/* * 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., 51 Franklin Street, * Fifth Floor, Boston, MA 02110-1301, USA. */ /* * UTF-16LE */ /* Specification: RFC 2781 */ static int utf16le_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n) { int count = 0; 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 count+4; } } else if (wc >= 0xdc00 && wc < 0xe000) { return RET_ILSEQ; } else { *pwc = wc; return count+2; } } return RET_TOOFEW(count); } static int utf16le_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int 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; }