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#ifndef MLIB_MBSTRING_H
#define MLIB_MBSTRING_H
#include <stddef.h>
#include "__charN_t.h"
#include "__qmacros.h"
#include "__rune.h"
#include "__u8view.h"
#define U8V(s) ((struct u8view){.p = (s), .len = sizeof(s) - 1})
/* clang-format off */
#define U8_BYTE_1(x) (((x) & 0x80) == 0x00)
#define U8_BYTE_2(x) (((x) & 0xE0) == 0xC0)
#define U8_BYTE_3(x) (((x) & 0xF0) == 0xE0)
#define U8_BYTE_4(x) (((x) & 0xF8) == 0xF0)
#define U8_BYTE_C(x) (((x) & 0xC0) == 0x80)
/* clang-format on */
#define U8_1B_MAX RUNE_C(0x00007FL)
#define U8_2B_MAX RUNE_C(0x0007FFL)
#define U8_3B_MAX RUNE_C(0x00FFFFL)
#define U8_4B_MAX RUNE_C(0x10FFFFL)
#define U8_LEN_MAX 4
#define PRIsU8 ".*s"
#define U8_PRI_ARGS(sv) ((int)(sv).len), ((sv).p)
bool u8haspfx(const char8_t *, size_t, const char8_t *, size_t);
bool u8hassfx(const char8_t *, size_t, const char8_t *, size_t);
char8_t *u8chk(const char8_t *, size_t);
char8_t *u8chr(const char8_t *, rune, size_t);
char8_t *u8rchr(const char8_t *, rune, size_t);
int rtou8(char8_t *, rune, size_t);
int u8cmp(struct u8view, struct u8view);
int u8next(rune *, const char8_t **, size_t *);
int u8prev(rune *, const char8_t **, const char8_t *);
int u8tor(rune *, const char8_t *);
size_t u8cspn(const char8_t *, size_t, const rune *, size_t);
size_t u8len(const char8_t *, size_t);
size_t u8spn(const char8_t *, size_t, const rune *, size_t);
#if !__MLIB_NO_MACRO_WRAPPER
# define u8chk(s, n) __MLIB_Q_PTR(char8_t, u8chk, (s), (s), (n))
# define u8chr(s, ch, n) __MLIB_Q_PTR(char8_t, u8chr, (s), (s), (ch), (n))
# define u8rchr(s, ch, n) __MLIB_Q_PTR(char8_t, u8rchr, (s), (s), (ch), (n))
#endif
#endif /* !MLIB_MBSTRING_H */
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