device: misc cleanup

use snprintf "just in case" where appropriate
consistently use unsigned for temp values
pass std::string by const ref rather than by value
add length check (which can't happen in practice) for memcpy

1 files changed, 7 insertions, 5 deletions

diff --git a/src/device/log.cpp b/src/device/log.cpp
index cbbcfc953..1707524fb 100644
--- a/src/device/log.cpp
+++ b/src/device/log.cpp
@@ -45,13 +45,13 @@ namespace hw {
       }
     }
 
-    void log_hexbuffer(std::string msg,  const char* buff, size_t len) {
+    void log_hexbuffer(const std::string &msg,  const char* buff, size_t len) {
       char logstr[1025];
       buffer_to_str(logstr, sizeof(logstr),  buff, len);
       MDEBUG(msg<< ": " << logstr);
     }
 
-    void log_message(std::string msg,  std::string info ) {
+    void log_message(const std::string &msg, const std::string &info ) {
       MDEBUG(msg << ": " << info);
     }
 
@@ -122,16 +122,18 @@ namespace hw {
 
     rct::keyV decrypt(const rct::keyV &keys) {
         rct::keyV x ;
+        x.reserve(keys.size());
         for (unsigned int j = 0; j<keys.size(); j++) {
             x.push_back(decrypt(keys[j]));
         }
         return x;
     }
 
-    static void check(std::string msg, std::string info, const char *h, const char *d, int len, bool crypted) {
+    static void check(const std::string &msg, const std::string &info, const char *h, const char *d, size_t len, bool crypted) {
       char dd[32];
       char logstr[128];
 
+      CHECK_AND_ASSERT_THROW_MES(len <= sizeof(dd), "invalid len");
       memmove(dd,d,len);
       if (crypted) {
         CHECK_AND_ASSERT_THROW_MES(len<=32, "encrypted data greater than 32");
@@ -149,11 +151,11 @@ namespace hw {
       }
     }
 
-    void check32(std::string msg, std::string info, const char *h, const char *d, bool crypted) {
+    void check32(const std::string &msg, const std::string &info, const char *h, const char *d, bool crypted) {
       check(msg, info, h, d, 32, crypted);
     }
 
-    void check8(std::string msg, std::string info, const char *h, const char *d, bool crypted) {
+    void check8(const std::string &msg, const std::string &info, const char *h, const char *d, bool crypted) {
       check(msg, info, h, d, 8, crypted);
     }
     #endif