1*50c77c6eSEd Schouten /*- 2*50c77c6eSEd Schouten * Copyright (c) 2013 Ed Schouten <ed@FreeBSD.org> 3*50c77c6eSEd Schouten * All rights reserved. 4*50c77c6eSEd Schouten * 5*50c77c6eSEd Schouten * Redistribution and use in source and binary forms, with or without 6*50c77c6eSEd Schouten * modification, are permitted provided that the following conditions 7*50c77c6eSEd Schouten * are met: 8*50c77c6eSEd Schouten * 1. Redistributions of source code must retain the above copyright 9*50c77c6eSEd Schouten * notice, this list of conditions and the following disclaimer. 10*50c77c6eSEd Schouten * 2. Redistributions in binary form must reproduce the above copyright 11*50c77c6eSEd Schouten * notice, this list of conditions and the following disclaimer in the 12*50c77c6eSEd Schouten * documentation and/or other materials provided with the distribution. 13*50c77c6eSEd Schouten * 14*50c77c6eSEd Schouten * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15*50c77c6eSEd Schouten * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16*50c77c6eSEd Schouten * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17*50c77c6eSEd Schouten * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18*50c77c6eSEd Schouten * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19*50c77c6eSEd Schouten * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20*50c77c6eSEd Schouten * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21*50c77c6eSEd Schouten * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22*50c77c6eSEd Schouten * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23*50c77c6eSEd Schouten * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24*50c77c6eSEd Schouten * SUCH DAMAGE. 25*50c77c6eSEd Schouten */ 26*50c77c6eSEd Schouten 27*50c77c6eSEd Schouten #include <sys/cdefs.h> 28*50c77c6eSEd Schouten __FBSDID("$FreeBSD$"); 29*50c77c6eSEd Schouten 30*50c77c6eSEd Schouten #include <errno.h> 31*50c77c6eSEd Schouten #include <uchar.h> 32*50c77c6eSEd Schouten #include "xlocale_private.h" 33*50c77c6eSEd Schouten 34*50c77c6eSEd Schouten typedef struct { 35*50c77c6eSEd Schouten char16_t lead_surrogate; 36*50c77c6eSEd Schouten mbstate_t c32_mbstate; 37*50c77c6eSEd Schouten } _Char16State; 38*50c77c6eSEd Schouten 39*50c77c6eSEd Schouten size_t 40*50c77c6eSEd Schouten c16rtomb_l(char * __restrict s, char16_t c16, mbstate_t * __restrict ps, 41*50c77c6eSEd Schouten locale_t locale) 42*50c77c6eSEd Schouten { 43*50c77c6eSEd Schouten _Char16State *cs; 44*50c77c6eSEd Schouten char32_t c32; 45*50c77c6eSEd Schouten 46*50c77c6eSEd Schouten FIX_LOCALE(locale); 47*50c77c6eSEd Schouten if (ps == NULL) 48*50c77c6eSEd Schouten ps = &locale->c16rtomb; 49*50c77c6eSEd Schouten cs = (_Char16State *)ps; 50*50c77c6eSEd Schouten 51*50c77c6eSEd Schouten /* If s is a null pointer, the value of parameter c16 is ignored. */ 52*50c77c6eSEd Schouten if (s == NULL) { 53*50c77c6eSEd Schouten c32 = 0; 54*50c77c6eSEd Schouten } else if (cs->lead_surrogate >= 0xd800 && 55*50c77c6eSEd Schouten cs->lead_surrogate <= 0xdbff) { 56*50c77c6eSEd Schouten /* We should see a trail surrogate now. */ 57*50c77c6eSEd Schouten if (c16 < 0xdc00 || c16 > 0xdfff) { 58*50c77c6eSEd Schouten errno = EILSEQ; 59*50c77c6eSEd Schouten return ((size_t)-1); 60*50c77c6eSEd Schouten } 61*50c77c6eSEd Schouten c32 = 0x10000 + ((cs->lead_surrogate & 0x3ff) << 10 | 62*50c77c6eSEd Schouten (c16 & 0x3ff)); 63*50c77c6eSEd Schouten } else if (c16 >= 0xd800 && c16 <= 0xdbff) { 64*50c77c6eSEd Schouten /* Store lead surrogate for next invocation. */ 65*50c77c6eSEd Schouten cs->lead_surrogate = c16; 66*50c77c6eSEd Schouten return (0); 67*50c77c6eSEd Schouten } else { 68*50c77c6eSEd Schouten /* Regular character. */ 69*50c77c6eSEd Schouten c32 = c16; 70*50c77c6eSEd Schouten } 71*50c77c6eSEd Schouten cs->lead_surrogate = 0; 72*50c77c6eSEd Schouten 73*50c77c6eSEd Schouten return (c32rtomb_l(s, c32, &cs->c32_mbstate, locale)); 74*50c77c6eSEd Schouten } 75*50c77c6eSEd Schouten 76*50c77c6eSEd Schouten size_t 77*50c77c6eSEd Schouten c16rtomb(char * __restrict s, char16_t c16, mbstate_t * __restrict ps) 78*50c77c6eSEd Schouten { 79*50c77c6eSEd Schouten 80*50c77c6eSEd Schouten return (c16rtomb_l(s, c16, ps, __get_locale())); 81*50c77c6eSEd Schouten } 82