| /* Copyright (C) 1999-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| 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/>. |
| |
| As a special exception, if you link the code in this file with |
| files compiled with a GNU compiler to produce an executable, |
| that does not cause the resulting executable to be covered by |
| the GNU Lesser General Public License. This exception does not |
| however invalidate any other reasons why the executable file |
| might be covered by the GNU Lesser General Public License. |
| This exception applies to code released by its copyright holders |
| in files containing the exception. */ |
| |
| #include <libioP.h> |
| #include <dlfcn.h> |
| #include <wchar.h> |
| #include <assert.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <langinfo.h> |
| #include <locale/localeinfo.h> |
| #include <wcsmbs/wcsmbsload.h> |
| #include <iconv/gconv_int.h> |
| #include <shlib-compat.h> |
| #include <sysdep.h> |
| |
| |
| /* Prototypes of libio's codecvt functions. */ |
| static enum __codecvt_result do_out (struct _IO_codecvt *codecvt, |
| __mbstate_t *statep, |
| const wchar_t *from_start, |
| const wchar_t *from_end, |
| const wchar_t **from_stop, char *to_start, |
| char *to_end, char **to_stop); |
| static enum __codecvt_result do_unshift (struct _IO_codecvt *codecvt, |
| __mbstate_t *statep, char *to_start, |
| char *to_end, char **to_stop); |
| static enum __codecvt_result do_in (struct _IO_codecvt *codecvt, |
| __mbstate_t *statep, |
| const char *from_start, |
| const char *from_end, |
| const char **from_stop, wchar_t *to_start, |
| wchar_t *to_end, wchar_t **to_stop); |
| static int do_encoding (struct _IO_codecvt *codecvt); |
| static int do_length (struct _IO_codecvt *codecvt, __mbstate_t *statep, |
| const char *from_start, |
| const char *from_end, _IO_size_t max); |
| static int do_max_length (struct _IO_codecvt *codecvt); |
| static int do_always_noconv (struct _IO_codecvt *codecvt); |
| |
| |
| /* The functions used in `codecvt' for libio are always the same. */ |
| const struct _IO_codecvt __libio_codecvt = |
| { |
| .__codecvt_destr = NULL, /* Destructor, never used. */ |
| .__codecvt_do_out = do_out, |
| .__codecvt_do_unshift = do_unshift, |
| .__codecvt_do_in = do_in, |
| .__codecvt_do_encoding = do_encoding, |
| .__codecvt_do_always_noconv = do_always_noconv, |
| .__codecvt_do_length = do_length, |
| .__codecvt_do_max_length = do_max_length |
| }; |
| |
| |
| /* Return orientation of stream. If mode is nonzero try to change |
| the orientation first. */ |
| #undef _IO_fwide |
| int |
| _IO_fwide (_IO_FILE *fp, int mode) |
| { |
| /* Normalize the value. */ |
| mode = mode < 0 ? -1 : (mode == 0 ? 0 : 1); |
| |
| #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1) |
| if (__builtin_expect (&_IO_stdin_used == NULL, 0) |
| && (fp == _IO_stdin || fp == _IO_stdout || fp == _IO_stderr)) |
| /* This is for a stream in the glibc 2.0 format. */ |
| return -1; |
| #endif |
| |
| /* The orientation already has been determined. */ |
| if (fp->_mode != 0 |
| /* Or the caller simply wants to know about the current orientation. */ |
| || mode == 0) |
| return fp->_mode; |
| |
| /* Set the orientation appropriately. */ |
| if (mode > 0) |
| { |
| struct _IO_codecvt *cc = fp->_codecvt = &fp->_wide_data->_codecvt; |
| |
| fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end; |
| fp->_wide_data->_IO_write_ptr = fp->_wide_data->_IO_write_base; |
| |
| /* Get the character conversion functions based on the currently |
| selected locale for LC_CTYPE. */ |
| { |
| /* Clear the state. We start all over again. */ |
| memset (&fp->_wide_data->_IO_state, '\0', sizeof (__mbstate_t)); |
| memset (&fp->_wide_data->_IO_last_state, '\0', sizeof (__mbstate_t)); |
| |
| struct gconv_fcts fcts; |
| __wcsmbs_clone_conv (&fcts); |
| assert (fcts.towc_nsteps == 1); |
| assert (fcts.tomb_nsteps == 1); |
| |
| /* The functions are always the same. */ |
| *cc = __libio_codecvt; |
| |
| cc->__cd_in.__cd.__nsteps = fcts.towc_nsteps; |
| cc->__cd_in.__cd.__steps = fcts.towc; |
| |
| cc->__cd_in.__cd.__data[0].__invocation_counter = 0; |
| cc->__cd_in.__cd.__data[0].__internal_use = 1; |
| cc->__cd_in.__cd.__data[0].__flags = __GCONV_IS_LAST; |
| cc->__cd_in.__cd.__data[0].__statep = &fp->_wide_data->_IO_state; |
| |
| cc->__cd_out.__cd.__nsteps = fcts.tomb_nsteps; |
| cc->__cd_out.__cd.__steps = fcts.tomb; |
| |
| cc->__cd_out.__cd.__data[0].__invocation_counter = 0; |
| cc->__cd_out.__cd.__data[0].__internal_use = 1; |
| cc->__cd_out.__cd.__data[0].__flags |
| = __GCONV_IS_LAST | __GCONV_TRANSLIT; |
| cc->__cd_out.__cd.__data[0].__statep = &fp->_wide_data->_IO_state; |
| } |
| |
| /* From now on use the wide character callback functions. */ |
| _IO_JUMPS_FILE_plus (fp) = fp->_wide_data->_wide_vtable; |
| } |
| |
| /* Set the mode now. */ |
| fp->_mode = mode; |
| |
| return mode; |
| } |
| |
| |
| static enum __codecvt_result |
| do_out (struct _IO_codecvt *codecvt, __mbstate_t *statep, |
| const wchar_t *from_start, const wchar_t *from_end, |
| const wchar_t **from_stop, char *to_start, char *to_end, |
| char **to_stop) |
| { |
| enum __codecvt_result result; |
| |
| struct __gconv_step *gs = codecvt->__cd_out.__cd.__steps; |
| int status; |
| size_t dummy; |
| const unsigned char *from_start_copy = (unsigned char *) from_start; |
| |
| codecvt->__cd_out.__cd.__data[0].__outbuf = (unsigned char *) to_start; |
| codecvt->__cd_out.__cd.__data[0].__outbufend = (unsigned char *) to_end; |
| codecvt->__cd_out.__cd.__data[0].__statep = statep; |
| |
| __gconv_fct fct = gs->__fct; |
| #ifdef PTR_DEMANGLE |
| if (gs->__shlib_handle != NULL) |
| PTR_DEMANGLE (fct); |
| #endif |
| |
| status = DL_CALL_FCT (fct, |
| (gs, codecvt->__cd_out.__cd.__data, &from_start_copy, |
| (const unsigned char *) from_end, NULL, |
| &dummy, 0, 0)); |
| |
| *from_stop = (wchar_t *) from_start_copy; |
| *to_stop = (char *) codecvt->__cd_out.__cd.__data[0].__outbuf; |
| |
| switch (status) |
| { |
| case __GCONV_OK: |
| case __GCONV_EMPTY_INPUT: |
| result = __codecvt_ok; |
| break; |
| |
| case __GCONV_FULL_OUTPUT: |
| case __GCONV_INCOMPLETE_INPUT: |
| result = __codecvt_partial; |
| break; |
| |
| default: |
| result = __codecvt_error; |
| break; |
| } |
| |
| return result; |
| } |
| |
| |
| static enum __codecvt_result |
| do_unshift (struct _IO_codecvt *codecvt, __mbstate_t *statep, |
| char *to_start, char *to_end, char **to_stop) |
| { |
| enum __codecvt_result result; |
| |
| struct __gconv_step *gs = codecvt->__cd_out.__cd.__steps; |
| int status; |
| size_t dummy; |
| |
| codecvt->__cd_out.__cd.__data[0].__outbuf = (unsigned char *) to_start; |
| codecvt->__cd_out.__cd.__data[0].__outbufend = (unsigned char *) to_end; |
| codecvt->__cd_out.__cd.__data[0].__statep = statep; |
| |
| __gconv_fct fct = gs->__fct; |
| #ifdef PTR_DEMANGLE |
| if (gs->__shlib_handle != NULL) |
| PTR_DEMANGLE (fct); |
| #endif |
| |
| status = DL_CALL_FCT (fct, |
| (gs, codecvt->__cd_out.__cd.__data, NULL, NULL, |
| NULL, &dummy, 1, 0)); |
| |
| *to_stop = (char *) codecvt->__cd_out.__cd.__data[0].__outbuf; |
| |
| switch (status) |
| { |
| case __GCONV_OK: |
| case __GCONV_EMPTY_INPUT: |
| result = __codecvt_ok; |
| break; |
| |
| case __GCONV_FULL_OUTPUT: |
| case __GCONV_INCOMPLETE_INPUT: |
| result = __codecvt_partial; |
| break; |
| |
| default: |
| result = __codecvt_error; |
| break; |
| } |
| |
| return result; |
| } |
| |
| |
| static enum __codecvt_result |
| do_in (struct _IO_codecvt *codecvt, __mbstate_t *statep, |
| const char *from_start, const char *from_end, const char **from_stop, |
| wchar_t *to_start, wchar_t *to_end, wchar_t **to_stop) |
| { |
| enum __codecvt_result result; |
| |
| struct __gconv_step *gs = codecvt->__cd_in.__cd.__steps; |
| int status; |
| size_t dummy; |
| const unsigned char *from_start_copy = (unsigned char *) from_start; |
| |
| codecvt->__cd_in.__cd.__data[0].__outbuf = (unsigned char *) to_start; |
| codecvt->__cd_in.__cd.__data[0].__outbufend = (unsigned char *) to_end; |
| codecvt->__cd_in.__cd.__data[0].__statep = statep; |
| |
| __gconv_fct fct = gs->__fct; |
| #ifdef PTR_DEMANGLE |
| if (gs->__shlib_handle != NULL) |
| PTR_DEMANGLE (fct); |
| #endif |
| |
| status = DL_CALL_FCT (fct, |
| (gs, codecvt->__cd_in.__cd.__data, &from_start_copy, |
| (const unsigned char *) from_end, NULL, |
| &dummy, 0, 0)); |
| |
| *from_stop = (const char *) from_start_copy; |
| *to_stop = (wchar_t *) codecvt->__cd_in.__cd.__data[0].__outbuf; |
| |
| switch (status) |
| { |
| case __GCONV_OK: |
| case __GCONV_EMPTY_INPUT: |
| result = __codecvt_ok; |
| break; |
| |
| case __GCONV_FULL_OUTPUT: |
| case __GCONV_INCOMPLETE_INPUT: |
| result = __codecvt_partial; |
| break; |
| |
| default: |
| result = __codecvt_error; |
| break; |
| } |
| |
| return result; |
| } |
| |
| |
| static int |
| do_encoding (struct _IO_codecvt *codecvt) |
| { |
| /* See whether the encoding is stateful. */ |
| if (codecvt->__cd_in.__cd.__steps[0].__stateful) |
| return -1; |
| /* Fortunately not. Now determine the input bytes for the conversion |
| necessary for each wide character. */ |
| if (codecvt->__cd_in.__cd.__steps[0].__min_needed_from |
| != codecvt->__cd_in.__cd.__steps[0].__max_needed_from) |
| /* Not a constant value. */ |
| return 0; |
| |
| return codecvt->__cd_in.__cd.__steps[0].__min_needed_from; |
| } |
| |
| |
| static int |
| do_always_noconv (struct _IO_codecvt *codecvt) |
| { |
| return 0; |
| } |
| |
| |
| static int |
| do_length (struct _IO_codecvt *codecvt, __mbstate_t *statep, |
| const char *from_start, const char *from_end, _IO_size_t max) |
| { |
| int result; |
| const unsigned char *cp = (const unsigned char *) from_start; |
| wchar_t to_buf[max]; |
| struct __gconv_step *gs = codecvt->__cd_in.__cd.__steps; |
| size_t dummy; |
| |
| codecvt->__cd_in.__cd.__data[0].__outbuf = (unsigned char *) to_buf; |
| codecvt->__cd_in.__cd.__data[0].__outbufend = (unsigned char *) &to_buf[max]; |
| codecvt->__cd_in.__cd.__data[0].__statep = statep; |
| |
| __gconv_fct fct = gs->__fct; |
| #ifdef PTR_DEMANGLE |
| if (gs->__shlib_handle != NULL) |
| PTR_DEMANGLE (fct); |
| #endif |
| |
| DL_CALL_FCT (fct, |
| (gs, codecvt->__cd_in.__cd.__data, &cp, |
| (const unsigned char *) from_end, NULL, |
| &dummy, 0, 0)); |
| |
| result = cp - (const unsigned char *) from_start; |
| |
| return result; |
| } |
| |
| |
| static int |
| do_max_length (struct _IO_codecvt *codecvt) |
| { |
| return codecvt->__cd_in.__cd.__steps[0].__max_needed_from; |
| } |
