1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2011, 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 http://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 /*
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
27 The IBM-1047 EBCDIC codeset is used for this example but the code
28 would be similar for other non-ASCII codesets.
29
30 Three callback functions are created below:
31 my_conv_from_ascii_to_ebcdic,
32 my_conv_from_ebcdic_to_ascii, and
33 my_conv_from_utf8_to_ebcdic
34
35 The "platform_xxx" calls represent platform-specific conversion routines.
36
37 */
38
39 #include <stdio.h>
40 #include <curl/curl.h>
41
my_conv_from_ascii_to_ebcdic(char * buffer,size_t length)42 CURLcode my_conv_from_ascii_to_ebcdic(char *buffer, size_t length)
43 {
44 char *tempptrin, *tempptrout;
45 size_t bytes = length;
46 int rc;
47 tempptrin = tempptrout = buffer;
48 rc = platform_a2e(&tempptrin, &bytes, &tempptrout, &bytes);
49 if (rc == PLATFORM_CONV_OK) {
50 return(CURLE_OK);
51 } else {
52 return(CURLE_CONV_FAILED);
53 }
54 }
55
my_conv_from_ebcdic_to_ascii(char * buffer,size_t length)56 CURLcode my_conv_from_ebcdic_to_ascii(char *buffer, size_t length)
57 {
58 char *tempptrin, *tempptrout;
59 size_t bytes = length;
60 int rc;
61 tempptrin = tempptrout = buffer;
62 rc = platform_e2a(&tempptrin, &bytes, &tempptrout, &bytes);
63 if (rc == PLATFORM_CONV_OK) {
64 return(CURLE_OK);
65 } else {
66 return(CURLE_CONV_FAILED);
67 }
68 }
69
my_conv_from_utf8_to_ebcdic(char * buffer,size_t length)70 CURLcode my_conv_from_utf8_to_ebcdic(char *buffer, size_t length)
71 {
72 char *tempptrin, *tempptrout;
73 size_t bytes = length;
74 int rc;
75 tempptrin = tempptrout = buffer;
76 rc = platform_u2e(&tempptrin, &bytes, &tempptrout, &bytes);
77 if (rc == PLATFORM_CONV_OK) {
78 return(CURLE_OK);
79 } else {
80 return(CURLE_CONV_FAILED);
81 }
82 }
83
main(void)84 int main(void)
85 {
86 CURL *curl;
87 CURLcode res;
88
89 curl = curl_easy_init();
90 if(curl) {
91 curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
92
93 /* use platform-specific functions for codeset conversions */
94 curl_easy_setopt(curl, CURLOPT_CONV_FROM_NETWORK_FUNCTION,
95 my_conv_from_ascii_to_ebcdic);
96 curl_easy_setopt(curl, CURLOPT_CONV_TO_NETWORK_FUNCTION,
97 my_conv_from_ebcdic_to_ascii);
98 curl_easy_setopt(curl, CURLOPT_CONV_FROM_UTF8_FUNCTION,
99 my_conv_from_utf8_to_ebcdic);
100
101 res = curl_easy_perform(curl);
102
103 /* always cleanup */
104 curl_easy_cleanup(curl);
105 }
106 return 0;
107 }
108