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memxxx function changes to be Misra compliant
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rbiasini committed Jul 3, 2019
1 parent 3a6cd29 commit cf6985a
Showing 1 changed file with 16 additions and 12 deletions.
28 changes: 16 additions & 12 deletions board/libc.h
Original file line number Diff line number Diff line change
Expand Up @@ -6,32 +6,36 @@ void delay(int a) {
}

void *memset(void *str, int c, unsigned int n) {
unsigned int i;
for (i = 0; i < n; i++) {
*((uint8_t*)str) = c;
++str;
uint8_t *s = str;
for (unsigned int i = 0; i < n; i++) {
*s = c;
s++;
}
return str;
}

void *memcpy(void *dest, const void *src, unsigned int n) {
unsigned int i;
// TODO: make not slow
for (i = 0; i < n; i++) {
((uint8_t*)dest)[i] = *(uint8_t*)src;
++src;
uint8_t *d = dest;
const uint8_t *s = src;
for (unsigned int i = 0; i < n; i++) {
*d = *s;
d++;
s++;
}
return dest;
}

int memcmp(const void * ptr1, const void * ptr2, unsigned int num) {
unsigned int i;
int ret = 0;
for (i = 0; i < num; i++) {
if ( ((uint8_t*)ptr1)[i] != ((uint8_t*)ptr2)[i] ) {
const uint8_t *p1 = ptr1;
const uint8_t *p2 = ptr2;
for (unsigned int i = 0; i < num; i++) {
if (*p1 != *p2) {
ret = -1;
break;
}
p1++;
p2++;
}
return ret;
}
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