iconv_xlat.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2000-2001 Boris Popov
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 #include <sys/param.h>
   33 #include <sys/kernel.h>
   34 #include <sys/systm.h>
   35 #include <sys/malloc.h>
   36 #include <sys/iconv.h>
   37 
   38 #include "iconv_converter_if.h"
   39 
   40 /*
   41  * "XLAT" converter
   42  */
   43 
   44 #ifdef MODULE_DEPEND
   45 MODULE_DEPEND(iconv_xlat, libiconv, 2, 2, 2);
   46 #endif
   47 
   48 /*
   49  * XLAT converter instance
   50  */
   51 struct iconv_xlat {
   52         KOBJ_FIELDS;
   53         u_char *                d_table;
   54         struct iconv_cspair *   d_csp;
   55 };
   56 
   57 static int
   58 iconv_xlat_open(struct iconv_converter_class *dcp,
   59         struct iconv_cspair *csp, struct iconv_cspair *cspf, void **dpp)
   60 {
   61         struct iconv_xlat *dp;
   62 
   63         dp = (struct iconv_xlat *)kobj_create((struct kobj_class*)dcp, M_ICONV, M_WAITOK);
   64         dp->d_table = csp->cp_data;
   65         dp->d_csp = csp;
   66         csp->cp_refcount++;
   67         *dpp = (void*)dp;
   68         return 0;
   69 }
   70 
   71 static int
   72 iconv_xlat_close(void *data)
   73 {
   74         struct iconv_xlat *dp = data;
   75 
   76         dp->d_csp->cp_refcount--;
   77         kobj_delete((struct kobj*)data, M_ICONV);
   78         return 0;
   79 }
   80 
   81 static int
   82 iconv_xlat_conv(void *d2p, const char **inbuf,
   83         size_t *inbytesleft, char **outbuf, size_t *outbytesleft,
   84         int convchar, int casetype)
   85 {
   86         struct iconv_xlat *dp = (struct iconv_xlat*)d2p;
   87         const char *src;
   88         char *dst;
   89         int n, r;
   90 
   91         if (inbuf == NULL || *inbuf == NULL || outbuf == NULL || *outbuf == NULL)
   92                 return 0;
   93         if (casetype != 0)
   94                 return -1;
   95         if (convchar == 1)
   96                 r = n = 1;
   97         else
   98                 r = n = min(*inbytesleft, *outbytesleft);
   99         src = *inbuf;
  100         dst = *outbuf;
  101         while(r--)
  102                 *dst++ = dp->d_table[(u_char)*src++];
  103         *inbuf += n;
  104         *outbuf += n;
  105         *inbytesleft -= n;
  106         *outbytesleft -= n;
  107         return 0;
  108 }
  109 
  110 static const char *
  111 iconv_xlat_name(struct iconv_converter_class *dcp)
  112 {
  113         return "xlat";
  114 }
  115 
  116 static kobj_method_t iconv_xlat_methods[] = {
  117         KOBJMETHOD(iconv_converter_open,        iconv_xlat_open),
  118         KOBJMETHOD(iconv_converter_close,       iconv_xlat_close),
  119         KOBJMETHOD(iconv_converter_conv,        iconv_xlat_conv),
  120 #if 0
  121         KOBJMETHOD(iconv_converter_init,        iconv_xlat_init),
  122         KOBJMETHOD(iconv_converter_done,        iconv_xlat_done),
  123 #endif
  124         KOBJMETHOD(iconv_converter_name,        iconv_xlat_name),
  125         {0, 0}
  126 };
  127 
  128 KICONV_CONVERTER(xlat, sizeof(struct iconv_xlat));

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FreeBSD/Linux Kernel Cross Reference sys/libkern/iconv_xlat.c

FreeBSD/Linux Kernel Cross Reference
sys/libkern/iconv_xlat.c