Re: Lex Help

[John W. Millaway]

> The problem itself is that I send data to a remote host in the form of
> tokens. At the other end of the socket the fd is redirected to yyin and
> the lex builds a string out of the token until a } is received. The string
> can get as long as 1938 bytes. The string is then parsed using Yacc.
> 
> If, however the string length goes beyond this length (1939 byte), the lex
> engine goes into a weird state and is not able to analyse any more.

It sounds all ass-backwards to me. lex should be taking a string a spitting out
tokens, not the other way around. In any case, here are some speculations:

You have a buffer overflow. It may be due to a misunderstanding over yytext.
You can't modifiy yytext, you must copy it to preserve data between calls to
yylex(). Are you using lex or flex? Did you run it through a debugger? Post the
source code, otherwise we can't be of much help.


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