| /* Character set conversion. |
| Copyright (C) 1999-2001, 2007, 2009-2020 Free Software Foundation, Inc. |
| |
| This program 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 program 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 program; if not, see <https://www.gnu.org/licenses/>. */ |
| |
| #include <config.h> |
| |
| /* Specification. */ |
| #include <iconv.h> |
| |
| #include <stddef.h> |
| |
| #if REPLACE_ICONV_UTF |
| # include <errno.h> |
| # include <stdint.h> |
| # include <stdlib.h> |
| # include "unistr.h" |
| #endif |
| |
| #if REPLACE_ICONV_UTF |
| |
| /* UTF-{16,32}{BE,LE} converters taken from GNU libiconv 1.11. */ |
| |
| /* Return code if invalid. (xxx_mbtowc) */ |
| # define RET_ILSEQ -1 |
| /* Return code if no bytes were read. (xxx_mbtowc) */ |
| # define RET_TOOFEW -2 |
| |
| /* Return code if invalid. (xxx_wctomb) */ |
| # define RET_ILUNI -1 |
| /* Return code if output buffer is too small. (xxx_wctomb, xxx_reset) */ |
| # define RET_TOOSMALL -2 |
| |
| /* |
| * UTF-16BE |
| */ |
| |
| /* Specification: RFC 2781 */ |
| |
| static int |
| utf16be_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n) |
| { |
| if (n >= 2) |
| { |
| ucs4_t wc = (s[0] << 8) + s[1]; |
| if (wc >= 0xd800 && wc < 0xdc00) |
| { |
| if (n >= 4) |
| { |
| ucs4_t wc2 = (s[2] << 8) + s[3]; |
| if (!(wc2 >= 0xdc00 && wc2 < 0xe000)) |
| return RET_ILSEQ; |
| *pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00); |
| return 4; |
| } |
| } |
| else if (wc >= 0xdc00 && wc < 0xe000) |
| { |
| return RET_ILSEQ; |
| } |
| else |
| { |
| *pwc = wc; |
| return 2; |
| } |
| } |
| return RET_TOOFEW; |
| } |
| |
| static int |
| utf16be_wctomb (unsigned char *r, ucs4_t wc, size_t n) |
| { |
| if (!(wc >= 0xd800 && wc < 0xe000)) |
| { |
| if (wc < 0x10000) |
| { |
| if (n >= 2) |
| { |
| r[0] = (unsigned char) (wc >> 8); |
| r[1] = (unsigned char) wc; |
| return 2; |
| } |
| else |
| return RET_TOOSMALL; |
| } |
| else if (wc < 0x110000) |
| { |
| if (n >= 4) |
| { |
| ucs4_t wc1 = 0xd800 + ((wc - 0x10000) >> 10); |
| ucs4_t wc2 = 0xdc00 + ((wc - 0x10000) & 0x3ff); |
| r[0] = (unsigned char) (wc1 >> 8); |
| r[1] = (unsigned char) wc1; |
| r[2] = (unsigned char) (wc2 >> 8); |
| r[3] = (unsigned char) wc2; |
| return 4; |
| } |
| else |
| return RET_TOOSMALL; |
| } |
| } |
| return RET_ILUNI; |
| } |
| |
| /* |
| * UTF-16LE |
| */ |
| |
| /* Specification: RFC 2781 */ |
| |
| static int |
| utf16le_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n) |
| { |
| if (n >= 2) |
| { |
| ucs4_t wc = s[0] + (s[1] << 8); |
| if (wc >= 0xd800 && wc < 0xdc00) |
| { |
| if (n >= 4) |
| { |
| ucs4_t wc2 = s[2] + (s[3] << 8); |
| if (!(wc2 >= 0xdc00 && wc2 < 0xe000)) |
| return RET_ILSEQ; |
| *pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00); |
| return 4; |
| } |
| } |
| else if (wc >= 0xdc00 && wc < 0xe000) |
| { |
| return RET_ILSEQ; |
| } |
| else |
| { |
| *pwc = wc; |
| return 2; |
| } |
| } |
| return RET_TOOFEW; |
| } |
| |
| static int |
| utf16le_wctomb (unsigned char *r, ucs4_t wc, size_t n) |
| { |
| if (!(wc >= 0xd800 && wc < 0xe000)) |
| { |
| if (wc < 0x10000) |
| { |
| if (n >= 2) |
| { |
| r[0] = (unsigned char) wc; |
| r[1] = (unsigned char) (wc >> 8); |
| return 2; |
| } |
| else |
| return RET_TOOSMALL; |
| } |
| else if (wc < 0x110000) |
| { |
| if (n >= 4) |
| { |
| ucs4_t wc1 = 0xd800 + ((wc - 0x10000) >> 10); |
| ucs4_t wc2 = 0xdc00 + ((wc - 0x10000) & 0x3ff); |
| r[0] = (unsigned char) wc1; |
| r[1] = (unsigned char) (wc1 >> 8); |
| r[2] = (unsigned char) wc2; |
| r[3] = (unsigned char) (wc2 >> 8); |
| return 4; |
| } |
| else |
| return RET_TOOSMALL; |
| } |
| } |
| return RET_ILUNI; |
| } |
| |
| /* |
| * UTF-32BE |
| */ |
| |
| /* Specification: Unicode 3.1 Standard Annex #19 */ |
| |
| static int |
| utf32be_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n) |
| { |
| if (n >= 4) |
| { |
| ucs4_t wc = (s[0] << 24) + (s[1] << 16) + (s[2] << 8) + s[3]; |
| if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) |
| { |
| *pwc = wc; |
| return 4; |
| } |
| else |
| return RET_ILSEQ; |
| } |
| return RET_TOOFEW; |
| } |
| |
| static int |
| utf32be_wctomb (unsigned char *r, ucs4_t wc, size_t n) |
| { |
| if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) |
| { |
| if (n >= 4) |
| { |
| r[0] = 0; |
| r[1] = (unsigned char) (wc >> 16); |
| r[2] = (unsigned char) (wc >> 8); |
| r[3] = (unsigned char) wc; |
| return 4; |
| } |
| else |
| return RET_TOOSMALL; |
| } |
| return RET_ILUNI; |
| } |
| |
| /* |
| * UTF-32LE |
| */ |
| |
| /* Specification: Unicode 3.1 Standard Annex #19 */ |
| |
| static int |
| utf32le_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n) |
| { |
| if (n >= 4) |
| { |
| ucs4_t wc = s[0] + (s[1] << 8) + (s[2] << 16) + (s[3] << 24); |
| if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) |
| { |
| *pwc = wc; |
| return 4; |
| } |
| else |
| return RET_ILSEQ; |
| } |
| return RET_TOOFEW; |
| } |
| |
| static int |
| utf32le_wctomb (unsigned char *r, ucs4_t wc, size_t n) |
| { |
| if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) |
| { |
| if (n >= 4) |
| { |
| r[0] = (unsigned char) wc; |
| r[1] = (unsigned char) (wc >> 8); |
| r[2] = (unsigned char) (wc >> 16); |
| r[3] = 0; |
| return 4; |
| } |
| else |
| return RET_TOOSMALL; |
| } |
| return RET_ILUNI; |
| } |
| |
| #endif |
| |
| size_t |
| rpl_iconv (iconv_t cd, |
| ICONV_CONST char **inbuf, size_t *inbytesleft, |
| char **outbuf, size_t *outbytesleft) |
| #undef iconv |
| { |
| #if REPLACE_ICONV_UTF |
| switch ((uintptr_t) cd) |
| { |
| { |
| int (*xxx_wctomb) (unsigned char *, ucs4_t, size_t); |
| |
| case (uintptr_t) _ICONV_UTF8_UTF16BE: |
| xxx_wctomb = utf16be_wctomb; |
| goto loop_from_utf8; |
| case (uintptr_t) _ICONV_UTF8_UTF16LE: |
| xxx_wctomb = utf16le_wctomb; |
| goto loop_from_utf8; |
| case (uintptr_t) _ICONV_UTF8_UTF32BE: |
| xxx_wctomb = utf32be_wctomb; |
| goto loop_from_utf8; |
| case (uintptr_t) _ICONV_UTF8_UTF32LE: |
| xxx_wctomb = utf32le_wctomb; |
| goto loop_from_utf8; |
| |
| loop_from_utf8: |
| if (inbuf == NULL || *inbuf == NULL) |
| return 0; |
| { |
| ICONV_CONST char *inptr = *inbuf; |
| size_t inleft = *inbytesleft; |
| char *outptr = *outbuf; |
| size_t outleft = *outbytesleft; |
| size_t res = 0; |
| while (inleft > 0) |
| { |
| ucs4_t uc; |
| int m = u8_mbtoucr (&uc, (const uint8_t *) inptr, inleft); |
| if (m <= 0) |
| { |
| if (m == -1) |
| { |
| errno = EILSEQ; |
| res = (size_t)(-1); |
| break; |
| } |
| if (m == -2) |
| { |
| errno = EINVAL; |
| res = (size_t)(-1); |
| break; |
| } |
| abort (); |
| } |
| else |
| { |
| int n = xxx_wctomb ((uint8_t *) outptr, uc, outleft); |
| if (n < 0) |
| { |
| if (n == RET_ILUNI) |
| { |
| errno = EILSEQ; |
| res = (size_t)(-1); |
| break; |
| } |
| if (n == RET_TOOSMALL) |
| { |
| errno = E2BIG; |
| res = (size_t)(-1); |
| break; |
| } |
| abort (); |
| } |
| else |
| { |
| inptr += m; |
| inleft -= m; |
| outptr += n; |
| outleft -= n; |
| } |
| } |
| } |
| *inbuf = inptr; |
| *inbytesleft = inleft; |
| *outbuf = outptr; |
| *outbytesleft = outleft; |
| return res; |
| } |
| } |
| |
| { |
| int (*xxx_mbtowc) (ucs4_t *, const unsigned char *, size_t); |
| |
| case (uintptr_t) _ICONV_UTF16BE_UTF8: |
| xxx_mbtowc = utf16be_mbtowc; |
| goto loop_to_utf8; |
| case (uintptr_t) _ICONV_UTF16LE_UTF8: |
| xxx_mbtowc = utf16le_mbtowc; |
| goto loop_to_utf8; |
| case (uintptr_t) _ICONV_UTF32BE_UTF8: |
| xxx_mbtowc = utf32be_mbtowc; |
| goto loop_to_utf8; |
| case (uintptr_t) _ICONV_UTF32LE_UTF8: |
| xxx_mbtowc = utf32le_mbtowc; |
| goto loop_to_utf8; |
| |
| loop_to_utf8: |
| if (inbuf == NULL || *inbuf == NULL) |
| return 0; |
| { |
| ICONV_CONST char *inptr = *inbuf; |
| size_t inleft = *inbytesleft; |
| char *outptr = *outbuf; |
| size_t outleft = *outbytesleft; |
| size_t res = 0; |
| while (inleft > 0) |
| { |
| ucs4_t uc; |
| int m = xxx_mbtowc (&uc, (const uint8_t *) inptr, inleft); |
| if (m <= 0) |
| { |
| if (m == RET_ILSEQ) |
| { |
| errno = EILSEQ; |
| res = (size_t)(-1); |
| break; |
| } |
| if (m == RET_TOOFEW) |
| { |
| errno = EINVAL; |
| res = (size_t)(-1); |
| break; |
| } |
| abort (); |
| } |
| else |
| { |
| int n = u8_uctomb ((uint8_t *) outptr, uc, outleft); |
| if (n < 0) |
| { |
| if (n == -1) |
| { |
| errno = EILSEQ; |
| res = (size_t)(-1); |
| break; |
| } |
| if (n == -2) |
| { |
| errno = E2BIG; |
| res = (size_t)(-1); |
| break; |
| } |
| abort (); |
| } |
| else |
| { |
| inptr += m; |
| inleft -= m; |
| outptr += n; |
| outleft -= n; |
| } |
| } |
| } |
| *inbuf = inptr; |
| *inbytesleft = inleft; |
| *outbuf = outptr; |
| *outbytesleft = outleft; |
| return res; |
| } |
| } |
| } |
| #endif |
| return iconv (cd, inbuf, inbytesleft, outbuf, outbytesleft); |
| } |
