Reading a stream from a C string

[Jeroen Demeyer <jdemeyer@cage.ugent.be>]

Dear pari-dev,

the functions gp_read_str() on the one hand and 
gp_read_stream()/gp_read_file() on the other hand are not functionally 
identical: essentially, gp_read_str() reads the input as one line while 
the other allow multi-line input.

Now, I would also like a function which reads from a C string but which 
does treat newlines like gp_read_stream(). This function could be called 
gp_read_stream_from_str() or something. It would be not hard to 
implement, analogous to gp_read_stream().

What do you think?

Cheers,
Jeroen.