102 lines
2.6 KiB
Plaintext
102 lines
2.6 KiB
Plaintext
/*
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* This file is part of NetSurf, http://netsurf.sourceforge.net/
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* Licensed under the GNU General Public License,
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* http://www.opensource.org/licenses/gpl-license
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* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
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*/
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/** \file
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* CSS tokeniser using re2c.
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*
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* see CSS2 Specification, chapter 4
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* http://www.w3.org/TR/REC-CSS2/syndata.html,
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* and errata
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* http://www.w3.org/Style/css2-updates/REC-CSS2-19980512-errata
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*/
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#include <stdbool.h>
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#define CSS_INTERNALS
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#include "netsurf/css/css.h"
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#include "netsurf/css/parser.h"
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#define YYCTYPE unsigned char
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#define YYCURSOR (*buffer)
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#define YYLIMIT end
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#define YYMARKER marker
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#define YYFILL(n) { return 0; }
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/**
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* Identify a CSS source token.
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*
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* \param buffer source to tokenise, updated to new position
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* \param end end of source
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* \param token_text updated to start of recognized token
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* \return token number
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*/
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int css_tokenise(unsigned char **buffer, unsigned char *end,
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unsigned char **token_text)
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{
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unsigned char *marker;
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start:
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*token_text = YYCURSOR;
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/*!re2c
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nonascii = [\200-\377];
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unicode = "\\" [0-9a-f]+ [ \n\r\t\f]?;
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escape = unicode | "\\" [ -~\200-\377];
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nmchar = [-a-zA-Z0-9_] | nonascii | escape;
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nmstart = [a-zA-Z_] | nonascii | escape;
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ident = nmstart nmchar*;
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name = nmchar+;
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num = [+-]? [0-9]+ | [0-9]* "." [0-9]+;
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nl = "\n" | "\r\n" | "\r" | "\f";
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string1 = "\"" ([\t !#$%&(-~] | "\\" nl | "'" | nonascii | escape)* "\"";
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string2 = "'" ([\t !#$%&(-~] | "\\" nl | "\""| nonascii | escape)* "'";
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string = string1 | string2;
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w = [ \t\r\n\f]*;
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any = [\000-\377];
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ident { return IDENT; }
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"@" ident { return ATKEYWORD; }
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string { return STRING; }
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"#" name { return HASH; }
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num { return NUMBER; }
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num "%" { return PERCENTAGE; }
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num ident { return DIMENSION; }
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"url(" w string w ")" | "url(" w ([!#$%&*-~]|nonascii|escape)* w ")"
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{ return URI; }
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"U+" [0-9A-F?]+ ("-" [0-9A-F]+ )?
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{ return UNICODE_RANGE; }
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"<!--" { goto start; /* ignore CDO */ }
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"-->" { goto start; /* ignore CDC */ }
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";" { return SEMI; }
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"{" { return LBRACE; }
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"}" { return RBRACE; }
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"(" { return LPAREN; }
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")" { return RPAREN; }
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"[" { return LBRAC; }
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"]" { return RBRAC; }
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[ \t\r\n\f]+ { goto start; /* ignore whitespace */ }
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"/*" (any\[*])* "*"+ ((any\[/]) (any\[*])* "*"+)* "/"
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{ goto start; /* ignore comments */ }
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ident "(" { return FUNCTION; }
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"=" { return EQUALS; }
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"~=" { return INCLUDES; }
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"|=" { return DASHMATCH; }
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"^=" { return PREFIX; }
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"$=" { return SUFFIX; }
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"*=" { return SUBSTR; }
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":" { return COLON; }
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"," { return COMMA; }
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"+" { return PLUS; }
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">" { return GT; }
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"." { return DOT; }
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"*" { return ASTERISK; }
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any { return DELIM; }
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*/
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}
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