world", "good bye"));
88 /* Excess data */
89 ut_asserteq(0, sscanf("hello 3", "%u", &u1)); /* have to match the start */
90 ut_asserteq(1, sscanf("3 hello", "%u", &u1)); /* but trailing is alright */
91
92 /* Numbers (ie. %u) */
93 ut_asserteq(0, sscanf("hello world 3", "hello worlb %u", &u1)); /* d vs b */
94 ut_asserteq(1, sscanf("12345", "%u", &u1));
95 ut_asserteq(12345u, u1);
96 ut_asserteq(1, sscanf("0", "%u", &u1));
97 ut_asserteq(0u, u1);
98 ut_asserteq(1, sscanf("0000", "%u", &u2));
99 ut_asserteq(0u, u2);
100 ut_asserteq(0, sscanf("A", "%u", &u1)); /* bogus number */
101
102 /* Numbers with size (eg. %2u) */
103 ut_asserteq(2, sscanf("123456", "%2u%u", &u1, &u2));
104 ut_asserteq(12u, u1);
105 ut_asserteq(3456u, u2);
106 ut_asserteq(1, sscanf("123456", "%8u", &u1));
107 ut_asserteq(123456u, u1);
108 ut_asserteq(1, sscanf("123457 ", "%8u", &u1));
109 ut_asserteq(123457u, u1);
110 ut_asserteq(3, sscanf("!12:3:456", "!%2u:%2u:%3u", &u1, &u2, &u3));
111 ut_asserteq(12u, u1);
112 ut_asserteq(3u, u2);
113 ut_asserteq(456u, u3);
114 ut_asserteq(3, sscanf("67:8:099", "%2u:%2u:%3u", &u1, &u2, &u3)); /* 0s */
115 ut_asserteq(67u, u1);
116 ut_asserteq(8u, u2);
117 ut_asserteq(99u, u3);
118 /* Arbitrary amounts of 0-padding are okay */
119 ut_asserteq(3, sscanf("12:03:000000000000000099", "%2u:%2u:%u", &u1, &u2, &u3));
120 ut_asserteq(12u, u1);
121 ut_asserteq(3u, u2);
122 ut_asserteq(99u, u3);
123
124 /* Hex (ie. %x) */
125 ut_asserteq(3, sscanf("1234 02aBcdEf ff", "%x %x %x", &u1, &u2, &u3));
126 ut_asserteq(0x1234, u1);
127 ut_asserteq(0x2ABCDEF, u2);
128 ut_asserteq(0xFF, u3);
129 /* Width works on %x */
130 ut_asserteq(3, sscanf("f00dcafe444", "%4x%4x%u", &u1, &u2, &u3));
131 ut_asserteq(0xf00d, u1);
132 ut_asserteq(0xcafe, u2);
133 ut_asserteq(444, u3);
134
135 /* Literal '%' (ie. '%%') */
136 ut_asserteq(1, sscanf("99% fresh", "%3u%% fresh", &u1));
137 ut_asserteq(99, u1);
138 ut_asserteq(0, sscanf("99 fresh", "%% %3u %s", &u1, s1));
139 ut_asserteq(1, sscanf("99 fresh", "%3u%% %s", &u1, s1));
140 ut_asserteq(2, sscanf("99 fresh", "%3u %5s %%", &u1, s1));
141 ut_asserteq(99, u1);
142 ut_asserteq_str(s1, "fresh");
143 ut_asserteq(1, sscanf("% boo", "%% %3s", s1));
144 ut_asserteq_str("boo", s1);
145
146 /* Strings (ie. %s) */
147 ut_asserteq(2, sscanf("hello", "%3s%7s", s1, s2));
148 ut_asserteq_str(s1, "hel");
149 ut_asserteq_str(s2, "lo");
150 ut_asserteq(2, sscanf("WD40", "%2s%u", s3, &u1)); /* %s%u */
151 ut_asserteq_str(s3, "WD");
152 ut_asserteq(40, u1);
153 ut_asserteq(2, sscanf("WD40", "%3s%u", s3, &u1)); /* %s%u */
154 ut_asserteq_str(s3, "WD4");
155 ut_asserteq(0, u1);
156 ut_asserteq(2, sscanf("76trombones", "%6u%9s", &u1, s1)); /* %u%s */
157 ut_asserteq(76, u1);
158 ut_asserteq_str(s1, "trombones");
159
160 ut_asserteq(3, sscanf("1.2.3", "%u.%u.%u%c", &u1, &u2, &u3, &ch));
161 ut_asserteq(4, sscanf("1.2.3 foobar", "%u.%u.%u%c", &u1, &u2, &u3, &ch));
162 ut_asserteq(' ', ch);
163
164 r = sscanf("12345 -67890 -1", "%d %ld %d", &int1, &lng1, &int2);
165 ut_asserteq(r, 3);
166 ut_asserteq(int1, 12345);
167 ut_asserteq(lng1, -67890);
168 ut_asserteq(int2, -1);
169
170 return 0;
171 }
172 LIB_TEST(lib_sscanf, 0);
173