// css.rl written by Mitchell Foral. mitchell<att>caladbolg<dott>net.
/************************* Required for every parser *************************/
#ifndef OHCOUNT_CSS_PARSER_H
#define OHCOUNT_CSS_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *CSS_LANG = LANG_CSS;
// the languages entities
const char *css_entities[] = {
"space", "comment", "string", "at_rule", "selector",
"value", "unit", "color", "url", "any"
};
// constants associated with the entities
enum {
CSS_SPACE = 0, CSS_COMMENT, CSS_STRING, CSS_AT_RULE, CSS_SELECTOR,
CSS_VALUE, CSS_UNIT, CSS_COLOR, CSS_URL, CSS_ANY
};
/*****************************************************************************/
%%{
machine css;
write data;
include common "common.rl";
# Line counting machine
action css_ccallback {
switch(entity) {
case CSS_SPACE:
ls
break;
case CSS_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(CSS_LANG)
break;
case NEWLINE:
std_newline(CSS_LANG)
}
}
css_comment =
'/*' @comment (
newline %{ entity = INTERNAL_NL; } %css_ccallback
|
ws
|
(nonnewline - ws) @comment
)* :>> '*/';
css_sq_str =
'\'' @code (
newline %{ entity = INTERNAL_NL; } %css_ccallback
|
ws
|
[^\r\n\f\t '\\] @code
|
'\\' nonnewline @code
)* '\'';
css_dq_str =
'"' @code (
newline %{ entity = INTERNAL_NL; } %css_ccallback
|
ws
|
[^\r\n\f\t "\\] @code
|
'\\' nonnewline @code
)* '"';
css_string = css_sq_str | css_dq_str;
css_line := |*
spaces ${ entity = CSS_SPACE; } => css_ccallback;
css_comment;
css_string;
newline ${ entity = NEWLINE; } => css_ccallback;
^space ${ entity = CSS_ANY; } => css_ccallback;
*|;
# Entity machine
action css_ecallback {
callback(CSS_LANG, css_entities[entity], cint(ts), cint(te), userdata);
}
css_comment_entity = '/*' any* :>> '*/';
css_entity := |*
space+ ${ entity = CSS_SPACE; } => css_ecallback;
css_comment_entity ${ entity = CSS_COMMENT; } => css_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with CSS code.
*
* @param *buffer The string to parse.
* @param length The length of the string to parse.
* @param count Integer flag specifying whether or not to count lines. If yes,
* uses the Ragel machine optimized for counting. Otherwise uses the Ragel
* machine optimized for returning entity positions.
* @param *callback Callback function. If count is set, callback is called for
* every line of code, comment, or blank with 'lcode', 'lcomment', and
* 'lblank' respectively. Otherwise callback is called for each entity found.
*/
void parse_css(char *buffer, int length, int count,
void (*callback) (const char *lang, const char *entity, int s,
int e, void *udata),
void *userdata
) {
init
%% write init;
cs = (count) ? css_en_css_line : css_en_css_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(CSS_LANG) }
}
#endif
/*****************************************************************************/