diff options
Diffstat (limited to 'MSVC/iconv/utf8.h')
| -rw-r--r-- | MSVC/iconv/utf8.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/MSVC/iconv/utf8.h b/MSVC/iconv/utf8.h new file mode 100644 index 0000000..9a827f3 --- /dev/null +++ b/MSVC/iconv/utf8.h @@ -0,0 +1,128 @@ +/* + * Copyright (C) 1999-2001 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, write to the Free Software Foundation, Inc., 59 Temple Place - + * Suite 330, Boston, MA 02111-1307, USA. + */ + +/* + * UTF-8 + */ + +/* Specification: RFC 2279 */ + +static int +utf8_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n) +{ + unsigned char c = s[0]; + + if (c < 0x80) { + *pwc = c; + return 1; + } else if (c < 0xc2) { + return RET_ILSEQ; + } else if (c < 0xe0) { + if (n < 2) + return RET_TOOFEW(0); + if (!((s[1] ^ 0x80) < 0x40)) + return RET_ILSEQ; + *pwc = ((ucs4_t) (c & 0x1f) << 6) + | (ucs4_t) (s[1] ^ 0x80); + return 2; + } else if (c < 0xf0) { + if (n < 3) + return RET_TOOFEW(0); + if (!((s[1] ^ 0x80) < 0x40 && (s[2] ^ 0x80) < 0x40 + && (c >= 0xe1 || s[1] >= 0xa0))) + return RET_ILSEQ; + *pwc = ((ucs4_t) (c & 0x0f) << 12) + | ((ucs4_t) (s[1] ^ 0x80) << 6) + | (ucs4_t) (s[2] ^ 0x80); + return 3; + } else if (c < 0xf8 && sizeof(ucs4_t)*8 >= 32) { + if (n < 4) + return RET_TOOFEW(0); + if (!((s[1] ^ 0x80) < 0x40 && (s[2] ^ 0x80) < 0x40 + && (s[3] ^ 0x80) < 0x40 + && (c >= 0xf1 || s[1] >= 0x90))) + return RET_ILSEQ; + *pwc = ((ucs4_t) (c & 0x07) << 18) + | ((ucs4_t) (s[1] ^ 0x80) << 12) + | ((ucs4_t) (s[2] ^ 0x80) << 6) + | (ucs4_t) (s[3] ^ 0x80); + return 4; + } else if (c < 0xfc && sizeof(ucs4_t)*8 >= 32) { + if (n < 5) + return RET_TOOFEW(0); + if (!((s[1] ^ 0x80) < 0x40 && (s[2] ^ 0x80) < 0x40 + && (s[3] ^ 0x80) < 0x40 && (s[4] ^ 0x80) < 0x40 + && (c >= 0xf9 || s[1] >= 0x88))) + return RET_ILSEQ; + *pwc = ((ucs4_t) (c & 0x03) << 24) + | ((ucs4_t) (s[1] ^ 0x80) << 18) + | ((ucs4_t) (s[2] ^ 0x80) << 12) + | ((ucs4_t) (s[3] ^ 0x80) << 6) + | (ucs4_t) (s[4] ^ 0x80); + return 5; + } else if (c < 0xfe && sizeof(ucs4_t)*8 >= 32) { + if (n < 6) + return RET_TOOFEW(0); + if (!((s[1] ^ 0x80) < 0x40 && (s[2] ^ 0x80) < 0x40 + && (s[3] ^ 0x80) < 0x40 && (s[4] ^ 0x80) < 0x40 + && (s[5] ^ 0x80) < 0x40 + && (c >= 0xfd || s[1] >= 0x84))) + return RET_ILSEQ; + *pwc = ((ucs4_t) (c & 0x01) << 30) + | ((ucs4_t) (s[1] ^ 0x80) << 24) + | ((ucs4_t) (s[2] ^ 0x80) << 18) + | ((ucs4_t) (s[3] ^ 0x80) << 12) + | ((ucs4_t) (s[4] ^ 0x80) << 6) + | (ucs4_t) (s[5] ^ 0x80); + return 6; + } else + return RET_ILSEQ; +} + +static int +utf8_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n) /* n == 0 is acceptable */ +{ + int count; + if (wc < 0x80) + count = 1; + else if (wc < 0x800) + count = 2; + else if (wc < 0x10000) + count = 3; + else if (wc < 0x200000) + count = 4; + else if (wc < 0x4000000) + count = 5; + else if (wc <= 0x7fffffff) + count = 6; + else + return RET_ILUNI; + if (n < count) + return RET_TOOSMALL; + switch (count) { /* note: code falls through cases! */ + case 6: r[5] = 0x80 | (wc & 0x3f); wc = wc >> 6; wc |= 0x4000000; + case 5: r[4] = 0x80 | (wc & 0x3f); wc = wc >> 6; wc |= 0x200000; + case 4: r[3] = 0x80 | (wc & 0x3f); wc = wc >> 6; wc |= 0x10000; + case 3: r[2] = 0x80 | (wc & 0x3f); wc = wc >> 6; wc |= 0x800; + case 2: r[1] = 0x80 | (wc & 0x3f); wc = wc >> 6; wc |= 0xc0; + case 1: r[0] = wc; + } + return count; +} |