glibc/wcsmbs/mbrtoc16.c
Florian Weimer ba7b4d294b Complete the removal of __gconv_translit_find
Prior to the 2.20 release, the function was just changed to fail
unconditionally, in commit a1a6a401ab.
This commit removes the function completely, including gconv bits
which depend on it.

This changes the gconv ABI, which is not a public interface.
2014-09-12 09:17:32 +02:00

152 lines
4.1 KiB
C

/* Copyright (C) 2011-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <assert.h>
#include <dlfcn.h>
#include <errno.h>
#include <gconv.h>
#include <uchar.h>
#include <wcsmbsload.h>
#include <sysdep.h>
#ifndef EILSEQ
# define EILSEQ EINVAL
#endif
/* This is the private state used if PS is NULL. */
static mbstate_t state;
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;
/* 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);
}
}
else if (status == __GCONV_INCOMPLETE_INPUT)
result = (size_t) -2;
else
{
ilseq:
result = (size_t) -1;
__set_errno (EILSEQ);
}
return result;
}