Using Lex (and Yacc) on a string.

[George Bogatko]

In article <1990Aug10.012927.5558 at basho.uucp>, john at basho.uucp (John Lacey) writes:
> Has anyone done this, or see a way to do it, or know a way to do it, or ....

Put these lines in your lex file after the #include lines

%{
#include <stdio.h>
#include <y.tab.h>

extern char *mis_ptr;

#undef input
#undef unput
# define input() (*mis_ptr=='\n'?0:*mis_ptr++)
# define unput(c) (*--mis_ptr=(c) )
%}


Now have a char buff called myinputstring

char myinputstring[100];

do the following in main:

char *mis_ptr;
main()
{
	for(;;)
	{
		gets(buf);
		mis_ptr = buf;
		yylex();
	}
}

I think you get the picture now?


GB