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Annotation of embedaddon/libiconv/lib/ucs2swapped.h, revision 1.1.1.2

1.1       misho       1: /*
1.1.1.2 ! misho       2:  * Copyright (C) 1999-2001, 2016 Free Software Foundation, Inc.
1.1       misho       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.
1.1.1.2 ! misho      17:  * If not, see <https://www.gnu.org/licenses/>.
1.1       misho      18:  */
                     19: 
                     20: /*
                     21:  * UCS-2-SWAPPED = UCS-2-INTERNAL with inverted endianness
                     22:  */
                     23: 
                     24: static int
1.1.1.2 ! misho      25: ucs2swapped_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
1.1       misho      26: {
                     27:   /* This function assumes that 'unsigned short' has exactly 16 bits. */
                     28:   if (sizeof(unsigned short) != 2) abort();
                     29: 
                     30:   if (n >= 2) {
                     31:     unsigned short x = *(const unsigned short *)s;
                     32:     x = (x >> 8) | (x << 8);
                     33:     if (x >= 0xd800 && x < 0xe000) {
                     34:       return RET_ILSEQ;
                     35:     } else {
                     36:       *pwc = x;
                     37:       return 2;
                     38:     }
                     39:   }
                     40:   return RET_TOOFEW(0);
                     41: }
                     42: 
                     43: static int
1.1.1.2 ! misho      44: ucs2swapped_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
1.1       misho      45: {
                     46:   /* This function assumes that 'unsigned short' has exactly 16 bits. */
                     47:   if (sizeof(unsigned short) != 2) abort();
                     48: 
                     49:   if (wc < 0x10000 && !(wc >= 0xd800 && wc < 0xe000)) {
                     50:     if (n >= 2) {
                     51:       unsigned short x = wc;
                     52:       x = (x >> 8) | (x << 8);
                     53:       *(unsigned short *)r = x;
                     54:       return 2;
                     55:     } else
                     56:       return RET_TOOSMALL;
                     57:   } else
                     58:     return RET_ILUNI;
                     59: }