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// re2c $INPUT -o $OUTPUT --input custom
#include <stdio.h>
char peek (FILE * f)
{
char c = fgetc (f);
ungetc (c, f);
return c;
}
bool lex (FILE * f, const long limit)
{
long marker;
long ctxmarker;
# define YYCTYPE char
# define YYPEEK() peek (f)
# define YYSKIP() fgetc (f)
# define YYBACKUP() marker = ftell (f)
# define YYBACKUPCTX() ctxmarker = ftell (f)
# define YYRESTORE() fseek (f, marker, SEEK_SET)
# define YYRESTORECTX() fseek (f, ctxmarker, SEEK_SET)
# define YYLESSTHAN(n) limit - ftell (f) < n
# define YYFILL(n) {}
/*!re2c
"int buffer " / "[" [0-9]+ "]" { return true; }
* { return false; }
*/
}
int main ()
{
const char buffer [] = "int buffer [1024]";
const char fn [] = "input.txt";
FILE * f = fopen (fn, "w");
fwrite (buffer, 1, sizeof (buffer), f);
fclose (f);
f = fopen (fn, "rb");
int result = !lex (f, sizeof (buffer));
fclose (f);
return result;
}
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