// autoconf.rl written by Mitchell Foral. mitchell<att>caladbolg<dott>net.
/************************* Required for every parser *************************/
#ifndef OHCOUNT_AUTOCONF_PARSER_H
#define OHCOUNT_AUTOCONF_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *AC_LANG = LANG_AUTOCONF;
// the languages entities
const char *ac_entities[] = {
"space", "comment", "string", "any"
};
// constants associated with the entities
enum {
AC_SPACE = 0, AC_COMMENT, AC_STRING, AC_ANY
};
/*****************************************************************************/
%%{
machine autoconf;
write data;
include common "common.rl";
# Line counting machine
action ac_ccallback {
switch(entity) {
case AC_SPACE:
ls
break;
case AC_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(AC_LANG)
break;
case NEWLINE:
std_newline(AC_LANG)
}
}
action ac_str_nc_res { nest_count = 0; }
action ac_str_nc_inc { nest_count++; }
action ac_str_nc_dec { nest_count--; }
ac_comment = 'dnl' @comment (ws+ nonnewline+)?;
ac_string =
'[' >ac_str_nc_res @code (
newline %{ entity = INTERNAL_NL; } %ac_ccallback
|
ws
|
'[' @ac_str_nc_inc @code
|
']' @ac_str_nc_dec @code
|
(nonnewline - ws - [\[\]]) @code
)* :>> (']' when { nest_count == 0 });
ac_line := |*
spaces ${ entity = AC_SPACE; } => ac_ccallback;
ac_comment;
ac_string;
newline ${ entity = NEWLINE; } => ac_ccallback;
^space ${ entity = AC_ANY; } => ac_ccallback;
*|;
# Entity machine
action ac_ecallback {
callback(AC_LANG, ac_entities[entity], cint(ts), cint(te), userdata);
}
ac_comment_entity = 'dnl' ws+ nonnewline*;
ac_entity := |*
space+ ${ entity = AC_SPACE; } => ac_ecallback;
ac_comment_entity ${ entity = AC_COMMENT; } => ac_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with Autoconf 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_autoconf(char *buffer, int length, int count,
void (*callback) (const char *lang, const char *entity,
int s, int e, void *udata),
void *userdata
) {
init
int nest_count = 0;
%% write init;
cs = (count) ? autoconf_en_ac_line : autoconf_en_ac_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(AC_LANG) }
}
#endif
/*****************************************************************************/