1 /* 2 * Copyright (C) 1999-2001 Free Software Foundation, Inc. 3 * This file is part of the GNU LIBICONV Library. 4 * 5 * The GNU LIBICONV Library is free software; you can redistribute it 6 * and/or modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either version 2 8 * of the License, or (at your option) any later version. 9 * 10 * The GNU LIBICONV Library is distributed in the hope that it will be 11 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public 16 * License along with the GNU LIBICONV Library; see the file COPYING.LIB. 17 * If not, write to the Free Software Foundation, Inc., 51 Franklin Street, 18 * Fifth Floor, Boston, MA 02110-1301, USA. 19 */ 20 21 /* 22 * UTF-32BE 23 */ 24 25 /* Specification: Unicode 3.1 Standard Annex #19 */ 26 27 static int 28 utf32be_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n) 29 { 30 if (n >= 4) { 31 ucs4_t wc = (s[0] << 24) + (s[1] << 16) + (s[2] << 8) + s[3]; 32 if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) { 33 *pwc = wc; 34 return 4; 35 } else 36 return RET_ILSEQ; 37 } 38 return RET_TOOFEW(0); 39 } 40 41 static int 42 utf32be_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n) 43 { 44 if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) { 45 if (n >= 4) { 46 r[0] = 0; 47 r[1] = (unsigned char) (wc >> 16); 48 r[2] = (unsigned char) (wc >> 8); 49 r[3] = (unsigned char) wc; 50 return 4; 51 } else 52 return RET_TOOSMALL; 53 } 54 return RET_ILUNI; 55 } 56