[Qemu-devel] [PATCHv3 7/9] export qemu_sendv_recvv() and use it in qemu_sendv() and qemu_recvv()

[Michael Tokarev <mjt@tls.msk.ru>]

Rename do_sendv_recvv() to qemu_sendv_recvv(),
change its last arg (do_sendv) from int to bool,
export it in qemu-common.h, and made the two
callers of it (qemu_sendv() and qemu_recvv())
to be trivial #defines just adding 5th arg.

qemu_sendv_recvv() will be used later.

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
---
 cutils.c      |   19 ++++---------------
 qemu-common.h |   14 ++++++++++++--
 2 files changed, 16 insertions(+), 17 deletions(-)

diff --git a/cutils.c b/cutils.c
index e9052fc..be2173f 100644
--- a/cutils.c
+++ b/cutils.c
@@ -383,7 +383,7 @@ int qemu_parse_fd(const char *param)
  * The first `offset' bytes in the iovec buffer are skipped and next
  * `bytes' bytes are used, which must be within data of iovec.
  *
- *   r = do_sendv_recvv(sockfd, iov, offset, bytes, 1);
+ *   r = qemu_sendv_recvv(sockfd, iov, offset, butes, true);
  *
  * is logically equivalent to
  *
@@ -392,9 +392,9 @@ int qemu_parse_fd(const char *param)
  *   r = send(sockfd, buf, size, 0);
  *   free(buf);
  */
-static ssize_t do_sendv_recvv(int sockfd, struct iovec *iov,
-                          size_t offset, size_t bytes,
-                          int do_sendv)
+ssize_t qemu_sendv_recvv(int sockfd, struct iovec *iov,
+                         size_t offset, size_t bytes,
+                         bool do_sendv)
 {
     int iovlen;
     ssize_t ret;
@@ -474,14 +474,3 @@ static ssize_t do_sendv_recvv(int sockfd, struct iovec *iov,
     last_iov->iov_len += diff;
     return ret;
 }
-
-ssize_t qemu_recvv(int sockfd, struct iovec *iov, size_t offset, size_t bytes)
-{
-    return do_sendv_recvv(sockfd, iov, offset, bytes, 0);
-}
-
-ssize_t qemu_sendv(int sockfd, struct iovec *iov, size_t offset, size_t bytes)
-{
-    return do_sendv_recvv(sockfd, iov, offset, bytes, 1);
-}
-
diff --git a/qemu-common.h b/qemu-common.h
index 8d12fca..b01d84c 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -199,8 +199,18 @@ int qemu_pipe(int pipefd[2]);
 #define qemu_recv(sockfd, buf, len, flags) recv(sockfd, buf, len, flags)
 #endif
 
-ssize_t qemu_recvv(int sockfd, struct iovec *iov, size_t offset, size_t bytes);
-ssize_t qemu_sendv(int sockfd, struct iovec *iov, size_t offset, size_t bytes);
+/**
+ * Send or receive data from/to an (optionally partial) iovec.
+ * Instead of processing whole iovector, this routine can process
+ * not more than a specified number of bytes, and start not at
+ * the beginning of iovec but at byte position `offset'.
+ */
+ssize_t qemu_sendv_recvv(int sockfd, struct iovec *iov,
+                         size_t offset, size_t bytes, bool do_sendv);
+#define qemu_recvv(sockfd, iov, offset, bytes) \
+  qemu_sendv_recvv(sockfd, iov, offset, bytes, false)
+#define qemu_sendv(sockfd, iov, offset, bytes) \
+  qemu_sendv_recvv(sockfd, iov, offset, bytes, true)
 
 /* Error handling.  */
 
-- 
1.7.9.1