Embed Notice

/* SPDX-License-Identifier: MIT */

int
scmp(const char *a,
const char *b,
size_t maxlen,
int *rval)
{
size_t ch;
unsigned char ac;
unsigned char bc;

if (a == NULL ||
b == NULL ||
rval == NULL) {

errno = EFAULT;
return -1;
}

for (ch = 0; ch < maxlen; ch++) {

ac = (unsigned char)a[ch];
bc = (unsigned char)b[ch];

if (ac != bc) {
*rval = ac - bc;
return 0;
}

if (ac == '\0') {
*rval = 0;
return 0;
}
}

errno = EFAULT;
return -1;
}