Merge branch 'RumataEstor/odbc-sign-bug' into maint

* RumataEstor/odbc-sign-bug:
  add odbc:start/stop in testcase
  Fix signedness bug
  Fix odbcserver warnings
  Delete odbcserver unused variables
  Test to reveal odbcserver protocol bug

1 files changed, 28 insertions, 32 deletions

diff --git a/lib/odbc/c_src/odbcserver.c b/lib/odbc/c_src/odbcserver.c
index 84c201a656..f4b0a5d8d0 100644
--- a/lib/odbc/c_src/odbcserver.c
+++ b/lib/odbc/c_src/odbcserver.c
@@ -564,7 +564,6 @@ static db_result_msg db_connect(byte *args, db_state *state)
 /* Close the connection to the database. Returns an ok or error message. */
 static db_result_msg db_close_connection(db_state *state)
 {
-    int index;
     SQLRETURN result;
     diagnos diagnos;
 
@@ -613,11 +612,7 @@ static db_result_msg db_end_tran(byte compleationtype, db_state *state)
    erlang term into the message buffer of the returned message-struct. */
 static db_result_msg db_query(byte *sql, db_state *state)
 {
-    char *atom;
-    int num_of_rows, elements, update;
-    SQLSMALLINT num_of_columns;
     SQLRETURN result;
-    SQLINTEGER RowCountPtr;
     db_result_msg msg;
     diagnos diagnos;
     byte is_error[6];
@@ -701,12 +696,9 @@ static db_result_msg db_query(byte *sql, db_state *state)
    set. */
 static db_result_msg db_select_count(byte *sql, db_state *state)
 {
-    SQLSMALLINT num_of_columns, intresult;
+    SQLSMALLINT num_of_columns;
     SQLLEN num_of_rows;
-    SQLRETURN result;
     diagnos diagnos;
-    db_result_msg msg;
-    int index;
 
     if (associated_result_set(state)) {
 	clean_state(state);
@@ -792,6 +784,9 @@ static db_result_msg db_select(byte *args, db_state *state)
 	orientation = SQL_FETCH_NEXT;
 	offset = atoi(strtok((char *)(args + sizeof(byte)), ";"));
 	n =  atoi(strtok(NULL, ";"));
+	break;
+    default:
+	DO_EXIT(EXIT_PARAM_ARRAY);
     }
 
     msg = encode_empty_message();
@@ -942,7 +937,7 @@ static db_result_msg db_describe_table(byte *sql, db_state *state)
     SQLSMALLINT num_of_columns;
     SQLCHAR name[MAX_NAME];
     SQLSMALLINT name_len, sql_type, dec_digits, nullable;
-    SQLLEN size;
+    SQLULEN size;
     diagnos diagnos;
     int i;
     
@@ -1294,8 +1289,7 @@ static db_result_msg encode_column_name_list(SQLSMALLINT num_of_columns,
     db_result_msg msg;
     SQLCHAR name[MAX_NAME];
     SQLSMALLINT name_len, sql_type, dec_digits, nullable;
-    SQLLEN size; 
-    SQLRETURN result;
+    SQLULEN size;
 
     msg = encode_empty_message();
     
@@ -1357,9 +1351,8 @@ static db_result_msg encode_column_name_list(SQLSMALLINT num_of_columns,
 static db_result_msg encode_value_list(SQLSMALLINT num_of_columns,
 				       db_state *state)
 {
-    int i, msg_len;
+    int i;
     SQLRETURN result;
-    db_result_msg list_result;
     db_result_msg msg;
 
     msg = encode_empty_message();
@@ -1402,9 +1395,8 @@ static db_result_msg encode_value_list_scroll(SQLSMALLINT num_of_columns,
 					      SQLINTEGER OffSet, int N,
 					      db_state *state)
 {
-    int i, j,  msg_len;
+    int i, j;
     SQLRETURN result;
-    db_result_msg list_result;
     db_result_msg msg;
 
     msg = encode_empty_message();
@@ -1810,10 +1802,23 @@ static int read_exact(byte *buffer, int len) {
 #endif
 
 
+static size_t length_buffer_to_size(byte length_buffer[LENGTH_INDICATOR_SIZE])
+{
+  size_t size = 0, i;
+
+  for (i = 0; i < LENGTH_INDICATOR_SIZE; ++i) {
+    size <<= 8;
+    size |= (unsigned char)length_buffer[i];
+  }
+
+  return size;
+}
+
+
 /* Recieive (read) data from erlang on stdin */
 static byte * receive_erlang_port_msg(void)
 {
-    int i, len = 0;
+    size_t len;
     byte *buffer;
     byte lengthstr[LENGTH_INDICATOR_SIZE];
 
@@ -1822,10 +1827,8 @@ static byte * receive_erlang_port_msg(void)
     {
 	DO_EXIT(EXIT_STDIN_HEADER);
     }
-    for(i=0; i < LENGTH_INDICATOR_SIZE; i++) {
-	len <<= 8;
-	len |= lengthstr[i];
-    }
+
+    len = length_buffer_to_size(lengthstr);
     
     if (len <= 0 || len > 1024) {
 	DO_EXIT(EXIT_STDIN_HEADER);
@@ -1926,8 +1929,7 @@ static byte * receive_msg(int socket)
 #endif
 {
     byte lengthstr[LENGTH_INDICATOR_SIZE];
-    size_t msg_len = 0;
-    int i;
+    size_t msg_len;
     byte *buffer = NULL;
     
     if(!receive_msg_part(socket, lengthstr, LENGTH_INDICATOR_SIZE)) {
@@ -1935,10 +1937,7 @@ static byte * receive_msg(int socket)
 	DO_EXIT(EXIT_SOCKET_RECV_HEADER);
     }
     
-    for(i = 0; i < LENGTH_INDICATOR_SIZE; i++) {
-	msg_len <<= 8;
-	msg_len |= lengthstr[i];
-    }
+    msg_len = length_buffer_to_size(lengthstr);
     
     buffer = (byte *)safe_malloc(msg_len);
 
@@ -2200,8 +2199,7 @@ static void init_driver(int erl_auto_commit_mode, int erl_trace_driver,
 static void init_param_column(param_array *params, byte *buffer, int *index,
 			      int num_param_values, db_state* state)
 {
-    int size, erl_type;
-    long user_type, precision, scale, length, dummy;
+    long user_type, precision, scale, length;
     long in_or_out;
     
     ei_decode_long(buffer, index, &user_type);
@@ -2514,8 +2512,7 @@ static param_array * bind_parameter_arrays(byte *buffer, int *index,
 					   int cols, int num_param_values,
 					   db_state *state)
 {
-    int i, j, k, size, erl_type;
-    db_result_msg msg;
+    int i, j, size, erl_type;
     long dummy;
     void *Values;
     param_array *params;
@@ -2601,7 +2598,6 @@ static db_column retrive_binary_data(db_column column, int column_nr,
 				     db_state *state)
 { 
     char *outputptr;
-    char *sqlState;
     int blocklen, outputlen, result;
     diagnos diagnos;