| /* Copyright (C) 1999-2000 Free Software Foundation, Inc. |
| This file is part of the GNU ICONV Library. |
| |
| The GNU ICONV 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 ICONV 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 ICONV Library; see the file COPYING.LIB. If not, |
| write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| /* This file defines the conversion loop via Unicode as a pivot encoding. */ |
| |
| 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) { |
| ucs4_t wc; |
| int incount; |
| int outcount; |
| incount = cd->ifuncs.xxx_mbtowc(cd,&wc,inptr,inleft); |
| if (incount <= 0) { |
| if (incount == 0) { |
| /* Case 1: invalid input */ |
| errno = EILSEQ; |
| result = -1; |
| break; |
| } |
| if (incount == -1) { |
| /* 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 = -1-incount; |
| } else { |
| /* Case 4: k bytes read, making up a wide character */ |
| if (outleft == 0) { |
| errno = E2BIG; |
| result = -1; |
| break; |
| } |
| outcount = cd->ofuncs.xxx_wctomb(cd,outptr,wc,outleft); |
| if (outcount != 0) |
| goto outcount_ok; |
| /* Try transliteration. */ |
| result++; |
| if (cd->transliterate) { |
| 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_ILSEQ) { |
| /* 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 <= 0) |
| goto johab_hangul_failed; |
| if (!(sub_outcount <= outleft)) abort(); |
| outptr += sub_outcount; outleft -= sub_outcount; |
| } |
| goto char_done; |
| johab_hangul_failed: |
| cd->ostate = backup_state; |
| outptr = backup_outptr; |
| outleft = backup_outleft; |
| if (sub_outcount < 0) { |
| errno = E2BIG; |
| result = -1; |
| break; |
| } |
| } |
| } |
| { |
| /* 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 <= 0) |
| goto variant_failed; |
| if (!(sub_outcount <= outleft)) abort(); |
| outptr += sub_outcount; outleft -= sub_outcount; |
| } |
| goto char_done; |
| variant_failed: |
| cd->ostate = backup_state; |
| outptr = backup_outptr; |
| outleft = backup_outleft; |
| if (sub_outcount < 0) { |
| errno = E2BIG; |
| result = -1; |
| break; |
| } |
| } |
| 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 */ |
| ) ); |
| outcount = cd->ofuncs.xxx_wctomb(cd,outptr,substitute,outleft); |
| if (outcount != 0) |
| goto outcount_ok; |
| } |
| { |
| /* Use the transliteration table. */ |
| int indx = translit_index(wc); |
| if (indx >= 0) { |
| const unsigned char * 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 <= 0) |
| goto translit_failed; |
| if (!(sub_outcount <= outleft)) abort(); |
| outptr += sub_outcount; outleft -= sub_outcount; |
| } |
| goto char_done; |
| translit_failed: |
| cd->ostate = backup_state; |
| outptr = backup_outptr; |
| outleft = backup_outleft; |
| if (sub_outcount < 0) { |
| errno = E2BIG; |
| result = -1; |
| break; |
| } |
| } |
| } |
| } |
| outcount = cd->ofuncs.xxx_wctomb(cd,outptr,0xFFFD,outleft); |
| if (outcount != 0) |
| goto outcount_ok; |
| errno = EILSEQ; |
| result = -1; |
| break; |
| outcount_ok: |
| if (outcount < 0) { |
| errno = E2BIG; |
| result = -1; |
| break; |
| } |
| if (!(outcount <= outleft)) abort(); |
| outptr += outcount; outleft -= outcount; |
| char_done: |
| ; |
| } |
| 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 { |
| if (cd->ofuncs.xxx_reset) { |
| int outcount = |
| cd->ofuncs.xxx_reset(cd, (unsigned char *) *outbuf, *outbytesleft); |
| if (outcount < 0) { |
| errno = E2BIG; |
| return -1; |
| } |
| *outbuf += outcount; *outbytesleft -= outcount; |
| } |
| memset(&cd->istate,'\0',sizeof(state_t)); |
| memset(&cd->ostate,'\0',sizeof(state_t)); |
| return 0; |
| } |
| } |
