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    1: /***************************************************************************
    2:  *                                  _   _ ____  _
    3:  *  Project                     ___| | | |  _ \| |
    4:  *                             / __| | | | |_) | |
    5:  *                            | (__| |_| |  _ <| |___
    6:  *                             \___|\___/|_| \_\_____|
    7:  *
    8:  * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
    9:  *
   10:  * This software is licensed as described in the file COPYING, which
   11:  * you should have received as part of this distribution. The terms
   12:  * are also available at https://curl.haxx.se/docs/copyright.html.
   13:  *
   14:  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
   15:  * copies of the Software, and permit persons to whom the Software is
   16:  * furnished to do so, under the terms of the COPYING file.
   17:  *
   18:  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
   19:  * KIND, either express or implied.
   20:  *
   21:  ***************************************************************************/
   22: #include "tool_setup.h"
   23: 
   24: #ifdef CURL_DOES_CONVERSIONS
   25: 
   26: #ifdef HAVE_ICONV
   27: #  include <iconv.h>
   28: #endif
   29: 
   30: #include "tool_convert.h"
   31: 
   32: #include "memdebug.h" /* keep this as LAST include */
   33: 
   34: #ifdef HAVE_ICONV
   35: 
   36: /* curl tool iconv conversion descriptors */
   37: static iconv_t inbound_cd  = (iconv_t)-1;
   38: static iconv_t outbound_cd = (iconv_t)-1;
   39: 
   40: /* set default codesets for iconv */
   41: #ifndef CURL_ICONV_CODESET_OF_NETWORK
   42: #  define CURL_ICONV_CODESET_OF_NETWORK "ISO8859-1"
   43: #endif
   44: 
   45: /*
   46:  * convert_to_network() is a curl tool function to convert
   47:  * from the host encoding to ASCII on non-ASCII platforms.
   48:  */
   49: CURLcode convert_to_network(char *buffer, size_t length)
   50: {
   51:   /* translate from the host encoding to the network encoding */
   52:   char *input_ptr, *output_ptr;
   53:   size_t res, in_bytes, out_bytes;
   54: 
   55:   /* open an iconv conversion descriptor if necessary */
   56:   if(outbound_cd == (iconv_t)-1) {
   57:     outbound_cd = iconv_open(CURL_ICONV_CODESET_OF_NETWORK,
   58:                              CURL_ICONV_CODESET_OF_HOST);
   59:     if(outbound_cd == (iconv_t)-1) {
   60:       return CURLE_CONV_FAILED;
   61:     }
   62:   }
   63:   /* call iconv */
   64:   input_ptr = output_ptr = buffer;
   65:   in_bytes = out_bytes = length;
   66:   res = iconv(outbound_cd, &input_ptr,  &in_bytes,
   67:               &output_ptr, &out_bytes);
   68:   if((res == (size_t)-1) || (in_bytes != 0)) {
   69:     return CURLE_CONV_FAILED;
   70:   }
   71: 
   72:   return CURLE_OK;
   73: }
   74: 
   75: /*
   76:  * convert_from_network() is a curl tool function
   77:  * for performing ASCII conversions on non-ASCII platforms.
   78:  */
   79: CURLcode convert_from_network(char *buffer, size_t length)
   80: {
   81:   /* translate from the network encoding to the host encoding */
   82:   char *input_ptr, *output_ptr;
   83:   size_t res, in_bytes, out_bytes;
   84: 
   85:   /* open an iconv conversion descriptor if necessary */
   86:   if(inbound_cd == (iconv_t)-1) {
   87:     inbound_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
   88:                             CURL_ICONV_CODESET_OF_NETWORK);
   89:     if(inbound_cd == (iconv_t)-1) {
   90:       return CURLE_CONV_FAILED;
   91:     }
   92:   }
   93:   /* call iconv */
   94:   input_ptr = output_ptr = buffer;
   95:   in_bytes = out_bytes = length;
   96:   res = iconv(inbound_cd, &input_ptr,  &in_bytes,
   97:               &output_ptr, &out_bytes);
   98:   if((res == (size_t)-1) || (in_bytes != 0)) {
   99:     return CURLE_CONV_FAILED;
  100:   }
  101: 
  102:   return CURLE_OK;
  103: }
  104: 
  105: void convert_cleanup(void)
  106: {
  107:   /* close iconv conversion descriptors */
  108:   if(inbound_cd != (iconv_t)-1)
  109:     (void)iconv_close(inbound_cd);
  110:   if(outbound_cd != (iconv_t)-1)
  111:     (void)iconv_close(outbound_cd);
  112: }
  113: 
  114: #endif /* HAVE_ICONV */
  115: 
  116: char convert_char(curl_infotype infotype, char this_char)
  117: {
  118: /* determine how this specific character should be displayed */
  119:   switch(infotype) {
  120:   case CURLINFO_DATA_IN:
  121:   case CURLINFO_DATA_OUT:
  122:   case CURLINFO_SSL_DATA_IN:
  123:   case CURLINFO_SSL_DATA_OUT:
  124:     /* data, treat as ASCII */
  125:     if(this_char < 0x20 || this_char >= 0x7f) {
  126:       /* non-printable ASCII, use a replacement character */
  127:       return UNPRINTABLE_CHAR;
  128:     }
  129:     /* printable ASCII hex value: convert to host encoding */
  130:     (void)convert_from_network(&this_char, 1);
  131:     /* FALLTHROUGH */
  132:   default:
  133:     /* treat as host encoding */
  134:     if(ISPRINT(this_char)
  135:        &&  (this_char != '\t')
  136:        &&  (this_char != '\r')
  137:        &&  (this_char != '\n')) {
  138:       /* printable characters excluding tabs and line end characters */
  139:       return this_char;
  140:     }
  141:     break;
  142:   }
  143:   /* non-printable, use a replacement character  */
  144:   return UNPRINTABLE_CHAR;
  145: }
  146: 
  147: #endif /* CURL_DOES_CONVERSIONS */