first commit for openGauss connect odbc code

bind.h

@@ -0,0 +1,134 @@
+/* File:			bind.h
+ *
+ * Description:		See "bind.c"
+ *
+ * Comments:		See "readme.txt" for copyright and license information.
+ *
+ */
+
+#ifndef __BIND_H__
+#define __BIND_H__
+
+#include "psqlodbc.h"
+#include "descriptor.h"
+
+/*
+ * BindInfoClass -- stores information about a bound column
+ */
+struct BindInfoClass_
+{
+	SQLLEN	buflen;			/* size of buffer */
+	char	*buffer;		/* pointer to the buffer */
+	SQLLEN	*used;			/* used space in the buffer (for strings
+					 * not counting the '\0') */
+	SQLLEN	*indicator;		/* indicator == used in many cases ? */
+	SQLSMALLINT	returntype;	/* kind of conversion to be applied when
+					 * returning (SQL_C_DEFAULT,
+					 * SQL_C_CHAR... etc) */
+	SQLSMALLINT	precision;	/* the precision for numeric or timestamp type */
+	SQLSMALLINT	scale;		/* the scale for numeric type */
+	/* area for work variables */
+	char	dummy_data;		/* currently not used */
+};
+
+/* struct for SQLGetData */
+typedef struct
+{
+	/* for BLOBs which don't hold the data */
+	struct GetBlobDataClass {
+		Int8	data_left64;	/* amount of large object data
+					   left to read before conversion */
+	} blob;
+	/* for non-BLOBs which hold the data in ttlbuf after conversion */
+	char	*ttlbuf;		/* to save the large result */
+	SQLLEN	ttlbuflen;		/* the buffer length */
+	SQLLEN	ttlbufused;		/* used length of the buffer */
+	SQLLEN	data_left;		/* amount of data left to read */
+}	GetDataClass;
+#define GETDATA_RESET(gdc) ((gdc).blob.data_left64 = (gdc).data_left = -1)
+
+/*
+ * ParameterInfoClass -- stores information about a bound parameter
+ */
+struct ParameterInfoClass_
+{
+	SQLLEN	buflen;
+	char	*buffer;
+	SQLLEN	*used;
+	SQLLEN	*indicator;	/* indicator == used in many cases ? */
+	SQLSMALLINT	CType;
+	SQLSMALLINT	precision;	/* the precision for numeric or timestamp type */
+	SQLSMALLINT	scale;		/* the scale for numeric type */
+	/* area for work variables */
+	char	data_at_exec;
+};
+
+typedef struct
+{
+	SQLLEN	*EXEC_used;	/* amount of data */
+	char	*EXEC_buffer; 	/* the data */
+	OID	lobj_oid;
+}	PutDataClass;
+
+/*
+ * ParameterImplClass -- stores implementation information about a parameter
+ */
+struct ParameterImplClass_
+{
+	pgNAME		paramName;	/* this is unavailable even in 8.1 */
+	SQLSMALLINT	paramType;
+	SQLSMALLINT	SQLType;
+	OID		PGType;
+	SQLULEN		column_size;
+	SQLSMALLINT	decimal_digits;
+	SQLSMALLINT	precision;	/* the precision for numeric or timestamp type */
+	SQLSMALLINT	scale;		/* the scale for numeric type */
+};
+
+typedef struct
+{
+	GetDataClass	fdata;
+	SQLSMALLINT	allocated;
+	GetDataClass	*gdata;
+}	GetDataInfo;
+typedef struct
+{
+	SQLSMALLINT	allocated;
+	PutDataClass	*pdata;
+}	PutDataInfo;
+
+#define	PARSE_PARAM_CAST	FALSE
+#define	EXEC_PARAM_CAST		TRUE
+#define	SIMPLE_PARAM_CAST	TRUE
+
+#define CALC_BOOKMARK_ADDR(book, offset, bind_size, index) \
+	(book->buffer + offset + \
+	(bind_size > 0 ? bind_size : (SQL_C_VARBOOKMARK == book->returntype ? book->buflen : sizeof(UInt4))) * index)
+
+/* Macros to handle pgtype of parameters */
+#define	PIC_get_pgtype(pari) ((pari).PGType)
+#define	PIC_set_pgtype(pari, type) ((pari).PGType = (type))
+#define	PIC_dsp_pgtype(conn, pari) ((pari).PGType ? (pari).PGType : sqltype_to_pgtype(conn, (pari).SQLType))
+
+void	extend_column_bindings(ARDFields *opts, int num_columns);
+void	reset_a_column_binding(ARDFields *opts, int icol);
+void	extend_parameter_bindings(APDFields *opts, int num_params);
+void	extend_iparameter_bindings(IPDFields *opts, int num_params);
+void	reset_a_parameter_binding(APDFields *opts, int ipar);
+void	reset_a_iparameter_binding(IPDFields *opts, int ipar);
+int	CountParameters(const StatementClass *stmt, Int2 *inCount, Int2 *ioCount, Int2 *outputCount);
+void	GetDataInfoInitialize(GetDataInfo *gdata);
+void	extend_getdata_info(GetDataInfo *gdata, int num_columns, BOOL shrink);
+void	reset_a_getdata_info(GetDataInfo *gdata, int icol);
+void	GDATA_unbind_cols(GetDataInfo *gdata, BOOL freeall);
+void	PutDataInfoInitialize(PutDataInfo *pdata);
+void	extend_putdata_info(PutDataInfo *pdata, int num_params, BOOL shrink);
+void	reset_a_putdata_info(PutDataInfo *pdata, int ipar);
+void	PDATA_free_params(PutDataInfo *pdata, char option);
+void	SC_param_next(const StatementClass*, int *param_number, ParameterInfoClass **, ParameterImplClass **);
+
+RETCODE       prepareParameters(StatementClass *stmt, BOOL fake_params);
+RETCODE       prepareParametersNoDesc(StatementClass *stmt, BOOL fake_params, BOOL param_cast);
+int	decideHowToPrepare(StatementClass *stmt, BOOL force);
+
+#endif