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%top{
/* Include <config.h> before anything else because Gnulib headers such
as <stdio.h> rely on it.
However, when cross-compiling, don't include <config.h> because it
contains information about the host, not about the build. */
#ifndef CROSS_COMPILING
# include <config.h>
#endif
}
%option noyywrap
%option nounput
%pointer
EOL \n
SPACE [ \t\v\f]
WS [ \t\v\n\f]
DIGIT [0-9]
LETTER [a-zA-Z_]
OCTDIGIT [0-7]
HEXDIGIT [a-fA-F0-9]
EXPONENT [Ee][+-]?{DIGIT}+
FLOQUAL (f|F|l|L)
INTQUAL (l|L|ll|LL|lL|Ll|u|U)
%{
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* Prevent compilation of static input() function in generated scanner
code. This function is never actually used, and GCC 4.3 will emit
an error for that. */
#define YY_NO_INPUT
int filter_snarfage = 0;
int print = 1;
enum t_state {
SKIP,
MULTILINE,
MULTILINE_COOKIE,
COOKIE
};
enum t_state state = SKIP;
int cookie_was_last = 0;
#define OUT_RAW(type,text) if (print) printf ("(%s . \"%s\")\n", #type, text)
#define OUT_T(type) OUT_RAW (type, yytext)
#define OUT_S if (print) printf ("%s\n", yytext)
#define OUT(type) if (print) printf ("%s\n", #type)
#define IS_COOKIE cookie_was_last = 1
#define IS_NOT_COOKIE cookie_was_last = 0
%}
%%
\/\*(\n|[^*]|\*[^/])*\*\/ { OUT_T (comment); }
({SPACE}*(\\\n)*{SPACE}*)+ ;
({SPACE}*\n*{SPACE}*)+ { OUT(eol); }
#.*\n { OUT(hash); IS_NOT_COOKIE; }
{LETTER}({LETTER}|{DIGIT})* { OUT_T (id); IS_NOT_COOKIE; }
0[xX]{HEXDIGIT}+{INTQUAL}? { OUT_RAW (int_hex, yytext + 2); IS_NOT_COOKIE; }
0{OCTDIGIT}+{INTQUAL}? { OUT_RAW (int_oct, yytext + 1); IS_NOT_COOKIE; }
{DIGIT}+{INTQUAL}? { OUT_T (int_dec); IS_NOT_COOKIE; }
L?\'(\\.|[^\\\'])+\' { OUT_T (char); IS_NOT_COOKIE; }
{DIGIT}+{EXPONENT}{FLOQUAL}? { OUT_T (flo_dec); IS_NOT_COOKIE; }
{DIGIT}*"."{DIGIT}+({EXPONENT})?{FLOQUAL}? { OUT_T (flo_dec); IS_NOT_COOKIE; }
{DIGIT}+"."{DIGIT}*({EXPONENT})?{FLOQUAL}? { OUT_T (flo_dec); IS_NOT_COOKIE; }
L?\"(\\.|[^\\\"])*\" { OUT_S; IS_NOT_COOKIE; }
"..." { OUT (ellipsis); IS_NOT_COOKIE; }
">>=" { OUT (shift_right_assign); IS_NOT_COOKIE; }
"<<=" { OUT (shift_left_assign); IS_NOT_COOKIE; }
"+=" { OUT (add_assign); IS_NOT_COOKIE; }
"-=" { OUT (sub_assign); IS_NOT_COOKIE; }
"*=" { OUT (mul-assign); IS_NOT_COOKIE; }
"/=" { OUT (div_assign); IS_NOT_COOKIE; }
"%=" { OUT (mod_assign); IS_NOT_COOKIE; }
"&=" { OUT (logand_assign); IS_NOT_COOKIE; }
"^=" { OUT (logxor_assign); IS_NOT_COOKIE; }
"|=" { OUT (logior_assign); IS_NOT_COOKIE; }
">>" { OUT (right_shift); IS_NOT_COOKIE; }
"<<" { OUT (left_shift); IS_NOT_COOKIE; }
"++" { OUT (inc); IS_NOT_COOKIE; }
"--" { OUT (dec); IS_NOT_COOKIE; }
"->" { OUT (ptr); IS_NOT_COOKIE; }
"&&" { OUT (and); IS_NOT_COOKIE; }
"||" { OUT (or); IS_NOT_COOKIE; }
"<=" { OUT (le); IS_NOT_COOKIE; }
">=" { OUT (ge); IS_NOT_COOKIE; }
"==" { OUT (eq); IS_NOT_COOKIE; }
"!=" { OUT (ne); IS_NOT_COOKIE; }
";" { OUT (semicolon); IS_NOT_COOKIE; }
("{"|"<%") {
OUT (brace_open);
if (filter_snarfage && cookie_was_last && state == COOKIE)
state = MULTILINE;
IS_NOT_COOKIE; }
("}"|"%>") {
OUT (brace_close);
if (filter_snarfage && cookie_was_last && state == MULTILINE_COOKIE) {
state = SKIP;
print = 0;
}
IS_NOT_COOKIE; }
"," { OUT (comma); IS_NOT_COOKIE; }
":" { OUT (colon); IS_NOT_COOKIE; }
"=" { OUT (assign); IS_NOT_COOKIE; }
"(" { OUT (paren_open); IS_NOT_COOKIE; }
")" { OUT (paren_close); IS_NOT_COOKIE; }
("["|"<:") { OUT (bracket_open); IS_NOT_COOKIE; }
("]"|":>") { OUT (bracket_close); IS_NOT_COOKIE; }
"." { OUT (dot); IS_NOT_COOKIE; }
"&" { OUT (amp); IS_NOT_COOKIE; }
"!" { OUT (bang); IS_NOT_COOKIE; }
"~" { OUT (tilde); IS_NOT_COOKIE; }
"-" { OUT (minus); IS_NOT_COOKIE; }
"+" { OUT (plus); IS_NOT_COOKIE; }
"*" { OUT (star); IS_NOT_COOKIE; }
"/" { OUT (slash); IS_NOT_COOKIE; }
"%" { OUT (percent); IS_NOT_COOKIE; }
"<" { OUT (lt); IS_NOT_COOKIE; }
">" { OUT (gt); IS_NOT_COOKIE; }
\^{WS}*\^ {
if (filter_snarfage)
switch (state) {
case SKIP:
state = COOKIE;
print = 1;
OUT (snarf_cookie);
break;
case MULTILINE:
case MULTILINE_COOKIE:
state = MULTILINE_COOKIE;
OUT (snarf_cookie);
break;
case COOKIE:
state = SKIP;
OUT (snarf_cookie);
print = 0;
break;
default:
/* whoops */
abort ();
break;
}
else
OUT (snarf_cookie);
IS_COOKIE; }
"^" { OUT (caret); IS_NOT_COOKIE; }
"|" { OUT (pipe); IS_NOT_COOKIE; }
"?" { OUT (question); IS_NOT_COOKIE; }
. { fprintf (stderr, "*%s", yytext); fflush (stderr); IS_NOT_COOKIE; }
%%
int
main (int argc, char *argv[])
{
if (argc > 1 && !strcmp (argv[1], "--filter-snarfage")) {
filter_snarfage = 1;
print = 0;
}
yylex ();
return EXIT_SUCCESS;
}
/*
Local Variables:
c-file-style: "gnu"
End:
*/
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