Read Environment Variable

Reads the first occurrence of a single variable. With W3READ-ENVIRONMENT-ARRAY, a variable can be read beginning with an offset. This can be used to read multiple occurrences of the same variable.

1. W3READ-ENVIRONMENT-ARRAY

   1 W3START         (I4)        /* io/m : Offset to be started at
   *                             /*        out: 0 no occurrences
   *                             /*        out: >0 more occurrences
   1 W3NAME          (A072)      /* i /m : Name of the variable to
   *                             /*        be searched for
   1 W3VALUESERVER   (A1)        /* i /m : Search for variables from
   *                             /*        'S' server
   *                             /*        'P' page or URL
   *                             /*        ' ' both
   1 W3ARRAYCOUNTER  (I4)        /* io/m : Size of array,
                                 /*        characters read
   1 W3VALUEARRAY    (A001/1:V)  /*  o/m : Array with the returned value 
   1 W3VALUELENGTH   (I4)        /*  o/m : length of the value
   

2. W3READ-ENVIRONMENT

   1 W3NAME        (A072)  /* i /m : Name of the variable
                           /*        searched for
   1 W3VALUESERVER (A1)    /* i /m : Search for variables in
   *                       /*        'S' server
   *                       /*        'P' page or URL
   *                       /*        ' ' both
   1 W3VALUE       (A250)  /*  o/m : Returned value
   1 W3VALUELENGTH (I4)    /*  o/m : Length of the value
   

3. W3READ-ENVIRONMENT-TO-DYNAMIC

   1 W3NAME          (A072)      /* i /m : Name of the variable
                                 /*        searched for
   1 W3VALUESERVER   (A1)        /* i /m : Search for variables in
   *                             /*        'S' server
   *                             /*        'P' page or URL
   *                             /*        ' ' both
   1 W3VALUEDYNAMIC  (A) DYNAMIC /*  o/m : Returned value
   

PERFORM W3READ-ENVIRONMENT-ARRAY W3START W3NAME W3VALUESERVER
       W3ARRAYCOUNTER W3VALUEARRAY(*) W3VALUELENGTH

PERFORM W3READ-ENVIRONMENT W3NAME W3VALUESERVER W3VALUE
       W3VALUELENGTH

PERFORM W3READ-ENVIRONMENT-TO-DYNAMIC W3NAME W3VALUESERVER
       W3VALUEDYNAMIC