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/*
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-05-06 Phillip Johnston the first version
* 2024-12-24 Meco Man port to utest
*/
#include <rtthread.h>
#include <utest.h>
#define N 80 /**< Define the constant N for buffer size as 80 */
#define TEST_BUF_SIZE 512 /**< Define the constant TEST_BUF_SIZE as 512 */
static char *buf; /**< Define a static buffer of 512 bytes, initialized to 0 */
static rt_err_t utest_tc_init(void)
{
buf = rt_malloc(TEST_BUF_SIZE * sizeof(char)); /**< Allocate memory for the buffer */
uassert_not_null(buf);
return RT_EOK;
}
static rt_err_t utest_tc_cleanup(void)
{
rt_free(buf);
return RT_EOK;
}
/**
* Test memory copy with alignment.
* @param dalign The alignment offset for the destination buffer.
* @param salign The alignment offset for the source buffer.
* @param len The length of data to copy.
*/
static void test_align(unsigned dalign, unsigned salign, size_t len)
{
char *src = (char *)RT_ALIGN((rt_ubase_t)buf, 64); /**< Source buffer starting address, 64-byte aligned */
char *dst = (char *)RT_ALIGN(((rt_ubase_t)buf + 128), 64); /**< Destination buffer starting address, 64-byte aligned from buf+128 */
char *want = (char *)RT_ALIGN(((rt_ubase_t)buf + 256), 64); /**< Expected result buffer starting address, 64-byte aligned from buf+256 */
char *p; /**< Pointer to receive the return value of rt_memcpy */
unsigned i;
/** Assert that the source alignment offset plus length does not exceed N */
uassert_false(salign + len > N);
/** Assert that the destination alignment offset plus length does not exceed N */
uassert_false(dalign + len > N);
/** Initialize all buffers with '#' or ' ' */
for(i = 0; i < N; i++)
{
src[i] = '#';
dst[i] = want[i] = ' ';
}
/** Set data in the specified alignment offsets of the source and expected result buffers */
for(i = 0; i < len; i++)
{
src[salign + i] = want[dalign + i] = (char)('0' + i);
}
/** Call rt_memcpy to copy data */
p = rt_memcpy(dst + dalign, src + salign, len);
/** Assert that the return value of rt_memcpy is the pointer to the start of the copied data in the destination buffer */
uassert_ptr_equal(p, dst + dalign);
/** Assert that the content of the destination buffer matches the expected result buffer */
for(i = 0; i < N; i++)
{
uassert_int_equal(dst[i], want[i]);
}
}
/**
* Test case to iterate over all possible alignment offsets and length combinations.
*/
static void TC_rt_memcpy_align(void)
{
for(unsigned i = 0; i < 16; i++) /**< Iterate over source alignment offsets from 0 to 15 */
{
for(unsigned j = 0; j < 16; j++) /**< Iterate over destination alignment offsets from 0 to 15 */
{
for(size_t k = 0; k < 64; k++) /**< Iterate over data lengths from 0 to 63 */
{
test_align(i, j, k); /**< Call the test_align function */
}
}
}
}
static void TC_rt_memcpy_str(void)
{
const char src[] = "Hello, memcpy!";
char dest[20] = {0};
rt_memcpy(dest, src, sizeof(src));
uassert_true(rt_strcmp(src, dest) == 0);
}
static void utest_do_tc(void)
{
UTEST_UNIT_RUN(TC_rt_memcpy_str);
UTEST_UNIT_RUN(TC_rt_memcpy_align);
}
UTEST_TC_EXPORT(utest_do_tc, "core.klibc.rt_memcpy", utest_tc_init, utest_tc_cleanup, 1000);
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