// livecode.rl written by Monte Goulding. monte<att>goulding<dott>ws.
/************************* Required for every parser *************************/
#ifndef OHCOUNT_LIVECODE_PARSER_H
#define OHCOUNT_LIVECODE_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *LIVECODE_LANG = LANG_LIVECODE;
// the languages entities
const char *livecode_entities[] = {
"space", "comment", "string", "any",
};
// constants associated with the entities
enum {
LIVECODE_SPACE = 0, LIVECODE_COMMENT, LIVECODE_STRING, LIVECODE_ANY
};
/*****************************************************************************/
%%{
machine livecode;
write data;
include common "common.rl";
# Line counting machine
action livecode_ccallback {
switch(entity) {
case LIVECODE_SPACE:
ls
break;
case LIVECODE_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(LIVECODE_LANG)
break;
case NEWLINE:
std_newline(LIVECODE_LANG)
}
}
livecode_line_comment = ('--' | '#' | '//') @comment nonnewline*;
livecode_block_comment =
'/*' @comment (
newline %{ entity = INTERNAL_NL; } %livecode_ccallback
|
ws
|
(nonnewline - ws) @comment
)* :>> '*/';
livecode_comment = livecode_line_comment | livecode_block_comment;
livecode_string = '"' @code ([^\r\n\f"\\] | '\\' nonnewline)* '"';
livecode_line := |*
spaces ${ entity = LIVECODE_SPACE; } => livecode_ccallback;
livecode_comment;
livecode_string;
newline ${ entity = NEWLINE; } => livecode_ccallback;
^space ${ entity = LIVECODE_ANY; } => livecode_ccallback;
*|;
# Entity machine
action livecode_ecallback {
callback(LIVECODE_LANG, livecode_entities[entity], cint(ts), cint(te), userdata);
}
livecode_line_comment_entity = ('--' | '#' | '//') nonnewline*;
livecode_block_comment_entity = '/*' any* :>> '*/';
livecode_comment_entity = livecode_line_comment_entity | livecode_block_comment_entity;
livecode_entity := |*
space+ ${ entity = LIVECODE_SPACE; } => livecode_ecallback;
livecode_comment_entity ${ entity = LIVECODE_COMMENT; } => livecode_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with LiveCode 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_livecode(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) ? livecode_en_livecode_line : livecode_en_livecode_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(LIVECODE_LANG) }
}
#endif
/*****************************************************************************/