1 /*
2 * Copyright (c) 2006-2024, RT-Thread Development Team
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Change Logs:
7 * Date Author Notes
8 * 2024-12-25 Meco Man first version
9 */
10
11 #include <rtthread.h>
12 #include <utest.h>
13
14 /* Basic move with no overlap */
TC_rt_memmove_basic(void)15 static void TC_rt_memmove_basic(void)
16 {
17 char src[] = "Hello";
18 char dest[10] = {0};
19 rt_memmove(dest, src, rt_strlen(src) + 1);
20 uassert_str_equal(dest, "Hello");
21 }
22
23 /* Move with overlap (src before dest) */
TC_rt_memmove_overlap_src_before(void)24 static void TC_rt_memmove_overlap_src_before(void)
25 {
26 char buffer[] = "1234567890";
27 rt_memmove(&buffer[3], buffer, 5);
28 uassert_str_equal(buffer, "1231234590");
29 }
30
31 /* Move with overlap (src after dest) */
TC_rt_memmove_overlap_src_after(void)32 static void TC_rt_memmove_overlap_src_after(void)
33 {
34 char buffer[] = "1234567890";
35 rt_memmove(&buffer[2], &buffer[5], 5);
36 uassert_str_equal(buffer, "1267890890");
37 }
38
39 /* Move with zero length */
TC_rt_memmove_zero_length(void)40 static void TC_rt_memmove_zero_length(void)
41 {
42 char src[] = "Hello";
43 char dest[10] = "World";
44 rt_memmove(dest, src, 0);
45 uassert_str_equal(dest, "World");
46 }
47
48 /* Move to the same location */
TC_rt_memmove_same_location(void)49 static void TC_rt_memmove_same_location(void)
50 {
51 char buffer[] = "Hello";
52 rt_memmove(buffer, buffer, rt_strlen(buffer) + 1);
53 uassert_str_equal(buffer, "Hello");
54 }
55
56 /* Move from NULL */
TC_rt_memmove_null_src(void)57 static void TC_rt_memmove_null_src(void)
58 {
59 char dest[10];
60 rt_memset(dest, 'A', sizeof(dest));
61 rt_memmove(dest, RT_NULL, 0); /* Should not crash and do nothing */
62 uassert_buf_equal(dest, "AAAAAAAAAA", 10);
63 }
64
65 /* Move to NULL */
TC_rt_memmove_null_dest(void)66 static void TC_rt_memmove_null_dest(void)
67 {
68 char src[] = "Hello";
69 rt_memmove(RT_NULL, src, 0); /* Should not crash and do nothing */
70 }
71
72 /* Move more than source size */
TC_rt_memmove_too_long(void)73 static void TC_rt_memmove_too_long(void)
74 {
75 char src[] = "Short";
76 char dest[10] = {0};
77 rt_memmove(dest, src, sizeof(src) + 5); /* Should only copy up to src length */
78 uassert_str_equal(dest, "Short");
79 uassert_int_equal(dest[5], 0); /* Ensure no buffer overflow */
80 }
81
82 /* Move empty string */
TC_rt_memmove_empty_string(void)83 static void TC_rt_memmove_empty_string(void)
84 {
85 char src[] = "";
86 char dest[10] = "Unchanged";
87 rt_memmove(dest, src, rt_strlen(src) + 1);
88
89 /* Expect dest to only contain '\0' at the start */
90 uassert_str_equal(dest, ""); /* Destination should now be an empty string */
91 uassert_int_equal(dest[0], '\0'); /* First character should be '\0' */
92 }
93
94 /* Utest function to run all test cases */
utest_do_tc(void)95 static void utest_do_tc(void)
96 {
97 UTEST_UNIT_RUN(TC_rt_memmove_basic);
98 UTEST_UNIT_RUN(TC_rt_memmove_overlap_src_before);
99 UTEST_UNIT_RUN(TC_rt_memmove_overlap_src_after);
100 UTEST_UNIT_RUN(TC_rt_memmove_zero_length);
101 UTEST_UNIT_RUN(TC_rt_memmove_same_location);
102 UTEST_UNIT_RUN(TC_rt_memmove_null_src);
103 UTEST_UNIT_RUN(TC_rt_memmove_null_dest);
104 UTEST_UNIT_RUN(TC_rt_memmove_too_long);
105 UTEST_UNIT_RUN(TC_rt_memmove_empty_string);
106 }
107
108 UTEST_TC_EXPORT(utest_do_tc, "klibc.rt_memmove", RT_NULL, RT_NULL, 1000);
109