[C] Fix warnings.

Author: mjpt777

aeron-driver/src/main/c/aeron_network_publication.c

@@ -401,10 +401,11 @@ int aeron_network_publication_send_data(
             mmsghdr[i].msg_hdr.msg_controllen = 0;
             vlen++;
 
-            bytes_sent += available;
-            available_window -= available + padding;
-            term_offset += available + padding;
-            highest_pos += available + padding;
+            bytes_sent += (int)available;
+            int32_t total_available = (int32_t)(available + padding);
+            available_window -= total_available;
+            term_offset += total_available;
+            highest_pos += total_available;
         }
 
         if (available == 0 || term_length == (size_t)term_offset)

aeron-driver/src/main/c/aeronmd.c

@@ -61,11 +61,12 @@ int set_property(void *clientd, const char *name, const char *value)
 int main(int argc, char **argv)
 {
     int status = EXIT_FAILURE;
-    int opt;
     aeron_driver_context_t *context = NULL;
     aeron_driver_t *driver = NULL;
 
 #ifndef _MSC_VER
+    int opt;
+
     while ((opt = getopt(argc, argv, "D:v")) != -1)
     {
         switch (opt)

aeron-driver/src/main/c/protocol/aeron_udp_protocol.c

@@ -37,6 +37,5 @@ int aeron_udp_protocol_sm_receiver_tag(aeron_status_message_header_t *sm, int64_
 
     *receiver_tag = 0;
 
-    return (int)sm->frame_header.frame_length - receiver_tag_offset;
+    return (int)((size_t)sm->frame_header.frame_length - receiver_tag_offset);
 }
-

aeron-driver/src/main/c/util/aeron_http_util.c

@@ -368,7 +368,8 @@ int aeron_http_retrieve(aeron_http_response_t **response, const char *url, int64
 
 int aeron_http_header_get(aeron_http_response_t *response, const char *header_name, char *line, size_t max_length)
 {
-    int line_result = 0, header_name_length = strlen(header_name);
+    int line_result = 0;
+    size_t header_name_length = strlen(header_name);
     size_t cursor = response->headers_offset;
 
     while (cursor < response->body_offset)

aeron-driver/src/main/c/util/aeron_parse_util.c

@@ -14,7 +14,6 @@
  * limitations under the License.
  */
 
-#include <memory.h>
 #include <stdlib.h>
 #include <errno.h>
 #include <limits.h>
@@ -454,7 +453,7 @@ int aeron_parse_get_line(char *str, size_t max_length, const char *buffer)
         if ('\n' == buffer[i])
         {
             str[i + 1] = '\0';
-            return i + 1;
+            return (int)(i + 1);
         }
     }
 

aeron-driver/src/main/c/util/aeron_properties_util.c

@@ -78,10 +78,10 @@ int aeron_properties_parse_line(
             if (':' == c || '=' == c)
             {
                 state->property_str[state->name_end] = '\0';
-                value_start = i + 1;
+                value_start = (int)i + 1;
 
                 /* trim back for whitespace after name */
-                for (int j = i - 1; j >= 0; j--)
+                for (size_t j = i - 1; j >= 0; j--)
                 {
                     if (' ' != line[j] && '\t' != line[j])
                     {

aeron-driver/src/test/c/media/aeron_udp_channel_transport_loss_test.cpp

@@ -56,10 +56,10 @@ void aeron_udp_channel_interceptor_loss_incoming_delegate(
     size_t length,
     struct sockaddr_storage *addr)
 {
-    delegate_recv_state_t *state = (delegate_recv_state_t *)interceptor_state;
+    auto *state = (delegate_recv_state_t *)interceptor_state;
 
     state->messages_received++;
-    state->bytes_received += length;
+    state->bytes_received += (int)length;
 }
 
 TEST_F(UdpChannelTransportLossTest, shouldDiscardAllPacketsWithRateOfOne)