2 files changed, 22 insertions, 11 deletions

diff --git a/apps/SoilMoistureIo.cpp b/apps/SoilMoistureIo.cpp
index 24618ff..983427c 100644
--- a/apps/SoilMoistureIo.cpp
+++ b/apps/SoilMoistureIo.cpp
@@ -108,7 +108,10 @@ SqlSampleOutputStream::SqlSampleOutputStream(ostream &stream, vector<string> fie
 }
 
 void SqlSampleOutputStream::write(Sample values) {
-    stringstream fs, vs;
+    string fs, vs;
+
+    fs.reserve(1024);
+    vs.reserve(1024);
 
     if (filterFields) {
         auto i = fields.begin();
@@ -116,21 +119,21 @@ void SqlSampleOutputStream::write(Sample values) {
         while (i != fields.end()) {
             auto field = *i;
 
-            fs << field;
+            fs += field;
 
             auto value = values.find(field);
 
             if (value != values.end()) {
-                vs << "'" << value->second << "'";
+                vs += "'" + value->second + "'";
             } else {
-                vs << "NULL";
+                vs + "NULL";
             }
 
             i++;
 
             if (i != fields.end()) {
-                fs << ",";
-                vs << ",";
+                fs += ",";
+                vs += ",";
             }
         }
     } else {
@@ -138,17 +141,17 @@ void SqlSampleOutputStream::write(Sample values) {
         while (i != values.end()) {
             auto v = *i++;
 
-            fs << v.first;
-            vs << "'" <<  v.second << "'";
+            fs += v.first;
+            vs += "'" +  v.second + "'";
 
             if (i != values.end()) {
-                fs << ",";
-                vs << ",";
+                fs += ",";
+                vs += ",";
             }
         }
     }
 
-    stream << "INSERT INTO (" << fs << ") VALUES(" << vs << ")" << endl;
+    stream << "INSERT INTO (" << fs << ") VALUES(" << vs << ");" << endl;
 }
 
 void CsvParser::process(mutable_buffers_1 buffer) {
diff --git a/apps/sample-convert.cpp b/apps/sample-convert.cpp
index 370059c..23a04ff 100644
--- a/apps/sample-convert.cpp
+++ b/apps/sample-convert.cpp
@@ -37,6 +37,10 @@ public:
             inputStream = &cin;
         } else {
             inputStream = new ifstream(inputFile);
+            if (inputStream->fail()) {
+                cerr << "Unable to open input file " << inputFile << endl;
+                return EXIT_FAILURE;
+            }
         }
 
         ostream *outputStream;
@@ -44,6 +48,10 @@ public:
             outputStream = &cout;
         } else {
             outputStream = new ofstream(outputFile);
+            if (outputStream->fail()) {
+                cerr << "Unable to open output file " << outputFile << endl;
+                return EXIT_FAILURE;
+            }
         }
 
         if (outputFormat == "plain") {