newlib/libc/iconv/ces/ucs-2-internal.c

   1 /*
   2  * Copyright (c) 2003-2004, Artem B. Bityuckiy
   3  * Copyright (c) 1999,2000, Konstantin Chuguev. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26 #include "cesbi.h"
  27
  28 #if defined (ICONV_TO_UCS_CES_UCS_2_INTERNAL) \
  29  || defined (ICONV_FROM_UCS_CES_UCS_2_INTERNAL)
  30
  31 #include <_ansi.h>
  32 #include <reent.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <sys/types.h>
  36 #include "../lib/local.h"
  37 #include "../lib/ucsconv.h"
  38 #include "../lib/endian.h"
  39
  40 /*
  41  * Internal 2-byte representation of UCS-2 codes without restrictions and
  42  * without BOM support.
  43  */
  44
  45 #if defined (ICONV_FROM_UCS_CES_UCS_2_INTERNAL)
  46 static size_t
  47 ucs_2_internal_convert_from_ucs (void *data,
  48                                         register ucs4_t in,
  49                                         unsigned char **outbuf,
  50                                         size_t *outbytesleft)
  51 {
  52   if (in > 0x0000FFFF)
  53     return (size_t)ICONV_CES_INVALID_CHARACTER;
  54
  55   if (*outbytesleft < sizeof (ucs2_t))
  56     return (size_t)ICONV_CES_NOSPACE;
  57
  58   *((ucs2_t *)(*outbuf)) = (ucs2_t)in;
  59   *outbuf += sizeof (ucs2_t);
  60   *outbytesleft -= sizeof (ucs2_t);
  61
  62   return sizeof (ucs2_t);
  63 }
  64 #endif /* ICONV_FROM_UCS_CES_UCS_2_INTERNAL */
  65
  66 #if defined (ICONV_TO_UCS_CES_UCS_2_INTERNAL)
  67 static ucs4_t
  68 ucs_2_internal_convert_to_ucs (void *data,
  69                                       const unsigned char **inbuf,
  70                                       size_t *inbytesleft)
  71 {
  72   register ucs4_t res;
  73
  74   if (*inbytesleft < sizeof (ucs2_t))
  75     return (ucs4_t)ICONV_CES_BAD_SEQUENCE;
  76
  77   res = (ucs4_t)*((ucs2_t *)(*inbuf));
  78
  79   if (res > 0x0000FFFF)
  80     return (ucs4_t)ICONV_CES_INVALID_CHARACTER;
  81
  82   *inbuf += sizeof (ucs2_t);
  83   *inbytesleft -= sizeof (ucs2_t);
  84
  85   return res;
  86 }
  87 #endif /* ICONV_TO_UCS_CES_UCS_2_INTERNAL */
  88
  89 static int
  90 ucs_2_internal_get_mb_cur_max (void *data)
  91 {
  92   return 2;
  93 }
  94
  95 #if defined (ICONV_TO_UCS_CES_UCS_2_INTERNAL)
  96 const iconv_to_ucs_ces_handlers_t
  97 _iconv_to_ucs_ces_handlers_ucs_2_internal =
  98 {
  99   NULL,
 100   NULL,
 101   ucs_2_internal_get_mb_cur_max,
 102   NULL,
 103   NULL,
 104   NULL,
 105   ucs_2_internal_convert_to_ucs
 106 };
 107 #endif
 108
 109 #if defined (ICONV_FROM_UCS_CES_UCS_2_INTERNAL)
 110 const iconv_from_ucs_ces_handlers_t
 111 _iconv_from_ucs_ces_handlers_ucs_2_internal =
 112 {
 113   NULL,
 114   NULL,
 115   ucs_2_internal_get_mb_cur_max,
 116   NULL,
 117   NULL,
 118   NULL,
 119   ucs_2_internal_convert_from_ucs
 120 };
 121 #endif
 122
 123 #endif /* ICONV_TO_UCS_CES_UCS_2_INTERNAL || ICONV_FROM_UCS_CES_UCS_2_INTERNAL */
 124