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comparison mupdf-source/thirdparty/curl/docs/examples/progressfunc.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 * Use the progress callbacks, old and/or new one depending on available
24 * libcurl version.
25 * </DESC>
26 */
27 #include <stdio.h>
28 #include <curl/curl.h>
29
30 #if LIBCURL_VERSION_NUM >= 0x073d00
31 /* In libcurl 7.61.0, support was added for extracting the time in plain
32 microseconds. Older libcurl versions are stuck in using 'double' for this
33 information so we complicate this example a bit by supporting either
34 approach. */
35 #define TIME_IN_US 1 /* microseconds */
36 #define TIMETYPE curl_off_t
37 #define TIMEOPT CURLINFO_TOTAL_TIME_T
38 #define MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL 3000000
39 #else
40 #define TIMETYPE double
41 #define TIMEOPT CURLINFO_TOTAL_TIME
42 #define MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL 3
43 #endif
44
45 #define STOP_DOWNLOAD_AFTER_THIS_MANY_BYTES 6000
46
47 struct myprogress {
48 TIMETYPE lastruntime; /* type depends on version, see above */
49 CURL *curl;
50 };
51
52 /* this is how the CURLOPT_XFERINFOFUNCTION callback works */
53 static int xferinfo(void *p,
54 curl_off_t dltotal, curl_off_t dlnow,
55 curl_off_t ultotal, curl_off_t ulnow)
56 {
57 struct myprogress *myp = (struct myprogress *)p;
58 CURL *curl = myp->curl;
59 TIMETYPE curtime = 0;
60
61 curl_easy_getinfo(curl, TIMEOPT, &curtime);
62
63 /* under certain circumstances it may be desirable for certain functionality
64 to only run every N seconds, in order to do this the transaction time can
65 be used */
66 if((curtime - myp->lastruntime) >= MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL) {
67 myp->lastruntime = curtime;
68 #ifdef TIME_IN_US
69 fprintf(stderr, "TOTAL TIME: %" CURL_FORMAT_CURL_OFF_T ".%06ld\r\n",
70 (curtime / 1000000), (long)(curtime % 1000000));
71 #else
72 fprintf(stderr, "TOTAL TIME: %f \r\n", curtime);
73 #endif
74 }
75
76 fprintf(stderr, "UP: %" CURL_FORMAT_CURL_OFF_T " of %" CURL_FORMAT_CURL_OFF_T
77 " DOWN: %" CURL_FORMAT_CURL_OFF_T " of %" CURL_FORMAT_CURL_OFF_T
78 "\r\n",
79 ulnow, ultotal, dlnow, dltotal);
80
81 if(dlnow > STOP_DOWNLOAD_AFTER_THIS_MANY_BYTES)
82 return 1;
83 return 0;
84 }
85
86 #if LIBCURL_VERSION_NUM < 0x072000
87 /* for libcurl older than 7.32.0 (CURLOPT_PROGRESSFUNCTION) */
88 static int older_progress(void *p,
89 double dltotal, double dlnow,
90 double ultotal, double ulnow)
91 {
92 return xferinfo(p,
93 (curl_off_t)dltotal,
94 (curl_off_t)dlnow,
95 (curl_off_t)ultotal,
96 (curl_off_t)ulnow);
97 }
98 #endif
99
100 int main(void)
101 {
102 CURL *curl;
103 CURLcode res = CURLE_OK;
104 struct myprogress prog;
105
106 curl = curl_easy_init();
107 if(curl) {
108 prog.lastruntime = 0;
109 prog.curl = curl;
110
111 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
112
113 #if LIBCURL_VERSION_NUM >= 0x072000
114 /* xferinfo was introduced in 7.32.0, no earlier libcurl versions will
115 compile as they won't have the symbols around.
116
117 If built with a newer libcurl, but running with an older libcurl:
118 curl_easy_setopt() will fail in run-time trying to set the new
119 callback, making the older callback get used.
120
121 New libcurls will prefer the new callback and instead use that one even
122 if both callbacks are set. */
123
124 curl_easy_setopt(curl, CURLOPT_XFERINFOFUNCTION, xferinfo);
125 /* pass the struct pointer into the xferinfo function, note that this is
126 an alias to CURLOPT_PROGRESSDATA */
127 curl_easy_setopt(curl, CURLOPT_XFERINFODATA, &prog);
128 #else
129 curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, older_progress);
130 /* pass the struct pointer into the progress function */
131 curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, &prog);
132 #endif
133
134 curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);
135 res = curl_easy_perform(curl);
136
137 if(res != CURLE_OK)
138 fprintf(stderr, "%s\n", curl_easy_strerror(res));
139
140 /* always cleanup */
141 curl_easy_cleanup(curl);
142 }
143 return (int)res;
144 }