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+---
+c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_CONV_FROM_UTF8_FUNCTION
+Section: 3
+Source: libcurl
+See-also:
+  - CURLOPT_CONV_FROM_NETWORK_FUNCTION (3)
+  - CURLOPT_CONV_TO_NETWORK_FUNCTION (3)
+---
+
+# NAME
+
+CURLOPT_CONV_FROM_UTF8_FUNCTION - convert data from UTF8 to host encoding
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode conv_callback(char *ptr, size_t length);
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CONV_FROM_UTF8_FUNCTION,
+                          conv_callback);
+~~~
+
+# DESCRIPTION
+
+Pass a pointer to your callback function, which should match the prototype
+shown above.
+
+Applies to non-ASCII platforms. curl_version_info(3) returns the
+CURL_VERSION_CONV feature bit set if this option is provided.
+
+The data to be converted is in a buffer pointed to by the *ptr* parameter.
+The amount of data to convert is indicated by the *length* parameter. The
+converted data overlays the input data in the buffer pointed to by the ptr
+parameter. *CURLE_OK* must be returned upon successful conversion. A
+CURLcode return value defined by curl.h, such as *CURLE_CONV_FAILED*,
+should be returned if an error was encountered.
+
+CURLOPT_CONV_FROM_UTF8_FUNCTION(3) converts to host encoding from UTF8
+encoding. It is required only for SSL processing.
+
+If you set a callback pointer to NULL, or do not set it at all, the built-in
+libcurl iconv functions are used. If HAVE_ICONV was not defined when libcurl
+was built, and no callback has been established, the conversion returns the
+CURLE_CONV_REQD error code.
+
+If HAVE_ICONV is defined, CURL_ICONV_CODESET_OF_HOST must also be defined.
+For example:
+~~~c
+ #define CURL_ICONV_CODESET_OF_HOST "IBM-1047"
+~~~
+
+The iconv code in libcurl defaults the network and UTF8 codeset names as
+follows:
+~~~c
+#define CURL_ICONV_CODESET_OF_NETWORK "ISO8859-1"
+
+#define CURL_ICONV_CODESET_FOR_UTF8   "UTF-8"
+~~~
+
+You need to override these definitions if they are different on your system.
+
+# DEFAULT
+
+NULL
+
+# PROTOCOLS
+
+TLS-based protocols.
+
+# EXAMPLE
+
+~~~c
+static CURLcode my_conv_from_utf8_to_ebcdic(char *buffer, size_t length)
+{
+  int rc = 0;
+  /* in-place convert 'buffer' from UTF-8 to EBCDIC */
+  if(rc == 0) {
+    /* success */
+    return CURLE_OK;
+  }
+  else {
+    return CURLE_CONV_FAILED;
+  }
+}
+
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  curl_easy_setopt(curl, CURLOPT_CONV_FROM_UTF8_FUNCTION,
+                   my_conv_from_utf8_to_ebcdic);
+}
+~~~
+
+# AVAILABILITY
+
+Not available and deprecated since 7.82.0.
+
+Available only if **CURL_DOES_CONVERSIONS** was defined when libcurl was
+built.
+
+# RETURN VALUE
+
+Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.