// octave.rl based on Mitchell Foral's matlab.rl, modified my Jason Riedy <jason@acm.org>
/************************* Required for every parser *************************/
#ifndef OHCOUNT_OCTAVE_PARSER_H
#define OHCOUNT_OCTAVE_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *OCTAVE_LANG = LANG_OCTAVE;
// the languages entities
const char *octave_entities[] = {
"space", "comment", "string", "any",
};
// constants associated with the entities
enum {
OCTAVE_SPACE = 0, OCTAVE_COMMENT, OCTAVE_STRING, OCTAVE_ANY
};
/*****************************************************************************/
%%{
machine octave;
write data;
include common "common.rl";
# Line counting machine
action octave_ccallback {
switch(entity) {
case OCTAVE_SPACE:
ls
break;
case OCTAVE_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(OCTAVE_LANG)
break;
case NEWLINE:
std_newline(OCTAVE_LANG)
}
}
# note: GNU Octave accepts % as well as #, but not '...' at the moment. We
# accept it anyways, as that may change. Also, GNU Octave does not currently
# support block comments but likely will someday.
octave_line_comment = (('%' | '...') [^{] @{ fhold; } | '#') @comment nonnewline*;
octave_block_comment =
'%{' @comment (
newline %{ entity = INTERNAL_NL; } %octave_ccallback
|
ws
|
(nonnewline - ws) @code
)* :>> '%}';
octave_comment = octave_line_comment | octave_block_comment;
octave_sq_str = '\'' @code ([^\r\n\f'\\] | '\\' nonnewline)* '\'';
octave_dq_str = '"' @code ([^\r\n\f"\\] | '\\' nonnewline)* '"';
octave_string = octave_sq_str | octave_dq_str;
octave_line := |*
spaces ${ entity = OCTAVE_SPACE; } => octave_ccallback;
octave_comment;
octave_string;
newline ${ entity = NEWLINE; } => octave_ccallback;
^space ${ entity = OCTAVE_ANY; } => octave_ccallback;
*|;
# Entity machine
action octave_ecallback {
callback(OCTAVE_LANG, octave_entities[entity], cint(ts), cint(te),
userdata);
}
octave_line_comment_entity = (('%' | '...') [^{] @{ fhold; } | '#') nonnewline*;
octave_block_comment_entity = '%{' any* :>> '%}';
octave_comment_entity =
octave_line_comment_entity | octave_block_comment_entity;
octave_entity := |*
space+ ${ entity = OCTAVE_SPACE; } => octave_ecallback;
octave_comment_entity ${ entity = OCTAVE_COMMENT; } => octave_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with OCTAVE 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_octave(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) ? octave_en_octave_line : octave_en_octave_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(OCTAVE_LANG) }
}
#endif
/*****************************************************************************/