--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/curl/docs/examples/sampleconv.c	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,112 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+/* <DESC>
+ * This is a simple example showing how a program on a non-ASCII platform
+ * would invoke callbacks to do its own codeset conversions instead of
+ * using the built-in iconv functions in libcurl.
+ * </DESC>
+ */
+/*
+
+   The IBM-1047 EBCDIC codeset is used for this example but the code
+   would be similar for other non-ASCII codesets.
+
+   Three callback functions are created below:
+        my_conv_from_ascii_to_ebcdic,
+        my_conv_from_ebcdic_to_ascii, and
+        my_conv_from_utf8_to_ebcdic
+
+   The "platform_xxx" calls represent platform-specific conversion routines.
+
+ */
+
+#include <stdio.h>
+#include <curl/curl.h>
+
+static CURLcode my_conv_from_ascii_to_ebcdic(char *buffer, size_t length)
+{
+  char *tempptrin, *tempptrout;
+  size_t bytes = length;
+  int rc;
+  tempptrin = tempptrout = buffer;
+  rc = platform_a2e(&tempptrin, &bytes, &tempptrout, &bytes);
+  if(rc == PLATFORM_CONV_OK) {
+    return CURLE_OK;
+  }
+  else {
+    return CURLE_CONV_FAILED;
+  }
+}
+
+static CURLcode my_conv_from_ebcdic_to_ascii(char *buffer, size_t length)
+{
+  char *tempptrin, *tempptrout;
+  size_t bytes = length;
+  int rc;
+  tempptrin = tempptrout = buffer;
+  rc = platform_e2a(&tempptrin, &bytes, &tempptrout, &bytes);
+  if(rc == PLATFORM_CONV_OK) {
+    return CURLE_OK;
+  }
+  else {
+    return CURLE_CONV_FAILED;
+  }
+}
+
+static CURLcode my_conv_from_utf8_to_ebcdic(char *buffer, size_t length)
+{
+  char *tempptrin, *tempptrout;
+  size_t bytes = length;
+  int rc;
+  tempptrin = tempptrout = buffer;
+  rc = platform_u2e(&tempptrin, &bytes, &tempptrout, &bytes);
+  if(rc == PLATFORM_CONV_OK) {
+    return CURLE_OK;
+  }
+  else {
+    return CURLE_CONV_FAILED;
+  }
+}
+
+int main(void)
+{
+  CURL *curl;
+
+  curl = curl_easy_init();
+  if(curl) {
+    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
+
+    /* use platform-specific functions for codeset conversions */
+    curl_easy_setopt(curl, CURLOPT_CONV_FROM_NETWORK_FUNCTION,
+                     my_conv_from_ascii_to_ebcdic);
+    curl_easy_setopt(curl, CURLOPT_CONV_TO_NETWORK_FUNCTION,
+                     my_conv_from_ebcdic_to_ascii);
+    curl_easy_setopt(curl, CURLOPT_CONV_FROM_UTF8_FUNCTION,
+                     my_conv_from_utf8_to_ebcdic);
+
+    curl_easy_perform(curl);
+
+    /* always cleanup */
+    curl_easy_cleanup(curl);
+  }
+  return 0;
+}