Thanks, one last question in this context.
On 29.01.2019 21:07, Rick McGuire wrote:
> On Tue, Jan 29, 2019 at 1:18 PM Rony G Flatscher <rony.flatsc...@wu.ac.at
> <mailto:rony.flatsc...@wu.ac.at>> wrote:
>
> Looked thru the code, a few quick questions:
>
> If a command handler that has no redirection, would the last argument
> ioctl be NULL?
>
> No, if the command handler is registered as a redirecting handler, then it
> will always be passed
> an IOContext. You can then query the context to see if there has been any
> redirection requested
> and what types.
There is a new IsRedirectionRequested() function listed and documented as:
8.17.100. *NEW* IsRedirectionRequested
This API is available in context I/O Redirector since ooRexx 5.0.
logical_t flag;
// Method Syntax Form(s)
flag = context->IsRedirectionRequested();
Tests whether for the current command any redirection was requested using
the WITH subkeyword of
an ADDRESS instruction.
Arguments: None.
Returns: 1 if any redirection was requested, 0 otherwise.
See also methods *NEW* AreOutputAndErrorSameTarget, *NEW*
IsErrorRedirected, *NEW*
IsInputRedirected, *NEW* IsOutputRedirected, *NEW* ReadInput, *NEW*
ReadInputBuffer, *NEW*
WriteError, *NEW* WriteErrorBuffer, *NEW* WriteOutput, and *NEW*
WriteOutputBuffer.
The function "AddCommandEnvironment(name,handler,type)" has a "type" argument
that may be one of
two: DIRECT_COMMAND_ENVIRONMENT and REDIRECTING_COMMAND_ENVIRONMENT.
Question:
What is exactly the difference between the two?
E.g. the REDIRECTING_COMMAND_ENVIRONMENT must use the "ReadInput[Buffer]()"
and the
"Write{Error|Output}[Buffer]()" functions, whereas the
"DIRECT_COMMAND_ENVIRONMENT" must use
.input for reading, .output and .error for writing instead?
Question:
Can "IsRedirectionRequested()" be issued for both handler types?
And if so, in the case of a DIRECT_COMMAND_ENVIRONMENT would then the
functions
"AreOutputAndErrorSameTarget()", "IsErrorRedirected()",
"IsInputRedirected()",
"IsOutputRedirected()" be available as well? If so, how about the
"Write[*]()" functions?
---rony
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