// logtalk.rl written by Paulo Moura. pmoura<att>logtalk<dott>org.
/************************* Required for every parser *************************/
#ifndef OHCOUNT_LOGTALK_PARSER_H
#define OHCOUNT_LOGTALK_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *LOGTALK_LANG = LANG_LOGTALK;
// the languages entities
const char *logtalk_entities[] = {
"space", "comment", "string", "any"
};
// constants associated with the entities
enum {
LOGTALK_SPACE = 0, LOGTALK_COMMENT, LOGTALK_STRING, LOGTALK_ANY
};
/*****************************************************************************/
%%{
machine logtalk;
write data;
include common "common.rl";
# Line counting machine
action logtalk_ccallback {
switch(entity) {
case LOGTALK_SPACE:
ls
break;
case LOGTALK_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(LOGTALK_LANG)
break;
case NEWLINE:
std_newline(LOGTALK_LANG)
}
}
logtalk_line_comment = '%' @comment nonnewline*;
logtalk_block_comment =
'/*' @comment (
newline %{ entity = INTERNAL_NL; } %logtalk_ccallback
|
ws
|
(nonnewline - ws) @comment
)* :>> '*/';
logtalk_comment = logtalk_line_comment | logtalk_block_comment;
logtalk_sq_str = '\'' @code ([^\r\n\f'\\] | '\\' nonnewline)* '\'';
logtalk_dq_str = '"' @code ([^\r\n\f"\\] | '\\' nonnewline)* '"';
logtalk_string = logtalk_sq_str | logtalk_dq_str;
logtalk_line := |*
spaces ${ entity = LOGTALK_SPACE; } => logtalk_ccallback;
logtalk_comment;
logtalk_string;
newline ${ entity = NEWLINE; } => logtalk_ccallback;
^space ${ entity = LOGTALK_ANY; } => logtalk_ccallback;
*|;
# Entity machine
action logtalk_ecallback {
callback(LOGTALK_LANG, logtalk_entities[entity], cint(ts), cint(te),
userdata);
}
logtalk_line_comment_entity = '%' nonnewline*;
logtalk_block_comment_entity = '/*' any* :>> '*/';
logtalk_comment_entity = logtalk_line_comment_entity | logtalk_block_comment_entity;
logtalk_entity := |*
space+ ${ entity = LOGTALK_SPACE; } => logtalk_ecallback;
logtalk_comment_entity ${ entity = LOGTALK_COMMENT; } => logtalk_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with Logtalk 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_logtalk(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) ? logtalk_en_logtalk_line : logtalk_en_logtalk_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(LOGTALK_LANG) }
}
#endif
/*****************************************************************************/