#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/locale/gbk.c,v 1.14 2007/10/13 16:28:21 ache Exp $");
#include "xlocale_private.h"
#include <sys/types.h>
#include <errno.h>
#include <runetype.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include "mblocal.h"
static size_t _GBK_mbrtowc(wchar_t * __restrict, const char * __restrict,
size_t, mbstate_t * __restrict, locale_t);
static int _GBK_mbsinit(const mbstate_t *, locale_t);
static size_t _GBK_wcrtomb(char * __restrict, wchar_t,
mbstate_t * __restrict, locale_t);
typedef struct {
wchar_t ch;
} _GBKState;
int
_GBK_init(struct __xlocale_st_runelocale *xrl)
{
xrl->__mbrtowc = _GBK_mbrtowc;
xrl->__wcrtomb = _GBK_wcrtomb;
xrl->__mbsinit = _GBK_mbsinit;
xrl->__mb_cur_max = 2;
xrl->__mb_sb_limit = 128;
return (0);
}
static int
_GBK_mbsinit(const mbstate_t *ps, locale_t loc __unused)
{
return (ps == NULL || ((const _GBKState *)ps)->ch == 0);
}
static __inline int
_gbk_check(u_int c)
{
c &= 0xff;
return ((c >= 0x81 && c <= 0xfe) ? 2 : 1);
}
static size_t
_GBK_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
mbstate_t * __restrict ps, locale_t loc __unused)
{
_GBKState *gs;
wchar_t wc;
size_t len;
gs = (_GBKState *)ps;
if ((gs->ch & ~0xFF) != 0) {
errno = EINVAL;
return ((size_t)-1);
}
if (s == NULL) {
s = "";
n = 1;
pwc = NULL;
}
if (n == 0)
return ((size_t)-2);
if (gs->ch != 0) {
if (*s == '\0') {
errno = EILSEQ;
return ((size_t)-1);
}
wc = (gs->ch << 8) | (*s & 0xFF);
if (pwc != NULL)
*pwc = wc;
gs->ch = 0;
return (1);
}
len = (size_t)_gbk_check(*s);
wc = *s++ & 0xff;
if (len == 2) {
if (n < 2) {
gs->ch = wc;
return ((size_t)-2);
}
if (*s == '\0') {
errno = EILSEQ;
return ((size_t)-1);
}
wc = (wc << 8) | (*s++ & 0xff);
if (pwc != NULL)
*pwc = wc;
return (2);
} else {
if (pwc != NULL)
*pwc = wc;
return (wc == L'\0' ? 0 : 1);
}
}
static size_t
_GBK_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps, locale_t loc __unused)
{
_GBKState *gs;
gs = (_GBKState *)ps;
if (gs->ch != 0) {
errno = EINVAL;
return ((size_t)-1);
}
if (s == NULL)
return (1);
if (wc & 0x8000) {
*s++ = (wc >> 8) & 0xff;
*s = wc & 0xff;
return (2);
}
*s = wc & 0xff;
return (1);
}