newlib/libc/iconv/ces/us-ascii.c

   1 /*
   2  * Copyright (c) 2003-2004, Artem B. Bityuckiy
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  23  * SUCH DAMAGE.
  24  */
  25 #include "cesbi.h"
  26
  27 #if defined (ICONV_TO_UCS_CES_US_ASCII) \
  28  || defined (ICONV_FROM_UCS_CES_US_ASCII)
  29
  30 #include <_ansi.h>
  31 #include <reent.h>
  32 #include <sys/types.h>
  33 #include "../lib/local.h"
  34 #include "../lib/ucsconv.h"
  35
  36 /*
  37  * For optimization purposes us_ascii is implemented as separate CES converter.
  38  * Another possible way is to add us_ascii CCS and use table-based CES converter.
  39  */
  40
  41 #if defined (ICONV_FROM_UCS_CES_US_ASCII)
  42 static size_t
  43 us_ascii_convert_from_ucs (void *data,
  44                                   ucs4_t in,
  45                                   unsigned char **outbuf,
  46                                   size_t *outbytesleft)
  47 {
  48   if (in  > 0x7F)
  49     return (size_t)ICONV_CES_INVALID_CHARACTER;
  50
  51   *((char *)(*outbuf)) = (char)in;
  52
  53   *outbuf += 1;
  54   *outbytesleft -= 1;
  55
  56   return 1;
  57 }
  58 #endif /* ICONV_FROM_UCS_CES_US_ASCII */
  59
  60 #if defined (ICONV_TO_UCS_CES_US_ASCII)
  61 static ucs4_t
  62 us_ascii_convert_to_ucs (void *data,
  63                                 const unsigned char **inbuf,
  64                                 size_t *inbytesleft)
  65 {
  66   ucs4_t res;
  67
  68   if (*inbytesleft < 1)
  69     return (ucs4_t)ICONV_CES_BAD_SEQUENCE;
  70
  71   res = (ucs4_t)**inbuf;
  72
  73   if (res  > 0x7F)
  74     return (ucs4_t)ICONV_CES_INVALID_CHARACTER;
  75
  76   *inbytesleft -= 1;
  77   *inbuf += 1;
  78
  79   return res;
  80 }
  81 #endif /* ICONV_TO_UCS_CES_US_ASCII */
  82
  83 static int
  84 us_ascii_get_mb_cur_max (void *data)
  85 {
  86   return 2;
  87 }
  88
  89 #if defined (ICONV_TO_UCS_CES_US_ASCII)
  90 const iconv_to_ucs_ces_handlers_t
  91 _iconv_to_ucs_ces_handlers_us_ascii =
  92 {
  93   NULL,
  94   NULL,
  95   us_ascii_get_mb_cur_max,
  96   NULL,
  97   NULL,
  98   NULL,
  99   us_ascii_convert_to_ucs
 100 };
 101 #endif
 102
 103 #if defined (ICONV_FROM_UCS_CES_US_ASCII)
 104 const iconv_from_ucs_ces_handlers_t
 105 _iconv_from_ucs_ces_handlers_us_ascii =
 106 {
 107   NULL,
 108   NULL,
 109   us_ascii_get_mb_cur_max,
 110   NULL,
 111   NULL,
 112   NULL,
 113   us_ascii_convert_from_ucs
 114 };
 115 #endif
 116
 117 #endif /* ICONV_TO_UCS_CES_US_ASCII || ICONV_FROM_UCS_CES_US_ASCII */
 118