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