From 3590c846d4c2febbc05b4ad6b14a06edc549e453 Mon Sep 17 00:00:00 2001 From: "Manuel A. Fernandez Montecelo" Date: Fri, 27 May 2016 14:35:16 +0100 Subject: Imported Upstream version 0.9.6+really0.9.6 --- lib/iconv.c | 449 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 449 insertions(+) create mode 100644 lib/iconv.c (limited to 'lib/iconv.c') diff --git a/lib/iconv.c b/lib/iconv.c new file mode 100644 index 00000000..850c8b77 --- /dev/null +++ b/lib/iconv.c @@ -0,0 +1,449 @@ +/* Character set conversion. + Copyright (C) 1999-2001, 2007, 2009-2015 Free Software Foundation, Inc. + + This program 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, 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 Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License along + with this program; if not, see . */ + +#include + +/* Specification. */ +#include + +#include + +#if REPLACE_ICONV_UTF +# include +# include +# include +# include "unistr.h" +# ifndef uintptr_t +# define uintptr_t unsigned long +# endif +#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); +} -- cgit v1.2.3