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INFOR$–Internal Format Table Interface Routines
The element E3 is assumed to be in the same file as element E2. If the SELT$ routine is
called to transfer the third field into the ELT$ table, then CFN is set to 2. Because there
is no file name and no leading period in the second field, it is assumed that E2 is in file
TPF$. Since TPF$ is an assumed file and not explicitly included on the processor call
line, the field FNL is set to zero. In the following example:
@PROCESSOR F.E1,.E2,.E3
field two contains a leading period. The element E3 is still assumed to be in the same
file as E2. By the same convention, element E2 is assumed to be in the same file as
element E1. In this case, when SELT$ is called to transfer the third field of the
processor call line, CFN is set to 1, FNL is set to 1, and the field FNAME in ELT$ is set to
the Fieldata character string F.
A leading asterisk sets the implied qualifier flag (IQF) to nonzero and the file qualifier
length (FQL) to zero.
SELT$ handles element cycles from the processor call line as follows:
• If the element cycle field is not specified, the element cycle signal character (ECC)
equals a Fieldata minus sign (-), and the Binary Element Cycle (BEC) equals zero.
• When the element cycle field is specified, the numeric portion of the cycle is
converted to binary and the result is placed in BEC.
• If the cycle is neither numeric nor signed numeric or is greater than 63, the field ECC
contains the Fieldata image E, which indicates an error. Normally, ECC contains 0,
Fieldata +, or Fieldata - when the first character of the cycle is numeric, +, or -,
respectively.
No-find Return
When a no-find return occurs, register A0 contains the address of the control word in the
INFOR table that stopped the search. If this word is zero, the rest of the INFOR table is
empty.
12.3.4. DUSE$–Assign a USE Name to the File in ELT$
The DUSE$ routine dynamically attaches an internal name to the file currently in the
ELT$ table.
The DUSE$ routine is called by the MASM procedure I$NFOR. This procedure can be
used to generate the calling sequence for the relocatable version of the DUSE$ routine,
the common bank version of the routine, or the common bank version of the routine
using the Auto Switch calling sequence. Section 3 describes the advantages and
disadvantages of using the different types of calls.
Calling Format
I$NFOR[,t] ‘DUSE$’[,use-name] [packet]
return
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