src/iconv_encode_wchar.c

   1 /* This file is part of the YAZ toolkit.
   2  * Copyright (C) 1995-2010 Index Data
   3  * See the file LICENSE for details.
   4  */
   5 /**
   6  * \file
   7  * \brief WCHAR_T iconv encoding / decoding
   8  */
   9
  10 #if HAVE_CONFIG_H
  11 #include <config.h>
  12 #endif
  13
  14 #include <assert.h>
  15 #include <errno.h>
  16 #include <string.h>
  17 #include <ctype.h>
  18 #if HAVE_WCHAR_H
  19 #include <wchar.h>
  20 #endif
  21
  22 #include <yaz/xmalloc.h>
  23 #include "iconv-p.h"
  24
  25 struct encoder_data
  26 {
  27     unsigned long compose_char;
  28 };
  29
  30 #if HAVE_WCHAR_H
  31 static size_t write_wchar_t(yaz_iconv_t cd, yaz_iconv_encoder_t en,
  32                             unsigned long x,
  33                             char **outbuf, size_t *outbytesleft)
  34 {
  35     unsigned char *outp = (unsigned char *) *outbuf;
  36
  37     if (*outbytesleft >= sizeof(wchar_t))
  38     {
  39         wchar_t wch = x;
  40         memcpy(outp, &wch, sizeof(wch));
  41         outp += sizeof(wch);
  42         (*outbytesleft) -= sizeof(wch);
  43     }
  44     else
  45     {
  46         yaz_iconv_set_errno(cd, YAZ_ICONV_E2BIG);
  47         return (size_t)(-1);
  48     }
  49     *outbuf = (char *) outp;
  50     return 0;
  51 }
  52 #endif
  53
  54 yaz_iconv_encoder_t yaz_wchar_encoder(const char *tocode,
  55                                       yaz_iconv_encoder_t e)
  56
  57 {
  58 #if HAVE_WCHAR_H
  59     if (!yaz_matchstr(tocode, "wchar_t"))
  60     {
  61         e->write_handle = write_wchar_t;
  62         return e;
  63     }
  64 #endif
  65     return 0;
  66 }
  67
  68 #if HAVE_WCHAR_H
  69 static unsigned long read_wchar_t(yaz_iconv_t cd, yaz_iconv_decoder_t d,
  70                                   unsigned char *inp,
  71                                   size_t inbytesleft, size_t *no_read)
  72 {
  73     unsigned long x = 0;
  74
  75     if (inbytesleft < sizeof(wchar_t))
  76     {
  77         yaz_iconv_set_errno(cd, YAZ_ICONV_EINVAL); /* incomplete input */
  78         *no_read = 0;
  79     }
  80     else
  81     {
  82         wchar_t wch;
  83         memcpy(&wch, inp, sizeof(wch));
  84         x = wch;
  85         *no_read = sizeof(wch);
  86     }
  87     return x;
  88 }
  89 #endif
  90
  91 yaz_iconv_decoder_t yaz_wchar_decoder(const char *fromcode,
  92                                       yaz_iconv_decoder_t d)
  93
  94 {
  95 #if HAVE_WCHAR_H
  96     if (!yaz_matchstr(fromcode, "wchar_t"))
  97     {
  98         d->read_handle = read_wchar_t;
  99         return d;
 100     }
 101 #endif
 102     return 0;
 103 }
 104
 105
 106 /*
 107  * Local variables:
 108  * c-basic-offset: 4
 109  * c-file-style: "Stroustrup"
 110  * indent-tabs-mode: nil
 111  * End:
 112  * vim: shiftwidth=4 tabstop=8 expandtab
 113  */
 114