| /* |
| * Copyright (C) 2000-2002, 2005-2006, 2008-2009, 2011 Free Software Foundation, Inc. |
| * This file is part of the GNU LIBICONV Library. |
| * |
| * The GNU LIBICONV Library is free software; you can redistribute it |
| * and/or modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * The GNU LIBICONV 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 |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with the GNU LIBICONV Library; see the file COPYING.LIB. |
| * If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| /* This file defines three conversion loops: |
| - from wchar_t to anything else, |
| - from anything else to wchar_t, |
| - from wchar_t to wchar_t. |
| */ |
| |
| #if HAVE_WCRTOMB || HAVE_MBRTOWC |
| /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before |
| <wchar.h>. |
| BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be |
| included before <wchar.h>. |
| In some builds of uClibc, <wchar.h> is nonexistent and wchar_t is defined |
| by <stddef.h>. */ |
| # include <stddef.h> |
| # include <stdio.h> |
| # include <time.h> |
| # include <wchar.h> |
| # define BUF_SIZE 64 /* assume MB_LEN_MAX <= 64 */ |
| /* Some systems, like BeOS, have multibyte encodings but lack mbstate_t. */ |
| extern size_t mbrtowc (); |
| # ifdef mbstate_t |
| # define mbrtowc(pwc, s, n, ps) (mbrtowc)(pwc, s, n, 0) |
| # define mbsinit(ps) 1 |
| # endif |
| # ifndef mbsinit |
| # if !HAVE_MBSINIT |
| # define mbsinit(ps) 1 |
| # endif |
| # endif |
| #endif |
| |
| /* |
| * The first two conversion loops have an extended conversion descriptor. |
| */ |
| struct wchar_conv_struct { |
| struct conv_struct parent; |
| #if HAVE_WCRTOMB || HAVE_MBRTOWC |
| mbstate_t state; |
| #endif |
| }; |
| |
| |
| #if HAVE_WCRTOMB |
| |
| /* From wchar_t to anything else. */ |
| |
| #ifndef LIBICONV_PLUG |
| |
| #if 0 |
| |
| struct wc_to_mb_fallback_locals { |
| struct wchar_conv_struct * l_wcd; |
| char* l_outbuf; |
| size_t l_outbytesleft; |
| int l_errno; |
| }; |
| |
| /* A callback that writes a string given in the locale encoding. */ |
| static void wc_to_mb_write_replacement (const char *buf, size_t buflen, |
| void* callback_arg) |
| { |
| struct wc_to_mb_fallback_locals * plocals = |
| (struct wc_to_mb_fallback_locals *) callback_arg; |
| /* Do nothing if already encountered an error in a previous call. */ |
| if (plocals->l_errno == 0) { |
| /* Attempt to convert the passed buffer to the target encoding. |
| Here we don't support characters split across multiple calls. */ |
| const char* bufptr = buf; |
| size_t bufleft = buflen; |
| size_t res = unicode_loop_convert(&plocals->l_wcd->parent, |
| &bufptr,&bufleft, |
| &plocals->l_outbuf,&plocals->l_outbytesleft); |
| if (res == (size_t)(-1)) { |
| if (errno == EILSEQ || errno == EINVAL) |
| /* Invalid buf contents. */ |
| plocals->l_errno = EILSEQ; |
| else if (errno == E2BIG) |
| /* Output buffer too small. */ |
| plocals->l_errno = E2BIG; |
| else |
| abort(); |
| } else { |
| /* Successful conversion. */ |
| if (bufleft > 0) |
| abort(); |
| } |
| } |
| } |
| |
| #else |
| |
| struct wc_to_mb_fallback_locals { |
| char* l_outbuf; |
| size_t l_outbytesleft; |
| int l_errno; |
| }; |
| |
| /* A callback that writes a string given in the target encoding. */ |
| static void wc_to_mb_write_replacement (const char *buf, size_t buflen, |
| void* callback_arg) |
| { |
| struct wc_to_mb_fallback_locals * plocals = |
| (struct wc_to_mb_fallback_locals *) callback_arg; |
| /* Do nothing if already encountered an error in a previous call. */ |
| if (plocals->l_errno == 0) { |
| /* Attempt to copy the passed buffer to the output buffer. */ |
| if (plocals->l_outbytesleft < buflen) |
| plocals->l_errno = E2BIG; |
| else { |
| memcpy(plocals->l_outbuf, buf, buflen); |
| plocals->l_outbuf += buflen; |
| plocals->l_outbytesleft -= buflen; |
| } |
| } |
| } |
| |
| #endif |
| |
| #endif /* !LIBICONV_PLUG */ |
| |
| static size_t wchar_from_loop_convert (iconv_t icd, |
| const char* * inbuf, size_t *inbytesleft, |
| char* * outbuf, size_t *outbytesleft) |
| { |
| struct wchar_conv_struct * wcd = (struct wchar_conv_struct *) icd; |
| size_t result = 0; |
| while (*inbytesleft >= sizeof(wchar_t)) { |
| const wchar_t * inptr = (const wchar_t *) *inbuf; |
| size_t inleft = *inbytesleft; |
| char buf[BUF_SIZE]; |
| mbstate_t state = wcd->state; |
| size_t bufcount = 0; |
| while (inleft >= sizeof(wchar_t)) { |
| /* Convert one wchar_t to multibyte representation. */ |
| size_t count = wcrtomb(buf+bufcount,*inptr,&state); |
| if (count == (size_t)(-1)) { |
| /* Invalid input. */ |
| if (wcd->parent.discard_ilseq) { |
| count = 0; |
| } |
| #ifndef LIBICONV_PLUG |
| else if (wcd->parent.fallbacks.wc_to_mb_fallback != NULL) { |
| /* Drop the contents of buf[] accumulated so far, and instead |
| pass all queued wide characters to the fallback handler. */ |
| struct wc_to_mb_fallback_locals locals; |
| const wchar_t * fallback_inptr; |
| #if 0 |
| locals.l_wcd = wcd; |
| #endif |
| locals.l_outbuf = *outbuf; |
| locals.l_outbytesleft = *outbytesleft; |
| locals.l_errno = 0; |
| for (fallback_inptr = (const wchar_t *) *inbuf; |
| fallback_inptr <= inptr; |
| fallback_inptr++) |
| wcd->parent.fallbacks.wc_to_mb_fallback(*fallback_inptr, |
| wc_to_mb_write_replacement, |
| &locals, |
| wcd->parent.fallbacks.data); |
| if (locals.l_errno != 0) { |
| errno = locals.l_errno; |
| return -1; |
| } |
| wcd->state = state; |
| *inbuf = (const char *) (inptr + 1); |
| *inbytesleft = inleft - sizeof(wchar_t); |
| *outbuf = locals.l_outbuf; |
| *outbytesleft = locals.l_outbytesleft; |
| result += 1; |
| break; |
| } |
| #endif |
| else { |
| errno = EILSEQ; |
| return -1; |
| } |
| } |
| inptr++; |
| inleft -= sizeof(wchar_t); |
| bufcount += count; |
| if (count == 0) { |
| /* Continue, append next wchar_t. */ |
| } else { |
| /* Attempt to convert the accumulated multibyte representations |
| to the target encoding. */ |
| const char* bufptr = buf; |
| size_t bufleft = bufcount; |
| char* outptr = *outbuf; |
| size_t outleft = *outbytesleft; |
| size_t res = unicode_loop_convert(&wcd->parent, |
| &bufptr,&bufleft, |
| &outptr,&outleft); |
| if (res == (size_t)(-1)) { |
| if (errno == EILSEQ) |
| /* Invalid input. */ |
| return -1; |
| else if (errno == E2BIG) |
| /* Output buffer too small. */ |
| return -1; |
| else if (errno == EINVAL) { |
| /* Continue, append next wchar_t, but avoid buffer overrun. */ |
| if (bufcount + MB_CUR_MAX > BUF_SIZE) |
| abort(); |
| } else |
| abort(); |
| } else { |
| /* Successful conversion. */ |
| wcd->state = state; |
| *inbuf = (const char *) inptr; |
| *inbytesleft = inleft; |
| *outbuf = outptr; |
| *outbytesleft = outleft; |
| result += res; |
| break; |
| } |
| } |
| } |
| } |
| return result; |
| } |
| |
| static size_t wchar_from_loop_reset (iconv_t icd, |
| char* * outbuf, size_t *outbytesleft) |
| { |
| struct wchar_conv_struct * wcd = (struct wchar_conv_struct *) icd; |
| if (outbuf == NULL || *outbuf == NULL) { |
| /* Reset the states. */ |
| memset(&wcd->state,'\0',sizeof(mbstate_t)); |
| return unicode_loop_reset(&wcd->parent,NULL,NULL); |
| } else { |
| if (!mbsinit(&wcd->state)) { |
| mbstate_t state = wcd->state; |
| char buf[BUF_SIZE]; |
| size_t bufcount = wcrtomb(buf,(wchar_t)0,&state); |
| if (bufcount == (size_t)(-1) || bufcount == 0 || buf[bufcount-1] != '\0') |
| abort(); |
| else { |
| const char* bufptr = buf; |
| size_t bufleft = bufcount-1; |
| char* outptr = *outbuf; |
| size_t outleft = *outbytesleft; |
| size_t res = unicode_loop_convert(&wcd->parent, |
| &bufptr,&bufleft, |
| &outptr,&outleft); |
| if (res == (size_t)(-1)) { |
| if (errno == E2BIG) |
| return -1; |
| else |
| abort(); |
| } else { |
| res = unicode_loop_reset(&wcd->parent,&outptr,&outleft); |
| if (res == (size_t)(-1)) |
| return res; |
| else { |
| /* Successful. */ |
| wcd->state = state; |
| *outbuf = outptr; |
| *outbytesleft = outleft; |
| return 0; |
| } |
| } |
| } |
| } else |
| return unicode_loop_reset(&wcd->parent,outbuf,outbytesleft); |
| } |
| } |
| |
| #endif |
| |
| |
| #if HAVE_MBRTOWC |
| |
| /* From anything else to wchar_t. */ |
| |
| #ifndef LIBICONV_PLUG |
| |
| struct mb_to_wc_fallback_locals { |
| char* l_outbuf; |
| size_t l_outbytesleft; |
| int l_errno; |
| }; |
| |
| static void mb_to_wc_write_replacement (const wchar_t *buf, size_t buflen, |
| void* callback_arg) |
| { |
| struct mb_to_wc_fallback_locals * plocals = |
| (struct mb_to_wc_fallback_locals *) callback_arg; |
| /* Do nothing if already encountered an error in a previous call. */ |
| if (plocals->l_errno == 0) { |
| /* Attempt to copy the passed buffer to the output buffer. */ |
| if (plocals->l_outbytesleft < sizeof(wchar_t)*buflen) |
| plocals->l_errno = E2BIG; |
| else { |
| for (; buflen > 0; buf++, buflen--) { |
| *(wchar_t*) plocals->l_outbuf = *buf; |
| plocals->l_outbuf += sizeof(wchar_t); |
| plocals->l_outbytesleft -= sizeof(wchar_t); |
| } |
| } |
| } |
| } |
| |
| #endif /* !LIBICONV_PLUG */ |
| |
| static size_t wchar_to_loop_convert (iconv_t icd, |
| const char* * inbuf, size_t *inbytesleft, |
| char* * outbuf, size_t *outbytesleft) |
| { |
| struct wchar_conv_struct * wcd = (struct wchar_conv_struct *) icd; |
| size_t result = 0; |
| while (*inbytesleft > 0) { |
| size_t incount; |
| for (incount = 1; ; ) { |
| /* Here incount <= *inbytesleft. */ |
| char buf[BUF_SIZE]; |
| const char* inptr = *inbuf; |
| size_t inleft = incount; |
| char* bufptr = buf; |
| size_t bufleft = BUF_SIZE; |
| size_t res = unicode_loop_convert(&wcd->parent, |
| &inptr,&inleft, |
| &bufptr,&bufleft); |
| if (res == (size_t)(-1)) { |
| if (errno == EILSEQ) |
| /* Invalid input. */ |
| return -1; |
| else if (errno == EINVAL) { |
| /* Incomplete input. Next try with one more input byte. */ |
| } else |
| /* E2BIG shouldn't occur. */ |
| abort(); |
| } else { |
| /* Successful conversion. */ |
| size_t bufcount = bufptr-buf; /* = BUF_SIZE-bufleft */ |
| mbstate_t state = wcd->state; |
| wchar_t wc; |
| res = mbrtowc(&wc,buf,bufcount,&state); |
| if (res == (size_t)(-2)) { |
| /* Next try with one more input byte. */ |
| } else { |
| if (res == (size_t)(-1)) { |
| /* Invalid input. */ |
| if (wcd->parent.discard_ilseq) { |
| } |
| #ifndef LIBICONV_PLUG |
| else if (wcd->parent.fallbacks.mb_to_wc_fallback != NULL) { |
| /* Drop the contents of buf[] accumulated so far, and instead |
| pass all queued chars to the fallback handler. */ |
| struct mb_to_wc_fallback_locals locals; |
| locals.l_outbuf = *outbuf; |
| locals.l_outbytesleft = *outbytesleft; |
| locals.l_errno = 0; |
| wcd->parent.fallbacks.mb_to_wc_fallback(*inbuf, incount, |
| mb_to_wc_write_replacement, |
| &locals, |
| wcd->parent.fallbacks.data); |
| if (locals.l_errno != 0) { |
| errno = locals.l_errno; |
| return -1; |
| } |
| /* Restoring the state is not needed because it is the initial |
| state anyway: For all known locale encodings, the multibyte |
| to wchar_t conversion doesn't have shift state, and we have |
| excluded partial accumulated characters. */ |
| /* wcd->state = state; */ |
| *inbuf += incount; |
| *inbytesleft -= incount; |
| *outbuf = locals.l_outbuf; |
| *outbytesleft = locals.l_outbytesleft; |
| result += 1; |
| break; |
| } |
| #endif |
| else |
| return -1; |
| } else { |
| if (*outbytesleft < sizeof(wchar_t)) { |
| errno = E2BIG; |
| return -1; |
| } |
| *(wchar_t*) *outbuf = wc; |
| /* Restoring the state is not needed because it is the initial |
| state anyway: For all known locale encodings, the multibyte |
| to wchar_t conversion doesn't have shift state, and we have |
| excluded partial accumulated characters. */ |
| /* wcd->state = state; */ |
| *outbuf += sizeof(wchar_t); |
| *outbytesleft -= sizeof(wchar_t); |
| } |
| *inbuf += incount; |
| *inbytesleft -= incount; |
| result += res; |
| break; |
| } |
| } |
| incount++; |
| if (incount > *inbytesleft) { |
| /* Incomplete input. */ |
| errno = EINVAL; |
| return -1; |
| } |
| } |
| } |
| return result; |
| } |
| |
| static size_t wchar_to_loop_reset (iconv_t icd, |
| char* * outbuf, size_t *outbytesleft) |
| { |
| struct wchar_conv_struct * wcd = (struct wchar_conv_struct *) icd; |
| size_t res = unicode_loop_reset(&wcd->parent,outbuf,outbytesleft); |
| if (res == (size_t)(-1)) |
| return res; |
| memset(&wcd->state,0,sizeof(mbstate_t)); |
| return 0; |
| } |
| |
| #endif |
| |
| |
| /* From wchar_t to wchar_t. */ |
| |
| static size_t wchar_id_loop_convert (iconv_t icd, |
| const char* * inbuf, size_t *inbytesleft, |
| char* * outbuf, size_t *outbytesleft) |
| { |
| struct conv_struct * cd = (struct conv_struct *) icd; |
| const wchar_t* inptr = (const wchar_t*) *inbuf; |
| size_t inleft = *inbytesleft / sizeof(wchar_t); |
| wchar_t* outptr = (wchar_t*) *outbuf; |
| size_t outleft = *outbytesleft / sizeof(wchar_t); |
| size_t count = (inleft <= outleft ? inleft : outleft); |
| if (count > 0) { |
| *inbytesleft -= count * sizeof(wchar_t); |
| *outbytesleft -= count * sizeof(wchar_t); |
| do { |
| wchar_t wc = *inptr++; |
| *outptr++ = wc; |
| #ifndef LIBICONV_PLUG |
| if (cd->hooks.wc_hook) |
| (*cd->hooks.wc_hook)(wc, cd->hooks.data); |
| #endif |
| } while (--count > 0); |
| *inbuf = (const char*) inptr; |
| *outbuf = (char*) outptr; |
| } |
| return 0; |
| } |
| |
| static size_t wchar_id_loop_reset (iconv_t icd, |
| char* * outbuf, size_t *outbytesleft) |
| { |
| return 0; |
| } |
