Experimental Physics and
Industrial Control System

"Jeff Hill" <[email protected]> · Wed, 20 Mar 2002 12:26:14 -0700

Geoff,

I agree that at first look the dbf_text array appears to be misaligned.
When Roger Cole created this array for the original EPICS archiver, I
think that he intended for this array to be used only with the following
macros, but unfortunately he did not make the array private as would be
preferred when employing modern interface design methods. At this stage
we are making only small changes in the original CA client interfaces so
that old programs continue to run. Therefore, it is unlikely that this
situation will be addressed except by a new C++ based CA client API.

#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; \
    }

Jeff

> -----Original Message-----
> From: Geoff Savage [mailto:[email protected]]
> Sent: Wednesday, March 20, 2002 11:02 AM
> To: [email protected]
> Subject: dbf_text vs. dbr_text
> 
> We are using epics v3.13.4.  In db_access.h there are arrays
containing
> the string representation of the dbr and dbf types.  To me they appear
> inconsistent.  Based on these definitions the dbf_text entries are
> incremented by one as compared to the dbr_text entries.  What am I
> missing?
> 
> Geoff
> 
> /* 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
> 
> epicsShareDef READONLY char *dbf_text[] = {
>         "TYPENOTCONN",
>         "DBF_STRING",
>         "DBF_SHORT",
>         "DBF_FLOAT",
>         "DBF_ENUM",
>         "DBF_CHAR",
>         "DBF_LONG",
>         "DBF_DOUBLE",
>         "DBF_NO_ACCESS"
>     };
> 
> epicsShareDef READONLY char *dbr_text[LAST_BUFFER_TYPE+1] = {
>         "DBR_STRING",
>         "DBR_SHORT",
>         "DBR_FLOAT",
>         "DBR_ENUM",
>         "DBR_CHAR",
>         "DBR_LONG",
>         "DBR_DOUBLE",
>         "DBR_STS_STRING",
>         "DBR_STS_SHORT",
>         "DBR_STS_FLOAT",
>         "DBR_STS_ENUM",
>         "DBR_STS_CHAR",
>         "DBR_STS_LONG",
>         "DBR_STS_DOUBLE",
>         "DBR_TIME_STRING",
>         "DBR_TIME_SHORT",
>         "DBR_TIME_FLOAT",
>         "DBR_TIME_ENUM",
>         "DBR_TIME_CHAR",
>         "DBR_TIME_LONG",
>         "DBR_TIME_DOUBLE",
>         "DBR_GR_STRING",
>         "DBR_GR_SHORT",
>         "DBR_GR_FLOAT",
>         "DBR_GR_ENUM",
>         "DBR_GR_CHAR",
>         "DBR_GR_LONG",
>         "DBR_GR_DOUBLE",
>         "DBR_CTRL_STRING",
>         "DBR_CTRL_SHORT",
>         "DBR_CTRL_FLOAT",
>         "DBR_CTRL_ENUM",
>         "DBR_CTRL_CHAR",
>         "DBR_CTRL_LONG",
>         "DBR_CTRL_DOUBLE",
>         "DBR_PUT_ACKT",
>         "DBR_PUT_ACKS",
>         "DBR_STSACK_STRING",
>         "DBR_CLASS_NAME",
>     };

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System