// dcl.rl written by Mitchell Foral. mitchell<att>caladbolg<dott>net
/************************* Required for every parser *************************/
#ifndef OHCOUNT_DCL_PARSER_H
#define OHCOUNT_DCL_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *DCL_LANG = LANG_DCL;
// the languages entities
const char *dcl_entities[] = {
"space", "line_start", "comment", "string", "any"
};
// constants associated with the entities
enum {
DCL_SPACE = 0, DCL_LINE_START, DCL_COMMENT, DCL_STRING, DCL_ANY
};
/*****************************************************************************/
%%{
machine dcl;
write data;
include common "common.rl";
# Line counting machine
action dcl_ccallback {
switch(entity) {
case DCL_SPACE:
case DCL_LINE_START:
ls
break;
case DCL_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(DCL_LANG)
break;
case NEWLINE:
std_newline(DCL_LANG)
}
}
dcl_comment = '!' @comment nonnewline*;
dcl_string = '"' @code ([^\r\n\f"\\] | '\\' nonnewline)* '"';
dcl_line := |*
'$' ${ entity = DCL_LINE_START; } => dcl_ccallback;
spaces ${ entity = DCL_SPACE; } => dcl_ccallback;
dcl_comment;
dcl_string;
newline ${ entity = NEWLINE; } => dcl_ccallback;
^(space | '$') ${ entity = DCL_ANY; } => dcl_ccallback;
*|;
# Entity machine
action dcl_ecallback {
callback(DCL_LANG, dcl_entities[entity], cint(ts), cint(te), userdata);
}
dcl_comment_entity = '!' nonnewline*;
dcl_entity := |*
space+ ${ entity = DCL_SPACE; } => dcl_ecallback;
dcl_comment_entity ${ entity = DCL_COMMENT; } => dcl_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with DCL 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_dcl(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) ? dcl_en_dcl_line : dcl_en_dcl_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(DCL_LANG) }
}
#endif
/*****************************************************************************/