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/*****************************************************************************
* CSSLexer.l : lexer for simplified CSS, based on W3C spec
*****************************************************************************
* Copyright (C) 2017 VideoLabs, VLC authors and VideoLAN
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
%option case-insensitive
%option reentrant
%option bison-bridge
%option noyywrap
%option nounput
%option noinput
%option never-interactive
%option nostdinit
%{
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include "css_parser.h"
#include "CSSGrammar.h"
#define VAL(a, b) { yylval->term.val = (a); yylval->term.type = TYPE_ ## b; }
#define us_strtof strtof
char *d;
%}
h [0-9a-f]
nonascii [\200-\377]
unicode \\{h}{1,6}[ \t\r\n\f]?
escape {unicode}|\\[ -~\200-\377]
nmstart [a-z]|{nonascii}|{escape}
nmchar [a-z0-9-]|{nonascii}|{escape}
string1 \"([\t !#$%&(-~]|\\{nl}|\'|{nonascii}|{escape})*\"
string2 \'([\t !#$%&(-~]|\\{nl}|\"|{nonascii}|{escape})*\'
ident [-]?{nmstart}{nmchar}*
name {nmchar}+
num [0-9]+|[0-9]*"."[0-9]+
string {string1}|{string2}
url ([!#$%&*-~]|{nonascii}|{escape})*
w [ \t\r\n\f]*
nl \n|\r\n|\r|\f
range \?{1,6}|{h}(\?{0,5}|{h}(\?{0,4}|{h}(\?{0,3}|{h}(\?{0,2}|{h}(\??|{h})))))
%%
[ \t\r\n\f]+ {return WHITESPACE;}
\/\*[^*]*\*+([^/][^*]*\*+)*\/ /* ignore comments */
"<!--" {return CDO;}
"-->" {return CDC;}
"~=" {return INCLUDES;}
"|=" {return DASHMATCH;}
{string} { yylval->string = vlc_css_unquotedunescaped(yytext); return STRING;}
{ident} { yylval->string = vlc_css_unescaped(yytext); return IDENT;}
"@font-face" {return FONT_FACE_SYM;}
"!{w}important" {return IMPORTANT_SYM;}
{num}em { VAL( us_strtof(yytext, &d), EMS ); return LENGTH;}
{num}ex { VAL( atoi(yytext), EXS ); return LENGTH;}
{num}px { VAL( atoi(yytext), PIXELS ); return LENGTH;}
{num}cm { VAL( us_strtof(yytext, &d) * 10, MILLIMETERS ); return LENGTH;}
{num}mm { VAL( atoi(yytext), MILLIMETERS ); return LENGTH;}
{num}in { VAL( us_strtof(yytext, &d) * 25.4, MILLIMETERS ); return LENGTH;}
{num}pt { VAL( us_strtof(yytext, &d), POINTS ); return LENGTH;}
{num}pc { VAL( us_strtof(yytext, &d), POINTS ); return LENGTH;}
{num}deg { VAL( us_strtof(yytext, &d), DEGREES ); return ANGLE;}
{num}rad { VAL( us_strtof(yytext, &d) * 0.0174533, DEGREES ); return ANGLE;}
{num}grad { VAL( us_strtof(yytext, &d) * 1.1111111, DEGREES ); return ANGLE;}
{num}ms { VAL( atoi(yytext), MILLISECONDS ); return TIME;}
{num}s { VAL( atoi(yytext) * 1000, MILLISECONDS ); return TIME;}
{num}Hz { VAL( atoi(yytext), HERTZ ); return FREQ;}
{num}kHz { VAL( atoi(yytext) * 1000, HERTZ ); return FREQ;}
{num}{ident} { VAL( 0, DIMENSION ); return DIMEN;}
{num}% { VAL( atoi(yytext), PERCENT ); return PERCENTAGE;}
{num} { VAL( us_strtof(yytext, &d), NONE ); return NUMBER;}
"url("{w}{string}{w}")" { yylval->string = vlc_css_unquotedunescaped(yytext); return URI;}
"url("{w}{url}{w}")" { yylval->string = vlc_css_unquotedunescaped(yytext); return URI;}
{ident}"(" { yylval->string = vlc_css_unescaped(yytext); return FUNCTION;}
"#"{ident} {yylval->string = vlc_css_unescaped(yytext); return IDSEL;}
"#"{name} {yylval->string = vlc_css_unescaped(yytext); return HASH;}
U\+{range} { yylval->string = strdup(yytext); return UNICODERANGE;}
U\+{h}{1,6}-{h}{1,6} { yylval->string = strdup(yytext); return UNICODERANGE;}
. {return *yytext;}
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