/* Copyright (C) 1999 Free Software Foundation, Inc. This file is part of the GNU IO Library. This library is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this library; see the file COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. As a special exception, if you link this library with files compiled with a GNU compiler to produce an executable, this does not cause the resulting executable to be covered by the GNU General Public License. This exception does not however invalidate any other reasons why the executable file might be covered by the GNU General Public License. */ #include <libioP.h> #ifdef _LIBC # include <wchar.h> #endif #include <stdlib.h> #include <string.h> #ifdef _LIBC # include <langinfo.h> # include <locale/localeinfo.h> # include <wcsmbs/wcsmbsload.h> #endif /* 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. */ static 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 (fp, mode) _IO_FILE *fp; int mode; { /* Normalize the value. */ mode = mode < 0 ? -1 : (mode == 0 ? 0 : 1); if (mode == 0 || fp->_mode != 0) /* The caller simply wants to know about the current orientation or the orientation already has been determined. */ return fp->_mode; _IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile, fp); _IO_flockfile (fp); /* Set the orientation appropriately. */ if (mode > 0) { fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end; fp->_wide_data->_IO_write_ptr = fp->_wide_data->_IO_write_base; /* 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)); /* Get the character conversion functions based on the currently selected locale for LC_CTYPE. */ #ifdef _LIBC { struct gconv_fcts fcts; struct _IO_codecvt *cc = &fp->_wide_data->_codecvt; __wcsmbs_clone_conv (&fcts); /* The functions are always the same. */ *cc = libio_codecvt; cc->__cd_in.__cd.__nsteps = 1; /* Only one step allowed. */ 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].__is_last = 1; cc->__cd_in.__cd.__data[0].__statep = &fp->_wide_data->_IO_state; cc->__cd_out.__cd.__nsteps = 1; /* Only one step allowed. */ 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].__is_last = 1; cc->__cd_out.__cd.__data[0].__statep = &fp->_wide_data->_IO_state; } #else # error "somehow determine this from LC_CTYPE" #endif /* From now on use the wide character callback functions. */ ((struct _IO_FILE_plus *) fp)->vtable = fp->_wide_data->_wide_vtable; } /* Set the mode now. */ fp->_mode = mode; _IO_funlockfile (fp); _IO_cleanup_region_end (0); return mode; } #ifdef weak_alias weak_alias (_IO_fwide, fwide) #endif 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; #ifdef _LIBC struct __gconv_step *gs = codecvt->__cd_out.__cd.__steps; int status; size_t written; const unsigned char *from_start_copy = (unsigned char *) from_start; codecvt->__cd_out.__cd.__data[0].__outbuf = to_start; codecvt->__cd_out.__cd.__data[0].__outbufend = to_end; codecvt->__cd_out.__cd.__data[0].__statep = statep; status = (*gs->__fct) (gs, codecvt->__cd_out.__cd.__data, &from_start_copy, (const unsigned char *) from_end, &written, 0); *from_stop = (wchar_t *) from_start_copy; *to_stop = 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; } #else /* Decide what to do. */ result = __codecvt_error; #endif 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; #ifdef _LIBC struct __gconv_step *gs = codecvt->__cd_out.__cd.__steps; int status; size_t written; codecvt->__cd_out.__cd.__data[0].__outbuf = to_start; codecvt->__cd_out.__cd.__data[0].__outbufend = to_end; codecvt->__cd_out.__cd.__data[0].__statep = statep; status = (*gs->__fct) (gs, codecvt->__cd_out.__cd.__data, NULL, NULL, &written, 1); *to_stop = 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; } #else /* Decide what to do. */ result = __codecvt_error; #endif 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; #ifdef _LIBC struct __gconv_step *gs = codecvt->__cd_in.__cd.__steps; int status; size_t written; const unsigned char *from_start_copy = (unsigned char *) from_start; codecvt->__cd_in.__cd.__data[0].__outbuf = (char *) to_start; codecvt->__cd_in.__cd.__data[0].__outbufend = (char *) to_end; codecvt->__cd_in.__cd.__data[0].__statep = statep; status = (*gs->__fct) (gs, codecvt->__cd_in.__cd.__data, &from_start_copy, from_end, &written, 0); *from_stop = 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; } #else /* Decide what to do. */ result = __codecvt_error; #endif return result; } static int do_encoding (struct _IO_codecvt *codecvt) { #ifdef _LIBC /* 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; #else /* Worst case scenario. */ return -1; #endif } 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; #ifdef _LIBC const unsigned char *cp = (const unsigned char *) from_start; wchar_t to_buf[max]; struct __gconv_step *gs = codecvt->__cd_in.__cd.__steps; int status; size_t written; codecvt->__cd_in.__cd.__data[0].__outbuf = (char *) to_buf; codecvt->__cd_in.__cd.__data[0].__outbufend = (char *) &to_buf[max]; codecvt->__cd_in.__cd.__data[0].__statep = statep; status = (*gs->__fct) (gs, codecvt->__cd_in.__cd.__data, &cp, from_end, &written, 0); result = cp - (const unsigned char *) from_start; #else /* Decide what to do. */ result = 0; #endif return result; } static int do_max_length (struct _IO_codecvt *codecvt) { #ifdef _LIBC return codecvt->__cd_in.__cd.__steps[0].__max_needed_from; #else return MB_CUR_MAX; #endif }