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Annotation of embedaddon/curl/src/tool_convert.c, revision 1.1.1.1

1.1       misho       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 */