Very Computer

1. Blobs: How to tell when I retrieved a null blob

Hi there,

To pass a blob by reference from 4gl to C functions, call your C function using
blob variable:

4gl code snippet:
-----------------
    define MyBlobVar    byte

    --- some more stuff...

    call MyCFunction( MyBlobVar )

In the C function, you get the blob using the function "poplocator":

C code snippet:
---------------

int MyCFunction( x )
int    x;
{

    loc_t     *MyBlobVar; /* Blob structure */

    /* Test parameter stack, etc */

    poplocator( &MyBlobVar );    /* Gets address of blob */

    /* even more stuff */

______________________________ Reply Separator _________________________________
Subject: Re: Blobs: How to tell when I retrieved a null blob

Date:    17/2/97 9:38 AM

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