#ifndef _LIBC_STUB_
#define _LIBC_STUB_

#define NULL (void*)0

static int errno = 0;

#define	EINVAL 1    /* Invalid argument */
#define EILSEQ 2    /* Illegal byte sequence */
#define	E2BIG  3    /* Arg list too long */

typedef unsigned long size_t;

static inline int isupper(int c)
{
	return (unsigned)c-'A' < 26;
}

static inline int tolower(int c)
{
	if (isupper(c)) return c | 32;
	return c;
}

static inline int strcasecmp(const char *_l, const char *_r)
{
	const unsigned char *l=(unsigned char*)_l, *r=(unsigned char*)_r;
	for (; *l && *r && (*l == *r || tolower(*l) == tolower(*r)); l++, r++);
	return tolower(*l) - tolower(*r);
}

#endif // _LIBC_STUB_