[PATCH v3 3/5] remote-curl: define struct for CURLOPT_WRITEFUNCTION

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In order to pass more values for rpc_in, define a struct and pass it as
an additional value.

Signed-off-by: Masaya Suzuki <masayasuzuki@xxxxxxxxxx>
---
 remote-curl.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/remote-curl.c b/remote-curl.c
index d8eda2380a..d4673b6e8c 100644
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -545,14 +545,22 @@ static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
 }
 #endif
 
+struct rpc_in_data {
+	struct rpc_state *rpc;
+};
+
+/*
+ * A callback for CURLOPT_WRITEFUNCTION. The return value is the bytes consumed
+ * from ptr.
+ */
 static size_t rpc_in(char *ptr, size_t eltsize,
 		size_t nmemb, void *buffer_)
 {
 	size_t size = eltsize * nmemb;
-	struct rpc_state *rpc = buffer_;
+	struct rpc_in_data *data = buffer_;
 	if (size)
-		rpc->any_written = 1;
-	write_or_die(rpc->in, ptr, size);
+		data->rpc->any_written = 1;
+	write_or_die(data->rpc->in, ptr, size);
 	return size;
 }
 
@@ -632,6 +640,7 @@ static int post_rpc(struct rpc_state *rpc)
 	size_t gzip_size = 0;
 	int err, large_request = 0;
 	int needs_100_continue = 0;
+	struct rpc_in_data rpc_in_data;
 
 	/* Try to load the entire request, if we can fit it into the
 	 * allocated buffer space we can use HTTP/1.0 and avoid the
@@ -764,7 +773,8 @@ static int post_rpc(struct rpc_state *rpc)
 
 	curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 	curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
-	curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
+	rpc_in_data.rpc = rpc;
+	curl_easy_setopt(slot->curl, CURLOPT_FILE, &rpc_in_data);
 
 
 	rpc->any_written = 0;
-- 
2.20.1.97.g81188d93c3-goog




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