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comparison mupdf-source/thirdparty/curl/docs/examples/sampleconv.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2018, 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 /* <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 static 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 static 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 static 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
94 curl = curl_easy_init();
95 if(curl) {
96 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
97
98 /* use platform-specific functions for codeset conversions */
99 curl_easy_setopt(curl, CURLOPT_CONV_FROM_NETWORK_FUNCTION,
100 my_conv_from_ascii_to_ebcdic);
101 curl_easy_setopt(curl, CURLOPT_CONV_TO_NETWORK_FUNCTION,
102 my_conv_from_ebcdic_to_ascii);
103 curl_easy_setopt(curl, CURLOPT_CONV_FROM_UTF8_FUNCTION,
104 my_conv_from_utf8_to_ebcdic);
105
106 curl_easy_perform(curl);
107
108 /* always cleanup */
109 curl_easy_cleanup(curl);
110 }
111 return 0;
112 }