Problem: Inconsistent size_t/int usage. Solution: types corrected.

src/mechanism_base.cpp

@@ -53,7 +53,7 @@ int zmq::mechanism_base_t::check_basic_command_structure (msg_t *msg_)
 }
 
 void zmq::mechanism_base_t::handle_error_reason (const char *error_reason,
-                                                 int error_reason_len)
+                                                 size_t error_reason_len)
 {
     if (error_reason_len == 3 && error_reason[1] == '0'
         && error_reason[2] == '0' && error_reason[0] >= '3'

src/mechanism_base.hpp

@@ -44,7 +44,7 @@ class mechanism_base_t : public mechanism_t
 
     int check_basic_command_structure (msg_t *msg_);
 
-    void handle_error_reason (const char *error_reason, int error_reason_len);
+    void handle_error_reason (const char *error_reason, size_t error_reason_len);
 };
 }
 

src/plain_server.cpp

@@ -112,7 +112,7 @@ int zmq::plain_server_t::process_hello (msg_t *msg_)
       return -1;
 
     const unsigned char *ptr = static_cast <unsigned char *> (msg_->data ());
-    int bytes_left = msg_->size ();
+    size_t bytes_left = msg_->size ();
 
     if (bytes_left < 6 || memcmp (ptr, "\x05HELLO", 6)) {
         session->get_socket ()->event_handshake_failed_protocol (
@@ -133,7 +133,7 @@ int zmq::plain_server_t::process_hello (msg_t *msg_)
     const uint8_t username_length = *ptr++;
     bytes_left -= 1;
 
-    if (bytes_left < (int)username_length) {
+    if (bytes_left < username_length) {
         //  PLAIN I: invalid PLAIN client, sent malformed username
         session->get_socket ()->event_handshake_failed_protocol (
           session->get_endpoint (), ZMQ_PROTOCOL_ERROR_ZMTP_MALFORMED_COMMAND_HELLO);
@@ -153,7 +153,7 @@ int zmq::plain_server_t::process_hello (msg_t *msg_)
 
     const uint8_t password_length = *ptr++;
     bytes_left -= 1;
-    if (bytes_left < (int)password_length) {
+    if (bytes_left < password_length) {
         //  PLAIN I: invalid PLAIN client, sent malformed password
         session->get_socket ()->event_handshake_failed_protocol (
           session->get_endpoint (), ZMQ_PROTOCOL_ERROR_ZMTP_MALFORMED_COMMAND_HELLO);