| /* |
| * Copyright (C) 1999-2003, 2005-2006, 2008 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 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 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with the GNU LIBICONV Library; see the file COPYING.LIB. |
| * If not, see <https://www.gnu.org/licenses/>. |
| */ |
| |
| /* This file defines the conversion loop via Unicode as a pivot encoding. */ |
| |
| /* Attempt to transliterate wc. Return code as in xxx_wctomb. */ |
| static int unicode_transliterate (conv_t cd, ucs4_t wc, |
| unsigned char* outptr, size_t outleft) |
| { |
| if (cd->oflags & HAVE_HANGUL_JAMO) { |
| /* Decompose Hangul into Jamo. Use double-width Jamo (contained |
| in all Korean encodings and ISO-2022-JP-2), not half-width Jamo |
| (contained in Unicode only). */ |
| ucs4_t buf[3]; |
| int ret = johab_hangul_decompose(cd,buf,wc); |
| if (ret != RET_ILUNI) { |
| /* we know 1 <= ret <= 3 */ |
| state_t backup_state = cd->ostate; |
| unsigned char* backup_outptr = outptr; |
| size_t backup_outleft = outleft; |
| int i, sub_outcount; |
| for (i = 0; i < ret; i++) { |
| if (outleft == 0) { |
| sub_outcount = RET_TOOSMALL; |
| goto johab_hangul_failed; |
| } |
| sub_outcount = cd->ofuncs.xxx_wctomb(cd,outptr,buf[i],outleft); |
| if (sub_outcount <= RET_ILUNI) |
| goto johab_hangul_failed; |
| if (!(sub_outcount <= outleft)) abort(); |
| outptr += sub_outcount; outleft -= sub_outcount; |
| } |
| return outptr-backup_outptr; |
| johab_hangul_failed: |
| cd->ostate = backup_state; |
| outptr = backup_outptr; |
| outleft = backup_outleft; |
| if (sub_outcount != RET_ILUNI) |
| return RET_TOOSMALL; |
| } |
| } |
| { |
| /* Try to use a variant, but postfix it with |
| U+303E IDEOGRAPHIC VARIATION INDICATOR |
| (cf. Ken Lunde's "CJKV information processing", p. 188). */ |
| int indx = -1; |
| if (wc == 0x3006) |
| indx = 0; |
| else if (wc == 0x30f6) |
| indx = 1; |
| else if (wc >= 0x4e00 && wc < 0xa000) |
| indx = cjk_variants_indx[wc-0x4e00]; |
| if (indx >= 0) { |
| for (;; indx++) { |
| ucs4_t buf[2]; |
| unsigned short variant = cjk_variants[indx]; |
| unsigned short last = variant & 0x8000; |
| variant &= 0x7fff; |
| variant += 0x3000; |
| buf[0] = variant; buf[1] = 0x303e; |
| { |
| state_t backup_state = cd->ostate; |
| unsigned char* backup_outptr = outptr; |
| size_t backup_outleft = outleft; |
| int i, sub_outcount; |
| for (i = 0; i < 2; i++) { |
| if (outleft == 0) { |
| sub_outcount = RET_TOOSMALL; |
| goto variant_failed; |
| } |
| sub_outcount = cd->ofuncs.xxx_wctomb(cd,outptr,buf[i],outleft); |
| if (sub_outcount <= RET_ILUNI) |
| goto variant_failed; |
| if (!(sub_outcount <= outleft)) abort(); |
| outptr += sub_outcount; outleft -= sub_outcount; |
| } |
| return outptr-backup_outptr; |
| variant_failed: |
| cd->ostate = backup_state; |
| outptr = backup_outptr; |
| outleft = backup_outleft; |
| if (sub_outcount != RET_ILUNI) |
| return RET_TOOSMALL; |
| } |
| if (last) |
| break; |
| } |
| } |
| } |
| if (wc >= 0x2018 && wc <= 0x201a) { |
| /* Special case for quotation marks 0x2018, 0x2019, 0x201a */ |
| ucs4_t substitute = |
| (cd->oflags & HAVE_QUOTATION_MARKS |
| ? (wc == 0x201a ? 0x2018 : wc) |
| : (cd->oflags & HAVE_ACCENTS |
| ? (wc==0x2019 ? 0x00b4 : 0x0060) /* use accents */ |
| : 0x0027 /* use apostrophe */ |
| ) ); |
| int outcount = cd->ofuncs.xxx_wctomb(cd,outptr,substitute,outleft); |
| if (outcount != RET_ILUNI) |
| return outcount; |
| } |
| { |
| /* Use the transliteration table. */ |
| int indx = translit_index(wc); |
| if (indx >= 0) { |
| const unsigned int * cp = &translit_data[indx]; |
| unsigned int num = *cp++; |
| state_t backup_state = cd->ostate; |
| unsigned char* backup_outptr = outptr; |
| size_t backup_outleft = outleft; |
| unsigned int i; |
| int sub_outcount; |
| for (i = 0; i < num; i++) { |
| if (outleft == 0) { |
| sub_outcount = RET_TOOSMALL; |
| goto translit_failed; |
| } |
| sub_outcount = cd->ofuncs.xxx_wctomb(cd,outptr,cp[i],outleft); |
| if (sub_outcount == RET_ILUNI) |
| /* Recursive transliteration. */ |
| sub_outcount = unicode_transliterate(cd,cp[i],outptr,outleft); |
| if (sub_outcount <= RET_ILUNI) |
| goto translit_failed; |
| if (!(sub_outcount <= outleft)) abort(); |
| outptr += sub_outcount; outleft -= sub_outcount; |
| } |
| return outptr-backup_outptr; |
| translit_failed: |
| cd->ostate = backup_state; |
| outptr = backup_outptr; |
| outleft = backup_outleft; |
| if (sub_outcount != RET_ILUNI) |
| return RET_TOOSMALL; |
| } |
| } |
| return RET_ILUNI; |
| } |
| |
| #ifndef LIBICONV_PLUG |
| |
| struct uc_to_mb_fallback_locals { |
| unsigned char* l_outbuf; |
| size_t l_outbytesleft; |
| int l_errno; |
| }; |
| |
| static void uc_to_mb_write_replacement (const char *buf, size_t buflen, |
| void* callback_arg) |
| { |
| struct uc_to_mb_fallback_locals * plocals = |
| (struct uc_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; |
| } |
| } |
| } |
| |
| struct mb_to_uc_fallback_locals { |
| conv_t l_cd; |
| unsigned char* l_outbuf; |
| size_t l_outbytesleft; |
| int l_errno; |
| }; |
| |
| static void mb_to_uc_write_replacement (const unsigned int *buf, size_t buflen, |
| void* callback_arg) |
| { |
| struct mb_to_uc_fallback_locals * plocals = |
| (struct mb_to_uc_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. */ |
| conv_t cd = plocals->l_cd; |
| unsigned char* outptr = plocals->l_outbuf; |
| size_t outleft = plocals->l_outbytesleft; |
| for (; buflen > 0; buf++, buflen--) { |
| ucs4_t wc = *buf; |
| int outcount; |
| if (outleft == 0) { |
| plocals->l_errno = E2BIG; |
| break; |
| } |
| outcount = cd->ofuncs.xxx_wctomb(cd,outptr,wc,outleft); |
| if (outcount != RET_ILUNI) |
| goto outcount_ok; |
| /* Handle Unicode tag characters (range U+E0000..U+E007F). */ |
| if ((wc >> 7) == (0xe0000 >> 7)) |
| goto outcount_zero; |
| /* Try transliteration. */ |
| if (cd->transliterate) { |
| outcount = unicode_transliterate(cd,wc,outptr,outleft); |
| if (outcount != RET_ILUNI) |
| goto outcount_ok; |
| } |
| if (cd->discard_ilseq) { |
| outcount = 0; |
| goto outcount_ok; |
| } |
| #ifndef LIBICONV_PLUG |
| else if (cd->fallbacks.uc_to_mb_fallback != NULL) { |
| struct uc_to_mb_fallback_locals locals; |
| locals.l_outbuf = outptr; |
| locals.l_outbytesleft = outleft; |
| locals.l_errno = 0; |
| cd->fallbacks.uc_to_mb_fallback(wc, |
| uc_to_mb_write_replacement, |
| &locals, |
| cd->fallbacks.data); |
| if (locals.l_errno != 0) { |
| plocals->l_errno = locals.l_errno; |
| break; |
| } |
| outptr = locals.l_outbuf; |
| outleft = locals.l_outbytesleft; |
| outcount = 0; |
| goto outcount_ok; |
| } |
| #endif |
| outcount = cd->ofuncs.xxx_wctomb(cd,outptr,0xFFFD,outleft); |
| if (outcount != RET_ILUNI) |
| goto outcount_ok; |
| plocals->l_errno = EILSEQ; |
| break; |
| outcount_ok: |
| if (outcount < 0) { |
| plocals->l_errno = E2BIG; |
| break; |
| } |
| #ifndef LIBICONV_PLUG |
| if (cd->hooks.uc_hook) |
| (*cd->hooks.uc_hook)(wc, cd->hooks.data); |
| #endif |
| if (!(outcount <= outleft)) abort(); |
| outptr += outcount; outleft -= outcount; |
| outcount_zero: ; |
| } |
| plocals->l_outbuf = outptr; |
| plocals->l_outbytesleft = outleft; |
| } |
| } |
| |
| #endif /* !LIBICONV_PLUG */ |
| |
| static size_t unicode_loop_convert (iconv_t icd, |
| const char* * inbuf, size_t *inbytesleft, |
| char* * outbuf, size_t *outbytesleft) |
| { |
| conv_t cd = (conv_t) icd; |
| size_t result = 0; |
| const unsigned char* inptr = (const unsigned char*) *inbuf; |
| size_t inleft = *inbytesleft; |
| unsigned char* outptr = (unsigned char*) *outbuf; |
| size_t outleft = *outbytesleft; |
| while (inleft > 0) { |
| state_t last_istate = cd->istate; |
| ucs4_t wc; |
| int incount; |
| int outcount; |
| incount = cd->ifuncs.xxx_mbtowc(cd,&wc,inptr,inleft); |
| if (incount < 0) { |
| if ((unsigned int)(-1-incount) % 2 == (unsigned int)(-1-RET_ILSEQ) % 2) { |
| /* Case 1: invalid input, possibly after a shift sequence */ |
| incount = DECODE_SHIFT_ILSEQ(incount); |
| if (cd->discard_ilseq) { |
| switch (cd->iindex) { |
| case ei_ucs4: case ei_ucs4be: case ei_ucs4le: |
| case ei_utf32: case ei_utf32be: case ei_utf32le: |
| case ei_ucs4internal: case ei_ucs4swapped: |
| incount += 4; break; |
| case ei_ucs2: case ei_ucs2be: case ei_ucs2le: |
| case ei_utf16: case ei_utf16be: case ei_utf16le: |
| case ei_ucs2internal: case ei_ucs2swapped: |
| incount += 2; break; |
| default: |
| incount += 1; break; |
| } |
| goto outcount_zero; |
| } |
| #ifndef LIBICONV_PLUG |
| else if (cd->fallbacks.mb_to_uc_fallback != NULL) { |
| unsigned int incount2; |
| struct mb_to_uc_fallback_locals locals; |
| switch (cd->iindex) { |
| case ei_ucs4: case ei_ucs4be: case ei_ucs4le: |
| case ei_utf32: case ei_utf32be: case ei_utf32le: |
| case ei_ucs4internal: case ei_ucs4swapped: |
| incount2 = 4; break; |
| case ei_ucs2: case ei_ucs2be: case ei_ucs2le: |
| case ei_utf16: case ei_utf16be: case ei_utf16le: |
| case ei_ucs2internal: case ei_ucs2swapped: |
| incount2 = 2; break; |
| default: |
| incount2 = 1; break; |
| } |
| locals.l_cd = cd; |
| locals.l_outbuf = outptr; |
| locals.l_outbytesleft = outleft; |
| locals.l_errno = 0; |
| cd->fallbacks.mb_to_uc_fallback((const char*)inptr+incount, incount2, |
| mb_to_uc_write_replacement, |
| &locals, |
| cd->fallbacks.data); |
| if (locals.l_errno != 0) { |
| inptr += incount; inleft -= incount; |
| errno = locals.l_errno; |
| result = -1; |
| break; |
| } |
| incount += incount2; |
| outptr = locals.l_outbuf; |
| outleft = locals.l_outbytesleft; |
| result += 1; |
| goto outcount_zero; |
| } |
| #endif |
| inptr += incount; inleft -= incount; |
| errno = EILSEQ; |
| result = -1; |
| break; |
| } |
| if (incount == RET_TOOFEW(0)) { |
| /* Case 2: not enough bytes available to detect anything */ |
| errno = EINVAL; |
| result = -1; |
| break; |
| } |
| /* Case 3: k bytes read, but only a shift sequence */ |
| incount = DECODE_TOOFEW(incount); |
| } else { |
| /* Case 4: k bytes read, making up a wide character */ |
| if (outleft == 0) { |
| cd->istate = last_istate; |
| errno = E2BIG; |
| result = -1; |
| break; |
| } |
| outcount = cd->ofuncs.xxx_wctomb(cd,outptr,wc,outleft); |
| if (outcount != RET_ILUNI) |
| goto outcount_ok; |
| /* Handle Unicode tag characters (range U+E0000..U+E007F). */ |
| if ((wc >> 7) == (0xe0000 >> 7)) |
| goto outcount_zero; |
| /* Try transliteration. */ |
| result++; |
| if (cd->transliterate) { |
| outcount = unicode_transliterate(cd,wc,outptr,outleft); |
| if (outcount != RET_ILUNI) |
| goto outcount_ok; |
| } |
| if (cd->discard_ilseq) { |
| outcount = 0; |
| goto outcount_ok; |
| } |
| #ifndef LIBICONV_PLUG |
| else if (cd->fallbacks.uc_to_mb_fallback != NULL) { |
| struct uc_to_mb_fallback_locals locals; |
| locals.l_outbuf = outptr; |
| locals.l_outbytesleft = outleft; |
| locals.l_errno = 0; |
| cd->fallbacks.uc_to_mb_fallback(wc, |
| uc_to_mb_write_replacement, |
| &locals, |
| cd->fallbacks.data); |
| if (locals.l_errno != 0) { |
| cd->istate = last_istate; |
| errno = locals.l_errno; |
| return -1; |
| } |
| outptr = locals.l_outbuf; |
| outleft = locals.l_outbytesleft; |
| outcount = 0; |
| goto outcount_ok; |
| } |
| #endif |
| outcount = cd->ofuncs.xxx_wctomb(cd,outptr,0xFFFD,outleft); |
| if (outcount != RET_ILUNI) |
| goto outcount_ok; |
| cd->istate = last_istate; |
| errno = EILSEQ; |
| result = -1; |
| break; |
| outcount_ok: |
| if (outcount < 0) { |
| cd->istate = last_istate; |
| errno = E2BIG; |
| result = -1; |
| break; |
| } |
| #ifndef LIBICONV_PLUG |
| if (cd->hooks.uc_hook) |
| (*cd->hooks.uc_hook)(wc, cd->hooks.data); |
| #endif |
| if (!(outcount <= outleft)) abort(); |
| outptr += outcount; outleft -= outcount; |
| } |
| outcount_zero: |
| if (!(incount <= inleft)) abort(); |
| inptr += incount; inleft -= incount; |
| } |
| *inbuf = (const char*) inptr; |
| *inbytesleft = inleft; |
| *outbuf = (char*) outptr; |
| *outbytesleft = outleft; |
| return result; |
| } |
| |
| static size_t unicode_loop_reset (iconv_t icd, |
| char* * outbuf, size_t *outbytesleft) |
| { |
| conv_t cd = (conv_t) icd; |
| if (outbuf == NULL || *outbuf == NULL) { |
| /* Reset the states. */ |
| memset(&cd->istate,'\0',sizeof(state_t)); |
| memset(&cd->ostate,'\0',sizeof(state_t)); |
| return 0; |
| } else { |
| size_t result = 0; |
| if (cd->ifuncs.xxx_flushwc) { |
| state_t last_istate = cd->istate; |
| ucs4_t wc; |
| if (cd->ifuncs.xxx_flushwc(cd, &wc)) { |
| unsigned char* outptr = (unsigned char*) *outbuf; |
| size_t outleft = *outbytesleft; |
| int outcount = cd->ofuncs.xxx_wctomb(cd,outptr,wc,outleft); |
| if (outcount != RET_ILUNI) |
| goto outcount_ok; |
| /* Handle Unicode tag characters (range U+E0000..U+E007F). */ |
| if ((wc >> 7) == (0xe0000 >> 7)) |
| goto outcount_zero; |
| /* Try transliteration. */ |
| result++; |
| if (cd->transliterate) { |
| outcount = unicode_transliterate(cd,wc,outptr,outleft); |
| if (outcount != RET_ILUNI) |
| goto outcount_ok; |
| } |
| if (cd->discard_ilseq) { |
| outcount = 0; |
| goto outcount_ok; |
| } |
| #ifndef LIBICONV_PLUG |
| else if (cd->fallbacks.uc_to_mb_fallback != NULL) { |
| struct uc_to_mb_fallback_locals locals; |
| locals.l_outbuf = outptr; |
| locals.l_outbytesleft = outleft; |
| locals.l_errno = 0; |
| cd->fallbacks.uc_to_mb_fallback(wc, |
| uc_to_mb_write_replacement, |
| &locals, |
| cd->fallbacks.data); |
| if (locals.l_errno != 0) { |
| cd->istate = last_istate; |
| errno = locals.l_errno; |
| return -1; |
| } |
| outptr = locals.l_outbuf; |
| outleft = locals.l_outbytesleft; |
| outcount = 0; |
| goto outcount_ok; |
| } |
| #endif |
| outcount = cd->ofuncs.xxx_wctomb(cd,outptr,0xFFFD,outleft); |
| if (outcount != RET_ILUNI) |
| goto outcount_ok; |
| cd->istate = last_istate; |
| errno = EILSEQ; |
| return -1; |
| outcount_ok: |
| if (outcount < 0) { |
| cd->istate = last_istate; |
| errno = E2BIG; |
| return -1; |
| } |
| #ifndef LIBICONV_PLUG |
| if (cd->hooks.uc_hook) |
| (*cd->hooks.uc_hook)(wc, cd->hooks.data); |
| #endif |
| if (!(outcount <= outleft)) abort(); |
| outptr += outcount; |
| outleft -= outcount; |
| outcount_zero: |
| *outbuf = (char*) outptr; |
| *outbytesleft = outleft; |
| } |
| } |
| if (cd->ofuncs.xxx_reset) { |
| unsigned char* outptr = (unsigned char*) *outbuf; |
| size_t outleft = *outbytesleft; |
| int outcount = cd->ofuncs.xxx_reset(cd,outptr,outleft); |
| if (outcount < 0) { |
| errno = E2BIG; |
| return -1; |
| } |
| if (!(outcount <= outleft)) abort(); |
| *outbuf = (char*) (outptr + outcount); |
| *outbytesleft = outleft - outcount; |
| } |
| memset(&cd->istate,'\0',sizeof(state_t)); |
| memset(&cd->ostate,'\0',sizeof(state_t)); |
| return result; |
| } |
| } |
