// java.rl written by Mitchell Foral. mitchell<att>caladbolg<dott>net.
/************************* Required for every parser *************************/
#ifndef OHCOUNT_JAVA_PARSER_H
#define OHCOUNT_JAVA_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *JAVA_LANG = LANG_JAVA;
// the languages entities
const char *java_entities[] = {
"space", "comment", "string", "number",
"keyword", "identifier", "operator", "any"
};
// constants associated with the entities
enum {
JAVA_SPACE = 0, JAVA_COMMENT, JAVA_STRING, JAVA_NUMBER,
JAVA_KEYWORD, JAVA_IDENTIFIER, JAVA_OPERATOR, JAVA_ANY
};
/*****************************************************************************/
%%{
machine java;
write data;
include common "common.rl";
# Line counting machine
action java_ccallback {
switch(entity) {
case JAVA_SPACE:
ls
break;
case JAVA_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(JAVA_LANG)
break;
case NEWLINE:
std_newline(JAVA_LANG)
}
}
java_line_comment = '//' @comment nonnewline*;
java_block_comment =
'/*' @comment (
newline %{ entity = INTERNAL_NL; } %java_ccallback
|
ws
|
(nonnewline - ws) @comment
)* :>> '*/';
java_comment = java_line_comment | java_block_comment;
java_sq_str = '\'' @code ([^\r\n\f'\\] | '\\' nonnewline)* '\'';
java_dq_str = '"' @code ([^\r\n\f"\\] | '\\' nonnewline)* '"';
java_string = java_sq_str | java_dq_str;
java_line := |*
spaces ${ entity = JAVA_SPACE; } => java_ccallback;
java_comment;
java_string;
newline ${ entity = NEWLINE; } => java_ccallback;
^space ${ entity = JAVA_ANY; } => java_ccallback;
*|;
# Entity machine
action java_ecallback {
callback(JAVA_LANG, java_entities[entity], cint(ts), cint(te), userdata);
}
java_line_comment_entity = '//' nonnewline*;
java_block_comment_entity = '/*' any* :>> '*/';
java_comment_entity = java_line_comment_entity | java_block_comment_entity;
java_entity := |*
space+ ${ entity = JAVA_SPACE; } => java_ecallback;
java_comment_entity ${ entity = JAVA_COMMENT; } => java_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with Java 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_java(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) ? java_en_java_line : java_en_java_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(JAVA_LANG) }
}
#endif
/*****************************************************************************/