The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * Copyright (c) 2000-2001 Boris Popov
    3  * 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 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/11.0/sys/libkern/iconv_xlat.c 206361 2010-04-07 16:50:38Z joel $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/kernel.h>
   32 #include <sys/systm.h>
   33 #include <sys/malloc.h>
   34 #include <sys/iconv.h>
   35 
   36 #include "iconv_converter_if.h"
   37 
   38 /*
   39  * "XLAT" converter
   40  */
   41 
   42 #ifdef MODULE_DEPEND
   43 MODULE_DEPEND(iconv_xlat, libiconv, 2, 2, 2);
   44 #endif
   45 
   46 /*
   47  * XLAT converter instance
   48  */
   49 struct iconv_xlat {
   50         KOBJ_FIELDS;
   51         u_char *                d_table;
   52         struct iconv_cspair *   d_csp;
   53 };
   54 
   55 static int
   56 iconv_xlat_open(struct iconv_converter_class *dcp,
   57         struct iconv_cspair *csp, struct iconv_cspair *cspf, void **dpp)
   58 {
   59         struct iconv_xlat *dp;
   60 
   61         dp = (struct iconv_xlat *)kobj_create((struct kobj_class*)dcp, M_ICONV, M_WAITOK);
   62         dp->d_table = csp->cp_data;
   63         dp->d_csp = csp;
   64         csp->cp_refcount++;
   65         *dpp = (void*)dp;
   66         return 0;
   67 }
   68 
   69 static int
   70 iconv_xlat_close(void *data)
   71 {
   72         struct iconv_xlat *dp = data;
   73 
   74         dp->d_csp->cp_refcount--;
   75         kobj_delete((struct kobj*)data, M_ICONV);
   76         return 0;
   77 }
   78 
   79 static int
   80 iconv_xlat_conv(void *d2p, const char **inbuf,
   81         size_t *inbytesleft, char **outbuf, size_t *outbytesleft,
   82         int convchar, int casetype)
   83 {
   84         struct iconv_xlat *dp = (struct iconv_xlat*)d2p;
   85         const char *src;
   86         char *dst;
   87         int n, r;
   88 
   89         if (inbuf == NULL || *inbuf == NULL || outbuf == NULL || *outbuf == NULL)
   90                 return 0;
   91         if (casetype != 0)
   92                 return -1;
   93         if (convchar == 1)
   94                 r = n = 1;
   95         else
   96                 r = n = min(*inbytesleft, *outbytesleft);
   97         src = *inbuf;
   98         dst = *outbuf;
   99         while(r--)
  100                 *dst++ = dp->d_table[(u_char)*src++];
  101         *inbuf += n;
  102         *outbuf += n;
  103         *inbytesleft -= n;
  104         *outbytesleft -= n;
  105         return 0;
  106 }
  107 
  108 static const char *
  109 iconv_xlat_name(struct iconv_converter_class *dcp)
  110 {
  111         return "xlat";
  112 }
  113 
  114 static kobj_method_t iconv_xlat_methods[] = {
  115         KOBJMETHOD(iconv_converter_open,        iconv_xlat_open),
  116         KOBJMETHOD(iconv_converter_close,       iconv_xlat_close),
  117         KOBJMETHOD(iconv_converter_conv,        iconv_xlat_conv),
  118 #if 0
  119         KOBJMETHOD(iconv_converter_init,        iconv_xlat_init),
  120         KOBJMETHOD(iconv_converter_done,        iconv_xlat_done),
  121 #endif
  122         KOBJMETHOD(iconv_converter_name,        iconv_xlat_name),
  123         {0, 0}
  124 };
  125 
  126 KICONV_CONVERTER(xlat, sizeof(struct iconv_xlat));

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