Fix #73 Wrong exception thrown by Database constructor

 - switched from sqlite3_errmsg() to sqlite3_errstr() where applicable

include/SQLiteCpp/Database.h

@@ -378,7 +378,7 @@ class Database
     {
         if (SQLITE_OK != aRet)
         {
-            throw SQLite::Exception(sqlite3_errmsg(mpSQLite));
+            throw SQLite::Exception(sqlite3_errstr(aRet));
         }
     }
 

include/SQLiteCpp/Statement.h

@@ -457,7 +457,7 @@ class Statement
     {
         if (SQLITE_OK != aRet)
         {
-            throw SQLite::Exception(sqlite3_errmsg(mStmtPtr));
+            throw SQLite::Exception(sqlite3_errstr(aRet));
         }
     }
 

src/Backup.cpp

@@ -85,11 +85,7 @@ int Backup::executeStep(const int aNumPage /* = -1 */)
     if (SQLITE_OK != res && SQLITE_DONE != res &&
             SQLITE_BUSY != res && SQLITE_LOCKED != res)
     {
-        std::string strerr("Backup executeStep error");
-#if SQLITE_VERSION_NUMBER >= 3007015  // SQLite v3.7.15 is the first version with sqlite3_errstr() interface
-        strerr += "with error message ";
-        strerr += sqlite3_errstr(res);
-#endif
+        std::string strerr = sqlite3_errstr(res);
         throw SQLite::Exception(strerr);
     }
     return res;

src/Database.cpp

@@ -36,7 +36,7 @@ Database::Database(const char* apFilename,
     const int ret = sqlite3_open_v2(apFilename, &mpSQLite, aFlags, apVfs);
     if (SQLITE_OK != ret)
     {
-        std::string strerr = sqlite3_errmsg(mpSQLite);
+        std::string strerr = sqlite3_errstr(ret);
         sqlite3_close(mpSQLite); // close is required even in case of error on opening
         throw SQLite::Exception(strerr);
     }
@@ -58,7 +58,7 @@ Database::Database(const std::string& aFilename,
     const int ret = sqlite3_open_v2(aFilename.c_str(), &mpSQLite, aFlags, aVfs.empty() ? NULL : aVfs.c_str());
     if (SQLITE_OK != ret)
     {
-        std::string strerr = sqlite3_errmsg(mpSQLite);
+        std::string strerr = sqlite3_errstr(ret);
         sqlite3_close(mpSQLite); // close is required even in case of error on opening
         throw SQLite::Exception(strerr);
     }
@@ -85,7 +85,7 @@ Database::~Database() noexcept // nothrow
 /**
  * @brief Set a busy handler that sleeps for a specified amount of time when a table is locked.
  *
- *  This is usefull in multithreaded program to handle case where a table is locked for writting by a thread.
+ *  This is useful in multithreaded program to handle case where a table is locked for writting by a thread.
  * Any other thread cannot access the table and will receive a SQLITE_BUSY error:
  * setting a timeout will wait and retry up to the time specified before returning this SQLITE_BUSY error.
  *  Reading the value of timeout for current connection can be done with SQL query "PRAGMA busy_timeout;".

src/Statement.cpp

@@ -195,7 +195,7 @@ bool Statement::executeStep()
         {
             mbOk = false;
             mbDone = false;
-            throw SQLite::Exception(sqlite3_errmsg(mStmtPtr));
+            throw SQLite::Exception(sqlite3_errstr(ret));
         }
     }
     else
@@ -227,7 +227,7 @@ int Statement::exec()
         {
             mbOk = false;
             mbDone = false;
-            throw SQLite::Exception(sqlite3_errmsg(mStmtPtr));
+            throw SQLite::Exception(sqlite3_errstr(ret));
         }
     }
     else
@@ -317,7 +317,7 @@ Statement::Ptr::Ptr(sqlite3* apSQLite, std::string& aQuery) :
     const int ret = sqlite3_prepare_v2(apSQLite, aQuery.c_str(), static_cast<int>(aQuery.size()), &mpStmt, NULL);
     if (SQLITE_OK != ret)
     {
-        throw SQLite::Exception(sqlite3_errmsg(mpSQLite));
+        throw SQLite::Exception(sqlite3_errstr(ret));
     }
     // Initialize the reference counter of the sqlite3_stmt :
     // used to share the mStmtPtr between Statement and Column objects;