[FFmpeg-devel] [PATCH v4 3/5] avformat/network: add ff_neterror2() for cases where we already have an error

[Andrew Sayers]

For example, WSAStartup()'s documentation says:

    "A call to the WSAGetLastError function is not needed and should not be used"
---
 libavformat/network.c |  5 ++++-
 libavformat/network.h | 12 ++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/libavformat/network.c b/libavformat/network.c
index 5d0d05c5f1..351dc34bb6 100644
--- a/libavformat/network.c
+++ b/libavformat/network.c
@@ -123,7 +123,10 @@ void ff_network_close(void)
 #if HAVE_WINSOCK2_H
 int ff_neterror(void)
 {
-    int err = WSAGetLastError();
+    return ff_neterror2(WSAGetLastError());
+}
+int ff_neterror2(int err)
+{
     switch (err) {
     case WSAEWOULDBLOCK:
         return AVERROR(EAGAIN);
diff --git a/libavformat/network.h b/libavformat/network.h
index f338694212..7c8f81a050 100644
--- a/libavformat/network.h
+++ b/libavformat/network.h
@@ -63,6 +63,12 @@
  * @note Error is based on WSAGetLastError() (Windows) or `errno` (otherwise)
  */
 int ff_neterror(void);
+/*
+ * @brief ff_neterror()-style AVERROR
+ * @param err error code (usually an errno or Windows Sockets Error Code)
+ * @note Windows Sockets Error Codes are only supported in Windows
+ */
+int ff_neterror2(int err);
 #else
 #include <sys/types.h>
 #include <sys/socket.h>
@@ -76,6 +82,12 @@ int ff_neterror(void);
  * @note Error is based on WSAGetLastError() (Windows) or `errno` (otherwise)
  */
 #define ff_neterror() AVERROR(errno)
+/*
+ * @brief ff_neterror()-style AVERROR
+ * @param err error code (usually an errno or Windows Sockets Error Code)
+ * @note Windows Sockets Error Codes are only supported in Windows
+ */
+#define ff_neterror2(ERRNO) AVERROR(ERRNO)
 #endif /* HAVE_WINSOCK2_H */
 
 #if HAVE_ARPA_INET_H
-- 
2.43.0