sys/libiconv/iconv_xlat.c

   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));