Replace old PostODBC driver with new one...

This one is based on an older PostODBC driver, rewritten and maintained by
InsightDist(?)

src/interfaces/odbc/connection.h

@@ -0,0 +1,183 @@
+
+/* File:            connection.h
+ *
+ * Description:     See "connection.c"
+ *
+ * Comments:        See "notice.txt" for copyright and license information.
+ *
+ */
+
+#ifndef __CONNECTION_H__
+#define __CONNECTION_H__
+
+#include <windows.h>
+#include <sql.h>
+#include "psqlodbc.h"
+
+typedef enum {
+    CONN_NOT_CONNECTED,      /* Connection has not been established */
+    CONN_CONNECTED,      /* Connection is up and has been established */
+    CONN_DOWN,            /* Connection is broken */
+    CONN_EXECUTING     /* the connection is currently executing a statement */
+} CONN_Status;
+
+/*	These errors have general sql error state */
+#define CONNECTION_SERVER_NOT_REACHED 1
+#define CONNECTION_MSG_TOO_LONG 3
+#define CONNECTION_COULD_NOT_SEND 4
+#define CONNECTION_NO_SUCH_DATABASE 5
+#define CONNECTION_BACKEND_CRAZY 6
+#define CONNECTION_NO_RESPONSE 7
+#define CONNECTION_SERVER_REPORTED_ERROR 8
+#define CONNECTION_COULD_NOT_RECEIVE 9
+#define CONNECTION_SERVER_REPORTED_WARNING 10
+#define CONNECTION_NEED_PASSWORD 12
+
+/*	These errors correspond to specific SQL states */
+#define CONN_INIREAD_ERROR 1
+#define CONN_OPENDB_ERROR 2
+#define CONN_STMT_ALLOC_ERROR 3
+#define CONN_IN_USE 4 
+#define CONN_UNSUPPORTED_OPTION 5
+/* Used by SetConnectoption to indicate unsupported options */
+#define CONN_INVALID_ARGUMENT_NO 6
+/* SetConnectOption: corresponds to ODBC--"S1009" */
+#define CONN_TRANSACT_IN_PROGRES 7
+#define CONN_NO_MEMORY_ERROR 8
+#define CONN_NOT_IMPLEMENTED_ERROR 9
+#define CONN_INVALID_AUTHENTICATION 10
+#define CONN_AUTH_TYPE_UNSUPPORTED 11
+
+
+/* Conn_status defines */
+#define CONN_IN_AUTOCOMMIT 0x01
+#define CONN_IN_TRANSACTION 0x02
+
+/* AutoCommit functions */
+#define CC_set_autocommit_off(x)	(x->transact_status &= ~CONN_IN_AUTOCOMMIT)
+#define CC_set_autocommit_on(x)		(x->transact_status |= CONN_IN_AUTOCOMMIT)
+#define CC_is_in_autocommit(x)		(x->transact_status & CONN_IN_AUTOCOMMIT)
+
+/* Transaction in/not functions */
+#define CC_set_in_trans(x)	(x->transact_status |= CONN_IN_TRANSACTION)
+#define CC_set_no_trans(x)	(x->transact_status &= ~CONN_IN_TRANSACTION)
+#define CC_is_in_trans(x)	(x->transact_status & CONN_IN_TRANSACTION)
+
+
+/* Authentication types */
+#define AUTH_REQ_OK			0
+#define AUTH_REQ_KRB4		1
+#define AUTH_REQ_KRB5		2
+#define AUTH_REQ_PASSWORD	3
+#define AUTH_REQ_CRYPT		4
+
+/*	Startup Packet sizes */
+#define SM_DATABASE		64
+#define SM_USER			32
+#define SM_OPTIONS		64
+#define SM_UNUSED		64
+#define SM_TTY			64
+
+/*	Old 6.2 protocol defines */
+#define NO_AUTHENTICATION	7
+#define PATH_SIZE			64
+#define ARGV_SIZE			64
+#define NAMEDATALEN			16
+
+typedef unsigned int ProtocolVersion;
+
+#define PG_PROTOCOL(major, minor)	(((major) << 16) | (minor))
+#define PG_PROTOCOL_LATEST		PG_PROTOCOL(1, 0)
+#define PG_PROTOCOL_EARLIEST	PG_PROTOCOL(0, 0)
+
+/*	This startup packet is to support latest Postgres protocol (6.3) */
+typedef struct _StartupPacket
+{
+	ProtocolVersion	protoVersion;
+	char			database[SM_DATABASE];
+	char			user[SM_USER];
+	char			options[SM_OPTIONS];
+	char			unused[SM_UNUSED];
+	char			tty[SM_TTY];
+} StartupPacket;
+
+
+/*	This startup packet is to support pre-Postgres 6.3 protocol */
+typedef struct _StartupPacket6_2
+{
+	unsigned int	authtype;
+	char			database[PATH_SIZE];
+	char			user[NAMEDATALEN];
+	char			options[ARGV_SIZE];
+	char			execfile[ARGV_SIZE];
+	char			tty[PATH_SIZE];
+} StartupPacket6_2;
+
+
+/*	Structure to hold all the connection attributes for a specific
+	connection (used for both registry and file, DSN and DRIVER)
+*/
+typedef struct {
+	char	dsn[MEDIUM_REGISTRY_LEN];
+	char	driver[MEDIUM_REGISTRY_LEN];
+	char	server[MEDIUM_REGISTRY_LEN];
+	char	database[MEDIUM_REGISTRY_LEN];
+	char	username[MEDIUM_REGISTRY_LEN];
+	char	password[MEDIUM_REGISTRY_LEN];
+	char	conn_settings[LARGE_REGISTRY_LEN];
+	char	protocol[SMALL_REGISTRY_LEN];
+	char	port[SMALL_REGISTRY_LEN];
+	char	readonly[SMALL_REGISTRY_LEN];	
+	char	focus_password;
+} ConnInfo;
+
+/*	Macro to determine is the connection using 6.2 protocol? */
+#define PROTOCOL_62(conninfo_)		(strncmp((conninfo_)->protocol, PG62, strlen(PG62)) == 0)
+
+
+/*******	The Connection handle	************/
+struct ConnectionClass_ {
+	HENV			henv;					/* environment this connection was created on */
+	char			*errormsg;
+	int				errornumber;
+	CONN_Status		status;
+	ConnInfo		connInfo;
+	StatementClass	**stmts;
+	int				num_stmts;
+	SocketClass		*sock;
+	char			transact_status;		/* Is a transaction is currently in progress */
+	char			errormsg_created;		/* has an informative error msg been created?  */
+};
+
+
+/* Accessor functions */
+#define CC_get_socket(x)	(x->sock)
+#define CC_get_database(x)	(x->connInfo.database)
+#define CC_get_server(x)	(x->connInfo.server)
+#define CC_get_DSN(x)		(x->connInfo.dsn)
+#define CC_get_username(x)	(x->connInfo.username)
+#define CC_is_readonly(x)	(x->connInfo.readonly[0] == '1')
+
+
+/*  for CC_DSN_info */
+#define CONN_DONT_OVERWRITE		0
+#define CONN_OVERWRITE			1 
+
+
+/*	prototypes */
+ConnectionClass *CC_Constructor();
+char CC_Destructor(ConnectionClass *self);
+char CC_cleanup(ConnectionClass *self);
+char CC_abort(ConnectionClass *self);
+void CC_DSN_info(ConnectionClass *self, char overwrite);
+void CC_set_defaults(ConnectionClass *self);
+char CC_connect(ConnectionClass *self, char do_password);
+char CC_add_statement(ConnectionClass *self, StatementClass *stmt);
+char CC_remove_statement(ConnectionClass *self, StatementClass *stmt);
+char CC_get_error(ConnectionClass *self, int *number, char **message);
+QResultClass *CC_send_query(ConnectionClass *self, char *query, QResultClass *result_in, char *cursor);
+void CC_clear_error(ConnectionClass *self);
+char *CC_create_errormsg(ConnectionClass *self);
+char CC_send_settings(ConnectionClass *self);
+
+#endif