size_t
mbrtoc16 (char16_t *pc16, const char *s, size_t n, mbstate_t *ps)
{
if (ps == NULL)
ps = &state;
/* The standard text does not say that S being NULL means the state
is reset even if the second half of a surrogate still have to be
returned. In fact, the error code description indicates
otherwise. Therefore always first try to return a second
half. */
if (ps->__count & 0x80000000)
{
/* We have to return the second word for a surrogate. */
ps->__count &= 0x7fffffff;
*pc16 = ps->__value.__wch;
ps->__value.__wch = L'\0';
return (size_t) -3;
}
wchar_t wc;
struct __gconv_step_data data;
int status;
size_t result;
size_t dummy;
const unsigned char *inbuf, *endbuf;
unsigned char *outbuf = (unsigned char *) &wc;
const struct gconv_fcts *fcts;
/* Set information for this step. */
data.__invocation_counter = 0;
data.__internal_use = 1;
data.__flags = __GCONV_IS_LAST;
data.__statep = ps;
data.__trans = NULL;
/* A first special case is if S is NULL. This means put PS in the
initial state. */
if (s == NULL)
{
pc16 = NULL;
s = "";
n = 1;
}
/* Tell where we want the result. */
data.__outbuf = outbuf;
data.__outbufend = outbuf + sizeof (wchar_t);
/* Get the conversion functions. */
fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE));
/* Do a normal conversion. */
inbuf = (const unsigned char *) s;
endbuf = inbuf + n;
if (__glibc_unlikely (endbuf < inbuf))
{
endbuf = (const unsigned char *) ~(uintptr_t) 0;
if (endbuf == inbuf)
goto ilseq;
}
__gconv_fct fct = fcts->towc->__fct;
#ifdef PTR_DEMANGLE
if (fcts->towc->__shlib_handle != NULL)
PTR_DEMANGLE (fct);
#endif
status = DL_CALL_FCT (fct, (fcts->towc, &data, &inbuf, endbuf,
NULL, &dummy, 0, 1));
/* There must not be any problems with the conversion but illegal input
characters. The output buffer must be large enough, otherwise the
definition of MB_CUR_MAX is not correct. All the other possible
errors also must not happen. */
assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT
|| status == __GCONV_ILLEGAL_INPUT
|| status == __GCONV_INCOMPLETE_INPUT
|| status == __GCONV_FULL_OUTPUT);
if (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT
|| status == __GCONV_FULL_OUTPUT)
{
result = inbuf - (const unsigned char *) s;
if (wc < 0x10000)
{
if (pc16 != NULL)
*pc16 = wc;
if (data.__outbuf != outbuf && wc == L'\0')
{
/* The converted character is the NUL character. */
assert (__mbsinit (data.__statep));
result = 0;
}
}
else
{
/* This is a surrogate. */
if (pc16 != NULL)
*pc16 = 0xd7c0 + (wc >> 10);
ps->__count |= 0x80000000;
ps->__value.__wch = 0xdc00 + (wc & 0x3ff);
}
}
size_t
__mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
{
wchar_t buf[1];
struct __gconv_step_data data;
int status;
size_t result;
size_t dummy;
const unsigned char *inbuf;
char *outbuf = (char *) (pwc ?: buf);
/* Set information for this step. */
data.__invocation_counter = 0;
data.__internal_use = 1;
data.__flags = __GCONV_IS_LAST;
data.__statep = ps ?: &state;
data.__trans = NULL;
/* A first special case is if S is NULL. This means put PS in the
initial state. */
if (s == NULL)
{
outbuf = (char *) buf;
s = "";
n = 1;
}
/* Tell where we want the result. */
data.__outbuf = outbuf;
data.__outbufend = outbuf + sizeof (wchar_t);
/* Make sure we use the correct function. */
update_conversion_ptrs ();
/* Do a normal conversion. */
inbuf = (const unsigned char *) s;
status = DL_CALL_FCT (__wcsmbs_gconv_fcts.towc->__fct,
(__wcsmbs_gconv_fcts.towc, &data, &inbuf, inbuf + n,
NULL, &dummy, 0, 1));
/* There must not be any problems with the conversion but illegal input
characters. The output buffer must be large enough, otherwise the
definition of MB_CUR_MAX is not correct. All the other possible
errors also must not happen. */
assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT
|| status == __GCONV_ILLEGAL_INPUT
|| status == __GCONV_INCOMPLETE_INPUT
|| status == __GCONV_FULL_OUTPUT);
if (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT
|| status == __GCONV_FULL_OUTPUT)
{
if (data.__outbuf != (unsigned char *) outbuf
&& *(wchar_t *) outbuf == L'\0')
{
/* The converted character is the NUL character. */
assert (__mbsinit (data.__statep));
result = 0;
}
else
result = inbuf - (const unsigned char *) s;
}
else if (status == __GCONV_INCOMPLETE_INPUT)
result = (size_t) -2;
else
{
result = (size_t) -1;
__set_errno (EILSEQ);
}
return result;
}
size_t
attribute_hidden
__mbsrtowcs_l (wchar_t *dst, const char **src, size_t len, mbstate_t *ps,
locale_t l)
{
struct __gconv_step_data data;
size_t result;
int status;
struct __gconv_step *towc;
size_t non_reversible;
const struct gconv_fcts *fcts;
/* Tell where we want the result. */
data.__invocation_counter = 0;
data.__internal_use = 1;
data.__flags = __GCONV_IS_LAST;
data.__statep = ps;
/* Get the conversion functions. */
fcts = get_gconv_fcts (l->__locales[LC_CTYPE]);
/* Get the structure with the function pointers. */
towc = fcts->towc;
__gconv_fct fct = towc->__fct;
#ifdef PTR_DEMANGLE
if (towc->__shlib_handle != NULL)
PTR_DEMANGLE (fct);
#endif
/* We have to handle DST == NULL special. */
if (dst == NULL)
{
mbstate_t temp_state;
wchar_t buf[64]; /* Just an arbitrary size. */
const unsigned char *inbuf = (const unsigned char *) *src;
const unsigned char *srcend = inbuf + strlen (*src) + 1;
temp_state = *data.__statep;
data.__statep = &temp_state;
result = 0;
data.__outbufend = (unsigned char *) buf + sizeof (buf);
do
{
data.__outbuf = (unsigned char *) buf;
status = DL_CALL_FCT (fct, (towc, &data, &inbuf, srcend, NULL,
&non_reversible, 0, 1));
result += (wchar_t *) data.__outbuf - buf;
}
while (status == __GCONV_FULL_OUTPUT);
if (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT)
{
/* There better should be a NUL wide char at the end. */
assert (((wchar_t *) data.__outbuf)[-1] == L'\0');
/* Don't count the NUL character in. */
--result;
}
}
else
{
/* This code is based on the safe assumption that all internal
multi-byte encodings use the NUL byte only to mark the end
of the string. */
const unsigned char *srcp = (const unsigned char *) *src;
const unsigned char *srcend;
data.__outbuf = (unsigned char *) dst;
data.__outbufend = data.__outbuf + len * sizeof (wchar_t);
status = __GCONV_FULL_OUTPUT;
while (len > 0)
{
/* Pessimistic guess as to how much input we can use. In the
worst case we need one input byte for one output wchar_t. */
srcend = srcp + __strnlen ((const char *) srcp, len) + 1;
status = DL_CALL_FCT (fct, (towc, &data, &srcp, srcend, NULL,
&non_reversible, 0, 1));
if ((status != __GCONV_EMPTY_INPUT
&& status != __GCONV_INCOMPLETE_INPUT)
/* Not all input read. */
|| srcp != srcend
/* Reached the end of the input. */
|| srcend[-1] == '\0')
break;
len = (wchar_t *) data.__outbufend - (wchar_t *) data.__outbuf;
}
/* Make the end if the input known to the caller. */
*src = (const char *) srcp;
result = (wchar_t *) data.__outbuf - dst;
/* We have to determine whether the last character converted
is the NUL character. */
if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT)
&& ((wchar_t *) dst)[result - 1] == L'\0')
{
assert (result > 0);
assert (__mbsinit (data.__statep));
*src = NULL;
--result;
}
}
/* There must not be any problems with the conversion but illegal input
characters. */
assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT
|| status == __GCONV_ILLEGAL_INPUT
|| status == __GCONV_INCOMPLETE_INPUT
|| status == __GCONV_FULL_OUTPUT);
if (status != __GCONV_OK && status != __GCONV_FULL_OUTPUT
&& status != __GCONV_EMPTY_INPUT && status != __GCONV_INCOMPLETE_INPUT)
{
result = (size_t) -1;
__set_errno (EILSEQ);
}
return result;
}