vxodbc/bind.h

   1 /* File:                        bind.h
   2  *
   3  * Description:         See "bind.c"
   4  *
   5  * Comments:            See "notice.txt" for copyright and license information.
   6  *
   7  */
   8
   9 #ifndef __BIND_H__
  10 #define __BIND_H__
  11
  12 #include "psqlodbc.h"
  13 #include "descriptor.h"
  14
  15 /*
  16  * BindInfoClass -- stores information about a bound column
  17  */
  18 struct BindInfoClass_
  19 {
  20         SQLLEN  buflen;                 /* size of buffer */
  21         char    *buffer;                /* pointer to the buffer */
  22         SQLLEN  *used;                  /* used space in the buffer (for strings
  23                                          * not counting the '\0') */
  24         SQLLEN  *indicator;             /* indicator == used in many cases ? */
  25         SQLSMALLINT     returntype;     /* kind of conversion to be applied when
  26                                          * returning (SQL_C_DEFAULT,
  27                                          * SQL_C_CHAR... etc) */
  28         SQLSMALLINT     precision;      /* the precision for numeric or timestamp type */
  29         SQLSMALLINT     scale;          /* the scale for numeric type */
  30         /* area for work variables */
  31         char    dummy_data;             /* currently not used */
  32 };
  33 typedef struct
  34 {
  35         char    *ttlbuf;                /* to save the large result */
  36         SQLLEN  ttlbuflen;              /* the buffer length */
  37         SQLLEN  ttlbufused;             /* used length of the buffer */
  38         SQLLEN  data_left;              /* amount of data left to read
  39                                          * (SQLGetData) */
  40 }       GetDataClass;
  41
  42 /*
  43  * ParameterInfoClass -- stores information about a bound parameter
  44  */
  45 struct ParameterInfoClass_
  46 {
  47         SQLLEN  buflen;
  48         char    *buffer;
  49         SQLLEN  *used;
  50         SQLLEN  *indicator;     /* indicator == used in many cases ? */
  51         SQLSMALLINT     CType;
  52         SQLSMALLINT     precision;      /* the precision for numeric or timestamp type */
  53         SQLSMALLINT     scale;          /* the scale for numeric type */
  54         /* area for work variables */
  55         char    data_at_exec;
  56 };
  57
  58 typedef struct
  59 {
  60         SQLLEN  *EXEC_used;     /* amount of data */
  61         char    *EXEC_buffer;   /* the data */
  62 }       PutDataClass;
  63
  64 /*
  65  * ParameterImplClass -- stores implemntation information about a parameter
  66  */
  67 struct ParameterImplClass_
  68 {
  69         pgNAME          paramName;      /* this is unavailable even in 8.1 */
  70         SQLSMALLINT     paramType;
  71         SQLSMALLINT     SQLType;
  72         OID             PGType;
  73         SQLULEN         column_size;
  74         SQLSMALLINT     decimal_digits;
  75         SQLSMALLINT     precision;      /* the precision for numeric or timestamp type */
  76         SQLSMALLINT     scale;          /* the scale for numeric type */
  77 };
  78
  79 typedef struct
  80 {
  81         GetDataClass    fdata;
  82         SQLSMALLINT     allocated;
  83         GetDataClass    *gdata;
  84 }       GetDataInfo;
  85
  86 void    extend_column_bindings(ARDFields *opts, int num_columns);
  87 void    reset_a_column_binding(ARDFields *opts, int icol);
  88 int     CountParameters(const StatementClass *stmt, Int2 *inCount, Int2 *ioCount, Int2 *outputCount);
  89 void    GetDataInfoInitialize(GetDataInfo *gdata);
  90 void    extend_getdata_info(GetDataInfo *gdata, int num_columns, BOOL shrink);
  91 void    reset_a_getdata_info(GetDataInfo *gdata, int icol);
  92 void    GDATA_unbind_cols(GetDataInfo *gdata, BOOL freeall);
  93
  94 #endif