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Annotation of embedaddon/libiconv/lib/ucs2swapped.h, revision 1.1

1.1     ! misho       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:  * UCS-2-SWAPPED = UCS-2-INTERNAL with inverted endianness
        !            23:  */
        !            24: 
        !            25: static int
        !            26: ucs2swapped_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
        !            27: {
        !            28:   /* This function assumes that 'unsigned short' has exactly 16 bits. */
        !            29:   if (sizeof(unsigned short) != 2) abort();
        !            30: 
        !            31:   if (n >= 2) {
        !            32:     unsigned short x = *(const unsigned short *)s;
        !            33:     x = (x >> 8) | (x << 8);
        !            34:     if (x >= 0xd800 && x < 0xe000) {
        !            35:       return RET_ILSEQ;
        !            36:     } else {
        !            37:       *pwc = x;
        !            38:       return 2;
        !            39:     }
        !            40:   }
        !            41:   return RET_TOOFEW(0);
        !            42: }
        !            43: 
        !            44: static int
        !            45: ucs2swapped_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
        !            46: {
        !            47:   /* This function assumes that 'unsigned short' has exactly 16 bits. */
        !            48:   if (sizeof(unsigned short) != 2) abort();
        !            49: 
        !            50:   if (wc < 0x10000 && !(wc >= 0xd800 && wc < 0xe000)) {
        !            51:     if (n >= 2) {
        !            52:       unsigned short x = wc;
        !            53:       x = (x >> 8) | (x << 8);
        !            54:       *(unsigned short *)r = x;
        !            55:       return 2;
        !            56:     } else
        !            57:       return RET_TOOSMALL;
        !            58:   } else
        !            59:     return RET_ILUNI;
        !            60: }