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: src/sys/libkern/iconv_xlat.c,v 1.5.30.1 2009/04/15 03:14:26 kensmith Exp $
   33  */
   34 
   35 #include <sys/param.h>
   36 #include <sys/kernel.h>
   37 #include <sys/systm.h>
   38 #include <sys/malloc.h>
   39 #include <sys/iconv.h>
   40 
   41 #include "iconv_converter_if.h"
   42 
   43 /*
   44  * "XLAT" converter
   45  */
   46 
   47 #ifdef MODULE_DEPEND
   48 MODULE_DEPEND(iconv_xlat, libiconv, 2, 2, 2);
   49 #endif
   50 
   51 /*
   52  * XLAT converter instance
   53  */
   54 struct iconv_xlat {
   55         KOBJ_FIELDS;
   56         u_char *                d_table;
   57         struct iconv_cspair *   d_csp;
   58 };
   59 
   60 static int
   61 iconv_xlat_open(struct iconv_converter_class *dcp,
   62         struct iconv_cspair *csp, struct iconv_cspair *cspf, void **dpp)
   63 {
   64         struct iconv_xlat *dp;
   65 
   66         dp = (struct iconv_xlat *)kobj_create((struct kobj_class*)dcp, M_ICONV, M_WAITOK);
   67         dp->d_table = csp->cp_data;
   68         dp->d_csp = csp;
   69         csp->cp_refcount++;
   70         *dpp = (void*)dp;
   71         return 0;
   72 }
   73 
   74 static int
   75 iconv_xlat_close(void *data)
   76 {
   77         struct iconv_xlat *dp = data;
   78 
   79         dp->d_csp->cp_refcount--;
   80         kobj_delete((struct kobj*)data, M_ICONV);
   81         return 0;
   82 }
   83 
   84 static int
   85 iconv_xlat_conv(void *d2p, const char **inbuf,
   86         size_t *inbytesleft, char **outbuf, size_t *outbytesleft,
   87         int convchar, int casetype)
   88 {
   89         struct iconv_xlat *dp = (struct iconv_xlat*)d2p;
   90         const char *src;
   91         char *dst;
   92         int n, r;
   93 
   94         if (inbuf == NULL || *inbuf == NULL || outbuf == NULL || *outbuf == NULL)
   95                 return 0;
   96         if (casetype != 0)
   97                 return -1;
   98         if (convchar == 1)
   99                 r = n = 1;
  100         else
  101                 r = n = min(*inbytesleft, *outbytesleft);
  102         src = *inbuf;
  103         dst = *outbuf;
  104         while(r--)
  105                 *dst++ = dp->d_table[(u_char)*src++];
  106         *inbuf += n;
  107         *outbuf += n;
  108         *inbytesleft -= n;
  109         *outbytesleft -= n;
  110         return 0;
  111 }
  112 
  113 static const char *
  114 iconv_xlat_name(struct iconv_converter_class *dcp)
  115 {
  116         return "xlat";
  117 }
  118 
  119 static kobj_method_t iconv_xlat_methods[] = {
  120         KOBJMETHOD(iconv_converter_open,        iconv_xlat_open),
  121         KOBJMETHOD(iconv_converter_close,       iconv_xlat_close),
  122         KOBJMETHOD(iconv_converter_conv,        iconv_xlat_conv),
  123 #if 0
  124         KOBJMETHOD(iconv_converter_init,        iconv_xlat_init),
  125         KOBJMETHOD(iconv_converter_done,        iconv_xlat_done),
  126 #endif
  127         KOBJMETHOD(iconv_converter_name,        iconv_xlat_name),
  128         KOBJMETHOD_END
  129 };
  130 
  131 KICONV_CONVERTER(xlat, sizeof(struct iconv_xlat));

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

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