// erlang.rl written by Mitchell Foral. mitchell<att>caladbolg<dott>net.
/************************* Required for every parser *************************/
#ifndef OHCOUNT_ERLANG_PARSER_H
#define OHCOUNT_ERLANG_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *ERLANG_LANG = LANG_ERLANG;
// the languages entities
const char *erlang_entities[] = {
"space", "comment", "string", "any"
};
// constants associated with the entities
enum {
ERLANG_SPACE = 0, ERLANG_COMMENT, ERLANG_STRING, ERLANG_ANY
};
/*****************************************************************************/
%%{
machine erlang;
write data;
include common "common.rl";
# Line counting machine
action erlang_ccallback {
switch(entity) {
case ERLANG_SPACE:
ls
break;
case ERLANG_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(ERLANG_LANG)
break;
case NEWLINE:
std_newline(ERLANG_LANG)
}
}
erlang_comment = '%%' @comment nonnewline*;
erlang_sq_str = '\'' @code ([^\r\n\f'\\] | '\\' nonnewline)* '\'';
erlang_dq_str = '"' @code ([^\r\n\f"\\] | '\\' nonnewline)* '"';
erlang_string = erlang_sq_str | erlang_dq_str;
erlang_line := |*
spaces ${ entity = ERLANG_SPACE; } => erlang_ccallback;
erlang_comment;
erlang_string;
newline ${ entity = NEWLINE; } => erlang_ccallback;
^space ${ entity = ERLANG_ANY; } => erlang_ccallback;
*|;
# Entity machine
action erlang_ecallback {
callback(ERLANG_LANG, erlang_entities[entity], cint(ts), cint(te),
userdata);
}
erlang_comment_entity = '%' nonnewline*;
erlang_entity := |*
space+ ${ entity = ERLANG_SPACE; } => erlang_ecallback;
erlang_comment_entity ${ entity = ERLANG_COMMENT; } => erlang_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with Erlang 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_erlang(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) ? erlang_en_erlang_line : erlang_en_erlang_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(ERLANG_LANG) }
}
#endif
/*****************************************************************************/