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#include <assert.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
/*
* Returns the factorial for the given unsigned 64-bit integer.
*
* Implemented in factorial.S
*/
int factorial(uint64_t n);
void test_factorial(void)
{
assert(factorial(0) == 0);
assert(factorial(1) == 1);
assert(factorial(2) == 2);
assert(factorial(3) == 6);
assert(factorial(4) == 24);
printf("factorial:\t\tOK\n");
}
/*
* Returns a pointer with the same given string but reversed. Note that the
* string cannot be in read-only space since the reversal is done in-place.
*
* Implemented in string.S
*/
char * reverse_string(char *str);
void test_reverse_string(void)
{
assert(reverse_string(NULL) == NULL);
assert(reverse_string("") == "");
char s1[] = "This is a string.";
assert(strcmp(reverse_string(s1), ".gnirts a si sihT") == 0);
char s2[] = ".";
assert(strcmp(reverse_string(s2), ".") == 0);
printf("reverse_string:\t\tOK\n");
}
/*
* Returns true if the given string is a palindrome, false otherwise.
*
* Implemented in string.S
*/
bool is_palindrome(char *str);
void test_is_palindrome(void)
{
assert(is_palindrome(NULL) == 0);
assert(is_palindrome("") == 0);
assert(is_palindrome("aba") == 1);
assert(is_palindrome("aaa") == 1);
assert(is_palindrome("This is a a si sihT") == 1);
printf("is_palindrome:\t\tOK\n");
}
/*
* This function computes the following: ((a + b) * b) + b. Don't try to make
* sense of it, that's the computation I ended up while messing with RISC-V
* floating point instructions. Anyways, with this in mind, it will return if
* the computed value is greater than 10.
*
* Implemented in float.S
*/
bool greater_than_ten(double a, uint64_t b);
void test_greater_than_ten(void)
{
assert(!greater_than_ten(2.3, 1)); // 4.3
assert(greater_than_ten(2.3, 2)); // 10.6
printf("greater_than_ten:\tOK\n");
}
int main()
{
test_factorial();
test_reverse_string();
test_is_palindrome();
test_greater_than_ten();
}
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