using lex with strings, not files

[shap]

In article <5384 at lectroid.sw.stratus.com> leavitt at mordor.hw.stratus.com (Will Leavitt) writes:
>
>   I'd like to use lex & yacc to parse strings within an application, but they
>seem to be hardwired to take their input from stdin.  What is the cannonical 
>way to get them to work on a string?  Thanks!

Yacc doesn't read the input directly, so there's no work there.  My
recollection is that lex uses two macros: GET() and UNGET() to
obtain/pushback characters.  If you take a look at the lex-generated C
code you will spot them. 

What you need to do is supply your own version of these macros at teh
top of your file.

Jonathan