CURLOPT_UPLOAD_BUFFERSIZE: set upload buffer size

This is step 3 of #2888.

Fixes #2888
Closes #2896

1 files changed, 2 insertions, 10 deletions

diff --git a/lib/urldata.h b/lib/urldata.h
index 769ab4fa4..d3a174d24 100644
--- a/lib/urldata.h
+++ b/lib/urldata.h
@@ -142,14 +142,6 @@ typedef ssize_t (Curl_recv)(struct connectdata *conn, /* connection data */
 #include <libssh2_sftp.h>
 #endif /* HAVE_LIBSSH2_H */
 
-/* The upload buffer size, should not be smaller than CURL_MAX_WRITE_SIZE, as
-   it needs to hold a full buffer as could be sent in a write callback.
-
-   The size was 16KB for many years but was bumped to 64KB because it makes
-   libcurl able to do significantly faster uploads in some circumstances. Even
-   larger buffers can help further, but this is deemed a fair memory/speed
-   compromise. */
-#define UPLOAD_BUFSIZE 65536
 
 /* The "master buffer" is for HTTP pipelining */
 #define MASTERBUF_SIZE 16384
@@ -1585,8 +1577,8 @@ struct UserDefined {
   curl_proxytype proxytype; /* what kind of proxy that is in use */
   long dns_cache_timeout; /* DNS cache timeout */
   long buffer_size;      /* size of receive buffer to use */
-  long upload_buffer_size; /* size of upload buffer to use,
-                              keep it >= CURL_MAX_WRITE_SIZE */
+  size_t upload_buffer_size; /* size of upload buffer to use,
+                                keep it >= CURL_MAX_WRITE_SIZE */
   void *private_data; /* application-private data */
 
   struct curl_slist *http200aliases; /* linked list of aliases for http200 */