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