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      8  * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel (at) haxx.se>, et al.
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     22 /* <DESC>
     23  * This is a simple example showing how a program on a non-ASCII platform
     24  * would invoke callbacks to do its own codeset conversions instead of
     25  * using the built-in iconv functions in libcurl.
     26  * </DESC>
     27  */
     28 /*
     29 
     30    The IBM-1047 EBCDIC codeset is used for this example but the code
     31    would be similar for other non-ASCII codesets.
     32 
     33    Three callback functions are created below:
     34         my_conv_from_ascii_to_ebcdic,
     35         my_conv_from_ebcdic_to_ascii, and
     36         my_conv_from_utf8_to_ebcdic
     37 
     38    The "platform_xxx" calls represent platform-specific conversion routines.
     39 
     40  */
     41 
     42 #include <stdio.h>
     43 #include <curl/curl.h>
     44 
     45 CURLcode my_conv_from_ascii_to_ebcdic(char *buffer, size_t length)
     46 {
     47     char *tempptrin, *tempptrout;
     48     size_t bytes = length;
     49     int rc;
     50     tempptrin = tempptrout = buffer;
     51     rc = platform_a2e(&tempptrin, &bytes, &tempptrout, &bytes);
     52     if(rc == PLATFORM_CONV_OK) {
     53       return CURLE_OK;
     54     }
     55     else {
     56       return CURLE_CONV_FAILED;
     57     }
     58 }
     59 
     60 CURLcode my_conv_from_ebcdic_to_ascii(char *buffer, size_t length)
     61 {
     62     char *tempptrin, *tempptrout;
     63     size_t bytes = length;
     64     int rc;
     65     tempptrin = tempptrout = buffer;
     66     rc = platform_e2a(&tempptrin, &bytes, &tempptrout, &bytes);
     67     if(rc == PLATFORM_CONV_OK) {
     68       return CURLE_OK;
     69     }
     70     else {
     71       return CURLE_CONV_FAILED;
     72     }
     73 }
     74 
     75 CURLcode my_conv_from_utf8_to_ebcdic(char *buffer, size_t length)
     76 {
     77     char *tempptrin, *tempptrout;
     78     size_t bytes = length;
     79     int rc;
     80     tempptrin = tempptrout = buffer;
     81     rc = platform_u2e(&tempptrin, &bytes, &tempptrout, &bytes);
     82     if(rc == PLATFORM_CONV_OK) {
     83       return CURLE_OK;
     84     }
     85     else {
     86       return CURLE_CONV_FAILED;
     87     }
     88 }
     89 
     90 int main(void)
     91 {
     92   CURL *curl;
     93   CURLcode res;
     94 
     95   curl = curl_easy_init();
     96   if(curl) {
     97     curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
     98 
     99     /* use platform-specific functions for codeset conversions */
    100     curl_easy_setopt(curl, CURLOPT_CONV_FROM_NETWORK_FUNCTION,
    101                      my_conv_from_ascii_to_ebcdic);
    102     curl_easy_setopt(curl, CURLOPT_CONV_TO_NETWORK_FUNCTION,
    103                      my_conv_from_ebcdic_to_ascii);
    104     curl_easy_setopt(curl, CURLOPT_CONV_FROM_UTF8_FUNCTION,
    105                      my_conv_from_utf8_to_ebcdic);
    106 
    107     res = curl_easy_perform(curl);
    108 
    109     /* always cleanup */
    110     curl_easy_cleanup(curl);
    111   }
    112   return 0;
    113 }
    114