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 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD: releng/8.3/sys/libkern/iconv_xlat.c 215743 2010-11-23 13:25:27Z zec $");
   35 
   36 #include <sys/param.h>
   37 #include <sys/kernel.h>
   38 #include <sys/systm.h>
   39 #include <sys/malloc.h>
   40 #include <sys/iconv.h>
   41 
   42 #include "iconv_converter_if.h"
   43 
   44 /*
   45  * "XLAT" converter
   46  */
   47 
   48 #ifdef MODULE_DEPEND
   49 MODULE_DEPEND(iconv_xlat, libiconv, 2, 2, 2);
   50 #endif
   51 
   52 /*
   53  * XLAT converter instance
   54  */
   55 struct iconv_xlat {
   56         KOBJ_FIELDS;
   57         u_char *                d_table;
   58         struct iconv_cspair *   d_csp;
   59 };
   60 
   61 static int
   62 iconv_xlat_open(struct iconv_converter_class *dcp,
   63         struct iconv_cspair *csp, struct iconv_cspair *cspf, void **dpp)
   64 {
   65         struct iconv_xlat *dp;
   66 
   67         dp = (struct iconv_xlat *)kobj_create((struct kobj_class*)dcp, M_ICONV, M_WAITOK);
   68         dp->d_table = csp->cp_data;
   69         dp->d_csp = csp;
   70         csp->cp_refcount++;
   71         *dpp = (void*)dp;
   72         return 0;
   73 }
   74 
   75 static int
   76 iconv_xlat_close(void *data)
   77 {
   78         struct iconv_xlat *dp = data;
   79 
   80         dp->d_csp->cp_refcount--;
   81         kobj_delete((struct kobj*)data, M_ICONV);
   82         return 0;
   83 }
   84 
   85 static int
   86 iconv_xlat_conv(void *d2p, const char **inbuf,
   87         size_t *inbytesleft, char **outbuf, size_t *outbytesleft,
   88         int convchar, int casetype)
   89 {
   90         struct iconv_xlat *dp = (struct iconv_xlat*)d2p;
   91         const char *src;
   92         char *dst;
   93         int n, r;
   94 
   95         if (inbuf == NULL || *inbuf == NULL || outbuf == NULL || *outbuf == NULL)
   96                 return 0;
   97         if (casetype != 0)
   98                 return -1;
   99         if (convchar == 1)
  100                 r = n = 1;
  101         else
  102                 r = n = min(*inbytesleft, *outbytesleft);
  103         src = *inbuf;
  104         dst = *outbuf;
  105         while(r--)
  106                 *dst++ = dp->d_table[(u_char)*src++];
  107         *inbuf += n;
  108         *outbuf += n;
  109         *inbytesleft -= n;
  110         *outbytesleft -= n;
  111         return 0;
  112 }
  113 
  114 static const char *
  115 iconv_xlat_name(struct iconv_converter_class *dcp)
  116 {
  117         return "xlat";
  118 }
  119 
  120 static kobj_method_t iconv_xlat_methods[] = {
  121         KOBJMETHOD(iconv_converter_open,        iconv_xlat_open),
  122         KOBJMETHOD(iconv_converter_close,       iconv_xlat_close),
  123         KOBJMETHOD(iconv_converter_conv,        iconv_xlat_conv),
  124 #if 0
  125         KOBJMETHOD(iconv_converter_init,        iconv_xlat_init),
  126         KOBJMETHOD(iconv_converter_done,        iconv_xlat_done),
  127 #endif
  128         KOBJMETHOD(iconv_converter_name,        iconv_xlat_name),
  129         {0, 0}
  130 };
  131 
  132 KICONV_CONVERTER(xlat, sizeof(struct iconv_xlat));

Cache object: daea026ddc415c988c682fc5fbe17726


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