272 lines
7.5 KiB
C
272 lines
7.5 KiB
C
/* Copyright (C) 1999-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>.
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As a special exception, if you link the code in this file with
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files compiled with a GNU compiler to produce an executable,
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that does not cause the resulting executable to be covered by
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the GNU Lesser General Public License. This exception does not
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however invalidate any other reasons why the executable file
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might be covered by the GNU Lesser General Public License.
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This exception applies to code released by its copyright holders
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in files containing the exception. */
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#include <libioP.h>
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#include <dlfcn.h>
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#include <wchar.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <langinfo.h>
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#include <locale/localeinfo.h>
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#include <wcsmbs/wcsmbsload.h>
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#include <iconv/gconv_int.h>
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#include <shlib-compat.h>
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#include <sysdep.h>
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/* Return orientation of stream. If mode is nonzero try to change
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the orientation first. */
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#undef _IO_fwide
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int
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_IO_fwide (FILE *fp, int mode)
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{
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/* Normalize the value. */
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mode = mode < 0 ? -1 : (mode == 0 ? 0 : 1);
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#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
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if (__glibc_unlikely (&_IO_stdin_used == NULL) && _IO_legacy_file (fp))
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/* This is for a stream in the glibc 2.0 format. */
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return -1;
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#endif
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/* The orientation already has been determined. */
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if (fp->_mode != 0
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/* Or the caller simply wants to know about the current orientation. */
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|| mode == 0)
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return fp->_mode;
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/* Set the orientation appropriately. */
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if (mode > 0)
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{
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struct _IO_codecvt *cc = fp->_codecvt = &fp->_wide_data->_codecvt;
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fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end;
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fp->_wide_data->_IO_write_ptr = fp->_wide_data->_IO_write_base;
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/* Get the character conversion functions based on the currently
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selected locale for LC_CTYPE. */
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{
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/* Clear the state. We start all over again. */
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memset (&fp->_wide_data->_IO_state, '\0', sizeof (__mbstate_t));
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memset (&fp->_wide_data->_IO_last_state, '\0', sizeof (__mbstate_t));
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struct gconv_fcts fcts;
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__wcsmbs_clone_conv (&fcts);
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assert (fcts.towc_nsteps == 1);
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assert (fcts.tomb_nsteps == 1);
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cc->__cd_in.step = fcts.towc;
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cc->__cd_in.step_data.__invocation_counter = 0;
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cc->__cd_in.step_data.__internal_use = 1;
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cc->__cd_in.step_data.__flags = __GCONV_IS_LAST;
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cc->__cd_in.step_data.__statep = &fp->_wide_data->_IO_state;
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cc->__cd_out.step = fcts.tomb;
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cc->__cd_out.step_data.__invocation_counter = 0;
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cc->__cd_out.step_data.__internal_use = 1;
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cc->__cd_out.step_data.__flags = __GCONV_IS_LAST | __GCONV_TRANSLIT;
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cc->__cd_out.step_data.__statep = &fp->_wide_data->_IO_state;
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}
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/* From now on use the wide character callback functions. */
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_IO_JUMPS_FILE_plus (fp) = fp->_wide_data->_wide_vtable;
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}
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/* Set the mode now. */
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fp->_mode = mode;
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return mode;
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}
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enum __codecvt_result
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__libio_codecvt_out (struct _IO_codecvt *codecvt, __mbstate_t *statep,
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const wchar_t *from_start, const wchar_t *from_end,
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const wchar_t **from_stop, char *to_start, char *to_end,
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char **to_stop)
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{
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enum __codecvt_result result;
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struct __gconv_step *gs = codecvt->__cd_out.step;
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int status;
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size_t dummy
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#if defined __ptr128__
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= 0
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#endif /* defined __ptr128__ */
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;
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const unsigned char *from_start_copy = (unsigned char *) from_start;
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codecvt->__cd_out.step_data.__outbuf = (unsigned char *) to_start;
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codecvt->__cd_out.step_data.__outbufend = (unsigned char *) to_end;
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codecvt->__cd_out.step_data.__statep = statep;
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__gconv_fct fct = gs->__fct;
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#ifdef PTR_DEMANGLE
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if (gs->__shlib_handle != NULL)
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PTR_DEMANGLE (fct);
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#endif
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status = DL_CALL_FCT (fct,
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(gs, &codecvt->__cd_out.step_data, &from_start_copy,
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(const unsigned char *) from_end, NULL,
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&dummy, 0, 0));
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*from_stop = (wchar_t *) from_start_copy;
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*to_stop = (char *) codecvt->__cd_out.step_data.__outbuf;
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switch (status)
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{
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case __GCONV_OK:
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case __GCONV_EMPTY_INPUT:
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result = __codecvt_ok;
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break;
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case __GCONV_FULL_OUTPUT:
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case __GCONV_INCOMPLETE_INPUT:
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result = __codecvt_partial;
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break;
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default:
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result = __codecvt_error;
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break;
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}
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return result;
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}
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enum __codecvt_result
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__libio_codecvt_in (struct _IO_codecvt *codecvt, __mbstate_t *statep,
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const char *from_start, const char *from_end,
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const char **from_stop,
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wchar_t *to_start, wchar_t *to_end, wchar_t **to_stop)
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{
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enum __codecvt_result result;
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struct __gconv_step *gs = codecvt->__cd_in.step;
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int status;
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size_t dummy
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#if defined __ptr128__
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= 0
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#endif /* defined __ptr128__ */
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;
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const unsigned char *from_start_copy = (unsigned char *) from_start;
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codecvt->__cd_in.step_data.__outbuf = (unsigned char *) to_start;
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codecvt->__cd_in.step_data.__outbufend = (unsigned char *) to_end;
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codecvt->__cd_in.step_data.__statep = statep;
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__gconv_fct fct = gs->__fct;
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#ifdef PTR_DEMANGLE
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if (gs->__shlib_handle != NULL)
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PTR_DEMANGLE (fct);
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#endif
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status = DL_CALL_FCT (fct,
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(gs, &codecvt->__cd_in.step_data, &from_start_copy,
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(const unsigned char *) from_end, NULL,
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&dummy, 0, 0));
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*from_stop = (const char *) from_start_copy;
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*to_stop = (wchar_t *) codecvt->__cd_in.step_data.__outbuf;
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switch (status)
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{
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case __GCONV_OK:
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case __GCONV_EMPTY_INPUT:
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result = __codecvt_ok;
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break;
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case __GCONV_FULL_OUTPUT:
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case __GCONV_INCOMPLETE_INPUT:
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result = __codecvt_partial;
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break;
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default:
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result = __codecvt_error;
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break;
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}
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return result;
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}
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int
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__libio_codecvt_encoding (struct _IO_codecvt *codecvt)
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{
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/* See whether the encoding is stateful. */
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if (codecvt->__cd_in.step->__stateful)
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return -1;
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/* Fortunately not. Now determine the input bytes for the conversion
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necessary for each wide character. */
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if (codecvt->__cd_in.step->__min_needed_from
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!= codecvt->__cd_in.step->__max_needed_from)
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/* Not a constant value. */
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return 0;
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return codecvt->__cd_in.step->__min_needed_from;
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}
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int
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__libio_codecvt_length (struct _IO_codecvt *codecvt, __mbstate_t *statep,
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const char *from_start, const char *from_end,
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size_t max)
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{
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int result;
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const unsigned char *cp = (const unsigned char *) from_start;
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wchar_t to_buf[max];
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struct __gconv_step *gs = codecvt->__cd_in.step;
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size_t dummy
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#if defined __ptr128__
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= 0
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#endif /* defined __ptr128__ */
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;
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codecvt->__cd_in.step_data.__outbuf = (unsigned char *) to_buf;
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codecvt->__cd_in.step_data.__outbufend = (unsigned char *) &to_buf[max];
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codecvt->__cd_in.step_data.__statep = statep;
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__gconv_fct fct = gs->__fct;
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#ifdef PTR_DEMANGLE
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if (gs->__shlib_handle != NULL)
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PTR_DEMANGLE (fct);
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#endif
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DL_CALL_FCT (fct,
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(gs, &codecvt->__cd_in.step_data, &cp,
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(const unsigned char *) from_end, NULL,
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&dummy, 0, 0));
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result = cp - (const unsigned char *) from_start;
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return result;
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}
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