db_access.h

/*************************************************************************\
* Copyright (c) 2002 The University of Chicago, as Operator of Argonne
* National Laboratory.
* Copyright (c) 2002 The Regents of the University of California, as
* Operator of Los Alamos National Laboratory.
* SPDX-License-Identifier: EPICS
* EPICS BASE is distributed subject to a Software License Agreement found
* in file LICENSE that is included with this distribution.
\*************************************************************************/
/* base/include/db_access.h */
/* Author: Bob Dalesio
 * Date: 4-4-88
*/
 
#ifndef INC_db_access_H
#define INC_db_access_H
 
#include <stddef.h>
 
#include "epicsTypes.h"
#include "epicsTime.h"
 
#include "libCaAPI.h"
 
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define MAX_UNITS_SIZE 8
#define MAX_ENUM_STRING_SIZE 26
#define MAX_ENUM_STATES 16
 
/*
 * architecture independent types
 *
 * (so far this is sufficient for all archs we have ported to)
 */
typedef epicsOldString dbr_string_t;
typedef epicsUInt8 dbr_char_t;
typedef epicsInt16 dbr_short_t;
typedef epicsUInt16 dbr_ushort_t;
typedef epicsInt16 dbr_int_t;
typedef epicsUInt16 dbr_enum_t;
typedef epicsInt32 dbr_long_t;
typedef epicsUInt32 dbr_ulong_t;
typedef epicsFloat32 dbr_float_t;
typedef epicsFloat64 dbr_double_t;
typedef epicsUInt16 dbr_put_ackt_t;
typedef epicsUInt16 dbr_put_acks_t;
typedef epicsOldString dbr_stsack_string_t;
typedef epicsOldString dbr_class_name_t;
 
#ifndef db_accessHFORdb_accessC
/* database field types */
#define DBF_STRING 0
#define DBF_INT 1
#define DBF_SHORT 1
#define DBF_FLOAT 2
#define DBF_ENUM 3
#define DBF_CHAR 4
#define DBF_LONG 5
#define DBF_DOUBLE 6
#define DBF_NO_ACCESS 7
#define LAST_TYPE DBF_DOUBLE
#define VALID_DB_FIELD(x) ((x >= 0) && (x <= LAST_TYPE))
#define INVALID_DB_FIELD(x) ((x < 0) || (x > LAST_TYPE))
 
/* data request buffer types */
#define DBR_STRING DBF_STRING
#define DBR_INT DBF_INT
#define DBR_SHORT DBF_INT
#define DBR_FLOAT DBF_FLOAT
#define DBR_ENUM DBF_ENUM
#define DBR_CHAR DBF_CHAR
#define DBR_LONG DBF_LONG
#define DBR_DOUBLE DBF_DOUBLE
#define DBR_STS_STRING 7
#define DBR_STS_SHORT 8
#define DBR_STS_INT DBR_STS_SHORT
#define DBR_STS_FLOAT 9
#define DBR_STS_ENUM 10
#define DBR_STS_CHAR 11
#define DBR_STS_LONG 12
#define DBR_STS_DOUBLE 13
#define DBR_TIME_STRING 14
#define DBR_TIME_INT 15
#define DBR_TIME_SHORT 15
#define DBR_TIME_FLOAT 16
#define DBR_TIME_ENUM 17
#define DBR_TIME_CHAR 18
#define DBR_TIME_LONG 19
#define DBR_TIME_DOUBLE 20
#define DBR_GR_STRING 21
#define DBR_GR_SHORT 22
#define DBR_GR_INT DBR_GR_SHORT
#define DBR_GR_FLOAT 23
#define DBR_GR_ENUM 24
#define DBR_GR_CHAR 25
#define DBR_GR_LONG 26
#define DBR_GR_DOUBLE 27
#define DBR_CTRL_STRING 28
#define DBR_CTRL_SHORT 29
#define DBR_CTRL_INT DBR_CTRL_SHORT
#define DBR_CTRL_FLOAT 30
#define DBR_CTRL_ENUM 31
#define DBR_CTRL_CHAR 32
#define DBR_CTRL_LONG 33
#define DBR_CTRL_DOUBLE 34
#define DBR_PUT_ACKT DBR_CTRL_DOUBLE + 1
#define DBR_PUT_ACKS DBR_PUT_ACKT + 1
#define DBR_STSACK_STRING DBR_PUT_ACKS + 1
#define DBR_CLASS_NAME DBR_STSACK_STRING + 1
#define LAST_BUFFER_TYPE DBR_CLASS_NAME
#define VALID_DB_REQ(x) ((x >= 0) && (x <= LAST_BUFFER_TYPE))
#define INVALID_DB_REQ(x) ((x < 0) || (x > LAST_BUFFER_TYPE))
 
/*
 * The enumeration "epicsType" is an index to this array
 * of type DBR types. In some cases we select the a
 * larger type to avoid loss of information
 */
LIBCA_API extern const int epicsTypeToDBR_XXXX [lastEpicsType+1];
 
/*
 * The DBR_XXXX types are indices into this array
 */
LIBCA_API extern const epicsType DBR_XXXXToEpicsType [LAST_BUFFER_TYPE+1];
 
/* values returned for each field type
 * DBR_STRING returns a NULL terminated string
 * DBR_SHORT returns an unsigned short
 * DBR_INT returns an unsigned short
 * DBR_FLOAT returns an IEEE floating point value
 * DBR_ENUM returns an unsigned short which is the enum item
 * DBR_CHAR returns an unsigned char
 * DBR_LONG returns an unsigned long
 * DBR_DOUBLE returns a double precision floating point number
 * DBR_STS_STRING returns a string status structure (dbr_sts_string)
 * DBR_STS_SHORT returns a short status structure (dbr_sts_short)
 * DBR_STS_INT returns a short status structure (dbr_sts_int)
 * DBR_STS_FLOAT returns a float status structure (dbr_sts_float)
 * DBR_STS_ENUM returns an enum status structure (dbr_sts_enum)
 * DBR_STS_CHAR returns a char status structure (dbr_sts_char)
 * DBR_STS_LONG returns a long status structure (dbr_sts_long)
 * DBR_STS_DOUBLE returns a double status structure (dbr_sts_double)
 * DBR_TIME_STRING returns a string time structure (dbr_time_string)
 * DBR_TIME_SHORT returns a short time structure (dbr_time_short)
 * DBR_TIME_INT returns a short time structure (dbr_time_short)
 * DBR_TIME_FLOAT returns a float time structure (dbr_time_float)
 * DBR_TIME_ENUM returns an enum time structure (dbr_time_enum)
 * DBR_TIME_CHAR returns a char time structure (dbr_time_char)
 * DBR_TIME_LONG returns a long time structure (dbr_time_long)
 * DBR_TIME_DOUBLE returns a double time structure (dbr_time_double)
 * DBR_GR_STRING returns a graphic string structure (dbr_gr_string)
 * DBR_GR_SHORT returns a graphic short structure (dbr_gr_short)
 * DBR_GR_INT returns a graphic short structure (dbr_gr_int)
 * DBR_GR_FLOAT returns a graphic float structure (dbr_gr_float)
 * DBR_GR_ENUM returns a graphic enum structure (dbr_gr_enum)
 * DBR_GR_CHAR returns a graphic char structure (dbr_gr_char)
 * DBR_GR_LONG returns a graphic long structure (dbr_gr_long)
 * DBR_GR_DOUBLE returns a graphic double structure (dbr_gr_double)
 * DBR_CTRL_STRING returns a control string structure (dbr_ctrl_int)
 * DBR_CTRL_SHORT returns a control short structure (dbr_ctrl_short)
 * DBR_CTRL_INT returns a control short structure (dbr_ctrl_int)
 * DBR_CTRL_FLOAT returns a control float structure (dbr_ctrl_float)
 * DBR_CTRL_ENUM returns a control enum structure (dbr_ctrl_enum)
 * DBR_CTRL_CHAR returns a control char structure (dbr_ctrl_char)
 * DBR_CTRL_LONG returns a control long structure (dbr_ctrl_long)
 * DBR_CTRL_DOUBLE returns a control double structure (dbr_ctrl_double)
 */
#endif /*db_accessHFORdb_accessC*/
␌
/* VALUES WITH STATUS STRUCTURES */
 
/* structure for a string status field */
struct dbr_sts_string {
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 dbr_string_t value; /* current value */
};
 
/* structure for a string status and ack field */
struct dbr_stsack_string{
 dbr_ushort_t status; /* status of value */
 dbr_ushort_t severity; /* severity of alarm */
 dbr_ushort_t ackt; /* ack transient? */
 dbr_ushort_t acks; /* ack severity */
 dbr_string_t value; /* current value */
};
/* structure for an short status field */
struct dbr_sts_int{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 dbr_short_t value; /* current value */
};
struct dbr_sts_short{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 dbr_short_t value; /* current value */
};
 
/* structure for a float status field */
struct dbr_sts_float{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 dbr_float_t value; /* current value */
};
 
/* structure for a enum status field */
struct dbr_sts_enum{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 dbr_enum_t value; /* current value */
};
 
/* structure for a char status field */
struct dbr_sts_char{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 dbr_char_t RISC_pad; /* RISC alignment */
 dbr_char_t value; /* current value */
};
 
/* structure for a long status field */
struct dbr_sts_long{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 dbr_long_t value; /* current value */
};
 
/* structure for a double status field */
struct dbr_sts_double{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 dbr_long_t RISC_pad; /* RISC alignment */
 dbr_double_t value; /* current value */
};
␌
/* VALUES WITH STATUS AND TIME STRUCTURES */
 
/* structure for a string time field */
struct dbr_time_string{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 epicsTimeStamp stamp; /* time stamp */
 dbr_string_t value; /* current value */
};
 
/* structure for an short time field */
struct dbr_time_short{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 epicsTimeStamp stamp; /* time stamp */
 dbr_short_t RISC_pad; /* RISC alignment */
 dbr_short_t value; /* current value */
};
 
/* structure for a float time field */
struct dbr_time_float{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 epicsTimeStamp stamp; /* time stamp */
 dbr_float_t value; /* current value */
};
 
/* structure for a enum time field */
struct dbr_time_enum{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 epicsTimeStamp stamp; /* time stamp */
 dbr_short_t RISC_pad; /* RISC alignment */
 dbr_enum_t value; /* current value */
};
 
/* structure for a char time field */
struct dbr_time_char{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 epicsTimeStamp stamp; /* time stamp */
 dbr_short_t RISC_pad0; /* RISC alignment */
 dbr_char_t RISC_pad1; /* RISC alignment */
 dbr_char_t value; /* current value */
};
 
/* structure for a long time field */
struct dbr_time_long{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 epicsTimeStamp stamp; /* time stamp */
 dbr_long_t value; /* current value */
};
 
/* structure for a double time field */
struct dbr_time_double{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 epicsTimeStamp stamp; /* time stamp */
 dbr_long_t RISC_pad; /* RISC alignment */
 dbr_double_t value; /* current value */
};
␌
/* VALUES WITH STATUS AND GRAPHIC STRUCTURES */
 
/* structure for a graphic string */
 /* not implemented; use struct_dbr_sts_string */
 
/* structure for a graphic short field */
struct dbr_gr_int{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 char units[MAX_UNITS_SIZE]; /* units of value */
 dbr_short_t upper_disp_limit; /* upper limit of graph */
 dbr_short_t lower_disp_limit; /* lower limit of graph */
 dbr_short_t upper_alarm_limit;
 dbr_short_t upper_warning_limit;
 dbr_short_t lower_warning_limit;
 dbr_short_t lower_alarm_limit;
 dbr_short_t value; /* current value */
};
struct dbr_gr_short{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 char units[MAX_UNITS_SIZE]; /* units of value */
 dbr_short_t upper_disp_limit; /* upper limit of graph */
 dbr_short_t lower_disp_limit; /* lower limit of graph */
 dbr_short_t upper_alarm_limit;
 dbr_short_t upper_warning_limit;
 dbr_short_t lower_warning_limit;
 dbr_short_t lower_alarm_limit;
 dbr_short_t value; /* current value */
};
 
/* structure for a graphic floating point field */
struct dbr_gr_float{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 dbr_short_t precision; /* number of decimal places */
 dbr_short_t RISC_pad0; /* RISC alignment */
 char units[MAX_UNITS_SIZE]; /* units of value */
 dbr_float_t upper_disp_limit; /* upper limit of graph */
 dbr_float_t lower_disp_limit; /* lower limit of graph */
 dbr_float_t upper_alarm_limit;
 dbr_float_t upper_warning_limit;
 dbr_float_t lower_warning_limit;
 dbr_float_t lower_alarm_limit;
 dbr_float_t value; /* current value */
};
 
/* structure for a graphic enumeration field */
struct dbr_gr_enum{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 dbr_short_t no_str; /* number of strings */
 char strs[MAX_ENUM_STATES][MAX_ENUM_STRING_SIZE];
 /* state strings */
 dbr_enum_t value; /* current value */
};
 
/* structure for a graphic char field */
struct dbr_gr_char{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 char units[MAX_UNITS_SIZE]; /* units of value */
 dbr_char_t upper_disp_limit; /* upper limit of graph */
 dbr_char_t lower_disp_limit; /* lower limit of graph */
 dbr_char_t upper_alarm_limit;
 dbr_char_t upper_warning_limit;
 dbr_char_t lower_warning_limit;
 dbr_char_t lower_alarm_limit;
 dbr_char_t RISC_pad; /* RISC alignment */
 dbr_char_t value; /* current value */
};
 
/* structure for a graphic long field */
struct dbr_gr_long{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 char units[MAX_UNITS_SIZE]; /* units of value */
 dbr_long_t upper_disp_limit; /* upper limit of graph */
 dbr_long_t lower_disp_limit; /* lower limit of graph */
 dbr_long_t upper_alarm_limit;
 dbr_long_t upper_warning_limit;
 dbr_long_t lower_warning_limit;
 dbr_long_t lower_alarm_limit;
 dbr_long_t value; /* current value */
};
 
/* structure for a graphic double field */
struct dbr_gr_double{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 dbr_short_t precision; /* number of decimal places */
 dbr_short_t RISC_pad0; /* RISC alignment */
 char units[MAX_UNITS_SIZE]; /* units of value */
 dbr_double_t upper_disp_limit; /* upper limit of graph */
 dbr_double_t lower_disp_limit; /* lower limit of graph */
 dbr_double_t upper_alarm_limit;
 dbr_double_t upper_warning_limit;
 dbr_double_t lower_warning_limit;
 dbr_double_t lower_alarm_limit;
 dbr_double_t value; /* current value */
};
␌
/* VALUES WITH STATUS, GRAPHIC and CONTROL STRUCTURES */
 
/* structure for a control string */
 /* not implemented; use struct_dbr_sts_string */
 
/* structure for a control integer */
struct dbr_ctrl_int{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 char units[MAX_UNITS_SIZE]; /* units of value */
 dbr_short_t upper_disp_limit; /* upper limit of graph */
 dbr_short_t lower_disp_limit; /* lower limit of graph */
 dbr_short_t upper_alarm_limit;
 dbr_short_t upper_warning_limit;
 dbr_short_t lower_warning_limit;
 dbr_short_t lower_alarm_limit;
 dbr_short_t upper_ctrl_limit; /* upper control limit */
 dbr_short_t lower_ctrl_limit; /* lower control limit */
 dbr_short_t value; /* current value */
};
struct dbr_ctrl_short{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 char units[MAX_UNITS_SIZE]; /* units of value */
 dbr_short_t upper_disp_limit; /* upper limit of graph */
 dbr_short_t lower_disp_limit; /* lower limit of graph */
 dbr_short_t upper_alarm_limit;
 dbr_short_t upper_warning_limit;
 dbr_short_t lower_warning_limit;
 dbr_short_t lower_alarm_limit;
 dbr_short_t upper_ctrl_limit; /* upper control limit */
 dbr_short_t lower_ctrl_limit; /* lower control limit */
 dbr_short_t value; /* current value */
};
 
/* structure for a control floating point field */
struct dbr_ctrl_float{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 dbr_short_t precision; /* number of decimal places */
 dbr_short_t RISC_pad; /* RISC alignment */
 char units[MAX_UNITS_SIZE]; /* units of value */
 dbr_float_t upper_disp_limit; /* upper limit of graph */
 dbr_float_t lower_disp_limit; /* lower limit of graph */
 dbr_float_t upper_alarm_limit;
 dbr_float_t upper_warning_limit;
 dbr_float_t lower_warning_limit;
 dbr_float_t lower_alarm_limit;
 dbr_float_t upper_ctrl_limit; /* upper control limit */
 dbr_float_t lower_ctrl_limit; /* lower control limit */
 dbr_float_t value; /* current value */
};
 
/* structure for a control enumeration field */
struct dbr_ctrl_enum{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 dbr_short_t no_str; /* number of strings */
 char strs[MAX_ENUM_STATES][MAX_ENUM_STRING_SIZE];
 /* state strings */
 dbr_enum_t value; /* current value */
};
 
/* structure for a control char field */
struct dbr_ctrl_char{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 char units[MAX_UNITS_SIZE]; /* units of value */
 dbr_char_t upper_disp_limit; /* upper limit of graph */
 dbr_char_t lower_disp_limit; /* lower limit of graph */
 dbr_char_t upper_alarm_limit;
 dbr_char_t upper_warning_limit;
 dbr_char_t lower_warning_limit;
 dbr_char_t lower_alarm_limit;
 dbr_char_t upper_ctrl_limit; /* upper control limit */
 dbr_char_t lower_ctrl_limit; /* lower control limit */
 dbr_char_t RISC_pad; /* RISC alignment */
 dbr_char_t value; /* current value */
};
 
/* structure for a control long field */
struct dbr_ctrl_long{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 char units[MAX_UNITS_SIZE]; /* units of value */
 dbr_long_t upper_disp_limit; /* upper limit of graph */
 dbr_long_t lower_disp_limit; /* lower limit of graph */
 dbr_long_t upper_alarm_limit;
 dbr_long_t upper_warning_limit;
 dbr_long_t lower_warning_limit;
 dbr_long_t lower_alarm_limit;
 dbr_long_t upper_ctrl_limit; /* upper control limit */
 dbr_long_t lower_ctrl_limit; /* lower control limit */
 dbr_long_t value; /* current value */
};
 
/* structure for a control double field */
struct dbr_ctrl_double{
 dbr_short_t status; /* status of value */
 dbr_short_t severity; /* severity of alarm */
 dbr_short_t precision; /* number of decimal places */
 dbr_short_t RISC_pad0; /* RISC alignment */
 char units[MAX_UNITS_SIZE]; /* units of value */
 dbr_double_t upper_disp_limit; /* upper limit of graph */
 dbr_double_t lower_disp_limit; /* lower limit of graph */
 dbr_double_t upper_alarm_limit;
 dbr_double_t upper_warning_limit;
 dbr_double_t lower_warning_limit;
 dbr_double_t lower_alarm_limit;
 dbr_double_t upper_ctrl_limit; /* upper control limit */
 dbr_double_t lower_ctrl_limit; /* lower control limit */
 dbr_double_t value; /* current value */
};
 
#define dbr_size_n(TYPE,COUNT)\
((unsigned)((COUNT)<0?dbr_size[TYPE]:dbr_size[TYPE]+((COUNT)-1)*dbr_value_size[TYPE]))
 
/* size for each type - array indexed by the DBR_ type code */
LIBCA_API extern const unsigned short dbr_size[];
 
/* size for each type's value - array indexed by the DBR_ type code */
LIBCA_API extern const unsigned short dbr_value_size[];
 
#ifndef db_accessHFORdb_accessC
/* class for each type's value */
enum dbr_value_class {
 dbr_class_int,
 dbr_class_float,
 dbr_class_string,
 dbr_class_max};
 
LIBCA_API extern const enum dbr_value_class dbr_value_class[LAST_BUFFER_TYPE+1];
 
/*
 * ptr to value given a pointer to the structure and the DBR type
 */
#define dbr_value_ptr(PDBR, DBR_TYPE) \
((void *)(((char *)PDBR)+dbr_value_offset[DBR_TYPE]))
 
/*
 * ptr to value given a pointer to the structure and the structure declaration
 */
#define dbr_value_ptr_from_structure(PDBR, STRUCTURE)\
((void *)(((char *)PDBR)+BYTE_OS(STRUCTURE, value)))
 
LIBCA_API extern const unsigned short dbr_value_offset[LAST_BUFFER_TYPE+1];
 
␌
/* union for each fetch buffers */
union db_access_val{
 dbr_string_t strval; /* string max size */
 dbr_short_t shrtval; /* short */
 dbr_short_t intval; /* short */
 dbr_float_t fltval; /* IEEE Float */
 dbr_enum_t enmval; /* item number */
 dbr_char_t charval; /* character */
 dbr_long_t longval; /* long */
 dbr_double_t doubleval; /* double */
 struct dbr_sts_string sstrval; /* string field with status */
 struct dbr_sts_short sshrtval; /* short field with status */
 struct dbr_sts_float sfltval; /* float field with status */
 struct dbr_sts_enum senmval; /* item number with status */
 struct dbr_sts_char schrval; /* char field with status */
 struct dbr_sts_long slngval; /* long field with status */
 struct dbr_sts_double sdblval; /* double field with time */
 struct dbr_time_string tstrval; /* string field with time */
 struct dbr_time_short tshrtval; /* short field with time */
 struct dbr_time_float tfltval; /* float field with time */
 struct dbr_time_enum tenmval; /* item number with time */
 struct dbr_time_char tchrval; /* char field with time */
 struct dbr_time_long tlngval; /* long field with time */
 struct dbr_time_double tdblval; /* double field with time */
 struct dbr_sts_string gstrval; /* graphic string info */
 struct dbr_gr_short gshrtval; /* graphic short info */
 struct dbr_gr_float gfltval; /* graphic float info */
 struct dbr_gr_enum genmval; /* graphic item info */
 struct dbr_gr_char gchrval; /* graphic char info */
 struct dbr_gr_long glngval; /* graphic long info */
 struct dbr_gr_double gdblval; /* graphic double info */
 struct dbr_sts_string cstrval; /* control string info */
 struct dbr_ctrl_short cshrtval; /* control short info */
 struct dbr_ctrl_float cfltval; /* control float info */
 struct dbr_ctrl_enum cenmval; /* control item info */
 struct dbr_ctrl_char cchrval; /* control char info */
 struct dbr_ctrl_long clngval; /* control long info */
 struct dbr_ctrl_double cdblval; /* control double info */
 dbr_put_ackt_t putackt; /* item number */
 dbr_put_acks_t putacks; /* item number */
 struct dbr_sts_string sastrval; /* string field with status */
 dbr_string_t classname; /* string max size */
};
␌
/*----------------------------------------------------------------------------
* repository for some useful PV database constants and utilities
*
* item dimensions
* db_strval_dim dimension for string values
* db_units_dim dimension for record units text
* db_desc_dim dimension for record description text
* db_name_dim dimension for channel names (record.field\0)
* db_state_dim number of states possible in a state table
* db_state_text_dim dimension for a state text string
* usage: char state_table[db_state_dim][db_state_text_dim]
*
* type checking macros -- return non-zero if condition is true, zero otherwise
*
* int dbf_type_is_valid(type) type is a valid DBF_xxx
* int dbr_type_is_valid(type) type is a valid DBR_xxx
* int dbr_type_is_plain(type) type is a valid plain DBR_xxx
* int dbr_type_is_STS(type) type is a valid DBR_STS_xxx
* int dbr_type_is_TIME(type) type is a valid DBR_TIME_xxx
* int dbr_type_is_GR(type) type is a valid DBR_GR_xxx
* int dbr_type_is_CTRL(type) type is a valid DBR_CTRL_xxx
* int dbr_type_is_STRING(type) type is a valid DBR_STRING_xxx
* int dbr_type_is_SHORT(type) type is a valid DBR_SHORT_xxx
* int dbr_type_is_FLOAT(type) type is a valid DBR_FLOAT_xxx
* int dbr_type_is_ENUM(type) type is a valid DBR_ENUM_xxx
* int dbr_type_is_CHAR(type) type is a valid DBR_CHAR_xxx
* int dbr_type_is_LONG(type) type is a valid DBR_LONG_xxx
* int dbr_type_is_DOUBLE(type) type is a valid DBR_DOUBLE_xxx
*
* type conversion macros
*
* char *dbf_type_to_text(type) returns text matching DBF_xxx
* void dbf_text_to_type(text, type) finds DBF_xxx matching text
* int dbf_type_to_DBR(type) returns DBR_xxx matching DBF_xxx
* int dbf_type_to_DBR_TIME(type) returns DBR_TIME_xxx matching DBF_xxx
* int dbf_type_to_DBR_GR(type) returns DBR_GR_xxx matching DBF_xxx
* int dbf_type_to_DBR_CTRL(type) returns DBR_CTRL_xxx matching DBF_xxx
* char *dbr_type_to_text(type) returns text matching DBR_xxx
* void dbr_text_to_type(text, type) finds DBR_xxx matching text
*---------------------------------------------------------------------------*/
#define db_strval_dim MAX_STRING_SIZE
#define db_units_dim MAX_UNITS_SIZE
#define db_desc_dim 24
#define db_name_dim 36
#define db_state_dim MAX_ENUM_STATES
#define db_state_text_dim MAX_ENUM_STRING_SIZE
 
#define dbf_type_is_valid(type) ((type) >= 0 && (type) <= LAST_TYPE)
#define dbr_type_is_valid(type) ((type) >= 0 && (type) <= LAST_BUFFER_TYPE)
#define dbr_type_is_plain(type) \
 ((type) >= DBR_STRING && (type) <= DBR_DOUBLE)
#define dbr_type_is_STS(type) \
 ((type) >= DBR_STS_STRING && (type) <= DBR_STS_DOUBLE)
#define dbr_type_is_TIME(type) \
 ((type) >= DBR_TIME_STRING && (type) <= DBR_TIME_DOUBLE)
#define dbr_type_is_GR(type) \
 ((type) >= DBR_GR_STRING && (type) <= DBR_GR_DOUBLE)
#define dbr_type_is_CTRL(type) \
 ((type) >= DBR_CTRL_STRING && (type) <= DBR_CTRL_DOUBLE)
#define dbr_type_is_STRING(type) \
 ((type) >= 0 && (type) <= LAST_BUFFER_TYPE && \
 (type)%(LAST_TYPE+1) == DBR_STRING)
#define dbr_type_is_SHORT(type) \
 ((type) >= 0 && (type) <= LAST_BUFFER_TYPE && \
 (type)%(LAST_TYPE+1) == DBR_SHORT)
#define dbr_type_is_FLOAT(type) \
 ((type) >= 0 && (type) <= LAST_BUFFER_TYPE && \
 (type)%(LAST_TYPE+1) == DBR_FLOAT)
#define dbr_type_is_ENUM(type) \
 ((type) >= 0 && (type) <= LAST_BUFFER_TYPE && \
 (type)%(LAST_TYPE+1) == DBR_ENUM)
#define dbr_type_is_CHAR(type) \
 ((type) >= 0 && (type) <= LAST_BUFFER_TYPE && \
 (type)%(LAST_TYPE+1) == DBR_CHAR)
#define dbr_type_is_LONG(type) \
 ((type) >= 0 && (type) <= LAST_BUFFER_TYPE && \
 (type)%(LAST_TYPE+1) == DBR_LONG)
#define dbr_type_is_DOUBLE(type) \
 ((type) >= 0 && (type) <= LAST_BUFFER_TYPE && \
 (type)%(LAST_TYPE+1) == DBR_DOUBLE)
 
#define dbf_type_to_text(type) \
 ( ((type) >= -1 && (type) < dbf_text_dim-2) ? \
 dbf_text[type+1] : dbf_text_invalid )
 
#define dbf_text_to_type(text, type) \
 for (type=dbf_text_dim-3; type>=0; type--) { \
 if (strcmp(text, dbf_text[type+1]) == 0) \
 break; \
 }
 
#define dbr_type_to_text(type) \
 ( ((type) >= 0 && (type) < dbr_text_dim) ? \
 dbr_text[(type)] : dbr_text_invalid )
 
#define dbr_text_to_type(text, type) \
 for (type=dbr_text_dim-2; type>=0; type--) { \
 if (strcmp(text, dbr_text[type]) == 0) \
 break; \
 }
 
#define dbf_type_to_DBR(type) \
 (((type) >= 0 && (type) <= dbf_text_dim-3) ? \
 (type) : -1 )
 
#define dbf_type_to_DBR_STS(type) \
 (((type) >= 0 && (type) <= dbf_text_dim-3) ? \
 (type) + (dbf_text_dim-2) : -1 )
 
#define dbf_type_to_DBR_TIME(type) \
 (((type) >= 0 && (type) <= dbf_text_dim-3) ? \
 (type) + 2*(dbf_text_dim-2) : -1 )
 
#define dbf_type_to_DBR_GR(type) \
 (((type) >= 0 && (type) <= dbf_text_dim-3) ? \
 (type) + 3*(dbf_text_dim-2) : -1 )
 
#define dbf_type_to_DBR_CTRL(type) \
 (((type) >= 0 && (type) <= dbf_text_dim-3) ? \
 (type) + 4*(dbf_text_dim-2) : -1 )
 
 
LIBCA_API extern const char *dbf_text[LAST_TYPE+3];
LIBCA_API extern const short dbf_text_dim;
LIBCA_API extern const char *dbf_text_invalid;
 
LIBCA_API extern const char *dbr_text[LAST_BUFFER_TYPE+1];
LIBCA_API extern const short dbr_text_dim;
LIBCA_API extern const char *dbr_text_invalid;
#endif /*db_accessHFORdb_accessC*/
 
#ifdef __cplusplus
}
#endif
 
#endif /* ifndef INC_db_access_H */