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  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *    This product includes software developed by Boris Popov.
   16  * 4. Neither the name of the author nor the names of any co-contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  * $FreeBSD: releng/5.1/sys/libkern/iconv_xlat.c 111119 2003-02-19 05:47:46Z imp $
   33  */
   34 #include <sys/param.h>
   35 #include <sys/kernel.h>
   36 #include <sys/systm.h>
   37 #include <sys/malloc.h>
   38 #include <sys/iconv.h>
   39 
   40 #include "iconv_converter_if.h"
   41 
   42 /*
   43  * "XLAT" converter
   44  */
   45 
   46 #ifdef MODULE_DEPEND
   47 MODULE_DEPEND(iconv_xlat, libiconv, 1, 1, 1);
   48 #endif
   49 
   50 /*
   51  * XLAT converter instance
   52  */
   53 struct iconv_xlat {
   54         KOBJ_FIELDS;
   55         u_char *                d_table;
   56         struct iconv_cspair *   d_csp;
   57 };
   58 
   59 static int
   60 iconv_xlat_open(struct iconv_converter_class *dcp,
   61         struct iconv_cspair *csp, struct iconv_cspair *cspf, void **dpp)
   62 {
   63         struct iconv_xlat *dp;
   64 
   65         dp = (struct iconv_xlat *)kobj_create((struct kobj_class*)dcp, M_ICONV, M_WAITOK);
   66         dp->d_table = csp->cp_data;
   67         dp->d_csp = csp;
   68         csp->cp_refcount++;
   69         *dpp = (void*)dp;
   70         return 0;
   71 }
   72 
   73 static int
   74 iconv_xlat_close(void *data)
   75 {
   76         struct iconv_xlat *dp = data;
   77 
   78         dp->d_csp->cp_refcount--;
   79         kobj_delete((struct kobj*)data, M_ICONV);
   80         return 0;
   81 }
   82 
   83 static int
   84 iconv_xlat_conv(void *d2p, const char **inbuf,
   85         size_t *inbytesleft, char **outbuf, size_t *outbytesleft)
   86 {
   87         struct iconv_xlat *dp = (struct iconv_xlat*)d2p;
   88         const char *src;
   89         char *dst;
   90         int n, r;
   91 
   92         if (inbuf == NULL || *inbuf == NULL || outbuf == NULL || *outbuf == NULL)
   93                 return 0;
   94         r = n = min(*inbytesleft, *outbytesleft);
   95         src = *inbuf;
   96         dst = *outbuf;
   97         while(r--)
   98                 *dst++ = dp->d_table[(u_char)*src++];
   99         *inbuf += n;
  100         *outbuf += n;
  101         *inbytesleft += n;
  102         *outbytesleft -= n;
  103         return 0;
  104 }
  105 
  106 static const char *
  107 iconv_xlat_name(struct iconv_converter_class *dcp)
  108 {
  109         return "xlat";
  110 }
  111 
  112 static kobj_method_t iconv_xlat_methods[] = {
  113         KOBJMETHOD(iconv_converter_open,        iconv_xlat_open),
  114         KOBJMETHOD(iconv_converter_close,       iconv_xlat_close),
  115         KOBJMETHOD(iconv_converter_conv,        iconv_xlat_conv),
  116 #if 0
  117         KOBJMETHOD(iconv_converter_init,        iconv_xlat_init),
  118         KOBJMETHOD(iconv_converter_done,        iconv_xlat_done),
  119 #endif
  120         KOBJMETHOD(iconv_converter_name,        iconv_xlat_name),
  121         {0, 0}
  122 };
  123 
  124 KICONV_CONVERTER(xlat, sizeof(struct iconv_xlat));

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