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-rw-r--r--lib/odbc/c_src/Makefile25
-rw-r--r--lib/odbc/c_src/Makefile.in142
-rw-r--r--lib/odbc/c_src/odbcserver.c2502
-rw-r--r--lib/odbc/c_src/odbcserver.h193
4 files changed, 2862 insertions, 0 deletions
diff --git a/lib/odbc/c_src/Makefile b/lib/odbc/c_src/Makefile
new file mode 100644
index 0000000000..acc79e33d5
--- /dev/null
+++ b/lib/odbc/c_src/Makefile
@@ -0,0 +1,25 @@
+#
+# %CopyrightBegin%
+#
+# Copyright Ericsson AB 2005-2009. All Rights Reserved.
+#
+# The contents of this file are subject to the Erlang Public License,
+# Version 1.1, (the "License"); you may not use this file except in
+# compliance with the License. You should have received a copy of the
+# Erlang Public License along with this software. If not, it can be
+# retrieved online at http://www.erlang.org/.
+#
+# Software distributed under the License is distributed on an "AS IS"
+# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+# the License for the specific language governing rights and limitations
+# under the License.
+#
+# %CopyrightEnd%
+#
+
+#
+# Invoke with GNU make or clearmake -C gnu.
+#
+
+include $(ERL_TOP)/make/run_make.mk
+
diff --git a/lib/odbc/c_src/Makefile.in b/lib/odbc/c_src/Makefile.in
new file mode 100644
index 0000000000..6a9a174417
--- /dev/null
+++ b/lib/odbc/c_src/Makefile.in
@@ -0,0 +1,142 @@
+#
+# %CopyrightBegin%
+#
+# Copyright Ericsson AB 1999-2009. All Rights Reserved.
+#
+# The contents of this file are subject to the Erlang Public License,
+# Version 1.1, (the "License"); you may not use this file except in
+# compliance with the License. You should have received a copy of the
+# Erlang Public License along with this software. If not, it can be
+# retrieved online at http://www.erlang.org/.
+#
+# Software distributed under the License is distributed on an "AS IS"
+# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+# the License for the specific language governing rights and limitations
+# under the License.
+#
+# %CopyrightEnd%
+#
+
+#
+include $(ERL_TOP)/make/target.mk
+include $(ERL_TOP)/make/$(TARGET)/otp.mk
+
+ifeq ($(TYPE),debug)
+TYPEMARKER = .debug
+TYPEFLAGS = -g
+else
+TYPEMARKER =
+TYPEFLAGS =
+endif
+
+WIN_BIN_DIR = ../priv/bin
+BIN_DIR = ../priv/bin/$(TARGET)
+OBJ_DIR = ../priv/obj/$(TARGET)
+INCLUDE_DIR= ../include
+
+.PHONY: create_dirs
+
+# ----------------------------------------------------
+# Application version
+# ----------------------------------------------------
+include ../vsn.mk
+VSN=$(ODBC_VSN)
+
+# ----------------------------------------------------
+# Release directory specification
+# ----------------------------------------------------
+RELSYSDIR = $(RELEASE_PATH)/lib/odbc-$(VSN)
+
+# ----------------------------------------------------
+# Target Specs
+# ----------------------------------------------------
+EI_ROOT = $(ERL_TOP)/lib/erl_interface
+EI_INCLUDE = -I$(EI_ROOT)/include
+ifeq ($(findstring win32,$(TARGET)),win32)
+EI_LIB = -lerl_interface_md -lei_md
+ENTRY_OBJ=$(ERL_TOP)/erts/obj/$(TARGET)/port_entry.o
+PORT_ENTRY_POINT=erl_port_entry
+ENTRY_LDFLAGS=-entry:$(PORT_ENTRY_POINT)
+WIN32_TARGET = $(WIN_BIN_DIR)/odbcserver.exe
+EXE_TARGET = $(WIN32_TARGET)
+else
+EI_LIB = -lerl_interface -lei
+UNIX_TARGET = $(BIN_DIR)/odbcserver
+EXE_TARGET = $(UNIX_TARGET)
+endif
+
+C_FILES = odbcserver.c
+H_FILES = odbcserver.h
+
+# ----------------------------------------------------
+# ODBC locations and include options from configure
+# ----------------------------------------------------
+ODBC_LIB = @ODBC_LIB@
+ODBC_INCLUDE = @ODBC_INCLUDE@
+
+# ----------------------------------------------------
+# FLAGS
+# ----------------------------------------------------
+CC = @CC@
+CFLAGS = $(TYPEFLAGS) @CFLAGS@
+EI_LDFLAGS = -L$(EI_ROOT)/obj$(TYPEMARKER)/$(TARGET)
+LD = @DED_LD@
+LDFLAGS = $(ODBC_LIB) $(EI_LDFLAGS)
+LIBS = @LIBS@ $(EI_LIB)
+INCLUDES = -I. $(ODBC_INCLUDE) $(EI_INCLUDE)
+TARGET_FLAGS = @TARGET_FLAGS@
+
+# ----------------------------------------------------
+# Targets
+# ----------------------------------------------------
+
+ifdef EXE_TARGET
+opt debug: create_dirs $(EXE_TARGET)
+else
+opt debug:
+endif
+
+clean:
+ rm -f core *~
+ rm -f $(OBJ_DIR)/*
+docs:
+
+# ----------------------------------------------------
+# Special Build Targets
+# ----------------------------------------------------
+
+ifdef UNIX_TARGET
+$(UNIX_TARGET): $(BIN_DIR) $(OBJ_DIR)/odbcserver.o
+ $(CC) $(CFLAGS) -o $@ $(OBJ_DIR)/odbcserver.o $(LDFLAGS) $(LIBS)
+endif
+
+ifdef WIN32_TARGET
+$(WIN32_TARGET): $(BIN_DIR) $(OBJ_DIR)/odbcserver.o
+ $(LD) $(LDFLAGS) -o $@ $(OBJ_DIR)/odbcserver.o $(ENTRY_OBJ) \
+ $(LIBS) $(ENTRY_LDFLAGS)
+endif
+
+$(OBJ_DIR)/odbcserver.o: $(OBJ_DIR) odbcserver.c
+ $(CC) $(CFLAGS) $(INCLUDES) $(TARGET_FLAGS) -o $@ -c odbcserver.c
+
+create_dirs:
+ $(INSTALL_DIR) $(OBJ_DIR)
+ $(INSTALL_DIR) $(BIN_DIR)
+
+# ----------------------------------------------------
+# Release Target
+# ----------------------------------------------------
+
+include $(ERL_TOP)/make/otp_release_targets.mk
+
+release_spec: opt
+ifdef EXE_TARGET
+ $(INSTALL_DIR) $(RELSYSDIR)/c_src
+ $(INSTALL_DATA) $(C_FILES) $(H_FILES) $(RELSYSDIR)/c_src
+ $(INSTALL_DIR) $(RELSYSDIR)/priv
+ $(INSTALL_DIR) $(RELSYSDIR)/priv/bin
+ $(INSTALL_DIR) $(RELSYSDIR)/priv/obj
+ $(INSTALL_PROGRAM) $(EXE_TARGET) $(RELSYSDIR)/priv/bin
+endif
+
+release_docs_spec:
diff --git a/lib/odbc/c_src/odbcserver.c b/lib/odbc/c_src/odbcserver.c
new file mode 100644
index 0000000000..63177121bc
--- /dev/null
+++ b/lib/odbc/c_src/odbcserver.c
@@ -0,0 +1,2502 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 1999-2009. All Rights Reserved.
+ *
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * %CopyrightEnd%
+ *
+
+ */
+
+/*
+ DESCRIPTION: Erlang ODBC (Open Database Connectivity) application. An
+ erlang control process sends request to the c-process that queries the
+ database using the Microsoft ODBC API. The c-process is implemented
+ using two threads the supervisor thread and the database handler thread.
+ If the database thread should hang erlang can close the c-process down
+ by sendig a shutdown request to the supervisor thread.
+
+ Erlang will start this c-process as a port-program and send information
+ regarding inet-port nummbers through the erlang-port.
+ After that c-process will communicate via sockets with erlang. The
+ reason for this is that some odbc-drivers do unexpected things with
+ stdin/stdout messing up the erlang-port communication.
+
+
+ Command protocol between Erlang and C
+ -------------------------------------
+ The requests from Erlang to C are byte lists composed as [CommandByte,
+ Bytes, StringTerminator]
+
+ CommandByte - constants between 0 and 255
+ identifing the request defined in odbc_internal.hrl and odbcserver.h
+
+ Bytes - How to interpret this sequence of bytes depends on the
+ CommandByte.
+
+ StringTerminator - 0
+
+ When the C-program processed the request from erlang it will use the
+ ei-interface to create an Erlang term. This term will be sent the
+ erlang via a socket. The Erlang control process, will forward
+ it to the client that does binary_to_term before returning the result
+ to the client program.
+
+ Here follows a list of [CommandByte, Bytes] that describes the possible
+ values. Note the Bytes part may be empty as in the case
+ of ?CLOSE_CONNECTION and if integer values may be larger than 255
+ they are converted to string values.
+
+ [?OPEN_CONNECTION, C_AutoCommitMode, C_TraceDriver, C_SrollableCursors,
+ C_TupelRow, ConnectionStr]
+ [?CLOSE_CONNECTION]
+ [?COMMIT_TRANSACTION, CommitMode]
+ [?QUERY, SQLQuery]
+ [?SELECT_COUNT, SQLQuery]
+ [?SELECT, ?SELECT_FIRST]
+ [?SELECT, ?SELECT_LAST]
+ [?SELECT, ?SELECT_NEXT]
+ [?SELECT, ?SELECT_PREV]
+ [?SELECT, CursorRelation, integer_to_list(OffSet), ";",
+ integer_to_list(N), ";"]
+ [?PARAM_QUERY, Binary]
+
+ C_AutoCommitMode - ?ON | ?OFF
+ C_TraceDriver - ?ON | ?OFF
+ C_SrollableCursors - ?ON | ?OFF
+ C_TupelRow - - ?ON | ?OFF
+ ConnectionStr - String
+ CommitMode - ?COMMIT | ?ROLLBACK
+ SQLQuery - String
+ CursorRelation - ?SELECT_RELATIVE | ?SELECT_ABSOLUTE | ?SELECT_N_NEXT
+ OffSet - integer
+ N - integer
+ Binary - binary encodede tuple of {SQLQuery, NoRows, Parameters}
+ NoRows - integer
+ Parameters - [{Datatype, InOrOut, Value}]
+ InOrOut = [ERL_ODBC_IN | ERL_ODBC_OUT | ERL_ODBC_INOUT]
+ Datatype - USER_INT | USER_SMALL_INT | {USER_DECIMAL, Precision, Scale} |
+ {USER_NMERIC, Precision, Scale} | {USER_CHAR, Max} | {USER_VARCHAR, Max} |
+ {USER_FLOAT, Precision} | USER_REAL | USER_DOUBLE
+ Scale - integer
+ Precision - integer
+ Max - integer
+*/
+
+/* ----------------------------- INCLUDES ------------------------------*/
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#ifdef UNIX
+#include <unistd.h>
+#endif
+
+#if defined WIN32
+#include <winsock2.h>
+/* #include <ws2tcpip.h > When we can support a newer c-compiler*/
+#include <windows.h>
+#include <fcntl.h>
+#include <sql.h>
+#include <sqlext.h>
+#else
+#include "sql.h"
+#include "sqlext.h"
+#include <pthread.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/uio.h>
+#include <netdb.h>
+#endif
+
+#include <limits.h>
+
+#include "ei.h"
+#include "odbcserver.h"
+
+/* ---------------- Main functions ---------------------------------------*/
+static void spawn_sup(const char *port);
+#ifdef WIN32
+DWORD WINAPI database_handler(const char *port);
+#else
+void database_handler(const char *port);
+#endif
+static db_result_msg handle_db_request(byte *reqstring, db_state *state);
+static void supervise(const char *port);
+/* ----------------- ODBC functions --------------------------------------*/
+
+static db_result_msg db_connect(byte *connStrIn, db_state *state);
+static db_result_msg db_close_connection(db_state *state);
+static db_result_msg db_end_tran(byte compleationtype, db_state *state);
+static db_result_msg db_query(byte *sql, db_state *state);
+static db_result_msg db_select_count(byte *sql,db_state *state);
+static db_result_msg db_select(byte *args, db_state *state);
+static db_result_msg db_param_query(byte *buffer, db_state *state);
+static db_result_msg db_describe_table(byte *sql, db_state *state);
+
+/* ------------- Encode/decode functions -------- ------------------------*/
+
+static db_result_msg encode_empty_message(void);
+static db_result_msg encode_error_message(char *reason);
+static db_result_msg encode_atom_message(char *atom);
+static db_result_msg encode_result(db_state *state);
+static db_result_msg encode_result_set(SQLSMALLINT num_of_columns,
+ db_state *state);
+static db_result_msg encode_out_params(db_state *state,
+ int cols,
+ param_array *params,
+ int num_param_values);
+static db_result_msg encode_column_name_list(SQLSMALLINT num_of_columns,
+ db_state *state);
+static db_result_msg encode_value_list(SQLSMALLINT num_of_columns,
+ db_state *state);
+static db_result_msg encode_value_list_scroll(SQLSMALLINT num_of_columns,
+ SQLSMALLINT Orientation,
+ SQLINTEGER OffSet, int N,
+ db_state *state);
+static db_result_msg encode_row_count(SQLINTEGER num_of_rows,
+ db_state *state);
+static void encode_column_dyn(db_column column, int column_nr,
+ db_state *state);
+static void encode_data_type(SQLINTEGER sql_type, SQLINTEGER size,
+ SQLSMALLINT decimal_digits, db_state *state);
+static Boolean decode_params(byte *buffer, int *index, param_array **params,
+ int i, int j);
+
+/*------------- Erlang port communication functions ----------------------*/
+
+static int read_exact(byte *buf, int len);
+static byte * receive_erlang_port_msg(void);
+
+/* ------------- Socket communication functions --------------------------*/
+
+#ifdef WIN32
+static SOCKET connect_to_erlang(const char *port);
+static void send_msg(db_result_msg *msg, SOCKET socket);
+static byte *receive_msg(SOCKET socket);
+static Boolean receive_msg_part(SOCKET socket,
+ byte * buffer, size_t msg_len);
+static Boolean send_msg_part(SOCKET socket, byte * buffer, size_t msg_len);
+static void close_socket(SOCKET socket);
+static void init_winsock(void);
+#elif defined(UNIX)
+static int connect_to_erlang(const char *port);
+static void send_msg(db_result_msg *msg, int socket);
+static byte *receive_msg(int socket);
+static Boolean receive_msg_part(int socket, byte * buffer, size_t msg_len);
+static Boolean send_msg_part(int socket, byte * buffer, size_t msg_len);
+static void close_socket(int socket);
+#endif
+static void clean_socket_lib(void);
+
+/*------------- Memory handling funtions --------------------------------*/
+
+static void * safe_malloc(int size);
+static void * safe_realloc(void * ptr, int size);
+static db_column * alloc_column_buffer(int n);
+static void free_column_buffer(db_column **columns, int n);
+static void free_params(param_array **params, int cols);
+static void clean_state(db_state *state);
+
+/* ------------- Init/map/bind/retrive functions -------------------------*/
+
+static void init_driver(int erl_auto_commit_mode, int erl_trace_driver,
+ db_state *state);
+static void init_param_column(param_array *params, byte *buffer, int *index,
+ int num_param_values, db_state* state);
+
+static void init_param_statement(int cols,
+ int num_param_values,
+ db_state *state,
+ param_status *status);
+
+static void map_dec_num_2_c_column(col_type *type, int precision,
+ int scale);
+static db_result_msg map_sql_2_c_column(db_column* column);
+
+
+static param_array * bind_parameter_arrays(byte *buffer, int *index,
+ int cols,
+ int num_param_values,
+ db_state *state);
+static void * retrive_param_values(param_array *Param);
+
+static db_column retrive_binary_data(db_column column, int column_nr,
+ db_state *state);
+static db_result_msg retrive_scrollable_cursor_support_info(db_state
+ *state);
+static int num_out_params(int num_of_params, param_array* params);
+/* ------------- Error handling functions --------------------------------*/
+
+static diagnos get_diagnos(SQLSMALLINT handleType, SQLHANDLE handle);
+
+/* ------------- Boolean functions ---------------------------------------*/
+
+static db_result_msg more_result_sets(db_state *state);
+static Boolean sql_success(SQLRETURN result);
+static void str_tolower(char *str, int len);
+
+/* ----------------------------- CODE ------------------------------------*/
+
+#if defined(WIN32)
+# define DO_EXIT(code) do { ExitProcess((code)); exit((code));} while (0)
+/* exit() called only to avoid a warning */
+#else
+# define DO_EXIT(code) exit((code))
+#endif
+
+/* ----------------- Main functions --------------------------------------*/
+
+int main(void)
+{
+ byte *msg = NULL;
+ char *temp = NULL, *supervisor_port = NULL, *odbc_port = NULL;
+ size_t length;
+#ifdef WIN32
+ _setmode(_fileno( stdin), _O_BINARY);
+#endif
+
+ msg = receive_erlang_port_msg();
+
+ temp = strtok(msg, ";");
+ length = strlen(temp);
+ supervisor_port = safe_malloc(length + 1);
+ strcpy(supervisor_port, temp);
+
+ temp = strtok(NULL, ";");
+ length = strlen(temp);
+ odbc_port = safe_malloc(length + 1);
+ strcpy(odbc_port, temp);
+
+ free(msg);
+
+ spawn_sup(supervisor_port);
+ database_handler(odbc_port);
+
+ return 0;
+}
+
+#ifdef WIN32
+static void spawn_sup(const char *port)
+{
+ DWORD threadId;
+ (HANDLE)_beginthreadex(NULL, 0, supervise, port, 0, &threadId);
+}
+#elif defined(UNIX)
+static void spawn_sup(const char *port)
+{
+ pthread_t thread;
+ int result;
+
+ result = pthread_create(&thread, NULL,
+ (void *(*)(void *))supervise,
+ (void *)port);
+ if (result != 0)
+ DO_EXIT(EXIT_THREAD);
+}
+#endif
+
+void supervise(const char *port) {
+ byte *msg = NULL;
+ int reason;
+#ifdef WIN32
+ SOCKET socket;
+ init_winsock();
+#elif defined(UNIX)
+ int socket;
+#endif
+
+ socket = connect_to_erlang(port);
+ msg = receive_msg(socket);
+
+ if(msg[0] == SHUTDOWN) {
+ reason = EXIT_SUCCESS;
+ } else {
+ reason = EXIT_FAILURE; /* Should not happen */
+ }
+
+ free(msg);
+ close_socket(socket);
+ clean_socket_lib();
+ DO_EXIT(reason);
+}
+
+#ifdef WIN32
+DWORD WINAPI database_handler(const char *port)
+#else
+ void database_handler(const char *port)
+#endif
+{
+ db_result_msg msg;
+ byte *request_buffer = NULL;
+ db_state state =
+ {NULL, NULL, NULL, NULL, 0, {NULL, 0, 0},
+ FALSE, FALSE, FALSE, FALSE, FALSE, FALSE};
+ byte request_id;
+#ifdef WIN32
+ SOCKET socket;
+ init_winsock();
+#elif defined(UNIX)
+ int socket;
+#endif
+
+ socket = connect_to_erlang(port);
+
+ do {
+ request_buffer = receive_msg(socket);
+
+ request_id = request_buffer[0];
+ msg = handle_db_request(request_buffer, &state);
+
+ send_msg(&msg, socket); /* Send answer to erlang */
+
+ if (msg.dyn_alloc) {
+ ei_x_free(&(state.dynamic_buffer));
+ } else {
+ free(msg.buffer);
+ msg.buffer = NULL;
+ }
+
+ free(request_buffer);
+ request_buffer = NULL;
+
+ } while(request_id != CLOSE_CONNECTION);
+
+ shutdown(socket, 2);
+ close_socket(socket);
+ clean_socket_lib();
+ DO_EXIT(EXIT_SUCCESS);
+}
+
+/* Description: Calls the appropriate function to handle the database
+ request recived from the erlang-process. Returns a message to send back
+ to erlang. */
+static db_result_msg handle_db_request(byte *reqstring, db_state *state)
+{
+ byte *args;
+ byte request_id;
+
+ /* First byte is an index that identifies the requested command the
+ rest is the argument string. */
+ request_id = reqstring[0];
+ args = reqstring + sizeof(byte);
+
+ switch(request_id) {
+ case OPEN_CONNECTION:
+ return db_connect(args, state);
+ case CLOSE_CONNECTION:
+ return db_close_connection(state);
+ case COMMIT_TRANSACTION:
+ if(args[0] == COMMIT) {
+ return db_end_tran((byte)SQL_COMMIT, state);
+ } else { /* args[0] == ROLLBACK */
+ return db_end_tran((byte)SQL_ROLLBACK, state);
+ }
+ case QUERY:
+ return db_query(args, state);
+ case SELECT_COUNT:
+ return db_select_count(args, state);
+ case SELECT:
+ return db_select(args, state);
+ case PARAM_QUERY:
+ return db_param_query(args, state);
+ case DESCRIBE:
+ return db_describe_table(args, state);
+ default:
+ DO_EXIT(EXIT_FAILURE); /* Should not happen */
+ }
+}
+
+/* ----------------- ODBC-functions ----------------------------------*/
+
+/* Description: Tries to open a connection to the database using
+ <connStrIn>, returns a message indicating the outcome. */
+static db_result_msg db_connect(byte *args, db_state *state)
+{
+ SQLCHAR connStrOut[MAX_CONN_STR_OUT + 1] = {0};
+ SQLRETURN result;
+ SQLSMALLINT stringlength2ptr = 0, connlen;
+ db_result_msg msg;
+ diagnos diagnos;
+ byte *connStrIn;
+ int erl_auto_commit_mode, erl_trace_driver,
+ use_srollable_cursors, tuple_row_state;
+
+ erl_auto_commit_mode = args[0];
+ erl_trace_driver = args[1];
+ use_srollable_cursors = args[2];
+ tuple_row_state = args[3];
+ connStrIn = args + 4 * sizeof(byte);
+
+ if(tuple_row_state == ON) {
+ tuple_row(state) = TRUE;
+ } else {
+ tuple_row(state) = FALSE;
+ }
+
+ if(use_srollable_cursors == ON) {
+ use_srollable_cursors(state) = TRUE;
+ } else {
+ use_srollable_cursors(state) = FALSE;
+ }
+
+ init_driver(erl_auto_commit_mode, erl_trace_driver, state);
+
+ connlen = (SQLSMALLINT)strlen((const char*)connStrIn);
+ result = SQLDriverConnect(connection_handle(state), NULL,
+ (SQLCHAR *)connStrIn,
+ connlen,
+ connStrOut, (SQLSMALLINT)MAX_CONN_STR_OUT,
+ &stringlength2ptr, SQL_DRIVER_NOPROMPT);
+
+ if (!sql_success(result)) {
+ diagnos = get_diagnos(SQL_HANDLE_STMT, statement_handle(state));
+ strcat((char *)diagnos.error_msg,
+ " Connection to database failed.");
+ msg = encode_error_message(diagnos.error_msg);
+
+ if(!sql_success(SQLFreeHandle(SQL_HANDLE_DBC,
+ connection_handle(state))))
+ DO_EXIT(EXIT_FREE);
+ if(!sql_success(SQLFreeHandle(SQL_HANDLE_ENV,
+ environment_handle(state))))
+ DO_EXIT(EXIT_FREE);
+
+ return msg;
+ }
+
+ msg = retrive_scrollable_cursor_support_info(state);
+
+ return msg;
+}
+
+/* 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;
+
+ if (associated_result_set(state)) {
+ clean_state(state);
+ }
+
+ result = SQLDisconnect(connection_handle(state));
+
+ if (!sql_success(result)) {
+ diagnos = get_diagnos(SQL_HANDLE_DBC, connection_handle(state));
+ return encode_error_message(diagnos.error_msg);
+ }
+
+ if(!sql_success(SQLFreeHandle(SQL_HANDLE_DBC,
+ connection_handle(state))))
+ DO_EXIT(EXIT_FREE);
+ if(!sql_success(SQLFreeHandle(SQL_HANDLE_ENV,
+ environment_handle(state))))
+ DO_EXIT(EXIT_FREE);
+
+ return encode_atom_message("ok");
+}
+
+
+/* Description: Requests a commit or rollback operation for all active
+ operations on all statements associated with the connection
+ handle <connection_handle(state)>. Returns an ok or error message. */
+static db_result_msg db_end_tran(byte compleationtype, db_state *state)
+{
+ SQLRETURN result;
+ diagnos diagnos;
+
+ result = SQLEndTran(SQL_HANDLE_DBC, connection_handle(state),
+ (SQLSMALLINT)compleationtype);
+
+ if (!sql_success(result)) {
+ diagnos = get_diagnos(SQL_HANDLE_DBC, connection_handle(state));
+ return encode_error_message(diagnos.error_msg);
+ } else {
+ return encode_atom_message("ok");
+ }
+}
+
+/* Description: Executes an sql query and encodes the result set as an
+ 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];
+
+ if (associated_result_set(state)) {
+ clean_state(state);
+ }
+ associated_result_set(state) = FALSE;
+
+ msg = encode_empty_message();
+
+ if(!sql_success(SQLAllocHandle(SQL_HANDLE_STMT,
+ connection_handle(state),
+ &statement_handle(state))))
+ DO_EXIT(EXIT_ALLOC);
+
+ result = SQLExecDirect(statement_handle(state), sql, SQL_NTS);
+
+ /* SQL_SUCCESS_WITH_INFO at this point may indicate an error in user input. */
+ if (result != SQL_SUCCESS && result != SQL_NO_DATA_FOUND) {
+ diagnos = get_diagnos(SQL_HANDLE_STMT, statement_handle(state));
+ if(strcmp((char *)diagnos.sqlState, INFO) == 0) {
+ is_error[0] = 0;
+ strncat((char *)is_error, (char *)diagnos.error_msg,
+ 5);
+ str_tolower((char *)&is_error, 5);
+ /* The ODBC error handling could have been more
+ predictable but alas ... we try to make the best of
+ it as we want a nice and clean Erlang API */
+ if((strcmp((char *)is_error, "error") == 0))
+ {
+ msg = encode_error_message((char *)diagnos.error_msg);
+ clean_state(state);
+ return msg;
+ }
+ } else {
+ msg = encode_error_message((char *)diagnos.error_msg);
+ clean_state(state);
+ return msg;
+ }
+ }
+
+ ei_x_new_with_version(&dynamic_buffer(state));
+
+ /* OTP-5759, fails when 0 rows deleted */
+ if (result == SQL_NO_DATA_FOUND) {
+ msg = encode_result(state);
+ } else {
+ /* Handle multiple result sets */
+ do {
+ ei_x_encode_list_header(&dynamic_buffer(state), 1);
+ msg = encode_result(state);
+ /* We don't want to continue if an error occured */
+ if (msg.length != 0) {
+ break;
+ }
+ msg = more_result_sets(state);
+ /* We don't want to continue if an error occured */
+ if (msg.length != 0) {
+ break;
+ }
+ } while (exists_more_result_sets(state));
+
+ ei_x_encode_empty_list(&dynamic_buffer(state));
+ }
+
+ clean_state(state);
+
+ if (msg.length != 0) { /* An error has occurred */
+ ei_x_free(&(dynamic_buffer(state)));
+ return msg;
+ } else {
+ msg.buffer = dynamic_buffer(state).buff;
+ msg.length = dynamic_buffer(state).index;
+ msg.dyn_alloc = TRUE;
+ return msg;
+ }
+}
+
+/* Description: Executes an sql query. Returns number of rows in the result
+ set. */
+static db_result_msg db_select_count(byte *sql, db_state *state)
+{
+ SQLSMALLINT num_of_columns, intresult;
+ SQLLEN num_of_rows;
+ SQLRETURN result;
+ diagnos diagnos;
+ db_result_msg msg;
+ int index;
+
+ if (associated_result_set(state)) {
+ clean_state(state);
+ }
+ associated_result_set(state) = TRUE;
+
+ if(!sql_success(SQLAllocHandle(SQL_HANDLE_STMT,
+ connection_handle(state),
+ &statement_handle(state))))
+ DO_EXIT(EXIT_ALLOC);
+
+ if(use_srollable_cursors(state)) {
+ /* This function will fail if the driver does not support scrollable
+ cursors, this is expected and will not cause any damage*/
+ SQLSetStmtAttr(statement_handle(state),
+ (SQLINTEGER)SQL_ATTR_CURSOR_SCROLLABLE,
+ (SQLPOINTER)SQL_SCROLLABLE, (SQLINTEGER)0);
+ }
+
+ if(!sql_success(SQLExecDirect(statement_handle(state), sql, SQL_NTS))) {
+ diagnos = get_diagnos(SQL_HANDLE_STMT, statement_handle(state));
+ clean_state(state);
+ return encode_error_message(diagnos.error_msg);
+ }
+
+ if(!sql_success(SQLNumResultCols(statement_handle(state),
+ &num_of_columns)))
+ DO_EXIT(EXIT_COLS);
+
+ nr_of_columns(state) = (int)num_of_columns;
+ columns(state) = alloc_column_buffer(nr_of_columns(state));
+
+ if(!sql_success(SQLRowCount(statement_handle(state), &num_of_rows)))
+ DO_EXIT(EXIT_ROWS);
+
+ return encode_row_count(num_of_rows, state);
+}
+
+/* Description: Fetches rows from the result set associated with the
+ connection by db_select_count. The method of seletion will be according
+ too <args> */
+static db_result_msg db_select(byte *args, db_state *state)
+{
+ db_result_msg msg;
+ SQLSMALLINT num_of_columns;
+ int offset, n, orientation;
+ byte erlOrientation;
+
+ erlOrientation = args[0];
+
+ switch(erlOrientation) {
+ case SELECT_FIRST:
+ orientation = SQL_FETCH_FIRST;
+ offset = DUMMY_OFFSET;
+ n = 1;
+ break;
+ case SELECT_LAST:
+ orientation = SQL_FETCH_LAST;
+ offset = DUMMY_OFFSET;
+ n = 1;
+ break;
+ case SELECT_NEXT:
+ orientation = SQL_FETCH_NEXT;
+ offset = DUMMY_OFFSET;
+ n = 1;
+ break;
+ case SELECT_PREV:
+ orientation = SQL_FETCH_PRIOR;
+ offset = DUMMY_OFFSET;
+ n = 1;
+ break;
+ case SELECT_ABSOLUTE:
+ orientation = SQL_FETCH_ABSOLUTE;
+ offset = atoi(strtok((char *)(args + sizeof(byte)), ";"));
+ n = atoi(strtok(NULL, ";"));
+ break;
+ case SELECT_RELATIVE:
+ orientation = SQL_FETCH_RELATIVE;
+ offset = atoi(strtok((char *)(args + sizeof(byte)), ";"));
+ n = atoi(strtok(NULL, ";"));
+ break;
+ case SELECT_N_NEXT:
+ orientation = SQL_FETCH_NEXT;
+ offset = atoi(strtok((char *)(args + sizeof(byte)), ";"));
+ n = atoi(strtok(NULL, ";"));
+ }
+
+ msg = encode_empty_message();
+
+ ei_x_new(&dynamic_buffer(state));
+ ei_x_new_with_version(&dynamic_buffer(state));
+ ei_x_encode_tuple_header(&dynamic_buffer(state), 3);
+ ei_x_encode_atom(&dynamic_buffer(state), "selected");
+
+ num_of_columns = nr_of_columns(state);
+ msg = encode_column_name_list(num_of_columns, state);
+ if (msg.length == 0) { /* If no error has occurred */
+ msg = encode_value_list_scroll(num_of_columns,
+ (SQLSMALLINT)orientation,
+ (SQLINTEGER)offset,
+ n, state);
+ }
+
+ if (msg.length != 0) { /* An error has occurred */
+ ei_x_free(&(dynamic_buffer(state)));
+ return msg;
+ } else {
+ msg.buffer = dynamic_buffer(state).buff;
+ msg.length = dynamic_buffer(state).index;
+ msg.dyn_alloc = TRUE;
+ return msg;
+ }
+}
+
+/* Description: Handles parameterized queries ex:
+ INSERT INTO FOO VALUES(?, ?) */
+static db_result_msg db_param_query(byte *buffer, db_state *state)
+{
+ byte *sql;
+ db_result_msg msg;
+ int i, num_param_values, ver = 0,
+ erl_type = 0, index = 0, size = 0, cols = 0;
+ long long_num_param_values;
+ param_status param_status;
+ diagnos diagnos;
+ param_array *params;
+
+ if (associated_result_set(state)) {
+ clean_state(state);
+ }
+ associated_result_set(state) = FALSE;
+ param_query(state) = TRUE;
+
+ msg = encode_empty_message();
+
+ ei_decode_version(buffer, &index, &ver);
+
+ ei_decode_tuple_header(buffer, &index, &size);
+
+ ei_get_type(buffer, &index, &erl_type, &size);
+
+ sql = (byte*)safe_malloc((sizeof(byte) * (size + 1)));
+ ei_decode_string(buffer, &index, sql);
+
+ ei_decode_long(buffer, &index, &long_num_param_values);
+
+ num_param_values = (int)long_num_param_values;
+ ei_decode_list_header(buffer, &index, &cols);
+
+
+ init_param_statement(cols, num_param_values, state, &param_status);
+
+ params = bind_parameter_arrays(buffer, &index, cols,
+ num_param_values, state);
+
+ if(params != NULL) {
+ if(!sql_success(SQLExecDirect(statement_handle(state),
+ sql, SQL_NTS))) {
+ diagnos = get_diagnos(SQL_HANDLE_STMT, statement_handle(state));
+ msg = encode_error_message(diagnos.error_msg);
+ } else {
+ for (i = 0; i < param_status.params_processed; i++) {
+ switch (param_status.param_status_array[i]) {
+ case SQL_PARAM_SUCCESS:
+ case SQL_PARAM_SUCCESS_WITH_INFO:
+ /* SQL_PARAM_DIAG_UNAVAILABLE is entered when the
+ * driver treats arrays of parameters as a monolithic
+ * unit, so it does not generate this individual
+ * parameter level of error information. */
+ case SQL_PARAM_DIAG_UNAVAILABLE:
+ break;
+ default:
+ diagnos =
+ get_diagnos(SQL_HANDLE_STMT, statement_handle(state));
+ msg = encode_error_message(diagnos.error_msg);
+ i = param_status.params_processed;
+ break;
+ }
+ }
+ if(msg.length == 0) {
+ ei_x_new_with_version(&dynamic_buffer(state));
+ if(out_params(state)){
+ msg = encode_out_params(state, cols, params, num_param_values);
+ }else{
+ msg = encode_result(state);
+ }
+ if(msg.length == 0) {
+ msg.buffer = dynamic_buffer(state).buff;
+ msg.length = dynamic_buffer(state).index;
+ msg.dyn_alloc = TRUE;
+ } else { /* Error occurred */
+ ei_x_free(&(dynamic_buffer(state)));
+ }
+ }
+ }
+
+ if(!sql_success(SQLFreeStmt(statement_handle(state),
+ SQL_RESET_PARAMS))) {
+ DO_EXIT(EXIT_FREE);
+ }
+ } else {
+ msg = encode_atom_message("param_badarg");
+ }
+
+ free(sql);
+
+ free_params(&params, cols);
+
+ free(param_status.param_status_array);
+
+ if(!sql_success(SQLFreeHandle(SQL_HANDLE_STMT,
+ statement_handle(state)))){
+ DO_EXIT(EXIT_FREE);
+ }
+ statement_handle(state) = NULL;
+ param_query(state) = FALSE;
+ return msg;
+}
+
+
+static db_result_msg db_describe_table(byte *sql, db_state *state)
+{
+ db_result_msg msg;
+ SQLSMALLINT num_of_columns;
+ SQLCHAR name[MAX_NAME];
+ SQLSMALLINT name_len, sql_type, dec_digits, nullable;
+ SQLLEN size;
+ diagnos diagnos;
+ int i;
+
+ if (associated_result_set(state)) {
+ clean_state(state);
+ }
+ associated_result_set(state) = FALSE;
+
+ msg = encode_empty_message();
+
+ if(!sql_success(SQLAllocHandle(SQL_HANDLE_STMT,
+ connection_handle(state),
+ &statement_handle(state))))
+ DO_EXIT(EXIT_ALLOC);
+
+ if (!sql_success(SQLPrepare(statement_handle(state), sql, SQL_NTS))){
+ diagnos = get_diagnos(SQL_HANDLE_STMT, statement_handle(state));
+ msg = encode_error_message(diagnos.error_msg);
+ clean_state(state);
+ return msg;
+ }
+
+ if(!sql_success(SQLNumResultCols(statement_handle(state),
+ &num_of_columns))) {
+ diagnos = get_diagnos(SQL_HANDLE_STMT, statement_handle(state));
+ msg = encode_error_message(diagnos.error_msg);
+ clean_state(state);
+ return msg;
+ }
+
+ ei_x_new_with_version(&dynamic_buffer(state));
+ ei_x_encode_tuple_header(&dynamic_buffer(state), 2);
+ ei_x_encode_atom(&dynamic_buffer(state), "ok");
+ ei_x_encode_list_header(&dynamic_buffer(state), num_of_columns);
+
+ for (i = 0; i < num_of_columns; ++i) {
+
+ if(!sql_success(SQLDescribeCol(statement_handle(state),
+ (SQLUSMALLINT)(i+1),
+ name, sizeof(name), &name_len,
+ &sql_type, &size, &dec_digits,
+ &nullable)))
+ DO_EXIT(EXIT_DESC);
+
+ ei_x_encode_tuple_header(&dynamic_buffer(state), 2);
+ ei_x_encode_string_len(&dynamic_buffer(state),
+ (char *)name, name_len);
+ encode_data_type(sql_type, size, dec_digits, state);
+ }
+
+ ei_x_encode_empty_list(&dynamic_buffer(state));
+
+ clean_state(state);
+ msg.buffer = dynamic_buffer(state).buff;
+ msg.length = dynamic_buffer(state).index;
+ msg.dyn_alloc = TRUE;
+ return msg;
+}
+
+
+/* ----------------- Encode/decode functions -----------------------------*/
+
+static db_result_msg encode_empty_message(void)
+{
+ db_result_msg msg;
+
+ msg.length = 0;
+ msg.buffer = NULL;
+ msg.dyn_alloc = FALSE;
+
+ return msg;
+}
+
+/* Description: Encode an error-message to send back to erlang*/
+static db_result_msg encode_error_message(char *reason)
+{
+ int index;
+ db_result_msg msg;
+
+ index = 0;
+ ei_encode_version(NULL, &index);
+ ei_encode_tuple_header(NULL, &index, 2);
+ ei_encode_atom(NULL, &index, "error");
+ ei_encode_string(NULL, &index, reason);
+
+ msg.length = index;
+ msg.buffer = (byte *)safe_malloc(index);
+ msg.dyn_alloc = FALSE;
+
+ index = 0;
+ ei_encode_version((char *)msg.buffer, &index);
+ ei_encode_tuple_header((char *)msg.buffer, &index, 2);
+ ei_encode_atom((char *)msg.buffer, &index, "error");
+ ei_encode_string((char *)msg.buffer, &index, reason);
+
+ return msg;
+}
+
+/* Description: Encode a messge that is a erlang atom */
+static db_result_msg encode_atom_message(char* atom)
+{
+ int index;
+ db_result_msg msg;
+
+ index = 0;
+ ei_encode_version(NULL, &index);
+ ei_encode_atom(NULL, &index, atom);
+
+ msg.length = index;
+ msg.buffer = (byte *)safe_malloc(index);
+ msg.dyn_alloc = FALSE;
+
+ index = 0;
+ ei_encode_version((char *)msg.buffer, &index);
+ ei_encode_atom((char *)msg.buffer, &index, atom);
+
+ return msg;
+}
+
+
+/* Top encode function for db_query that encodes the resulting erlang
+ term to be returned to the erlang client. */
+static db_result_msg encode_result(db_state *state)
+{
+ SQLSMALLINT num_of_columns = 0;
+ SQLLEN RowCountPtr = 0;
+ SQLINTEGER paramBatch = 0;
+ db_result_msg msg;
+ int elements, update, num_of_rows = 0;
+ char *atom;
+
+ msg = encode_empty_message();
+
+ if(!sql_success(SQLNumResultCols(statement_handle(state),
+ &num_of_columns))) {
+ DO_EXIT(EXIT_COLS);
+ }
+
+ if (num_of_columns == 0) {
+ elements = 2;
+ atom = "updated";
+ update = TRUE;
+ } else {
+ elements = 3;
+ atom = "selected";
+ update = FALSE;
+ }
+
+ if(!sql_success(SQLRowCount(statement_handle(state), &RowCountPtr))) {
+ DO_EXIT(EXIT_ROWS);
+ }
+
+ if(param_query(state) && update) {
+ if(!sql_success(SQLGetInfo(connection_handle(state),
+ SQL_PARAM_ARRAY_ROW_COUNTS,
+ (SQLPOINTER)&paramBatch,
+ sizeof(paramBatch),
+ NULL))) {
+ DO_EXIT(EXIT_DRIVER_INFO);
+ }
+
+ if(paramBatch == SQL_PARC_BATCH ) {
+ /* Individual row counts (one for each parameter set)
+ are available, sum them up */
+ do {
+ num_of_rows = num_of_rows + (int)RowCountPtr;
+ msg = more_result_sets(state);
+ /* We don't want to continue if an error occured */
+ if (msg.length != 0) {
+ return msg;
+ }
+ if(exists_more_result_sets(state)) {
+ if(!sql_success(SQLRowCount(statement_handle(state),
+ &RowCountPtr))) {
+ DO_EXIT(EXIT_ROWS);
+ }
+ }
+ } while (exists_more_result_sets(state));
+ } else {
+ /* Row counts are rolled up into one (SQL_PARC_NO_BATCH) */
+ num_of_rows = (int)RowCountPtr;
+ }
+ } else {
+ num_of_rows = (int)RowCountPtr;
+ }
+ ei_x_encode_tuple_header(&dynamic_buffer(state), elements);
+ ei_x_encode_atom(&dynamic_buffer(state), atom);
+ if (update) {
+ if(num_of_rows < 0 ) {
+ ei_x_encode_atom(&dynamic_buffer(state), "undefined");
+ } else {
+ ei_x_encode_long(&dynamic_buffer(state), num_of_rows);
+ }
+ } else {
+ msg = encode_result_set(num_of_columns, state);
+ }
+ return msg;
+}
+
+static db_result_msg encode_out_params(db_state *state,
+ int num_of_params,
+ param_array* params,
+ int num_param_values)
+{
+ int num_of_columns = 0;
+ int i = 0;
+ int j = 0;
+ param_array column;
+ db_result_msg msg;
+ msg = encode_empty_message();
+
+ ei_x_encode_tuple_header(&dynamic_buffer(state), 3);
+ ei_x_encode_atom(&dynamic_buffer(state), "executed");
+
+ num_of_columns = num_out_params(num_of_params, params);
+ ei_x_encode_long(&dynamic_buffer(state), num_of_columns);
+
+ ei_x_encode_list_header(&dynamic_buffer(state), num_param_values);
+ for(j =0; j < num_param_values; j ++){
+
+ if(tuple_row(state)) {
+ ei_x_encode_tuple_header(&dynamic_buffer(state), num_of_columns);
+
+ } else {
+ ei_x_encode_list_header(&dynamic_buffer(state), num_of_columns);
+ }
+
+ for (i = 0; i< num_of_params; i++) {
+ if(params[i].input_output_type==SQL_PARAM_INPUT){
+ continue;
+ }
+ column = params[i];
+ if (column.type.len == 0 ||
+ column.type.strlen_or_indptr == SQL_NULL_DATA) {
+ ei_x_encode_atom(&dynamic_buffer(state), "null");
+ } else {
+ void* values = retrive_param_values(&column);
+ switch(column.type.c) {
+ case SQL_C_CHAR:
+ ei_x_encode_string(&dynamic_buffer(state), ((char*)values)+j*column.type.len);
+ break;
+ case SQL_C_SLONG:
+ ei_x_encode_long(&dynamic_buffer(state), ((long*)values)[j]);
+ break;
+ case SQL_C_DOUBLE:
+ ei_x_encode_double(&dynamic_buffer(state),
+ ((double*)values)[j]);
+ break;
+ case SQL_C_BIT:
+ ei_x_encode_atom(&dynamic_buffer(state),
+ ((Boolean*)values)[j]==TRUE?"true":"false");
+ break;
+ default:
+ ei_x_encode_atom(&dynamic_buffer(state), "error");
+ break;
+ }
+ }
+ }
+ if(!tuple_row(state)) {
+ ei_x_encode_empty_list(&dynamic_buffer(state));
+ }
+ }
+ ei_x_encode_empty_list(&dynamic_buffer(state));
+ return msg;
+}
+
+static int num_out_params(int num_of_params, param_array* params)
+{
+ int ret = 0;
+ int i = 0;
+ for(i=0; i < num_of_params; i++){
+ if(params[i].input_output_type==SQL_PARAM_INPUT_OUTPUT ||
+ params[i].input_output_type==SQL_PARAM_OUTPUT)
+ ret++;
+ }
+ return ret;
+}
+
+/* Description: Encodes the result set into the "ei_x" - dynamic_buffer
+ held by the state variable */
+static db_result_msg encode_result_set(SQLSMALLINT num_of_columns,
+ db_state *state)
+{
+ db_result_msg msg;
+
+ columns(state) = alloc_column_buffer(num_of_columns);
+
+ msg = encode_column_name_list(num_of_columns, state);
+ if (msg.length == 0) { /* If no error has occurred */
+ msg = encode_value_list(num_of_columns, state);
+ }
+
+ free_column_buffer(&(columns(state)), num_of_columns);
+
+ return msg;
+}
+
+/* Description: Encodes the list of column names into the "ei_x" -
+ dynamic_buffer held by the state variable */
+static db_result_msg encode_column_name_list(SQLSMALLINT num_of_columns,
+ db_state *state)
+{
+ int i;
+ db_result_msg msg;
+ SQLCHAR name[MAX_NAME];
+ SQLSMALLINT name_len, sql_type, dec_digits, nullable;
+ SQLLEN size;
+ SQLRETURN result;
+
+ msg = encode_empty_message();
+
+ ei_x_encode_list_header(&dynamic_buffer(state), num_of_columns);
+
+ for (i = 0; i < num_of_columns; ++i) {
+
+ if(!sql_success(SQLDescribeCol(statement_handle(state),
+ (SQLSMALLINT)(i+1),
+ name, sizeof(name), &name_len,
+ &sql_type, &size, &dec_digits,
+ &nullable)))
+ DO_EXIT(EXIT_DESC);
+
+ if(sql_type == SQL_LONGVARCHAR || sql_type == SQL_LONGVARBINARY)
+ size = MAXCOLSIZE;
+
+ (columns(state)[i]).type.decimal_digits = dec_digits;
+ (columns(state)[i]).type.sql = sql_type;
+ (columns(state)[i]).type.col_size = size;
+
+ msg = map_sql_2_c_column(&columns(state)[i]);
+ if (msg.length > 0) {
+ return msg; /* An error has occurred */
+ } else {
+ if (columns(state)[i].type.len > 0) {
+ columns(state)[i].buffer =
+ (char *)safe_malloc(columns(state)[i].type.len);
+
+ if (columns(state)[i].type.c == SQL_C_BINARY) {
+ /* retrived later by retrive_binary_data */
+ }else {
+ if(!sql_success(
+ SQLBindCol
+ (statement_handle(state),
+ (SQLSMALLINT)(i+1),
+ columns(state)[i].type.c,
+ columns(state)[i].buffer,
+ columns(state)[i].type.len,
+ &columns(state)[i].type.strlen_or_indptr)))
+ DO_EXIT(EXIT_BIND);
+ }
+ ei_x_encode_string_len(&dynamic_buffer(state),
+ name, name_len);
+ }
+ else {
+ columns(state)[i].type.len = 0;
+ columns(state)[i].buffer = NULL;
+ }
+ }
+ }
+ ei_x_encode_empty_list(&dynamic_buffer(state));
+
+ return msg;
+}
+
+/* Description: Encodes the list(s) of row values fetched by SQLFetch into
+ the "ei_x" - dynamic_buffer held by the state variable */
+static db_result_msg encode_value_list(SQLSMALLINT num_of_columns,
+ db_state *state)
+{
+ int i, msg_len;
+ SQLRETURN result;
+ db_result_msg list_result;
+ db_result_msg msg;
+
+ msg = encode_empty_message();
+
+ for (;;) {
+ /* fetch the next row */
+ result = SQLFetch(statement_handle(state));
+
+ if (result == SQL_NO_DATA) /* Reached end of result set */
+ {
+ break;
+ }
+
+ ei_x_encode_list_header(&dynamic_buffer(state), 1);
+
+ if(tuple_row(state)) {
+ ei_x_encode_tuple_header(&dynamic_buffer(state),
+ num_of_columns);
+ } else {
+ ei_x_encode_list_header(&dynamic_buffer(state), num_of_columns);
+ }
+
+ for (i = 0; i < num_of_columns; i++) {
+ encode_column_dyn(columns(state)[i], i, state);
+ }
+
+ if(!tuple_row(state)) {
+ ei_x_encode_empty_list(&dynamic_buffer(state));
+ }
+ }
+ ei_x_encode_empty_list(&dynamic_buffer(state));
+ return msg;
+}
+
+/* Description: Encodes the list(s) of row values fetched with
+ SQLFetchScroll into the "ei_x" - dynamic_buffer held by the state
+ variable */
+static db_result_msg encode_value_list_scroll(SQLSMALLINT num_of_columns,
+ SQLSMALLINT Orientation,
+ SQLINTEGER OffSet, int N,
+ db_state *state)
+{
+ int i, j, msg_len;
+ SQLRETURN result;
+ db_result_msg list_result;
+ db_result_msg msg;
+
+ msg = encode_empty_message();
+
+ for (j = 0; j < N; j++) {
+ if((j > 0) && (Orientation == SQL_FETCH_ABSOLUTE)) {
+ OffSet++;
+ }
+
+ if((j == 1) && (Orientation == SQL_FETCH_RELATIVE)) {
+ OffSet = 1;
+ }
+
+ result = SQLFetchScroll(statement_handle(state), Orientation,
+ OffSet);
+
+ if (result == SQL_NO_DATA) /* Reached end of result set */
+ {
+ break;
+ }
+ ei_x_encode_list_header(&dynamic_buffer(state), 1);
+
+ if(tuple_row(state)) {
+ ei_x_encode_tuple_header(&dynamic_buffer(state),
+ num_of_columns);
+ } else {
+ ei_x_encode_list_header(&dynamic_buffer(state), num_of_columns);
+ }
+ for (i = 0; i < num_of_columns; i++) {
+ encode_column_dyn(columns(state)[i], i, state);
+ }
+ if(!tuple_row(state)) {
+ ei_x_encode_empty_list(&dynamic_buffer(state));
+ }
+ }
+ ei_x_encode_empty_list(&dynamic_buffer(state));
+ return msg;
+}
+
+/* Encodes row count result for erlang */
+static db_result_msg encode_row_count(SQLINTEGER num_of_rows,
+ db_state *state)
+{
+ db_result_msg msg;
+ int index;
+
+ index = 0;
+ ei_encode_version(NULL, &index);
+ ei_encode_tuple_header(NULL, &index, 2);
+ ei_encode_atom(NULL, &index, "ok");
+ if(num_of_rows == -1)
+ {
+ ei_encode_atom(NULL, &index, "undefined");
+ } else {
+ ei_encode_long(NULL, &index, num_of_rows);
+ }
+ msg.length = index;
+ msg.buffer = (byte *)safe_malloc(index);
+ msg.dyn_alloc = FALSE;
+
+ index = 0;
+ ei_encode_version((char *)msg.buffer, &index);
+ ei_encode_tuple_header((char *)msg.buffer, &index, 2);
+ ei_encode_atom((char *)msg.buffer, &index, "ok");
+
+ if(num_of_rows == -1)
+ {
+ ei_encode_atom((char *)msg.buffer, &index, "undefined");
+ } else {
+ ei_encode_long((char *)msg.buffer, &index, num_of_rows);
+ }
+ return msg;
+}
+
+/* Description: Encodes the a column value into the "ei_x" - dynamic_buffer
+ held by the state variable */
+static void encode_column_dyn(db_column column, int column_nr,
+ db_state *state)
+{
+ if (column.type.len == 0 ||
+ column.type.strlen_or_indptr == SQL_NULL_DATA) {
+ ei_x_encode_atom(&dynamic_buffer(state), "null");
+ } else {
+ switch(column.type.c) {
+ case SQL_C_CHAR:
+ ei_x_encode_string(&dynamic_buffer(state), column.buffer);
+ break;
+ case SQL_C_SLONG:
+ ei_x_encode_long(&dynamic_buffer(state),
+ *(SQLINTEGER*)column.buffer);
+ break;
+ case SQL_C_DOUBLE:
+ ei_x_encode_double(&dynamic_buffer(state),
+ *(double*)column.buffer);
+ break;
+ case SQL_C_BIT:
+ ei_x_encode_atom(&dynamic_buffer(state),
+ column.buffer[0]?"true":"false");
+ break;
+ case SQL_C_BINARY:
+ column = retrive_binary_data(column, column_nr, state);
+ ei_x_encode_string(&dynamic_buffer(state), (void *)column.buffer);
+ break;
+ default:
+ ei_x_encode_atom(&dynamic_buffer(state), "error");
+ break;
+ }
+ }
+}
+
+static void encode_data_type(SQLINTEGER sql_type, SQLINTEGER size,
+ SQLSMALLINT decimal_digits, db_state *state)
+{
+ switch(sql_type) {
+ case SQL_CHAR:
+ ei_x_encode_tuple_header(&dynamic_buffer(state), 2);
+ ei_x_encode_atom(&dynamic_buffer(state), "sql_char");
+ ei_x_encode_long(&dynamic_buffer(state), size);
+ break;
+ case SQL_VARCHAR:
+ ei_x_encode_tuple_header(&dynamic_buffer(state), 2);
+ ei_x_encode_atom(&dynamic_buffer(state), "sql_varchar");
+ ei_x_encode_long(&dynamic_buffer(state), size);
+ break;
+ case SQL_NUMERIC:
+ ei_x_encode_tuple_header(&dynamic_buffer(state), 3);
+ ei_x_encode_atom(&dynamic_buffer(state), "sql_numeric");
+ ei_x_encode_long(&dynamic_buffer(state), size);
+ ei_x_encode_long(&dynamic_buffer(state), decimal_digits);
+ break;
+ case SQL_DECIMAL:
+ ei_x_encode_tuple_header(&dynamic_buffer(state), 3);
+ ei_x_encode_atom(&dynamic_buffer(state), "sql_decimal");
+ ei_x_encode_long(&dynamic_buffer(state), size);
+ ei_x_encode_long(&dynamic_buffer(state), decimal_digits);
+ break;
+ case SQL_INTEGER:
+ ei_x_encode_atom(&dynamic_buffer(state), "sql_integer");
+ break;
+ case SQL_TINYINT:
+ ei_x_encode_atom(&dynamic_buffer(state), "sql_tinyint");
+ break;
+ case SQL_SMALLINT:
+ ei_x_encode_atom(&dynamic_buffer(state), "sql_smallint");
+ break;
+ case SQL_REAL:
+ ei_x_encode_atom(&dynamic_buffer(state), "sql_real");
+ break;
+ case SQL_FLOAT:
+ ei_x_encode_tuple_header(&dynamic_buffer(state), 2);
+ ei_x_encode_atom(&dynamic_buffer(state), "sql_float");
+ ei_x_encode_long(&dynamic_buffer(state), size);
+ break;
+ case SQL_DOUBLE:
+ ei_x_encode_atom(&dynamic_buffer(state), "sql_double");
+ break;
+ case SQL_BIT:
+ ei_x_encode_atom(&dynamic_buffer(state), "sql_bit");
+ break;
+ case SQL_TYPE_DATE:
+ ei_x_encode_atom(&dynamic_buffer(state), "SQL_TYPE_DATE");
+ break;
+ case SQL_TYPE_TIME:
+ ei_x_encode_atom(&dynamic_buffer(state), "SQL_TYPE_TIME");
+ break;
+ case SQL_TYPE_TIMESTAMP:
+ ei_x_encode_atom(&dynamic_buffer(state), "SQL_TYPE_TIMESTAMP");
+ break;
+ case SQL_BIGINT:
+ ei_x_encode_atom(&dynamic_buffer(state), "SQL_BIGINT");
+ break;
+ case SQL_BINARY:
+ ei_x_encode_atom(&dynamic_buffer(state), "SQL_BINARY");
+ break;
+ case SQL_LONGVARCHAR:
+ ei_x_encode_atom(&dynamic_buffer(state), "SQL_LONGVARCHAR");
+ break;
+ case SQL_VARBINARY:
+ ei_x_encode_atom(&dynamic_buffer(state), "SQL_VARBINARY");
+ break;
+ case SQL_LONGVARBINARY:
+ ei_x_encode_atom(&dynamic_buffer(state), "SQL_LONGVARBINARY");
+ break;
+ case SQL_INTERVAL_MONTH:
+ ei_x_encode_atom(&dynamic_buffer(state), "SQL_INTERVAL_MONTH");
+ break;
+ case SQL_INTERVAL_YEAR:
+ ei_x_encode_atom(&dynamic_buffer(state), "SQL_INTERVAL_YEAR");
+ break;
+ case SQL_INTERVAL_DAY:
+ ei_x_encode_atom(&dynamic_buffer(state), "SQL_INTERVAL_DAY");
+ break;
+ case SQL_INTERVAL_MINUTE:
+ ei_x_encode_atom(&dynamic_buffer(state), "SQL_INTERVAL_MINUTE");
+ break;
+ case SQL_INTERVAL_HOUR_TO_SECOND:
+ ei_x_encode_atom(&dynamic_buffer(state),
+ "SQL_INTERVAL_HOUR_TO_SECOND");
+ break;
+ case SQL_INTERVAL_MINUTE_TO_SECOND:
+ ei_x_encode_atom(&dynamic_buffer(state),
+ "SQL_INTERVAL_MINUTE_TO_SECOND");
+ break;
+ case SQL_UNKNOWN_TYPE:
+ ei_x_encode_atom(&dynamic_buffer(state), "SQL_UNKNOWN_TYPE");
+ break;
+ default: /* Will probably never happen */
+ ei_x_encode_atom(&dynamic_buffer(state), "ODBC_UNSUPPORTED_TYPE");
+ break;
+ }
+}
+
+static Boolean decode_params(byte *buffer, int *index, param_array **params,
+ int i, int j)
+{
+ int erl_type, size;
+ long bin_size, l64;
+ param_array* param;
+
+ ei_get_type(buffer, index, &erl_type, &size);
+ param = &(*params)[i];
+
+ switch (param->type.c) {
+ case SQL_C_CHAR:
+ if(erl_type != ERL_STRING_EXT) {
+ return FALSE;
+ }
+
+ ei_decode_string(buffer, index, &(param->values.string[param->offset]));
+ param->offset += param->type.len;
+ param->type.strlen_or_indptr_array[j] = SQL_NTS;
+ break;
+
+ case SQL_C_SLONG:
+ if(!((erl_type == ERL_SMALL_INTEGER_EXT) ||
+ (erl_type == ERL_INTEGER_EXT) ||
+ (erl_type == ERL_SMALL_BIG_EXT) ||
+ (erl_type == ERL_LARGE_BIG_EXT))) {
+ return FALSE;
+ }
+
+ if(ei_decode_long(buffer, index, &l64)) {
+ return FALSE;
+ }
+
+ /* For 64-bit platforms we downcast 8-byte long
+ * to 4-byte SQLINTEGER, checking for overflow */
+
+ if(l64>INT_MAX || l64<INT_MIN) {
+ return FALSE;
+ }
+
+ param->values.integer[j]=(SQLINTEGER)l64;
+ break;
+
+ case SQL_C_DOUBLE:
+ if((erl_type != ERL_FLOAT_EXT)) {
+ return FALSE;
+ }
+ ei_decode_double(buffer, index, &(param->values.floating[j]));
+ break;
+
+ case SQL_C_BIT:
+ if((erl_type != ERL_ATOM_EXT)) {
+ return FALSE;
+ }
+ ei_decode_boolean(buffer, index, &(param->values.bool[j]));
+ break;
+
+ default:
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/*------------- Erlang port communication functions ----------------------*/
+
+/* read from stdin */
+#ifdef WIN32
+static int read_exact(byte *buffer, int len)
+{
+ HANDLE standard_input = GetStdHandle(STD_INPUT_HANDLE);
+
+ unsigned read_result;
+ unsigned sofar = 0;
+
+ if (!len) { /* Happens for "empty packages */
+ return 0;
+ }
+ for (;;) {
+ if (!ReadFile(standard_input, buffer + sofar,
+ len - sofar, &read_result, NULL)) {
+ return -1; /* EOF */
+ }
+ if (!read_result) {
+ return -2; /* Interrupted while reading? */
+ }
+ sofar += read_result;
+ if (sofar == len) {
+ return len;
+ }
+ }
+}
+#elif defined(UNIX)
+static int read_exact(byte *buffer, int len) {
+ int i, got = 0;
+
+ do {
+ if ((i = read(0, buffer + got, len - got)) <= 0)
+ return(i);
+ got += i;
+ } while (got < len);
+ return len;
+
+}
+#endif
+
+
+/* Recieive (read) data from erlang on stdin */
+static byte * receive_erlang_port_msg(void)
+{
+ int i, len = 0;
+ byte *buffer;
+ byte lengthstr[LENGTH_INDICATOR_SIZE];
+
+ if(read_exact(lengthstr, LENGTH_INDICATOR_SIZE) !=
+ LENGTH_INDICATOR_SIZE)
+ {
+ DO_EXIT(EXIT_STDIN_HEADER);
+ }
+ for(i=0; i < LENGTH_INDICATOR_SIZE; i++) {
+ len <<= 8;
+ len |= lengthstr[i];
+ }
+
+ buffer = (byte *)safe_malloc(len);
+
+ if (read_exact(buffer, len) <= 0) {
+ DO_EXIT(EXIT_STDIN_BODY);
+ }
+
+ return buffer;
+}
+
+/* ------------- Socket communication functions --------------------------*/
+#define USE_IPV4
+#ifdef UNIX
+#define SOCKET int
+#endif
+
+#if defined WIN32 || defined USE_IPV4
+/* Currently only an old windows compiler is supported so we do not have ipv6
+ capabilities */
+static SOCKET connect_to_erlang(const char *port)
+{
+ SOCKET sock;
+ struct sockaddr_in sin;
+
+ sock = socket(AF_INET, SOCK_STREAM, 0);
+
+ memset(&sin, 0, sizeof(sin));
+ sin.sin_port = htons ((unsigned short)atoi(port));
+ sin.sin_family = AF_INET;
+ sin.sin_addr.s_addr = inet_addr("127.0.0.1");
+
+ if (connect(sock, (struct sockaddr*)&sin, sizeof(sin)) != 0) {
+ close_socket(sock);
+ DO_EXIT(EXIT_SOCKET_CONNECT);
+ }
+ return sock;
+}
+#elif defined(UNIX)
+static int connect_to_erlang(const char *port)
+{
+ int sock;
+
+ struct addrinfo hints;
+ struct addrinfo *erlang_ai, *first;
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = PF_UNSPEC; /* PF_INET or PF_INET6 */
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_protocol = IPPROTO_TCP;
+
+ if (getaddrinfo("localhost", port, &hints, &first) != 0) {
+ DO_EXIT(EXIT_FAILURE);
+ }
+
+ for (erlang_ai = first; erlang_ai; erlang_ai = erlang_ai->ai_next) {
+
+ sock = socket(erlang_ai->ai_family, erlang_ai->ai_socktype,
+ erlang_ai->ai_protocol);
+ if (sock < 0)
+ continue;
+ if (connect(sock, (struct sockaddr*)erlang_ai->ai_addr,
+ erlang_ai->ai_addrlen) < 0) {
+ close(sock);
+ sock = -1;
+ continue;
+ } else {
+ break;
+ }
+ }
+ freeaddrinfo(first);
+
+ if (sock < 0){
+ close_socket(sock);
+ DO_EXIT(EXIT_SOCKET_CONNECT);
+ }
+
+ return sock;
+}
+#endif
+
+#ifdef WIN32
+static void close_socket(SOCKET socket)
+{
+ closesocket(socket);
+}
+#elif defined(UNIX)
+static void close_socket(int socket)
+{
+ close(socket);
+}
+#endif
+
+#ifdef WIN32
+static byte * receive_msg(SOCKET socket)
+#elif defined(UNIX)
+static byte * receive_msg(int socket)
+#endif
+{
+ byte lengthstr[LENGTH_INDICATOR_SIZE];
+ size_t msg_len = 0;
+ int i;
+ byte *buffer = NULL;
+
+ if(!receive_msg_part(socket, lengthstr, LENGTH_INDICATOR_SIZE)) {
+ close_socket(socket);
+ DO_EXIT(EXIT_SOCKET_RECV_HEADER);
+ }
+
+ for(i = 0; i < LENGTH_INDICATOR_SIZE; i++) {
+ msg_len <<= 8;
+ msg_len |= lengthstr[i];
+ }
+
+ buffer = (byte *)safe_malloc(msg_len);
+
+ if(!receive_msg_part(socket, buffer, msg_len)) {
+ close_socket(socket);
+ DO_EXIT(EXIT_SOCKET_RECV_BODY);
+ }
+
+ return buffer;
+}
+
+#ifdef WIN32
+static Boolean receive_msg_part(SOCKET socket, byte * buffer, size_t msg_len)
+#elif defined(UNIX)
+static Boolean receive_msg_part(int socket, byte * buffer, size_t msg_len)
+#endif
+{
+ int nr_bytes_received = 0;
+
+ nr_bytes_received = recv(socket, (void *)buffer, msg_len, 0);
+
+ if(nr_bytes_received == msg_len) {
+ return TRUE;
+ } else if(nr_bytes_received > 0 && nr_bytes_received < msg_len) {
+ return receive_msg_part(socket, buffer + nr_bytes_received,
+ msg_len - nr_bytes_received);
+ } else if(nr_bytes_received == -1) {
+ return FALSE;
+ } else { /* nr_bytes_received > msg_len */
+ close_socket(socket);
+ DO_EXIT(EXIT_SOCKET_RECV_MSGSIZE);
+ }
+}
+
+#ifdef WIN32
+static void send_msg(db_result_msg *msg, SOCKET socket)
+#elif defined(UNIX)
+static void send_msg(db_result_msg *msg, int socket)
+#endif
+{
+ byte lengthstr[LENGTH_INDICATOR_SIZE];
+ int len;
+ len = msg ->length;
+
+ lengthstr[0] = (len >> 24) & 0x000000FF;
+ lengthstr[1] = (len >> 16) & 0x000000FF;
+ lengthstr[2] = (len >> 8) & 0x000000FF;
+ lengthstr[3] = len & 0x000000FF;
+
+ if(!send_msg_part(socket, lengthstr, LENGTH_INDICATOR_SIZE)) {
+ close_socket(socket);
+ DO_EXIT(EXIT_SOCKET_SEND_HEADER);
+ }
+
+ if(!send_msg_part(socket, msg->buffer, len)) {
+ close_socket(socket);
+ DO_EXIT(EXIT_SOCKET_SEND_BODY);
+ }
+}
+
+#ifdef WIN32
+static Boolean send_msg_part(SOCKET socket, byte * buffer, size_t msg_len)
+#elif defined(UNIX)
+static Boolean send_msg_part(int socket, byte * buffer, size_t msg_len)
+#endif
+{
+ int nr_bytes_sent = 0;
+
+ nr_bytes_sent = send(socket, (void *)buffer, msg_len, 0);
+
+ if(nr_bytes_sent == msg_len) {
+ return TRUE;
+ } else if(nr_bytes_sent > 0 && nr_bytes_sent < msg_len) {
+ return send_msg_part(socket, buffer + nr_bytes_sent,
+ msg_len - nr_bytes_sent);
+ } else if(nr_bytes_sent == -1) {
+ return FALSE;
+ } else { /* nr_bytes_sent > msg_len */
+ close_socket(socket);
+ DO_EXIT(EXIT_SOCKET_SEND_MSGSIZE);
+ }
+}
+
+#ifdef WIN32
+static void init_winsock(void)
+{
+ WORD wVersionRequested;
+ WSADATA wsaData;
+ int err;
+
+ wVersionRequested = MAKEWORD( 2, 0 );
+
+ err = WSAStartup( wVersionRequested, &wsaData );
+ if ( err != 0 ) {
+ DO_EXIT(EXIT_OLD_WINSOCK);
+ }
+
+ if ( LOBYTE( wsaData.wVersion ) != 2 ||
+ HIBYTE( wsaData.wVersion ) != 0 ) {
+ clean_socket_lib();
+ DO_EXIT(EXIT_OLD_WINSOCK);
+ }
+}
+#endif
+
+static void clean_socket_lib(void)
+{
+#ifdef WIN32
+ WSACleanup();
+#endif
+}
+
+
+/*------------- Memmory handling funtions -------------------------------*/
+static void *safe_malloc(int size)
+{
+ void *memory;
+
+ memory = (void *)malloc(size);
+ if (memory == NULL)
+ DO_EXIT(EXIT_ALLOC);
+
+ return memory;
+}
+
+static void *safe_realloc(void *ptr, int size)
+{
+ void *memory;
+
+ memory = (void *)realloc(ptr, size);
+
+ if (memory == NULL)
+ {
+ free(ptr);
+ DO_EXIT(EXIT_ALLOC);
+ }
+ return memory;
+}
+
+/* Description: Allocate memory for n columns */
+static db_column * alloc_column_buffer(int n)
+{
+ int i;
+ db_column *columns;
+
+ columns = (db_column *)safe_malloc(n * sizeof(db_column));
+ for(i = 0; i < n; i++)
+ columns[i].buffer = NULL;
+
+ return columns;
+}
+
+/* Description: Deallocate memory allocated by alloc_column_buffer */
+static void free_column_buffer(db_column **columns, int n)
+{
+ int i;
+ if(*columns != NULL) {
+ for (i = 0; i < n; i++) {
+ if((*columns)[i].buffer != NULL) {
+ free((*columns)[i].buffer);
+ }
+ }
+ free(*columns);
+ *columns = NULL;
+ }
+}
+
+static void free_params(param_array **params, int cols)
+{
+ int i;
+ if(*params != NULL) {
+ for (i = 0; i < cols; i++) {
+ if((*params)[i].type.strlen_or_indptr_array != NULL){
+ free((*params)[i].type.strlen_or_indptr_array);
+ }
+ free(retrive_param_values(&((*params)[i])));
+ }
+ free(*params);
+ *params = NULL;
+ }
+}
+
+/* Description: Frees resources associated with the current statement handle
+ keeped in the state.*/
+static void clean_state(db_state *state)
+{
+ if(statement_handle(state) != NULL) {
+ if(!sql_success(SQLFreeHandle(SQL_HANDLE_STMT,
+ statement_handle(state)))) {
+ DO_EXIT(EXIT_FREE);
+ }
+ statement_handle(state) = NULL;
+ }
+ free_column_buffer(&(columns(state)), nr_of_columns(state));
+ columns(state) = NULL;
+ nr_of_columns(state) = 0;
+}
+
+/* ------------- Init/map/bind/retrive functions ------------------------*/
+
+/* Prepare the state for a connection */
+static void init_driver(int erl_auto_commit_mode, int erl_trace_driver,
+ db_state *state)
+{
+
+ int auto_commit_mode, trace_driver, use_srollable_cursors;
+
+ if(erl_auto_commit_mode == ON) {
+ auto_commit_mode = SQL_AUTOCOMMIT_ON;
+ } else {
+ auto_commit_mode = SQL_AUTOCOMMIT_OFF;
+ }
+
+ if(erl_trace_driver == ON) {
+ trace_driver = SQL_OPT_TRACE_ON;
+ } else {
+ trace_driver = SQL_OPT_TRACE_OFF;
+ }
+
+ if(!sql_success(SQLAllocHandle(SQL_HANDLE_ENV,
+ SQL_NULL_HANDLE,
+ &environment_handle(state))))
+ DO_EXIT(EXIT_ALLOC);
+ if(!sql_success(SQLSetEnvAttr(environment_handle(state),
+ SQL_ATTR_ODBC_VERSION,
+ (SQLPOINTER)SQL_OV_ODBC3, 0)))
+ DO_EXIT(EXIT_ENV);
+ if(!sql_success(SQLAllocHandle(SQL_HANDLE_DBC,
+ environment_handle(state),
+ &connection_handle(state))))
+ DO_EXIT(EXIT_ALLOC);
+ if(!sql_success(SQLSetConnectAttr(connection_handle(state),
+ SQL_ATTR_CONNECTION_TIMEOUT,
+ (SQLPOINTER)TIME_OUT, 0)))
+ DO_EXIT(EXIT_CONNECTION);
+ if(!sql_success(SQLSetConnectAttr(connection_handle(state),
+ SQL_ATTR_AUTOCOMMIT,
+ (SQLPOINTER)auto_commit_mode, 0)))
+ DO_EXIT(EXIT_CONNECTION);
+ if(!sql_success(SQLSetConnectAttr(connection_handle(state),
+ SQL_ATTR_TRACE,
+ (SQLPOINTER)trace_driver, 0)))
+ DO_EXIT(EXIT_CONNECTION);
+}
+
+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 in_or_out;
+
+ ei_decode_long(buffer, index, &user_type);
+
+ params->type.strlen_or_indptr = (SQLINTEGER)NULL;
+ params->type.strlen_or_indptr_array = NULL;
+ params->type.decimal_digits = (SQLINTEGER)0;
+
+ switch (user_type) {
+ case USER_SMALL_INT:
+ params->type.sql = SQL_SMALLINT;
+ params->type.c = SQL_C_SLONG;
+ params->type.len = sizeof(SQLINTEGER);
+ params->type.col_size = COL_SQL_SMALLINT;
+ params->values.integer =
+ (SQLINTEGER*)safe_malloc(num_param_values * params->type.len);
+ break;
+ case USER_INT:
+ params->type.sql = SQL_INTEGER;
+ params->type.c = SQL_C_SLONG;
+ params->type.len = sizeof(SQLINTEGER);
+ params->type.col_size = COL_SQL_INTEGER;
+ params->values.integer =
+ (SQLINTEGER*)safe_malloc(num_param_values * params->type.len);
+ break;
+ case USER_TINY_INT:
+ params->type.sql = SQL_TINYINT;
+ params->type.c = SQL_C_SLONG;
+ params->type.len = sizeof(SQLINTEGER);
+ params->type.col_size = COL_SQL_TINYINT;
+ params->values.integer =
+ (SQLINTEGER*)safe_malloc(num_param_values * params->type.len);
+ break;
+ case USER_DECIMAL:
+ case USER_NMERIC:
+ if(user_type == USER_NMERIC) {
+ params->type.sql = SQL_NUMERIC;
+ } else {
+ params->type.sql = SQL_DECIMAL;
+ }
+ ei_decode_long(buffer, index, &precision);
+ ei_decode_long(buffer, index, &scale);
+ map_dec_num_2_c_column(&params->type, (int)precision, (int)scale);
+ if( params->type.c == SQL_C_SLONG) {
+ params->values.integer =
+ (SQLINTEGER *)safe_malloc(num_param_values * params->type.len);
+ } else if( params->type.c == SQL_C_DOUBLE) {
+ params->values.floating =
+ (double *)safe_malloc(num_param_values * params->type.len);
+ } else if(params->type.c == SQL_C_CHAR) {
+ params->type.strlen_or_indptr_array
+ = (SQLLEN*)safe_malloc(num_param_values * sizeof(SQLINTEGER));
+ params->values.string =
+ (byte *)safe_malloc(num_param_values *
+ sizeof(byte)* params->type.len);
+ }
+ break;
+ case USER_CHAR:
+ case USER_VARCHAR:
+ if(user_type == USER_CHAR) {
+ params->type.sql = SQL_CHAR;
+ } else {
+ params->type.sql = SQL_VARCHAR;
+ }
+ ei_decode_long(buffer, index, &length);
+ /* Max string length + string terminator */
+ params->type.len = length+1;
+ params->type.c = SQL_C_CHAR;
+ params->type.col_size = (SQLUINTEGER)length;
+ params->type.strlen_or_indptr_array =
+ (SQLLEN*)safe_malloc(num_param_values * sizeof(SQLINTEGER));
+ params->values.string =
+ (byte *)safe_malloc(num_param_values *
+ sizeof(byte)* params->type.len);
+
+ break;
+ case USER_FLOAT:
+ params->type.sql = SQL_FLOAT;
+ params->type.c = SQL_C_DOUBLE;
+ params->type.len = sizeof(double);
+ ei_decode_long(buffer, index, &length);
+ params->type.col_size = (SQLUINTEGER)length;
+ params->values.floating =
+ (double *)safe_malloc(num_param_values * params->type.len);
+ break;
+ case USER_REAL:
+ params->type.sql = SQL_REAL;
+ params->type.c = SQL_C_DOUBLE;
+ params->type.len = sizeof(double);
+ params->type.col_size = COL_SQL_REAL;
+ params->values.floating =
+ (double *)safe_malloc(num_param_values * params->type.len);
+ break;
+ case USER_DOUBLE:
+ params->type.sql = SQL_DOUBLE;
+ params->type.c = SQL_C_DOUBLE;
+ params->type.len = sizeof(double);
+ params->type.col_size = COL_SQL_DOUBLE;
+ params->values.floating =
+ (double *)safe_malloc(num_param_values * params->type.len);
+ break;
+ case USER_BOOLEAN:
+ params->type.sql = SQL_BIT;
+ params->type.c = SQL_C_BIT;
+ params->type.len = sizeof(Boolean);
+ params->type.col_size = params->type.len;
+ params->values.bool =
+ (Boolean *)safe_malloc(num_param_values * params->type.len);
+ break;
+ }
+ params->offset = 0;
+
+ ei_decode_long(buffer, index, &in_or_out);
+ switch((in_or_out_type)in_or_out){
+ case(ERL_ODBC_OUT):
+ out_params(state) = TRUE;
+ params->input_output_type = SQL_PARAM_OUTPUT; break;
+ case(ERL_ODBC_INOUT):
+ out_params(state) = TRUE;
+ params->input_output_type = SQL_PARAM_INPUT_OUTPUT; break;
+ case(ERL_ODBC_IN):
+ default:
+ params->input_output_type = SQL_PARAM_INPUT; break;
+ }
+
+}
+
+static void init_param_statement(int cols, int num_param_values,
+ db_state *state, param_status *status)
+{
+ int i;
+
+ status -> param_status_array =
+ (SQLUSMALLINT *)safe_malloc(num_param_values * sizeof(SQLUSMALLINT));
+
+ for(i=0; i<num_param_values; i++) {
+ status -> param_status_array[i] = SQL_PARAM_PROCEED;
+ }
+
+ status -> params_processed = 0;
+
+ if(!sql_success(SQLAllocHandle(SQL_HANDLE_STMT,
+ connection_handle(state),
+ &statement_handle(state)))) {
+ DO_EXIT(EXIT_ALLOC);
+ }
+
+ if(num_param_values <= 1) return;
+
+ if(!sql_success(SQLSetStmtAttr(statement_handle(state),
+ SQL_ATTR_PARAM_BIND_TYPE,
+ SQL_PARAM_BIND_BY_COLUMN, 0))) {
+ DO_EXIT(EXIT_PARAM_ARRAY);
+ }
+
+ /* Note the (int *) cast is correct as the API function SQLSetStmtAttr
+ takes either an interger or a pointer depending on the attribute */
+ if(!sql_success(SQLSetStmtAttr(statement_handle(state),
+ SQL_ATTR_PARAMSET_SIZE,
+ (int *)num_param_values,
+ 0))) {
+ DO_EXIT(EXIT_PARAM_ARRAY);
+ }
+
+ if(!sql_success(SQLSetStmtAttr(statement_handle(state),
+ SQL_ATTR_PARAM_STATUS_PTR,
+ (status -> param_status_array), 0))) {
+ DO_EXIT(EXIT_PARAM_ARRAY);
+ }
+
+ if(!sql_success(SQLSetStmtAttr(statement_handle(state),
+ SQL_ATTR_PARAMS_PROCESSED_PTR,
+ &(status -> params_processed), 0))) {
+ DO_EXIT(EXIT_PARAM_ARRAY);
+ }
+}
+
+static void map_dec_num_2_c_column(col_type *type, int precision, int scale)
+{
+ type -> col_size = (SQLINTEGER)precision;
+ type -> decimal_digits = (SQLSMALLINT)scale;
+
+ if(precision >= 0 && precision <= 4 && scale == 0) {
+ type->len = sizeof(SQLINTEGER);
+ type->c = SQL_C_SLONG;
+ } else if(precision >= 5 && precision <= 9 && scale == 0) {
+ type->len = sizeof(SQLINTEGER);
+ type->c = SQL_C_SLONG;
+ } else if((precision >= 10 && precision <= 15 && scale == 0)
+ || (precision <= 15 && scale > 0)) {
+ type->len = sizeof(double);
+ type->c = SQL_C_DOUBLE;
+ } else {
+ type->len = DEC_NUM_LENGTH;
+ type->c = SQL_C_CHAR;
+ }
+}
+
+/* Description: Transform SQL columntype to C columntype. Returns a dummy
+ db_result_msg with length 0 on success and an errormessage otherwise.*/
+static db_result_msg map_sql_2_c_column(db_column* column)
+{
+ db_result_msg msg;
+
+ msg = encode_empty_message();
+
+ switch(column -> type.sql) {
+ case SQL_CHAR:
+ case SQL_VARCHAR:
+ case SQL_BINARY:
+ case SQL_LONGVARCHAR:
+ case SQL_VARBINARY:
+ case SQL_LONGVARBINARY:
+ column -> type.len = (column -> type.col_size) +
+ /* Make place for NULL termination */
+ sizeof(byte);
+ column -> type.c = SQL_C_CHAR;
+ column -> type.strlen_or_indptr = SQL_NTS;
+ break;
+ case SQL_NUMERIC:
+ case SQL_DECIMAL:
+ map_dec_num_2_c_column(&(column -> type), column -> type.col_size,
+ column -> type.decimal_digits);
+ column -> type.strlen_or_indptr = (SQLINTEGER)NULL;
+ break;
+ case SQL_TINYINT:
+ case SQL_INTEGER:
+ case SQL_SMALLINT:
+ column -> type.len = sizeof(SQLINTEGER);
+ column -> type.c = SQL_C_SLONG;
+ column -> type.strlen_or_indptr = (SQLINTEGER)NULL;
+ break;
+ case SQL_REAL:
+ case SQL_FLOAT:
+ case SQL_DOUBLE:
+ column -> type.len = sizeof(double);
+ column -> type.c = SQL_C_DOUBLE;
+ column -> type.strlen_or_indptr = (SQLINTEGER)NULL;
+ break;
+ case SQL_TYPE_DATE:
+ case SQL_TYPE_TIME:
+ case SQL_TYPE_TIMESTAMP:
+ column -> type.len = (column -> type.col_size) +
+ sizeof(byte);
+ column -> type.c = SQL_C_CHAR;
+ column -> type.strlen_or_indptr = SQL_NTS;
+ break;
+ case SQL_BIGINT:
+ column -> type.len = DEC_NUM_LENGTH;
+ column -> type.c = SQL_C_CHAR;
+ column -> type.strlen_or_indptr = (SQLINTEGER)NULL;
+ break;
+ case SQL_BIT:
+ column -> type.len = sizeof(byte);
+ column -> type.c = SQL_C_BIT;
+ column -> type.strlen_or_indptr = (SQLINTEGER)NULL;
+ break;
+ case SQL_UNKNOWN_TYPE:
+ msg = encode_error_message("Unknown column type");
+ break;
+ default:
+ msg = encode_error_message("Column type not supported");
+ break;
+ }
+ return msg;
+}
+
+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;
+ long dummy;
+ void *Values;
+ param_array *params;
+
+ params = (param_array *)safe_malloc(cols * sizeof(param_array));
+
+ for (i = 0; i < cols; i++) {
+
+ ei_get_type(buffer, index, &erl_type, &size);
+
+ if(erl_type == ERL_NIL_EXT) {
+ /* End of previous list of column values when i > 0 */
+ ei_decode_list_header(buffer, index, &size);
+ }
+
+ ei_decode_tuple_header(buffer, index, &size);
+
+ init_param_column(&params[i], buffer, index, num_param_values, state);
+
+ ei_decode_list_header(buffer, index, &size);
+
+ if(params[i].type.c == SQL_C_SLONG) {
+ /* Get rid of the dummy value 256 that is added as the first value
+ of all integer parameter value lists. This is to avoid that the
+ list will be encoded as a string if all values are less
+ than 256 */
+ ei_decode_long(buffer, index, &dummy);
+ }
+
+ for (j = 0; j < num_param_values; j++) {
+ if(!decode_params(buffer, index, &params, i, j)) {
+ /* An input parameter was not of the expected type */
+ free_params(&params, i);
+ return params;
+ }
+ }
+
+ Values = retrive_param_values(&params[i]);
+
+ if(!sql_success(
+ SQLBindParameter(statement_handle(state), i + 1,
+ params[i].input_output_type,
+ params[i].type.c,
+ params[i].type.sql,
+ params[i].type.col_size,
+ params[i].type.decimal_digits, Values,
+ params[i].type.len,
+ params[i].type.strlen_or_indptr_array))) {
+ DO_EXIT(EXIT_BIND);
+ }
+ }
+
+ return params;
+}
+
+static void * retrive_param_values(param_array *Param)
+{
+ switch(Param->type.c) {
+ case SQL_C_CHAR:
+ return (void *)Param->values.string;
+ case SQL_C_SLONG:
+ return (void *)Param->values.integer;
+ case SQL_C_DOUBLE:
+ return (void *)Param->values.floating;
+ case SQL_C_BIT:
+ return (void *)Param->values.bool;
+ default:
+ DO_EXIT(EXIT_FAILURE); /* Should not happen */
+ }
+}
+
+/* Description: More than one call to SQLGetData may be required to retrieve
+ data from a single column with binary data. SQLGetData then returns
+ SQL_SUCCESS_WITH_INFO nd the SQLSTATE will have the value 01004 (Data
+ truncated). The application can then use the same column number to
+ retrieve subsequent parts of the data until SQLGetData returns
+ SQL_SUCCESS, indicating that all data for the column has been retrieved.
+*/
+
+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;
+
+ blocklen = column.type.len;
+ outputptr = column.buffer;
+ result = SQLGetData(statement_handle(state), (SQLSMALLINT)(column_nr+1),
+ SQL_C_CHAR, outputptr,
+ blocklen, &column.type.strlen_or_indptr);
+
+ while (result == SQL_SUCCESS_WITH_INFO) {
+
+ diagnos = get_diagnos(SQL_HANDLE_STMT, statement_handle(state));
+
+ if(strcmp((char *)diagnos.sqlState, TRUNCATED) == 0) {
+ outputlen = column.type.len - 1;
+ column.type.len = outputlen + blocklen;
+ column.buffer =
+ safe_realloc((void *)column.buffer, column.type.len);
+ outputptr = column.buffer + outputlen;
+ result = SQLGetData(statement_handle(state),
+ (SQLSMALLINT)(column_nr+1), SQL_C_CHAR,
+ outputptr, blocklen,
+ &column.type.strlen_or_indptr);
+ }
+ }
+
+ if (result == SQL_SUCCESS) {
+ return column;
+ } else {
+ DO_EXIT(EXIT_BIN);
+ }
+}
+
+/* Description: Returns information about support for scrollable cursors */
+static db_result_msg retrive_scrollable_cursor_support_info(db_state *state)
+{
+ db_result_msg msg;
+ SQLUINTEGER supportMask;
+
+ ei_x_new_with_version(&dynamic_buffer(state));
+ ei_x_encode_tuple_header(&dynamic_buffer(state), 3);
+ ei_x_encode_atom(&dynamic_buffer(state), "ok");
+
+ if(use_srollable_cursors(state)) {
+
+ if(!sql_success(SQLGetInfo(connection_handle(state),
+ SQL_DYNAMIC_CURSOR_ATTRIBUTES1,
+ (SQLPOINTER)&supportMask,
+ sizeof(supportMask),
+ NULL))) {
+ DO_EXIT(EXIT_DRIVER_INFO);
+ }
+
+ if ((supportMask & SQL_CA1_ABSOLUTE)) {
+ ei_x_encode_atom(&dynamic_buffer(state), "true");
+ }
+ else {
+ ei_x_encode_atom(&dynamic_buffer(state), "false");
+ }
+
+ if ((supportMask & SQL_CA1_RELATIVE)) {
+ ei_x_encode_atom(&dynamic_buffer(state), "true");
+ }
+ else {
+ ei_x_encode_atom(&dynamic_buffer(state), "false");
+ }
+ } else { /* Scrollable cursors disabled by the user */
+ ei_x_encode_atom(&dynamic_buffer(state), "false");
+ ei_x_encode_atom(&dynamic_buffer(state), "false");
+ }
+ msg.buffer = dynamic_buffer(state).buff;
+ msg.length = dynamic_buffer(state).index;
+ msg.dyn_alloc = TRUE;
+ return msg;
+}
+
+/* ------------- Boolean functions ---------------------------------------*/
+
+/* Check if there are any more result sets */
+static db_result_msg more_result_sets(db_state *state)
+{
+ SQLRETURN result;
+ diagnos diagnos;
+ db_result_msg msg;
+
+ msg = encode_empty_message();
+ result = SQLMoreResults(statement_handle(state));
+
+ if(sql_success(result)){
+ exists_more_result_sets(state) = TRUE;
+ return msg;
+ } else if(result == SQL_NO_DATA) {
+ exists_more_result_sets(state) = FALSE;
+ return msg;
+ } else {
+ /* As we found an error we do not care about any potential more result
+ sets */
+ exists_more_result_sets(state) = FALSE;
+ diagnos = get_diagnos(SQL_HANDLE_STMT, statement_handle(state));
+ strcat((char *)diagnos.error_msg,
+ "Failed to create on of the result sets");
+ msg = encode_error_message(diagnos.error_msg);
+ return msg;
+ }
+}
+
+static Boolean sql_success(SQLRETURN result)
+{
+ return result == SQL_SUCCESS || result == SQL_SUCCESS_WITH_INFO;
+}
+
+/* ------------- Error handling functions --------------------------------*/
+
+/* Description: An ODBC function can post zero or more diagnostic records
+ each time it is called. This function loops through the current set of
+ diagnostic records scaning for error messages and the sqlstate.
+ If this function is called when no error has ocurred only the sqlState
+ field may be referenced.*/
+static diagnos get_diagnos(SQLSMALLINT handleType, SQLHANDLE handle)
+{
+ diagnos diagnos;
+ SQLINTEGER nativeError;
+ SQLSMALLINT errmsg_buffer_size, record_nr, errmsg_size;
+ int acc_errmsg_size;
+ byte *current_errmsg_pos;
+ SQLCHAR current_sql_state[SQL_STATE_SIZE];
+
+ diagnos.error_msg[0] = 0;
+
+ current_errmsg_pos = (byte *)diagnos.error_msg;
+
+ /* number bytes free in error message buffer */
+ errmsg_buffer_size = MAX_ERR_MSG - ERRMSG_HEADR_SIZE;
+ acc_errmsg_size = 0; /* number bytes used in the error message buffer */
+
+ /* Foreach diagnostic record in the current set of diagnostic records
+ the error message is obtained */
+ for(record_nr = 1; ;record_nr++) {
+ if(SQLGetDiagRec(handleType, handle, record_nr, current_sql_state,
+ &nativeError, current_errmsg_pos,
+ (SQLSMALLINT)errmsg_buffer_size, &errmsg_size)
+ != SQL_SUCCESS) {
+
+
+ break;
+ } else {
+ /* update the sqlstate in the diagnos record, because the SQLGetDiagRec
+ call succeeded */
+ memcpy(diagnos.sqlState, current_sql_state, SQL_STATE_SIZE);
+ errmsg_buffer_size = errmsg_buffer_size - errmsg_size;
+ acc_errmsg_size = acc_errmsg_size + errmsg_size;
+ current_errmsg_pos = current_errmsg_pos + errmsg_size;
+ }
+ }
+
+ if(acc_errmsg_size == 0) {
+ strcat((char *)diagnos.error_msg,
+ "No SQL-driver information available.");
+ }
+ else {
+ strcat(strcat((char *)diagnos.error_msg, " SQLSTATE IS: "),
+ (char *)diagnos.sqlState);
+ }
+ return diagnos;
+}
+
+static void str_tolower(char *str, int len)
+{
+ int i;
+
+ for(i = 0; i <= len; i++) {
+ str[i] = tolower(str[i]);
+ }
+}
diff --git a/lib/odbc/c_src/odbcserver.h b/lib/odbc/c_src/odbcserver.h
new file mode 100644
index 0000000000..ccd694a985
--- /dev/null
+++ b/lib/odbc/c_src/odbcserver.h
@@ -0,0 +1,193 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2002-2009. All Rights Reserved.
+ *
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * %CopyrightEnd%
+ *
+
+ */
+
+/* ----------------------------- CONSTANTS ------------------------------*/
+
+#define MAXCOLSIZE 8001
+#define MAX_ERR_MSG 1024
+#define ERRMSG_HEADR_SIZE 20
+#define MAX_CONN_STR_OUT 1024
+#define MAX_NAME 255
+#define TRUNCATED "01004"
+#define INFO "00000"
+#define SQL_STATE_SIZE 6
+#define TRUE 1
+#define FALSE 0
+#define WAIT_FOR_NEW_MSG 0
+#define NEW_MSG_ARRIVED 1
+#define DEC_NUM_LENGTH 50
+
+/* 0 in this case (SQL_ATTR_CONNECTION_TIMEOUT) corresponds to erlang
+ infinity. Erlang will handle all timeouts so we do not want any in the
+ portprogram. */
+#define TIME_OUT 0
+
+/* Constats defining the command protocol between the Erlang control process
+ and the port program. These constants must also be defined in the same
+ way in Erlang. */
+#define OPEN_CONNECTION 1
+#define CLOSE_CONNECTION 2
+#define COMMIT_TRANSACTION 3
+#define COMMIT 4
+#define ROLLBACK 5
+#define QUERY 6
+#define SELECT_COUNT 7
+#define SELECT_FIRST 8
+#define SELECT_LAST 9
+#define SELECT_NEXT 10
+#define SELECT_PREV 11
+#define SELECT 12
+#define SELECT_RELATIVE 13
+#define SELECT_ABSOLUTE 14
+#define SELECT_N_NEXT 15
+#define PARAM_QUERY 16
+#define DESCRIBE 17
+#define SHUTDOWN 18
+#define LENGTH_INDICATOR_SIZE 4
+#define INT_VALUE 1
+#define STR_VALUE 2
+#define ON 1
+#define OFF 2
+#define DUMMY_OFFSET 0
+
+/* EXIT CODES */
+#define EXIT_ALLOC 2
+#define EXIT_ENV 3
+#define EXIT_CONNECTION 4
+#define EXIT_FREE 5
+#define EXIT_STDIN_HEADER 6
+#define EXIT_STDIN_BODY 7
+#define EXIT_BIN 8
+#define EXIT_THREAD 9
+#define EXIT_PARAM_ARRAY 10
+#define EXIT_OLD_WINSOCK 11
+#define EXIT_SOCKET_CONNECT 12
+#define EXIT_SOCKET_SEND_HEADER 13
+#define EXIT_SOCKET_SEND_BODY 14
+#define EXIT_SOCKET_RECV_MSGSIZE 15
+#define EXIT_SOCKET_SEND_MSGSIZE 16
+#define EXIT_SOCKET_RECV_HEADER 17
+#define EXIT_SOCKET_RECV_BODY 18
+#define EXIT_COLS 19
+#define EXIT_ROWS 20
+#define EXIT_DESC 21
+#define EXIT_BIND 22
+#define EXIT_DRIVER_INFO 23
+
+/* COL_SIZE */
+#define COL_SQL_SMALLINT 5
+#define COL_SQL_INTEGER 10
+#define COL_SQL_REAL 7
+#define COL_SQL_DOUBLE 15
+#define COL_SQL_TINYINT 4
+
+/* Types of parameters given to param_query*/
+#define USER_SMALL_INT 1
+#define USER_INT 2
+#define USER_DECIMAL 3
+#define USER_NMERIC 4
+#define USER_CHAR 5
+#define USER_VARCHAR 6
+#define USER_FLOAT 7
+#define USER_REAL 8
+#define USER_DOUBLE 9
+#define USER_BOOLEAN 10
+#define USER_TINY_INT 11
+
+/*------------------------ TYPDEFS ----------------------------------*/
+
+typedef unsigned char byte;
+typedef int Boolean;
+
+typedef struct {
+ SQLSMALLINT c;
+ SQLSMALLINT sql;
+ SQLUINTEGER col_size;
+ SQLSMALLINT decimal_digits;
+ SQLLEN len;
+ SQLLEN strlen_or_indptr;
+ SQLLEN *strlen_or_indptr_array;
+} col_type;
+
+typedef struct {
+ char *buffer;
+ col_type type;
+} db_column;
+
+typedef struct {
+ int length;
+ byte *buffer;
+ Boolean dyn_alloc;
+} db_result_msg;
+
+typedef struct {
+ SQLCHAR sqlState[SQL_STATE_SIZE];
+ byte error_msg[MAX_ERR_MSG];
+} diagnos;
+
+typedef struct {
+ col_type type;
+ int offset;
+ SQLUSMALLINT input_output_type;
+ union {
+ byte *string;
+ SQLINTEGER *integer;
+ double *floating;
+ Boolean *bool;
+ }values;
+} param_array;
+
+typedef struct {
+ SQLUSMALLINT params_processed;
+ SQLUSMALLINT *param_status_array;
+} param_status;
+
+typedef struct {
+ SQLHDBC connection_handle;
+ SQLHENV environment_handle;
+ SQLHSTMT statement_handle;
+ db_column *columns;
+ int number_of_columns;
+ ei_x_buff dynamic_buffer;
+ Boolean associated_result_set;
+ Boolean use_srollable_cursors;
+ Boolean tuple_row;
+ Boolean exists_more_result_sets;
+ Boolean param_query;
+ Boolean out_params;
+} db_state;
+
+typedef enum {
+ ERL_ODBC_IN, ERL_ODBC_OUT, ERL_ODBC_INOUT
+} in_or_out_type;
+
+#define connection_handle(db_state) (db_state -> connection_handle)
+#define environment_handle(db_state) (db_state -> environment_handle)
+#define statement_handle(db_state) (db_state -> statement_handle)
+#define columns(db_state) (db_state -> columns)
+#define nr_of_columns(db_state) (db_state -> number_of_columns)
+#define dynamic_buffer(db_state) (db_state -> dynamic_buffer)
+#define associated_result_set(db_state) (db_state -> associated_result_set)
+#define use_srollable_cursors(db_state) (db_state -> use_srollable_cursors)
+#define tuple_row(db_state) (db_state -> tuple_row)
+#define exists_more_result_sets(db_state) (db_state -> exists_more_result_sets)
+#define param_query(db_state) (db_state -> param_query)
+#define out_params(db_state) (db_state -> out_params)