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Annotation of embedaddon/libiconv/lib/ucs2swapped.h, revision 1.1.1.1

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: }