There is no function that does this in the C standard. Unix systems that comply with POSIX are required to have strcasecmp
in the header strings.h
; Microsoft systems have stricmp
. To be on the portable side, write your own:
int strcicmp(char const *a, char const *b)
{
for (;; a++, b++) {
int d = tolower((unsigned char)*a) - tolower((unsigned char)*b);
if (d != 0 || !*a)
return d;
}
}
But note that none of these solutions will work with UTF-8 strings, only ASCII ones.